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ia64/kvm: compilation fix. export account_system_vtime.
[pv_ops_mirror.git] / drivers / scsi / aic7xxx / aic79xx_osm.c
blob0f829b3b8ab75e0f990e420045bd7007b4f6855f
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 const struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
197 {
198 AIC79XX_DEFAULT_IOOPTS,
199 AIC79XX_DEFAULT_IOOPTS,
200 AIC79XX_DEFAULT_IOOPTS,
201 AIC79XX_DEFAULT_IOOPTS,
202 AIC79XX_DEFAULT_IOOPTS,
203 AIC79XX_DEFAULT_IOOPTS,
204 AIC79XX_DEFAULT_IOOPTS,
205 AIC79XX_DEFAULT_IOOPTS,
206 AIC79XX_DEFAULT_IOOPTS,
207 AIC79XX_DEFAULT_IOOPTS,
208 AIC79XX_DEFAULT_IOOPTS,
209 AIC79XX_DEFAULT_IOOPTS,
210 AIC79XX_DEFAULT_IOOPTS,
211 AIC79XX_DEFAULT_IOOPTS,
212 AIC79XX_DEFAULT_IOOPTS,
213 AIC79XX_DEFAULT_IOOPTS
214 };
215
216 /*
217 * There should be a specific return value for this in scsi.h, but
218 * it seems that most drivers ignore it.
219 */
220 #define DID_UNDERFLOW DID_ERROR
221
222 void
223 ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
224 {
225 printk("(scsi%d:%c:%d:%d): ",
226 ahd->platform_data->host->host_no,
227 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
228 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
229 scb != NULL ? SCB_GET_LUN(scb) : -1);
230 }
231
232 /*
233 * XXX - these options apply unilaterally to _all_ adapters
234 * cards in the system. This should be fixed. Exceptions to this
235 * rule are noted in the comments.
236 */
237
238 /*
239 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
240 * has no effect on any later resets that might occur due to things like
241 * SCSI bus timeouts.
242 */
243 static uint32_t aic79xx_no_reset;
244
245 /*
246 * Should we force EXTENDED translation on a controller.
247 * 0 == Use whatever is in the SEEPROM or default to off
248 * 1 == Use whatever is in the SEEPROM or default to on
249 */
250 static uint32_t aic79xx_extended;
251
252 /*
253 * PCI bus parity checking of the Adaptec controllers. This is somewhat
254 * dubious at best. To my knowledge, this option has never actually
255 * solved a PCI parity problem, but on certain machines with broken PCI
256 * chipset configurations, it can generate tons of false error messages.
257 * It's included in the driver for completeness.
258 * 0 = Shut off PCI parity check
259 * non-0 = Enable PCI parity check
260 *
261 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
262 * variable to -1 you would actually want to simply pass the variable
263 * name without a number. That will invert the 0 which will result in
264 * -1.
265 */
266 static uint32_t aic79xx_pci_parity = ~0;
267
268 /*
269 * There are lots of broken chipsets in the world. Some of them will
270 * violate the PCI spec when we issue byte sized memory writes to our
271 * controller. I/O mapped register access, if allowed by the given
272 * platform, will work in almost all cases.
273 */
274 uint32_t aic79xx_allow_memio = ~0;
275
276 /*
277 * So that we can set how long each device is given as a selection timeout.
278 * The table of values goes like this:
279 * 0 - 256ms
280 * 1 - 128ms
281 * 2 - 64ms
282 * 3 - 32ms
283 * We default to 256ms because some older devices need a longer time
284 * to respond to initial selection.
285 */
286 static uint32_t aic79xx_seltime;
287
288 /*
289 * Certain devices do not perform any aging on commands. Should the
290 * device be saturated by commands in one portion of the disk, it is
291 * possible for transactions on far away sectors to never be serviced.
292 * To handle these devices, we can periodically send an ordered tag to
293 * force all outstanding transactions to be serviced prior to a new
294 * transaction.
295 */
296 static uint32_t aic79xx_periodic_otag;
297
298 /* Some storage boxes are using an LSI chip which has a bug making it
299 * impossible to use aic79xx Rev B chip in 320 speeds. The following
300 * storage boxes have been reported to be buggy:
301 * EonStor 3U 16-Bay: U16U-G3A3
302 * EonStor 2U 12-Bay: U12U-G3A3
303 * SentinelRAID: 2500F R5 / R6
304 * SentinelRAID: 2500F R1
305 * SentinelRAID: 2500F/1500F
306 * SentinelRAID: 150F
307 *
308 * To get around this LSI bug, you can set your board to 160 mode
309 * or you can enable the SLOWCRC bit.
310 */
311 uint32_t aic79xx_slowcrc;
312
313 /*
314 * Module information and settable options.
315 */
316 static char *aic79xx = NULL;
317
318 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
319 MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver");
320 MODULE_LICENSE("Dual BSD/GPL");
321 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
322 module_param(aic79xx, charp, 0444);
323 MODULE_PARM_DESC(aic79xx,
324 "period-delimited options string:\n"
325 " verbose Enable verbose/diagnostic logging\n"
326 " allow_memio Allow device registers to be memory mapped\n"
327 " debug Bitmask of debug values to enable\n"
328 " no_reset Suppress initial bus resets\n"
329 " extended Enable extended geometry on all controllers\n"
330 " periodic_otag Send an ordered tagged transaction\n"
331 " periodically to prevent tag starvation.\n"
332 " This may be required by some older disk\n"
333 " or drives/RAID arrays.\n"
334 " tag_info:<tag_str> Set per-target tag depth\n"
335 " global_tag_depth:<int> Global tag depth for all targets on all buses\n"
336 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
337 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
338 " amplitude:<int> Set the signal amplitude (0-7).\n"
339 " seltime:<int> Selection Timeout:\n"
340 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
341 " slowcrc Turn on the SLOWCRC bit (Rev B only)\n"
342 "\n"
343 " Sample /etc/modprobe.conf line:\n"
344 " Enable verbose logging\n"
345 " Set tag depth on Controller 2/Target 2 to 10 tags\n"
346 " Shorten the selection timeout to 128ms\n"
347 "\n"
348 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
349 );
350
351 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
352 struct scsi_device *,
353 struct scb *);
354 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
355 struct scsi_cmnd *cmd);
356 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
357 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
358 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
359 struct ahd_devinfo *devinfo);
360 static void ahd_linux_device_queue_depth(struct scsi_device *);
361 static int ahd_linux_run_command(struct ahd_softc*,
362 struct ahd_linux_device *,
363 struct scsi_cmnd *);
364 static void ahd_linux_setup_tag_info_global(char *p);
365 static int aic79xx_setup(char *c);
366 static void ahd_freeze_simq(struct ahd_softc *ahd);
367 static void ahd_release_simq(struct ahd_softc *ahd);
368
369 static int ahd_linux_unit;
370
371
372 /************************** OS Utility Wrappers *******************************/
373 void ahd_delay(long);
374 void
375 ahd_delay(long usec)
376 {
377 /*
378 * udelay on Linux can have problems for
379 * multi-millisecond waits. Wait at most
380 * 1024us per call.
381 */
382 while (usec > 0) {
383 udelay(usec % 1024);
384 usec -= 1024;
385 }
386 }
387
388
389 /***************************** Low Level I/O **********************************/
390 uint8_t ahd_inb(struct ahd_softc * ahd, long port);
391 void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
392 void ahd_outw_atomic(struct ahd_softc * ahd,
393 long port, uint16_t val);
394 void ahd_outsb(struct ahd_softc * ahd, long port,
395 uint8_t *, int count);
396 void ahd_insb(struct ahd_softc * ahd, long port,
397 uint8_t *, int count);
398
399 uint8_t
400 ahd_inb(struct ahd_softc * ahd, long port)
401 {
402 uint8_t x;
403
404 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
405 x = readb(ahd->bshs[0].maddr + port);
406 } else {
407 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
408 }
409 mb();
410 return (x);
411 }
412
413 #if 0 /* unused */
414 static uint16_t
415 ahd_inw_atomic(struct ahd_softc * ahd, long port)
416 {
417 uint8_t x;
418
419 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
420 x = readw(ahd->bshs[0].maddr + port);
421 } else {
422 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
423 }
424 mb();
425 return (x);
426 }
427 #endif
428
429 void
430 ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)
431 {
432 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
433 writeb(val, ahd->bshs[0].maddr + port);
434 } else {
435 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
436 }
437 mb();
438 }
439
440 void
441 ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)
442 {
443 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
444 writew(val, ahd->bshs[0].maddr + port);
445 } else {
446 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
447 }
448 mb();
449 }
450
451 void
452 ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
453 {
454 int i;
455
456 /*
457 * There is probably a more efficient way to do this on Linux
458 * but we don't use this for anything speed critical and this
459 * should work.
460 */
461 for (i = 0; i < count; i++)
462 ahd_outb(ahd, port, *array++);
463 }
464
465 void
466 ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
467 {
468 int i;
469
470 /*
471 * There is probably a more efficient way to do this on Linux
472 * but we don't use this for anything speed critical and this
473 * should work.
474 */
475 for (i = 0; i < count; i++)
476 *array++ = ahd_inb(ahd, port);
477 }
478
479 /******************************* PCI Routines *********************************/
480 uint32_t
481 ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)
482 {
483 switch (width) {
484 case 1:
485 {
486 uint8_t retval;
487
488 pci_read_config_byte(pci, reg, &retval);
489 return (retval);
490 }
491 case 2:
492 {
493 uint16_t retval;
494 pci_read_config_word(pci, reg, &retval);
495 return (retval);
496 }
497 case 4:
498 {
499 uint32_t retval;
500 pci_read_config_dword(pci, reg, &retval);
501 return (retval);
502 }
503 default:
504 panic("ahd_pci_read_config: Read size too big");
505 /* NOTREACHED */
506 return (0);
507 }
508 }
509
510 void
511 ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)
512 {
513 switch (width) {
514 case 1:
515 pci_write_config_byte(pci, reg, value);
516 break;
517 case 2:
518 pci_write_config_word(pci, reg, value);
519 break;
520 case 4:
521 pci_write_config_dword(pci, reg, value);
522 break;
523 default:
524 panic("ahd_pci_write_config: Write size too big");
525 /* NOTREACHED */
526 }
527 }
528
529 /****************************** Inlines ***************************************/
530 static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
531
532 static void
533 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
534 {
535 struct scsi_cmnd *cmd;
536
537 cmd = scb->io_ctx;
538 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
539 scsi_dma_unmap(cmd);
540 }
541
542 /******************************** Macros **************************************/
543 #define BUILD_SCSIID(ahd, cmd) \
544 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
545
546 /*
547 * Return a string describing the driver.
