?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[SCSI] aic79xx: use tcq functions
[firewire-audio.git] / drivers / scsi / aic7xxx / aic79xx_osm.c
blob4eb7bba24a68ea142c78318424d925de5142e629
1 /*
2 * Adaptec AIC79xx device driver for Linux.
3 *
4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $
5 *
6 * --------------------------------------------------------------------------
7 * Copyright (c) 1994-2000 Justin T. Gibbs.
8 * Copyright (c) 1997-1999 Doug Ledford
9 * Copyright (c) 2000-2003 Adaptec Inc.
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the following disclaimer,
17 * without modification.
18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19 * substantially similar to the "NO WARRANTY" disclaimer below
20 * ("Disclaimer") and any redistribution must be conditioned upon
21 * including a substantially similar Disclaimer requirement for further
22 * binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
30 *
31 * NO WARRANTY
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGES.
43 */
44
45 #include "aic79xx_osm.h"
46 #include "aic79xx_inline.h"
47 #include <scsi/scsicam.h>
48
49 static struct scsi_transport_template *ahd_linux_transport_template = NULL;
50
51 #include <linux/init.h> /* __setup */
52 #include <linux/mm.h> /* For fetching system memory size */
53 #include <linux/blkdev.h> /* For block_size() */
54 #include <linux/delay.h> /* For ssleep/msleep */
55 #include <linux/device.h>
56
57 /*
58 * Bucket size for counting good commands in between bad ones.
59 */
60 #define AHD_LINUX_ERR_THRESH 1000
61
62 /*
63 * Set this to the delay in seconds after SCSI bus reset.
64 * Note, we honor this only for the initial bus reset.
65 * The scsi error recovery code performs its own bus settle
66 * delay handling for error recovery actions.
67 */
68 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS
69 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
70 #else
71 #define AIC79XX_RESET_DELAY 5000
72 #endif
73
74 /*
75 * To change the default number of tagged transactions allowed per-device,
76 * add a line to the lilo.conf file like:
77 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
78 * which will result in the first four devices on the first two
79 * controllers being set to a tagged queue depth of 32.
80 *
81 * The tag_commands is an array of 16 to allow for wide and twin adapters.
82 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
83 * for channel 1.
84 */
85 typedef struct {
86 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */
87 } adapter_tag_info_t;
88
89 /*
90 * Modify this as you see fit for your system.
91 *
92 * 0 tagged queuing disabled
93 * 1 <= n <= 253 n == max tags ever dispatched.
94 *
95 * The driver will throttle the number of commands dispatched to a
96 * device if it returns queue full. For devices with a fixed maximum
97 * queue depth, the driver will eventually determine this depth and
98 * lock it in (a console message is printed to indicate that a lock
99 * has occurred). On some devices, queue full is returned for a temporary
100 * resource shortage. These devices will return queue full at varying
101 * depths. The driver will throttle back when the queue fulls occur and
102 * attempt to slowly increase the depth over time as the device recovers
103 * from the resource shortage.
104 *
105 * In this example, the first line will disable tagged queueing for all
106 * the devices on the first probed aic79xx adapter.
107 *
108 * The second line enables tagged queueing with 4 commands/LUN for IDs
109 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
110 * driver to attempt to use up to 64 tags for ID 1.
111 *
112 * The third line is the same as the first line.
113 *
114 * The fourth line disables tagged queueing for devices 0 and 3. It
115 * enables tagged queueing for the other IDs, with 16 commands/LUN
116 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
117 * IDs 2, 5-7, and 9-15.
118 */
119
120 /*
121 * NOTE: The below structure is for reference only, the actual structure
122 * to modify in order to change things is just below this comment block.
123 adapter_tag_info_t aic79xx_tag_info[] =
124 {
125 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
126 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
127 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
128 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
129 };
130 */
131
132 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
133 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
134 #else
135 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
136 #endif
137
138 #define AIC79XX_CONFIGED_TAG_COMMANDS { \
139 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
140 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
141 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
142 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
143 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
144 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
145 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
146 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \
147 }
148
149 /*
150 * By default, use the number of commands specified by
151 * the users kernel configuration.
152 */
153 static adapter_tag_info_t aic79xx_tag_info[] =
154 {
155 {AIC79XX_CONFIGED_TAG_COMMANDS},
156 {AIC79XX_CONFIGED_TAG_COMMANDS},
157 {AIC79XX_CONFIGED_TAG_COMMANDS},
158 {AIC79XX_CONFIGED_TAG_COMMANDS},
159 {AIC79XX_CONFIGED_TAG_COMMANDS},
160 {AIC79XX_CONFIGED_TAG_COMMANDS},
161 {AIC79XX_CONFIGED_TAG_COMMANDS},
162 {AIC79XX_CONFIGED_TAG_COMMANDS},
163 {AIC79XX_CONFIGED_TAG_COMMANDS},
164 {AIC79XX_CONFIGED_TAG_COMMANDS},
165 {AIC79XX_CONFIGED_TAG_COMMANDS},
166 {AIC79XX_CONFIGED_TAG_COMMANDS},
167 {AIC79XX_CONFIGED_TAG_COMMANDS},
168 {AIC79XX_CONFIGED_TAG_COMMANDS},
169 {AIC79XX_CONFIGED_TAG_COMMANDS},
170 {AIC79XX_CONFIGED_TAG_COMMANDS}
171 };
172
173 /*
174 * The I/O cell on the chip is very configurable in respect to its analog
175 * characteristics. Set the defaults here; they can be overriden with
176 * the proper insmod parameters.
177 */
178 struct ahd_linux_iocell_opts
179 {
180 uint8_t precomp;
181 uint8_t slewrate;
182 uint8_t amplitude;
183 };
184 #define AIC79XX_DEFAULT_PRECOMP 0xFF
185 #define AIC79XX_DEFAULT_SLEWRATE 0xFF
186 #define AIC79XX_DEFAULT_AMPLITUDE 0xFF
187 #define AIC79XX_DEFAULT_IOOPTS \
188 { \
189 AIC79XX_DEFAULT_PRECOMP, \
190 AIC79XX_DEFAULT_SLEWRATE, \
191 AIC79XX_DEFAULT_AMPLITUDE \
192 }
193 #define AIC79XX_PRECOMP_INDEX 0
194 #define AIC79XX_SLEWRATE_INDEX 1
195 #define AIC79XX_AMPLITUDE_INDEX 2
196 static struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
197 {
198 AIC79XX_DEFAULT_IOOPTS,
199 AIC79XX_DEFAULT_IOOPTS,
200 AIC79XX_DEFAULT_IOOPTS,
201 AIC79XX_DEFAULT_IOOPTS,
202 AIC79XX_DEFAULT_IOOPTS,
203 AIC79XX_DEFAULT_IOOPTS,
204 AIC79XX_DEFAULT_IOOPTS,
205 AIC79XX_DEFAULT_IOOPTS,
206 AIC79XX_DEFAULT_IOOPTS,
207 AIC79XX_DEFAULT_IOOPTS,
208 AIC79XX_DEFAULT_IOOPTS,
209 AIC79XX_DEFAULT_IOOPTS,
210 AIC79XX_DEFAULT_IOOPTS,
211 AIC79XX_DEFAULT_IOOPTS,
212 AIC79XX_DEFAULT_IOOPTS,
213 AIC79XX_DEFAULT_IOOPTS
214 };
215
216 /*
217 * There should be a specific return value for this in scsi.h, but
218 * it seems that most drivers ignore it.
219 */
220 #define DID_UNDERFLOW DID_ERROR
221
222 void
223 ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
224 {
225 printk("(scsi%d:%c:%d:%d): ",
226 ahd->platform_data->host->host_no,
227 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
228 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
229 scb != NULL ? SCB_GET_LUN(scb) : -1);
230 }
231
232 /*
233 * XXX - these options apply unilaterally to _all_ adapters
234 * cards in the system. This should be fixed. Exceptions to this
235 * rule are noted in the comments.
236 */
237
238 /*
239 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
240 * has no effect on any later resets that might occur due to things like
241 * SCSI bus timeouts.
242 */
243 static uint32_t aic79xx_no_reset;
244
245 /*
246 * Certain PCI motherboards will scan PCI devices from highest to lowest,
247 * others scan from lowest to highest, and they tend to do all kinds of
248 * strange things when they come into contact with PCI bridge chips. The
249 * net result of all this is that the PCI card that is actually used to boot
250 * the machine is very hard to detect. Most motherboards go from lowest
251 * PCI slot number to highest, and the first SCSI controller found is the
252 * one you boot from. The only exceptions to this are when a controller
253 * has its BIOS disabled. So, we by default sort all of our SCSI controllers
254 * from lowest PCI slot number to highest PCI slot number. We also force
255 * all controllers with their BIOS disabled to the end of the list. This
256 * works on *almost* all computers. Where it doesn't work, we have this
257 * option. Setting this option to non-0 will reverse the order of the sort
258 * to highest first, then lowest, but will still leave cards with their BIOS
259 * disabled at the very end. That should fix everyone up unless there are
260 * really strange cirumstances.
261 */
262 static uint32_t aic79xx_reverse_scan;
263
264 /*
265 * Should we force EXTENDED translation on a controller.
266 * 0 == Use whatever is in the SEEPROM or default to off
267 * 1 == Use whatever is in the SEEPROM or default to on
268 */
269 static uint32_t aic79xx_extended;
270
271 /*
272 * PCI bus parity checking of the Adaptec controllers. This is somewhat
273 * dubious at best. To my knowledge, this option has never actually
274 * solved a PCI parity problem, but on certain machines with broken PCI
275 * chipset configurations, it can generate tons of false error messages.
276 * It's included in the driver for completeness.
277 * 0 = Shut off PCI parity check
278 * non-0 = Enable PCI parity check
279 *
280 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
281 * variable to -1 you would actually want to simply pass the variable
282 * name without a number. That will invert the 0 which will result in
283 * -1.
284 */
285 static uint32_t aic79xx_pci_parity = ~0;
286
287 /*
288 * There are lots of broken chipsets in the world. Some of them will
289 * violate the PCI spec when we issue byte sized memory writes to our
290 * controller. I/O mapped register access, if allowed by the given
291 * platform, will work in almost all cases.
292 */
293 uint32_t aic79xx_allow_memio = ~0;
294
295 /*
296 * So that we can set how long each device is given as a selection timeout.
297 * The table of values goes like this:
298 * 0 - 256ms
299 * 1 - 128ms
300 * 2 - 64ms
301 * 3 - 32ms
302 * We default to 256ms because some older devices need a longer time
303 * to respond to initial selection.
