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[SCSI] aic79xx: remove slave_destroy
[linux-2.6/linux-2.6-openrd.git] / drivers / scsi / aic7xxx / aic79xx_osm.c
blobb244c712417923ac088c06f5665e2741b5017e6d
1 /*
2 * Adaptec AIC79xx device driver for Linux.
3 *
4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $
5 *
6 * --------------------------------------------------------------------------
7 * Copyright (c) 1994-2000 Justin T. Gibbs.
8 * Copyright (c) 1997-1999 Doug Ledford
9 * Copyright (c) 2000-2003 Adaptec Inc.
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the following disclaimer,
17 * without modification.
18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19 * substantially similar to the "NO WARRANTY" disclaimer below
20 * ("Disclaimer") and any redistribution must be conditioned upon
21 * including a substantially similar Disclaimer requirement for further
22 * binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
30 *
31 * NO WARRANTY
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGES.
43 */
44
45 #include "aic79xx_osm.h"
46 #include "aic79xx_inline.h"
47 #include <scsi/scsicam.h>
48
49 static struct scsi_transport_template *ahd_linux_transport_template = NULL;
50
51 #include <linux/init.h> /* __setup */
52 #include <linux/mm.h> /* For fetching system memory size */
53 #include <linux/blkdev.h> /* For block_size() */
54 #include <linux/delay.h> /* For ssleep/msleep */
55 #include <linux/device.h>
56
57 /*
58 * Bucket size for counting good commands in between bad ones.
59 */
60 #define AHD_LINUX_ERR_THRESH 1000
61
62 /*
63 * Set this to the delay in seconds after SCSI bus reset.
64 * Note, we honor this only for the initial bus reset.
65 * The scsi error recovery code performs its own bus settle
66 * delay handling for error recovery actions.
67 */
68 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS
69 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
70 #else
71 #define AIC79XX_RESET_DELAY 5000
72 #endif
73
74 /*
75 * To change the default number of tagged transactions allowed per-device,
76 * add a line to the lilo.conf file like:
77 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
78 * which will result in the first four devices on the first two
79 * controllers being set to a tagged queue depth of 32.
80 *
81 * The tag_commands is an array of 16 to allow for wide and twin adapters.
82 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
83 * for channel 1.
84 */
85 typedef struct {
86 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */
87 } adapter_tag_info_t;
88
89 /*
90 * Modify this as you see fit for your system.
91 *
92 * 0 tagged queuing disabled
93 * 1 <= n <= 253 n == max tags ever dispatched.
94 *
95 * The driver will throttle the number of commands dispatched to a
96 * device if it returns queue full. For devices with a fixed maximum
97 * queue depth, the driver will eventually determine this depth and
98 * lock it in (a console message is printed to indicate that a lock
99 * has occurred). On some devices, queue full is returned for a temporary
100 * resource shortage. These devices will return queue full at varying
101 * depths. The driver will throttle back when the queue fulls occur and
102 * attempt to slowly increase the depth over time as the device recovers
103 * from the resource shortage.
104 *
105 * In this example, the first line will disable tagged queueing for all
106 * the devices on the first probed aic79xx adapter.
107 *
108 * The second line enables tagged queueing with 4 commands/LUN for IDs
109 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
110 * driver to attempt to use up to 64 tags for ID 1.
111 *
112 * The third line is the same as the first line.
113 *
114 * The fourth line disables tagged queueing for devices 0 and 3. It
115 * enables tagged queueing for the other IDs, with 16 commands/LUN
116 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
117 * IDs 2, 5-7, and 9-15.
118 */
119
120 /*
121 * NOTE: The below structure is for reference only, the actual structure
122 * to modify in order to change things is just below this comment block.
123 adapter_tag_info_t aic79xx_tag_info[] =
124 {
125 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
126 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
127 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
128 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
129 };
130 */
131
132 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
133 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
134 #else
135 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
136 #endif
137
138 #define AIC79XX_CONFIGED_TAG_COMMANDS { \
139 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
140 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
141 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
142 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
143 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
144 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
145 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
146 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \
147 }
148
149 /*
150 * By default, use the number of commands specified by
151 * the users kernel configuration.
152 */
153 static adapter_tag_info_t aic79xx_tag_info[] =
154 {
155 {AIC79XX_CONFIGED_TAG_COMMANDS},
156 {AIC79XX_CONFIGED_TAG_COMMANDS},
157 {AIC79XX_CONFIGED_TAG_COMMANDS},
158 {AIC79XX_CONFIGED_TAG_COMMANDS},
159 {AIC79XX_CONFIGED_TAG_COMMANDS},
160 {AIC79XX_CONFIGED_TAG_COMMANDS},
161 {AIC79XX_CONFIGED_TAG_COMMANDS},
162 {AIC79XX_CONFIGED_TAG_COMMANDS},
163 {AIC79XX_CONFIGED_TAG_COMMANDS},
164 {AIC79XX_CONFIGED_TAG_COMMANDS},
165 {AIC79XX_CONFIGED_TAG_COMMANDS},
166 {AIC79XX_CONFIGED_TAG_COMMANDS},
167 {AIC79XX_CONFIGED_TAG_COMMANDS},
168 {AIC79XX_CONFIGED_TAG_COMMANDS},
169 {AIC79XX_CONFIGED_TAG_COMMANDS},
170 {AIC79XX_CONFIGED_TAG_COMMANDS}
171 };
172
173 /*
174 * The I/O cell on the chip is very configurable in respect to its analog
175 * characteristics. Set the defaults here; they can be overriden with
176 * the proper insmod parameters.
177 */
178 struct ahd_linux_iocell_opts
179 {
180 uint8_t precomp;
181 uint8_t slewrate;
182 uint8_t amplitude;
183 };
184 #define AIC79XX_DEFAULT_PRECOMP 0xFF
185 #define AIC79XX_DEFAULT_SLEWRATE 0xFF
186 #define AIC79XX_DEFAULT_AMPLITUDE 0xFF
187 #define AIC79XX_DEFAULT_IOOPTS \
188 { \
189 AIC79XX_DEFAULT_PRECOMP, \
190 AIC79XX_DEFAULT_SLEWRATE, \
191 AIC79XX_DEFAULT_AMPLITUDE \
192 }
193 #define AIC79XX_PRECOMP_INDEX 0
194 #define AIC79XX_SLEWRATE_INDEX 1
195 #define AIC79XX_AMPLITUDE_INDEX 2
196 static struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
197 {
198 AIC79XX_DEFAULT_IOOPTS,
199 AIC79XX_DEFAULT_IOOPTS,
200 AIC79XX_DEFAULT_IOOPTS,
201 AIC79XX_DEFAULT_IOOPTS,
202 AIC79XX_DEFAULT_IOOPTS,
203 AIC79XX_DEFAULT_IOOPTS,
204 AIC79XX_DEFAULT_IOOPTS,
205 AIC79XX_DEFAULT_IOOPTS,
206 AIC79XX_DEFAULT_IOOPTS,
207 AIC79XX_DEFAULT_IOOPTS,
208 AIC79XX_DEFAULT_IOOPTS,
209 AIC79XX_DEFAULT_IOOPTS,
210 AIC79XX_DEFAULT_IOOPTS,
211 AIC79XX_DEFAULT_IOOPTS,
212 AIC79XX_DEFAULT_IOOPTS,
213 AIC79XX_DEFAULT_IOOPTS
214 };
215
216 /*
217 * There should be a specific return value for this in scsi.h, but
218 * it seems that most drivers ignore it.
219 */
220 #define DID_UNDERFLOW DID_ERROR
221
222 void
223 ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
224 {
225 printk("(scsi%d:%c:%d:%d): ",
226 ahd->platform_data->host->host_no,
227 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
228 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
229 scb != NULL ? SCB_GET_LUN(scb) : -1);
230 }
231
232 /*
233 * XXX - these options apply unilaterally to _all_ adapters
234 * cards in the system. This should be fixed. Exceptions to this
235 * rule are noted in the comments.
236 */
237
238 /*
239 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
240 * has no effect on any later resets that might occur due to things like
241 * SCSI bus timeouts.
242 */
243 static uint32_t aic79xx_no_reset;
244
245 /*
246 * Certain PCI motherboards will scan PCI devices from highest to lowest,
247 * others scan from lowest to highest, and they tend to do all kinds of
248 * strange things when they come into contact with PCI bridge chips. The
249 * net result of all this is that the PCI card that is actually used to boot
250 * the machine is very hard to detect. Most motherboards go from lowest
251 * PCI slot number to highest, and the first SCSI controller found is the
252 * one you boot from. The only exceptions to this are when a controller
253 * has its BIOS disabled. So, we by default sort all of our SCSI controllers
254 * from lowest PCI slot number to highest PCI slot number. We also force
255 * all controllers with their BIOS disabled to the end of the list. This
256 * works on *almost* all computers. Where it doesn't work, we have this
257 * option. Setting this option to non-0 will reverse the order of the sort
258 * to highest first, then lowest, but will still leave cards with their BIOS
259 * disabled at the very end. That should fix everyone up unless there are
260 * really strange cirumstances.
261 */
262 static uint32_t aic79xx_reverse_scan;
263
264 /*
265 * Should we force EXTENDED translation on a controller.
266 * 0 == Use whatever is in the SEEPROM or default to off
267 * 1 == Use whatever is in the SEEPROM or default to on
268 */
269 static uint32_t aic79xx_extended;
270
271 /*
272 * PCI bus parity checking of the Adaptec controllers. This is somewhat
273 * dubious at best. To my knowledge, this option has never actually
274 * solved a PCI parity problem, but on certain machines with broken PCI
275 * chipset configurations, it can generate tons of false error messages.
276 * It's included in the driver for completeness.
277 * 0 = Shut off PCI parity check
278 * non-0 = Enable PCI parity check
279 *
280 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
281 * variable to -1 you would actually want to simply pass the variable
282 * name without a number. That will invert the 0 which will result in
283 * -1.
284 */
285 static uint32_t aic79xx_pci_parity = ~0;
286
287 /*
288 * There are lots of broken chipsets in the world. Some of them will
289 * violate the PCI spec when we issue byte sized memory writes to our
290 * controller. I/O mapped register access, if allowed by the given
291 * platform, will work in almost all cases.
292 */
293 uint32_t aic79xx_allow_memio = ~0;
294
295 /*
296 * So that we can set how long each device is given as a selection timeout.
297 * The table of values goes like this:
298 * 0 - 256ms
299 * 1 - 128ms
300 * 2 - 64ms
301 * 3 - 32ms
302 * We default to 256ms because some older devices need a longer time
303 * to respond to initial selection.