548 */
549 static const char *
550 ahd_linux_info(struct Scsi_Host *host)
551 {
552 static char buffer[512];
553 char ahd_info[256];
554 char *bp;
555 struct ahd_softc *ahd;
556
557 bp = &buffer[0];
558 ahd = *(struct ahd_softc **)host->hostdata;
559 memset(bp, 0, sizeof(buffer));
560 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n"
561 " <");
562 strcat(bp, ahd->description);
563 strcat(bp, ">\n"
564 " ");
565 ahd_controller_info(ahd, ahd_info);
566 strcat(bp, ahd_info);
567
568 return (bp);
569 }
570
571 /*
572 * Queue an SCB to the controller.
573 */
574 static int
575 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
576 {
577 struct ahd_softc *ahd;
578 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
579 int rtn = SCSI_MLQUEUE_HOST_BUSY;
580
581 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
582
583 cmd->scsi_done = scsi_done;
584 cmd->result = CAM_REQ_INPROG << 16;
585 rtn = ahd_linux_run_command(ahd, dev, cmd);
586
587 return rtn;
588 }
589
590 static struct scsi_target **
591 ahd_linux_target_in_softc(struct scsi_target *starget)
592 {
593 struct ahd_softc *ahd =
594 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
595 unsigned int target_offset;
596
597 target_offset = starget->id;
598 if (starget->channel != 0)
599 target_offset += 8;
600
601 return &ahd->platform_data->starget[target_offset];
602 }
603
604 static int
605 ahd_linux_target_alloc(struct scsi_target *starget)
606 {
607 struct ahd_softc *ahd =
608 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
609 struct seeprom_config *sc = ahd->seep_config;
610 unsigned long flags;
611 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
612 struct ahd_devinfo devinfo;
613 struct ahd_initiator_tinfo *tinfo;
614 struct ahd_tmode_tstate *tstate;
615 char channel = starget->channel + 'A';
616
617 ahd_lock(ahd, &flags);
618
619 BUG_ON(*ahd_targp != NULL);
620
621 *ahd_targp = starget;
622
623 if (sc) {
624 int flags = sc->device_flags[starget->id];
625
626 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
627 starget->id, &tstate);
628
629 if ((flags & CFPACKETIZED) == 0) {
630 /* Do not negotiate packetized transfers */
631 spi_rd_strm(starget) = 0;
632 spi_pcomp_en(starget) = 0;
633 spi_rti(starget) = 0;
634 spi_wr_flow(starget) = 0;
635 spi_hold_mcs(starget) = 0;
636 } else {
637 if ((ahd->features & AHD_RTI) == 0)
638 spi_rti(starget) = 0;
639 }
640
641 if ((flags & CFQAS) == 0)
642 spi_qas(starget) = 0;
643
644 /* Transinfo values have been set to BIOS settings */
645 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
646 spi_min_period(starget) = tinfo->user.period;
647 spi_max_offset(starget) = tinfo->user.offset;
648 }
649
650 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
651 starget->id, &tstate);
652 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
653 CAM_LUN_WILDCARD, channel,
654 ROLE_INITIATOR);
655 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
656 AHD_TRANS_GOAL, /*paused*/FALSE);
657 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
658 AHD_TRANS_GOAL, /*paused*/FALSE);
659 ahd_unlock(ahd, &flags);
660
661 return 0;
662 }
663
664 static void
665 ahd_linux_target_destroy(struct scsi_target *starget)
666 {
667 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
668
669 *ahd_targp = NULL;
670 }
671
672 static int
673 ahd_linux_slave_alloc(struct scsi_device *sdev)
674 {
675 struct ahd_softc *ahd =
676 *((struct ahd_softc **)sdev->host->hostdata);
677 struct ahd_linux_device *dev;
678
679 if (bootverbose)
680 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
681
682 dev = scsi_transport_device_data(sdev);
683 memset(dev, 0, sizeof(*dev));
684
685 /*
686 * We start out life using untagged
687 * transactions of which we allow one.
688 */
689 dev->openings = 1;
690
691 /*
692 * Set maxtags to 0. This will be changed if we
693 * later determine that we are dealing with
694 * a tagged queuing capable device.
695 */
696 dev->maxtags = 0;
697
698 return (0);
699 }
700
701 static int
702 ahd_linux_slave_configure(struct scsi_device *sdev)
703 {
704 struct ahd_softc *ahd;
705
706 ahd = *((struct ahd_softc **)sdev->host->hostdata);
707 if (bootverbose)
708 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
709
710 ahd_linux_device_queue_depth(sdev);
711
712 /* Initial Domain Validation */
713 if (!spi_initial_dv(sdev->sdev_target))
714 spi_dv_device(sdev);
715
716 return 0;
717 }
718
719 #if defined(__i386__)
720 /*
721 * Return the disk geometry for the given SCSI device.
722 */
723 static int
724 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
725 sector_t capacity, int geom[])
726 {
727 uint8_t *bh;
728 int heads;
729 int sectors;
730 int cylinders;
731 int ret;
732 int extended;
733 struct ahd_softc *ahd;
734
735 ahd = *((struct ahd_softc **)sdev->host->hostdata);
736
737 bh = scsi_bios_ptable(bdev);
738 if (bh) {
739 ret = scsi_partsize(bh, capacity,
740 &geom[2], &geom[0], &geom[1]);
741 kfree(bh);
742 if (ret != -1)
743 return (ret);
744 }
745 heads = 64;
746 sectors = 32;
747 cylinders = aic_sector_div(capacity, heads, sectors);
748
749 if (aic79xx_extended != 0)
750 extended = 1;
751 else
752 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
753 if (extended && cylinders >= 1024) {
754 heads = 255;
755 sectors = 63;
756 cylinders = aic_sector_div(capacity, heads, sectors);
757 }
758 geom[0] = heads;
759 geom[1] = sectors;
760 geom[2] = cylinders;
761 return (0);
762 }
763 #endif
764
765 /*
766 * Abort the current SCSI command(s).
767 */
768 static int
769 ahd_linux_abort(struct scsi_cmnd *cmd)
770 {
771 int error;
772
773 error = ahd_linux_queue_abort_cmd(cmd);
774
775 return error;
776 }
777
778 /*
779 * Attempt to send a target reset message to the device that timed out.
780 */
781 static int
782 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
783 {
784 struct ahd_softc *ahd;
785 struct ahd_linux_device *dev;
786 struct scb *reset_scb;
787 u_int cdb_byte;
788 int retval = SUCCESS;
789 int paused;
790 int wait;
791 struct ahd_initiator_tinfo *tinfo;
792 struct ahd_tmode_tstate *tstate;
793 unsigned long flags;
794 DECLARE_COMPLETION_ONSTACK(done);
795
796 reset_scb = NULL;
797 paused = FALSE;
798 wait = FALSE;
799 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
800
801 scmd_printk(KERN_INFO, cmd,
802 "Attempting to queue a TARGET RESET message:");
803
804 printf("CDB:");
805 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
806 printf(" 0x%x", cmd->cmnd[cdb_byte]);
807 printf("\n");
808
809 /*
810 * Determine if we currently own this command.
811 */
812 dev = scsi_transport_device_data(cmd->device);
813
814 if (dev == NULL) {
815 /*
816 * No target device for this command exists,
817 * so we must not still own the command.
818 */
819 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
820 return SUCCESS;
821 }
822
823 /*
824 * Generate us a new SCB
825 */
826 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
827 if (!reset_scb) {
828 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
829 return FAILED;
830 }
831
832 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
833 cmd->device->id, &tstate);
834 reset_scb->io_ctx = cmd;
835 reset_scb->platform_data->dev = dev;
836 reset_scb->sg_count = 0;
837 ahd_set_residual(reset_scb, 0);
838 ahd_set_sense_residual(reset_scb, 0);
839 reset_scb->platform_data->xfer_len = 0;
840 reset_scb->hscb->control = 0;
841 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
842 reset_scb->hscb->lun = cmd->device->lun;
843 reset_scb->hscb->cdb_len = 0;
844 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
845 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
846 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
847 reset_scb->flags |= SCB_PACKETIZED;
848 } else {
849 reset_scb->hscb->control |= MK_MESSAGE;
850 }
851 dev->openings--;
852 dev->active++;
853 dev->commands_issued++;
854
855 ahd_lock(ahd, &flags);
856
857 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
858 ahd_queue_scb(ahd, reset_scb);
859
860 ahd->platform_data->eh_done = &done;
861 ahd_unlock(ahd, &flags);
862
863 printf("%s: Device reset code sleeping\n", ahd_name(ahd));
864 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
865 ahd_lock(ahd, &flags);
866 ahd->platform_data->eh_done = NULL;
867 ahd_unlock(ahd, &flags);
868 printf("%s: Device reset timer expired (active %d)\n",
869 ahd_name(ahd), dev->active);
870 retval = FAILED;
871 }
872 printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
873
874 return (retval);
875 }
876
877 /*
878 * Reset the SCSI bus.
