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Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / drivers / scsi / aic7xxx / aic79xx_osm.c
blob7d48700257a7aff109850ea641379779ebe17b0b
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 #include <linux/slab.h>
57
58 /*
59 * Bucket size for counting good commands in between bad ones.
60 */
61 #define AHD_LINUX_ERR_THRESH 1000
62
63 /*
64 * Set this to the delay in seconds after SCSI bus reset.
65 * Note, we honor this only for the initial bus reset.
66 * The scsi error recovery code performs its own bus settle
67 * delay handling for error recovery actions.
68 */
69 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS
70 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
71 #else
72 #define AIC79XX_RESET_DELAY 5000
73 #endif
74
75 /*
76 * To change the default number of tagged transactions allowed per-device,
77 * add a line to the lilo.conf file like:
78 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
79 * which will result in the first four devices on the first two
80 * controllers being set to a tagged queue depth of 32.
81 *
82 * The tag_commands is an array of 16 to allow for wide and twin adapters.
83 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
84 * for channel 1.
85 */
86 typedef struct {
87 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */
88 } adapter_tag_info_t;
89
90 /*
91 * Modify this as you see fit for your system.
92 *
93 * 0 tagged queuing disabled
94 * 1 <= n <= 253 n == max tags ever dispatched.
95 *
96 * The driver will throttle the number of commands dispatched to a
97 * device if it returns queue full. For devices with a fixed maximum
98 * queue depth, the driver will eventually determine this depth and
99 * lock it in (a console message is printed to indicate that a lock
100 * has occurred). On some devices, queue full is returned for a temporary
101 * resource shortage. These devices will return queue full at varying
102 * depths. The driver will throttle back when the queue fulls occur and
103 * attempt to slowly increase the depth over time as the device recovers
104 * from the resource shortage.
105 *
106 * In this example, the first line will disable tagged queueing for all
107 * the devices on the first probed aic79xx adapter.
108 *
109 * The second line enables tagged queueing with 4 commands/LUN for IDs
110 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
111 * driver to attempt to use up to 64 tags for ID 1.
112 *
113 * The third line is the same as the first line.
114 *
115 * The fourth line disables tagged queueing for devices 0 and 3. It
116 * enables tagged queueing for the other IDs, with 16 commands/LUN
117 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
118 * IDs 2, 5-7, and 9-15.
119 */
120
121 /*
122 * NOTE: The below structure is for reference only, the actual structure
123 * to modify in order to change things is just below this comment block.
124 adapter_tag_info_t aic79xx_tag_info[] =
125 {
126 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
127 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
128 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
129 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
130 };
131 */
132
133 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
134 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
135 #else
136 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
137 #endif
138
139 #define AIC79XX_CONFIGED_TAG_COMMANDS { \
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 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \
148 }
149
150 /*
151 * By default, use the number of commands specified by
152 * the users kernel configuration.
153 */
154 static adapter_tag_info_t aic79xx_tag_info[] =
155 {
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 {AIC79XX_CONFIGED_TAG_COMMANDS}
172 };
173
174 /*
175 * The I/O cell on the chip is very configurable in respect to its analog
176 * characteristics. Set the defaults here; they can be overriden with
177 * the proper insmod parameters.
178 */
179 struct ahd_linux_iocell_opts
180 {
181 uint8_t precomp;
182 uint8_t slewrate;
183 uint8_t amplitude;
184 };
185 #define AIC79XX_DEFAULT_PRECOMP 0xFF
186 #define AIC79XX_DEFAULT_SLEWRATE 0xFF
187 #define AIC79XX_DEFAULT_AMPLITUDE 0xFF
188 #define AIC79XX_DEFAULT_IOOPTS \
189 { \
190 AIC79XX_DEFAULT_PRECOMP, \
191 AIC79XX_DEFAULT_SLEWRATE, \
192 AIC79XX_DEFAULT_AMPLITUDE \
193 }
194 #define AIC79XX_PRECOMP_INDEX 0
195 #define AIC79XX_SLEWRATE_INDEX 1
196 #define AIC79XX_AMPLITUDE_INDEX 2
197 static const struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
198 {
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 AIC79XX_DEFAULT_IOOPTS
215 };
216
217 /*
218 * There should be a specific return value for this in scsi.h, but
219 * it seems that most drivers ignore it.
220 */
221 #define DID_UNDERFLOW DID_ERROR
222
223 void
224 ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
225 {
226 printk("(scsi%d:%c:%d:%d): ",
227 ahd->platform_data->host->host_no,
228 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
229 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
230 scb != NULL ? SCB_GET_LUN(scb) : -1);
231 }
232
233 /*
234 * XXX - these options apply unilaterally to _all_ adapters
235 * cards in the system. This should be fixed. Exceptions to this
236 * rule are noted in the comments.
237 */
238
239 /*
240 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
241 * has no effect on any later resets that might occur due to things like
242 * SCSI bus timeouts.
243 */
244 static uint32_t aic79xx_no_reset;
245
246 /*
247 * Should we force EXTENDED translation on a controller.
248 * 0 == Use whatever is in the SEEPROM or default to off
249 * 1 == Use whatever is in the SEEPROM or default to on
250 */
251 static uint32_t aic79xx_extended;
252
253 /*
254 * PCI bus parity checking of the Adaptec controllers. This is somewhat
255 * dubious at best. To my knowledge, this option has never actually
256 * solved a PCI parity problem, but on certain machines with broken PCI
257 * chipset configurations, it can generate tons of false error messages.
258 * It's included in the driver for completeness.
259 * 0 = Shut off PCI parity check
260 * non-0 = Enable PCI parity check
261 *
262 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
263 * variable to -1 you would actually want to simply pass the variable
264 * name without a number. That will invert the 0 which will result in
265 * -1.
266 */
267 static uint32_t aic79xx_pci_parity = ~0;
268
269 /*
270 * There are lots of broken chipsets in the world. Some of them will
271 * violate the PCI spec when we issue byte sized memory writes to our
272 * controller. I/O mapped register access, if allowed by the given
273 * platform, will work in almost all cases.
274 */
275 uint32_t aic79xx_allow_memio = ~0;
276
277 /*
278 * So that we can set how long each device is given as a selection timeout.
279 * The table of values goes like this:
280 * 0 - 256ms
281 * 1 - 128ms
282 * 2 - 64ms
283 * 3 - 32ms
284 * We default to 256ms because some older devices need a longer time
285 * to respond to initial selection.
286 */
287 static uint32_t aic79xx_seltime;
288
289 /*
290 * Certain devices do not perform any aging on commands. Should the
291 * device be saturated by commands in one portion of the disk, it is
292 * possible for transactions on far away sectors to never be serviced.
293 * To handle these devices, we can periodically send an ordered tag to
294 * force all outstanding transactions to be serviced prior to a new
295 * transaction.
296 */
297 static uint32_t aic79xx_periodic_otag;
298
299 /* Some storage boxes are using an LSI chip which has a bug making it
300 * impossible to use aic79xx Rev B chip in 320 speeds. The following
301 * storage boxes have been reported to be buggy:
302 * EonStor 3U 16-Bay: U16U-G3A3
303 * EonStor 2U 12-Bay: U12U-G3A3
304 * SentinelRAID: 2500F R5 / R6
305 * SentinelRAID: 2500F R1
306 * SentinelRAID: 2500F/1500F
307 * SentinelRAID: 150F
308 *
309 * To get around this LSI bug, you can set your board to 160 mode
310 * or you can enable the SLOWCRC bit.
311 */
312 uint32_t aic79xx_slowcrc;
313
314 /*
315 * Module information and settable options.
316 */
317 static char *aic79xx = NULL;
318
319 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
320 MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver");
321 MODULE_LICENSE("Dual BSD/GPL");
322 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
323 module_param(aic79xx, charp, 0444);
324 MODULE_PARM_DESC(aic79xx,
325 "period-delimited options string:\n"
326 " verbose Enable verbose/diagnostic logging\n"
327 " allow_memio Allow device registers to be memory mapped\n"
328 " debug Bitmask of debug values to enable\n"
329 " no_reset Suppress initial bus resets\n"
330 " extended Enable extended geometry on all controllers\n"
331 " periodic_otag Send an ordered tagged transaction\n"
332 " periodically to prevent tag starvation.\n"
333 " This may be required by some older disk\n"
334 " or drives/RAID arrays.\n"
335 " tag_info:<tag_str> Set per-target tag depth\n"
336 " global_tag_depth:<int> Global tag depth for all targets on all buses\n"
337 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
338 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
339 " amplitude:<int> Set the signal amplitude (0-7).\n"
340 " seltime:<int> Selection Timeout:\n"
341 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
342 " slowcrc Turn on the SLOWCRC bit (Rev B only)\n"
343 "\n"
344 " Sample /etc/modprobe.conf line:\n"
345 " Enable verbose logging\n"
346 " Set tag depth on Controller 2/Target 2 to 10 tags\n"
347 " Shorten the selection timeout to 128ms\n"
348 "\n"
349 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
350 );
351
352 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
353 struct scsi_device *,
354 struct scb *);
355 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
356 struct scsi_cmnd *cmd);
357 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
358 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
359 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
360 struct ahd_devinfo *devinfo);
361 static void ahd_linux_device_queue_depth(struct scsi_device *);
362 static int ahd_linux_run_command(struct ahd_softc*,
363 struct ahd_linux_device *,
364 struct scsi_cmnd *);
365 static void ahd_linux_setup_tag_info_global(char *p);
366 static int aic79xx_setup(char *c);
367 static void ahd_freeze_simq(struct ahd_softc *ahd);
368 static void ahd_release_simq(struct ahd_softc *ahd);
369
370 static int ahd_linux_unit;
371
372
373 /************************** OS Utility Wrappers *******************************/
374 void ahd_delay(long);
375 void
376 ahd_delay(long usec)
377 {
378 /*
379 * udelay on Linux can have problems for
380 * multi-millisecond waits. Wait at most
381 * 1024us per call.
