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rcv reorder queue bugfix
[cor_2_6_31.git] / drivers / scsi / aic7xxx / aic79xx_osm.c
blob75b23317bd26f100120efd04517bf79dda723852
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 /* don't negotiate packetized (IU) transfers */
631 spi_max_iu(starget) = 0;
632 } else {
633 if ((ahd->features & AHD_RTI) == 0)
634 spi_rti(starget) = 0;
635 }
636
637 if ((flags & CFQAS) == 0)
638 spi_max_qas(starget) = 0;
639
640 /* Transinfo values have been set to BIOS settings */
641 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
642 spi_min_period(starget) = tinfo->user.period;
643 spi_max_offset(starget) = tinfo->user.offset;
644 }
645
646 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
647 starget->id, &tstate);
648 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
649 CAM_LUN_WILDCARD, channel,
650 ROLE_INITIATOR);
651 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
652 AHD_TRANS_GOAL, /*paused*/FALSE);
653 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
654 AHD_TRANS_GOAL, /*paused*/FALSE);
655 ahd_unlock(ahd, &flags);
656
657 return 0;
658 }
659
660 static void
661 ahd_linux_target_destroy(struct scsi_target *starget)
662 {
663 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
664
665 *ahd_targp = NULL;
666 }
667
668 static int
669 ahd_linux_slave_alloc(struct scsi_device *sdev)
670 {
671 struct ahd_softc *ahd =
672 *((struct ahd_softc **)sdev->host->hostdata);
673 struct ahd_linux_device *dev;
674
675 if (bootverbose)
676 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
677
678 dev = scsi_transport_device_data(sdev);
679 memset(dev, 0, sizeof(*dev));
680
681 /*
682 * We start out life using untagged
683 * transactions of which we allow one.
684 */
685 dev->openings = 1;
686
687 /*
688 * Set maxtags to 0. This will be changed if we
689 * later determine that we are dealing with
690 * a tagged queuing capable device.
691 */
692 dev->maxtags = 0;
693
694 return (0);
695 }
696
697 static int
698 ahd_linux_slave_configure(struct scsi_device *sdev)
699 {
700 struct ahd_softc *ahd;
701
702 ahd = *((struct ahd_softc **)sdev->host->hostdata);
703 if (bootverbose)
704 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
705
706 ahd_linux_device_queue_depth(sdev);
707
708 /* Initial Domain Validation */
709 if (!spi_initial_dv(sdev->sdev_target))
710 spi_dv_device(sdev);
711
712 return 0;
713 }
714
715 #if defined(__i386__)
716 /*
717 * Return the disk geometry for the given SCSI device.
718 */
719 static int
720 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
721 sector_t capacity, int geom[])
722 {
723 uint8_t *bh;
724 int heads;
725 int sectors;
726 int cylinders;
727 int ret;
728 int extended;
729 struct ahd_softc *ahd;
730
731 ahd = *((struct ahd_softc **)sdev->host->hostdata);
732
733 bh = scsi_bios_ptable(bdev);
734 if (bh) {
735 ret = scsi_partsize(bh, capacity,
736 &geom[2], &geom[0], &geom[1]);
737 kfree(bh);
738 if (ret != -1)
739 return (ret);
740 }
741 heads = 64;
742 sectors = 32;
743 cylinders = aic_sector_div(capacity, heads, sectors);
744
745 if (aic79xx_extended != 0)
746 extended = 1;
747 else
748 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
749 if (extended && cylinders >= 1024) {
750 heads = 255;
751 sectors = 63;
752 cylinders = aic_sector_div(capacity, heads, sectors);
753 }
754 geom[0] = heads;
755 geom[1] = sectors;
756 geom[2] = cylinders;
757 return (0);
758 }
759 #endif
760
761 /*
762 * Abort the current SCSI command(s).
763 */
764 static int
765 ahd_linux_abort(struct scsi_cmnd *cmd)
766 {
767 int error;
768
769 error = ahd_linux_queue_abort_cmd(cmd);
770
771 return error;
772 }
773
774 /*
775 * Attempt to send a target reset message to the device that timed out.
776 */
777 static int
778 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
779 {
780 struct ahd_softc *ahd;
781 struct ahd_linux_device *dev;
782 struct scb *reset_scb;
783 u_int cdb_byte;
784 int retval = SUCCESS;
785 int paused;
786 int wait;
787 struct ahd_initiator_tinfo *tinfo;
788 struct ahd_tmode_tstate *tstate;
789 unsigned long flags;
790 DECLARE_COMPLETION_ONSTACK(done);
791
792 reset_scb = NULL;
793 paused = FALSE;
794 wait = FALSE;
795 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
796
797 scmd_printk(KERN_INFO, cmd,
798 "Attempting to queue a TARGET RESET message:");
799
800 printf("CDB:");
801 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
802 printf(" 0x%x", cmd->cmnd[cdb_byte]);
803 printf("\n");
804
805 /*
806 * Determine if we currently own this command.
807 */
808 dev = scsi_transport_device_data(cmd->device);
809
810 if (dev == NULL) {
811 /*
812 * No target device for this command exists,
813 * so we must not still own the command.
814 */
815 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
816 return SUCCESS;
817 }
818
819 /*
820 * Generate us a new SCB
821 */
822 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
823 if (!reset_scb) {
824 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
825 return FAILED;
826 }
827
828 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
829 cmd->device->id, &tstate);
830 reset_scb->io_ctx = cmd;
831 reset_scb->platform_data->dev = dev;
832 reset_scb->sg_count = 0;
833 ahd_set_residual(reset_scb, 0);
834 ahd_set_sense_residual(reset_scb, 0);
835 reset_scb->platform_data->xfer_len = 0;
836 reset_scb->hscb->control = 0;
837 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
838 reset_scb->hscb->lun = cmd->device->lun;
839 reset_scb->hscb->cdb_len = 0;
840 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
841 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
842 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
843 reset_scb->flags |= SCB_PACKETIZED;
844 } else {
845 reset_scb->hscb->control |= MK_MESSAGE;
846 }
847 dev->openings--;
848 dev->active++;
849 dev->commands_issued++;
850
851 ahd_lock(ahd, &flags);
852
853 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
854 ahd_queue_scb(ahd, reset_scb);
855
856 ahd->platform_data->eh_done = &done;
857 ahd_unlock(ahd, &flags);
858
859 printf("%s: Device reset code sleeping\n", ahd_name(ahd));
860 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
861 ahd_lock(ahd, &flags);
862 ahd->platform_data->eh_done = NULL;
863 ahd_unlock(ahd, &flags);
864 printf("%s: Device reset timer expired (active %d)\n",
865 ahd_name(ahd), dev->active);
866 retval = FAILED;
867 }
868 printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
869
870 return (retval);
871 }
872
873 /*
874 * Reset the SCSI bus.
875 */
876 static int
877 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
878 {
879 struct ahd_softc *ahd;
880 int found;
881 unsigned long flags;
882
883 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
884 #ifdef AHD_DEBUG
885 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
886 printf("%s: Bus reset called for cmd %p\n",
887 ahd_name(ahd), cmd);
888 #endif
889 ahd_lock(ahd, &flags);
890
891 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
892 /*initiate reset*/TRUE);
893 ahd_unlock(ahd, &flags);
894
895 if (bootverbose)
896 printf("%s: SCSI bus reset delivered. "
897 "%d SCBs aborted.\n", ahd_name(ahd), found);
898
899 return (SUCCESS);
900 }
901
902 struct scsi_host_template aic79xx_driver_template = {
903 .module = THIS_MODULE,
904 .name = "aic79xx",
905 .proc_name = "aic79xx",
906 .proc_info = ahd_linux_proc_info,
907 .info = ahd_linux_info,
908 .queuecommand = ahd_linux_queue,
909 .eh_abort_handler = ahd_linux_abort,
910 .eh_device_reset_handler = ahd_linux_dev_reset,
911 .eh_bus_reset_handler = ahd_linux_bus_reset,
912 #if defined(__i386__)
913 .bios_param = ahd_linux_biosparam,
914 #endif
915 .can_queue = AHD_MAX_QUEUE,
916 .this_id = -1,
917 .max_sectors = 8192,
918 .cmd_per_lun = 2,
919 .use_clustering = ENABLE_CLUSTERING,
920 .slave_alloc = ahd_linux_slave_alloc,
921 .slave_configure = ahd_linux_slave_configure,
922 .target_alloc = ahd_linux_target_alloc,
923 .target_destroy = ahd_linux_target_destroy,
924 };
925
926 /******************************** Bus DMA *************************************/
927 int
928 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
929 bus_size_t alignment, bus_size_t boundary,
930 dma_addr_t lowaddr, dma_addr_t highaddr,
931 bus_dma_filter_t *filter, void *filterarg,
932 bus_size_t maxsize, int nsegments,
933 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
934 {
935 bus_dma_tag_t dmat;
936
937 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
938 if (dmat == NULL)
939 return (ENOMEM);
940
941 /*
942 * Linux is very simplistic about DMA memory. For now don't
943 * maintain all specification information. Once Linux supplies
944 * better facilities for doing these operations, or the
945 * needs of this particular driver change, we might need to do
946 * more here.