879 */
880 static int
881 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
882 {
883 struct ahd_softc *ahd;
884 int found;
885 unsigned long flags;
886
887 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
888 #ifdef AHD_DEBUG
889 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
890 printf("%s: Bus reset called for cmd %p\n",
891 ahd_name(ahd), cmd);
892 #endif
893 ahd_lock(ahd, &flags);
894
895 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
896 /*initiate reset*/TRUE);
897 ahd_unlock(ahd, &flags);
898
899 if (bootverbose)
900 printf("%s: SCSI bus reset delivered. "
901 "%d SCBs aborted.\n", ahd_name(ahd), found);
902
903 return (SUCCESS);
904 }
905
906 struct scsi_host_template aic79xx_driver_template = {
907 .module = THIS_MODULE,
908 .name = "aic79xx",
909 .proc_name = "aic79xx",
910 .proc_info = ahd_linux_proc_info,
911 .info = ahd_linux_info,
912 .queuecommand = ahd_linux_queue,
913 .eh_abort_handler = ahd_linux_abort,
914 .eh_device_reset_handler = ahd_linux_dev_reset,
915 .eh_bus_reset_handler = ahd_linux_bus_reset,
916 #if defined(__i386__)
917 .bios_param = ahd_linux_biosparam,
918 #endif
919 .can_queue = AHD_MAX_QUEUE,
920 .this_id = -1,
921 .max_sectors = 8192,
922 .cmd_per_lun = 2,
923 .use_clustering = ENABLE_CLUSTERING,
924 .slave_alloc = ahd_linux_slave_alloc,
925 .slave_configure = ahd_linux_slave_configure,
926 .target_alloc = ahd_linux_target_alloc,
927 .target_destroy = ahd_linux_target_destroy,
928 };
929
930 /******************************** Bus DMA *************************************/
931 int
932 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
933 bus_size_t alignment, bus_size_t boundary,
934 dma_addr_t lowaddr, dma_addr_t highaddr,
935 bus_dma_filter_t *filter, void *filterarg,
936 bus_size_t maxsize, int nsegments,
937 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
938 {
939 bus_dma_tag_t dmat;
940
941 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
942 if (dmat == NULL)
943 return (ENOMEM);
944
945 /*
946 * Linux is very simplistic about DMA memory. For now don't
947 * maintain all specification information. Once Linux supplies
948 * better facilities for doing these operations, or the
949 * needs of this particular driver change, we might need to do
950 * more here.
951 */
952 dmat->alignment = alignment;
953 dmat->boundary = boundary;
954 dmat->maxsize = maxsize;
955 *ret_tag = dmat;
956 return (0);
957 }
958
959 void
960 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
961 {
962 free(dmat, M_DEVBUF);
963 }
964
965 int
966 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
967 int flags, bus_dmamap_t *mapp)
968 {
969 *vaddr = pci_alloc_consistent(ahd->dev_softc,
970 dmat->maxsize, mapp);
971 if (*vaddr == NULL)
972 return (ENOMEM);
973 return(0);
974 }
975
976 void
977 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
978 void* vaddr, bus_dmamap_t map)
979 {
980 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
981 vaddr, map);
982 }
983
984 int
985 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
986 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
987 void *cb_arg, int flags)
988 {
989 /*
990 * Assume for now that this will only be used during
991 * initialization and not for per-transaction buffer mapping.
992 */
993 bus_dma_segment_t stack_sg;
994
995 stack_sg.ds_addr = map;
996 stack_sg.ds_len = dmat->maxsize;
997 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
998 return (0);
999 }
1000
1001 void
1002 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1003 {
1004 }
1005
1006 int
1007 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1008 {
1009 /* Nothing to do */
1010 return (0);
1011 }
1012
1013 /********************* Platform Dependent Functions ***************************/
1014 static void
1015 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
1016 {
1017
1018 if ((instance >= 0)
1019 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
1020 uint8_t *iocell_info;
1021
1022 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1023 iocell_info[index] = value & 0xFFFF;
1024 if (bootverbose)
1025 printf("iocell[%d:%ld] = %d\n", instance, index, value);
1026 }
1027 }
1028
1029 static void
1030 ahd_linux_setup_tag_info_global(char *p)
1031 {
1032 int tags, i, j;
1033
1034 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1035 printf("Setting Global Tags= %d\n", tags);
1036
1037 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
1038 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1039 aic79xx_tag_info[i].tag_commands[j] = tags;
1040 }
1041 }
1042 }
1043
1044 static void
1045 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1046 {
1047
1048 if ((instance >= 0) && (targ >= 0)
1049 && (instance < ARRAY_SIZE(aic79xx_tag_info))
1050 && (targ < AHD_NUM_TARGETS)) {
1051 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1052 if (bootverbose)
1053 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
1054 }
1055 }
1056
1057 static char *
1058 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
1059 void (*callback)(u_long, int, int, int32_t),
1060 u_long callback_arg)
1061 {
1062 char *tok_end;
1063 char *tok_end2;
1064 int i;
1065 int instance;
1066 int targ;
1067 int done;
1068 char tok_list[] = {'.', ',', '{', '}', '\0'};
1069
1070 /* All options use a ':' name/arg separator */
1071 if (*opt_arg != ':')
1072 return (opt_arg);
1073 opt_arg++;
1074 instance = -1;
1075 targ = -1;
1076 done = FALSE;
1077 /*
1078 * Restore separator that may be in
1079 * the middle of our option argument.
1080 */
1081 tok_end = strchr(opt_arg, '\0');
1082 if (tok_end < end)
1083 *tok_end = ',';
1084 while (!done) {
1085 switch (*opt_arg) {
1086 case '{':
1087 if (instance == -1) {
1088 instance = 0;
1089 } else {
1090 if (depth > 1) {
1091 if (targ == -1)
1092 targ = 0;
1093 } else {
1094 printf("Malformed Option %s\n",
1095 opt_name);
1096 done = TRUE;
1097 }
1098 }
1099 opt_arg++;
1100 break;
1101 case '}':
1102 if (targ != -1)
1103 targ = -1;
1104 else if (instance != -1)
1105 instance = -1;
1106 opt_arg++;
1107 break;
1108 case ',':
1109 case '.':
1110 if (instance == -1)
1111 done = TRUE;
1112 else if (targ >= 0)
1113 targ++;
1114 else if (instance >= 0)
1115 instance++;
1116 opt_arg++;
1117 break;
1118 case '\0':
1119 done = TRUE;
1120 break;
1121 default:
1122 tok_end = end;
1123 for (i = 0; tok_list[i]; i++) {
1124 tok_end2 = strchr(opt_arg, tok_list[i]);
1125 if ((tok_end2) && (tok_end2 < tok_end))
1126 tok_end = tok_end2;
1127 }
1128 callback(callback_arg, instance, targ,
1129 simple_strtol(opt_arg, NULL, 0));
1130 opt_arg = tok_end;
1131 break;
1132 }
1133 }
1134 return (opt_arg);
1135 }
1136
1137 /*
1138 * Handle Linux boot parameters. This routine allows for assigning a value
1139 * to a parameter with a ':' between the parameter and the value.
1140 * ie. aic79xx=stpwlev:1,extended
1141 */
1142 static int
1143 aic79xx_setup(char *s)
1144 {
1145 int i, n;
1146 char *p;
1147 char *end;
1148
1149 static const struct {
1150 const char *name;
1151 uint32_t *flag;
1152 } options[] = {
1153 { "extended", &aic79xx_extended },
1154 { "no_reset", &aic79xx_no_reset },
1155 { "verbose", &aic79xx_verbose },
1156 { "allow_memio", &aic79xx_allow_memio},
1157 #ifdef AHD_DEBUG
1158 { "debug", &ahd_debug },
1159 #endif
1160 { "periodic_otag", &aic79xx_periodic_otag },
1161 { "pci_parity", &aic79xx_pci_parity },
1162 { "seltime", &aic79xx_seltime },
1163 { "tag_info", NULL },
1164 { "global_tag_depth", NULL},
1165 { "slewrate", NULL },
1166 { "precomp", NULL },
1167 { "amplitude", NULL },
1168 { "slowcrc", &aic79xx_slowcrc },
1169 };
1170
1171 end = strchr(s, '\0');
1172
1173 /*
1174 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1175 * will never be 0 in this case.
1176 */
1177 n = 0;
1178
1179 while ((p = strsep(&s, ",.")) != NULL) {
1180 if (*p == '\0')
1181 continue;
1182 for (i = 0; i < ARRAY_SIZE(options); i++) {
1183
1184 n = strlen(options[i].name);
1185 if (strncmp(options[i].name, p, n) == 0)
1186 break;
1187 }
1188 if (i == ARRAY_SIZE(options))
1189 continue;
1190
1191 if (strncmp(p, "global_tag_depth", n) == 0) {
1192 ahd_linux_setup_tag_info_global(p + n);
1193 } else if (strncmp(p, "tag_info", n) == 0) {
1194 s = ahd_parse_brace_option("tag_info", p + n, end,
1195 2, ahd_linux_setup_tag_info, 0);
1196 } else if (strncmp(p, "slewrate", n) == 0) {
1197 s = ahd_parse_brace_option("slewrate",
1198 p + n, end, 1, ahd_linux_setup_iocell_info,
1199 AIC79XX_SLEWRATE_INDEX);
1200 } else if (strncmp(p, "precomp", n) == 0) {
1201 s = ahd_parse_brace_option("precomp",
1202 p + n, end, 1, ahd_linux_setup_iocell_info,
1203 AIC79XX_PRECOMP_INDEX);
1204 } else if (strncmp(p, "amplitude", n) == 0) {
1205 s = ahd_parse_brace_option("amplitude",
1206 p + n, end, 1, ahd_linux_setup_iocell_info,
1207 AIC79XX_AMPLITUDE_INDEX);
1208 } else if (p[n] == ':') {
1209 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1210 } else if (!strncmp(p, "verbose", n)) {
1211 *(options[i].flag) = 1;
1212 } else {
1213 *(options[i].flag) ^= 0xFFFFFFFF;
1214 }
1215 }
1216 return 1;
1217 }
1218
1219 __setup("aic79xx=", aic79xx_setup);
1220
1221 uint32_t aic79xx_verbose;
1222
1223 int
1224 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1225 {
1226 char buf[80];
1227 struct Scsi_Host *host;
1228 char *new_name;
1229 u_long s;
1230 int retval;
1231
1232 template->name = ahd->description;
1233 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1234 if (host == NULL)
1235 return (ENOMEM);
1236
1237 *((struct ahd_softc **)host->hostdata) = ahd;
1238 ahd->platform_data->host = host;
1239 host->can_queue = AHD_MAX_QUEUE;
1240 host->cmd_per_lun = 2;
1241 host->sg_tablesize = AHD_NSEG;
1242 host->this_id = ahd->our_id;
1243 host->irq = ahd->platform_data->irq;
1244 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1245 host->max_lun = AHD_NUM_LUNS;
1246 host->max_channel = 0;
1247 host->sg_tablesize = AHD_NSEG;
1248 ahd_lock(ahd, &s);
1249 ahd_set_unit(ahd, ahd_linux_unit++);
1250 ahd_unlock(ahd, &s);
1251 sprintf(buf, "scsi%d", host->host_no);
1252 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1253 if (new_name != NULL) {
1254 strcpy(new_name, buf);
1255 ahd_set_name(ahd, new_name);
1256 }
1257 host->unique_id = ahd->unit;
1258 ahd_linux_initialize_scsi_bus(ahd);
1259 ahd_intr_enable(ahd, TRUE);
1260
1261 host->transportt = ahd_linux_transport_template;
1262
1263 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1264 if (retval) {
1265 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1266 scsi_host_put(host);
1267 return retval;
1268 }
1269
1270 scsi_scan_host(host);
1271 return 0;
1272 }
1273
1274 /*
1275 * Place the SCSI bus into a known state by either resetting it,
1276 * or forcing transfer negotiations on the next command to any
1277 * target.