382 */
383 while (usec > 0) {
384 udelay(usec % 1024);
385 usec -= 1024;
386 }
387 }
388
389
390 /***************************** Low Level I/O **********************************/
391 uint8_t ahd_inb(struct ahd_softc * ahd, long port);
392 void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
393 void ahd_outw_atomic(struct ahd_softc * ahd,
394 long port, uint16_t val);
395 void ahd_outsb(struct ahd_softc * ahd, long port,
396 uint8_t *, int count);
397 void ahd_insb(struct ahd_softc * ahd, long port,
398 uint8_t *, int count);
399
400 uint8_t
401 ahd_inb(struct ahd_softc * ahd, long port)
402 {
403 uint8_t x;
404
405 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
406 x = readb(ahd->bshs[0].maddr + port);
407 } else {
408 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
409 }
410 mb();
411 return (x);
412 }
413
414 #if 0 /* unused */
415 static uint16_t
416 ahd_inw_atomic(struct ahd_softc * ahd, long port)
417 {
418 uint8_t x;
419
420 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
421 x = readw(ahd->bshs[0].maddr + port);
422 } else {
423 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
424 }
425 mb();
426 return (x);
427 }
428 #endif
429
430 void
431 ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)
432 {
433 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
434 writeb(val, ahd->bshs[0].maddr + port);
435 } else {
436 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
437 }
438 mb();
439 }
440
441 void
442 ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)
443 {
444 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
445 writew(val, ahd->bshs[0].maddr + port);
446 } else {
447 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
448 }
449 mb();
450 }
451
452 void
453 ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
454 {
455 int i;
456
457 /*
458 * There is probably a more efficient way to do this on Linux
459 * but we don't use this for anything speed critical and this
460 * should work.
461 */
462 for (i = 0; i < count; i++)
463 ahd_outb(ahd, port, *array++);
464 }
465
466 void
467 ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
468 {
469 int i;
470
471 /*
472 * There is probably a more efficient way to do this on Linux
473 * but we don't use this for anything speed critical and this
474 * should work.
475 */
476 for (i = 0; i < count; i++)
477 *array++ = ahd_inb(ahd, port);
478 }
479
480 /******************************* PCI Routines *********************************/
481 uint32_t
482 ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)
483 {
484 switch (width) {
485 case 1:
486 {
487 uint8_t retval;
488
489 pci_read_config_byte(pci, reg, &retval);
490 return (retval);
491 }
492 case 2:
493 {
494 uint16_t retval;
495 pci_read_config_word(pci, reg, &retval);
496 return (retval);
497 }
498 case 4:
499 {
500 uint32_t retval;
501 pci_read_config_dword(pci, reg, &retval);
502 return (retval);
503 }
504 default:
505 panic("ahd_pci_read_config: Read size too big");
506 /* NOTREACHED */
507 return (0);
508 }
509 }
510
511 void
512 ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)
513 {
514 switch (width) {
515 case 1:
516 pci_write_config_byte(pci, reg, value);
517 break;
518 case 2:
519 pci_write_config_word(pci, reg, value);
520 break;
521 case 4:
522 pci_write_config_dword(pci, reg, value);
523 break;
524 default:
525 panic("ahd_pci_write_config: Write size too big");
526 /* NOTREACHED */
527 }
528 }
529
530 /****************************** Inlines ***************************************/
531 static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
532
533 static void
534 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
535 {
536 struct scsi_cmnd *cmd;
537
538 cmd = scb->io_ctx;
539 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
540 scsi_dma_unmap(cmd);
541 }
542
543 /******************************** Macros **************************************/
544 #define BUILD_SCSIID(ahd, cmd) \
545 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
546
547 /*
548 * Return a string describing the driver.
549 */
550 static const char *
551 ahd_linux_info(struct Scsi_Host *host)
552 {
553 static char buffer[512];
554 char ahd_info[256];
555 char *bp;
556 struct ahd_softc *ahd;
557
558 bp = &buffer[0];
559 ahd = *(struct ahd_softc **)host->hostdata;
560 memset(bp, 0, sizeof(buffer));
561 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n"
562 " <");
563 strcat(bp, ahd->description);
564 strcat(bp, ">\n"
565 " ");
566 ahd_controller_info(ahd, ahd_info);
567 strcat(bp, ahd_info);
568
569 return (bp);
570 }
571
572 /*
573 * Queue an SCB to the controller.
574 */
575 static int
576 ahd_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
577 {
578 struct ahd_softc *ahd;
579 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
580 int rtn = SCSI_MLQUEUE_HOST_BUSY;
581
582 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
583
584 cmd->scsi_done = scsi_done;
585 cmd->result = CAM_REQ_INPROG << 16;
586 rtn = ahd_linux_run_command(ahd, dev, cmd);
587
588 return rtn;
589 }
590
591 static DEF_SCSI_QCMD(ahd_linux_queue)
592
593 static struct scsi_target **
594 ahd_linux_target_in_softc(struct scsi_target *starget)
595 {
596 struct ahd_softc *ahd =
597 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
598 unsigned int target_offset;
599
600 target_offset = starget->id;
601 if (starget->channel != 0)
602 target_offset += 8;
603
604 return &ahd->platform_data->starget[target_offset];
605 }
606
607 static int
608 ahd_linux_target_alloc(struct scsi_target *starget)
609 {
610 struct ahd_softc *ahd =
611 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
612 struct seeprom_config *sc = ahd->seep_config;
613 unsigned long flags;
614 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
615 struct ahd_devinfo devinfo;
616 struct ahd_initiator_tinfo *tinfo;
617 struct ahd_tmode_tstate *tstate;
618 char channel = starget->channel + 'A';
619
620 ahd_lock(ahd, &flags);
621
622 BUG_ON(*ahd_targp != NULL);
623
624 *ahd_targp = starget;
625
626 if (sc) {
627 int flags = sc->device_flags[starget->id];
628
629 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
630 starget->id, &tstate);
631
632 if ((flags & CFPACKETIZED) == 0) {
633 /* don't negotiate packetized (IU) transfers */
634 spi_max_iu(starget) = 0;
635 } else {
636 if ((ahd->features & AHD_RTI) == 0)
637 spi_rti(starget) = 0;
638 }
639
640 if ((flags & CFQAS) == 0)
641 spi_max_qas(starget) = 0;
642
643 /* Transinfo values have been set to BIOS settings */
644 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
645 spi_min_period(starget) = tinfo->user.period;
646 spi_max_offset(starget) = tinfo->user.offset;
647 }
648
649 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
650 starget->id, &tstate);
651 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
652 CAM_LUN_WILDCARD, channel,
653 ROLE_INITIATOR);
654 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
655 AHD_TRANS_GOAL, /*paused*/FALSE);
656 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
657 AHD_TRANS_GOAL, /*paused*/FALSE);
658 ahd_unlock(ahd, &flags);
659
660 return 0;
661 }
662
663 static void
664 ahd_linux_target_destroy(struct scsi_target *starget)
665 {
666 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
667
668 *ahd_targp = NULL;
669 }
670
671 static int
672 ahd_linux_slave_alloc(struct scsi_device *sdev)
673 {
674 struct ahd_softc *ahd =
675 *((struct ahd_softc **)sdev->host->hostdata);
676 struct ahd_linux_device *dev;
677
678 if (bootverbose)
679 printk("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
680
681 dev = scsi_transport_device_data(sdev);
682 memset(dev, 0, sizeof(*dev));
683
684 /*
685 * We start out life using untagged
686 * transactions of which we allow one.
687 */
688 dev->openings = 1;
689
690 /*
691 * Set maxtags to 0. This will be changed if we
692 * later determine that we are dealing with
693 * a tagged queuing capable device.
694 */
695 dev->maxtags = 0;
696
697 return (0);
698 }
699
700 static int
701 ahd_linux_slave_configure(struct scsi_device *sdev)
702 {
703 struct ahd_softc *ahd;
704
705 ahd = *((struct ahd_softc **)sdev->host->hostdata);
706 if (bootverbose)
707 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
708
709 ahd_linux_device_queue_depth(sdev);
710
711 /* Initial Domain Validation */
712 if (!spi_initial_dv(sdev->sdev_target))
713 spi_dv_device(sdev);
714
715 return 0;
716 }
717
718 #if defined(__i386__)
719 /*
720 * Return the disk geometry for the given SCSI device.
721 */
722 static int
723 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
724 sector_t capacity, int geom[])
725 {
726 uint8_t *bh;
727 int heads;
728 int sectors;
729 int cylinders;
730 int ret;
731 int extended;
732 struct ahd_softc *ahd;
733
734 ahd = *((struct ahd_softc **)sdev->host->hostdata);
735
736 bh = scsi_bios_ptable(bdev);
737 if (bh) {
738 ret = scsi_partsize(bh, capacity,
739 &geom[2], &geom[0], &geom[1]);
740 kfree(bh);
741 if (ret != -1)
742 return (ret);
743 }
744 heads = 64;
745 sectors = 32;
746 cylinders = aic_sector_div(capacity, heads, sectors);
747
748 if (aic79xx_extended != 0)
749 extended = 1;
750 else
751 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
752 if (extended && cylinders >= 1024) {
753 heads = 255;
754 sectors = 63;
755 cylinders = aic_sector_div(capacity, heads, sectors);
756 }
757 geom[0] = heads;
758 geom[1] = sectors;
759 geom[2] = cylinders;
760 return (0);
761 }
762 #endif
763
764 /*
765 * Abort the current SCSI command(s).
766 */
767 static int
768 ahd_linux_abort(struct scsi_cmnd *cmd)
769 {
770 int error;
771
772 error = ahd_linux_queue_abort_cmd(cmd);
773
774 return error;
775 }
776
777 /*
778 * Attempt to send a target reset message to the device that timed out.
779 */
780 static int
781 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
782 {
783 struct ahd_softc *ahd;
784 struct ahd_linux_device *dev;
785 struct scb *reset_scb;
786 u_int cdb_byte;
787 int retval = SUCCESS;
788 int paused;
789 int wait;
790 struct ahd_initiator_tinfo *tinfo;
791 struct ahd_tmode_tstate *tstate;
792 unsigned long flags;
793 DECLARE_COMPLETION_ONSTACK(done);
794
795 reset_scb = NULL;
796 paused = FALSE;
797 wait = FALSE;
798 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
799
800 scmd_printk(KERN_INFO, cmd,
801 "Attempting to queue a TARGET RESET message:");
802
803 printk("CDB:");
804 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
805 printk(" 0x%x", cmd->cmnd[cdb_byte]);
806 printk("\n");
807
808 /*
809 * Determine if we currently own this command.
810 */
811 dev = scsi_transport_device_data(cmd->device);
812
813 if (dev == NULL) {
814 /*
815 * No target device for this command exists,
816 * so we must not still own the command.