304 */
305 static uint32_t aic79xx_seltime;
306
307 /*
308 * Certain devices do not perform any aging on commands. Should the
309 * device be saturated by commands in one portion of the disk, it is
310 * possible for transactions on far away sectors to never be serviced.
311 * To handle these devices, we can periodically send an ordered tag to
312 * force all outstanding transactions to be serviced prior to a new
313 * transaction.
314 */
315 uint32_t aic79xx_periodic_otag;
316
317 /* Some storage boxes are using an LSI chip which has a bug making it
318 * impossible to use aic79xx Rev B chip in 320 speeds. The following
319 * storage boxes have been reported to be buggy:
320 * EonStor 3U 16-Bay: U16U-G3A3
321 * EonStor 2U 12-Bay: U12U-G3A3
322 * SentinelRAID: 2500F R5 / R6
323 * SentinelRAID: 2500F R1
324 * SentinelRAID: 2500F/1500F
325 * SentinelRAID: 150F
326 *
327 * To get around this LSI bug, you can set your board to 160 mode
328 * or you can enable the SLOWCRC bit.
329 */
330 uint32_t aic79xx_slowcrc;
331
332 /*
333 * Module information and settable options.
334 */
335 static char *aic79xx = NULL;
336
337 MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
338 MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver");
339 MODULE_LICENSE("Dual BSD/GPL");
340 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
341 module_param(aic79xx, charp, 0444);
342 MODULE_PARM_DESC(aic79xx,
343 "period delimited, options string.\n"
344 " verbose Enable verbose/diagnostic logging\n"
345 " allow_memio Allow device registers to be memory mapped\n"
346 " debug Bitmask of debug values to enable\n"
347 " no_reset Supress initial bus resets\n"
348 " extended Enable extended geometry on all controllers\n"
349 " periodic_otag Send an ordered tagged transaction\n"
350 " periodically to prevent tag starvation.\n"
351 " This may be required by some older disk\n"
352 " or drives/RAID arrays.\n"
353 " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
354 " tag_info:<tag_str> Set per-target tag depth\n"
355 " global_tag_depth:<int> Global tag depth for all targets on all buses\n"
356 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
357 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
358 " amplitude:<int> Set the signal amplitude (0-7).\n"
359 " seltime:<int> Selection Timeout:\n"
360 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
361 " slowcrc Turn on the SLOWCRC bit (Rev B only)\n"
362 "\n"
363 " Sample /etc/modprobe.conf line:\n"
364 " Enable verbose logging\n"
365 " Set tag depth on Controller 2/Target 2 to 10 tags\n"
366 " Shorten the selection timeout to 128ms\n"
367 "\n"
368 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
369 "\n");
370
371 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
372 struct scsi_device *,
373 struct scb *);
374 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
375 struct scsi_cmnd *cmd);
376 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
377 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
378 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
379 struct ahd_devinfo *devinfo);
380 static void ahd_linux_device_queue_depth(struct scsi_device *);
381 static int ahd_linux_run_command(struct ahd_softc*,
382 struct ahd_linux_device *,
383 struct scsi_cmnd *);
384 static void ahd_linux_setup_tag_info_global(char *p);
385 static int aic79xx_setup(char *c);
386
387 static int ahd_linux_unit;
388
389
390 /****************************** Inlines ***************************************/
391 static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
392
393 static __inline void
394 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
395 {
396 struct scsi_cmnd *cmd;
397 int direction;
398
399 cmd = scb->io_ctx;
400 direction = cmd->sc_data_direction;
401 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
402 if (cmd->use_sg != 0) {
403 struct scatterlist *sg;
404
405 sg = (struct scatterlist *)cmd->request_buffer;
406 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction);
407 } else if (cmd->request_bufflen != 0) {
408 pci_unmap_single(ahd->dev_softc,
409 scb->platform_data->buf_busaddr,
410 cmd->request_bufflen, direction);
411 }
412 }
413
414 /******************************** Macros **************************************/
415 #define BUILD_SCSIID(ahd, cmd) \
416 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
417
418 /*
419 * Return a string describing the driver.
420 */
421 static const char *
422 ahd_linux_info(struct Scsi_Host *host)
423 {
424 static char buffer[512];
425 char ahd_info[256];
426 char *bp;
427 struct ahd_softc *ahd;
428
429 bp = &buffer[0];
430 ahd = *(struct ahd_softc **)host->hostdata;
431 memset(bp, 0, sizeof(buffer));
432 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
433 strcat(bp, AIC79XX_DRIVER_VERSION);
434 strcat(bp, "\n");
435 strcat(bp, " <");
436 strcat(bp, ahd->description);
437 strcat(bp, ">\n");
438 strcat(bp, " ");
439 ahd_controller_info(ahd, ahd_info);
440 strcat(bp, ahd_info);
441 strcat(bp, "\n");
442
443 return (bp);
444 }
445
446 /*
447 * Queue an SCB to the controller.
448 */
449 static int
450 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
451 {
452 struct ahd_softc *ahd;
453 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
454 int rtn = SCSI_MLQUEUE_HOST_BUSY;
455
456 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
457
458 cmd->scsi_done = scsi_done;
459 cmd->result = CAM_REQ_INPROG << 16;
460 rtn = ahd_linux_run_command(ahd, dev, cmd);
461
462 return rtn;
463 }
464
465 static inline struct scsi_target **
466 ahd_linux_target_in_softc(struct scsi_target *starget)
467 {
468 struct ahd_softc *ahd =
469 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
470 unsigned int target_offset;
471
472 target_offset = starget->id;
473 if (starget->channel != 0)
474 target_offset += 8;
475
476 return &ahd->platform_data->starget[target_offset];
477 }
478
479 static int
480 ahd_linux_target_alloc(struct scsi_target *starget)
481 {
482 struct ahd_softc *ahd =
483 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
484 struct seeprom_config *sc = ahd->seep_config;
485 unsigned long flags;
486 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(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
498 if (sc) {
499 int flags = sc->device_flags[starget->id];
500
501 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
502 starget->id, &tstate);
503
504 if ((flags & CFPACKETIZED) == 0) {
505 /* Do not negotiate packetized transfers */
506 spi_rd_strm(starget) = 0;
507 spi_pcomp_en(starget) = 0;
508 spi_rti(starget) = 0;
509 spi_wr_flow(starget) = 0;
510 spi_hold_mcs(starget) = 0;
511 } else {
512 if ((ahd->features & AHD_RTI) == 0)
513 spi_rti(starget) = 0;
514 }
515
516 if ((flags & CFQAS) == 0)
517 spi_qas(starget) = 0;
518
519 /* Transinfo values have been set to BIOS settings */
520 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
521 spi_min_period(starget) = tinfo->user.period;
522 spi_max_offset(starget) = tinfo->user.offset;
523 }
524
525 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
526 starget->id, &tstate);
527 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
528 CAM_LUN_WILDCARD, channel,
529 ROLE_INITIATOR);
530 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
531 AHD_TRANS_GOAL, /*paused*/FALSE);
532 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
533 AHD_TRANS_GOAL, /*paused*/FALSE);
534 ahd_unlock(ahd, &flags);
535
536 return 0;
537 }
538
539 static void
540 ahd_linux_target_destroy(struct scsi_target *starget)
541 {
542 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
543
544 *ahd_targp = NULL;
545 }
546
547 static int
548 ahd_linux_slave_alloc(struct scsi_device *sdev)
549 {
550 struct ahd_softc *ahd =
551 *((struct ahd_softc **)sdev->host->hostdata);
552 struct ahd_linux_device *dev;
553
554 if (bootverbose)
555 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
556
557 dev = scsi_transport_device_data(sdev);
558 memset(dev, 0, sizeof(*dev));
559
560 /*
561 * We start out life using untagged
562 * transactions of which we allow one.
563 */
564 dev->openings = 1;
565
566 /*
567 * Set maxtags to 0. This will be changed if we
568 * later determine that we are dealing with
569 * a tagged queuing capable device.
570 */
571 dev->maxtags = 0;
572
573 return (0);
574 }
575
576 static int
577 ahd_linux_slave_configure(struct scsi_device *sdev)
578 {
579 struct ahd_softc *ahd;
580
581 ahd = *((struct ahd_softc **)sdev->host->hostdata);
582 if (bootverbose)
583 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
584
585 ahd_linux_device_queue_depth(sdev);
586
587 /* Initial Domain Validation */
588 if (!spi_initial_dv(sdev->sdev_target))
589 spi_dv_device(sdev);
590
591 return 0;
592 }
593
594 #if defined(__i386__)
595 /*
596 * Return the disk geometry for the given SCSI device.
597 */
598 static int
599 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
600 sector_t capacity, int geom[])
601 {
602 uint8_t *bh;
603 int heads;
604 int sectors;
605 int cylinders;
606 int ret;
607 int extended;
608 struct ahd_softc *ahd;
609
610 ahd = *((struct ahd_softc **)sdev->host->hostdata);
611
612 bh = scsi_bios_ptable(bdev);
613 if (bh) {
614 ret = scsi_partsize(bh, capacity,
615 &geom[2], &geom[0], &geom[1]);
616 kfree(bh);
617 if (ret != -1)
618 return (ret);
619 }
620 heads = 64;
621 sectors = 32;
622 cylinders = aic_sector_div(capacity, heads, sectors);
623
624 if (aic79xx_extended != 0)
625 extended = 1;
626 else
627 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
628 if (extended && cylinders >= 1024) {
629 heads = 255;
630 sectors = 63;
631 cylinders = aic_sector_div(capacity, heads, sectors);
632 }
633 geom[0] = heads;
634 geom[1] = sectors;
635 geom[2] = cylinders;
636 return (0);
637 }
638 #endif
639
640 /*
641 * Abort the current SCSI command(s).
642 */
643 static int
644 ahd_linux_abort(struct scsi_cmnd *cmd)
645 {
646 int error;
647
648 error = ahd_linux_queue_abort_cmd(cmd);
649
650 return error;
651 }
652
653 /*
654 * Attempt to send a target reset message to the device that timed out.
655 */
656 static int
657 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
658 {
659 struct ahd_softc *ahd;
660 struct ahd_linux_device *dev;
661 struct scb *reset_scb;
662 u_int cdb_byte;
663 int retval = SUCCESS;
664 int paused;
665 int wait;
666 struct ahd_initiator_tinfo *tinfo;
667 struct ahd_tmode_tstate *tstate;
668 unsigned long flags;
669 DECLARE_COMPLETION(done);
670
671 reset_scb = NULL;
672 paused = FALSE;
673 wait = FALSE;
674 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
675
676 scmd_printk(KERN_INFO, cmd,
677 "Attempting to queue a TARGET RESET message:");
678
679 printf("CDB:");
680 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
681 printf(" 0x%x", cmd->cmnd[cdb_byte]);
682 printf("\n");
683
684 /*
685 * Determine if we currently own this command.