947 */
948 dmat->alignment = alignment;
949 dmat->boundary = boundary;
950 dmat->maxsize = maxsize;
951 *ret_tag = dmat;
952 return (0);
953 }
954
955 void
956 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
957 {
958 free(dmat, M_DEVBUF);
959 }
960
961 int
962 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
963 int flags, bus_dmamap_t *mapp)
964 {
965 *vaddr = pci_alloc_consistent(ahd->dev_softc,
966 dmat->maxsize, mapp);
967 if (*vaddr == NULL)
968 return (ENOMEM);
969 return(0);
970 }
971
972 void
973 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
974 void* vaddr, bus_dmamap_t map)
975 {
976 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
977 vaddr, map);
978 }
979
980 int
981 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
982 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
983 void *cb_arg, int flags)
984 {
985 /*
986 * Assume for now that this will only be used during
987 * initialization and not for per-transaction buffer mapping.
988 */
989 bus_dma_segment_t stack_sg;
990
991 stack_sg.ds_addr = map;
992 stack_sg.ds_len = dmat->maxsize;
993 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
994 return (0);
995 }
996
997 void
998 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
999 {
1000 }
1001
1002 int
1003 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1004 {
1005 /* Nothing to do */
1006 return (0);
1007 }
1008
1009 /********************* Platform Dependent Functions ***************************/
1010 static void
1011 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
1012 {
1013
1014 if ((instance >= 0)
1015 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
1016 uint8_t *iocell_info;
1017
1018 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1019 iocell_info[index] = value & 0xFFFF;
1020 if (bootverbose)
1021 printf("iocell[%d:%ld] = %d\n", instance, index, value);
1022 }
1023 }
1024
1025 static void
1026 ahd_linux_setup_tag_info_global(char *p)
1027 {
1028 int tags, i, j;
1029
1030 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1031 printf("Setting Global Tags= %d\n", tags);
1032
1033 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
1034 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1035 aic79xx_tag_info[i].tag_commands[j] = tags;
1036 }
1037 }
1038 }
1039
1040 static void
1041 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1042 {
1043
1044 if ((instance >= 0) && (targ >= 0)
1045 && (instance < ARRAY_SIZE(aic79xx_tag_info))
1046 && (targ < AHD_NUM_TARGETS)) {
1047 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1048 if (bootverbose)
1049 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
1050 }
1051 }
1052
1053 static char *
1054 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
1055 void (*callback)(u_long, int, int, int32_t),
1056 u_long callback_arg)
1057 {
1058 char *tok_end;
1059 char *tok_end2;
1060 int i;
1061 int instance;
1062 int targ;
1063 int done;
1064 char tok_list[] = {'.', ',', '{', '}', '\0'};
1065
1066 /* All options use a ':' name/arg separator */
1067 if (*opt_arg != ':')
1068 return (opt_arg);
1069 opt_arg++;
1070 instance = -1;
1071 targ = -1;
1072 done = FALSE;
1073 /*
1074 * Restore separator that may be in
1075 * the middle of our option argument.
1076 */
1077 tok_end = strchr(opt_arg, '\0');
1078 if (tok_end < end)
1079 *tok_end = ',';
1080 while (!done) {
1081 switch (*opt_arg) {
1082 case '{':
1083 if (instance == -1) {
1084 instance = 0;
1085 } else {
1086 if (depth > 1) {
1087 if (targ == -1)
1088 targ = 0;
1089 } else {
1090 printf("Malformed Option %s\n",
1091 opt_name);
1092 done = TRUE;
1093 }
1094 }
1095 opt_arg++;
1096 break;
1097 case '}':
1098 if (targ != -1)
1099 targ = -1;
1100 else if (instance != -1)
1101 instance = -1;
1102 opt_arg++;
1103 break;
1104 case ',':
1105 case '.':
1106 if (instance == -1)
1107 done = TRUE;
1108 else if (targ >= 0)
1109 targ++;
1110 else if (instance >= 0)
1111 instance++;
1112 opt_arg++;
1113 break;
1114 case '\0':
1115 done = TRUE;
1116 break;
1117 default:
1118 tok_end = end;
1119 for (i = 0; tok_list[i]; i++) {
1120 tok_end2 = strchr(opt_arg, tok_list[i]);
1121 if ((tok_end2) && (tok_end2 < tok_end))
1122 tok_end = tok_end2;
1123 }
1124 callback(callback_arg, instance, targ,
1125 simple_strtol(opt_arg, NULL, 0));
1126 opt_arg = tok_end;
1127 break;
1128 }
1129 }
1130 return (opt_arg);
1131 }
1132
1133 /*
1134 * Handle Linux boot parameters. This routine allows for assigning a value
1135 * to a parameter with a ':' between the parameter and the value.
1136 * ie. aic79xx=stpwlev:1,extended
1137 */
1138 static int
1139 aic79xx_setup(char *s)
1140 {
1141 int i, n;
1142 char *p;
1143 char *end;
1144
1145 static const struct {
1146 const char *name;
1147 uint32_t *flag;
1148 } options[] = {
1149 { "extended", &aic79xx_extended },
1150 { "no_reset", &aic79xx_no_reset },
1151 { "verbose", &aic79xx_verbose },
1152 { "allow_memio", &aic79xx_allow_memio},
1153 #ifdef AHD_DEBUG
1154 { "debug", &ahd_debug },
1155 #endif
1156 { "periodic_otag", &aic79xx_periodic_otag },
1157 { "pci_parity", &aic79xx_pci_parity },
1158 { "seltime", &aic79xx_seltime },
1159 { "tag_info", NULL },
1160 { "global_tag_depth", NULL},
1161 { "slewrate", NULL },
1162 { "precomp", NULL },
1163 { "amplitude", NULL },
1164 { "slowcrc", &aic79xx_slowcrc },
1165 };
1166
1167 end = strchr(s, '\0');
1168
1169 /*
1170 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1171 * will never be 0 in this case.
1172 */
1173 n = 0;
1174
1175 while ((p = strsep(&s, ",.")) != NULL) {
1176 if (*p == '\0')
1177 continue;
1178 for (i = 0; i < ARRAY_SIZE(options); i++) {
1179
1180 n = strlen(options[i].name);
1181 if (strncmp(options[i].name, p, n) == 0)
1182 break;
1183 }
1184 if (i == ARRAY_SIZE(options))
1185 continue;
1186
1187 if (strncmp(p, "global_tag_depth", n) == 0) {
1188 ahd_linux_setup_tag_info_global(p + n);
1189 } else if (strncmp(p, "tag_info", n) == 0) {
1190 s = ahd_parse_brace_option("tag_info", p + n, end,
1191 2, ahd_linux_setup_tag_info, 0);
1192 } else if (strncmp(p, "slewrate", n) == 0) {
1193 s = ahd_parse_brace_option("slewrate",
1194 p + n, end, 1, ahd_linux_setup_iocell_info,
1195 AIC79XX_SLEWRATE_INDEX);
1196 } else if (strncmp(p, "precomp", n) == 0) {
1197 s = ahd_parse_brace_option("precomp",
1198 p + n, end, 1, ahd_linux_setup_iocell_info,
1199 AIC79XX_PRECOMP_INDEX);
1200 } else if (strncmp(p, "amplitude", n) == 0) {
1201 s = ahd_parse_brace_option("amplitude",
1202 p + n, end, 1, ahd_linux_setup_iocell_info,
1203 AIC79XX_AMPLITUDE_INDEX);
1204 } else if (p[n] == ':') {
1205 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1206 } else if (!strncmp(p, "verbose", n)) {
1207 *(options[i].flag) = 1;
1208 } else {
1209 *(options[i].flag) ^= 0xFFFFFFFF;
1210 }
1211 }
1212 return 1;
1213 }
1214
1215 __setup("aic79xx=", aic79xx_setup);
1216
1217 uint32_t aic79xx_verbose;
1218
1219 int
1220 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1221 {
1222 char buf[80];
1223 struct Scsi_Host *host;
1224 char *new_name;
1225 u_long s;
1226 int retval;
1227
1228 template->name = ahd->description;
1229 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1230 if (host == NULL)
1231 return (ENOMEM);
1232
1233 *((struct ahd_softc **)host->hostdata) = ahd;
1234 ahd->platform_data->host = host;
1235 host->can_queue = AHD_MAX_QUEUE;
1236 host->cmd_per_lun = 2;
1237 host->sg_tablesize = AHD_NSEG;
1238 host->this_id = ahd->our_id;
1239 host->irq = ahd->platform_data->irq;
1240 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1241 host->max_lun = AHD_NUM_LUNS;
1242 host->max_channel = 0;
1243 host->sg_tablesize = AHD_NSEG;
1244 ahd_lock(ahd, &s);
1245 ahd_set_unit(ahd, ahd_linux_unit++);
1246 ahd_unlock(ahd, &s);
1247 sprintf(buf, "scsi%d", host->host_no);
1248 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1249 if (new_name != NULL) {
1250 strcpy(new_name, buf);
1251 ahd_set_name(ahd, new_name);
1252 }
1253 host->unique_id = ahd->unit;
1254 ahd_linux_initialize_scsi_bus(ahd);
1255 ahd_intr_enable(ahd, TRUE);
1256
1257 host->transportt = ahd_linux_transport_template;
1258
1259 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1260 if (retval) {
1261 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1262 scsi_host_put(host);
1263 return retval;
1264 }
1265
1266 scsi_scan_host(host);
1267 return 0;
1268 }
1269
1270 /*
1271 * Place the SCSI bus into a known state by either resetting it,
1272 * or forcing transfer negotiations on the next command to any
1273 * target.