817 */
818 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
819 return SUCCESS;
820 }
821
822 /*
823 * Generate us a new SCB
824 */
825 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
826 if (!reset_scb) {
827 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
828 return FAILED;
829 }
830
831 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
832 cmd->device->id, &tstate);
833 reset_scb->io_ctx = cmd;
834 reset_scb->platform_data->dev = dev;
835 reset_scb->sg_count = 0;
836 ahd_set_residual(reset_scb, 0);
837 ahd_set_sense_residual(reset_scb, 0);
838 reset_scb->platform_data->xfer_len = 0;
839 reset_scb->hscb->control = 0;
840 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
841 reset_scb->hscb->lun = cmd->device->lun;
842 reset_scb->hscb->cdb_len = 0;
843 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
844 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
845 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
846 reset_scb->flags |= SCB_PACKETIZED;
847 } else {
848 reset_scb->hscb->control |= MK_MESSAGE;
849 }
850 dev->openings--;
851 dev->active++;
852 dev->commands_issued++;
853
854 ahd_lock(ahd, &flags);
855
856 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
857 ahd_queue_scb(ahd, reset_scb);
858
859 ahd->platform_data->eh_done = &done;
860 ahd_unlock(ahd, &flags);
861
862 printk("%s: Device reset code sleeping\n", ahd_name(ahd));
863 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
864 ahd_lock(ahd, &flags);
865 ahd->platform_data->eh_done = NULL;
866 ahd_unlock(ahd, &flags);
867 printk("%s: Device reset timer expired (active %d)\n",
868 ahd_name(ahd), dev->active);
869 retval = FAILED;
870 }
871 printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
872
873 return (retval);
874 }
875
876 /*
877 * Reset the SCSI bus.
878 */
879 static int
880 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
881 {
882 struct ahd_softc *ahd;
883 int found;
884 unsigned long flags;
885
886 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
887 #ifdef AHD_DEBUG
888 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
889 printk("%s: Bus reset called for cmd %p\n",
890 ahd_name(ahd), cmd);
891 #endif
892 ahd_lock(ahd, &flags);
893
894 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
895 /*initiate reset*/TRUE);
896 ahd_unlock(ahd, &flags);
897
898 if (bootverbose)
899 printk("%s: SCSI bus reset delivered. "
900 "%d SCBs aborted.\n", ahd_name(ahd), found);
901
902 return (SUCCESS);
903 }
904
905 struct scsi_host_template aic79xx_driver_template = {
906 .module = THIS_MODULE,
907 .name = "aic79xx",
908 .proc_name = "aic79xx",
909 .proc_info = ahd_linux_proc_info,
910 .info = ahd_linux_info,
911 .queuecommand = ahd_linux_queue,
912 .eh_abort_handler = ahd_linux_abort,
913 .eh_device_reset_handler = ahd_linux_dev_reset,
914 .eh_bus_reset_handler = ahd_linux_bus_reset,
915 #if defined(__i386__)
916 .bios_param = ahd_linux_biosparam,
917 #endif
918 .can_queue = AHD_MAX_QUEUE,
919 .this_id = -1,
920 .max_sectors = 8192,
921 .cmd_per_lun = 2,
922 .use_clustering = ENABLE_CLUSTERING,
923 .slave_alloc = ahd_linux_slave_alloc,
924 .slave_configure = ahd_linux_slave_configure,
925 .target_alloc = ahd_linux_target_alloc,
926 .target_destroy = ahd_linux_target_destroy,
927 };
928
929 /******************************** Bus DMA *************************************/
930 int
931 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
932 bus_size_t alignment, bus_size_t boundary,
933 dma_addr_t lowaddr, dma_addr_t highaddr,
934 bus_dma_filter_t *filter, void *filterarg,
935 bus_size_t maxsize, int nsegments,
936 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
937 {
938 bus_dma_tag_t dmat;
939
940 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
941 if (dmat == NULL)
942 return (ENOMEM);
943
944 /*
945 * Linux is very simplistic about DMA memory. For now don't
946 * maintain all specification information. Once Linux supplies
947 * better facilities for doing these operations, or the
948 * needs of this particular driver change, we might need to do
949 * more here.
950 */
951 dmat->alignment = alignment;
952 dmat->boundary = boundary;
953 dmat->maxsize = maxsize;
954 *ret_tag = dmat;
955 return (0);
956 }
957
958 void
959 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
960 {
961 kfree(dmat);
962 }
963
964 int
965 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
966 int flags, bus_dmamap_t *mapp)
967 {
968 *vaddr = pci_alloc_consistent(ahd->dev_softc,
969 dmat->maxsize, mapp);
970 if (*vaddr == NULL)
971 return (ENOMEM);
972 return(0);
973 }
974
975 void
976 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
977 void* vaddr, bus_dmamap_t map)
978 {
979 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
980 vaddr, map);
981 }
982
983 int
984 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
985 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
986 void *cb_arg, int flags)
987 {
988 /*
989 * Assume for now that this will only be used during
990 * initialization and not for per-transaction buffer mapping.
991 */
992 bus_dma_segment_t stack_sg;
993
994 stack_sg.ds_addr = map;
995 stack_sg.ds_len = dmat->maxsize;
996 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
997 return (0);
998 }
999
1000 void
1001 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1002 {
1003 }
1004
1005 int
1006 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1007 {
1008 /* Nothing to do */
1009 return (0);
1010 }
1011
1012 /********************* Platform Dependent Functions ***************************/
1013 static void
1014 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
1015 {
1016
1017 if ((instance >= 0)
1018 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
1019 uint8_t *iocell_info;
1020
1021 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1022 iocell_info[index] = value & 0xFFFF;
1023 if (bootverbose)
1024 printk("iocell[%d:%ld] = %d\n", instance, index, value);
1025 }
1026 }
1027
1028 static void
1029 ahd_linux_setup_tag_info_global(char *p)
1030 {
1031 int tags, i, j;
1032
1033 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1034 printk("Setting Global Tags= %d\n", tags);
1035
1036 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
1037 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1038 aic79xx_tag_info[i].tag_commands[j] = tags;
1039 }
1040 }
1041 }
1042
1043 static void
1044 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1045 {
1046
1047 if ((instance >= 0) && (targ >= 0)
1048 && (instance < ARRAY_SIZE(aic79xx_tag_info))
1049 && (targ < AHD_NUM_TARGETS)) {
1050 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1051 if (bootverbose)
1052 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
1053 }
1054 }
1055
1056 static char *
1057 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
1058 void (*callback)(u_long, int, int, int32_t),
1059 u_long callback_arg)
1060 {
1061 char *tok_end;
1062 char *tok_end2;
1063 int i;
1064 int instance;
1065 int targ;
1066 int done;
1067 char tok_list[] = {'.', ',', '{', '}', '\0'};
1068
1069 /* All options use a ':' name/arg separator */
1070 if (*opt_arg != ':')
1071 return (opt_arg);
1072 opt_arg++;
1073 instance = -1;
1074 targ = -1;
1075 done = FALSE;
1076 /*
1077 * Restore separator that may be in
1078 * the middle of our option argument.
1079 */
1080 tok_end = strchr(opt_arg, '\0');
1081 if (tok_end < end)
1082 *tok_end = ',';
1083 while (!done) {
1084 switch (*opt_arg) {
1085 case '{':
1086 if (instance == -1) {
1087 instance = 0;
1088 } else {
1089 if (depth > 1) {
1090 if (targ == -1)
1091 targ = 0;
1092 } else {
1093 printk("Malformed Option %s\n",
1094 opt_name);
1095 done = TRUE;
1096 }
1097 }
1098 opt_arg++;
1099 break;
1100 case '}':
1101 if (targ != -1)
1102 targ = -1;
1103 else if (instance != -1)
1104 instance = -1;
1105 opt_arg++;
1106 break;
1107 case ',':
1108 case '.':
1109 if (instance == -1)
1110 done = TRUE;
1111 else if (targ >= 0)
1112 targ++;
1113 else if (instance >= 0)
1114 instance++;
1115 opt_arg++;
1116 break;
1117 case '\0':
1118 done = TRUE;
1119 break;
1120 default:
1121 tok_end = end;
1122 for (i = 0; tok_list[i]; i++) {
1123 tok_end2 = strchr(opt_arg, tok_list[i]);
1124 if ((tok_end2) && (tok_end2 < tok_end))
1125 tok_end = tok_end2;
1126 }
1127 callback(callback_arg, instance, targ,
1128 simple_strtol(opt_arg, NULL, 0));
1129 opt_arg = tok_end;
1130 break;
1131 }
1132 }
1133 return (opt_arg);
1134 }
1135
1136 /*
1137 * Handle Linux boot parameters. This routine allows for assigning a value
1138 * to a parameter with a ':' between the parameter and the value.
1139 * ie. aic79xx=stpwlev:1,extended
1140 */
1141 static int
1142 aic79xx_setup(char *s)
1143 {
1144 int i, n;
1145 char *p;
1146 char *end;
1147
1148 static const struct {
1149 const char *name;
1150 uint32_t *flag;
1151 } options[] = {
1152 { "extended", &aic79xx_extended },
1153 { "no_reset", &aic79xx_no_reset },
1154 { "verbose", &aic79xx_verbose },
1155 { "allow_memio", &aic79xx_allow_memio},
1156 #ifdef AHD_DEBUG
1157 { "debug", &ahd_debug },
1158 #endif
1159 { "periodic_otag", &aic79xx_periodic_otag },
1160 { "pci_parity", &aic79xx_pci_parity },
1161 { "seltime", &aic79xx_seltime },
1162 { "tag_info", NULL },
1163 { "global_tag_depth", NULL},
1164 { "slewrate", NULL },
1165 { "precomp", NULL },
1166 { "amplitude", NULL },
1167 { "slowcrc", &aic79xx_slowcrc },
1168 };
1169
1170 end = strchr(s, '\0');
1171
1172 /*
1173 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1174 * will never be 0 in this case.