304 */
305 static uint32_t aic79xx_seltime;
306
307 /*
308 * Certain devices do not perform any aging on commands. Should the
309 * device be saturated by commands in one portion of the disk, it is
310 * possible for transactions on far away sectors to never be serviced.
311 * To handle these devices, we can periodically send an ordered tag to
312 * force all outstanding transactions to be serviced prior to a new
313 * transaction.
314 */
315 uint32_t aic79xx_periodic_otag;
316
317 /* Some storage boxes are using an LSI chip which has a bug making it
318 * impossible to use aic79xx Rev B chip in 320 speeds. The following
319 * storage boxes have been reported to be buggy:
320 * EonStor 3U 16-Bay: U16U-G3A3
321 * EonStor 2U 12-Bay: U12U-G3A3
322 * SentinelRAID: 2500F R5 / R6
323 * SentinelRAID: 2500F R1
324 * SentinelRAID: 2500F/1500F
325 * SentinelRAID: 150F
326 *
327 * To get around this LSI bug, you can set your board to 160 mode
328 * or you can enable the SLOWCRC bit.
329 */
330 uint32_t aic79xx_slowcrc;
331
332 /*
333 * Module information and settable options.
334 */
335 static char *aic79xx = NULL;
336
337 MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
338 MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver");
339 MODULE_LICENSE("Dual BSD/GPL");
340 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
341 module_param(aic79xx, charp, 0444);
342 MODULE_PARM_DESC(aic79xx,
343 "period delimited, options string.\n"
344 " verbose Enable verbose/diagnostic logging\n"
345 " allow_memio Allow device registers to be memory mapped\n"
346 " debug Bitmask of debug values to enable\n"
347 " no_reset Supress initial bus resets\n"
348 " extended Enable extended geometry on all controllers\n"
349 " periodic_otag Send an ordered tagged transaction\n"
350 " periodically to prevent tag starvation.\n"
351 " This may be required by some older disk\n"
352 " or drives/RAID arrays.\n"
353 " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
354 " tag_info:<tag_str> Set per-target tag depth\n"
355 " global_tag_depth:<int> Global tag depth for all targets on all buses\n"
356 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
357 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
358 " amplitude:<int> Set the signal amplitude (0-7).\n"
359 " seltime:<int> Selection Timeout:\n"
360 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
361 " slowcrc Turn on the SLOWCRC bit (Rev B only)\n"
362 "\n"
363 " Sample /etc/modprobe.conf line:\n"
364 " Enable verbose logging\n"
365 " Set tag depth on Controller 2/Target 2 to 10 tags\n"
366 " Shorten the selection timeout to 128ms\n"
367 "\n"
368 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
369 "\n");
370
371 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
372 struct scsi_device *,
373 struct scb *);
374 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
375 struct scsi_cmnd *cmd);
376 static int ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
377 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
378 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
379 struct ahd_devinfo *devinfo);
380 static void ahd_linux_device_queue_depth(struct scsi_device *);
381 static int ahd_linux_run_command(struct ahd_softc*,
382 struct ahd_linux_device *,
383 struct scsi_cmnd *);
384 static void ahd_linux_setup_tag_info_global(char *p);
385 static int aic79xx_setup(char *c);
386
387 static int ahd_linux_unit;
388
389
390 /****************************** Inlines ***************************************/
391 static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
392
393 static __inline void
394 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
395 {
396 struct scsi_cmnd *cmd;
397 int direction;
398
399 cmd = scb->io_ctx;
400 direction = cmd->sc_data_direction;
401 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
402 if (cmd->use_sg != 0) {
403 struct scatterlist *sg;
404
405 sg = (struct scatterlist *)cmd->request_buffer;
406 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction);
407 } else if (cmd->request_bufflen != 0) {
408 pci_unmap_single(ahd->dev_softc,
409 scb->platform_data->buf_busaddr,
410 cmd->request_bufflen, direction);
411 }
412 }
413
414 /******************************** Macros **************************************/
415 #define BUILD_SCSIID(ahd, cmd) \
416 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
417
418 /*
419 * Return a string describing the driver.
420 */
421 static const char *
422 ahd_linux_info(struct Scsi_Host *host)
423 {
424 static char buffer[512];
425 char ahd_info[256];
426 char *bp;
427 struct ahd_softc *ahd;
428
429 bp = &buffer[0];
430 ahd = *(struct ahd_softc **)host->hostdata;
431 memset(bp, 0, sizeof(buffer));
432 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
433 strcat(bp, AIC79XX_DRIVER_VERSION);
434 strcat(bp, "\n");
435 strcat(bp, " <");
436 strcat(bp, ahd->description);
437 strcat(bp, ">\n");
438 strcat(bp, " ");
439 ahd_controller_info(ahd, ahd_info);
440 strcat(bp, ahd_info);
441 strcat(bp, "\n");
442
443 return (bp);
444 }
445
446 /*
447 * Queue an SCB to the controller.
448 */
449 static int
450 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
451 {
452 struct ahd_softc *ahd;
453 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
454 int rtn = SCSI_MLQUEUE_HOST_BUSY;
455
456 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
457
458 cmd->scsi_done = scsi_done;
459 cmd->result = CAM_REQ_INPROG << 16;
460 rtn = ahd_linux_run_command(ahd, dev, cmd);
461
462 return rtn;
463 }
464
465 static inline struct scsi_target **
466 ahd_linux_target_in_softc(struct scsi_target *starget)
467 {
468 struct ahd_softc *ahd =
469 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
470 unsigned int target_offset;
471
472 target_offset = starget->id;
473 if (starget->channel != 0)
474 target_offset += 8;
475
476 return &ahd->platform_data->starget[target_offset];
477 }
478
479 static int
480 ahd_linux_target_alloc(struct scsi_target *starget)
481 {
482 struct ahd_softc *ahd =
483 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
484 unsigned long flags;
485 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
486 struct ahd_linux_target *targ = scsi_transport_target_data(starget);
487 struct ahd_devinfo devinfo;
488 struct ahd_initiator_tinfo *tinfo;
489 struct ahd_tmode_tstate *tstate;
490 char channel = starget->channel + 'A';
491
492 ahd_lock(ahd, &flags);
493
494 BUG_ON(*ahd_targp != NULL);
495
496 *ahd_targp = starget;
497 memset(targ, 0, sizeof(*targ));
498
499 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
500 starget->id, &tstate);
501 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
502 CAM_LUN_WILDCARD, channel,
503 ROLE_INITIATOR);
504 spi_min_period(starget) = AHD_SYNCRATE_MAX; /* We can do U320 */
505 if ((ahd->bugs & AHD_PACED_NEGTABLE_BUG) != 0)
506 spi_max_offset(starget) = MAX_OFFSET_PACED_BUG;
507 else
508 spi_max_offset(starget) = MAX_OFFSET_PACED;
509 spi_max_width(starget) = ahd->features & AHD_WIDE;
510
511 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
512 AHD_TRANS_GOAL, /*paused*/FALSE);
513 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
514 AHD_TRANS_GOAL, /*paused*/FALSE);
515 ahd_unlock(ahd, &flags);
516
517 return 0;
518 }
519
520 static void
521 ahd_linux_target_destroy(struct scsi_target *starget)
522 {
523 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
524
525 *ahd_targp = NULL;
526 }
527
528 static int
529 ahd_linux_slave_alloc(struct scsi_device *sdev)
530 {
531 struct ahd_softc *ahd =
532 *((struct ahd_softc **)sdev->host->hostdata);
533 struct scsi_target *starget = sdev->sdev_target;
534 struct ahd_linux_target *targ = scsi_transport_target_data(starget);
535 struct ahd_linux_device *dev;
536
537 if (bootverbose)
538 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
539
540 BUG_ON(targ->sdev[sdev->lun] != NULL);
541
542 dev = scsi_transport_device_data(sdev);
543 memset(dev, 0, sizeof(*dev));
544
545 /*
546 * We start out life using untagged
547 * transactions of which we allow one.
548 */
549 dev->openings = 1;
550
551 /*
552 * Set maxtags to 0. This will be changed if we
553 * later determine that we are dealing with
554 * a tagged queuing capable device.
555 */
556 dev->maxtags = 0;
557
558 targ->sdev[sdev->lun] = sdev;
559
560 return (0);
561 }
562
563 static int
564 ahd_linux_slave_configure(struct scsi_device *sdev)
565 {
566 struct ahd_softc *ahd;
567
568 ahd = *((struct ahd_softc **)sdev->host->hostdata);
569 if (bootverbose)
570 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
571
572 ahd_linux_device_queue_depth(sdev);
573
574 /* Initial Domain Validation */
575 if (!spi_initial_dv(sdev->sdev_target))
576 spi_dv_device(sdev);
577
578 return 0;
579 }
580
581 static void
582 ahd_linux_slave_destroy(struct scsi_device *sdev)
583 {
584 struct ahd_softc *ahd;
585 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
586 struct ahd_linux_target *targ = scsi_transport_target_data(sdev->sdev_target);
587
588 ahd = *((struct ahd_softc **)sdev->host->hostdata);
589 if (bootverbose)
590 printf("%s: Slave Destroy %d\n", ahd_name(ahd), sdev->id);
591
592 BUG_ON(dev->active);
593
594 targ->sdev[sdev->lun] = NULL;
595
596 }
597
598 #if defined(__i386__)
599 /*
600 * Return the disk geometry for the given SCSI device.
601 */
602 static int
603 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
604 sector_t capacity, int geom[])
605 {
606 uint8_t *bh;
607 int heads;
608 int sectors;
609 int cylinders;
610 int ret;
611 int extended;
612 struct ahd_softc *ahd;
613
614 ahd = *((struct ahd_softc **)sdev->host->hostdata);
615
616 bh = scsi_bios_ptable(bdev);
617 if (bh) {
618 ret = scsi_partsize(bh, capacity,
619 &geom[2], &geom[0], &geom[1]);
620 kfree(bh);
621 if (ret != -1)
622 return (ret);
623 }
624 heads = 64;
625 sectors = 32;
626 cylinders = aic_sector_div(capacity, heads, sectors);
627
628 if (aic79xx_extended != 0)
629 extended = 1;
630 else
631 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
632 if (extended && cylinders >= 1024) {
633 heads = 255;
634 sectors = 63;
635 cylinders = aic_sector_div(capacity, heads, sectors);
636 }
637 geom[0] = heads;
638 geom[1] = sectors;
639 geom[2] = cylinders;
640 return (0);
641 }
642 #endif
643
644 /*
645 * Abort the current SCSI command(s).