1274 */
1275 static void
1276 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1277 {
1278 u_int target_id;
1279 u_int numtarg;
1280 unsigned long s;
1281
1282 target_id = 0;
1283 numtarg = 0;
1284
1285 if (aic79xx_no_reset != 0)
1286 ahd->flags &= ~AHD_RESET_BUS_A;
1287
1288 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1289 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1290 else
1291 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1292
1293 ahd_lock(ahd, &s);
1294
1295 /*
1296 * Force negotiation to async for all targets that
1297 * will not see an initial bus reset.
1298 */
1299 for (; target_id < numtarg; target_id++) {
1300 struct ahd_devinfo devinfo;
1301 struct ahd_initiator_tinfo *tinfo;
1302 struct ahd_tmode_tstate *tstate;
1303
1304 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1305 target_id, &tstate);
1306 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1307 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1308 ahd_update_neg_request(ahd, &devinfo, tstate,
1309 tinfo, AHD_NEG_ALWAYS);
1310 }
1311 ahd_unlock(ahd, &s);
1312 /* Give the bus some time to recover */
1313 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1314 ahd_freeze_simq(ahd);
1315 msleep(AIC79XX_RESET_DELAY);
1316 ahd_release_simq(ahd);
1317 }
1318 }
1319
1320 int
1321 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1322 {
1323 ahd->platform_data =
1324 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1325 if (ahd->platform_data == NULL)
1326 return (ENOMEM);
1327 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1328 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1329 ahd_lockinit(ahd);
1330 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1331 return (0);
1332 }
1333
1334 void
1335 ahd_platform_free(struct ahd_softc *ahd)
1336 {
1337 struct scsi_target *starget;
1338 int i;
1339
1340 if (ahd->platform_data != NULL) {
1341 /* destroy all of the device and target objects */
1342 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1343 starget = ahd->platform_data->starget[i];
1344 if (starget != NULL) {
1345 ahd->platform_data->starget[i] = NULL;
1346 }
1347 }
1348
1349 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1350 free_irq(ahd->platform_data->irq, ahd);
1351 if (ahd->tags[0] == BUS_SPACE_PIO
1352 && ahd->bshs[0].ioport != 0)
1353 release_region(ahd->bshs[0].ioport, 256);
1354 if (ahd->tags[1] == BUS_SPACE_PIO
1355 && ahd->bshs[1].ioport != 0)
1356 release_region(ahd->bshs[1].ioport, 256);
1357 if (ahd->tags[0] == BUS_SPACE_MEMIO
1358 && ahd->bshs[0].maddr != NULL) {
1359 iounmap(ahd->bshs[0].maddr);
1360 release_mem_region(ahd->platform_data->mem_busaddr,
1361 0x1000);
1362 }
1363 if (ahd->platform_data->host)
1364 scsi_host_put(ahd->platform_data->host);
1365
1366 free(ahd->platform_data, M_DEVBUF);
1367 }
1368 }
1369
1370 void
1371 ahd_platform_init(struct ahd_softc *ahd)
1372 {
1373 /*
1374 * Lookup and commit any modified IO Cell options.
1375 */
1376 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1377 const struct ahd_linux_iocell_opts *iocell_opts;
1378
1379 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1380 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1381 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1382 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1383 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1384 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1385 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1386 }
1387
1388 }
1389
1390 void
1391 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1392 {
1393 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1394 SCB_GET_CHANNEL(ahd, scb),
1395 SCB_GET_LUN(scb), SCB_LIST_NULL,
1396 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1397 }
1398
1399 void
1400 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1401 struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1402 {
1403 struct ahd_linux_device *dev;
1404 int was_queuing;
1405 int now_queuing;
1406
1407 if (sdev == NULL)
1408 return;
1409
1410 dev = scsi_transport_device_data(sdev);
1411
1412 if (dev == NULL)
1413 return;
1414 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1415 switch (alg) {
1416 default:
1417 case AHD_QUEUE_NONE:
1418 now_queuing = 0;
1419 break;
1420 case AHD_QUEUE_BASIC:
1421 now_queuing = AHD_DEV_Q_BASIC;
1422 break;
1423 case AHD_QUEUE_TAGGED:
1424 now_queuing = AHD_DEV_Q_TAGGED;
1425 break;
1426 }
1427 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1428 && (was_queuing != now_queuing)
1429 && (dev->active != 0)) {
1430 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1431 dev->qfrozen++;
1432 }
1433
1434 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1435 if (now_queuing) {
1436 u_int usertags;
1437
1438 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1439 if (!was_queuing) {
1440 /*
1441 * Start out agressively and allow our
1442 * dynamic queue depth algorithm to take
1443 * care of the rest.
1444 */
1445 dev->maxtags = usertags;
1446 dev->openings = dev->maxtags - dev->active;
1447 }
1448 if (dev->maxtags == 0) {
1449 /*
1450 * Queueing is disabled by the user.
1451 */
1452 dev->openings = 1;
1453 } else if (alg == AHD_QUEUE_TAGGED) {
1454 dev->flags |= AHD_DEV_Q_TAGGED;
1455 if (aic79xx_periodic_otag != 0)
1456 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1457 } else
1458 dev->flags |= AHD_DEV_Q_BASIC;
1459 } else {
1460 /* We can only have one opening. */
1461 dev->maxtags = 0;
1462 dev->openings = 1 - dev->active;
1463 }
1464
1465 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1466 case AHD_DEV_Q_BASIC:
1467 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1468 scsi_activate_tcq(sdev, dev->openings + dev->active);
1469 break;
1470 case AHD_DEV_Q_TAGGED:
1471 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1472 scsi_activate_tcq(sdev, dev->openings + dev->active);
1473 break;
1474 default:
1475 /*
1476 * We allow the OS to queue 2 untagged transactions to
1477 * us at any time even though we can only execute them
1478 * serially on the controller/device. This should
1479 * remove some latency.
1480 */
1481 scsi_deactivate_tcq(sdev, 1);
1482 break;
1483 }
1484 }
1485
1486 int
1487 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1488 int lun, u_int tag, role_t role, uint32_t status)
1489 {
1490 return 0;
1491 }
1492
1493 static u_int
1494 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1495 {
1496 static int warned_user;
1497 u_int tags;
1498
1499 tags = 0;
1500 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1501 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1502
1503 if (warned_user == 0) {
1504 printf(KERN_WARNING
1505 "aic79xx: WARNING: Insufficient tag_info instances\n"
1506 "aic79xx: for installed controllers. Using defaults\n"
1507 "aic79xx: Please update the aic79xx_tag_info array in\n"
1508 "aic79xx: the aic79xx_osm.c source file.\n");
1509 warned_user++;
1510 }
1511 tags = AHD_MAX_QUEUE;
1512 } else {
1513 adapter_tag_info_t *tag_info;
1514
1515 tag_info = &aic79xx_tag_info[ahd->unit];
1516 tags = tag_info->tag_commands[devinfo->target_offset];
1517 if (tags > AHD_MAX_QUEUE)
1518 tags = AHD_MAX_QUEUE;
1519 }
1520 }
1521 return (tags);
1522 }
1523
1524 /*
1525 * Determines the queue depth for a given device.