1278 */
1279 static void
1280 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1281 {
1282 u_int target_id;
1283 u_int numtarg;
1284 unsigned long s;
1285
1286 target_id = 0;
1287 numtarg = 0;
1288
1289 if (aic79xx_no_reset != 0)
1290 ahd->flags &= ~AHD_RESET_BUS_A;
1291
1292 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1293 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1294 else
1295 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1296
1297 ahd_lock(ahd, &s);
1298
1299 /*
1300 * Force negotiation to async for all targets that
1301 * will not see an initial bus reset.
1302 */
1303 for (; target_id < numtarg; target_id++) {
1304 struct ahd_devinfo devinfo;
1305 struct ahd_initiator_tinfo *tinfo;
1306 struct ahd_tmode_tstate *tstate;
1307
1308 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1309 target_id, &tstate);
1310 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1311 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1312 ahd_update_neg_request(ahd, &devinfo, tstate,
1313 tinfo, AHD_NEG_ALWAYS);
1314 }
1315 ahd_unlock(ahd, &s);
1316 /* Give the bus some time to recover */
1317 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1318 ahd_freeze_simq(ahd);
1319 msleep(AIC79XX_RESET_DELAY);
1320 ahd_release_simq(ahd);
1321 }
1322 }
1323
1324 int
1325 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1326 {
1327 ahd->platform_data =
1328 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1329 if (ahd->platform_data == NULL)
1330 return (ENOMEM);
1331 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1332 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1333 ahd_lockinit(ahd);
1334 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1335 return (0);
1336 }
1337
1338 void
1339 ahd_platform_free(struct ahd_softc *ahd)
1340 {
1341 struct scsi_target *starget;
1342 int i;
1343
1344 if (ahd->platform_data != NULL) {
1345 /* destroy all of the device and target objects */
1346 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1347 starget = ahd->platform_data->starget[i];
1348 if (starget != NULL) {
1349 ahd->platform_data->starget[i] = NULL;
1350 }
1351 }
1352
1353 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1354 free_irq(ahd->platform_data->irq, ahd);
1355 if (ahd->tags[0] == BUS_SPACE_PIO
1356 && ahd->bshs[0].ioport != 0)
1357 release_region(ahd->bshs[0].ioport, 256);
1358 if (ahd->tags[1] == BUS_SPACE_PIO
1359 && ahd->bshs[1].ioport != 0)
1360 release_region(ahd->bshs[1].ioport, 256);
1361 if (ahd->tags[0] == BUS_SPACE_MEMIO
1362 && ahd->bshs[0].maddr != NULL) {
1363 iounmap(ahd->bshs[0].maddr);
1364 release_mem_region(ahd->platform_data->mem_busaddr,
1365 0x1000);
1366 }
1367 if (ahd->platform_data->host)
1368 scsi_host_put(ahd->platform_data->host);
1369
1370 free(ahd->platform_data, M_DEVBUF);
1371 }
1372 }
1373
1374 void
1375 ahd_platform_init(struct ahd_softc *ahd)
1376 {
1377 /*
1378 * Lookup and commit any modified IO Cell options.
1379 */
1380 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1381 const struct ahd_linux_iocell_opts *iocell_opts;
1382
1383 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1384 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1385 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1386 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1387 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1388 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1389 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1390 }
1391
1392 }
1393
1394 void
1395 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1396 {
1397 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1398 SCB_GET_CHANNEL(ahd, scb),
1399 SCB_GET_LUN(scb), SCB_LIST_NULL,
1400 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1401 }
1402
1403 void
1404 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1405 struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1406 {
1407 struct ahd_linux_device *dev;
1408 int was_queuing;
1409 int now_queuing;
1410
1411 if (sdev == NULL)
1412 return;
1413
1414 dev = scsi_transport_device_data(sdev);
1415
1416 if (dev == NULL)
1417 return;
1418 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1419 switch (alg) {
1420 default:
1421 case AHD_QUEUE_NONE:
1422 now_queuing = 0;
1423 break;
1424 case AHD_QUEUE_BASIC:
1425 now_queuing = AHD_DEV_Q_BASIC;
1426 break;
1427 case AHD_QUEUE_TAGGED:
1428 now_queuing = AHD_DEV_Q_TAGGED;
1429 break;
1430 }
1431 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1432 && (was_queuing != now_queuing)
1433 && (dev->active != 0)) {
1434 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1435 dev->qfrozen++;
1436 }
1437
1438 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1439 if (now_queuing) {
1440 u_int usertags;
1441
1442 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1443 if (!was_queuing) {
1444 /*
1445 * Start out agressively and allow our
1446 * dynamic queue depth algorithm to take
1447 * care of the rest.
1448 */
1449 dev->maxtags = usertags;
1450 dev->openings = dev->maxtags - dev->active;
1451 }
1452 if (dev->maxtags == 0) {
1453 /*
1454 * Queueing is disabled by the user.
1455 */
1456 dev->openings = 1;
1457 } else if (alg == AHD_QUEUE_TAGGED) {
1458 dev->flags |= AHD_DEV_Q_TAGGED;
1459 if (aic79xx_periodic_otag != 0)
1460 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1461 } else
1462 dev->flags |= AHD_DEV_Q_BASIC;
1463 } else {
1464 /* We can only have one opening. */
1465 dev->maxtags = 0;
1466 dev->openings = 1 - dev->active;
1467 }
1468
1469 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1470 case AHD_DEV_Q_BASIC:
1471 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1472 scsi_activate_tcq(sdev, dev->openings + dev->active);
1473 break;
1474 case AHD_DEV_Q_TAGGED:
1475 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1476 scsi_activate_tcq(sdev, dev->openings + dev->active);
1477 break;
1478 default:
1479 /*
1480 * We allow the OS to queue 2 untagged transactions to
1481 * us at any time even though we can only execute them
1482 * serially on the controller/device. This should
1483 * remove some latency.
1484 */
1485 scsi_deactivate_tcq(sdev, 1);
1486 break;
1487 }
1488 }
1489
1490 int
1491 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1492 int lun, u_int tag, role_t role, uint32_t status)
1493 {
1494 return 0;
1495 }
1496
1497 static u_int
1498 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1499 {
1500 static int warned_user;
1501 u_int tags;
1502
1503 tags = 0;
1504 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1505 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1506
1507 if (warned_user == 0) {
1508 printf(KERN_WARNING
1509 "aic79xx: WARNING: Insufficient tag_info instances\n"
1510 "aic79xx: for installed controllers. Using defaults\n"
1511 "aic79xx: Please update the aic79xx_tag_info array in\n"
1512 "aic79xx: the aic79xx_osm.c source file.\n");
1513 warned_user++;
1514 }
1515 tags = AHD_MAX_QUEUE;
1516 } else {
1517 adapter_tag_info_t *tag_info;
1518
1519 tag_info = &aic79xx_tag_info[ahd->unit];
1520 tags = tag_info->tag_commands[devinfo->target_offset];
1521 if (tags > AHD_MAX_QUEUE)
1522 tags = AHD_MAX_QUEUE;
1523 }
1524 }
1525 return (tags);
1526 }
1527
1528 /*
1529 * Determines the queue depth for a given device.
1530 */
1531 static void
1532 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1533 {
1534 struct ahd_devinfo devinfo;
1535 u_int tags;
1536 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1537
1538 ahd_compile_devinfo(&devinfo,
1539 ahd->our_id,
1540 sdev->sdev_target->id, sdev->lun,
1541 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1542 ROLE_INITIATOR);
1543 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1544 if (tags != 0 && sdev->tagged_supported != 0) {
1545
1546 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1547 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1548 devinfo.lun, AC_TRANSFER_NEG);
1549 ahd_print_devinfo(ahd, &devinfo);
1550 printf("Tagged Queuing enabled. Depth %d\n", tags);
1551 } else {
1552 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1553 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1554 devinfo.lun, AC_TRANSFER_NEG);
1555 }
1556 }
1557
1558 static int
1559 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1560 struct scsi_cmnd *cmd)
1561 {
1562 struct scb *scb;
1563 struct hardware_scb *hscb;
1564 struct ahd_initiator_tinfo *tinfo;
1565 struct ahd_tmode_tstate *tstate;
1566 u_int col_idx;
1567 uint16_t mask;
1568 unsigned long flags;
1569 int nseg;
1570
1571 nseg = scsi_dma_map(cmd);
1572 if (nseg < 0)
1573 return SCSI_MLQUEUE_HOST_BUSY;
1574
1575 ahd_lock(ahd, &flags);
1576
1577 /*
1578 * Get an scb to use.
1579 */
1580 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1581 cmd->device->id, &tstate);
1582 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1583 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1584 col_idx = AHD_NEVER_COL_IDX;
1585 } else {
1586 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1587 cmd->device->lun);
1588 }
1589 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1590 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1591 ahd_unlock(ahd, &flags);
1592 scsi_dma_unmap(cmd);
1593 return SCSI_MLQUEUE_HOST_BUSY;
1594 }
1595
1596 scb->io_ctx = cmd;
1597 scb->platform_data->dev = dev;
1598 hscb = scb->hscb;
1599 cmd->host_scribble = (char *)scb;
1600
1601 /*
1602 * Fill out basics of the HSCB.