686 */
687 dev = scsi_transport_device_data(cmd->device);
688
689 if (dev == NULL) {
690 /*
691 * No target device for this command exists,
692 * so we must not still own the command.
693 */
694 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
695 return SUCCESS;
696 }
697
698 /*
699 * Generate us a new SCB
700 */
701 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
702 if (!reset_scb) {
703 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
704 return FAILED;
705 }
706
707 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
708 cmd->device->id, &tstate);
709 reset_scb->io_ctx = cmd;
710 reset_scb->platform_data->dev = dev;
711 reset_scb->sg_count = 0;
712 ahd_set_residual(reset_scb, 0);
713 ahd_set_sense_residual(reset_scb, 0);
714 reset_scb->platform_data->xfer_len = 0;
715 reset_scb->hscb->control = 0;
716 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
717 reset_scb->hscb->lun = cmd->device->lun;
718 reset_scb->hscb->cdb_len = 0;
719 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
720 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
721 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
722 reset_scb->flags |= SCB_PACKETIZED;
723 } else {
724 reset_scb->hscb->control |= MK_MESSAGE;
725 }
726 dev->openings--;
727 dev->active++;
728 dev->commands_issued++;
729
730 ahd_lock(ahd, &flags);
731
732 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
733 ahd_queue_scb(ahd, reset_scb);
734
735 ahd->platform_data->eh_done = &done;
736 ahd_unlock(ahd, &flags);
737
738 printf("%s: Device reset code sleeping\n", ahd_name(ahd));
739 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
740 ahd_lock(ahd, &flags);
741 ahd->platform_data->eh_done = NULL;
742 ahd_unlock(ahd, &flags);
743 printf("%s: Device reset timer expired (active %d)\n",
744 ahd_name(ahd), dev->active);
745 retval = FAILED;
746 }
747 printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
748
749 return (retval);
750 }
751
752 /*
753 * Reset the SCSI bus.
754 */
755 static int
756 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
757 {
758 struct ahd_softc *ahd;
759 int found;
760 unsigned long flags;
761
762 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
763 #ifdef AHD_DEBUG
764 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
765 printf("%s: Bus reset called for cmd %p\n",
766 ahd_name(ahd), cmd);
767 #endif
768 ahd_lock(ahd, &flags);
769
770 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
771 /*initiate reset*/TRUE);
772 ahd_unlock(ahd, &flags);
773
774 if (bootverbose)
775 printf("%s: SCSI bus reset delivered. "
776 "%d SCBs aborted.\n", ahd_name(ahd), found);
777
778 return (SUCCESS);
779 }
780
781 struct scsi_host_template aic79xx_driver_template = {
782 .module = THIS_MODULE,
783 .name = "aic79xx",
784 .proc_name = "aic79xx",
785 .proc_info = ahd_linux_proc_info,
786 .info = ahd_linux_info,
787 .queuecommand = ahd_linux_queue,
788 .eh_abort_handler = ahd_linux_abort,
789 .eh_device_reset_handler = ahd_linux_dev_reset,
790 .eh_bus_reset_handler = ahd_linux_bus_reset,
791 #if defined(__i386__)
792 .bios_param = ahd_linux_biosparam,
793 #endif
794 .can_queue = AHD_MAX_QUEUE,
795 .this_id = -1,
796 .cmd_per_lun = 2,
797 .use_clustering = ENABLE_CLUSTERING,
798 .slave_alloc = ahd_linux_slave_alloc,
799 .slave_configure = ahd_linux_slave_configure,
800 .target_alloc = ahd_linux_target_alloc,
801 .target_destroy = ahd_linux_target_destroy,
802 };
803
804 /******************************** Bus DMA *************************************/
805 int
806 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
807 bus_size_t alignment, bus_size_t boundary,
808 dma_addr_t lowaddr, dma_addr_t highaddr,
809 bus_dma_filter_t *filter, void *filterarg,
810 bus_size_t maxsize, int nsegments,
811 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
812 {
813 bus_dma_tag_t dmat;
814
815 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
816 if (dmat == NULL)
817 return (ENOMEM);
818
819 /*
820 * Linux is very simplistic about DMA memory. For now don't
821 * maintain all specification information. Once Linux supplies
822 * better facilities for doing these operations, or the
823 * needs of this particular driver change, we might need to do
824 * more here.
825 */
826 dmat->alignment = alignment;
827 dmat->boundary = boundary;
828 dmat->maxsize = maxsize;
829 *ret_tag = dmat;
830 return (0);
831 }
832
833 void
834 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
835 {
836 free(dmat, M_DEVBUF);
837 }
838
839 int
840 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
841 int flags, bus_dmamap_t *mapp)
842 {
843 *vaddr = pci_alloc_consistent(ahd->dev_softc,
844 dmat->maxsize, mapp);
845 if (*vaddr == NULL)
846 return (ENOMEM);
847 return(0);
848 }
849
850 void
851 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
852 void* vaddr, bus_dmamap_t map)
853 {
854 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
855 vaddr, map);
856 }
857
858 int
859 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
860 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
861 void *cb_arg, int flags)
862 {
863 /*
864 * Assume for now that this will only be used during
865 * initialization and not for per-transaction buffer mapping.
866 */
867 bus_dma_segment_t stack_sg;
868
869 stack_sg.ds_addr = map;
870 stack_sg.ds_len = dmat->maxsize;
871 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
872 return (0);
873 }
874
875 void
876 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
877 {
878 }
879
880 int
881 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
882 {
883 /* Nothing to do */
884 return (0);
885 }
886
887 /********************* Platform Dependent Functions ***************************/
888 static void
889 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
890 {
891
892 if ((instance >= 0)
893 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
894 uint8_t *iocell_info;
895
896 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
897 iocell_info[index] = value & 0xFFFF;
898 if (bootverbose)
899 printf("iocell[%d:%ld] = %d\n", instance, index, value);
900 }
901 }
902
903 static void
904 ahd_linux_setup_tag_info_global(char *p)
905 {
906 int tags, i, j;
907
908 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
909 printf("Setting Global Tags= %d\n", tags);
910
911 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
912 for (j = 0; j < AHD_NUM_TARGETS; j++) {
913 aic79xx_tag_info[i].tag_commands[j] = tags;
914 }
915 }
916 }
917
918 static void
919 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
920 {
921
922 if ((instance >= 0) && (targ >= 0)
923 && (instance < ARRAY_SIZE(aic79xx_tag_info))
924 && (targ < AHD_NUM_TARGETS)) {
925 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
926 if (bootverbose)
927 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
928 }
929 }
930
931 static char *
932 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
933 void (*callback)(u_long, int, int, int32_t),
934 u_long callback_arg)
935 {
936 char *tok_end;
937 char *tok_end2;
938 int i;
939 int instance;
940 int targ;
941 int done;
942 char tok_list[] = {'.', ',', '{', '}', '\0'};
943
944 /* All options use a ':' name/arg separator */
945 if (*opt_arg != ':')
946 return (opt_arg);
947 opt_arg++;
948 instance = -1;
949 targ = -1;
950 done = FALSE;
951 /*
952 * Restore separator that may be in
953 * the middle of our option argument.
954 */
955 tok_end = strchr(opt_arg, '\0');
956 if (tok_end < end)
957 *tok_end = ',';
958 while (!done) {
959 switch (*opt_arg) {
960 case '{':
961 if (instance == -1) {
962 instance = 0;
963 } else {
964 if (depth > 1) {
965 if (targ == -1)
966 targ = 0;
967 } else {
968 printf("Malformed Option %s\n",
969 opt_name);
970 done = TRUE;
971 }
972 }
973 opt_arg++;
974 break;
975 case '}':
976 if (targ != -1)
977 targ = -1;
978 else if (instance != -1)
979 instance = -1;
980 opt_arg++;
981 break;
982 case ',':
983 case '.':
984 if (instance == -1)
985 done = TRUE;
986 else if (targ >= 0)
987 targ++;
988 else if (instance >= 0)
989 instance++;
990 opt_arg++;
991 break;
992 case '\0':
993 done = TRUE;
994 break;
995 default:
996 tok_end = end;
997 for (i = 0; tok_list[i]; i++) {
998 tok_end2 = strchr(opt_arg, tok_list[i]);
999 if ((tok_end2) && (tok_end2 < tok_end))
1000 tok_end = tok_end2;
1001 }
1002 callback(callback_arg, instance, targ,
1003 simple_strtol(opt_arg, NULL, 0));
1004 opt_arg = tok_end;
1005 break;
1006 }
1007 }
1008 return (opt_arg);
1009 }
1010
1011 /*
1012 * Handle Linux boot parameters. This routine allows for assigning a value
1013 * to a parameter with a ':' between the parameter and the value.
1014 * ie. aic79xx=stpwlev:1,extended
1015 */
1016 static int
1017 aic79xx_setup(char *s)
1018 {
1019 int i, n;
1020 char *p;
1021 char *end;
1022
1023 static struct {
1024 const char *name;
1025 uint32_t *flag;
1026 } options[] = {
1027 { "extended", &aic79xx_extended },
1028 { "no_reset", &aic79xx_no_reset },
1029 { "verbose", &aic79xx_verbose },
1030 { "allow_memio", &aic79xx_allow_memio},
1031 #ifdef AHD_DEBUG
1032 { "debug", &ahd_debug },
1033 #endif
1034 { "reverse_scan", &aic79xx_reverse_scan },
1035 { "periodic_otag", &aic79xx_periodic_otag },
1036 { "pci_parity", &aic79xx_pci_parity },
1037 { "seltime", &aic79xx_seltime },
1038 { "tag_info", NULL },
1039 { "global_tag_depth", NULL},
1040 { "slewrate", NULL },
1041 { "precomp", NULL },
1042 { "amplitude", NULL },
1043 { "slowcrc", &aic79xx_slowcrc },
1044 };
1045
1046 end = strchr(s, '\0');
1047
1048 /*
1049 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1050 * will never be 0 in this case.