1175 */
1176 n = 0;
1177
1178 while ((p = strsep(&s, ",.")) != NULL) {
1179 if (*p == '\0')
1180 continue;
1181 for (i = 0; i < ARRAY_SIZE(options); i++) {
1182
1183 n = strlen(options[i].name);
1184 if (strncmp(options[i].name, p, n) == 0)
1185 break;
1186 }
1187 if (i == ARRAY_SIZE(options))
1188 continue;
1189
1190 if (strncmp(p, "global_tag_depth", n) == 0) {
1191 ahd_linux_setup_tag_info_global(p + n);
1192 } else if (strncmp(p, "tag_info", n) == 0) {
1193 s = ahd_parse_brace_option("tag_info", p + n, end,
1194 2, ahd_linux_setup_tag_info, 0);
1195 } else if (strncmp(p, "slewrate", n) == 0) {
1196 s = ahd_parse_brace_option("slewrate",
1197 p + n, end, 1, ahd_linux_setup_iocell_info,
1198 AIC79XX_SLEWRATE_INDEX);
1199 } else if (strncmp(p, "precomp", n) == 0) {
1200 s = ahd_parse_brace_option("precomp",
1201 p + n, end, 1, ahd_linux_setup_iocell_info,
1202 AIC79XX_PRECOMP_INDEX);
1203 } else if (strncmp(p, "amplitude", n) == 0) {
1204 s = ahd_parse_brace_option("amplitude",
1205 p + n, end, 1, ahd_linux_setup_iocell_info,
1206 AIC79XX_AMPLITUDE_INDEX);
1207 } else if (p[n] == ':') {
1208 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1209 } else if (!strncmp(p, "verbose", n)) {
1210 *(options[i].flag) = 1;
1211 } else {
1212 *(options[i].flag) ^= 0xFFFFFFFF;
1213 }
1214 }
1215 return 1;
1216 }
1217
1218 __setup("aic79xx=", aic79xx_setup);
1219
1220 uint32_t aic79xx_verbose;
1221
1222 int
1223 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1224 {
1225 char buf[80];
1226 struct Scsi_Host *host;
1227 char *new_name;
1228 u_long s;
1229 int retval;
1230
1231 template->name = ahd->description;
1232 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1233 if (host == NULL)
1234 return (ENOMEM);
1235
1236 *((struct ahd_softc **)host->hostdata) = ahd;
1237 ahd->platform_data->host = host;
1238 host->can_queue = AHD_MAX_QUEUE;
1239 host->cmd_per_lun = 2;
1240 host->sg_tablesize = AHD_NSEG;
1241 host->this_id = ahd->our_id;
1242 host->irq = ahd->platform_data->irq;
1243 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1244 host->max_lun = AHD_NUM_LUNS;
1245 host->max_channel = 0;
1246 host->sg_tablesize = AHD_NSEG;
1247 ahd_lock(ahd, &s);
1248 ahd_set_unit(ahd, ahd_linux_unit++);
1249 ahd_unlock(ahd, &s);
1250 sprintf(buf, "scsi%d", host->host_no);
1251 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1252 if (new_name != NULL) {
1253 strcpy(new_name, buf);
1254 ahd_set_name(ahd, new_name);
1255 }
1256 host->unique_id = ahd->unit;
1257 ahd_linux_initialize_scsi_bus(ahd);
1258 ahd_intr_enable(ahd, TRUE);
1259
1260 host->transportt = ahd_linux_transport_template;
1261
1262 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1263 if (retval) {
1264 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1265 scsi_host_put(host);
1266 return retval;
1267 }
1268
1269 scsi_scan_host(host);
1270 return 0;
1271 }
1272
1273 /*
1274 * Place the SCSI bus into a known state by either resetting it,
1275 * or forcing transfer negotiations on the next command to any
1276 * target.
1277 */
1278 static void
1279 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1280 {
1281 u_int target_id;
1282 u_int numtarg;
1283 unsigned long s;
1284
1285 target_id = 0;
1286 numtarg = 0;
1287
1288 if (aic79xx_no_reset != 0)
1289 ahd->flags &= ~AHD_RESET_BUS_A;
1290
1291 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1292 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1293 else
1294 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1295
1296 ahd_lock(ahd, &s);
1297
1298 /*
1299 * Force negotiation to async for all targets that
1300 * will not see an initial bus reset.
1301 */
1302 for (; target_id < numtarg; target_id++) {
1303 struct ahd_devinfo devinfo;
1304 struct ahd_initiator_tinfo *tinfo;
1305 struct ahd_tmode_tstate *tstate;
1306
1307 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1308 target_id, &tstate);
1309 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1310 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1311 ahd_update_neg_request(ahd, &devinfo, tstate,
1312 tinfo, AHD_NEG_ALWAYS);
1313 }
1314 ahd_unlock(ahd, &s);
1315 /* Give the bus some time to recover */
1316 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1317 ahd_freeze_simq(ahd);
1318 msleep(AIC79XX_RESET_DELAY);
1319 ahd_release_simq(ahd);
1320 }
1321 }
1322
1323 int
1324 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1325 {
1326 ahd->platform_data =
1327 kmalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC);
1328 if (ahd->platform_data == NULL)
1329 return (ENOMEM);
1330 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1331 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1332 ahd_lockinit(ahd);
1333 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1334 return (0);
1335 }
1336
1337 void
1338 ahd_platform_free(struct ahd_softc *ahd)
1339 {
1340 struct scsi_target *starget;
1341 int i;
1342
1343 if (ahd->platform_data != NULL) {
1344 /* destroy all of the device and target objects */
1345 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1346 starget = ahd->platform_data->starget[i];
1347 if (starget != NULL) {
1348 ahd->platform_data->starget[i] = NULL;
1349 }
1350 }
1351
1352 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1353 free_irq(ahd->platform_data->irq, ahd);
1354 if (ahd->tags[0] == BUS_SPACE_PIO
1355 && ahd->bshs[0].ioport != 0)
1356 release_region(ahd->bshs[0].ioport, 256);
1357 if (ahd->tags[1] == BUS_SPACE_PIO
1358 && ahd->bshs[1].ioport != 0)
1359 release_region(ahd->bshs[1].ioport, 256);
1360 if (ahd->tags[0] == BUS_SPACE_MEMIO
1361 && ahd->bshs[0].maddr != NULL) {
1362 iounmap(ahd->bshs[0].maddr);
1363 release_mem_region(ahd->platform_data->mem_busaddr,
1364 0x1000);
1365 }
1366 if (ahd->platform_data->host)
1367 scsi_host_put(ahd->platform_data->host);
1368
1369 kfree(ahd->platform_data);
1370 }
1371 }
1372
1373 void
1374 ahd_platform_init(struct ahd_softc *ahd)
1375 {
1376 /*
1377 * Lookup and commit any modified IO Cell options.
1378 */
1379 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1380 const struct ahd_linux_iocell_opts *iocell_opts;
1381
1382 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1383 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1384 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1385 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1386 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1387 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1388 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1389 }
1390
1391 }
1392
1393 void
1394 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1395 {
1396 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1397 SCB_GET_CHANNEL(ahd, scb),
1398 SCB_GET_LUN(scb), SCB_LIST_NULL,
1399 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1400 }
1401
1402 void
1403 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1404 struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1405 {
1406 struct ahd_linux_device *dev;
1407 int was_queuing;
1408 int now_queuing;
1409
1410 if (sdev == NULL)
1411 return;
1412
1413 dev = scsi_transport_device_data(sdev);
1414
1415 if (dev == NULL)
1416 return;
1417 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1418 switch (alg) {
1419 default:
1420 case AHD_QUEUE_NONE:
1421 now_queuing = 0;
1422 break;
1423 case AHD_QUEUE_BASIC:
1424 now_queuing = AHD_DEV_Q_BASIC;
1425 break;
1426 case AHD_QUEUE_TAGGED:
1427 now_queuing = AHD_DEV_Q_TAGGED;
1428 break;
1429 }
1430 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1431 && (was_queuing != now_queuing)
1432 && (dev->active != 0)) {
1433 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1434 dev->qfrozen++;
1435 }
1436
1437 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1438 if (now_queuing) {
1439 u_int usertags;
1440
1441 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1442 if (!was_queuing) {
1443 /*
1444 * Start out aggressively and allow our
1445 * dynamic queue depth algorithm to take
1446 * care of the rest.
1447 */
1448 dev->maxtags = usertags;
1449 dev->openings = dev->maxtags - dev->active;
1450 }
1451 if (dev->maxtags == 0) {
1452 /*
1453 * Queueing is disabled by the user.
1454 */
1455 dev->openings = 1;
1456 } else if (alg == AHD_QUEUE_TAGGED) {
1457 dev->flags |= AHD_DEV_Q_TAGGED;
1458 if (aic79xx_periodic_otag != 0)
1459 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1460 } else
1461 dev->flags |= AHD_DEV_Q_BASIC;
1462 } else {
1463 /* We can only have one opening. */
1464 dev->maxtags = 0;
1465 dev->openings = 1 - dev->active;
1466 }
1467
1468 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1469 case AHD_DEV_Q_BASIC:
1470 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1471 scsi_activate_tcq(sdev, dev->openings + dev->active);
1472 break;
1473 case AHD_DEV_Q_TAGGED:
1474 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1475 scsi_activate_tcq(sdev, dev->openings + dev->active);
1476 break;
1477 default:
1478 /*
1479 * We allow the OS to queue 2 untagged transactions to
1480 * us at any time even though we can only execute them
1481 * serially on the controller/device. This should
1482 * remove some latency.
1483 */
1484 scsi_deactivate_tcq(sdev, 1);
1485 break;
1486 }
1487 }
1488
1489 int
1490 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1491 int lun, u_int tag, role_t role, uint32_t status)
1492 {
1493 return 0;
1494 }
1495
1496 static u_int
1497 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1498 {
1499 static int warned_user;
1500 u_int tags;
1501
1502 tags = 0;
1503 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1504 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1505
1506 if (warned_user == 0) {
1507 printk(KERN_WARNING
1508 "aic79xx: WARNING: Insufficient tag_info instances\n"
1509 "aic79xx: for installed controllers. Using defaults\n"
1510 "aic79xx: Please update the aic79xx_tag_info array in\n"
1511 "aic79xx: the aic79xx_osm.c source file.\n");
1512 warned_user++;
1513 }
1514 tags = AHD_MAX_QUEUE;
1515 } else {
1516 adapter_tag_info_t *tag_info;
1517
1518 tag_info = &aic79xx_tag_info[ahd->unit];
1519 tags = tag_info->tag_commands[devinfo->target_offset];
1520 if (tags > AHD_MAX_QUEUE)
1521 tags = AHD_MAX_QUEUE;
1522 }
1523 }
1524 return (tags);
1525 }
1526
1527 /*
1528 * Determines the queue depth for a given device.
1529 */
1530 static void
1531 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1532 {
1533 struct ahd_devinfo devinfo;
1534 u_int tags;
1535 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1536
1537 ahd_compile_devinfo(&devinfo,
1538 ahd->our_id,
1539 sdev->sdev_target->id, sdev->lun,
1540 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1541 ROLE_INITIATOR);
1542 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1543 if (tags != 0 && sdev->tagged_supported != 0) {
1544
1545 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1546 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1547 devinfo.lun, AC_TRANSFER_NEG);
1548 ahd_print_devinfo(ahd, &devinfo);
1549 printk("Tagged Queuing enabled. Depth %d\n", tags);
1550 } else {
1551 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1552 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1553 devinfo.lun, AC_TRANSFER_NEG);
1554 }
1555 }
1556
1557 static int
1558 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1559 struct scsi_cmnd *cmd)
1560 {
1561 struct scb *scb;
1562 struct hardware_scb *hscb;
1563 struct ahd_initiator_tinfo *tinfo;
1564 struct ahd_tmode_tstate *tstate;
1565 u_int col_idx;
1566 uint16_t mask;
1567 unsigned long flags;
1568 int nseg;
1569
1570 nseg = scsi_dma_map(cmd);
1571 if (nseg < 0)
1572 return SCSI_MLQUEUE_HOST_BUSY;
1573
1574 ahd_lock(ahd, &flags);
1575
1576 /*
1577 * Get an scb to use.