646 */
647 static int
648 ahd_linux_abort(struct scsi_cmnd *cmd)
649 {
650 int error;
651
652 error = ahd_linux_queue_recovery_cmd(cmd, SCB_ABORT);
653 if (error != 0)
654 printf("aic79xx_abort returns 0x%x\n", error);
655 return error;
656 }
657
658 /*
659 * Attempt to send a target reset message to the device that timed out.
660 */
661 static int
662 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
663 {
664 int error;
665
666 error = ahd_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
667 if (error != 0)
668 printf("aic79xx_dev_reset returns 0x%x\n", error);
669 return error;
670 }
671
672 /*
673 * Reset the SCSI bus.
674 */
675 static int
676 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
677 {
678 struct ahd_softc *ahd;
679 int found;
680
681 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
682 #ifdef AHD_DEBUG
683 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
684 printf("%s: Bus reset called for cmd %p\n",
685 ahd_name(ahd), cmd);
686 #endif
687 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
688 /*initiate reset*/TRUE);
689
690 if (bootverbose)
691 printf("%s: SCSI bus reset delivered. "
692 "%d SCBs aborted.\n", ahd_name(ahd), found);
693
694 return (SUCCESS);
695 }
696
697 struct scsi_host_template aic79xx_driver_template = {
698 .module = THIS_MODULE,
699 .name = "aic79xx",
700 .proc_name = "aic79xx",
701 .proc_info = ahd_linux_proc_info,
702 .info = ahd_linux_info,
703 .queuecommand = ahd_linux_queue,
704 .eh_abort_handler = ahd_linux_abort,
705 .eh_device_reset_handler = ahd_linux_dev_reset,
706 .eh_bus_reset_handler = ahd_linux_bus_reset,
707 #if defined(__i386__)
708 .bios_param = ahd_linux_biosparam,
709 #endif
710 .can_queue = AHD_MAX_QUEUE,
711 .this_id = -1,
712 .cmd_per_lun = 2,
713 .use_clustering = ENABLE_CLUSTERING,
714 .slave_alloc = ahd_linux_slave_alloc,
715 .slave_configure = ahd_linux_slave_configure,
716 .slave_destroy = ahd_linux_slave_destroy,
717 .target_alloc = ahd_linux_target_alloc,
718 .target_destroy = ahd_linux_target_destroy,
719 };
720
721 /******************************** Bus DMA *************************************/
722 int
723 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
724 bus_size_t alignment, bus_size_t boundary,
725 dma_addr_t lowaddr, dma_addr_t highaddr,
726 bus_dma_filter_t *filter, void *filterarg,
727 bus_size_t maxsize, int nsegments,
728 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
729 {
730 bus_dma_tag_t dmat;
731
732 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
733 if (dmat == NULL)
734 return (ENOMEM);
735
736 /*
737 * Linux is very simplistic about DMA memory. For now don't
738 * maintain all specification information. Once Linux supplies
739 * better facilities for doing these operations, or the
740 * needs of this particular driver change, we might need to do
741 * more here.
742 */
743 dmat->alignment = alignment;
744 dmat->boundary = boundary;
745 dmat->maxsize = maxsize;
746 *ret_tag = dmat;
747 return (0);
748 }
749
750 void
751 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
752 {
753 free(dmat, M_DEVBUF);
754 }
755
756 int
757 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
758 int flags, bus_dmamap_t *mapp)
759 {
760 *vaddr = pci_alloc_consistent(ahd->dev_softc,
761 dmat->maxsize, mapp);
762 if (*vaddr == NULL)
763 return (ENOMEM);
764 return(0);
765 }
766
767 void
768 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
769 void* vaddr, bus_dmamap_t map)
770 {
771 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
772 vaddr, map);
773 }
774
775 int
776 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
777 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
778 void *cb_arg, int flags)
779 {
780 /*
781 * Assume for now that this will only be used during
782 * initialization and not for per-transaction buffer mapping.
783 */
784 bus_dma_segment_t stack_sg;
785
786 stack_sg.ds_addr = map;
787 stack_sg.ds_len = dmat->maxsize;
788 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
789 return (0);
790 }
791
792 void
793 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
794 {
795 }
796
797 int
798 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
799 {
800 /* Nothing to do */
801 return (0);
802 }
803
804 /********************* Platform Dependent Functions ***************************/
805 /*
806 * Compare "left hand" softc with "right hand" softc, returning:
807 * < 0 - lahd has a lower priority than rahd
808 * 0 - Softcs are equal
809 * > 0 - lahd has a higher priority than rahd
810 */
811 int
812 ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd)
813 {
814 int value;
815
816 /*
817 * Under Linux, cards are ordered as follows:
818 * 1) PCI devices that are marked as the boot controller.
819 * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
820 * 3) All remaining PCI devices sorted by bus/slot/func.
821 */
822 #if 0
823 value = (lahd->flags & AHD_BOOT_CHANNEL)
824 - (rahd->flags & AHD_BOOT_CHANNEL);
825 if (value != 0)
826 /* Controllers set for boot have a *higher* priority */
827 return (value);
828 #endif
829
830 value = (lahd->flags & AHD_BIOS_ENABLED)
831 - (rahd->flags & AHD_BIOS_ENABLED);
832 if (value != 0)
833 /* Controllers with BIOS enabled have a *higher* priority */
834 return (value);
835
836 /* Still equal. Sort by bus/slot/func. */
837 if (aic79xx_reverse_scan != 0)
838 value = ahd_get_pci_bus(lahd->dev_softc)
839 - ahd_get_pci_bus(rahd->dev_softc);
840 else
841 value = ahd_get_pci_bus(rahd->dev_softc)
842 - ahd_get_pci_bus(lahd->dev_softc);
843 if (value != 0)
844 return (value);
845 if (aic79xx_reverse_scan != 0)
846 value = ahd_get_pci_slot(lahd->dev_softc)
847 - ahd_get_pci_slot(rahd->dev_softc);
848 else
849 value = ahd_get_pci_slot(rahd->dev_softc)
850 - ahd_get_pci_slot(lahd->dev_softc);
851 if (value != 0)
852 return (value);
853
854 value = rahd->channel - lahd->channel;
855 return (value);
856 }
857
858 static void
859 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
860 {
861
862 if ((instance >= 0)
863 && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
864 uint8_t *iocell_info;
865
866 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
867 iocell_info[index] = value & 0xFFFF;
868 if (bootverbose)
869 printf("iocell[%d:%ld] = %d\n", instance, index, value);
870 }
871 }
872
873 static void
874 ahd_linux_setup_tag_info_global(char *p)
875 {
876 int tags, i, j;
877
878 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
879 printf("Setting Global Tags= %d\n", tags);
880
881 for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
882 for (j = 0; j < AHD_NUM_TARGETS; j++) {
883 aic79xx_tag_info[i].tag_commands[j] = tags;
884 }
885 }
886 }
887
888 static void
889 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
890 {
891
892 if ((instance >= 0) && (targ >= 0)
893 && (instance < NUM_ELEMENTS(aic79xx_tag_info))
894 && (targ < AHD_NUM_TARGETS)) {
895 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
896 if (bootverbose)
897 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
898 }
899 }
900
901 static char *
902 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
903 void (*callback)(u_long, int, int, int32_t),
904 u_long callback_arg)
905 {
906 char *tok_end;
907 char *tok_end2;
908 int i;
909 int instance;
910 int targ;
911 int done;
912 char tok_list[] = {'.', ',', '{', '}', '\0'};
913
914 /* All options use a ':' name/arg separator */
915 if (*opt_arg != ':')
916 return (opt_arg);
917 opt_arg++;
918 instance = -1;
919 targ = -1;
920 done = FALSE;
921 /*
922 * Restore separator that may be in
923 * the middle of our option argument.
924 */
925 tok_end = strchr(opt_arg, '\0');
926 if (tok_end < end)
927 *tok_end = ',';
928 while (!done) {
929 switch (*opt_arg) {
930 case '{':
931 if (instance == -1) {
932 instance = 0;
933 } else {
934 if (depth > 1) {
935 if (targ == -1)
936 targ = 0;
937 } else {
938 printf("Malformed Option %s\n",
939 opt_name);
940 done = TRUE;
941 }
942 }
943 opt_arg++;
944 break;
945 case '}':
946 if (targ != -1)
947 targ = -1;
948 else if (instance != -1)
949 instance = -1;
950 opt_arg++;
951 break;
952 case ',':
953 case '.':
954 if (instance == -1)
955 done = TRUE;
956 else if (targ >= 0)
957 targ++;
958 else if (instance >= 0)
959 instance++;
960 opt_arg++;
961 break;
962 case '\0':
963 done = TRUE;
964 break;
965 default:
966 tok_end = end;
967 for (i = 0; tok_list[i]; i++) {
968 tok_end2 = strchr(opt_arg, tok_list[i]);
969 if ((tok_end2) && (tok_end2 < tok_end))
970 tok_end = tok_end2;
971 }
972 callback(callback_arg, instance, targ,
973 simple_strtol(opt_arg, NULL, 0));
974 opt_arg = tok_end;
975 break;
976 }
977 }
978 return (opt_arg);
979 }
980
981 /*
982 * Handle Linux boot parameters. This routine allows for assigning a value
983 * to a parameter with a ':' between the parameter and the value.
984 * ie. aic79xx=stpwlev:1,extended
985 */
986 static int
987 aic79xx_setup(char *s)
988 {
989 int i, n;
990 char *p;
991 char *end;
992
993 static struct {
994 const char *name;
995 uint32_t *flag;
996 } options[] = {
997 { "extended", &aic79xx_extended },
998 { "no_reset", &aic79xx_no_reset },
999 { "verbose", &aic79xx_verbose },
1000 { "allow_memio", &aic79xx_allow_memio},
1001 #ifdef AHD_DEBUG
1002 { "debug", &ahd_debug },
1003 #endif
1004 { "reverse_scan", &aic79xx_reverse_scan },
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 NUM_ELEMENTS
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 < NUM_ELEMENTS(options); i++) {
1028
1029 n = strlen(options[i].name);
1030 if (strncmp(options[i].name, p, n) == 0)
1031 break;
1032 }
1033 if (i == NUM_ELEMENTS(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 uint64_t
1120 ahd_linux_get_memsize(void)
1121 {
1122 struct sysinfo si;
1123
1124 si_meminfo(&si);
1125 return ((uint64_t)si.totalram << PAGE_SHIFT);
1126 }
1127
1128 /*
1129 * Place the SCSI bus into a known state by either resetting it,
1130 * or forcing transfer negotiations on the next command to any
1131 * target.