1051 */
1052 n = 0;
1053
1054 while ((p = strsep(&s, ",.")) != NULL) {
1055 if (*p == '\0')
1056 continue;
1057 for (i = 0; i < ARRAY_SIZE(options); i++) {
1058
1059 n = strlen(options[i].name);
1060 if (strncmp(options[i].name, p, n) == 0)
1061 break;
1062 }
1063 if (i == ARRAY_SIZE(options))
1064 continue;
1065
1066 if (strncmp(p, "global_tag_depth", n) == 0) {
1067 ahd_linux_setup_tag_info_global(p + n);
1068 } else if (strncmp(p, "tag_info", n) == 0) {
1069 s = ahd_parse_brace_option("tag_info", p + n, end,
1070 2, ahd_linux_setup_tag_info, 0);
1071 } else if (strncmp(p, "slewrate", n) == 0) {
1072 s = ahd_parse_brace_option("slewrate",
1073 p + n, end, 1, ahd_linux_setup_iocell_info,
1074 AIC79XX_SLEWRATE_INDEX);
1075 } else if (strncmp(p, "precomp", n) == 0) {
1076 s = ahd_parse_brace_option("precomp",
1077 p + n, end, 1, ahd_linux_setup_iocell_info,
1078 AIC79XX_PRECOMP_INDEX);
1079 } else if (strncmp(p, "amplitude", n) == 0) {
1080 s = ahd_parse_brace_option("amplitude",
1081 p + n, end, 1, ahd_linux_setup_iocell_info,
1082 AIC79XX_AMPLITUDE_INDEX);
1083 } else if (p[n] == ':') {
1084 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1085 } else if (!strncmp(p, "verbose", n)) {
1086 *(options[i].flag) = 1;
1087 } else {
1088 *(options[i].flag) ^= 0xFFFFFFFF;
1089 }
1090 }
1091 return 1;
1092 }
1093
1094 __setup("aic79xx=", aic79xx_setup);
1095
1096 uint32_t aic79xx_verbose;
1097
1098 int
1099 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1100 {
1101 char buf[80];
1102 struct Scsi_Host *host;
1103 char *new_name;
1104 u_long s;
1105 int retval;
1106
1107 template->name = ahd->description;
1108 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1109 if (host == NULL)
1110 return (ENOMEM);
1111
1112 *((struct ahd_softc **)host->hostdata) = ahd;
1113 ahd->platform_data->host = host;
1114 host->can_queue = AHD_MAX_QUEUE;
1115 host->cmd_per_lun = 2;
1116 host->sg_tablesize = AHD_NSEG;
1117 host->this_id = ahd->our_id;
1118 host->irq = ahd->platform_data->irq;
1119 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1120 host->max_lun = AHD_NUM_LUNS;
1121 host->max_channel = 0;
1122 host->sg_tablesize = AHD_NSEG;
1123 ahd_lock(ahd, &s);
1124 ahd_set_unit(ahd, ahd_linux_unit++);
1125 ahd_unlock(ahd, &s);
1126 sprintf(buf, "scsi%d", host->host_no);
1127 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1128 if (new_name != NULL) {
1129 strcpy(new_name, buf);
1130 ahd_set_name(ahd, new_name);
1131 }
1132 host->unique_id = ahd->unit;
1133 ahd_linux_initialize_scsi_bus(ahd);
1134 ahd_intr_enable(ahd, TRUE);
1135
1136 host->transportt = ahd_linux_transport_template;
1137
1138 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1139 if (retval) {
1140 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1141 scsi_host_put(host);
1142 return retval;
1143 }
1144
1145 scsi_scan_host(host);
1146 return 0;
1147 }
1148
1149 uint64_t
1150 ahd_linux_get_memsize(void)
1151 {
1152 struct sysinfo si;
1153
1154 si_meminfo(&si);
1155 return ((uint64_t)si.totalram << PAGE_SHIFT);
1156 }
1157
1158 /*
1159 * Place the SCSI bus into a known state by either resetting it,
1160 * or forcing transfer negotiations on the next command to any
1161 * target.
1162 */
1163 static void
1164 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1165 {
1166 u_int target_id;
1167 u_int numtarg;
1168 unsigned long s;
1169
1170 target_id = 0;
1171 numtarg = 0;
1172
1173 if (aic79xx_no_reset != 0)
1174 ahd->flags &= ~AHD_RESET_BUS_A;
1175
1176 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1177 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1178 else
1179 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1180
1181 ahd_lock(ahd, &s);
1182
1183 /*
1184 * Force negotiation to async for all targets that
1185 * will not see an initial bus reset.
1186 */
1187 for (; target_id < numtarg; target_id++) {
1188 struct ahd_devinfo devinfo;
1189 struct ahd_initiator_tinfo *tinfo;
1190 struct ahd_tmode_tstate *tstate;
1191
1192 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1193 target_id, &tstate);
1194 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1195 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1196 ahd_update_neg_request(ahd, &devinfo, tstate,
1197 tinfo, AHD_NEG_ALWAYS);
1198 }
1199 ahd_unlock(ahd, &s);
1200 /* Give the bus some time to recover */
1201 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1202 ahd_freeze_simq(ahd);
1203 msleep(AIC79XX_RESET_DELAY);
1204 ahd_release_simq(ahd);
1205 }
1206 }
1207
1208 int
1209 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1210 {
1211 ahd->platform_data =
1212 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1213 if (ahd->platform_data == NULL)
1214 return (ENOMEM);
1215 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1216 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1217 ahd_lockinit(ahd);
1218 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1219 return (0);
1220 }
1221
1222 void
1223 ahd_platform_free(struct ahd_softc *ahd)
1224 {
1225 struct scsi_target *starget;
1226 int i;
1227
1228 if (ahd->platform_data != NULL) {
1229 /* destroy all of the device and target objects */
1230 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1231 starget = ahd->platform_data->starget[i];
1232 if (starget != NULL) {
1233 ahd->platform_data->starget[i] = NULL;
1234 }
1235 }
1236
1237 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1238 free_irq(ahd->platform_data->irq, ahd);
1239 if (ahd->tags[0] == BUS_SPACE_PIO
1240 && ahd->bshs[0].ioport != 0)
1241 release_region(ahd->bshs[0].ioport, 256);
1242 if (ahd->tags[1] == BUS_SPACE_PIO
1243 && ahd->bshs[1].ioport != 0)
1244 release_region(ahd->bshs[1].ioport, 256);
1245 if (ahd->tags[0] == BUS_SPACE_MEMIO
1246 && ahd->bshs[0].maddr != NULL) {
1247 iounmap(ahd->bshs[0].maddr);
1248 release_mem_region(ahd->platform_data->mem_busaddr,
1249 0x1000);
1250 }
1251 if (ahd->platform_data->host)
1252 scsi_host_put(ahd->platform_data->host);
1253
1254 free(ahd->platform_data, M_DEVBUF);
1255 }
1256 }
1257
1258 void
1259 ahd_platform_init(struct ahd_softc *ahd)
1260 {
1261 /*
1262 * Lookup and commit any modified IO Cell options.
1263 */
1264 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1265 struct ahd_linux_iocell_opts *iocell_opts;
1266
1267 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1268 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1269 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1270 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1271 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1272 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1273 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1274 }
1275
1276 }
1277
1278 void
1279 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1280 {
1281 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1282 SCB_GET_CHANNEL(ahd, scb),
1283 SCB_GET_LUN(scb), SCB_LIST_NULL,
1284 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1285 }
1286
1287 void
1288 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1289 struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1290 {
1291 struct ahd_linux_device *dev;
1292 int was_queuing;
1293 int now_queuing;
1294
1295 if (sdev == NULL)
1296 return;
1297
1298 dev = scsi_transport_device_data(sdev);
1299
1300 if (dev == NULL)
1301 return;
1302 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1303 switch (alg) {
1304 default:
1305 case AHD_QUEUE_NONE:
1306 now_queuing = 0;
1307 break;
1308 case AHD_QUEUE_BASIC:
1309 now_queuing = AHD_DEV_Q_BASIC;
1310 break;
1311 case AHD_QUEUE_TAGGED:
1312 now_queuing = AHD_DEV_Q_TAGGED;
1313 break;
1314 }
1315 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1316 && (was_queuing != now_queuing)
1317 && (dev->active != 0)) {
1318 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1319 dev->qfrozen++;
1320 }
1321
1322 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1323 if (now_queuing) {
1324 u_int usertags;
1325
1326 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1327 if (!was_queuing) {
1328 /*
1329 * Start out agressively and allow our
1330 * dynamic queue depth algorithm to take
1331 * care of the rest.
1332 */
1333 dev->maxtags = usertags;
1334 dev->openings = dev->maxtags - dev->active;
1335 }
1336 if (dev->maxtags == 0) {
1337 /*
1338 * Queueing is disabled by the user.
1339 */
1340 dev->openings = 1;
1341 } else if (alg == AHD_QUEUE_TAGGED) {
1342 dev->flags |= AHD_DEV_Q_TAGGED;
1343 if (aic79xx_periodic_otag != 0)
1344 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1345 } else
1346 dev->flags |= AHD_DEV_Q_BASIC;
1347 } else {
1348 /* We can only have one opening. */
1349 dev->maxtags = 0;
1350 dev->openings = 1 - dev->active;
1351 }
1352
1353 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1354 case AHD_DEV_Q_BASIC:
1355 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1356 scsi_activate_tcq(sdev, dev->openings + dev->active);
1357 break;
1358 case AHD_DEV_Q_TAGGED:
1359 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1360 scsi_activate_tcq(sdev, dev->openings + dev->active);
1361 break;
1362 default:
1363 /*
1364 * We allow the OS to queue 2 untagged transactions to
1365 * us at any time even though we can only execute them
1366 * serially on the controller/device. This should
1367 * remove some latency.
1368 */
1369 scsi_deactivate_tcq(sdev, 1);
1370 break;
1371 }
1372 }
1373
1374 int
1375 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1376 int lun, u_int tag, role_t role, uint32_t status)
1377 {
1378 return 0;
1379 }
1380
1381 static u_int
1382 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1383 {
1384 static int warned_user;
1385 u_int tags;
1386
1387 tags = 0;
1388 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1389 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1390
1391 if (warned_user == 0) {
1392 printf(KERN_WARNING
1393 "aic79xx: WARNING: Insufficient tag_info instances\n"
1394 "aic79xx: for installed controllers. Using defaults\n"
1395 "aic79xx: Please update the aic79xx_tag_info array in\n"
1396 "aic79xx: the aic79xx_osm.c source file.\n");
1397 warned_user++;
1398 }
1399 tags = AHD_MAX_QUEUE;
1400 } else {
1401 adapter_tag_info_t *tag_info;
1402
1403 tag_info = &aic79xx_tag_info[ahd->unit];
1404 tags = tag_info->tag_commands[devinfo->target_offset];
1405 if (tags > AHD_MAX_QUEUE)
1406 tags = AHD_MAX_QUEUE;
1407 }
1408 }
1409 return (tags);
1410 }
1411
1412 /*
1413 * Determines the queue depth for a given device.