1578 */
1579 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1580 cmd->device->id, &tstate);
1581 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1582 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1583 col_idx = AHD_NEVER_COL_IDX;
1584 } else {
1585 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1586 cmd->device->lun);
1587 }
1588 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1589 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1590 ahd_unlock(ahd, &flags);
1591 scsi_dma_unmap(cmd);
1592 return SCSI_MLQUEUE_HOST_BUSY;
1593 }
1594
1595 scb->io_ctx = cmd;
1596 scb->platform_data->dev = dev;
1597 hscb = scb->hscb;
1598 cmd->host_scribble = (char *)scb;
1599
1600 /*
1601 * Fill out basics of the HSCB.
1602 */
1603 hscb->control = 0;
1604 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1605 hscb->lun = cmd->device->lun;
1606 scb->hscb->task_management = 0;
1607 mask = SCB_GET_TARGET_MASK(ahd, scb);
1608
1609 if ((ahd->user_discenable & mask) != 0)
1610 hscb->control |= DISCENB;
1611
1612 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1613 scb->flags |= SCB_PACKETIZED;
1614
1615 if ((tstate->auto_negotiate & mask) != 0) {
1616 scb->flags |= SCB_AUTO_NEGOTIATE;
1617 scb->hscb->control |= MK_MESSAGE;
1618 }
1619
1620 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1621 int msg_bytes;
1622 uint8_t tag_msgs[2];
1623
1624 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1625 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1626 hscb->control |= tag_msgs[0];
1627 if (tag_msgs[0] == MSG_ORDERED_TASK)
1628 dev->commands_since_idle_or_otag = 0;
1629 } else
1630 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1631 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1632 hscb->control |= MSG_ORDERED_TASK;
1633 dev->commands_since_idle_or_otag = 0;
1634 } else {
1635 hscb->control |= MSG_SIMPLE_TASK;
1636 }
1637 }
1638
1639 hscb->cdb_len = cmd->cmd_len;
1640 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1641
1642 scb->platform_data->xfer_len = 0;
1643 ahd_set_residual(scb, 0);
1644 ahd_set_sense_residual(scb, 0);
1645 scb->sg_count = 0;
1646
1647 if (nseg > 0) {
1648 void *sg = scb->sg_list;
1649 struct scatterlist *cur_seg;
1650 int i;
1651
1652 scb->platform_data->xfer_len = 0;
1653
1654 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1655 dma_addr_t addr;
1656 bus_size_t len;
1657
1658 addr = sg_dma_address(cur_seg);
1659 len = sg_dma_len(cur_seg);
1660 scb->platform_data->xfer_len += len;
1661 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1662 i == (nseg - 1));
1663 }
1664 }
1665
1666 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1667 dev->openings--;
1668 dev->active++;
1669 dev->commands_issued++;
1670
1671 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1672 dev->commands_since_idle_or_otag++;
1673 scb->flags |= SCB_ACTIVE;
1674 ahd_queue_scb(ahd, scb);
1675
1676 ahd_unlock(ahd, &flags);
1677
1678 return 0;
1679 }
1680
1681 /*
1682 * SCSI controller interrupt handler.
1683 */
1684 irqreturn_t
1685 ahd_linux_isr(int irq, void *dev_id)
1686 {
1687 struct ahd_softc *ahd;
1688 u_long flags;
1689 int ours;
1690
1691 ahd = (struct ahd_softc *) dev_id;
1692 ahd_lock(ahd, &flags);
1693 ours = ahd_intr(ahd);
1694 ahd_unlock(ahd, &flags);
1695 return IRQ_RETVAL(ours);
1696 }
1697
1698 void
1699 ahd_send_async(struct ahd_softc *ahd, char channel,
1700 u_int target, u_int lun, ac_code code)
1701 {
1702 switch (code) {
1703 case AC_TRANSFER_NEG:
1704 {
1705 char buf[80];
1706 struct scsi_target *starget;
1707 struct info_str info;
1708 struct ahd_initiator_tinfo *tinfo;
1709 struct ahd_tmode_tstate *tstate;
1710 unsigned int target_ppr_options;
1711
1712 BUG_ON(target == CAM_TARGET_WILDCARD);
1713
1714 info.buffer = buf;
1715 info.length = sizeof(buf);
1716 info.offset = 0;
1717 info.pos = 0;
1718 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1719 target, &tstate);
1720
1721 /*
1722 * Don't bother reporting results while
1723 * negotiations are still pending.
1724 */
1725 if (tinfo->curr.period != tinfo->goal.period
1726 || tinfo->curr.width != tinfo->goal.width
1727 || tinfo->curr.offset != tinfo->goal.offset
1728 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1729 if (bootverbose == 0)
1730 break;
1731
1732 /*
1733 * Don't bother reporting results that
1734 * are identical to those last reported.
1735 */
1736 starget = ahd->platform_data->starget[target];
1737 if (starget == NULL)
1738 break;
1739
1740 target_ppr_options =
1741 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1742 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1743 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1744 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1745 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1746 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1747 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1748 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1749
1750 if (tinfo->curr.period == spi_period(starget)
1751 && tinfo->curr.width == spi_width(starget)
1752 && tinfo->curr.offset == spi_offset(starget)
1753 && tinfo->curr.ppr_options == target_ppr_options)
1754 if (bootverbose == 0)
1755 break;
1756
1757 spi_period(starget) = tinfo->curr.period;
1758 spi_width(starget) = tinfo->curr.width;
1759 spi_offset(starget) = tinfo->curr.offset;
1760 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1761 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1762 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1763 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1764 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1765 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1766 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1767 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1768 spi_display_xfer_agreement(starget);
1769 break;
1770 }
1771 case AC_SENT_BDR:
1772 {
1773 WARN_ON(lun != CAM_LUN_WILDCARD);
1774 scsi_report_device_reset(ahd->platform_data->host,
1775 channel - 'A', target);
1776 break;
1777 }
1778 case AC_BUS_RESET:
1779 if (ahd->platform_data->host != NULL) {
1780 scsi_report_bus_reset(ahd->platform_data->host,
1781 channel - 'A');
1782 }
1783 break;
1784 default:
1785 panic("ahd_send_async: Unexpected async event");
1786 }
1787 }
1788
1789 /*
1790 * Calls the higher level scsi done function and frees the scb.
1791 */
1792 void
1793 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1794 {
1795 struct scsi_cmnd *cmd;
1796 struct ahd_linux_device *dev;
1797
1798 if ((scb->flags & SCB_ACTIVE) == 0) {
1799 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1800 ahd_dump_card_state(ahd);
1801 panic("Stopping for safety");
1802 }
1803 LIST_REMOVE(scb, pending_links);
1804 cmd = scb->io_ctx;
1805 dev = scb->platform_data->dev;
1806 dev->active--;
1807 dev->openings++;
1808 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1809 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1810 dev->qfrozen--;
1811 }
1812 ahd_linux_unmap_scb(ahd, scb);
1813
1814 /*
1815 * Guard against stale sense data.
1816 * The Linux mid-layer assumes that sense
1817 * was retrieved anytime the first byte of
1818 * the sense buffer looks "sane".
1819 */
1820 cmd->sense_buffer[0] = 0;
1821 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1822 uint32_t amount_xferred;
1823
1824 amount_xferred =
1825 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1826 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1827 #ifdef AHD_DEBUG
1828 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1829 ahd_print_path(ahd, scb);
1830 printk("Set CAM_UNCOR_PARITY\n");
1831 }
1832 #endif
1833 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1834 #ifdef AHD_REPORT_UNDERFLOWS
1835 /*
1836 * This code is disabled by default as some
1837 * clients of the SCSI system do not properly
1838 * initialize the underflow parameter. This
1839 * results in spurious termination of commands
1840 * that complete as expected (e.g. underflow is
1841 * allowed as command can return variable amounts
1842 * of data.
1843 */
1844 } else if (amount_xferred < scb->io_ctx->underflow) {
1845 u_int i;
1846
1847 ahd_print_path(ahd, scb);
1848 printk("CDB:");
1849 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1850 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1851 printk("\n");
1852 ahd_print_path(ahd, scb);
1853 printk("Saw underflow (%ld of %ld bytes). "
1854 "Treated as error\n",
1855 ahd_get_residual(scb),
1856 ahd_get_transfer_length(scb));
1857 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1858 #endif
1859 } else {
1860 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1861 }
1862 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1863 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1864 }
1865
1866 if (dev->openings == 1
1867 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1868 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1869 dev->tag_success_count++;
1870 /*
1871 * Some devices deal with temporary internal resource
1872 * shortages by returning queue full. When the queue
1873 * full occurrs, we throttle back. Slowly try to get
1874 * back to our previous queue depth.
1875 */
1876 if ((dev->openings + dev->active) < dev->maxtags
1877 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1878 dev->tag_success_count = 0;
1879 dev->openings++;
1880 }
1881
1882 if (dev->active == 0)
1883 dev->commands_since_idle_or_otag = 0;
1884
1885 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1886 printk("Recovery SCB completes\n");
1887 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1888 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1889 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1890
1891 if (ahd->platform_data->eh_done)
1892 complete(ahd->platform_data->eh_done);
1893 }
1894
1895 ahd_free_scb(ahd, scb);
1896 ahd_linux_queue_cmd_complete(ahd, cmd);
1897 }
1898
1899 static void
1900 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1901 struct scsi_device *sdev, struct scb *scb)
1902 {
1903 struct ahd_devinfo devinfo;
1904 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1905
1906 ahd_compile_devinfo(&devinfo,
1907 ahd->our_id,
1908 sdev->sdev_target->id, sdev->lun,
1909 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1910 ROLE_INITIATOR);
1911
1912 /*
1913 * We don't currently trust the mid-layer to
1914 * properly deal with queue full or busy. So,
1915 * when one occurs, we tell the mid-layer to
1916 * unconditionally requeue the command to us
1917 * so that we can retry it ourselves. We also
1918 * implement our own throttling mechanism so
1919 * we don't clobber the device with too many
1920 * commands.
1921 */
1922 switch (ahd_get_scsi_status(scb)) {
1923 default:
1924 break;
1925 case SCSI_STATUS_CHECK_COND:
1926 case SCSI_STATUS_CMD_TERMINATED:
1927 {
1928 struct scsi_cmnd *cmd;
1929
1930 /*
1931 * Copy sense information to the OS's cmd
1932 * structure if it is available.