1132 */
1133 static void
1134 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1135 {
1136 u_int target_id;
1137 u_int numtarg;
1138 unsigned long s;
1139
1140 target_id = 0;
1141 numtarg = 0;
1142
1143 if (aic79xx_no_reset != 0)
1144 ahd->flags &= ~AHD_RESET_BUS_A;
1145
1146 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1147 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1148 else
1149 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1150
1151 ahd_lock(ahd, &s);
1152
1153 /*
1154 * Force negotiation to async for all targets that
1155 * will not see an initial bus reset.
1156 */
1157 for (; target_id < numtarg; target_id++) {
1158 struct ahd_devinfo devinfo;
1159 struct ahd_initiator_tinfo *tinfo;
1160 struct ahd_tmode_tstate *tstate;
1161
1162 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1163 target_id, &tstate);
1164 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1165 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1166 ahd_update_neg_request(ahd, &devinfo, tstate,
1167 tinfo, AHD_NEG_ALWAYS);
1168 }
1169 ahd_unlock(ahd, &s);
1170 /* Give the bus some time to recover */
1171 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1172 ahd_freeze_simq(ahd);
1173 msleep(AIC79XX_RESET_DELAY);
1174 ahd_release_simq(ahd);
1175 }
1176 }
1177
1178 int
1179 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1180 {
1181 ahd->platform_data =
1182 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1183 if (ahd->platform_data == NULL)
1184 return (ENOMEM);
1185 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1186 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1187 ahd_lockinit(ahd);
1188 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1189 return (0);
1190 }
1191
1192 void
1193 ahd_platform_free(struct ahd_softc *ahd)
1194 {
1195 struct scsi_target *starget;
1196 int i, j;
1197
1198 if (ahd->platform_data != NULL) {
1199 /* destroy all of the device and target objects */
1200 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1201 starget = ahd->platform_data->starget[i];
1202 if (starget != NULL) {
1203 for (j = 0; j < AHD_NUM_LUNS; j++) {
1204 struct ahd_linux_target *targ =
1205 scsi_transport_target_data(starget);
1206 if (targ->sdev[j] == NULL)
1207 continue;
1208 targ->sdev[j] = NULL;
1209 }
1210 ahd->platform_data->starget[i] = NULL;
1211 }
1212 }
1213
1214 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1215 free_irq(ahd->platform_data->irq, ahd);
1216 if (ahd->tags[0] == BUS_SPACE_PIO
1217 && ahd->bshs[0].ioport != 0)
1218 release_region(ahd->bshs[0].ioport, 256);
1219 if (ahd->tags[1] == BUS_SPACE_PIO
1220 && ahd->bshs[1].ioport != 0)
1221 release_region(ahd->bshs[1].ioport, 256);
1222 if (ahd->tags[0] == BUS_SPACE_MEMIO
1223 && ahd->bshs[0].maddr != NULL) {
1224 iounmap(ahd->bshs[0].maddr);
1225 release_mem_region(ahd->platform_data->mem_busaddr,
1226 0x1000);
1227 }
1228 if (ahd->platform_data->host)
1229 scsi_host_put(ahd->platform_data->host);
1230
1231 free(ahd->platform_data, M_DEVBUF);
1232 }
1233 }
1234
1235 void
1236 ahd_platform_init(struct ahd_softc *ahd)
1237 {
1238 /*
1239 * Lookup and commit any modified IO Cell options.
1240 */
1241 if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) {
1242 struct ahd_linux_iocell_opts *iocell_opts;
1243
1244 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1245 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1246 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1247 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1248 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1249 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1250 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1251 }
1252
1253 }
1254
1255 void
1256 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1257 {
1258 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1259 SCB_GET_CHANNEL(ahd, scb),
1260 SCB_GET_LUN(scb), SCB_LIST_NULL,
1261 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1262 }
1263
1264 void
1265 ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
1266 ahd_queue_alg alg)
1267 {
1268 struct scsi_target *starget;
1269 struct ahd_linux_target *targ;
1270 struct ahd_linux_device *dev;
1271 struct scsi_device *sdev;
1272 int was_queuing;
1273 int now_queuing;
1274
1275 starget = ahd->platform_data->starget[devinfo->target];
1276 targ = scsi_transport_target_data(starget);
1277 BUG_ON(targ == NULL);
1278 sdev = targ->sdev[devinfo->lun];
1279 if (sdev == NULL)
1280 return;
1281
1282 dev = scsi_transport_device_data(sdev);
1283
1284 if (dev == NULL)
1285 return;
1286 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1287 switch (alg) {
1288 default:
1289 case AHD_QUEUE_NONE:
1290 now_queuing = 0;
1291 break;
1292 case AHD_QUEUE_BASIC:
1293 now_queuing = AHD_DEV_Q_BASIC;
1294 break;
1295 case AHD_QUEUE_TAGGED:
1296 now_queuing = AHD_DEV_Q_TAGGED;
1297 break;
1298 }
1299 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1300 && (was_queuing != now_queuing)
1301 && (dev->active != 0)) {
1302 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1303 dev->qfrozen++;
1304 }
1305
1306 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1307 if (now_queuing) {
1308 u_int usertags;
1309
1310 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1311 if (!was_queuing) {
1312 /*
1313 * Start out agressively and allow our
1314 * dynamic queue depth algorithm to take
1315 * care of the rest.
1316 */
1317 dev->maxtags = usertags;
1318 dev->openings = dev->maxtags - dev->active;
1319 }
1320 if (dev->maxtags == 0) {
1321 /*
1322 * Queueing is disabled by the user.
1323 */
1324 dev->openings = 1;
1325 } else if (alg == AHD_QUEUE_TAGGED) {
1326 dev->flags |= AHD_DEV_Q_TAGGED;
1327 if (aic79xx_periodic_otag != 0)
1328 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1329 } else
1330 dev->flags |= AHD_DEV_Q_BASIC;
1331 } else {
1332 /* We can only have one opening. */
1333 dev->maxtags = 0;
1334 dev->openings = 1 - dev->active;
1335 }
1336
1337 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1338 case AHD_DEV_Q_BASIC:
1339 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1340 scsi_activate_tcq(sdev, dev->openings + dev->active);
1341 break;
1342 case AHD_DEV_Q_TAGGED:
1343 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1344 scsi_activate_tcq(sdev, dev->openings + dev->active);
1345 break;
1346 default:
1347 /*
1348 * We allow the OS to queue 2 untagged transactions to
1349 * us at any time even though we can only execute them
1350 * serially on the controller/device. This should
1351 * remove some latency.
1352 */
1353 scsi_deactivate_tcq(sdev, 1);
1354 break;
1355 }
1356 }
1357
1358 int
1359 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1360 int lun, u_int tag, role_t role, uint32_t status)
1361 {
1362 return 0;
1363 }
1364
1365 static u_int
1366 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1367 {
1368 static int warned_user;
1369 u_int tags;
1370
1371 tags = 0;
1372 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1373 if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
1374
1375 if (warned_user == 0) {
1376 printf(KERN_WARNING
1377 "aic79xx: WARNING: Insufficient tag_info instances\n"
1378 "aic79xx: for installed controllers. Using defaults\n"
1379 "aic79xx: Please update the aic79xx_tag_info array in\n"
1380 "aic79xx: the aic79xx_osm.c source file.\n");
1381 warned_user++;
1382 }
1383 tags = AHD_MAX_QUEUE;
1384 } else {
1385 adapter_tag_info_t *tag_info;
1386
1387 tag_info = &aic79xx_tag_info[ahd->unit];
1388 tags = tag_info->tag_commands[devinfo->target_offset];
1389 if (tags > AHD_MAX_QUEUE)
1390 tags = AHD_MAX_QUEUE;
1391 }
1392 }
1393 return (tags);
1394 }
1395
1396 /*
1397 * Determines the queue depth for a given device.
1398 */
1399 static void
1400 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1401 {
1402 struct ahd_devinfo devinfo;
1403 u_int tags;
1404 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1405
1406 ahd_compile_devinfo(&devinfo,
1407 ahd->our_id,
1408 sdev->sdev_target->id, sdev->lun,
1409 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1410 ROLE_INITIATOR);
1411 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1412 if (tags != 0 && sdev->tagged_supported != 0) {
1413
1414 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
1415 ahd_print_devinfo(ahd, &devinfo);
1416 printf("Tagged Queuing enabled. Depth %d\n", tags);
1417 } else {
1418 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
1419 }
1420 }
1421
1422 static int
1423 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1424 struct scsi_cmnd *cmd)
1425 {
1426 struct scb *scb;
1427 struct hardware_scb *hscb;
1428 struct ahd_initiator_tinfo *tinfo;
1429 struct ahd_tmode_tstate *tstate;
1430 u_int col_idx;
1431 uint16_t mask;
1432 unsigned long flags;
1433
1434 ahd_lock(ahd, &flags);
1435
1436 /*
1437 * Get an scb to use.
1438 */
1439 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1440 cmd->device->id, &tstate);
1441 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1442 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1443 col_idx = AHD_NEVER_COL_IDX;
1444 } else {
1445 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1446 cmd->device->lun);
1447 }
1448 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1449 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1450 ahd_unlock(ahd, &flags);
1451 return SCSI_MLQUEUE_HOST_BUSY;
1452 }
1453
1454 scb->io_ctx = cmd;
1455 scb->platform_data->dev = dev;
1456 hscb = scb->hscb;
1457 cmd->host_scribble = (char *)scb;
1458
1459 /*
1460 * Fill out basics of the HSCB.
1461 */
1462 hscb->control = 0;
1463 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1464 hscb->lun = cmd->device->lun;
1465 scb->hscb->task_management = 0;
1466 mask = SCB_GET_TARGET_MASK(ahd, scb);
1467
1468 if ((ahd->user_discenable & mask) != 0)
1469 hscb->control |= DISCENB;
1470
1471 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1472 scb->flags |= SCB_PACKETIZED;
1473
1474 if ((tstate->auto_negotiate & mask) != 0) {
1475 scb->flags |= SCB_AUTO_NEGOTIATE;
1476 scb->hscb->control |= MK_MESSAGE;
1477 } else if (cmd->cmnd[0] == INQUIRY
1478 && (tinfo->curr.offset != 0
1479 || tinfo->curr.width != MSG_EXT_WDTR_BUS_8_BIT
1480 || tinfo->curr.ppr_options != 0)
1481 && (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ)==0) {
1482 /*
1483 * The SCSI spec requires inquiry
1484 * commands to complete without
1485 * reporting unit attention conditions.