1414 */
1415 static void
1416 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1417 {
1418 struct ahd_devinfo devinfo;
1419 u_int tags;
1420 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1421
1422 ahd_compile_devinfo(&devinfo,
1423 ahd->our_id,
1424 sdev->sdev_target->id, sdev->lun,
1425 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1426 ROLE_INITIATOR);
1427 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1428 if (tags != 0 && sdev->tagged_supported != 0) {
1429
1430 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1431 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1432 devinfo.lun, AC_TRANSFER_NEG);
1433 ahd_print_devinfo(ahd, &devinfo);
1434 printf("Tagged Queuing enabled. Depth %d\n", tags);
1435 } else {
1436 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1437 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1438 devinfo.lun, AC_TRANSFER_NEG);
1439 }
1440 }
1441
1442 static int
1443 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1444 struct scsi_cmnd *cmd)
1445 {
1446 struct scb *scb;
1447 struct hardware_scb *hscb;
1448 struct ahd_initiator_tinfo *tinfo;
1449 struct ahd_tmode_tstate *tstate;
1450 u_int col_idx;
1451 uint16_t mask;
1452 unsigned long flags;
1453
1454 ahd_lock(ahd, &flags);
1455
1456 /*
1457 * Get an scb to use.
1458 */
1459 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1460 cmd->device->id, &tstate);
1461 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1462 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1463 col_idx = AHD_NEVER_COL_IDX;
1464 } else {
1465 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1466 cmd->device->lun);
1467 }
1468 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1469 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1470 ahd_unlock(ahd, &flags);
1471 return SCSI_MLQUEUE_HOST_BUSY;
1472 }
1473
1474 scb->io_ctx = cmd;
1475 scb->platform_data->dev = dev;
1476 hscb = scb->hscb;
1477 cmd->host_scribble = (char *)scb;
1478
1479 /*
1480 * Fill out basics of the HSCB.
1481 */
1482 hscb->control = 0;
1483 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1484 hscb->lun = cmd->device->lun;
1485 scb->hscb->task_management = 0;
1486 mask = SCB_GET_TARGET_MASK(ahd, scb);
1487
1488 if ((ahd->user_discenable & mask) != 0)
1489 hscb->control |= DISCENB;
1490
1491 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1492 scb->flags |= SCB_PACKETIZED;
1493
1494 if ((tstate->auto_negotiate & mask) != 0) {
1495 scb->flags |= SCB_AUTO_NEGOTIATE;
1496 scb->hscb->control |= MK_MESSAGE;
1497 }
1498
1499 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1500 int msg_bytes;
1501 uint8_t tag_msgs[2];
1502
1503 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1504 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1505 hscb->control |= tag_msgs[0];
1506 if (tag_msgs[0] == MSG_ORDERED_TASK)
1507 dev->commands_since_idle_or_otag = 0;
1508 } else
1509 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1510 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1511 hscb->control |= MSG_ORDERED_TASK;
1512 dev->commands_since_idle_or_otag = 0;
1513 } else {
1514 hscb->control |= MSG_SIMPLE_TASK;
1515 }
1516 }
1517
1518 hscb->cdb_len = cmd->cmd_len;
1519 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1520
1521 scb->platform_data->xfer_len = 0;
1522 ahd_set_residual(scb, 0);
1523 ahd_set_sense_residual(scb, 0);
1524 scb->sg_count = 0;
1525 if (cmd->use_sg != 0) {
1526 void *sg;
1527 struct scatterlist *cur_seg;
1528 u_int nseg;
1529 int dir;
1530
1531 cur_seg = (struct scatterlist *)cmd->request_buffer;
1532 dir = cmd->sc_data_direction;
1533 nseg = pci_map_sg(ahd->dev_softc, cur_seg,
1534 cmd->use_sg, dir);
1535 scb->platform_data->xfer_len = 0;
1536 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
1537 dma_addr_t addr;
1538 bus_size_t len;
1539
1540 addr = sg_dma_address(cur_seg);
1541 len = sg_dma_len(cur_seg);
1542 scb->platform_data->xfer_len += len;
1543 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1544 /*last*/nseg == 1);
1545 }
1546 } else if (cmd->request_bufflen != 0) {
1547 void *sg;
1548 dma_addr_t addr;
1549 int dir;
1550
1551 sg = scb->sg_list;
1552 dir = cmd->sc_data_direction;
1553 addr = pci_map_single(ahd->dev_softc,
1554 cmd->request_buffer,
1555 cmd->request_bufflen, dir);
1556 scb->platform_data->xfer_len = cmd->request_bufflen;
1557 scb->platform_data->buf_busaddr = addr;
1558 sg = ahd_sg_setup(ahd, scb, sg, addr,
1559 cmd->request_bufflen, /*last*/TRUE);
1560 }
1561
1562 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1563 dev->openings--;
1564 dev->active++;
1565 dev->commands_issued++;
1566
1567 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1568 dev->commands_since_idle_or_otag++;
1569 scb->flags |= SCB_ACTIVE;
1570 ahd_queue_scb(ahd, scb);
1571
1572 ahd_unlock(ahd, &flags);
1573
1574 return 0;
1575 }
1576
1577 /*
1578 * SCSI controller interrupt handler.
1579 */
1580 irqreturn_t
1581 ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1582 {
1583 struct ahd_softc *ahd;
1584 u_long flags;
1585 int ours;
1586
1587 ahd = (struct ahd_softc *) dev_id;
1588 ahd_lock(ahd, &flags);
1589 ours = ahd_intr(ahd);
1590 ahd_unlock(ahd, &flags);
1591 return IRQ_RETVAL(ours);
1592 }
1593
1594 void
1595 ahd_send_async(struct ahd_softc *ahd, char channel,
1596 u_int target, u_int lun, ac_code code)
1597 {
1598 switch (code) {
1599 case AC_TRANSFER_NEG:
1600 {
1601 char buf[80];
1602 struct scsi_target *starget;
1603 struct info_str info;
1604 struct ahd_initiator_tinfo *tinfo;
1605 struct ahd_tmode_tstate *tstate;
1606 unsigned int target_ppr_options;
1607
1608 BUG_ON(target == CAM_TARGET_WILDCARD);
1609
1610 info.buffer = buf;
1611 info.length = sizeof(buf);
1612 info.offset = 0;
1613 info.pos = 0;
1614 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1615 target, &tstate);
1616
1617 /*
1618 * Don't bother reporting results while
1619 * negotiations are still pending.
1620 */
1621 if (tinfo->curr.period != tinfo->goal.period
1622 || tinfo->curr.width != tinfo->goal.width
1623 || tinfo->curr.offset != tinfo->goal.offset
1624 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1625 if (bootverbose == 0)
1626 break;
1627
1628 /*
1629 * Don't bother reporting results that
1630 * are identical to those last reported.
1631 */
1632 starget = ahd->platform_data->starget[target];
1633 if (starget == NULL)
1634 break;
1635
1636 target_ppr_options =
1637 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1638 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1639 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1640 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1641 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1642 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1643 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1644 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1645
1646 if (tinfo->curr.period == spi_period(starget)
1647 && tinfo->curr.width == spi_width(starget)
1648 && tinfo->curr.offset == spi_offset(starget)
1649 && tinfo->curr.ppr_options == target_ppr_options)
1650 if (bootverbose == 0)
1651 break;
1652
1653 spi_period(starget) = tinfo->curr.period;
1654 spi_width(starget) = tinfo->curr.width;
1655 spi_offset(starget) = tinfo->curr.offset;
1656 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1657 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1658 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1659 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1660 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1661 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1662 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1663 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1664 spi_display_xfer_agreement(starget);
1665 break;
1666 }
1667 case AC_SENT_BDR:
1668 {
1669 WARN_ON(lun != CAM_LUN_WILDCARD);
1670 scsi_report_device_reset(ahd->platform_data->host,
1671 channel - 'A', target);
1672 break;
1673 }
1674 case AC_BUS_RESET:
1675 if (ahd->platform_data->host != NULL) {
1676 scsi_report_bus_reset(ahd->platform_data->host,
1677 channel - 'A');
1678 }
1679 break;
1680 default:
1681 panic("ahd_send_async: Unexpected async event");
1682 }
1683 }
1684
1685 /*
1686 * Calls the higher level scsi done function and frees the scb.
1687 */
1688 void
1689 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1690 {
1691 struct scsi_cmnd *cmd;
1692 struct ahd_linux_device *dev;
1693
1694 if ((scb->flags & SCB_ACTIVE) == 0) {
1695 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1696 ahd_dump_card_state(ahd);
1697 panic("Stopping for safety");
1698 }
1699 LIST_REMOVE(scb, pending_links);
1700 cmd = scb->io_ctx;
1701 dev = scb->platform_data->dev;
1702 dev->active--;
1703 dev->openings++;
1704 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1705 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1706 dev->qfrozen--;
1707 }
1708 ahd_linux_unmap_scb(ahd, scb);
1709
1710 /*
1711 * Guard against stale sense data.
1712 * The Linux mid-layer assumes that sense
1713 * was retrieved anytime the first byte of
1714 * the sense buffer looks "sane".
1715 */
1716 cmd->sense_buffer[0] = 0;
1717 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1718 uint32_t amount_xferred;
1719
1720 amount_xferred =
1721 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1722 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1723 #ifdef AHD_DEBUG
1724 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1725 ahd_print_path(ahd, scb);
1726 printf("Set CAM_UNCOR_PARITY\n");
1727 }
1728 #endif
1729 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1730 #ifdef AHD_REPORT_UNDERFLOWS
1731 /*
1732 * This code is disabled by default as some
1733 * clients of the SCSI system do not properly
1734 * initialize the underflow parameter. This
1735 * results in spurious termination of commands
1736 * that complete as expected (e.g. underflow is
1737 * allowed as command can return variable amounts
1738 * of data.
1739 */
1740 } else if (amount_xferred < scb->io_ctx->underflow) {
1741 u_int i;
1742
1743 ahd_print_path(ahd, scb);
1744 printf("CDB:");
1745 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1746 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1747 printf("\n");
1748 ahd_print_path(ahd, scb);
1749 printf("Saw underflow (%ld of %ld bytes). "
1750 "Treated as error\n",
1751 ahd_get_residual(scb),
1752 ahd_get_transfer_length(scb));
1753 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1754 #endif
1755 } else {
1756 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1757 }
1758 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1759 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1760 }
1761
1762 if (dev->openings == 1
1763 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1764 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1765 dev->tag_success_count++;
1766 /*
1767 * Some devices deal with temporary internal resource
1768 * shortages by returning queue full. When the queue
1769 * full occurrs, we throttle back. Slowly try to get
1770 * back to our previous queue depth.