1526 */
1527 static void
1528 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1529 {
1530 struct ahd_devinfo devinfo;
1531 u_int tags;
1532 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1533
1534 ahd_compile_devinfo(&devinfo,
1535 ahd->our_id,
1536 sdev->sdev_target->id, sdev->lun,
1537 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1538 ROLE_INITIATOR);
1539 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1540 if (tags != 0 && sdev->tagged_supported != 0) {
1541
1542 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1543 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1544 devinfo.lun, AC_TRANSFER_NEG);
1545 ahd_print_devinfo(ahd, &devinfo);
1546 printf("Tagged Queuing enabled. Depth %d\n", tags);
1547 } else {
1548 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1549 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1550 devinfo.lun, AC_TRANSFER_NEG);
1551 }
1552 }
1553
1554 static int
1555 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1556 struct scsi_cmnd *cmd)
1557 {
1558 struct scb *scb;
1559 struct hardware_scb *hscb;
1560 struct ahd_initiator_tinfo *tinfo;
1561 struct ahd_tmode_tstate *tstate;
1562 u_int col_idx;
1563 uint16_t mask;
1564 unsigned long flags;
1565 int nseg;
1566
1567 nseg = scsi_dma_map(cmd);
1568 if (nseg < 0)
1569 return SCSI_MLQUEUE_HOST_BUSY;
1570
1571 ahd_lock(ahd, &flags);
1572
1573 /*
1574 * Get an scb to use.
1575 */
1576 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1577 cmd->device->id, &tstate);
1578 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1579 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1580 col_idx = AHD_NEVER_COL_IDX;
1581 } else {
1582 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1583 cmd->device->lun);
1584 }
1585 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1586 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1587 ahd_unlock(ahd, &flags);
1588 scsi_dma_unmap(cmd);
1589 return SCSI_MLQUEUE_HOST_BUSY;
1590 }
1591
1592 scb->io_ctx = cmd;
1593 scb->platform_data->dev = dev;
1594 hscb = scb->hscb;
1595 cmd->host_scribble = (char *)scb;
1596
1597 /*
1598 * Fill out basics of the HSCB.
1599 */
1600 hscb->control = 0;
1601 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1602 hscb->lun = cmd->device->lun;
1603 scb->hscb->task_management = 0;
1604 mask = SCB_GET_TARGET_MASK(ahd, scb);
1605
1606 if ((ahd->user_discenable & mask) != 0)
1607 hscb->control |= DISCENB;
1608
1609 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1610 scb->flags |= SCB_PACKETIZED;
1611
1612 if ((tstate->auto_negotiate & mask) != 0) {
1613 scb->flags |= SCB_AUTO_NEGOTIATE;
1614 scb->hscb->control |= MK_MESSAGE;
1615 }
1616
1617 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1618 int msg_bytes;
1619 uint8_t tag_msgs[2];
1620
1621 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1622 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1623 hscb->control |= tag_msgs[0];
1624 if (tag_msgs[0] == MSG_ORDERED_TASK)
1625 dev->commands_since_idle_or_otag = 0;
1626 } else
1627 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1628 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1629 hscb->control |= MSG_ORDERED_TASK;
1630 dev->commands_since_idle_or_otag = 0;
1631 } else {
1632 hscb->control |= MSG_SIMPLE_TASK;
1633 }
1634 }
1635
1636 hscb->cdb_len = cmd->cmd_len;
1637 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1638
1639 scb->platform_data->xfer_len = 0;
1640 ahd_set_residual(scb, 0);
1641 ahd_set_sense_residual(scb, 0);
1642 scb->sg_count = 0;
1643
1644 if (nseg > 0) {
1645 void *sg = scb->sg_list;
1646 struct scatterlist *cur_seg;
1647 int i;
1648
1649 scb->platform_data->xfer_len = 0;
1650
1651 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1652 dma_addr_t addr;
1653 bus_size_t len;
1654
1655 addr = sg_dma_address(cur_seg);
1656 len = sg_dma_len(cur_seg);
1657 scb->platform_data->xfer_len += len;
1658 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1659 i == (nseg - 1));
1660 }
1661 }
1662
1663 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1664 dev->openings--;
1665 dev->active++;
1666 dev->commands_issued++;
1667
1668 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1669 dev->commands_since_idle_or_otag++;
1670 scb->flags |= SCB_ACTIVE;
1671 ahd_queue_scb(ahd, scb);
1672
1673 ahd_unlock(ahd, &flags);
1674
1675 return 0;
1676 }
1677
1678 /*
1679 * SCSI controller interrupt handler.
1680 */
1681 irqreturn_t
1682 ahd_linux_isr(int irq, void *dev_id)
1683 {
1684 struct ahd_softc *ahd;
1685 u_long flags;
1686 int ours;
1687
1688 ahd = (struct ahd_softc *) dev_id;
1689 ahd_lock(ahd, &flags);
1690 ours = ahd_intr(ahd);
1691 ahd_unlock(ahd, &flags);
1692 return IRQ_RETVAL(ours);
1693 }
1694
1695 void
1696 ahd_send_async(struct ahd_softc *ahd, char channel,
1697 u_int target, u_int lun, ac_code code)
1698 {
1699 switch (code) {
1700 case AC_TRANSFER_NEG:
1701 {
1702 char buf[80];
1703 struct scsi_target *starget;
1704 struct info_str info;
1705 struct ahd_initiator_tinfo *tinfo;
1706 struct ahd_tmode_tstate *tstate;
1707 unsigned int target_ppr_options;
1708
1709 BUG_ON(target == CAM_TARGET_WILDCARD);
1710
1711 info.buffer = buf;
1712 info.length = sizeof(buf);
1713 info.offset = 0;
1714 info.pos = 0;
1715 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1716 target, &tstate);
1717
1718 /*
1719 * Don't bother reporting results while
1720 * negotiations are still pending.
1721 */
1722 if (tinfo->curr.period != tinfo->goal.period
1723 || tinfo->curr.width != tinfo->goal.width
1724 || tinfo->curr.offset != tinfo->goal.offset
1725 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1726 if (bootverbose == 0)
1727 break;
1728
1729 /*
1730 * Don't bother reporting results that
1731 * are identical to those last reported.
1732 */
1733 starget = ahd->platform_data->starget[target];
1734 if (starget == NULL)
1735 break;
1736
1737 target_ppr_options =
1738 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1739 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1740 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1741 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1742 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1743 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1744 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1745 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1746
1747 if (tinfo->curr.period == spi_period(starget)
1748 && tinfo->curr.width == spi_width(starget)
1749 && tinfo->curr.offset == spi_offset(starget)
1750 && tinfo->curr.ppr_options == target_ppr_options)
1751 if (bootverbose == 0)
1752 break;
1753
1754 spi_period(starget) = tinfo->curr.period;
1755 spi_width(starget) = tinfo->curr.width;
1756 spi_offset(starget) = tinfo->curr.offset;
1757 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1758 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1759 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1760 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1761 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1762 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1763 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1764 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1765 spi_display_xfer_agreement(starget);
1766 break;
1767 }
1768 case AC_SENT_BDR:
1769 {
1770 WARN_ON(lun != CAM_LUN_WILDCARD);
1771 scsi_report_device_reset(ahd->platform_data->host,
1772 channel - 'A', target);
1773 break;
1774 }
1775 case AC_BUS_RESET:
1776 if (ahd->platform_data->host != NULL) {
1777 scsi_report_bus_reset(ahd->platform_data->host,
1778 channel - 'A');
1779 }
1780 break;
1781 default:
1782 panic("ahd_send_async: Unexpected async event");
1783 }
1784 }
1785
1786 /*
1787 * Calls the higher level scsi done function and frees the scb.
1788 */
1789 void
1790 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1791 {
1792 struct scsi_cmnd *cmd;
1793 struct ahd_linux_device *dev;
1794
1795 if ((scb->flags & SCB_ACTIVE) == 0) {
1796 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1797 ahd_dump_card_state(ahd);
1798 panic("Stopping for safety");
1799 }
1800 LIST_REMOVE(scb, pending_links);
1801 cmd = scb->io_ctx;
1802 dev = scb->platform_data->dev;
1803 dev->active--;
1804 dev->openings++;
1805 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1806 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1807 dev->qfrozen--;
1808 }
1809 ahd_linux_unmap_scb(ahd, scb);
1810
1811 /*
1812 * Guard against stale sense data.
1813 * The Linux mid-layer assumes that sense
1814 * was retrieved anytime the first byte of
1815 * the sense buffer looks "sane".
1816 */
1817 cmd->sense_buffer[0] = 0;
1818 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1819 uint32_t amount_xferred;
1820
1821 amount_xferred =
1822 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1823 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1824 #ifdef AHD_DEBUG
1825 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1826 ahd_print_path(ahd, scb);
1827 printf("Set CAM_UNCOR_PARITY\n");
1828 }
1829 #endif
1830 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1831 #ifdef AHD_REPORT_UNDERFLOWS
1832 /*
1833 * This code is disabled by default as some
1834 * clients of the SCSI system do not properly
1835 * initialize the underflow parameter. This
1836 * results in spurious termination of commands
1837 * that complete as expected (e.g. underflow is
1838 * allowed as command can return variable amounts
1839 * of data.