1486 * Because of this, an inquiry command
1487 * that occurs just after a device is
1488 * reset will result in a data phase
1489 * with mismatched negotiated rates.
1490 * The core already forces a renegotiation
1491 * for reset events that are visible to
1492 * our controller or that we initiate,
1493 * but a third party device reset or a
1494 * hot-plug insertion can still cause this
1495 * issue. Therefore, we force a re-negotiation
1496 * for every inquiry command unless we
1497 * are async.
1498 */
1499 scb->flags |= SCB_NEGOTIATE;
1500 scb->hscb->control |= MK_MESSAGE;
1501 }
1502
1503 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1504 int msg_bytes;
1505 uint8_t tag_msgs[2];
1506
1507 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1508 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1509 hscb->control |= tag_msgs[0];
1510 if (tag_msgs[0] == MSG_ORDERED_TASK)
1511 dev->commands_since_idle_or_otag = 0;
1512 } else
1513 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1514 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1515 hscb->control |= MSG_ORDERED_TASK;
1516 dev->commands_since_idle_or_otag = 0;
1517 } else {
1518 hscb->control |= MSG_SIMPLE_TASK;
1519 }
1520 }
1521
1522 hscb->cdb_len = cmd->cmd_len;
1523 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1524
1525 scb->platform_data->xfer_len = 0;
1526 ahd_set_residual(scb, 0);
1527 ahd_set_sense_residual(scb, 0);
1528 scb->sg_count = 0;
1529 if (cmd->use_sg != 0) {
1530 void *sg;
1531 struct scatterlist *cur_seg;
1532 u_int nseg;
1533 int dir;
1534
1535 cur_seg = (struct scatterlist *)cmd->request_buffer;
1536 dir = cmd->sc_data_direction;
1537 nseg = pci_map_sg(ahd->dev_softc, cur_seg,
1538 cmd->use_sg, dir);
1539 scb->platform_data->xfer_len = 0;
1540 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
1541 dma_addr_t addr;
1542 bus_size_t len;
1543
1544 addr = sg_dma_address(cur_seg);
1545 len = sg_dma_len(cur_seg);
1546 scb->platform_data->xfer_len += len;
1547 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1548 /*last*/nseg == 1);
1549 }
1550 } else if (cmd->request_bufflen != 0) {
1551 void *sg;
1552 dma_addr_t addr;
1553 int dir;
1554
1555 sg = scb->sg_list;
1556 dir = cmd->sc_data_direction;
1557 addr = pci_map_single(ahd->dev_softc,
1558 cmd->request_buffer,
1559 cmd->request_bufflen, dir);
1560 scb->platform_data->xfer_len = cmd->request_bufflen;
1561 scb->platform_data->buf_busaddr = addr;
1562 sg = ahd_sg_setup(ahd, scb, sg, addr,
1563 cmd->request_bufflen, /*last*/TRUE);
1564 }
1565
1566 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1567 dev->openings--;
1568 dev->active++;
1569 dev->commands_issued++;
1570
1571 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1572 dev->commands_since_idle_or_otag++;
1573 scb->flags |= SCB_ACTIVE;
1574 ahd_queue_scb(ahd, scb);
1575
1576 ahd_unlock(ahd, &flags);
1577
1578 return 0;
1579 }
1580
1581 /*
1582 * SCSI controller interrupt handler.
1583 */
1584 irqreturn_t
1585 ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1586 {
1587 struct ahd_softc *ahd;
1588 u_long flags;
1589 int ours;
1590
1591 ahd = (struct ahd_softc *) dev_id;
1592 ahd_lock(ahd, &flags);
1593 ours = ahd_intr(ahd);
1594 ahd_unlock(ahd, &flags);
1595 return IRQ_RETVAL(ours);
1596 }
1597
1598 void
1599 ahd_platform_flushwork(struct ahd_softc *ahd)
1600 {
1601
1602 }
1603
1604 void
1605 ahd_send_async(struct ahd_softc *ahd, char channel,
1606 u_int target, u_int lun, ac_code code, void *arg)
1607 {
1608 switch (code) {
1609 case AC_TRANSFER_NEG:
1610 {
1611 char buf[80];
1612 struct scsi_target *starget;
1613 struct info_str info;
1614 struct ahd_initiator_tinfo *tinfo;
1615 struct ahd_tmode_tstate *tstate;
1616 unsigned int target_ppr_options;
1617
1618 BUG_ON(target == CAM_TARGET_WILDCARD);
1619
1620 info.buffer = buf;
1621 info.length = sizeof(buf);
1622 info.offset = 0;
1623 info.pos = 0;
1624 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1625 target, &tstate);
1626
1627 /*
1628 * Don't bother reporting results while
1629 * negotiations are still pending.
1630 */
1631 if (tinfo->curr.period != tinfo->goal.period
1632 || tinfo->curr.width != tinfo->goal.width
1633 || tinfo->curr.offset != tinfo->goal.offset
1634 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1635 if (bootverbose == 0)
1636 break;
1637
1638 /*
1639 * Don't bother reporting results that
1640 * are identical to those last reported.
1641 */
1642 starget = ahd->platform_data->starget[target];
1643 if (starget == NULL)
1644 break;
1645
1646 target_ppr_options =
1647 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1648 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1649 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1650 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1651 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1652 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1653 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1654 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1655
1656 if (tinfo->curr.period == spi_period(starget)
1657 && tinfo->curr.width == spi_width(starget)
1658 && tinfo->curr.offset == spi_offset(starget)
1659 && tinfo->curr.ppr_options == target_ppr_options)
1660 if (bootverbose == 0)
1661 break;
1662
1663 spi_period(starget) = tinfo->curr.period;
1664 spi_width(starget) = tinfo->curr.width;
1665 spi_offset(starget) = tinfo->curr.offset;
1666 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1667 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1668 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1669 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1670 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1671 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1672 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1673 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1674 spi_display_xfer_agreement(starget);
1675 break;
1676 }
1677 case AC_SENT_BDR:
1678 {
1679 WARN_ON(lun != CAM_LUN_WILDCARD);
1680 scsi_report_device_reset(ahd->platform_data->host,
1681 channel - 'A', target);
1682 break;
1683 }
1684 case AC_BUS_RESET:
1685 if (ahd->platform_data->host != NULL) {
1686 scsi_report_bus_reset(ahd->platform_data->host,
1687 channel - 'A');
1688 }
1689 break;
1690 default:
1691 panic("ahd_send_async: Unexpected async event");
1692 }
1693 }
1694
1695 /*
1696 * Calls the higher level scsi done function and frees the scb.
1697 */
1698 void
1699 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1700 {
1701 struct scsi_cmnd *cmd;
1702 struct ahd_linux_device *dev;
1703
1704 if ((scb->flags & SCB_ACTIVE) == 0) {
1705 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1706 ahd_dump_card_state(ahd);
1707 panic("Stopping for safety");
1708 }
1709 LIST_REMOVE(scb, pending_links);
1710 cmd = scb->io_ctx;
1711 dev = scb->platform_data->dev;
1712 dev->active--;
1713 dev->openings++;
1714 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1715 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1716 dev->qfrozen--;
1717 }
1718 ahd_linux_unmap_scb(ahd, scb);
1719
1720 /*
1721 * Guard against stale sense data.
1722 * The Linux mid-layer assumes that sense
1723 * was retrieved anytime the first byte of
1724 * the sense buffer looks "sane".
1725 */
1726 cmd->sense_buffer[0] = 0;
1727 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1728 uint32_t amount_xferred;
1729
1730 amount_xferred =
1731 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1732 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1733 #ifdef AHD_DEBUG
1734 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1735 ahd_print_path(ahd, scb);
1736 printf("Set CAM_UNCOR_PARITY\n");
1737 }
1738 #endif
1739 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1740 #ifdef AHD_REPORT_UNDERFLOWS
1741 /*
1742 * This code is disabled by default as some
1743 * clients of the SCSI system do not properly
1744 * initialize the underflow parameter. This
1745 * results in spurious termination of commands
1746 * that complete as expected (e.g. underflow is
1747 * allowed as command can return variable amounts
1748 * of data.
1749 */
1750 } else if (amount_xferred < scb->io_ctx->underflow) {
1751 u_int i;
1752
1753 ahd_print_path(ahd, scb);
1754 printf("CDB:");
1755 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1756 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1757 printf("\n");
1758 ahd_print_path(ahd, scb);
1759 printf("Saw underflow (%ld of %ld bytes). "
1760 "Treated as error\n",
1761 ahd_get_residual(scb),
1762 ahd_get_transfer_length(scb));
1763 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1764 #endif
1765 } else {
1766 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1767 }
1768 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1769 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1770 }
1771
1772 if (dev->openings == 1
1773 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1774 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1775 dev->tag_success_count++;
1776 /*
1777 * Some devices deal with temporary internal resource
1778 * shortages by returning queue full. When the queue
1779 * full occurrs, we throttle back. Slowly try to get
1780 * back to our previous queue depth.
1781 */
1782 if ((dev->openings + dev->active) < dev->maxtags
1783 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1784 dev->tag_success_count = 0;
1785 dev->openings++;
1786 }
1787
1788 if (dev->active == 0)
1789 dev->commands_since_idle_or_otag = 0;
1790
1791 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1792 printf("Recovery SCB completes\n");
1793 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1794 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1795 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1796
1797 if (ahd->platform_data->eh_done)
1798 complete(ahd->platform_data->eh_done);
1799 }
1800
1801 ahd_free_scb(ahd, scb);
1802 ahd_linux_queue_cmd_complete(ahd, cmd);
1803 }
1804
1805 static void
1806 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1807 struct scsi_device *sdev, struct scb *scb)
1808 {
1809 struct ahd_devinfo devinfo;
1810 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1811
1812 ahd_compile_devinfo(&devinfo,
1813 ahd->our_id,
1814 sdev->sdev_target->id, sdev->lun,
1815 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1816 ROLE_INITIATOR);
1817
1818 /*
1819 * We don't currently trust the mid-layer to
1820 * properly deal with queue full or busy. So,
1821 * when one occurs, we tell the mid-layer to
1822 * unconditionally requeue the command to us
1823 * so that we can retry it ourselves. We also
1824 * implement our own throttling mechanism so
1825 * we don't clobber the device with too many
1826 * commands.