1933 */
1934 cmd = scb->io_ctx;
1935 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1936 struct scsi_status_iu_header *siu;
1937 u_int sense_size;
1938 u_int sense_offset;
1939
1940 if (scb->flags & SCB_SENSE) {
1941 sense_size = min(sizeof(struct scsi_sense_data)
1942 - ahd_get_sense_residual(scb),
1943 (u_long)SCSI_SENSE_BUFFERSIZE);
1944 sense_offset = 0;
1945 } else {
1946 /*
1947 * Copy only the sense data into the provided
1948 * buffer.
1949 */
1950 siu = (struct scsi_status_iu_header *)
1951 scb->sense_data;
1952 sense_size = min_t(size_t,
1953 scsi_4btoul(siu->sense_length),
1954 SCSI_SENSE_BUFFERSIZE);
1955 sense_offset = SIU_SENSE_OFFSET(siu);
1956 }
1957
1958 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1959 memcpy(cmd->sense_buffer,
1960 ahd_get_sense_buf(ahd, scb)
1961 + sense_offset, sense_size);
1962 cmd->result |= (DRIVER_SENSE << 24);
1963
1964 #ifdef AHD_DEBUG
1965 if (ahd_debug & AHD_SHOW_SENSE) {
1966 int i;
1967
1968 printk("Copied %d bytes of sense data at %d:",
1969 sense_size, sense_offset);
1970 for (i = 0; i < sense_size; i++) {
1971 if ((i & 0xF) == 0)
1972 printk("\n");
1973 printk("0x%x ", cmd->sense_buffer[i]);
1974 }
1975 printk("\n");
1976 }
1977 #endif
1978 }
1979 break;
1980 }
1981 case SCSI_STATUS_QUEUE_FULL:
1982 /*
1983 * By the time the core driver has returned this
1984 * command, all other commands that were queued
1985 * to us but not the device have been returned.
1986 * This ensures that dev->active is equal to
1987 * the number of commands actually queued to
1988 * the device.
1989 */
1990 dev->tag_success_count = 0;
1991 if (dev->active != 0) {
1992 /*
1993 * Drop our opening count to the number
1994 * of commands currently outstanding.
1995 */
1996 dev->openings = 0;
1997 #ifdef AHD_DEBUG
1998 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1999 ahd_print_path(ahd, scb);
2000 printk("Dropping tag count to %d\n",
2001 dev->active);
2002 }
2003 #endif
2004 if (dev->active == dev->tags_on_last_queuefull) {
2005
2006 dev->last_queuefull_same_count++;
2007 /*
2008 * If we repeatedly see a queue full
2009 * at the same queue depth, this
2010 * device has a fixed number of tag
2011 * slots. Lock in this tag depth
2012 * so we stop seeing queue fulls from
2013 * this device.
2014 */
2015 if (dev->last_queuefull_same_count
2016 == AHD_LOCK_TAGS_COUNT) {
2017 dev->maxtags = dev->active;
2018 ahd_print_path(ahd, scb);
2019 printk("Locking max tag count at %d\n",
2020 dev->active);
2021 }
2022 } else {
2023 dev->tags_on_last_queuefull = dev->active;
2024 dev->last_queuefull_same_count = 0;
2025 }
2026 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
2027 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
2028 ahd_platform_set_tags(ahd, sdev, &devinfo,
2029 (dev->flags & AHD_DEV_Q_BASIC)
2030 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2031 break;
2032 }
2033 /*
2034 * Drop down to a single opening, and treat this
2035 * as if the target returned BUSY SCSI status.
2036 */
2037 dev->openings = 1;
2038 ahd_platform_set_tags(ahd, sdev, &devinfo,
2039 (dev->flags & AHD_DEV_Q_BASIC)
2040 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2041 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
2042 }
2043 }
2044
2045 static void
2046 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
2047 {
2048 int status;
2049 int new_status = DID_OK;
2050 int do_fallback = 0;
2051 int scsi_status;
2052
2053 /*
2054 * Map CAM error codes into Linux Error codes. We
2055 * avoid the conversion so that the DV code has the
2056 * full error information available when making
2057 * state change decisions.
2058 */
2059
2060 status = ahd_cmd_get_transaction_status(cmd);
2061 switch (status) {
2062 case CAM_REQ_INPROG:
2063 case CAM_REQ_CMP:
2064 new_status = DID_OK;
2065 break;
2066 case CAM_AUTOSENSE_FAIL:
2067 new_status = DID_ERROR;
2068 /* Fallthrough */
2069 case CAM_SCSI_STATUS_ERROR:
2070 scsi_status = ahd_cmd_get_scsi_status(cmd);
2071
2072 switch(scsi_status) {
2073 case SCSI_STATUS_CMD_TERMINATED:
2074 case SCSI_STATUS_CHECK_COND:
2075 if ((cmd->result >> 24) != DRIVER_SENSE) {
2076 do_fallback = 1;
2077 } else {
2078 struct scsi_sense_data *sense;
2079
2080 sense = (struct scsi_sense_data *)
2081 cmd->sense_buffer;
2082 if (sense->extra_len >= 5 &&
2083 (sense->add_sense_code == 0x47
2084 || sense->add_sense_code == 0x48))
2085 do_fallback = 1;
2086 }
2087 break;
2088 default:
2089 break;
2090 }
2091 break;
2092 case CAM_REQ_ABORTED:
2093 new_status = DID_ABORT;
2094 break;
2095 case CAM_BUSY:
2096 new_status = DID_BUS_BUSY;
2097 break;
2098 case CAM_REQ_INVALID:
2099 case CAM_PATH_INVALID:
2100 new_status = DID_BAD_TARGET;
2101 break;
2102 case CAM_SEL_TIMEOUT:
2103 new_status = DID_NO_CONNECT;
2104 break;
2105 case CAM_SCSI_BUS_RESET:
2106 case CAM_BDR_SENT:
2107 new_status = DID_RESET;
2108 break;
2109 case CAM_UNCOR_PARITY:
2110 new_status = DID_PARITY;
2111 do_fallback = 1;
2112 break;
2113 case CAM_CMD_TIMEOUT:
2114 new_status = DID_TIME_OUT;
2115 do_fallback = 1;
2116 break;
2117 case CAM_REQ_CMP_ERR:
2118 case CAM_UNEXP_BUSFREE:
2119 case CAM_DATA_RUN_ERR:
2120 new_status = DID_ERROR;
2121 do_fallback = 1;
2122 break;
2123 case CAM_UA_ABORT:
2124 case CAM_NO_HBA:
2125 case CAM_SEQUENCE_FAIL:
2126 case CAM_CCB_LEN_ERR:
2127 case CAM_PROVIDE_FAIL:
2128 case CAM_REQ_TERMIO:
2129 case CAM_UNREC_HBA_ERROR:
2130 case CAM_REQ_TOO_BIG:
2131 new_status = DID_ERROR;
2132 break;
2133 case CAM_REQUEUE_REQ:
2134 new_status = DID_REQUEUE;
2135 break;
2136 default:
2137 /* We should never get here */
2138 new_status = DID_ERROR;
2139 break;
2140 }
2141
2142 if (do_fallback) {
2143 printk("%s: device overrun (status %x) on %d:%d:%d\n",
2144 ahd_name(ahd), status, cmd->device->channel,
2145 cmd->device->id, cmd->device->lun);
2146 }
2147
2148 ahd_cmd_set_transaction_status(cmd, new_status);
2149
2150 cmd->scsi_done(cmd);
2151 }
2152
2153 static void
2154 ahd_freeze_simq(struct ahd_softc *ahd)
2155 {
2156 scsi_block_requests(ahd->platform_data->host);
2157 }
2158
2159 static void
2160 ahd_release_simq(struct ahd_softc *ahd)
2161 {
2162 scsi_unblock_requests(ahd->platform_data->host);
2163 }
2164
2165 static int
2166 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2167 {
2168 struct ahd_softc *ahd;
2169 struct ahd_linux_device *dev;
2170 struct scb *pending_scb;
2171 u_int saved_scbptr;
2172 u_int active_scbptr;
2173 u_int last_phase;
2174 u_int saved_scsiid;
2175 u_int cdb_byte;
2176 int retval;
2177 int was_paused;
2178 int paused;
2179 int wait;
2180 int disconnected;
2181 ahd_mode_state saved_modes;
2182 unsigned long flags;
2183
2184 pending_scb = NULL;
2185 paused = FALSE;
2186 wait = FALSE;
2187 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2188
2189 scmd_printk(KERN_INFO, cmd,
2190 "Attempting to queue an ABORT message:");
2191
2192 printk("CDB:");
2193 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2194 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2195 printk("\n");
2196
2197 ahd_lock(ahd, &flags);
2198
2199 /*
2200 * First determine if we currently own this command.
2201 * Start by searching the device queue. If not found
2202 * there, check the pending_scb list. If not found
2203 * at all, and the system wanted us to just abort the
2204 * command, return success.
2205 */
2206 dev = scsi_transport_device_data(cmd->device);
2207
2208 if (dev == NULL) {
2209 /*
2210 * No target device for this command exists,
2211 * so we must not still own the command.
2212 */
2213 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2214 retval = SUCCESS;
2215 goto no_cmd;
2216 }
2217
2218 /*
2219 * See if we can find a matching cmd in the pending list.
2220 */
2221 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2222 if (pending_scb->io_ctx == cmd)
2223 break;
2224 }
2225
2226 if (pending_scb == NULL) {
2227 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2228 goto no_cmd;
2229 }
2230
2231 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2232 /*
2233 * We can't queue two recovery actions using the same SCB
2234 */
2235 retval = FAILED;
2236 goto done;
2237 }
2238
2239 /*
2240 * Ensure that the card doesn't do anything
2241 * behind our back. Also make sure that we
2242 * didn't "just" miss an interrupt that would
2243 * affect this cmd.
2244 */
2245 was_paused = ahd_is_paused(ahd);
2246 ahd_pause_and_flushwork(ahd);
2247 paused = TRUE;
2248
2249 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2250 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2251 goto no_cmd;
2252 }
2253
2254 printk("%s: At time of recovery, card was %spaused\n",
2255 ahd_name(ahd), was_paused ? "" : "not ");
2256 ahd_dump_card_state(ahd);
2257
2258 disconnected = TRUE;
2259 if (ahd_search_qinfifo(ahd, cmd->device->id,
2260 cmd->device->channel + 'A',
2261 cmd->device->lun,
2262 pending_scb->hscb->tag,
2263 ROLE_INITIATOR, CAM_REQ_ABORTED,
2264 SEARCH_COMPLETE) > 0) {
2265 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2266 ahd_name(ahd), cmd->device->channel,
2267 cmd->device->id, cmd->device->lun);
2268 retval = SUCCESS;
2269 goto done;
2270 }
2271
2272 saved_modes = ahd_save_modes(ahd);
2273 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2274 last_phase = ahd_inb(ahd, LASTPHASE);
2275 saved_scbptr = ahd_get_scbptr(ahd);
2276 active_scbptr = saved_scbptr;
2277 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2278 struct scb *bus_scb;
2279
2280 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2281 if (bus_scb == pending_scb)
2282 disconnected = FALSE;
2283 }
2284
2285 /*
2286 * At this point, pending_scb is the scb associated with the
2287 * passed in command. That command is currently active on the
2288 * bus or is in the disconnected state.