1840 */
1841 } else if (amount_xferred < scb->io_ctx->underflow) {
1842 u_int i;
1843
1844 ahd_print_path(ahd, scb);
1845 printf("CDB:");
1846 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1847 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1848 printf("\n");
1849 ahd_print_path(ahd, scb);
1850 printf("Saw underflow (%ld of %ld bytes). "
1851 "Treated as error\n",
1852 ahd_get_residual(scb),
1853 ahd_get_transfer_length(scb));
1854 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1855 #endif
1856 } else {
1857 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1858 }
1859 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1860 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1861 }
1862
1863 if (dev->openings == 1
1864 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1865 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1866 dev->tag_success_count++;
1867 /*
1868 * Some devices deal with temporary internal resource
1869 * shortages by returning queue full. When the queue
1870 * full occurrs, we throttle back. Slowly try to get
1871 * back to our previous queue depth.
1872 */
1873 if ((dev->openings + dev->active) < dev->maxtags
1874 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1875 dev->tag_success_count = 0;
1876 dev->openings++;
1877 }
1878
1879 if (dev->active == 0)
1880 dev->commands_since_idle_or_otag = 0;
1881
1882 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1883 printf("Recovery SCB completes\n");
1884 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1885 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1886 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1887
1888 if (ahd->platform_data->eh_done)
1889 complete(ahd->platform_data->eh_done);
1890 }
1891
1892 ahd_free_scb(ahd, scb);
1893 ahd_linux_queue_cmd_complete(ahd, cmd);
1894 }
1895
1896 static void
1897 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1898 struct scsi_device *sdev, struct scb *scb)
1899 {
1900 struct ahd_devinfo devinfo;
1901 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1902
1903 ahd_compile_devinfo(&devinfo,
1904 ahd->our_id,
1905 sdev->sdev_target->id, sdev->lun,
1906 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1907 ROLE_INITIATOR);
1908
1909 /*
1910 * We don't currently trust the mid-layer to
1911 * properly deal with queue full or busy. So,
1912 * when one occurs, we tell the mid-layer to
1913 * unconditionally requeue the command to us
1914 * so that we can retry it ourselves. We also
1915 * implement our own throttling mechanism so
1916 * we don't clobber the device with too many
1917 * commands.
1918 */
1919 switch (ahd_get_scsi_status(scb)) {
1920 default:
1921 break;
1922 case SCSI_STATUS_CHECK_COND:
1923 case SCSI_STATUS_CMD_TERMINATED:
1924 {
1925 struct scsi_cmnd *cmd;
1926
1927 /*
1928 * Copy sense information to the OS's cmd
1929 * structure if it is available.
1930 */
1931 cmd = scb->io_ctx;
1932 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1933 struct scsi_status_iu_header *siu;
1934 u_int sense_size;
1935 u_int sense_offset;
1936
1937 if (scb->flags & SCB_SENSE) {
1938 sense_size = min(sizeof(struct scsi_sense_data)
1939 - ahd_get_sense_residual(scb),
1940 (u_long)SCSI_SENSE_BUFFERSIZE);
1941 sense_offset = 0;
1942 } else {
1943 /*
1944 * Copy only the sense data into the provided
1945 * buffer.
1946 */
1947 siu = (struct scsi_status_iu_header *)
1948 scb->sense_data;
1949 sense_size = min_t(size_t,
1950 scsi_4btoul(siu->sense_length),
1951 SCSI_SENSE_BUFFERSIZE);
1952 sense_offset = SIU_SENSE_OFFSET(siu);
1953 }
1954
1955 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1956 memcpy(cmd->sense_buffer,
1957 ahd_get_sense_buf(ahd, scb)
1958 + sense_offset, sense_size);
1959 cmd->result |= (DRIVER_SENSE << 24);
1960
1961 #ifdef AHD_DEBUG
1962 if (ahd_debug & AHD_SHOW_SENSE) {
1963 int i;
1964
1965 printf("Copied %d bytes of sense data at %d:",
1966 sense_size, sense_offset);
1967 for (i = 0; i < sense_size; i++) {
1968 if ((i & 0xF) == 0)
1969 printf("\n");
1970 printf("0x%x ", cmd->sense_buffer[i]);
1971 }
1972 printf("\n");
1973 }
1974 #endif
1975 }
1976 break;
1977 }
1978 case SCSI_STATUS_QUEUE_FULL:
1979 /*
1980 * By the time the core driver has returned this
1981 * command, all other commands that were queued
1982 * to us but not the device have been returned.
1983 * This ensures that dev->active is equal to
1984 * the number of commands actually queued to
1985 * the device.
1986 */
1987 dev->tag_success_count = 0;
1988 if (dev->active != 0) {
1989 /*
1990 * Drop our opening count to the number
1991 * of commands currently outstanding.
1992 */
1993 dev->openings = 0;
1994 #ifdef AHD_DEBUG
1995 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1996 ahd_print_path(ahd, scb);
1997 printf("Dropping tag count to %d\n",
1998 dev->active);
1999 }
2000 #endif
2001 if (dev->active == dev->tags_on_last_queuefull) {
2002
2003 dev->last_queuefull_same_count++;
2004 /*
2005 * If we repeatedly see a queue full
2006 * at the same queue depth, this
2007 * device has a fixed number of tag
2008 * slots. Lock in this tag depth
2009 * so we stop seeing queue fulls from
2010 * this device.
2011 */
2012 if (dev->last_queuefull_same_count
2013 == AHD_LOCK_TAGS_COUNT) {
2014 dev->maxtags = dev->active;
2015 ahd_print_path(ahd, scb);
2016 printf("Locking max tag count at %d\n",
2017 dev->active);
2018 }
2019 } else {
2020 dev->tags_on_last_queuefull = dev->active;
2021 dev->last_queuefull_same_count = 0;
2022 }
2023 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
2024 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
2025 ahd_platform_set_tags(ahd, sdev, &devinfo,
2026 (dev->flags & AHD_DEV_Q_BASIC)
2027 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2028 break;
2029 }
2030 /*
2031 * Drop down to a single opening, and treat this
2032 * as if the target returned BUSY SCSI status.
2033 */
2034 dev->openings = 1;
2035 ahd_platform_set_tags(ahd, sdev, &devinfo,
2036 (dev->flags & AHD_DEV_Q_BASIC)
2037 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2038 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
2039 }
2040 }
2041
2042 static void
2043 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
2044 {
2045 int status;
2046 int new_status = DID_OK;
2047 int do_fallback = 0;
2048 int scsi_status;
2049
2050 /*
2051 * Map CAM error codes into Linux Error codes. We
2052 * avoid the conversion so that the DV code has the
2053 * full error information available when making
2054 * state change decisions.