1827 */
1828 switch (ahd_get_scsi_status(scb)) {
1829 default:
1830 break;
1831 case SCSI_STATUS_CHECK_COND:
1832 case SCSI_STATUS_CMD_TERMINATED:
1833 {
1834 struct scsi_cmnd *cmd;
1835
1836 /*
1837 * Copy sense information to the OS's cmd
1838 * structure if it is available.
1839 */
1840 cmd = scb->io_ctx;
1841 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1842 struct scsi_status_iu_header *siu;
1843 u_int sense_size;
1844 u_int sense_offset;
1845
1846 if (scb->flags & SCB_SENSE) {
1847 sense_size = MIN(sizeof(struct scsi_sense_data)
1848 - ahd_get_sense_residual(scb),
1849 sizeof(cmd->sense_buffer));
1850 sense_offset = 0;
1851 } else {
1852 /*
1853 * Copy only the sense data into the provided
1854 * buffer.
1855 */
1856 siu = (struct scsi_status_iu_header *)
1857 scb->sense_data;
1858 sense_size = MIN(scsi_4btoul(siu->sense_length),
1859 sizeof(cmd->sense_buffer));
1860 sense_offset = SIU_SENSE_OFFSET(siu);
1861 }
1862
1863 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
1864 memcpy(cmd->sense_buffer,
1865 ahd_get_sense_buf(ahd, scb)
1866 + sense_offset, sense_size);
1867 cmd->result |= (DRIVER_SENSE << 24);
1868
1869 #ifdef AHD_DEBUG
1870 if (ahd_debug & AHD_SHOW_SENSE) {
1871 int i;
1872
1873 printf("Copied %d bytes of sense data at %d:",
1874 sense_size, sense_offset);
1875 for (i = 0; i < sense_size; i++) {
1876 if ((i & 0xF) == 0)
1877 printf("\n");
1878 printf("0x%x ", cmd->sense_buffer[i]);
1879 }
1880 printf("\n");
1881 }
1882 #endif
1883 }
1884 break;
1885 }
1886 case SCSI_STATUS_QUEUE_FULL:
1887 /*
1888 * By the time the core driver has returned this
1889 * command, all other commands that were queued
1890 * to us but not the device have been returned.
1891 * This ensures that dev->active is equal to
1892 * the number of commands actually queued to
1893 * the device.
1894 */
1895 dev->tag_success_count = 0;
1896 if (dev->active != 0) {
1897 /*
1898 * Drop our opening count to the number
1899 * of commands currently outstanding.
1900 */
1901 dev->openings = 0;
1902 #ifdef AHD_DEBUG
1903 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1904 ahd_print_path(ahd, scb);
1905 printf("Dropping tag count to %d\n",
1906 dev->active);
1907 }
1908 #endif
1909 if (dev->active == dev->tags_on_last_queuefull) {
1910
1911 dev->last_queuefull_same_count++;
1912 /*
1913 * If we repeatedly see a queue full
1914 * at the same queue depth, this
1915 * device has a fixed number of tag
1916 * slots. Lock in this tag depth
1917 * so we stop seeing queue fulls from
1918 * this device.
1919 */
1920 if (dev->last_queuefull_same_count
1921 == AHD_LOCK_TAGS_COUNT) {
1922 dev->maxtags = dev->active;
1923 ahd_print_path(ahd, scb);
1924 printf("Locking max tag count at %d\n",
1925 dev->active);
1926 }
1927 } else {
1928 dev->tags_on_last_queuefull = dev->active;
1929 dev->last_queuefull_same_count = 0;
1930 }
1931 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1932 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1933 ahd_platform_set_tags(ahd, &devinfo,
1934 (dev->flags & AHD_DEV_Q_BASIC)
1935 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1936 break;
1937 }
1938 /*
1939 * Drop down to a single opening, and treat this
1940 * as if the target returned BUSY SCSI status.
1941 */
1942 dev->openings = 1;
1943 ahd_platform_set_tags(ahd, &devinfo,
1944 (dev->flags & AHD_DEV_Q_BASIC)
1945 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1946 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
1947 }
1948 }
1949
1950 static void
1951 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
1952 {
1953 /*
1954 * Map CAM error codes into Linux Error codes. We
1955 * avoid the conversion so that the DV code has the
1956 * full error information available when making
1957 * state change decisions.
1958 */
1959 {
1960 uint32_t status;
1961 u_int new_status;
1962
1963 status = ahd_cmd_get_transaction_status(cmd);
1964 switch (status) {
1965 case CAM_REQ_INPROG:
1966 case CAM_REQ_CMP:
1967 case CAM_SCSI_STATUS_ERROR:
1968 new_status = DID_OK;
1969 break;
1970 case CAM_REQ_ABORTED:
1971 new_status = DID_ABORT;
1972 break;
1973 case CAM_BUSY:
1974 new_status = DID_BUS_BUSY;
1975 break;
1976 case CAM_REQ_INVALID:
1977 case CAM_PATH_INVALID:
1978 new_status = DID_BAD_TARGET;
1979 break;
1980 case CAM_SEL_TIMEOUT:
1981 new_status = DID_NO_CONNECT;
1982 break;
1983 case CAM_SCSI_BUS_RESET:
1984 case CAM_BDR_SENT:
1985 new_status = DID_RESET;
1986 break;
1987 case CAM_UNCOR_PARITY:
1988 new_status = DID_PARITY;
1989 break;
1990 case CAM_CMD_TIMEOUT:
1991 new_status = DID_TIME_OUT;
1992 break;
1993 case CAM_UA_ABORT:
1994 case CAM_REQ_CMP_ERR:
1995 case CAM_AUTOSENSE_FAIL:
1996 case CAM_NO_HBA:
1997 case CAM_DATA_RUN_ERR:
1998 case CAM_UNEXP_BUSFREE:
1999 case CAM_SEQUENCE_FAIL:
2000 case CAM_CCB_LEN_ERR:
2001 case CAM_PROVIDE_FAIL:
2002 case CAM_REQ_TERMIO:
2003 case CAM_UNREC_HBA_ERROR:
2004 case CAM_REQ_TOO_BIG:
2005 new_status = DID_ERROR;
2006 break;
2007 case CAM_REQUEUE_REQ:
2008 new_status = DID_REQUEUE;
2009 break;
2010 default:
2011 /* We should never get here */
2012 new_status = DID_ERROR;
2013 break;
2014 }
2015
2016 ahd_cmd_set_transaction_status(cmd, new_status);
2017 }
2018
2019 cmd->scsi_done(cmd);
2020 }
2021
2022 void
2023 ahd_freeze_simq(struct ahd_softc *ahd)
2024 {
2025 scsi_block_requests(ahd->platform_data->host);
2026 }
2027
2028 void
2029 ahd_release_simq(struct ahd_softc *ahd)
2030 {
2031 scsi_unblock_requests(ahd->platform_data->host);
2032 }
2033
2034 static int
2035 ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
2036 {
2037 struct ahd_softc *ahd;
2038 struct ahd_linux_device *dev;
2039 struct scb *pending_scb;
2040 u_int saved_scbptr;
2041 u_int active_scbptr;
2042 u_int last_phase;
2043 u_int saved_scsiid;
2044 u_int cdb_byte;
2045 int retval;
2046 int was_paused;
2047 int paused;
2048 int wait;
2049 int disconnected;
2050 int found;
2051 ahd_mode_state saved_modes;
2052 unsigned long flags;
2053
2054 pending_scb = NULL;
2055 paused = FALSE;
2056 wait = FALSE;
2057 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2058
2059 scmd_printk(KERN_INFO, cmd,
2060 "Attempting to queue a%s message:",
2061 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2062
2063 printf("CDB:");
2064 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2065 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2066 printf("\n");
2067
2068 ahd_lock(ahd, &flags);
2069
2070 /*
2071 * First determine if we currently own this command.
2072 * Start by searching the device queue. If not found
2073 * there, check the pending_scb list. If not found
2074 * at all, and the system wanted us to just abort the
2075 * command, return success.
2076 */
2077 dev = scsi_transport_device_data(cmd->device);
2078
2079 if (dev == NULL) {
2080 /*
2081 * No target device for this command exists,
2082 * so we must not still own the command.
2083 */
2084 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2085 retval = SUCCESS;
2086 goto no_cmd;
2087 }
2088
2089 /*
2090 * See if we can find a matching cmd in the pending list.
2091 */
2092 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2093 if (pending_scb->io_ctx == cmd)
2094 break;
2095 }
2096
2097 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2098
2099 /* Any SCB for this device will do for a target reset */
2100 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2101 if (ahd_match_scb(ahd, pending_scb,
2102 scmd_id(cmd),
2103 scmd_channel(cmd) + 'A',
2104 CAM_LUN_WILDCARD,
2105 SCB_LIST_NULL, ROLE_INITIATOR))
2106 break;
2107 }
2108 }
2109
2110 if (pending_scb == NULL) {
2111 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2112 goto no_cmd;
2113 }
2114
2115 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2116 /*
2117 * We can't queue two recovery actions using the same SCB
2118 */
2119 retval = FAILED;
2120 goto done;
2121 }
2122
2123 /*
2124 * Ensure that the card doesn't do anything
2125 * behind our back. Also make sure that we
2126 * didn't "just" miss an interrupt that would
2127 * affect this cmd.
2128 */
2129 was_paused = ahd_is_paused(ahd);
2130 ahd_pause_and_flushwork(ahd);
2131 paused = TRUE;
2132
2133 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2134 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2135 goto no_cmd;
2136 }
2137
2138 printf("%s: At time of recovery, card was %spaused\n",
2139 ahd_name(ahd), was_paused ? "" : "not ");
2140 ahd_dump_card_state(ahd);
2141
2142 disconnected = TRUE;
2143 if (flag == SCB_ABORT) {
2144 if (ahd_search_qinfifo(ahd, cmd->device->id,
2145 cmd->device->channel + 'A',
2146 cmd->device->lun,
2147 pending_scb->hscb->tag,
2148 ROLE_INITIATOR, CAM_REQ_ABORTED,
2149 SEARCH_COMPLETE) > 0) {
2150 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2151 ahd_name(ahd), cmd->device->channel,
2152 cmd->device->id, cmd->device->lun);
2153 retval = SUCCESS;
2154 goto done;
2155 }
2156 } else if (ahd_search_qinfifo(ahd, cmd->device->id,
2157 cmd->device->channel + 'A',
2158 cmd->device->lun, pending_scb->hscb->tag,
2159 ROLE_INITIATOR, /*status*/0,
2160 SEARCH_COUNT) > 0) {
2161 disconnected = FALSE;
2162 }
2163
2164 saved_modes = ahd_save_modes(ahd);
2165 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2166 last_phase = ahd_inb(ahd, LASTPHASE);
2167 saved_scbptr = ahd_get_scbptr(ahd);
2168 active_scbptr = saved_scbptr;
2169 if (disconnected && ((last_phase != P_BUSFREE) ||
2170 (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0)) {
2171 struct scb *bus_scb;
2172
2173 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2174 if (bus_scb == pending_scb)
2175 disconnected = FALSE;
2176 else if (flag != SCB_ABORT
2177 && ahd_inb(ahd, SAVED_SCSIID) == pending_scb->hscb->scsiid
2178 && ahd_inb(ahd, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2179 disconnected = FALSE;
2180 }
2181
2182 /*
2183 * At this point, pending_scb is the scb associated with the
2184 * passed in command. That command is currently active on the
2185 * bus or is in the disconnected state.