1771 */
1772 if ((dev->openings + dev->active) < dev->maxtags
1773 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1774 dev->tag_success_count = 0;
1775 dev->openings++;
1776 }
1777
1778 if (dev->active == 0)
1779 dev->commands_since_idle_or_otag = 0;
1780
1781 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1782 printf("Recovery SCB completes\n");
1783 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1784 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1785 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1786
1787 if (ahd->platform_data->eh_done)
1788 complete(ahd->platform_data->eh_done);
1789 }
1790
1791 ahd_free_scb(ahd, scb);
1792 ahd_linux_queue_cmd_complete(ahd, cmd);
1793 }
1794
1795 static void
1796 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1797 struct scsi_device *sdev, struct scb *scb)
1798 {
1799 struct ahd_devinfo devinfo;
1800 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1801
1802 ahd_compile_devinfo(&devinfo,
1803 ahd->our_id,
1804 sdev->sdev_target->id, sdev->lun,
1805 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1806 ROLE_INITIATOR);
1807
1808 /*
1809 * We don't currently trust the mid-layer to
1810 * properly deal with queue full or busy. So,
1811 * when one occurs, we tell the mid-layer to
1812 * unconditionally requeue the command to us
1813 * so that we can retry it ourselves. We also
1814 * implement our own throttling mechanism so
1815 * we don't clobber the device with too many
1816 * commands.
1817 */
1818 switch (ahd_get_scsi_status(scb)) {
1819 default:
1820 break;
1821 case SCSI_STATUS_CHECK_COND:
1822 case SCSI_STATUS_CMD_TERMINATED:
1823 {
1824 struct scsi_cmnd *cmd;
1825
1826 /*
1827 * Copy sense information to the OS's cmd
1828 * structure if it is available.
1829 */
1830 cmd = scb->io_ctx;
1831 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1832 struct scsi_status_iu_header *siu;
1833 u_int sense_size;
1834 u_int sense_offset;
1835
1836 if (scb->flags & SCB_SENSE) {
1837 sense_size = MIN(sizeof(struct scsi_sense_data)
1838 - ahd_get_sense_residual(scb),
1839 sizeof(cmd->sense_buffer));
1840 sense_offset = 0;
1841 } else {
1842 /*
1843 * Copy only the sense data into the provided
1844 * buffer.
1845 */
1846 siu = (struct scsi_status_iu_header *)
1847 scb->sense_data;
1848 sense_size = MIN(scsi_4btoul(siu->sense_length),
1849 sizeof(cmd->sense_buffer));
1850 sense_offset = SIU_SENSE_OFFSET(siu);
1851 }
1852
1853 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
1854 memcpy(cmd->sense_buffer,
1855 ahd_get_sense_buf(ahd, scb)
1856 + sense_offset, sense_size);
1857 cmd->result |= (DRIVER_SENSE << 24);
1858
1859 #ifdef AHD_DEBUG
1860 if (ahd_debug & AHD_SHOW_SENSE) {
1861 int i;
1862
1863 printf("Copied %d bytes of sense data at %d:",
1864 sense_size, sense_offset);
1865 for (i = 0; i < sense_size; i++) {
1866 if ((i & 0xF) == 0)
1867 printf("\n");
1868 printf("0x%x ", cmd->sense_buffer[i]);
1869 }
1870 printf("\n");
1871 }
1872 #endif
1873 }
1874 break;
1875 }
1876 case SCSI_STATUS_QUEUE_FULL:
1877 /*
1878 * By the time the core driver has returned this
1879 * command, all other commands that were queued
1880 * to us but not the device have been returned.
1881 * This ensures that dev->active is equal to
1882 * the number of commands actually queued to
1883 * the device.
1884 */
1885 dev->tag_success_count = 0;
1886 if (dev->active != 0) {
1887 /*
1888 * Drop our opening count to the number
1889 * of commands currently outstanding.
1890 */
1891 dev->openings = 0;
1892 #ifdef AHD_DEBUG
1893 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1894 ahd_print_path(ahd, scb);
1895 printf("Dropping tag count to %d\n",
1896 dev->active);
1897 }
1898 #endif
1899 if (dev->active == dev->tags_on_last_queuefull) {
1900
1901 dev->last_queuefull_same_count++;
1902 /*
1903 * If we repeatedly see a queue full
1904 * at the same queue depth, this
1905 * device has a fixed number of tag
1906 * slots. Lock in this tag depth
1907 * so we stop seeing queue fulls from
1908 * this device.
1909 */
1910 if (dev->last_queuefull_same_count
1911 == AHD_LOCK_TAGS_COUNT) {
1912 dev->maxtags = dev->active;
1913 ahd_print_path(ahd, scb);
1914 printf("Locking max tag count at %d\n",
1915 dev->active);
1916 }
1917 } else {
1918 dev->tags_on_last_queuefull = dev->active;
1919 dev->last_queuefull_same_count = 0;
1920 }
1921 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1922 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1923 ahd_platform_set_tags(ahd, sdev, &devinfo,
1924 (dev->flags & AHD_DEV_Q_BASIC)
1925 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1926 break;
1927 }
1928 /*
1929 * Drop down to a single opening, and treat this
1930 * as if the target returned BUSY SCSI status.
1931 */
1932 dev->openings = 1;
1933 ahd_platform_set_tags(ahd, sdev, &devinfo,
1934 (dev->flags & AHD_DEV_Q_BASIC)
1935 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1936 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
1937 }
1938 }
1939
1940 static void
1941 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
1942 {
1943 int status;
1944 int new_status = DID_OK;
1945 int do_fallback = 0;
1946 int scsi_status;
1947
1948 /*
1949 * Map CAM error codes into Linux Error codes. We
1950 * avoid the conversion so that the DV code has the
1951 * full error information available when making
1952 * state change decisions.
1953 */
1954
1955 status = ahd_cmd_get_transaction_status(cmd);
1956 switch (status) {
1957 case CAM_REQ_INPROG:
1958 case CAM_REQ_CMP:
1959 new_status = DID_OK;
1960 break;
1961 case CAM_AUTOSENSE_FAIL:
1962 new_status = DID_ERROR;
1963 /* Fallthrough */
1964 case CAM_SCSI_STATUS_ERROR:
1965 scsi_status = ahd_cmd_get_scsi_status(cmd);
1966
1967 switch(scsi_status) {
1968 case SCSI_STATUS_CMD_TERMINATED:
1969 case SCSI_STATUS_CHECK_COND:
1970 if ((cmd->result >> 24) != DRIVER_SENSE) {
1971 do_fallback = 1;
1972 } else {
1973 struct scsi_sense_data *sense;
1974
1975 sense = (struct scsi_sense_data *)
1976 &cmd->sense_buffer;
1977 if (sense->extra_len >= 5 &&
1978 (sense->add_sense_code == 0x47
1979 || sense->add_sense_code == 0x48))
1980 do_fallback = 1;
1981 }
1982 break;
1983 default:
1984 break;
1985 }
1986 break;
1987 case CAM_REQ_ABORTED:
1988 new_status = DID_ABORT;
1989 break;
1990 case CAM_BUSY:
1991 new_status = DID_BUS_BUSY;
1992 break;
1993 case CAM_REQ_INVALID:
1994 case CAM_PATH_INVALID:
1995 new_status = DID_BAD_TARGET;
1996 break;
1997 case CAM_SEL_TIMEOUT:
1998 new_status = DID_NO_CONNECT;
1999 break;
2000 case CAM_SCSI_BUS_RESET:
2001 case CAM_BDR_SENT:
2002 new_status = DID_RESET;
2003 break;
2004 case CAM_UNCOR_PARITY:
2005 new_status = DID_PARITY;
2006 do_fallback = 1;
2007 break;
2008 case CAM_CMD_TIMEOUT:
2009 new_status = DID_TIME_OUT;
2010 do_fallback = 1;
2011 break;
2012 case CAM_REQ_CMP_ERR:
2013 case CAM_UNEXP_BUSFREE:
2014 case CAM_DATA_RUN_ERR:
2015 new_status = DID_ERROR;
2016 do_fallback = 1;
2017 break;
2018 case CAM_UA_ABORT:
2019 case CAM_NO_HBA:
2020 case CAM_SEQUENCE_FAIL:
2021 case CAM_CCB_LEN_ERR:
2022 case CAM_PROVIDE_FAIL:
2023 case CAM_REQ_TERMIO:
2024 case CAM_UNREC_HBA_ERROR:
2025 case CAM_REQ_TOO_BIG:
2026 new_status = DID_ERROR;
2027 break;
2028 case CAM_REQUEUE_REQ:
2029 new_status = DID_REQUEUE;
2030 break;
2031 default:
2032 /* We should never get here */
2033 new_status = DID_ERROR;
2034 break;
2035 }
2036
2037 if (do_fallback) {
2038 printf("%s: device overrun (status %x) on %d:%d:%d\n",
2039 ahd_name(ahd), status, cmd->device->channel,
2040 cmd->device->id, cmd->device->lun);
2041 }
2042
2043 ahd_cmd_set_transaction_status(cmd, new_status);
2044
2045 cmd->scsi_done(cmd);
2046 }
2047
2048 void
2049 ahd_freeze_simq(struct ahd_softc *ahd)
2050 {
2051 scsi_block_requests(ahd->platform_data->host);
2052 }
2053
2054 void
2055 ahd_release_simq(struct ahd_softc *ahd)
2056 {
2057 scsi_unblock_requests(ahd->platform_data->host);
2058 }
2059
2060 static int
2061 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2062 {
2063 struct ahd_softc *ahd;
2064 struct ahd_linux_device *dev;
2065 struct scb *pending_scb;
2066 u_int saved_scbptr;
2067 u_int active_scbptr;
2068 u_int last_phase;
2069 u_int saved_scsiid;
2070 u_int cdb_byte;
2071 int retval;
2072 int was_paused;
2073 int paused;
2074 int wait;
2075 int disconnected;
2076 ahd_mode_state saved_modes;
2077 unsigned long flags;
2078
2079 pending_scb = NULL;
2080 paused = FALSE;
2081 wait = FALSE;
2082 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2083
2084 scmd_printk(KERN_INFO, cmd,
2085 "Attempting to queue an ABORT message:");
2086
2087 printf("CDB:");
2088 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2089 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2090 printf("\n");
2091
2092 ahd_lock(ahd, &flags);
2093
2094 /*
2095 * First determine if we currently own this command.
2096 * Start by searching the device queue. If not found
2097 * there, check the pending_scb list. If not found
2098 * at all, and the system wanted us to just abort the
2099 * command, return success.
2100 */
2101 dev = scsi_transport_device_data(cmd->device);
2102
2103 if (dev == NULL) {
2104 /*
2105 * No target device for this command exists,
2106 * so we must not still own the command.
2107 */
2108 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2109 retval = SUCCESS;
2110 goto no_cmd;
2111 }
2112
2113 /*
2114 * See if we can find a matching cmd in the pending list.