2055 */
2056
2057 status = ahd_cmd_get_transaction_status(cmd);
2058 switch (status) {
2059 case CAM_REQ_INPROG:
2060 case CAM_REQ_CMP:
2061 new_status = DID_OK;
2062 break;
2063 case CAM_AUTOSENSE_FAIL:
2064 new_status = DID_ERROR;
2065 /* Fallthrough */
2066 case CAM_SCSI_STATUS_ERROR:
2067 scsi_status = ahd_cmd_get_scsi_status(cmd);
2068
2069 switch(scsi_status) {
2070 case SCSI_STATUS_CMD_TERMINATED:
2071 case SCSI_STATUS_CHECK_COND:
2072 if ((cmd->result >> 24) != DRIVER_SENSE) {
2073 do_fallback = 1;
2074 } else {
2075 struct scsi_sense_data *sense;
2076
2077 sense = (struct scsi_sense_data *)
2078 cmd->sense_buffer;
2079 if (sense->extra_len >= 5 &&
2080 (sense->add_sense_code == 0x47
2081 || sense->add_sense_code == 0x48))
2082 do_fallback = 1;
2083 }
2084 break;
2085 default:
2086 break;
2087 }
2088 break;
2089 case CAM_REQ_ABORTED:
2090 new_status = DID_ABORT;
2091 break;
2092 case CAM_BUSY:
2093 new_status = DID_BUS_BUSY;
2094 break;
2095 case CAM_REQ_INVALID:
2096 case CAM_PATH_INVALID:
2097 new_status = DID_BAD_TARGET;
2098 break;
2099 case CAM_SEL_TIMEOUT:
2100 new_status = DID_NO_CONNECT;
2101 break;
2102 case CAM_SCSI_BUS_RESET:
2103 case CAM_BDR_SENT:
2104 new_status = DID_RESET;
2105 break;
2106 case CAM_UNCOR_PARITY:
2107 new_status = DID_PARITY;
2108 do_fallback = 1;
2109 break;
2110 case CAM_CMD_TIMEOUT:
2111 new_status = DID_TIME_OUT;
2112 do_fallback = 1;
2113 break;
2114 case CAM_REQ_CMP_ERR:
2115 case CAM_UNEXP_BUSFREE:
2116 case CAM_DATA_RUN_ERR:
2117 new_status = DID_ERROR;
2118 do_fallback = 1;
2119 break;
2120 case CAM_UA_ABORT:
2121 case CAM_NO_HBA:
2122 case CAM_SEQUENCE_FAIL:
2123 case CAM_CCB_LEN_ERR:
2124 case CAM_PROVIDE_FAIL:
2125 case CAM_REQ_TERMIO:
2126 case CAM_UNREC_HBA_ERROR:
2127 case CAM_REQ_TOO_BIG:
2128 new_status = DID_ERROR;
2129 break;
2130 case CAM_REQUEUE_REQ:
2131 new_status = DID_REQUEUE;
2132 break;
2133 default:
2134 /* We should never get here */
2135 new_status = DID_ERROR;
2136 break;
2137 }
2138
2139 if (do_fallback) {
2140 printf("%s: device overrun (status %x) on %d:%d:%d\n",
2141 ahd_name(ahd), status, cmd->device->channel,
2142 cmd->device->id, cmd->device->lun);
2143 }
2144
2145 ahd_cmd_set_transaction_status(cmd, new_status);
2146
2147 cmd->scsi_done(cmd);
2148 }
2149
2150 static void
2151 ahd_freeze_simq(struct ahd_softc *ahd)
2152 {
2153 scsi_block_requests(ahd->platform_data->host);
2154 }
2155
2156 static void
2157 ahd_release_simq(struct ahd_softc *ahd)
2158 {
2159 scsi_unblock_requests(ahd->platform_data->host);
2160 }
2161
2162 static int
2163 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2164 {
2165 struct ahd_softc *ahd;
2166 struct ahd_linux_device *dev;
2167 struct scb *pending_scb;
2168 u_int saved_scbptr;
2169 u_int active_scbptr;
2170 u_int last_phase;
2171 u_int saved_scsiid;
2172 u_int cdb_byte;
2173 int retval;
2174 int was_paused;
2175 int paused;
2176 int wait;
2177 int disconnected;
2178 ahd_mode_state saved_modes;
2179 unsigned long flags;
2180
2181 pending_scb = NULL;
2182 paused = FALSE;
2183 wait = FALSE;
2184 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2185
2186 scmd_printk(KERN_INFO, cmd,
2187 "Attempting to queue an ABORT message:");
2188
2189 printf("CDB:");
2190 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2191 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2192 printf("\n");
2193
2194 ahd_lock(ahd, &flags);
2195
2196 /*
2197 * First determine if we currently own this command.
2198 * Start by searching the device queue. If not found
2199 * there, check the pending_scb list. If not found
2200 * at all, and the system wanted us to just abort the
2201 * command, return success.
2202 */
2203 dev = scsi_transport_device_data(cmd->device);
2204
2205 if (dev == NULL) {
2206 /*
2207 * No target device for this command exists,
2208 * so we must not still own the command.
2209 */
2210 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2211 retval = SUCCESS;
2212 goto no_cmd;
2213 }
2214
2215 /*
2216 * See if we can find a matching cmd in the pending list.
2217 */
2218 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2219 if (pending_scb->io_ctx == cmd)
2220 break;
2221 }
2222
2223 if (pending_scb == NULL) {
2224 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2225 goto no_cmd;
2226 }
2227
2228 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2229 /*
2230 * We can't queue two recovery actions using the same SCB
2231 */
2232 retval = FAILED;
2233 goto done;
2234 }
2235
2236 /*
2237 * Ensure that the card doesn't do anything
2238 * behind our back. Also make sure that we
2239 * didn't "just" miss an interrupt that would
2240 * affect this cmd.
2241 */
2242 was_paused = ahd_is_paused(ahd);
2243 ahd_pause_and_flushwork(ahd);
2244 paused = TRUE;
2245
2246 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2247 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2248 goto no_cmd;
2249 }
2250
2251 printf("%s: At time of recovery, card was %spaused\n",
2252 ahd_name(ahd), was_paused ? "" : "not ");
2253 ahd_dump_card_state(ahd);
2254
2255 disconnected = TRUE;
2256 if (ahd_search_qinfifo(ahd, cmd->device->id,
2257 cmd->device->channel + 'A',
2258 cmd->device->lun,
2259 pending_scb->hscb->tag,
2260 ROLE_INITIATOR, CAM_REQ_ABORTED,
2261 SEARCH_COMPLETE) > 0) {
2262 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2263 ahd_name(ahd), cmd->device->channel,
2264 cmd->device->id, cmd->device->lun);
2265 retval = SUCCESS;
2266 goto done;
2267 }
2268
2269 saved_modes = ahd_save_modes(ahd);
2270 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2271 last_phase = ahd_inb(ahd, LASTPHASE);
2272 saved_scbptr = ahd_get_scbptr(ahd);
2273 active_scbptr = saved_scbptr;
2274 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2275 struct scb *bus_scb;
2276
2277 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2278 if (bus_scb == pending_scb)
2279 disconnected = FALSE;
2280 }
2281
2282 /*
2283 * At this point, pending_scb is the scb associated with the
2284 * passed in command. That command is currently active on the
2285 * bus or is in the disconnected state.
2286 */
2287 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2288 if (last_phase != P_BUSFREE
2289 && SCB_GET_TAG(pending_scb) == active_scbptr) {
2290
2291 /*
2292 * We're active on the bus, so assert ATN
2293 * and hope that the target responds.
2294 */
2295 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2296 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2297 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2298 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2299 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2300 wait = TRUE;
2301 } else if (disconnected) {
2302
2303 /*
2304 * Actually re-queue this SCB in an attempt
2305 * to select the device before it reconnects.
2306 */
2307 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2308 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2309 pending_scb->hscb->cdb_len = 0;
2310 pending_scb->hscb->task_attribute = 0;
2311 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2312
2313 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2314 /*
2315 * Mark the SCB has having an outstanding
2316 * task management function. Should the command
2317 * complete normally before the task management
2318 * function can be sent, the host will be notified
2319 * to abort our requeued SCB.
2320 */
2321 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2322 pending_scb->hscb->task_management);
2323 } else {
2324 /*
2325 * If non-packetized, set the MK_MESSAGE control
2326 * bit indicating that we desire to send a message.
2327 * We also set the disconnected flag since there is
2328 * no guarantee that our SCB control byte matches
2329 * the version on the card. We don't want the
2330 * sequencer to abort the command thinking an
2331 * unsolicited reselection occurred.
2332 */
2333 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2334
2335 /*
2336 * The sequencer will never re-reference the
2337 * in-core SCB. To make sure we are notified
2338 * during reslection, set the MK_MESSAGE flag in
2339 * the card's copy of the SCB.
2340 */
2341 ahd_outb(ahd, SCB_CONTROL,
2342 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2343 }
2344
2345 /*
2346 * Clear out any entries in the QINFIFO first
2347 * so we are the next SCB for this target
2348 * to run.
2349 */
2350 ahd_search_qinfifo(ahd, cmd->device->id,
2351 cmd->device->channel + 'A', cmd->device->lun,
2352 SCB_LIST_NULL, ROLE_INITIATOR,
2353 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2354 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2355 ahd_set_scbptr(ahd, saved_scbptr);
2356 ahd_print_path(ahd, pending_scb);
2357 printf("Device is disconnected, re-queuing SCB\n");
2358 wait = TRUE;
2359 } else {
2360 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2361 retval = FAILED;
2362 goto done;
2363 }
2364
2365 no_cmd:
2366 /*
2367 * Our assumption is that if we don't have the command, no
2368 * recovery action was required, so we return success. Again,
2369 * the semantics of the mid-layer recovery engine are not
2370 * well defined, so this may change in time.