1603 */
1604 hscb->control = 0;
1605 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1606 hscb->lun = cmd->device->lun;
1607 scb->hscb->task_management = 0;
1608 mask = SCB_GET_TARGET_MASK(ahd, scb);
1609
1610 if ((ahd->user_discenable & mask) != 0)
1611 hscb->control |= DISCENB;
1612
1613 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1614 scb->flags |= SCB_PACKETIZED;
1615
1616 if ((tstate->auto_negotiate & mask) != 0) {
1617 scb->flags |= SCB_AUTO_NEGOTIATE;
1618 scb->hscb->control |= MK_MESSAGE;
1619 }
1620
1621 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1622 int msg_bytes;
1623 uint8_t tag_msgs[2];
1624
1625 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1626 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1627 hscb->control |= tag_msgs[0];
1628 if (tag_msgs[0] == MSG_ORDERED_TASK)
1629 dev->commands_since_idle_or_otag = 0;
1630 } else
1631 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1632 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1633 hscb->control |= MSG_ORDERED_TASK;
1634 dev->commands_since_idle_or_otag = 0;
1635 } else {
1636 hscb->control |= MSG_SIMPLE_TASK;
1637 }
1638 }
1639
1640 hscb->cdb_len = cmd->cmd_len;
1641 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1642
1643 scb->platform_data->xfer_len = 0;
1644 ahd_set_residual(scb, 0);
1645 ahd_set_sense_residual(scb, 0);
1646 scb->sg_count = 0;
1647
1648 if (nseg > 0) {
1649 void *sg = scb->sg_list;
1650 struct scatterlist *cur_seg;
1651 int i;
1652
1653 scb->platform_data->xfer_len = 0;
1654
1655 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1656 dma_addr_t addr;
1657 bus_size_t len;
1658
1659 addr = sg_dma_address(cur_seg);
1660 len = sg_dma_len(cur_seg);
1661 scb->platform_data->xfer_len += len;
1662 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1663 i == (nseg - 1));
1664 }
1665 }
1666
1667 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1668 dev->openings--;
1669 dev->active++;
1670 dev->commands_issued++;
1671
1672 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1673 dev->commands_since_idle_or_otag++;
1674 scb->flags |= SCB_ACTIVE;
1675 ahd_queue_scb(ahd, scb);
1676
1677 ahd_unlock(ahd, &flags);
1678
1679 return 0;
1680 }
1681
1682 /*
1683 * SCSI controller interrupt handler.
1684 */
1685 irqreturn_t
1686 ahd_linux_isr(int irq, void *dev_id)
1687 {
1688 struct ahd_softc *ahd;
1689 u_long flags;
1690 int ours;
1691
1692 ahd = (struct ahd_softc *) dev_id;
1693 ahd_lock(ahd, &flags);
1694 ours = ahd_intr(ahd);
1695 ahd_unlock(ahd, &flags);
1696 return IRQ_RETVAL(ours);
1697 }
1698
1699 void
1700 ahd_send_async(struct ahd_softc *ahd, char channel,
1701 u_int target, u_int lun, ac_code code)
1702 {
1703 switch (code) {
1704 case AC_TRANSFER_NEG:
1705 {
1706 char buf[80];
1707 struct scsi_target *starget;
1708 struct info_str info;
1709 struct ahd_initiator_tinfo *tinfo;
1710 struct ahd_tmode_tstate *tstate;
1711 unsigned int target_ppr_options;
1712
1713 BUG_ON(target == CAM_TARGET_WILDCARD);
1714
1715 info.buffer = buf;
1716 info.length = sizeof(buf);
1717 info.offset = 0;
1718 info.pos = 0;
1719 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1720 target, &tstate);
1721
1722 /*
1723 * Don't bother reporting results while
1724 * negotiations are still pending.
1725 */
1726 if (tinfo->curr.period != tinfo->goal.period
1727 || tinfo->curr.width != tinfo->goal.width
1728 || tinfo->curr.offset != tinfo->goal.offset
1729 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1730 if (bootverbose == 0)
1731 break;
1732
1733 /*
1734 * Don't bother reporting results that
1735 * are identical to those last reported.
1736 */
1737 starget = ahd->platform_data->starget[target];
1738 if (starget == NULL)
1739 break;
1740
1741 target_ppr_options =
1742 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1743 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1744 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1745 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1746 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1747 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1748 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1749 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1750
1751 if (tinfo->curr.period == spi_period(starget)
1752 && tinfo->curr.width == spi_width(starget)
1753 && tinfo->curr.offset == spi_offset(starget)
1754 && tinfo->curr.ppr_options == target_ppr_options)
1755 if (bootverbose == 0)
1756 break;
1757
1758 spi_period(starget) = tinfo->curr.period;
1759 spi_width(starget) = tinfo->curr.width;
1760 spi_offset(starget) = tinfo->curr.offset;
1761 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1762 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1763 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1764 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1765 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1766 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1767 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1768 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1769 spi_display_xfer_agreement(starget);
1770 break;
1771 }
1772 case AC_SENT_BDR:
1773 {
1774 WARN_ON(lun != CAM_LUN_WILDCARD);
1775 scsi_report_device_reset(ahd->platform_data->host,
1776 channel - 'A', target);
1777 break;
1778 }
1779 case AC_BUS_RESET:
1780 if (ahd->platform_data->host != NULL) {
1781 scsi_report_bus_reset(ahd->platform_data->host,
1782 channel - 'A');
1783 }
1784 break;
1785 default:
1786 panic("ahd_send_async: Unexpected async event");
1787 }
1788 }
1789
1790 /*
1791 * Calls the higher level scsi done function and frees the scb.
1792 */
1793 void
1794 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1795 {
1796 struct scsi_cmnd *cmd;
1797 struct ahd_linux_device *dev;
1798
1799 if ((scb->flags & SCB_ACTIVE) == 0) {
1800 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1801 ahd_dump_card_state(ahd);
1802 panic("Stopping for safety");
1803 }
1804 LIST_REMOVE(scb, pending_links);
1805 cmd = scb->io_ctx;
1806 dev = scb->platform_data->dev;
1807 dev->active--;
1808 dev->openings++;
1809 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1810 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1811 dev->qfrozen--;
1812 }
1813 ahd_linux_unmap_scb(ahd, scb);
1814
1815 /*
1816 * Guard against stale sense data.
1817 * The Linux mid-layer assumes that sense
1818 * was retrieved anytime the first byte of
1819 * the sense buffer looks "sane".
1820 */
1821 cmd->sense_buffer[0] = 0;
1822 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1823 uint32_t amount_xferred;
1824
1825 amount_xferred =
1826 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1827 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1828 #ifdef AHD_DEBUG
1829 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1830 ahd_print_path(ahd, scb);
1831 printf("Set CAM_UNCOR_PARITY\n");
1832 }
1833 #endif
1834 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1835 #ifdef AHD_REPORT_UNDERFLOWS
1836 /*
1837 * This code is disabled by default as some
1838 * clients of the SCSI system do not properly
1839 * initialize the underflow parameter. This
1840 * results in spurious termination of commands
1841 * that complete as expected (e.g. underflow is
1842 * allowed as command can return variable amounts
1843 * of data.
1844 */
1845 } else if (amount_xferred < scb->io_ctx->underflow) {
1846 u_int i;
1847
1848 ahd_print_path(ahd, scb);
1849 printf("CDB:");
1850 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1851 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1852 printf("\n");
1853 ahd_print_path(ahd, scb);
1854 printf("Saw underflow (%ld of %ld bytes). "
1855 "Treated as error\n",
1856 ahd_get_residual(scb),
1857 ahd_get_transfer_length(scb));
1858 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1859 #endif
1860 } else {
1861 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1862 }
1863 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1864 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1865 }
1866
1867 if (dev->openings == 1
1868 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1869 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1870 dev->tag_success_count++;
1871 /*
1872 * Some devices deal with temporary internal resource
1873 * shortages by returning queue full. When the queue
1874 * full occurrs, we throttle back. Slowly try to get
1875 * back to our previous queue depth.
1876 */
1877 if ((dev->openings + dev->active) < dev->maxtags
1878 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1879 dev->tag_success_count = 0;
1880 dev->openings++;
1881 }
1882
1883 if (dev->active == 0)
1884 dev->commands_since_idle_or_otag = 0;
1885
1886 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1887 printf("Recovery SCB completes\n");
1888 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1889 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1890 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1891
1892 if (ahd->platform_data->eh_done)
1893 complete(ahd->platform_data->eh_done);
1894 }
1895
1896 ahd_free_scb(ahd, scb);
1897 ahd_linux_queue_cmd_complete(ahd, cmd);
1898 }
1899
1900 static void
1901 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1902 struct scsi_device *sdev, struct scb *scb)
1903 {
1904 struct ahd_devinfo devinfo;
1905 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1906
1907 ahd_compile_devinfo(&devinfo,
1908 ahd->our_id,
1909 sdev->sdev_target->id, sdev->lun,
1910 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1911 ROLE_INITIATOR);
1912
1913 /*
1914 * We don't currently trust the mid-layer to
1915 * properly deal with queue full or busy. So,
1916 * when one occurs, we tell the mid-layer to
1917 * unconditionally requeue the command to us
1918 * so that we can retry it ourselves. We also
1919 * implement our own throttling mechanism so
1920 * we don't clobber the device with too many
1921 * commands.
1922 */
1923 switch (ahd_get_scsi_status(scb)) {
1924 default:
1925 break;
1926 case SCSI_STATUS_CHECK_COND:
1927 case SCSI_STATUS_CMD_TERMINATED:
1928 {
1929 struct scsi_cmnd *cmd;
1930
1931 /*
1932 * Copy sense information to the OS's cmd
1933 * structure if it is available.
1934 */
1935 cmd = scb->io_ctx;
1936 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1937 struct scsi_status_iu_header *siu;
1938 u_int sense_size;
1939 u_int sense_offset;
1940
1941 if (scb->flags & SCB_SENSE) {
1942 sense_size = min(sizeof(struct scsi_sense_data)
1943 - ahd_get_sense_residual(scb),
1944 (u_long)SCSI_SENSE_BUFFERSIZE);
1945 sense_offset = 0;
1946 } else {
1947 /*
1948 * Copy only the sense data into the provided
1949 * buffer.