2115 */
2116 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2117 if (pending_scb->io_ctx == cmd)
2118 break;
2119 }
2120
2121 if (pending_scb == NULL) {
2122 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2123 goto no_cmd;
2124 }
2125
2126 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2127 /*
2128 * We can't queue two recovery actions using the same SCB
2129 */
2130 retval = FAILED;
2131 goto done;
2132 }
2133
2134 /*
2135 * Ensure that the card doesn't do anything
2136 * behind our back. Also make sure that we
2137 * didn't "just" miss an interrupt that would
2138 * affect this cmd.
2139 */
2140 was_paused = ahd_is_paused(ahd);
2141 ahd_pause_and_flushwork(ahd);
2142 paused = TRUE;
2143
2144 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2145 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2146 goto no_cmd;
2147 }
2148
2149 printf("%s: At time of recovery, card was %spaused\n",
2150 ahd_name(ahd), was_paused ? "" : "not ");
2151 ahd_dump_card_state(ahd);
2152
2153 disconnected = TRUE;
2154 if (ahd_search_qinfifo(ahd, cmd->device->id,
2155 cmd->device->channel + 'A',
2156 cmd->device->lun,
2157 pending_scb->hscb->tag,
2158 ROLE_INITIATOR, CAM_REQ_ABORTED,
2159 SEARCH_COMPLETE) > 0) {
2160 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2161 ahd_name(ahd), cmd->device->channel,
2162 cmd->device->id, cmd->device->lun);
2163 retval = SUCCESS;
2164 goto done;
2165 }
2166
2167 saved_modes = ahd_save_modes(ahd);
2168 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2169 last_phase = ahd_inb(ahd, LASTPHASE);
2170 saved_scbptr = ahd_get_scbptr(ahd);
2171 active_scbptr = saved_scbptr;
2172 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2173 struct scb *bus_scb;
2174
2175 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2176 if (bus_scb == pending_scb)
2177 disconnected = FALSE;
2178 }
2179
2180 /*
2181 * At this point, pending_scb is the scb associated with the
2182 * passed in command. That command is currently active on the
2183 * bus or is in the disconnected state.
2184 */
2185 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2186 if (last_phase != P_BUSFREE
2187 && SCB_GET_TAG(pending_scb) == active_scbptr) {
2188
2189 /*
2190 * We're active on the bus, so assert ATN
2191 * and hope that the target responds.
2192 */
2193 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2194 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2195 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2196 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2197 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2198 wait = TRUE;
2199 } else if (disconnected) {
2200
2201 /*
2202 * Actually re-queue this SCB in an attempt
2203 * to select the device before it reconnects.
2204 */
2205 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2206 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2207 pending_scb->hscb->cdb_len = 0;
2208 pending_scb->hscb->task_attribute = 0;
2209 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2210
2211 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2212 /*
2213 * Mark the SCB has having an outstanding
2214 * task management function. Should the command
2215 * complete normally before the task management
2216 * function can be sent, the host will be notified
2217 * to abort our requeued SCB.
2218 */
2219 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2220 pending_scb->hscb->task_management);
2221 } else {
2222 /*
2223 * If non-packetized, set the MK_MESSAGE control
2224 * bit indicating that we desire to send a message.
2225 * We also set the disconnected flag since there is
2226 * no guarantee that our SCB control byte matches
2227 * the version on the card. We don't want the
2228 * sequencer to abort the command thinking an
2229 * unsolicited reselection occurred.
2230 */
2231 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2232
2233 /*
2234 * The sequencer will never re-reference the
2235 * in-core SCB. To make sure we are notified
2236 * during reslection, set the MK_MESSAGE flag in
2237 * the card's copy of the SCB.
2238 */
2239 ahd_outb(ahd, SCB_CONTROL,
2240 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2241 }
2242
2243 /*
2244 * Clear out any entries in the QINFIFO first
2245 * so we are the next SCB for this target
2246 * to run.
2247 */
2248 ahd_search_qinfifo(ahd, cmd->device->id,
2249 cmd->device->channel + 'A', cmd->device->lun,
2250 SCB_LIST_NULL, ROLE_INITIATOR,
2251 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2252 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2253 ahd_set_scbptr(ahd, saved_scbptr);
2254 ahd_print_path(ahd, pending_scb);
2255 printf("Device is disconnected, re-queuing SCB\n");
2256 wait = TRUE;
2257 } else {
2258 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2259 retval = FAILED;
2260 goto done;
2261 }
2262
2263 no_cmd:
2264 /*
2265 * Our assumption is that if we don't have the command, no
2266 * recovery action was required, so we return success. Again,
2267 * the semantics of the mid-layer recovery engine are not
2268 * well defined, so this may change in time.
2269 */
2270 retval = SUCCESS;
2271 done:
2272 if (paused)
2273 ahd_unpause(ahd);
2274 if (wait) {
2275 DECLARE_COMPLETION(done);
2276
2277 ahd->platform_data->eh_done = &done;
2278 ahd_unlock(ahd, &flags);
2279
2280 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
2281 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2282 ahd_lock(ahd, &flags);
2283 ahd->platform_data->eh_done = NULL;
2284 ahd_unlock(ahd, &flags);
2285 printf("%s: Timer Expired (active %d)\n",
2286 ahd_name(ahd), dev->active);
2287 retval = FAILED;
2288 }
2289 printf("Recovery code awake\n");
2290 } else
2291 ahd_unlock(ahd, &flags);
2292
2293 if (retval != SUCCESS)
2294 printf("%s: Command abort returning 0x%x\n",
2295 ahd_name(ahd), retval);
2296
2297 return retval;
2298 }
2299
2300 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2301 {
2302 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2303 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2304 struct ahd_devinfo devinfo;
2305 unsigned long flags;
2306
2307 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2308 starget->channel + 'A', ROLE_INITIATOR);
2309 ahd_lock(ahd, &flags);
2310 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2311 ahd_unlock(ahd, &flags);
2312 }
2313
2314 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2315 {
2316 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2317 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2318 struct ahd_tmode_tstate *tstate;
2319 struct ahd_initiator_tinfo *tinfo
2320 = ahd_fetch_transinfo(ahd,
2321 starget->channel + 'A',
2322 shost->this_id, starget->id, &tstate);
2323 struct ahd_devinfo devinfo;
2324 unsigned int ppr_options = tinfo->goal.ppr_options;
2325 unsigned int dt;
2326 unsigned long flags;
2327 unsigned long offset = tinfo->goal.offset;
2328
2329 #ifdef AHD_DEBUG
2330 if ((ahd_debug & AHD_SHOW_DV) != 0)
2331 printf("%s: set period to %d\n", ahd_name(ahd), period);
2332 #endif
2333 if (offset == 0)
2334 offset = MAX_OFFSET;
2335
2336 if (period < 8)
2337 period = 8;
2338 if (period < 10) {
2339 ppr_options |= MSG_EXT_PPR_DT_REQ;
2340 if (period == 8)
2341 ppr_options |= MSG_EXT_PPR_IU_REQ;
2342 }
2343
2344 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2345
2346 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2347 starget->channel + 'A', ROLE_INITIATOR);
2348
2349 /* all PPR requests apart from QAS require wide transfers */
2350 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2351 if (spi_width(starget) == 0)
2352 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2353 }
2354
2355 ahd_find_syncrate(ahd, &period, &ppr_options,
2356 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2357
2358 ahd_lock(ahd, &flags);
2359 ahd_set_syncrate(ahd, &devinfo, period, offset,
2360 ppr_options, AHD_TRANS_GOAL, FALSE);
2361 ahd_unlock(ahd, &flags);
2362 }
2363
2364 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2365 {
2366 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2367 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2368 struct ahd_tmode_tstate *tstate;
2369 struct ahd_initiator_tinfo *tinfo
2370 = ahd_fetch_transinfo(ahd,
2371 starget->channel + 'A',
2372 shost->this_id, starget->id, &tstate);
2373 struct ahd_devinfo devinfo;
2374 unsigned int ppr_options = 0;
2375 unsigned int period = 0;
2376 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2377 unsigned long flags;
2378
2379 #ifdef AHD_DEBUG
2380 if ((ahd_debug & AHD_SHOW_DV) != 0)
2381 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2382 #endif
2383
2384 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2385 starget->channel + 'A', ROLE_INITIATOR);
2386 if (offset != 0) {
2387 period = tinfo->goal.period;
2388 ppr_options = tinfo->goal.ppr_options;
2389 ahd_find_syncrate(ahd, &period, &ppr_options,
2390 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2391 }
2392
2393 ahd_lock(ahd, &flags);
2394 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2395 AHD_TRANS_GOAL, FALSE);
2396 ahd_unlock(ahd, &flags);
2397 }
2398
2399 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2400 {
2401 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2402 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2403 struct ahd_tmode_tstate *tstate;
2404 struct ahd_initiator_tinfo *tinfo
2405 = ahd_fetch_transinfo(ahd,
2406 starget->channel + 'A',
2407 shost->this_id, starget->id, &tstate);
2408 struct ahd_devinfo devinfo;
2409 unsigned int ppr_options = tinfo->goal.ppr_options
2410 & ~MSG_EXT_PPR_DT_REQ;
2411 unsigned int period = tinfo->goal.period;
2412 unsigned int width = tinfo->goal.width;
2413 unsigned long flags;
2414
2415 #ifdef AHD_DEBUG
2416 if ((ahd_debug & AHD_SHOW_DV) != 0)
2417 printf("%s: %s DT\n", ahd_name(ahd),
2418 dt ? "enabling" : "disabling");
2419 #endif
2420 if (dt) {
2421 ppr_options |= MSG_EXT_PPR_DT_REQ;
2422 if (!width)
2423 ahd_linux_set_width(starget, 1);
2424 } else {
2425 if (period <= 9)
2426 period = 10; /* If resetting DT, period must be >= 25ns */
2427 /* IU is invalid without DT set */
2428 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2429 }
2430 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2431 starget->channel + 'A', ROLE_INITIATOR);
2432 ahd_find_syncrate(ahd, &period, &ppr_options,
2433 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2434
2435 ahd_lock(ahd, &flags);
2436 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2437 ppr_options, AHD_TRANS_GOAL, FALSE);