2371 */
2372 retval = SUCCESS;
2373 done:
2374 if (paused)
2375 ahd_unpause(ahd);
2376 if (wait) {
2377 DECLARE_COMPLETION_ONSTACK(done);
2378
2379 ahd->platform_data->eh_done = &done;
2380 ahd_unlock(ahd, &flags);
2381
2382 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
2383 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2384 ahd_lock(ahd, &flags);
2385 ahd->platform_data->eh_done = NULL;
2386 ahd_unlock(ahd, &flags);
2387 printf("%s: Timer Expired (active %d)\n",
2388 ahd_name(ahd), dev->active);
2389 retval = FAILED;
2390 }
2391 printf("Recovery code awake\n");
2392 } else
2393 ahd_unlock(ahd, &flags);
2394
2395 if (retval != SUCCESS)
2396 printf("%s: Command abort returning 0x%x\n",
2397 ahd_name(ahd), retval);
2398
2399 return retval;
2400 }
2401
2402 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2403 {
2404 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2405 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2406 struct ahd_devinfo devinfo;
2407 unsigned long flags;
2408
2409 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2410 starget->channel + 'A', ROLE_INITIATOR);
2411 ahd_lock(ahd, &flags);
2412 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2413 ahd_unlock(ahd, &flags);
2414 }
2415
2416 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2417 {
2418 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2419 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2420 struct ahd_tmode_tstate *tstate;
2421 struct ahd_initiator_tinfo *tinfo
2422 = ahd_fetch_transinfo(ahd,
2423 starget->channel + 'A',
2424 shost->this_id, starget->id, &tstate);
2425 struct ahd_devinfo devinfo;
2426 unsigned int ppr_options = tinfo->goal.ppr_options;
2427 unsigned int dt;
2428 unsigned long flags;
2429 unsigned long offset = tinfo->goal.offset;
2430
2431 #ifdef AHD_DEBUG
2432 if ((ahd_debug & AHD_SHOW_DV) != 0)
2433 printf("%s: set period to %d\n", ahd_name(ahd), period);
2434 #endif
2435 if (offset == 0)
2436 offset = MAX_OFFSET;
2437
2438 if (period < 8)
2439 period = 8;
2440 if (period < 10) {
2441 if (spi_max_width(starget)) {
2442 ppr_options |= MSG_EXT_PPR_DT_REQ;
2443 if (period == 8)
2444 ppr_options |= MSG_EXT_PPR_IU_REQ;
2445 } else
2446 period = 10;
2447 }
2448
2449 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2450
2451 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2452 starget->channel + 'A', ROLE_INITIATOR);
2453
2454 /* all PPR requests apart from QAS require wide transfers */
2455 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2456 if (spi_width(starget) == 0)
2457 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2458 }
2459
2460 ahd_find_syncrate(ahd, &period, &ppr_options,
2461 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2462
2463 ahd_lock(ahd, &flags);
2464 ahd_set_syncrate(ahd, &devinfo, period, offset,
2465 ppr_options, AHD_TRANS_GOAL, FALSE);
2466 ahd_unlock(ahd, &flags);
2467 }
2468
2469 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2470 {
2471 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2472 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2473 struct ahd_tmode_tstate *tstate;
2474 struct ahd_initiator_tinfo *tinfo
2475 = ahd_fetch_transinfo(ahd,
2476 starget->channel + 'A',
2477 shost->this_id, starget->id, &tstate);
2478 struct ahd_devinfo devinfo;
2479 unsigned int ppr_options = 0;
2480 unsigned int period = 0;
2481 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2482 unsigned long flags;
2483
2484 #ifdef AHD_DEBUG
2485 if ((ahd_debug & AHD_SHOW_DV) != 0)
2486 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2487 #endif
2488
2489 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2490 starget->channel + 'A', ROLE_INITIATOR);
2491 if (offset != 0) {
2492 period = tinfo->goal.period;
2493 ppr_options = tinfo->goal.ppr_options;
2494 ahd_find_syncrate(ahd, &period, &ppr_options,
2495 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2496 }
2497
2498 ahd_lock(ahd, &flags);
2499 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2500 AHD_TRANS_GOAL, FALSE);
2501 ahd_unlock(ahd, &flags);
2502 }
2503
2504 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2505 {
2506 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2507 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2508 struct ahd_tmode_tstate *tstate;
2509 struct ahd_initiator_tinfo *tinfo
2510 = ahd_fetch_transinfo(ahd,
2511 starget->channel + 'A',
2512 shost->this_id, starget->id, &tstate);
2513 struct ahd_devinfo devinfo;
2514 unsigned int ppr_options = tinfo->goal.ppr_options
2515 & ~MSG_EXT_PPR_DT_REQ;
2516 unsigned int period = tinfo->goal.period;
2517 unsigned int width = tinfo->goal.width;
2518 unsigned long flags;
2519
2520 #ifdef AHD_DEBUG
2521 if ((ahd_debug & AHD_SHOW_DV) != 0)
2522 printf("%s: %s DT\n", ahd_name(ahd),
2523 dt ? "enabling" : "disabling");
2524 #endif
2525 if (dt && spi_max_width(starget)) {
2526 ppr_options |= MSG_EXT_PPR_DT_REQ;
2527 if (!width)
2528 ahd_linux_set_width(starget, 1);
2529 } else {
2530 if (period <= 9)
2531 period = 10; /* If resetting DT, period must be >= 25ns */
2532 /* IU is invalid without DT set */
2533 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2534 }
2535 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2536 starget->channel + 'A', ROLE_INITIATOR);
2537 ahd_find_syncrate(ahd, &period, &ppr_options,
2538 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2539
2540 ahd_lock(ahd, &flags);
2541 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2542 ppr_options, AHD_TRANS_GOAL, FALSE);
2543 ahd_unlock(ahd, &flags);
2544 }
2545
2546 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2547 {
2548 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2549 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2550 struct ahd_tmode_tstate *tstate;
2551 struct ahd_initiator_tinfo *tinfo
2552 = ahd_fetch_transinfo(ahd,
2553 starget->channel + 'A',
2554 shost->this_id, starget->id, &tstate);
2555 struct ahd_devinfo devinfo;
2556 unsigned int ppr_options = tinfo->goal.ppr_options
2557 & ~MSG_EXT_PPR_QAS_REQ;
2558 unsigned int period = tinfo->goal.period;
2559 unsigned int dt;
2560 unsigned long flags;
2561
2562 #ifdef AHD_DEBUG
2563 if ((ahd_debug & AHD_SHOW_DV) != 0)
2564 printf("%s: %s QAS\n", ahd_name(ahd),
2565 qas ? "enabling" : "disabling");
2566 #endif
2567
2568 if (qas) {
2569 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2570 }
2571
2572 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2573
2574 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2575 starget->channel + 'A', ROLE_INITIATOR);
2576 ahd_find_syncrate(ahd, &period, &ppr_options,
2577 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2578
2579 ahd_lock(ahd, &flags);
2580 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2581 ppr_options, AHD_TRANS_GOAL, FALSE);
2582 ahd_unlock(ahd, &flags);
2583 }
2584
2585 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2586 {
2587 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2588 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2589 struct ahd_tmode_tstate *tstate;
2590 struct ahd_initiator_tinfo *tinfo
2591 = ahd_fetch_transinfo(ahd,
2592 starget->channel + 'A',
2593 shost->this_id, starget->id, &tstate);
2594 struct ahd_devinfo devinfo;
2595 unsigned int ppr_options = tinfo->goal.ppr_options
2596 & ~MSG_EXT_PPR_IU_REQ;
2597 unsigned int period = tinfo->goal.period;
2598 unsigned int dt;
2599 unsigned long flags;
2600
2601 #ifdef AHD_DEBUG
2602 if ((ahd_debug & AHD_SHOW_DV) != 0)
2603 printf("%s: %s IU\n", ahd_name(ahd),
2604 iu ? "enabling" : "disabling");
2605 #endif
2606
2607 if (iu && spi_max_width(starget)) {
2608 ppr_options |= MSG_EXT_PPR_IU_REQ;
2609 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2610 }
2611
2612 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2613
2614 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2615 starget->channel + 'A', ROLE_INITIATOR);
2616 ahd_find_syncrate(ahd, &period, &ppr_options,
2617 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2618
2619 ahd_lock(ahd, &flags);
2620 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2621 ppr_options, AHD_TRANS_GOAL, FALSE);
2622 ahd_unlock(ahd, &flags);
2623 }
2624
2625 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2626 {
2627 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2628 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2629 struct ahd_tmode_tstate *tstate;
2630 struct ahd_initiator_tinfo *tinfo
2631 = ahd_fetch_transinfo(ahd,
2632 starget->channel + 'A',
2633 shost->this_id, starget->id, &tstate);
2634 struct ahd_devinfo devinfo;