1950 */
1951 siu = (struct scsi_status_iu_header *)
1952 scb->sense_data;
1953 sense_size = min_t(size_t,
1954 scsi_4btoul(siu->sense_length),
1955 SCSI_SENSE_BUFFERSIZE);
1956 sense_offset = SIU_SENSE_OFFSET(siu);
1957 }
1958
1959 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1960 memcpy(cmd->sense_buffer,
1961 ahd_get_sense_buf(ahd, scb)
1962 + sense_offset, sense_size);
1963 cmd->result |= (DRIVER_SENSE << 24);
1964
1965 #ifdef AHD_DEBUG
1966 if (ahd_debug & AHD_SHOW_SENSE) {
1967 int i;
1968
1969 printf("Copied %d bytes of sense data at %d:",
1970 sense_size, sense_offset);
1971 for (i = 0; i < sense_size; i++) {
1972 if ((i & 0xF) == 0)
1973 printf("\n");
1974 printf("0x%x ", cmd->sense_buffer[i]);
1975 }
1976 printf("\n");
1977 }
1978 #endif
1979 }
1980 break;
1981 }
1982 case SCSI_STATUS_QUEUE_FULL:
1983 /*
1984 * By the time the core driver has returned this
1985 * command, all other commands that were queued
1986 * to us but not the device have been returned.
1987 * This ensures that dev->active is equal to
1988 * the number of commands actually queued to
1989 * the device.
1990 */
1991 dev->tag_success_count = 0;
1992 if (dev->active != 0) {
1993 /*
1994 * Drop our opening count to the number
1995 * of commands currently outstanding.
1996 */
1997 dev->openings = 0;
1998 #ifdef AHD_DEBUG
1999 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
2000 ahd_print_path(ahd, scb);
2001 printf("Dropping tag count to %d\n",
2002 dev->active);
2003 }
2004 #endif
2005 if (dev->active == dev->tags_on_last_queuefull) {
2006
2007 dev->last_queuefull_same_count++;
2008 /*
2009 * If we repeatedly see a queue full
2010 * at the same queue depth, this
2011 * device has a fixed number of tag
2012 * slots. Lock in this tag depth
2013 * so we stop seeing queue fulls from
2014 * this device.
2015 */
2016 if (dev->last_queuefull_same_count
2017 == AHD_LOCK_TAGS_COUNT) {
2018 dev->maxtags = dev->active;
2019 ahd_print_path(ahd, scb);
2020 printf("Locking max tag count at %d\n",
2021 dev->active);
2022 }
2023 } else {
2024 dev->tags_on_last_queuefull = dev->active;
2025 dev->last_queuefull_same_count = 0;
2026 }
2027 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
2028 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
2029 ahd_platform_set_tags(ahd, sdev, &devinfo,
2030 (dev->flags & AHD_DEV_Q_BASIC)
2031 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2032 break;
2033 }
2034 /*
2035 * Drop down to a single opening, and treat this
2036 * as if the target returned BUSY SCSI status.
2037 */
2038 dev->openings = 1;
2039 ahd_platform_set_tags(ahd, sdev, &devinfo,
2040 (dev->flags & AHD_DEV_Q_BASIC)
2041 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2042 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
2043 }
2044 }
2045
2046 static void
2047 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
2048 {
2049 int status;
2050 int new_status = DID_OK;
2051 int do_fallback = 0;
2052 int scsi_status;
2053
2054 /*
2055 * Map CAM error codes into Linux Error codes. We
2056 * avoid the conversion so that the DV code has the
2057 * full error information available when making
2058 * state change decisions.
2059 */
2060
2061 status = ahd_cmd_get_transaction_status(cmd);
2062 switch (status) {
2063 case CAM_REQ_INPROG:
2064 case CAM_REQ_CMP:
2065 new_status = DID_OK;
2066 break;
2067 case CAM_AUTOSENSE_FAIL:
2068 new_status = DID_ERROR;
2069 /* Fallthrough */
2070 case CAM_SCSI_STATUS_ERROR:
2071 scsi_status = ahd_cmd_get_scsi_status(cmd);
2072
2073 switch(scsi_status) {
2074 case SCSI_STATUS_CMD_TERMINATED:
2075 case SCSI_STATUS_CHECK_COND:
2076 if ((cmd->result >> 24) != DRIVER_SENSE) {
2077 do_fallback = 1;
2078 } else {
2079 struct scsi_sense_data *sense;
2080
2081 sense = (struct scsi_sense_data *)
2082 cmd->sense_buffer;
2083 if (sense->extra_len >= 5 &&
2084 (sense->add_sense_code == 0x47
2085 || sense->add_sense_code == 0x48))
2086 do_fallback = 1;
2087 }
2088 break;
2089 default:
2090 break;
2091 }
2092 break;
2093 case CAM_REQ_ABORTED:
2094 new_status = DID_ABORT;
2095 break;
2096 case CAM_BUSY:
2097 new_status = DID_BUS_BUSY;
2098 break;
2099 case CAM_REQ_INVALID:
2100 case CAM_PATH_INVALID:
2101 new_status = DID_BAD_TARGET;
2102 break;
2103 case CAM_SEL_TIMEOUT:
2104 new_status = DID_NO_CONNECT;
2105 break;
2106 case CAM_SCSI_BUS_RESET:
2107 case CAM_BDR_SENT:
2108 new_status = DID_RESET;
2109 break;
2110 case CAM_UNCOR_PARITY:
2111 new_status = DID_PARITY;
2112 do_fallback = 1;
2113 break;
2114 case CAM_CMD_TIMEOUT:
2115 new_status = DID_TIME_OUT;
2116 do_fallback = 1;
2117 break;
2118 case CAM_REQ_CMP_ERR:
2119 case CAM_UNEXP_BUSFREE:
2120 case CAM_DATA_RUN_ERR:
2121 new_status = DID_ERROR;
2122 do_fallback = 1;
2123 break;
2124 case CAM_UA_ABORT:
2125 case CAM_NO_HBA:
2126 case CAM_SEQUENCE_FAIL:
2127 case CAM_CCB_LEN_ERR:
2128 case CAM_PROVIDE_FAIL:
2129 case CAM_REQ_TERMIO:
2130 case CAM_UNREC_HBA_ERROR:
2131 case CAM_REQ_TOO_BIG:
2132 new_status = DID_ERROR;
2133 break;
2134 case CAM_REQUEUE_REQ:
2135 new_status = DID_REQUEUE;
2136 break;
2137 default:
2138 /* We should never get here */
2139 new_status = DID_ERROR;
2140 break;
2141 }
2142
2143 if (do_fallback) {
2144 printf("%s: device overrun (status %x) on %d:%d:%d\n",
2145 ahd_name(ahd), status, cmd->device->channel,
2146 cmd->device->id, cmd->device->lun);
2147 }
2148
2149 ahd_cmd_set_transaction_status(cmd, new_status);
2150
2151 cmd->scsi_done(cmd);
2152 }
2153
2154 static void
2155 ahd_freeze_simq(struct ahd_softc *ahd)
2156 {
2157 scsi_block_requests(ahd->platform_data->host);
2158 }
2159
2160 static void
2161 ahd_release_simq(struct ahd_softc *ahd)
2162 {
2163 scsi_unblock_requests(ahd->platform_data->host);
2164 }
2165
2166 static int
2167 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2168 {
2169 struct ahd_softc *ahd;
2170 struct ahd_linux_device *dev;
2171 struct scb *pending_scb;
2172 u_int saved_scbptr;
2173 u_int active_scbptr;
2174 u_int last_phase;
2175 u_int saved_scsiid;
2176 u_int cdb_byte;
2177 int retval;
2178 int was_paused;
2179 int paused;
2180 int wait;
2181 int disconnected;
2182 ahd_mode_state saved_modes;
2183 unsigned long flags;
2184
2185 pending_scb = NULL;
2186 paused = FALSE;
2187 wait = FALSE;
2188 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2189
2190 scmd_printk(KERN_INFO, cmd,
2191 "Attempting to queue an ABORT message:");
2192
2193 printf("CDB:");
2194 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2195 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2196 printf("\n");
2197
2198 ahd_lock(ahd, &flags);
2199
2200 /*
2201 * First determine if we currently own this command.
2202 * Start by searching the device queue. If not found
2203 * there, check the pending_scb list. If not found
2204 * at all, and the system wanted us to just abort the
2205 * command, return success.
2206 */
2207 dev = scsi_transport_device_data(cmd->device);
2208
2209 if (dev == NULL) {
2210 /*
2211 * No target device for this command exists,
2212 * so we must not still own the command.
2213 */
2214 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2215 retval = SUCCESS;
2216 goto no_cmd;
2217 }
2218
2219 /*
2220 * See if we can find a matching cmd in the pending list.
2221 */
2222 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2223 if (pending_scb->io_ctx == cmd)
2224 break;
2225 }
2226
2227 if (pending_scb == NULL) {
2228 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2229 goto no_cmd;
2230 }
2231
2232 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2233 /*
2234 * We can't queue two recovery actions using the same SCB
2235 */
2236 retval = FAILED;
2237 goto done;
2238 }
2239
2240 /*
2241 * Ensure that the card doesn't do anything
2242 * behind our back. Also make sure that we
2243 * didn't "just" miss an interrupt that would
2244 * affect this cmd.
2245 */
2246 was_paused = ahd_is_paused(ahd);
2247 ahd_pause_and_flushwork(ahd);
2248 paused = TRUE;
2249
2250 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2251 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2252 goto no_cmd;
2253 }
2254
2255 printf("%s: At time of recovery, card was %spaused\n",
2256 ahd_name(ahd), was_paused ? "" : "not ");
2257 ahd_dump_card_state(ahd);
2258
2259 disconnected = TRUE;
2260 if (ahd_search_qinfifo(ahd, cmd->device->id,
2261 cmd->device->channel + 'A',
2262 cmd->device->lun,
2263 pending_scb->hscb->tag,
2264 ROLE_INITIATOR, CAM_REQ_ABORTED,
2265 SEARCH_COMPLETE) > 0) {
2266 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2267 ahd_name(ahd), cmd->device->channel,
2268 cmd->device->id, cmd->device->lun);
2269 retval = SUCCESS;
2270 goto done;
2271 }
2272
2273 saved_modes = ahd_save_modes(ahd);
2274 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2275 last_phase = ahd_inb(ahd, LASTPHASE);
2276 saved_scbptr = ahd_get_scbptr(ahd);
2277 active_scbptr = saved_scbptr;
2278 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2279 struct scb *bus_scb;
2280
2281 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2282 if (bus_scb == pending_scb)
2283 disconnected = FALSE;
2284 }
2285
2286 /*
2287 * At this point, pending_scb is the scb associated with the
2288 * passed in command. That command is currently active on the
2289 * bus or is in the disconnected state.