2186 */
2187 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2188 if (SCB_GET_TAG(pending_scb) == active_scbptr
2189 || (flag == SCB_DEVICE_RESET
2190 && SCSIID_TARGET(ahd, saved_scsiid) == scmd_id(cmd))) {
2191
2192 /*
2193 * We're active on the bus, so assert ATN
2194 * and hope that the target responds.
2195 */
2196 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2197 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_DEVICE_RESET;
2198 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2199 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2200 scmd_printk(KERN_INFO, cmd, "BDR message in message buffer\n");
2201 wait = TRUE;
2202 } else if (last_phase != P_BUSFREE
2203 && ahd_inb(ahd, SCSIPHASE) == 0) {
2204 /*
2205 * SCB is not identified, there
2206 * is no pending REQ, and the sequencer
2207 * has not seen a busfree. Looks like
2208 * a stuck connection waiting to
2209 * go busfree. Reset the bus.
2210 */
2211 found = ahd_reset_channel(ahd, cmd->device->channel + 'A',
2212 /*Initiate Reset*/TRUE);
2213 printf("%s: Issued Channel %c Bus Reset. "
2214 "%d SCBs aborted\n", ahd_name(ahd),
2215 cmd->device->channel + 'A', found);
2216 } else if (disconnected) {
2217
2218 /*
2219 * Actually re-queue this SCB in an attempt
2220 * to select the device before it reconnects.
2221 */
2222 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2223 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2224 pending_scb->hscb->cdb_len = 0;
2225 pending_scb->hscb->task_attribute = 0;
2226 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2227
2228 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2229 /*
2230 * Mark the SCB has having an outstanding
2231 * task management function. Should the command
2232 * complete normally before the task management
2233 * function can be sent, the host will be notified
2234 * to abort our requeued SCB.
2235 */
2236 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2237 pending_scb->hscb->task_management);
2238 } else {
2239 /*
2240 * If non-packetized, set the MK_MESSAGE control
2241 * bit indicating that we desire to send a message.
2242 * We also set the disconnected flag since there is
2243 * no guarantee that our SCB control byte matches
2244 * the version on the card. We don't want the
2245 * sequencer to abort the command thinking an
2246 * unsolicited reselection occurred.
2247 */
2248 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2249
2250 /*
2251 * The sequencer will never re-reference the
2252 * in-core SCB. To make sure we are notified
2253 * during reslection, set the MK_MESSAGE flag in
2254 * the card's copy of the SCB.
2255 */
2256 ahd_outb(ahd, SCB_CONTROL,
2257 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2258 }
2259
2260 /*
2261 * Clear out any entries in the QINFIFO first
2262 * so we are the next SCB for this target
2263 * to run.
2264 */
2265 ahd_search_qinfifo(ahd, cmd->device->id,
2266 cmd->device->channel + 'A', cmd->device->lun,
2267 SCB_LIST_NULL, ROLE_INITIATOR,
2268 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2269 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2270 ahd_set_scbptr(ahd, saved_scbptr);
2271 ahd_print_path(ahd, pending_scb);
2272 printf("Device is disconnected, re-queuing SCB\n");
2273 wait = TRUE;
2274 } else {
2275 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2276 retval = FAILED;
2277 goto done;
2278 }
2279
2280 no_cmd:
2281 /*
2282 * Our assumption is that if we don't have the command, no
2283 * recovery action was required, so we return success. Again,
2284 * the semantics of the mid-layer recovery engine are not
2285 * well defined, so this may change in time.
2286 */
2287 retval = SUCCESS;
2288 done:
2289 if (paused)
2290 ahd_unpause(ahd);
2291 if (wait) {
2292 DECLARE_COMPLETION(done);
2293
2294 ahd->platform_data->eh_done = &done;
2295 ahd_unlock(ahd, &flags);
2296
2297 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
2298 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2299 ahd_lock(ahd, &flags);
2300 ahd->platform_data->eh_done = NULL;
2301 ahd_unlock(ahd, &flags);
2302 printf("%s: Timer Expired (active %d)\n",
2303 ahd_name(ahd), dev->active);
2304 retval = FAILED;
2305 }
2306 printf("Recovery code awake\n");
2307 } else
2308 ahd_unlock(ahd, &flags);
2309
2310 if (retval != SUCCESS)
2311 printf("%s: Command abort returning 0x%x\n",
2312 ahd_name(ahd), retval);
2313
2314 return retval;
2315 }
2316
2317 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2318 {
2319 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2320 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2321 struct ahd_devinfo devinfo;
2322 unsigned long flags;
2323
2324 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2325 starget->channel + 'A', ROLE_INITIATOR);
2326 ahd_lock(ahd, &flags);
2327 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2328 ahd_unlock(ahd, &flags);
2329 }
2330
2331 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2332 {
2333 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2334 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2335 struct ahd_tmode_tstate *tstate;
2336 struct ahd_initiator_tinfo *tinfo
2337 = ahd_fetch_transinfo(ahd,
2338 starget->channel + 'A',
2339 shost->this_id, starget->id, &tstate);
2340 struct ahd_devinfo devinfo;
2341 unsigned int ppr_options = tinfo->goal.ppr_options;
2342 unsigned int dt;
2343 unsigned long flags;
2344 unsigned long offset = tinfo->goal.offset;
2345
2346 #ifdef AHD_DEBUG
2347 if ((ahd_debug & AHD_SHOW_DV) != 0)
2348 printf("%s: set period to %d\n", ahd_name(ahd), period);
2349 #endif
2350 if (offset == 0)
2351 offset = MAX_OFFSET;
2352
2353 if (period < 8)
2354 period = 8;
2355 if (period < 10) {
2356 ppr_options |= MSG_EXT_PPR_DT_REQ;
2357 if (period == 8)
2358 ppr_options |= MSG_EXT_PPR_IU_REQ;
2359 }
2360
2361 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2362
2363 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2364 starget->channel + 'A', ROLE_INITIATOR);
2365
2366 /* all PPR requests apart from QAS require wide transfers */
2367 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2368 if (spi_width(starget) == 0)
2369 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2370 }
2371
2372 ahd_find_syncrate(ahd, &period, &ppr_options,
2373 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2374
2375 ahd_lock(ahd, &flags);
2376 ahd_set_syncrate(ahd, &devinfo, period, offset,
2377 ppr_options, AHD_TRANS_GOAL, FALSE);
2378 ahd_unlock(ahd, &flags);
2379 }
2380
2381 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2382 {
2383 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2384 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2385 struct ahd_tmode_tstate *tstate;
2386 struct ahd_initiator_tinfo *tinfo
2387 = ahd_fetch_transinfo(ahd,
2388 starget->channel + 'A',
2389 shost->this_id, starget->id, &tstate);
2390 struct ahd_devinfo devinfo;
2391 unsigned int ppr_options = 0;
2392 unsigned int period = 0;
2393 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2394 unsigned long flags;
2395
2396 #ifdef AHD_DEBUG
2397 if ((ahd_debug & AHD_SHOW_DV) != 0)
2398 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2399 #endif
2400
2401 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2402 starget->channel + 'A', ROLE_INITIATOR);
2403 if (offset != 0) {
2404 period = tinfo->goal.period;
2405 ppr_options = tinfo->goal.ppr_options;
2406 ahd_find_syncrate(ahd, &period, &ppr_options,
2407 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2408 }
2409
2410 ahd_lock(ahd, &flags);
2411 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2412 AHD_TRANS_GOAL, FALSE);
2413 ahd_unlock(ahd, &flags);
2414 }
2415
2416 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2417 {
2418 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2419 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2420 struct ahd_tmode_tstate *tstate;
2421 struct ahd_initiator_tinfo *tinfo
2422 = ahd_fetch_transinfo(ahd,
2423 starget->channel + 'A',
2424 shost->this_id, starget->id, &tstate);
2425 struct ahd_devinfo devinfo;
2426 unsigned int ppr_options = tinfo->goal.ppr_options
2427 & ~MSG_EXT_PPR_DT_REQ;
2428 unsigned int period = tinfo->goal.period;
2429 unsigned int width = tinfo->goal.width;
2430 unsigned long flags;
2431
2432 #ifdef AHD_DEBUG
2433 if ((ahd_debug & AHD_SHOW_DV) != 0)
2434 printf("%s: %s DT\n", ahd_name(ahd),
2435 dt ? "enabling" : "disabling");
2436 #endif
2437 if (dt) {
2438 ppr_options |= MSG_EXT_PPR_DT_REQ;
2439 if (!width)
2440 ahd_linux_set_width(starget, 1);
2441 } else {
2442 if (period <= 9)
2443 period = 10; /* If resetting DT, period must be >= 25ns */
2444 /* IU is invalid without DT set */
2445 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2446 }
2447 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2448 starget->channel + 'A', ROLE_INITIATOR);
2449 ahd_find_syncrate(ahd, &period, &ppr_options,
2450 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2451
2452 ahd_lock(ahd, &flags);
2453 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2454 ppr_options, AHD_TRANS_GOAL, FALSE);
2455 ahd_unlock(ahd, &flags);
2456 }
2457
2458 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2459 {
2460 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2461 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2462 struct ahd_tmode_tstate *tstate;
2463 struct ahd_initiator_tinfo *tinfo
2464 = ahd_fetch_transinfo(ahd,
2465 starget->channel + 'A',
2466 shost->this_id, starget->id, &tstate);
2467 struct ahd_devinfo devinfo;
2468 unsigned int ppr_options = tinfo->goal.ppr_options
2469 & ~MSG_EXT_PPR_QAS_REQ;
2470 unsigned int period = tinfo->goal.period;
2471 unsigned int dt;
2472 unsigned long flags;
2473
2474 #ifdef AHD_DEBUG
2475 if ((ahd_debug & AHD_SHOW_DV) != 0)
2476 printf("%s: %s QAS\n", ahd_name(ahd),
2477 qas ? "enabling" : "disabling");
2478 #endif
2479
2480 if (qas) {