2635 unsigned int ppr_options = tinfo->goal.ppr_options
2636 & ~MSG_EXT_PPR_RD_STRM;
2637 unsigned int period = tinfo->goal.period;
2638 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2639 unsigned long flags;
2640
2641 #ifdef AHD_DEBUG
2642 if ((ahd_debug & AHD_SHOW_DV) != 0)
2643 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2644 rdstrm ? "enabling" : "disabling");
2645 #endif
2646
2647 if (rdstrm && spi_max_width(starget))
2648 ppr_options |= MSG_EXT_PPR_RD_STRM;
2649
2650 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2651 starget->channel + 'A', ROLE_INITIATOR);
2652 ahd_find_syncrate(ahd, &period, &ppr_options,
2653 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2654
2655 ahd_lock(ahd, &flags);
2656 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2657 ppr_options, AHD_TRANS_GOAL, FALSE);
2658 ahd_unlock(ahd, &flags);
2659 }
2660
2661 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2662 {
2663 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2664 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2665 struct ahd_tmode_tstate *tstate;
2666 struct ahd_initiator_tinfo *tinfo
2667 = ahd_fetch_transinfo(ahd,
2668 starget->channel + 'A',
2669 shost->this_id, starget->id, &tstate);
2670 struct ahd_devinfo devinfo;
2671 unsigned int ppr_options = tinfo->goal.ppr_options
2672 & ~MSG_EXT_PPR_WR_FLOW;
2673 unsigned int period = tinfo->goal.period;
2674 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2675 unsigned long flags;
2676
2677 #ifdef AHD_DEBUG
2678 if ((ahd_debug & AHD_SHOW_DV) != 0)
2679 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2680 wrflow ? "enabling" : "disabling");
2681 #endif
2682
2683 if (wrflow && spi_max_width(starget))
2684 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2685
2686 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2687 starget->channel + 'A', ROLE_INITIATOR);
2688 ahd_find_syncrate(ahd, &period, &ppr_options,
2689 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2690
2691 ahd_lock(ahd, &flags);
2692 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2693 ppr_options, AHD_TRANS_GOAL, FALSE);
2694 ahd_unlock(ahd, &flags);
2695 }
2696
2697 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2698 {
2699 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2700 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2701 struct ahd_tmode_tstate *tstate;
2702 struct ahd_initiator_tinfo *tinfo
2703 = ahd_fetch_transinfo(ahd,
2704 starget->channel + 'A',
2705 shost->this_id, starget->id, &tstate);
2706 struct ahd_devinfo devinfo;
2707 unsigned int ppr_options = tinfo->goal.ppr_options
2708 & ~MSG_EXT_PPR_RTI;
2709 unsigned int period = tinfo->goal.period;
2710 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2711 unsigned long flags;
2712
2713 if ((ahd->features & AHD_RTI) == 0) {
2714 #ifdef AHD_DEBUG
2715 if ((ahd_debug & AHD_SHOW_DV) != 0)
2716 printf("%s: RTI not available\n", ahd_name(ahd));
2717 #endif
2718 return;
2719 }
2720
2721 #ifdef AHD_DEBUG
2722 if ((ahd_debug & AHD_SHOW_DV) != 0)
2723 printf("%s: %s RTI\n", ahd_name(ahd),
2724 rti ? "enabling" : "disabling");
2725 #endif
2726
2727 if (rti && spi_max_width(starget))
2728 ppr_options |= MSG_EXT_PPR_RTI;
2729
2730 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2731 starget->channel + 'A', ROLE_INITIATOR);
2732 ahd_find_syncrate(ahd, &period, &ppr_options,
2733 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2734
2735 ahd_lock(ahd, &flags);
2736 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2737 ppr_options, AHD_TRANS_GOAL, FALSE);
2738 ahd_unlock(ahd, &flags);
2739 }
2740
2741 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2742 {
2743 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2744 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2745 struct ahd_tmode_tstate *tstate;
2746 struct ahd_initiator_tinfo *tinfo
2747 = ahd_fetch_transinfo(ahd,
2748 starget->channel + 'A',
2749 shost->this_id, starget->id, &tstate);
2750 struct ahd_devinfo devinfo;
2751 unsigned int ppr_options = tinfo->goal.ppr_options
2752 & ~MSG_EXT_PPR_PCOMP_EN;
2753 unsigned int period = tinfo->goal.period;
2754 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2755 unsigned long flags;
2756
2757 #ifdef AHD_DEBUG
2758 if ((ahd_debug & AHD_SHOW_DV) != 0)
2759 printf("%s: %s Precompensation\n", ahd_name(ahd),
2760 pcomp ? "Enable" : "Disable");
2761 #endif
2762
2763 if (pcomp && spi_max_width(starget)) {
2764 uint8_t precomp;
2765
2766 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2767 const struct ahd_linux_iocell_opts *iocell_opts;
2768
2769 iocell_opts = &aic79xx_iocell_info[ahd->unit];
2770 precomp = iocell_opts->precomp;
2771 } else {
2772 precomp = AIC79XX_DEFAULT_PRECOMP;
2773 }
2774 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2775 AHD_SET_PRECOMP(ahd, precomp);
2776 } else {
2777 AHD_SET_PRECOMP(ahd, 0);
2778 }
2779
2780 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2781 starget->channel + 'A', ROLE_INITIATOR);
2782 ahd_find_syncrate(ahd, &period, &ppr_options,
2783 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2784
2785 ahd_lock(ahd, &flags);
2786 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2787 ppr_options, AHD_TRANS_GOAL, FALSE);
2788 ahd_unlock(ahd, &flags);
2789 }
2790
2791 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2792 {
2793 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2794 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2795 struct ahd_tmode_tstate *tstate;
2796 struct ahd_initiator_tinfo *tinfo
2797 = ahd_fetch_transinfo(ahd,
2798 starget->channel + 'A',
2799 shost->this_id, starget->id, &tstate);
2800 struct ahd_devinfo devinfo;
2801 unsigned int ppr_options = tinfo->goal.ppr_options
2802 & ~MSG_EXT_PPR_HOLD_MCS;
2803 unsigned int period = tinfo->goal.period;
2804 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2805 unsigned long flags;
2806
2807 if (hold && spi_max_width(starget))
2808 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2809
2810 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2811 starget->channel + 'A', ROLE_INITIATOR);
2812 ahd_find_syncrate(ahd, &period, &ppr_options,
2813 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2814
2815 ahd_lock(ahd, &flags);
2816 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2817 ppr_options, AHD_TRANS_GOAL, FALSE);
2818 ahd_unlock(ahd, &flags);
2819 }
2820
2821 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2822 {
2823 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2824 unsigned long flags;
2825 u8 mode;
2826
2827 ahd_lock(ahd, &flags);
2828 ahd_pause(ahd);
2829 mode = ahd_inb(ahd, SBLKCTL);
2830 ahd_unpause(ahd);
2831 ahd_unlock(ahd, &flags);
2832
2833 if (mode & ENAB40)
2834 spi_signalling(shost) = SPI_SIGNAL_LVD;
2835 else if (mode & ENAB20)
2836 spi_signalling(shost) = SPI_SIGNAL_SE;
2837 else
2838 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2839 }
2840
2841 static struct spi_function_template ahd_linux_transport_functions = {
2842 .set_offset = ahd_linux_set_offset,
2843 .show_offset = 1,
2844 .set_period = ahd_linux_set_period,
2845 .show_period = 1,
2846 .set_width = ahd_linux_set_width,
2847 .show_width = 1,
2848 .set_dt = ahd_linux_set_dt,
2849 .show_dt = 1,
2850 .set_iu = ahd_linux_set_iu,
2851 .show_iu = 1,
2852 .set_qas = ahd_linux_set_qas,
2853 .show_qas = 1,
2854 .set_rd_strm = ahd_linux_set_rd_strm,
2855 .show_rd_strm = 1,
2856 .set_wr_flow = ahd_linux_set_wr_flow,
2857 .show_wr_flow = 1,
2858 .set_rti = ahd_linux_set_rti,
2859 .show_rti = 1,
2860 .set_pcomp_en = ahd_linux_set_pcomp_en,
2861 .show_pcomp_en = 1,
2862 .set_hold_mcs = ahd_linux_set_hold_mcs,
2863 .show_hold_mcs = 1,
2864 .get_signalling = ahd_linux_get_signalling,
2865 };
2866
2867 static int __init
2868 ahd_linux_init(void)
2869 {
2870 int error = 0;
2871
2872 /*
2873 * If we've been passed any parameters, process them now.
2874 */
2875 if (aic79xx)
2876 aic79xx_setup(aic79xx);
2877
2878 ahd_linux_transport_template =
2879 spi_attach_transport(&ahd_linux_transport_functions);
2880 if (!ahd_linux_transport_template)
2881 return -ENODEV;
2882
2883 scsi_transport_reserve_device(ahd_linux_transport_template,
2884 sizeof(struct ahd_linux_device));
2885
2886 error = ahd_linux_pci_init();
2887 if (error)
2888 spi_release_transport(ahd_linux_transport_template);
2889 return error;
2890 }
2891
2892 static void __exit
2893 ahd_linux_exit(void)
2894 {
2895 ahd_linux_pci_exit();
2896 spi_release_transport(ahd_linux_transport_template);
2897 }
2898
2899 module_init(ahd_linux_init);
2900 module_exit(ahd_linux_exit);
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