2290 */
2291 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2292 if (last_phase != P_BUSFREE
2293 && SCB_GET_TAG(pending_scb) == active_scbptr) {
2294
2295 /*
2296 * We're active on the bus, so assert ATN
2297 * and hope that the target responds.
2298 */
2299 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2300 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2301 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2302 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2303 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2304 wait = TRUE;
2305 } else if (disconnected) {
2306
2307 /*
2308 * Actually re-queue this SCB in an attempt
2309 * to select the device before it reconnects.
2310 */
2311 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2312 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2313 pending_scb->hscb->cdb_len = 0;
2314 pending_scb->hscb->task_attribute = 0;
2315 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2316
2317 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2318 /*
2319 * Mark the SCB has having an outstanding
2320 * task management function. Should the command
2321 * complete normally before the task management
2322 * function can be sent, the host will be notified
2323 * to abort our requeued SCB.
2324 */
2325 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2326 pending_scb->hscb->task_management);
2327 } else {
2328 /*
2329 * If non-packetized, set the MK_MESSAGE control
2330 * bit indicating that we desire to send a message.
2331 * We also set the disconnected flag since there is
2332 * no guarantee that our SCB control byte matches
2333 * the version on the card. We don't want the
2334 * sequencer to abort the command thinking an
2335 * unsolicited reselection occurred.
2336 */
2337 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2338
2339 /*
2340 * The sequencer will never re-reference the
2341 * in-core SCB. To make sure we are notified
2342 * during reslection, set the MK_MESSAGE flag in
2343 * the card's copy of the SCB.
2344 */
2345 ahd_outb(ahd, SCB_CONTROL,
2346 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2347 }
2348
2349 /*
2350 * Clear out any entries in the QINFIFO first
2351 * so we are the next SCB for this target
2352 * to run.
2353 */
2354 ahd_search_qinfifo(ahd, cmd->device->id,
2355 cmd->device->channel + 'A', cmd->device->lun,
2356 SCB_LIST_NULL, ROLE_INITIATOR,
2357 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2358 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2359 ahd_set_scbptr(ahd, saved_scbptr);
2360 ahd_print_path(ahd, pending_scb);
2361 printf("Device is disconnected, re-queuing SCB\n");
2362 wait = TRUE;
2363 } else {
2364 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2365 retval = FAILED;
2366 goto done;
2367 }
2368
2369 no_cmd:
2370 /*
2371 * Our assumption is that if we don't have the command, no
2372 * recovery action was required, so we return success. Again,
2373 * the semantics of the mid-layer recovery engine are not
2374 * well defined, so this may change in time.
2375 */
2376 retval = SUCCESS;
2377 done:
2378 if (paused)
2379 ahd_unpause(ahd);
2380 if (wait) {
2381 DECLARE_COMPLETION_ONSTACK(done);
2382
2383 ahd->platform_data->eh_done = &done;
2384 ahd_unlock(ahd, &flags);
2385
2386 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
2387 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2388 ahd_lock(ahd, &flags);
2389 ahd->platform_data->eh_done = NULL;
2390 ahd_unlock(ahd, &flags);
2391 printf("%s: Timer Expired (active %d)\n",
2392 ahd_name(ahd), dev->active);
2393 retval = FAILED;
2394 }
2395 printf("Recovery code awake\n");
2396 } else
2397 ahd_unlock(ahd, &flags);
2398
2399 if (retval != SUCCESS)
2400 printf("%s: Command abort returning 0x%x\n",
2401 ahd_name(ahd), retval);
2402
2403 return retval;
2404 }
2405
2406 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2407 {
2408 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2409 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2410 struct ahd_devinfo devinfo;
2411 unsigned long flags;
2412
2413 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2414 starget->channel + 'A', ROLE_INITIATOR);
2415 ahd_lock(ahd, &flags);
2416 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2417 ahd_unlock(ahd, &flags);
2418 }
2419
2420 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2421 {
2422 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2423 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2424 struct ahd_tmode_tstate *tstate;
2425 struct ahd_initiator_tinfo *tinfo
2426 = ahd_fetch_transinfo(ahd,
2427 starget->channel + 'A',
2428 shost->this_id, starget->id, &tstate);
2429 struct ahd_devinfo devinfo;
2430 unsigned int ppr_options = tinfo->goal.ppr_options;
2431 unsigned int dt;
2432 unsigned long flags;
2433 unsigned long offset = tinfo->goal.offset;
2434
2435 #ifdef AHD_DEBUG
2436 if ((ahd_debug & AHD_SHOW_DV) != 0)
2437 printf("%s: set period to %d\n", ahd_name(ahd), period);
2438 #endif
2439 if (offset == 0)
2440 offset = MAX_OFFSET;
2441
2442 if (period < 8)
2443 period = 8;
2444 if (period < 10) {
2445 if (spi_max_width(starget)) {
2446 ppr_options |= MSG_EXT_PPR_DT_REQ;
2447 if (period == 8)
2448 ppr_options |= MSG_EXT_PPR_IU_REQ;
2449 } else
2450 period = 10;
2451 }
2452
2453 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2454
2455 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2456 starget->channel + 'A', ROLE_INITIATOR);
2457
2458 /* all PPR requests apart from QAS require wide transfers */
2459 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2460 if (spi_width(starget) == 0)
2461 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2462 }
2463
2464 ahd_find_syncrate(ahd, &period, &ppr_options,
2465 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2466
2467 ahd_lock(ahd, &flags);
2468 ahd_set_syncrate(ahd, &devinfo, period, offset,
2469 ppr_options, AHD_TRANS_GOAL, FALSE);
2470 ahd_unlock(ahd, &flags);
2471 }
2472
2473 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2474 {
2475 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2476 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2477 struct ahd_tmode_tstate *tstate;
2478 struct ahd_initiator_tinfo *tinfo
2479 = ahd_fetch_transinfo(ahd,
2480 starget->channel + 'A',
2481 shost->this_id, starget->id, &tstate);
2482 struct ahd_devinfo devinfo;
2483 unsigned int ppr_options = 0;
2484 unsigned int period = 0;
2485 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2486 unsigned long flags;
2487
2488 #ifdef AHD_DEBUG
2489 if ((ahd_debug & AHD_SHOW_DV) != 0)
2490 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2491 #endif
2492
2493 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2494 starget->channel + 'A', ROLE_INITIATOR);
2495 if (offset != 0) {
2496 period = tinfo->goal.period;
2497 ppr_options = tinfo->goal.ppr_options;
2498 ahd_find_syncrate(ahd, &period, &ppr_options,
2499 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2500 }
2501
2502 ahd_lock(ahd, &flags);
2503 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2504 AHD_TRANS_GOAL, FALSE);
2505 ahd_unlock(ahd, &flags);
2506 }
2507
2508 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2509 {
2510 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2511 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2512 struct ahd_tmode_tstate *tstate;
2513 struct ahd_initiator_tinfo *tinfo
2514 = ahd_fetch_transinfo(ahd,
2515 starget->channel + 'A',
2516 shost->this_id, starget->id, &tstate);
2517 struct ahd_devinfo devinfo;
2518 unsigned int ppr_options = tinfo->goal.ppr_options
2519 & ~MSG_EXT_PPR_DT_REQ;
2520 unsigned int period = tinfo->goal.period;
2521 unsigned int width = tinfo->goal.width;
2522 unsigned long flags;
2523
2524 #ifdef AHD_DEBUG
2525 if ((ahd_debug & AHD_SHOW_DV) != 0)
2526 printf("%s: %s DT\n", ahd_name(ahd),
2527 dt ? "enabling" : "disabling");
2528 #endif
2529 if (dt && spi_max_width(starget)) {
2530 ppr_options |= MSG_EXT_PPR_DT_REQ;
2531 if (!width)
2532 ahd_linux_set_width(starget, 1);
2533 } else {
2534 if (period <= 9)
2535 period = 10; /* If resetting DT, period must be >= 25ns */
2536 /* IU is invalid without DT set */
2537 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2538 }
2539 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2540 starget->channel + 'A', ROLE_INITIATOR);
2541 ahd_find_syncrate(ahd, &period, &ppr_options,
2542 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2543
2544 ahd_lock(ahd, &flags);
2545 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2546 ppr_options, AHD_TRANS_GOAL, FALSE);
2547 ahd_unlock(ahd, &flags);
2548 }
2549
2550 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2551 {
2552 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2553 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2554 struct ahd_tmode_tstate *tstate;
2555 struct ahd_initiator_tinfo *tinfo
2556 = ahd_fetch_transinfo(ahd,
2557 starget->channel + 'A',
2558 shost->this_id, starget->id, &tstate);
2559 struct ahd_devinfo devinfo;
2560 unsigned int ppr_options = tinfo->goal.ppr_options
2561 & ~MSG_EXT_PPR_QAS_REQ;
2562 unsigned int period = tinfo->goal.period;
2563 unsigned int dt;
2564 unsigned long flags;
2565
2566 #ifdef AHD_DEBUG
2567 if ((ahd_debug & AHD_SHOW_DV) != 0)
2568 printf("%s: %s QAS\n", ahd_name(ahd),
2569 qas ? "enabling" : "disabling");
2570 #endif
2571
2572 if (qas) {
2573 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2574 }
2575
2576 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2577
2578 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2579 starget->channel + 'A', ROLE_INITIATOR);
2580 ahd_find_syncrate(ahd, &period, &ppr_options,
2581 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2582
2583 ahd_lock(ahd, &flags);
2584 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2585 ppr_options, AHD_TRANS_GOAL, FALSE);
2586 ahd_unlock(ahd, &flags);
2587 }
2588
2589 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2590 {
2591 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2592 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2593 struct ahd_tmode_tstate *tstate;