2289 */
2290 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2291 if (last_phase != P_BUSFREE
2292 && SCB_GET_TAG(pending_scb) == active_scbptr) {
2293
2294 /*
2295 * We're active on the bus, so assert ATN
2296 * and hope that the target responds.
2297 */
2298 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2299 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2300 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2301 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2302 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2303 wait = TRUE;
2304 } else if (disconnected) {
2305
2306 /*
2307 * Actually re-queue this SCB in an attempt
2308 * to select the device before it reconnects.
2309 */
2310 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2311 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2312 pending_scb->hscb->cdb_len = 0;
2313 pending_scb->hscb->task_attribute = 0;
2314 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2315
2316 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2317 /*
2318 * Mark the SCB has having an outstanding
2319 * task management function. Should the command
2320 * complete normally before the task management
2321 * function can be sent, the host will be notified
2322 * to abort our requeued SCB.
2323 */
2324 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2325 pending_scb->hscb->task_management);
2326 } else {
2327 /*
2328 * If non-packetized, set the MK_MESSAGE control
2329 * bit indicating that we desire to send a message.
2330 * We also set the disconnected flag since there is
2331 * no guarantee that our SCB control byte matches
2332 * the version on the card. We don't want the
2333 * sequencer to abort the command thinking an
2334 * unsolicited reselection occurred.
2335 */
2336 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2337
2338 /*
2339 * The sequencer will never re-reference the
2340 * in-core SCB. To make sure we are notified
2341 * during reselection, set the MK_MESSAGE flag in
2342 * the card's copy of the SCB.
2343 */
2344 ahd_outb(ahd, SCB_CONTROL,
2345 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2346 }
2347
2348 /*
2349 * Clear out any entries in the QINFIFO first
2350 * so we are the next SCB for this target
2351 * to run.
2352 */
2353 ahd_search_qinfifo(ahd, cmd->device->id,
2354 cmd->device->channel + 'A', cmd->device->lun,
2355 SCB_LIST_NULL, ROLE_INITIATOR,
2356 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2357 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2358 ahd_set_scbptr(ahd, saved_scbptr);
2359 ahd_print_path(ahd, pending_scb);
2360 printk("Device is disconnected, re-queuing SCB\n");
2361 wait = TRUE;
2362 } else {
2363 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2364 retval = FAILED;
2365 goto done;
2366 }
2367
2368 no_cmd:
2369 /*
2370 * Our assumption is that if we don't have the command, no
2371 * recovery action was required, so we return success. Again,
2372 * the semantics of the mid-layer recovery engine are not
2373 * well defined, so this may change in time.
2374 */
2375 retval = SUCCESS;
2376 done:
2377 if (paused)
2378 ahd_unpause(ahd);
2379 if (wait) {
2380 DECLARE_COMPLETION_ONSTACK(done);
2381
2382 ahd->platform_data->eh_done = &done;
2383 ahd_unlock(ahd, &flags);
2384
2385 printk("%s: Recovery code sleeping\n", ahd_name(ahd));
2386 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2387 ahd_lock(ahd, &flags);
2388 ahd->platform_data->eh_done = NULL;
2389 ahd_unlock(ahd, &flags);
2390 printk("%s: Timer Expired (active %d)\n",
2391 ahd_name(ahd), dev->active);
2392 retval = FAILED;
2393 }
2394 printk("Recovery code awake\n");
2395 } else
2396 ahd_unlock(ahd, &flags);
2397
2398 if (retval != SUCCESS)
2399 printk("%s: Command abort returning 0x%x\n",
2400 ahd_name(ahd), retval);
2401
2402 return retval;
2403 }
2404
2405 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2406 {
2407 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2408 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2409 struct ahd_devinfo devinfo;
2410 unsigned long flags;
2411
2412 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2413 starget->channel + 'A', ROLE_INITIATOR);
2414 ahd_lock(ahd, &flags);
2415 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2416 ahd_unlock(ahd, &flags);
2417 }
2418
2419 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2420 {
2421 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2422 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2423 struct ahd_tmode_tstate *tstate;
2424 struct ahd_initiator_tinfo *tinfo
2425 = ahd_fetch_transinfo(ahd,
2426 starget->channel + 'A',
2427 shost->this_id, starget->id, &tstate);
2428 struct ahd_devinfo devinfo;
2429 unsigned int ppr_options = tinfo->goal.ppr_options;
2430 unsigned int dt;
2431 unsigned long flags;
2432 unsigned long offset = tinfo->goal.offset;
2433
2434 #ifdef AHD_DEBUG
2435 if ((ahd_debug & AHD_SHOW_DV) != 0)
2436 printk("%s: set period to %d\n", ahd_name(ahd), period);
2437 #endif
2438 if (offset == 0)
2439 offset = MAX_OFFSET;
2440
2441 if (period < 8)
2442 period = 8;
2443 if (period < 10) {
2444 if (spi_max_width(starget)) {
2445 ppr_options |= MSG_EXT_PPR_DT_REQ;
2446 if (period == 8)
2447 ppr_options |= MSG_EXT_PPR_IU_REQ;
2448 } else
2449 period = 10;
2450 }
2451
2452 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2453
2454 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2455 starget->channel + 'A', ROLE_INITIATOR);
2456
2457 /* all PPR requests apart from QAS require wide transfers */
2458 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2459 if (spi_width(starget) == 0)
2460 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2461 }
2462
2463 ahd_find_syncrate(ahd, &period, &ppr_options,
2464 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2465
2466 ahd_lock(ahd, &flags);
2467 ahd_set_syncrate(ahd, &devinfo, period, offset,
2468 ppr_options, AHD_TRANS_GOAL, FALSE);
2469 ahd_unlock(ahd, &flags);
2470 }
2471
2472 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2473 {
2474 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2475 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2476 struct ahd_tmode_tstate *tstate;
2477 struct ahd_initiator_tinfo *tinfo
2478 = ahd_fetch_transinfo(ahd,
2479 starget->channel + 'A',
2480 shost->this_id, starget->id, &tstate);
2481 struct ahd_devinfo devinfo;
2482 unsigned int ppr_options = 0;
2483 unsigned int period = 0;
2484 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2485 unsigned long flags;
2486
2487 #ifdef AHD_DEBUG
2488 if ((ahd_debug & AHD_SHOW_DV) != 0)
2489 printk("%s: set offset to %d\n", ahd_name(ahd), offset);
2490 #endif
2491
2492 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2493 starget->channel + 'A', ROLE_INITIATOR);
2494 if (offset != 0) {
2495 period = tinfo->goal.period;
2496 ppr_options = tinfo->goal.ppr_options;
2497 ahd_find_syncrate(ahd, &period, &ppr_options,
2498 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2499 }
2500
2501 ahd_lock(ahd, &flags);
2502 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2503 AHD_TRANS_GOAL, FALSE);
2504 ahd_unlock(ahd, &flags);
2505 }
2506
2507 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2508 {
2509 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2510 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2511 struct ahd_tmode_tstate *tstate;
2512 struct ahd_initiator_tinfo *tinfo
2513 = ahd_fetch_transinfo(ahd,
2514 starget->channel + 'A',
2515 shost->this_id, starget->id, &tstate);
2516 struct ahd_devinfo devinfo;
2517 unsigned int ppr_options = tinfo->goal.ppr_options
2518 & ~MSG_EXT_PPR_DT_REQ;
2519 unsigned int period = tinfo->goal.period;
2520 unsigned int width = tinfo->goal.width;
2521 unsigned long flags;
2522
2523 #ifdef AHD_DEBUG
2524 if ((ahd_debug & AHD_SHOW_DV) != 0)
2525 printk("%s: %s DT\n", ahd_name(ahd),
2526 dt ? "enabling" : "disabling");
2527 #endif
2528 if (dt && spi_max_width(starget)) {
2529 ppr_options |= MSG_EXT_PPR_DT_REQ;
2530 if (!width)
2531 ahd_linux_set_width(starget, 1);
2532 } else {
2533 if (period <= 9)
2534 period = 10; /* If resetting DT, period must be >= 25ns */
2535 /* IU is invalid without DT set */
2536 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2537 }
2538 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2539 starget->channel + 'A', ROLE_INITIATOR);
2540 ahd_find_syncrate(ahd, &period, &ppr_options,
2541 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2542
2543 ahd_lock(ahd, &flags);
2544 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2545 ppr_options, AHD_TRANS_GOAL, FALSE);
2546 ahd_unlock(ahd, &flags);
2547 }
2548
2549 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2550 {
2551 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2552 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2553 struct ahd_tmode_tstate *tstate;
2554 struct ahd_initiator_tinfo *tinfo
2555 = ahd_fetch_transinfo(ahd,
2556 starget->channel + 'A',
2557 shost->this_id, starget->id, &tstate);
2558 struct ahd_devinfo devinfo;
2559 unsigned int ppr_options = tinfo->goal.ppr_options
2560 & ~MSG_EXT_PPR_QAS_REQ;
2561 unsigned int period = tinfo->goal.period;
2562 unsigned int dt;
2563 unsigned long flags;
2564
2565 #ifdef AHD_DEBUG
2566 if ((ahd_debug & AHD_SHOW_DV) != 0)
2567 printk("%s: %s QAS\n", ahd_name(ahd),
2568 qas ? "enabling" : "disabling");
2569 #endif
2570
2571 if (qas) {
2572 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2573 }
2574
2575 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2576
2577 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2578 starget->channel + 'A', ROLE_INITIATOR);
2579 ahd_find_syncrate(ahd, &period, &ppr_options,
2580 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2581
2582 ahd_lock(ahd, &flags);
2583 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2584 ppr_options, AHD_TRANS_GOAL, FALSE);
2585 ahd_unlock(ahd, &flags);
2586 }
2587
2588 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2589 {
2590 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2591 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2592 struct ahd_tmode_tstate *tstate;