2438 ahd_unlock(ahd, &flags);
2439 }
2440
2441 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2442 {
2443 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2444 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2445 struct ahd_tmode_tstate *tstate;
2446 struct ahd_initiator_tinfo *tinfo
2447 = ahd_fetch_transinfo(ahd,
2448 starget->channel + 'A',
2449 shost->this_id, starget->id, &tstate);
2450 struct ahd_devinfo devinfo;
2451 unsigned int ppr_options = tinfo->goal.ppr_options
2452 & ~MSG_EXT_PPR_QAS_REQ;
2453 unsigned int period = tinfo->goal.period;
2454 unsigned int dt;
2455 unsigned long flags;
2456
2457 #ifdef AHD_DEBUG
2458 if ((ahd_debug & AHD_SHOW_DV) != 0)
2459 printf("%s: %s QAS\n", ahd_name(ahd),
2460 qas ? "enabling" : "disabling");
2461 #endif
2462
2463 if (qas) {
2464 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2465 }
2466
2467 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2468
2469 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2470 starget->channel + 'A', ROLE_INITIATOR);
2471 ahd_find_syncrate(ahd, &period, &ppr_options,
2472 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2473
2474 ahd_lock(ahd, &flags);
2475 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2476 ppr_options, AHD_TRANS_GOAL, FALSE);
2477 ahd_unlock(ahd, &flags);
2478 }
2479
2480 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2481 {
2482 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2483 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2484 struct ahd_tmode_tstate *tstate;
2485 struct ahd_initiator_tinfo *tinfo
2486 = ahd_fetch_transinfo(ahd,
2487 starget->channel + 'A',
2488 shost->this_id, starget->id, &tstate);
2489 struct ahd_devinfo devinfo;
2490 unsigned int ppr_options = tinfo->goal.ppr_options
2491 & ~MSG_EXT_PPR_IU_REQ;
2492 unsigned int period = tinfo->goal.period;
2493 unsigned int dt;
2494 unsigned long flags;
2495
2496 #ifdef AHD_DEBUG
2497 if ((ahd_debug & AHD_SHOW_DV) != 0)
2498 printf("%s: %s IU\n", ahd_name(ahd),
2499 iu ? "enabling" : "disabling");
2500 #endif
2501
2502 if (iu) {
2503 ppr_options |= MSG_EXT_PPR_IU_REQ;
2504 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2505 }
2506
2507 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2508
2509 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2510 starget->channel + 'A', ROLE_INITIATOR);
2511 ahd_find_syncrate(ahd, &period, &ppr_options,
2512 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2513
2514 ahd_lock(ahd, &flags);
2515 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2516 ppr_options, AHD_TRANS_GOAL, FALSE);
2517 ahd_unlock(ahd, &flags);
2518 }
2519
2520 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2521 {
2522 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2523 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2524 struct ahd_tmode_tstate *tstate;
2525 struct ahd_initiator_tinfo *tinfo
2526 = ahd_fetch_transinfo(ahd,
2527 starget->channel + 'A',
2528 shost->this_id, starget->id, &tstate);
2529 struct ahd_devinfo devinfo;
2530 unsigned int ppr_options = tinfo->goal.ppr_options
2531 & ~MSG_EXT_PPR_RD_STRM;
2532 unsigned int period = tinfo->goal.period;
2533 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2534 unsigned long flags;
2535
2536 #ifdef AHD_DEBUG
2537 if ((ahd_debug & AHD_SHOW_DV) != 0)
2538 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2539 rdstrm ? "enabling" : "disabling");
2540 #endif
2541
2542 if (rdstrm)
2543 ppr_options |= MSG_EXT_PPR_RD_STRM;
2544
2545 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2546 starget->channel + 'A', ROLE_INITIATOR);
2547 ahd_find_syncrate(ahd, &period, &ppr_options,
2548 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2549
2550 ahd_lock(ahd, &flags);
2551 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2552 ppr_options, AHD_TRANS_GOAL, FALSE);
2553 ahd_unlock(ahd, &flags);
2554 }
2555
2556 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2557 {
2558 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2559 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2560 struct ahd_tmode_tstate *tstate;
2561 struct ahd_initiator_tinfo *tinfo
2562 = ahd_fetch_transinfo(ahd,
2563 starget->channel + 'A',
2564 shost->this_id, starget->id, &tstate);
2565 struct ahd_devinfo devinfo;
2566 unsigned int ppr_options = tinfo->goal.ppr_options
2567 & ~MSG_EXT_PPR_WR_FLOW;
2568 unsigned int period = tinfo->goal.period;
2569 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2570 unsigned long flags;
2571
2572 #ifdef AHD_DEBUG
2573 if ((ahd_debug & AHD_SHOW_DV) != 0)
2574 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2575 wrflow ? "enabling" : "disabling");
2576 #endif
2577
2578 if (wrflow)
2579 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2580
2581 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2582 starget->channel + 'A', ROLE_INITIATOR);
2583 ahd_find_syncrate(ahd, &period, &ppr_options,
2584 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2585
2586 ahd_lock(ahd, &flags);
2587 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2588 ppr_options, AHD_TRANS_GOAL, FALSE);
2589 ahd_unlock(ahd, &flags);
2590 }
2591
2592 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2593 {
2594 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2595 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2596 struct ahd_tmode_tstate *tstate;
2597 struct ahd_initiator_tinfo *tinfo
2598 = ahd_fetch_transinfo(ahd,
2599 starget->channel + 'A',
2600 shost->this_id, starget->id, &tstate);
2601 struct ahd_devinfo devinfo;
2602 unsigned int ppr_options = tinfo->goal.ppr_options
2603 & ~MSG_EXT_PPR_RTI;
2604 unsigned int period = tinfo->goal.period;
2605 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2606 unsigned long flags;
2607
2608 if ((ahd->features & AHD_RTI) == 0) {
2609 #ifdef AHD_DEBUG
2610 if ((ahd_debug & AHD_SHOW_DV) != 0)
2611 printf("%s: RTI not available\n", ahd_name(ahd));
2612 #endif
2613 return;
2614 }
2615
2616 #ifdef AHD_DEBUG
2617 if ((ahd_debug & AHD_SHOW_DV) != 0)
2618 printf("%s: %s RTI\n", ahd_name(ahd),
2619 rti ? "enabling" : "disabling");
2620 #endif
2621
2622 if (rti)
2623 ppr_options |= MSG_EXT_PPR_RTI;
2624
2625 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2626 starget->channel + 'A', ROLE_INITIATOR);
2627 ahd_find_syncrate(ahd, &period, &ppr_options,
2628 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2629
2630 ahd_lock(ahd, &flags);
2631 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2632 ppr_options, AHD_TRANS_GOAL, FALSE);
2633 ahd_unlock(ahd, &flags);
2634 }
2635
2636 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2637 {
2638 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2639 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2640 struct ahd_tmode_tstate *tstate;
2641 struct ahd_initiator_tinfo *tinfo
2642 = ahd_fetch_transinfo(ahd,
2643 starget->channel + 'A',
2644 shost->this_id, starget->id, &tstate);
2645 struct ahd_devinfo devinfo;
2646 unsigned int ppr_options = tinfo->goal.ppr_options
2647 & ~MSG_EXT_PPR_PCOMP_EN;
2648 unsigned int period = tinfo->goal.period;
2649 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2650 unsigned long flags;
2651
2652 #ifdef AHD_DEBUG
2653 if ((ahd_debug & AHD_SHOW_DV) != 0)
2654 printf("%s: %s Precompensation\n", ahd_name(ahd),
2655 pcomp ? "Enable" : "Disable");
2656 #endif
2657
2658 if (pcomp)
2659 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2660
2661 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2662 starget->channel + 'A', ROLE_INITIATOR);
2663 ahd_find_syncrate(ahd, &period, &ppr_options,
2664 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2665
2666 ahd_lock(ahd, &flags);
2667 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2668 ppr_options, AHD_TRANS_GOAL, FALSE);
2669 ahd_unlock(ahd, &flags);
2670 }
2671
2672 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2673 {
2674 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2675 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2676 struct ahd_tmode_tstate *tstate;
2677 struct ahd_initiator_tinfo *tinfo
2678 = ahd_fetch_transinfo(ahd,
2679 starget->channel + 'A',
2680 shost->this_id, starget->id, &tstate);
2681 struct ahd_devinfo devinfo;
2682 unsigned int ppr_options = tinfo->goal.ppr_options
2683 & ~MSG_EXT_PPR_HOLD_MCS;
2684 unsigned int period = tinfo->goal.period;
2685 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2686 unsigned long flags;
2687
2688 if (hold)
2689 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2690
2691 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2692 starget->channel + 'A', ROLE_INITIATOR);
2693 ahd_find_syncrate(ahd, &period, &ppr_options,
2694 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2695
2696 ahd_lock(ahd, &flags);
2697 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2698 ppr_options, AHD_TRANS_GOAL, FALSE);
2699 ahd_unlock(ahd, &flags);
2700 }
2701
2702
2703
2704 static struct spi_function_template ahd_linux_transport_functions = {
2705 .set_offset = ahd_linux_set_offset,
2706 .show_offset = 1,
2707 .set_period = ahd_linux_set_period,
2708 .show_period = 1,
2709 .set_width = ahd_linux_set_width,
2710 .show_width = 1,
2711 .set_dt = ahd_linux_set_dt,
2712 .show_dt = 1,
2713 .set_iu = ahd_linux_set_iu,
2714 .show_iu = 1,
2715 .set_qas = ahd_linux_set_qas,
2716 .show_qas = 1,
2717 .set_rd_strm = ahd_linux_set_rd_strm,
2718 .show_rd_strm = 1,
2719 .set_wr_flow = ahd_linux_set_wr_flow,
2720 .show_wr_flow = 1,
2721 .set_rti = ahd_linux_set_rti,
2722 .show_rti = 1,
2723 .set_pcomp_en = ahd_linux_set_pcomp_en,
2724 .show_pcomp_en = 1,
2725 .set_hold_mcs = ahd_linux_set_hold_mcs,
2726 .show_hold_mcs = 1,
2727 };
2728
2729 static int __init
2730 ahd_linux_init(void)
2731 {
2732 int error = 0;
2733
2734 /*
2735 * If we've been passed any parameters, process them now.
2736 */
2737 if (aic79xx)
2738 aic79xx_setup(aic79xx);
2739
2740 ahd_linux_transport_template =
2741 spi_attach_transport(&ahd_linux_transport_functions);
2742 if (!ahd_linux_transport_template)
2743 return -ENODEV;
2744
2745 scsi_transport_reserve_device(ahd_linux_transport_template,
2746 sizeof(struct ahd_linux_device));
2747
2748 error = ahd_linux_pci_init();
2749 if (error)
2750 spi_release_transport(ahd_linux_transport_template);
2751 return error;
2752 }
2753
2754 static void __exit
2755 ahd_linux_exit(void)
2756 {
2757 ahd_linux_pci_exit();
2758 spi_release_transport(ahd_linux_transport_template);
2759 }
2760
2761 module_init(ahd_linux_init);
2762 module_exit(ahd_linux_exit);
linux 2.6 git repository for openrd