2481 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2482 }
2483
2484 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2485
2486 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2487 starget->channel + 'A', ROLE_INITIATOR);
2488 ahd_find_syncrate(ahd, &period, &ppr_options,
2489 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2490
2491 ahd_lock(ahd, &flags);
2492 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2493 ppr_options, AHD_TRANS_GOAL, FALSE);
2494 ahd_unlock(ahd, &flags);
2495 }
2496
2497 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2498 {
2499 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2500 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2501 struct ahd_tmode_tstate *tstate;
2502 struct ahd_initiator_tinfo *tinfo
2503 = ahd_fetch_transinfo(ahd,
2504 starget->channel + 'A',
2505 shost->this_id, starget->id, &tstate);
2506 struct ahd_devinfo devinfo;
2507 unsigned int ppr_options = tinfo->goal.ppr_options
2508 & ~MSG_EXT_PPR_IU_REQ;
2509 unsigned int period = tinfo->goal.period;
2510 unsigned int dt;
2511 unsigned long flags;
2512
2513 #ifdef AHD_DEBUG
2514 if ((ahd_debug & AHD_SHOW_DV) != 0)
2515 printf("%s: %s IU\n", ahd_name(ahd),
2516 iu ? "enabling" : "disabling");
2517 #endif
2518
2519 if (iu) {
2520 ppr_options |= MSG_EXT_PPR_IU_REQ;
2521 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2522 }
2523
2524 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2525
2526 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2527 starget->channel + 'A', ROLE_INITIATOR);
2528 ahd_find_syncrate(ahd, &period, &ppr_options,
2529 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2530
2531 ahd_lock(ahd, &flags);
2532 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2533 ppr_options, AHD_TRANS_GOAL, FALSE);
2534 ahd_unlock(ahd, &flags);
2535 }
2536
2537 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2538 {
2539 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2540 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2541 struct ahd_tmode_tstate *tstate;
2542 struct ahd_initiator_tinfo *tinfo
2543 = ahd_fetch_transinfo(ahd,
2544 starget->channel + 'A',
2545 shost->this_id, starget->id, &tstate);
2546 struct ahd_devinfo devinfo;
2547 unsigned int ppr_options = tinfo->goal.ppr_options
2548 & ~MSG_EXT_PPR_RD_STRM;
2549 unsigned int period = tinfo->goal.period;
2550 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2551 unsigned long flags;
2552
2553 #ifdef AHD_DEBUG
2554 if ((ahd_debug & AHD_SHOW_DV) != 0)
2555 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2556 rdstrm ? "enabling" : "disabling");
2557 #endif
2558
2559 if (rdstrm)
2560 ppr_options |= MSG_EXT_PPR_RD_STRM;
2561
2562 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2563 starget->channel + 'A', ROLE_INITIATOR);
2564 ahd_find_syncrate(ahd, &period, &ppr_options,
2565 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2566
2567 ahd_lock(ahd, &flags);
2568 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2569 ppr_options, AHD_TRANS_GOAL, FALSE);
2570 ahd_unlock(ahd, &flags);
2571 }
2572
2573 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2574 {
2575 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2576 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2577 struct ahd_tmode_tstate *tstate;
2578 struct ahd_initiator_tinfo *tinfo
2579 = ahd_fetch_transinfo(ahd,
2580 starget->channel + 'A',
2581 shost->this_id, starget->id, &tstate);
2582 struct ahd_devinfo devinfo;
2583 unsigned int ppr_options = tinfo->goal.ppr_options
2584 & ~MSG_EXT_PPR_WR_FLOW;
2585 unsigned int period = tinfo->goal.period;
2586 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2587 unsigned long flags;
2588
2589 #ifdef AHD_DEBUG
2590 if ((ahd_debug & AHD_SHOW_DV) != 0)
2591 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2592 wrflow ? "enabling" : "disabling");
2593 #endif
2594
2595 if (wrflow)
2596 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2597
2598 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2599 starget->channel + 'A', ROLE_INITIATOR);
2600 ahd_find_syncrate(ahd, &period, &ppr_options,
2601 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2602
2603 ahd_lock(ahd, &flags);
2604 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2605 ppr_options, AHD_TRANS_GOAL, FALSE);
2606 ahd_unlock(ahd, &flags);
2607 }
2608
2609 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2610 {
2611 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2612 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2613 struct ahd_tmode_tstate *tstate;
2614 struct ahd_initiator_tinfo *tinfo
2615 = ahd_fetch_transinfo(ahd,
2616 starget->channel + 'A',
2617 shost->this_id, starget->id, &tstate);
2618 struct ahd_devinfo devinfo;
2619 unsigned int ppr_options = tinfo->goal.ppr_options
2620 & ~MSG_EXT_PPR_RTI;
2621 unsigned int period = tinfo->goal.period;
2622 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2623 unsigned long flags;
2624
2625 if ((ahd->features & AHD_RTI) == 0) {
2626 #ifdef AHD_DEBUG
2627 if ((ahd_debug & AHD_SHOW_DV) != 0)
2628 printf("%s: RTI not available\n", ahd_name(ahd));
2629 #endif
2630 return;
2631 }
2632
2633 #ifdef AHD_DEBUG
2634 if ((ahd_debug & AHD_SHOW_DV) != 0)
2635 printf("%s: %s RTI\n", ahd_name(ahd),
2636 rti ? "enabling" : "disabling");
2637 #endif
2638
2639 if (rti)
2640 ppr_options |= MSG_EXT_PPR_RTI;
2641
2642 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2643 starget->channel + 'A', ROLE_INITIATOR);
2644 ahd_find_syncrate(ahd, &period, &ppr_options,
2645 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2646
2647 ahd_lock(ahd, &flags);
2648 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2649 ppr_options, AHD_TRANS_GOAL, FALSE);
2650 ahd_unlock(ahd, &flags);
2651 }
2652
2653 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2654 {
2655 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2656 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2657 struct ahd_tmode_tstate *tstate;
2658 struct ahd_initiator_tinfo *tinfo
2659 = ahd_fetch_transinfo(ahd,
2660 starget->channel + 'A',
2661 shost->this_id, starget->id, &tstate);
2662 struct ahd_devinfo devinfo;
2663 unsigned int ppr_options = tinfo->goal.ppr_options
2664 & ~MSG_EXT_PPR_PCOMP_EN;
2665 unsigned int period = tinfo->goal.period;
2666 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2667 unsigned long flags;
2668
2669 #ifdef AHD_DEBUG
2670 if ((ahd_debug & AHD_SHOW_DV) != 0)
2671 printf("%s: %s Precompensation\n", ahd_name(ahd),
2672 pcomp ? "Enable" : "Disable");
2673 #endif
2674
2675 if (pcomp)
2676 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2677
2678 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2679 starget->channel + 'A', ROLE_INITIATOR);
2680 ahd_find_syncrate(ahd, &period, &ppr_options,
2681 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2682
2683 ahd_lock(ahd, &flags);
2684 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2685 ppr_options, AHD_TRANS_GOAL, FALSE);
2686 ahd_unlock(ahd, &flags);
2687 }
2688
2689 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2690 {
2691 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2692 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2693 struct ahd_tmode_tstate *tstate;
2694 struct ahd_initiator_tinfo *tinfo
2695 = ahd_fetch_transinfo(ahd,
2696 starget->channel + 'A',
2697 shost->this_id, starget->id, &tstate);
2698 struct ahd_devinfo devinfo;
2699 unsigned int ppr_options = tinfo->goal.ppr_options
2700 & ~MSG_EXT_PPR_HOLD_MCS;
2701 unsigned int period = tinfo->goal.period;
2702 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2703 unsigned long flags;
2704
2705 if (hold)
2706 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2707
2708 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2709 starget->channel + 'A', ROLE_INITIATOR);
2710 ahd_find_syncrate(ahd, &period, &ppr_options,
2711 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2712
2713 ahd_lock(ahd, &flags);
2714 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2715 ppr_options, AHD_TRANS_GOAL, FALSE);
2716 ahd_unlock(ahd, &flags);
2717 }
2718
2719
2720
2721 static struct spi_function_template ahd_linux_transport_functions = {
2722 .set_offset = ahd_linux_set_offset,
2723 .show_offset = 1,
2724 .set_period = ahd_linux_set_period,
2725 .show_period = 1,
2726 .set_width = ahd_linux_set_width,
2727 .show_width = 1,
2728 .set_dt = ahd_linux_set_dt,
2729 .show_dt = 1,
2730 .set_iu = ahd_linux_set_iu,
2731 .show_iu = 1,
2732 .set_qas = ahd_linux_set_qas,
2733 .show_qas = 1,
2734 .set_rd_strm = ahd_linux_set_rd_strm,
2735 .show_rd_strm = 1,
2736 .set_wr_flow = ahd_linux_set_wr_flow,
2737 .show_wr_flow = 1,
2738 .set_rti = ahd_linux_set_rti,
2739 .show_rti = 1,
2740 .set_pcomp_en = ahd_linux_set_pcomp_en,
2741 .show_pcomp_en = 1,
2742 .set_hold_mcs = ahd_linux_set_hold_mcs,
2743 .show_hold_mcs = 1,
2744 };
2745
2746 static int __init
2747 ahd_linux_init(void)
2748 {
2749 int error = 0;
2750
2751 /*
2752 * If we've been passed any parameters, process them now.
2753 */
2754 if (aic79xx)
2755 aic79xx_setup(aic79xx);
2756
2757 ahd_linux_transport_template =
2758 spi_attach_transport(&ahd_linux_transport_functions);
2759 if (!ahd_linux_transport_template)
2760 return -ENODEV;
2761
2762 scsi_transport_reserve_target(ahd_linux_transport_template,
2763 sizeof(struct ahd_linux_target));
2764 scsi_transport_reserve_device(ahd_linux_transport_template,
2765 sizeof(struct ahd_linux_device));
2766
2767 error = ahd_linux_pci_init();
2768 if (error)
2769 spi_release_transport(ahd_linux_transport_template);
2770 return error;
2771 }
2772
2773 static void __exit
2774 ahd_linux_exit(void)
2775 {
2776 ahd_linux_pci_exit();
2777 spi_release_transport(ahd_linux_transport_template);
2778 }
2779
2780 module_init(ahd_linux_init);
2781 module_exit(ahd_linux_exit);
AMDTP streaming driver for the Linux FireWire stack (Juju)