2594 struct ahd_initiator_tinfo *tinfo
2595 = ahd_fetch_transinfo(ahd,
2596 starget->channel + 'A',
2597 shost->this_id, starget->id, &tstate);
2598 struct ahd_devinfo devinfo;
2599 unsigned int ppr_options = tinfo->goal.ppr_options
2600 & ~MSG_EXT_PPR_IU_REQ;
2601 unsigned int period = tinfo->goal.period;
2602 unsigned int dt;
2603 unsigned long flags;
2604
2605 #ifdef AHD_DEBUG
2606 if ((ahd_debug & AHD_SHOW_DV) != 0)
2607 printf("%s: %s IU\n", ahd_name(ahd),
2608 iu ? "enabling" : "disabling");
2609 #endif
2610
2611 if (iu && spi_max_width(starget)) {
2612 ppr_options |= MSG_EXT_PPR_IU_REQ;
2613 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2614 }
2615
2616 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2617
2618 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2619 starget->channel + 'A', ROLE_INITIATOR);
2620 ahd_find_syncrate(ahd, &period, &ppr_options,
2621 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2622
2623 ahd_lock(ahd, &flags);
2624 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2625 ppr_options, AHD_TRANS_GOAL, FALSE);
2626 ahd_unlock(ahd, &flags);
2627 }
2628
2629 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2630 {
2631 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2632 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2633 struct ahd_tmode_tstate *tstate;
2634 struct ahd_initiator_tinfo *tinfo
2635 = ahd_fetch_transinfo(ahd,
2636 starget->channel + 'A',
2637 shost->this_id, starget->id, &tstate);
2638 struct ahd_devinfo devinfo;
2639 unsigned int ppr_options = tinfo->goal.ppr_options
2640 & ~MSG_EXT_PPR_RD_STRM;
2641 unsigned int period = tinfo->goal.period;
2642 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2643 unsigned long flags;
2644
2645 #ifdef AHD_DEBUG
2646 if ((ahd_debug & AHD_SHOW_DV) != 0)
2647 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2648 rdstrm ? "enabling" : "disabling");
2649 #endif
2650
2651 if (rdstrm && spi_max_width(starget))
2652 ppr_options |= MSG_EXT_PPR_RD_STRM;
2653
2654 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2655 starget->channel + 'A', ROLE_INITIATOR);
2656 ahd_find_syncrate(ahd, &period, &ppr_options,
2657 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2658
2659 ahd_lock(ahd, &flags);
2660 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2661 ppr_options, AHD_TRANS_GOAL, FALSE);
2662 ahd_unlock(ahd, &flags);
2663 }
2664
2665 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2666 {
2667 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2668 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2669 struct ahd_tmode_tstate *tstate;
2670 struct ahd_initiator_tinfo *tinfo
2671 = ahd_fetch_transinfo(ahd,
2672 starget->channel + 'A',
2673 shost->this_id, starget->id, &tstate);
2674 struct ahd_devinfo devinfo;
2675 unsigned int ppr_options = tinfo->goal.ppr_options
2676 & ~MSG_EXT_PPR_WR_FLOW;
2677 unsigned int period = tinfo->goal.period;
2678 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2679 unsigned long flags;
2680
2681 #ifdef AHD_DEBUG
2682 if ((ahd_debug & AHD_SHOW_DV) != 0)
2683 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2684 wrflow ? "enabling" : "disabling");
2685 #endif
2686
2687 if (wrflow && spi_max_width(starget))
2688 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2689
2690 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2691 starget->channel + 'A', ROLE_INITIATOR);
2692 ahd_find_syncrate(ahd, &period, &ppr_options,
2693 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2694
2695 ahd_lock(ahd, &flags);
2696 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2697 ppr_options, AHD_TRANS_GOAL, FALSE);
2698 ahd_unlock(ahd, &flags);
2699 }
2700
2701 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2702 {
2703 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2704 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2705 struct ahd_tmode_tstate *tstate;
2706 struct ahd_initiator_tinfo *tinfo
2707 = ahd_fetch_transinfo(ahd,
2708 starget->channel + 'A',
2709 shost->this_id, starget->id, &tstate);
2710 struct ahd_devinfo devinfo;
2711 unsigned int ppr_options = tinfo->goal.ppr_options
2712 & ~MSG_EXT_PPR_RTI;
2713 unsigned int period = tinfo->goal.period;
2714 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2715 unsigned long flags;
2716
2717 if ((ahd->features & AHD_RTI) == 0) {
2718 #ifdef AHD_DEBUG
2719 if ((ahd_debug & AHD_SHOW_DV) != 0)
2720 printf("%s: RTI not available\n", ahd_name(ahd));
2721 #endif
2722 return;
2723 }
2724
2725 #ifdef AHD_DEBUG
2726 if ((ahd_debug & AHD_SHOW_DV) != 0)
2727 printf("%s: %s RTI\n", ahd_name(ahd),
2728 rti ? "enabling" : "disabling");
2729 #endif
2730
2731 if (rti && spi_max_width(starget))
2732 ppr_options |= MSG_EXT_PPR_RTI;
2733
2734 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2735 starget->channel + 'A', ROLE_INITIATOR);
2736 ahd_find_syncrate(ahd, &period, &ppr_options,
2737 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2738
2739 ahd_lock(ahd, &flags);
2740 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2741 ppr_options, AHD_TRANS_GOAL, FALSE);
2742 ahd_unlock(ahd, &flags);
2743 }
2744
2745 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2746 {
2747 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2748 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2749 struct ahd_tmode_tstate *tstate;
2750 struct ahd_initiator_tinfo *tinfo
2751 = ahd_fetch_transinfo(ahd,
2752 starget->channel + 'A',
2753 shost->this_id, starget->id, &tstate);
2754 struct ahd_devinfo devinfo;
2755 unsigned int ppr_options = tinfo->goal.ppr_options
2756 & ~MSG_EXT_PPR_PCOMP_EN;
2757 unsigned int period = tinfo->goal.period;
2758 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2759 unsigned long flags;
2760
2761 #ifdef AHD_DEBUG
2762 if ((ahd_debug & AHD_SHOW_DV) != 0)
2763 printf("%s: %s Precompensation\n", ahd_name(ahd),
2764 pcomp ? "Enable" : "Disable");
2765 #endif
2766
2767 if (pcomp && spi_max_width(starget)) {
2768 uint8_t precomp;
2769
2770 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2771 const struct ahd_linux_iocell_opts *iocell_opts;
2772
2773 iocell_opts = &aic79xx_iocell_info[ahd->unit];
2774 precomp = iocell_opts->precomp;
2775 } else {
2776 precomp = AIC79XX_DEFAULT_PRECOMP;
2777 }
2778 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2779 AHD_SET_PRECOMP(ahd, precomp);
2780 } else {
2781 AHD_SET_PRECOMP(ahd, 0);
2782 }
2783
2784 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2785 starget->channel + 'A', ROLE_INITIATOR);
2786 ahd_find_syncrate(ahd, &period, &ppr_options,
2787 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2788
2789 ahd_lock(ahd, &flags);
2790 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2791 ppr_options, AHD_TRANS_GOAL, FALSE);
2792 ahd_unlock(ahd, &flags);
2793 }
2794
2795 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2796 {
2797 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2798 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2799 struct ahd_tmode_tstate *tstate;
2800 struct ahd_initiator_tinfo *tinfo
2801 = ahd_fetch_transinfo(ahd,
2802 starget->channel + 'A',
2803 shost->this_id, starget->id, &tstate);
2804 struct ahd_devinfo devinfo;
2805 unsigned int ppr_options = tinfo->goal.ppr_options
2806 & ~MSG_EXT_PPR_HOLD_MCS;
2807 unsigned int period = tinfo->goal.period;
2808 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2809 unsigned long flags;
2810
2811 if (hold && spi_max_width(starget))
2812 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2813
2814 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2815 starget->channel + 'A', ROLE_INITIATOR);
2816 ahd_find_syncrate(ahd, &period, &ppr_options,
2817 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2818
2819 ahd_lock(ahd, &flags);
2820 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2821 ppr_options, AHD_TRANS_GOAL, FALSE);
2822 ahd_unlock(ahd, &flags);
2823 }
2824
2825 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2826 {
2827 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2828 unsigned long flags;
2829 u8 mode;
2830
2831 ahd_lock(ahd, &flags);
2832 ahd_pause(ahd);
2833 mode = ahd_inb(ahd, SBLKCTL);
2834 ahd_unpause(ahd);
2835 ahd_unlock(ahd, &flags);
2836
2837 if (mode & ENAB40)
2838 spi_signalling(shost) = SPI_SIGNAL_LVD;
2839 else if (mode & ENAB20)
2840 spi_signalling(shost) = SPI_SIGNAL_SE;
2841 else
2842 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2843 }
2844
2845 static struct spi_function_template ahd_linux_transport_functions = {
2846 .set_offset = ahd_linux_set_offset,
2847 .show_offset = 1,
2848 .set_period = ahd_linux_set_period,
2849 .show_period = 1,
2850 .set_width = ahd_linux_set_width,
2851 .show_width = 1,
2852 .set_dt = ahd_linux_set_dt,
2853 .show_dt = 1,
2854 .set_iu = ahd_linux_set_iu,
2855 .show_iu = 1,
2856 .set_qas = ahd_linux_set_qas,
2857 .show_qas = 1,
2858 .set_rd_strm = ahd_linux_set_rd_strm,
2859 .show_rd_strm = 1,
2860 .set_wr_flow = ahd_linux_set_wr_flow,
2861 .show_wr_flow = 1,
2862 .set_rti = ahd_linux_set_rti,
2863 .show_rti = 1,
2864 .set_pcomp_en = ahd_linux_set_pcomp_en,
2865 .show_pcomp_en = 1,
2866 .set_hold_mcs = ahd_linux_set_hold_mcs,
2867 .show_hold_mcs = 1,
2868 .get_signalling = ahd_linux_get_signalling,
2869 };
2870
2871 static int __init
2872 ahd_linux_init(void)
2873 {
2874 int error = 0;
2875
2876 /*
2877 * If we've been passed any parameters, process them now.
2878 */
2879 if (aic79xx)
2880 aic79xx_setup(aic79xx);
2881
2882 ahd_linux_transport_template =
2883 spi_attach_transport(&ahd_linux_transport_functions);
2884 if (!ahd_linux_transport_template)
2885 return -ENODEV;
2886
2887 scsi_transport_reserve_device(ahd_linux_transport_template,
2888 sizeof(struct ahd_linux_device));
2889
2890 error = ahd_linux_pci_init();
2891 if (error)
2892 spi_release_transport(ahd_linux_transport_template);
2893 return error;
2894 }
2895
2896 static void __exit
2897 ahd_linux_exit(void)
2898 {
2899 ahd_linux_pci_exit();
2900 spi_release_transport(ahd_linux_transport_template);
2901 }
2902
2903 module_init(ahd_linux_init);
2904 module_exit(ahd_linux_exit);
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