2593 struct ahd_initiator_tinfo *tinfo
2594 = ahd_fetch_transinfo(ahd,
2595 starget->channel + 'A',
2596 shost->this_id, starget->id, &tstate);
2597 struct ahd_devinfo devinfo;
2598 unsigned int ppr_options = tinfo->goal.ppr_options
2599 & ~MSG_EXT_PPR_IU_REQ;
2600 unsigned int period = tinfo->goal.period;
2601 unsigned int dt;
2602 unsigned long flags;
2603
2604 #ifdef AHD_DEBUG
2605 if ((ahd_debug & AHD_SHOW_DV) != 0)
2606 printk("%s: %s IU\n", ahd_name(ahd),
2607 iu ? "enabling" : "disabling");
2608 #endif
2609
2610 if (iu && spi_max_width(starget)) {
2611 ppr_options |= MSG_EXT_PPR_IU_REQ;
2612 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2613 }
2614
2615 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2616
2617 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2618 starget->channel + 'A', ROLE_INITIATOR);
2619 ahd_find_syncrate(ahd, &period, &ppr_options,
2620 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2621
2622 ahd_lock(ahd, &flags);
2623 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2624 ppr_options, AHD_TRANS_GOAL, FALSE);
2625 ahd_unlock(ahd, &flags);
2626 }
2627
2628 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2629 {
2630 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2631 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2632 struct ahd_tmode_tstate *tstate;
2633 struct ahd_initiator_tinfo *tinfo
2634 = ahd_fetch_transinfo(ahd,
2635 starget->channel + 'A',
2636 shost->this_id, starget->id, &tstate);
2637 struct ahd_devinfo devinfo;
2638 unsigned int ppr_options = tinfo->goal.ppr_options
2639 & ~MSG_EXT_PPR_RD_STRM;
2640 unsigned int period = tinfo->goal.period;
2641 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2642 unsigned long flags;
2643
2644 #ifdef AHD_DEBUG
2645 if ((ahd_debug & AHD_SHOW_DV) != 0)
2646 printk("%s: %s Read Streaming\n", ahd_name(ahd),
2647 rdstrm ? "enabling" : "disabling");
2648 #endif
2649
2650 if (rdstrm && spi_max_width(starget))
2651 ppr_options |= MSG_EXT_PPR_RD_STRM;
2652
2653 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2654 starget->channel + 'A', ROLE_INITIATOR);
2655 ahd_find_syncrate(ahd, &period, &ppr_options,
2656 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2657
2658 ahd_lock(ahd, &flags);
2659 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2660 ppr_options, AHD_TRANS_GOAL, FALSE);
2661 ahd_unlock(ahd, &flags);
2662 }
2663
2664 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2665 {
2666 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2667 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2668 struct ahd_tmode_tstate *tstate;
2669 struct ahd_initiator_tinfo *tinfo
2670 = ahd_fetch_transinfo(ahd,
2671 starget->channel + 'A',
2672 shost->this_id, starget->id, &tstate);
2673 struct ahd_devinfo devinfo;
2674 unsigned int ppr_options = tinfo->goal.ppr_options
2675 & ~MSG_EXT_PPR_WR_FLOW;
2676 unsigned int period = tinfo->goal.period;
2677 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2678 unsigned long flags;
2679
2680 #ifdef AHD_DEBUG
2681 if ((ahd_debug & AHD_SHOW_DV) != 0)
2682 printk("%s: %s Write Flow Control\n", ahd_name(ahd),
2683 wrflow ? "enabling" : "disabling");
2684 #endif
2685
2686 if (wrflow && spi_max_width(starget))
2687 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2688
2689 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2690 starget->channel + 'A', ROLE_INITIATOR);
2691 ahd_find_syncrate(ahd, &period, &ppr_options,
2692 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2693
2694 ahd_lock(ahd, &flags);
2695 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2696 ppr_options, AHD_TRANS_GOAL, FALSE);
2697 ahd_unlock(ahd, &flags);
2698 }
2699
2700 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2701 {
2702 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2703 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2704 struct ahd_tmode_tstate *tstate;
2705 struct ahd_initiator_tinfo *tinfo
2706 = ahd_fetch_transinfo(ahd,
2707 starget->channel + 'A',
2708 shost->this_id, starget->id, &tstate);
2709 struct ahd_devinfo devinfo;
2710 unsigned int ppr_options = tinfo->goal.ppr_options
2711 & ~MSG_EXT_PPR_RTI;
2712 unsigned int period = tinfo->goal.period;
2713 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2714 unsigned long flags;
2715
2716 if ((ahd->features & AHD_RTI) == 0) {
2717 #ifdef AHD_DEBUG
2718 if ((ahd_debug & AHD_SHOW_DV) != 0)
2719 printk("%s: RTI not available\n", ahd_name(ahd));
2720 #endif
2721 return;
2722 }
2723
2724 #ifdef AHD_DEBUG
2725 if ((ahd_debug & AHD_SHOW_DV) != 0)
2726 printk("%s: %s RTI\n", ahd_name(ahd),
2727 rti ? "enabling" : "disabling");
2728 #endif
2729
2730 if (rti && spi_max_width(starget))
2731 ppr_options |= MSG_EXT_PPR_RTI;
2732
2733 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2734 starget->channel + 'A', ROLE_INITIATOR);
2735 ahd_find_syncrate(ahd, &period, &ppr_options,
2736 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2737
2738 ahd_lock(ahd, &flags);
2739 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2740 ppr_options, AHD_TRANS_GOAL, FALSE);
2741 ahd_unlock(ahd, &flags);
2742 }
2743
2744 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2745 {
2746 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2747 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2748 struct ahd_tmode_tstate *tstate;
2749 struct ahd_initiator_tinfo *tinfo
2750 = ahd_fetch_transinfo(ahd,
2751 starget->channel + 'A',
2752 shost->this_id, starget->id, &tstate);
2753 struct ahd_devinfo devinfo;
2754 unsigned int ppr_options = tinfo->goal.ppr_options
2755 & ~MSG_EXT_PPR_PCOMP_EN;
2756 unsigned int period = tinfo->goal.period;
2757 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2758 unsigned long flags;
2759
2760 #ifdef AHD_DEBUG
2761 if ((ahd_debug & AHD_SHOW_DV) != 0)
2762 printk("%s: %s Precompensation\n", ahd_name(ahd),
2763 pcomp ? "Enable" : "Disable");
2764 #endif
2765
2766 if (pcomp && spi_max_width(starget)) {
2767 uint8_t precomp;
2768
2769 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2770 const struct ahd_linux_iocell_opts *iocell_opts;
2771
2772 iocell_opts = &aic79xx_iocell_info[ahd->unit];
2773 precomp = iocell_opts->precomp;
2774 } else {
2775 precomp = AIC79XX_DEFAULT_PRECOMP;
2776 }
2777 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2778 AHD_SET_PRECOMP(ahd, precomp);
2779 } else {
2780 AHD_SET_PRECOMP(ahd, 0);
2781 }
2782
2783 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2784 starget->channel + 'A', ROLE_INITIATOR);
2785 ahd_find_syncrate(ahd, &period, &ppr_options,
2786 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2787
2788 ahd_lock(ahd, &flags);
2789 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2790 ppr_options, AHD_TRANS_GOAL, FALSE);
2791 ahd_unlock(ahd, &flags);
2792 }
2793
2794 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2795 {
2796 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2797 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2798 struct ahd_tmode_tstate *tstate;
2799 struct ahd_initiator_tinfo *tinfo
2800 = ahd_fetch_transinfo(ahd,
2801 starget->channel + 'A',
2802 shost->this_id, starget->id, &tstate);
2803 struct ahd_devinfo devinfo;
2804 unsigned int ppr_options = tinfo->goal.ppr_options
2805 & ~MSG_EXT_PPR_HOLD_MCS;
2806 unsigned int period = tinfo->goal.period;
2807 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2808 unsigned long flags;
2809
2810 if (hold && spi_max_width(starget))
2811 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2812
2813 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2814 starget->channel + 'A', ROLE_INITIATOR);
2815 ahd_find_syncrate(ahd, &period, &ppr_options,
2816 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2817
2818 ahd_lock(ahd, &flags);
2819 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2820 ppr_options, AHD_TRANS_GOAL, FALSE);
2821 ahd_unlock(ahd, &flags);
2822 }
2823
2824 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2825 {
2826 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2827 unsigned long flags;
2828 u8 mode;
2829
2830 ahd_lock(ahd, &flags);
2831 ahd_pause(ahd);
2832 mode = ahd_inb(ahd, SBLKCTL);
2833 ahd_unpause(ahd);
2834 ahd_unlock(ahd, &flags);
2835
2836 if (mode & ENAB40)
2837 spi_signalling(shost) = SPI_SIGNAL_LVD;
2838 else if (mode & ENAB20)
2839 spi_signalling(shost) = SPI_SIGNAL_SE;
2840 else
2841 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2842 }
2843
2844 static struct spi_function_template ahd_linux_transport_functions = {
2845 .set_offset = ahd_linux_set_offset,
2846 .show_offset = 1,
2847 .set_period = ahd_linux_set_period,
2848 .show_period = 1,
2849 .set_width = ahd_linux_set_width,
2850 .show_width = 1,
2851 .set_dt = ahd_linux_set_dt,
2852 .show_dt = 1,
2853 .set_iu = ahd_linux_set_iu,
2854 .show_iu = 1,
2855 .set_qas = ahd_linux_set_qas,
2856 .show_qas = 1,
2857 .set_rd_strm = ahd_linux_set_rd_strm,
2858 .show_rd_strm = 1,
2859 .set_wr_flow = ahd_linux_set_wr_flow,
2860 .show_wr_flow = 1,
2861 .set_rti = ahd_linux_set_rti,
2862 .show_rti = 1,
2863 .set_pcomp_en = ahd_linux_set_pcomp_en,
2864 .show_pcomp_en = 1,
2865 .set_hold_mcs = ahd_linux_set_hold_mcs,
2866 .show_hold_mcs = 1,
2867 .get_signalling = ahd_linux_get_signalling,
2868 };
2869
2870 static int __init
2871 ahd_linux_init(void)
2872 {
2873 int error = 0;
2874
2875 /*
2876 * If we've been passed any parameters, process them now.
2877 */
2878 if (aic79xx)
2879 aic79xx_setup(aic79xx);
2880
2881 ahd_linux_transport_template =
2882 spi_attach_transport(&ahd_linux_transport_functions);
2883 if (!ahd_linux_transport_template)
2884 return -ENODEV;
2885
2886 scsi_transport_reserve_device(ahd_linux_transport_template,
2887 sizeof(struct ahd_linux_device));
2888
2889 error = ahd_linux_pci_init();
2890 if (error)
2891 spi_release_transport(ahd_linux_transport_template);
2892 return error;
2893 }
2894
2895 static void __exit
2896 ahd_linux_exit(void)
2897 {
2898 ahd_linux_pci_exit();
2899 spi_release_transport(ahd_linux_transport_template);
2900 }
2901
2902 module_init(ahd_linux_init);
2903 module_exit(ahd_linux_exit);