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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / scsi / aic7xxx / aic79xx_osm.c
blob69d5c43a65e590e8b91651e29447bd2282837ad5
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 modprobe configuration file:\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 .show_info = ahd_linux_show_info,
910 .write_info = ahd_proc_write_seeprom,
911 .info = ahd_linux_info,
912 .queuecommand = ahd_linux_queue,
913 .eh_abort_handler = ahd_linux_abort,
914 .eh_device_reset_handler = ahd_linux_dev_reset,
915 .eh_bus_reset_handler = ahd_linux_bus_reset,
916 #if defined(__i386__)
917 .bios_param = ahd_linux_biosparam,
918 #endif
919 .can_queue = AHD_MAX_QUEUE,
920 .this_id = -1,
921 .max_sectors = 8192,
922 .cmd_per_lun = 2,
923 .use_clustering = ENABLE_CLUSTERING,
924 .slave_alloc = ahd_linux_slave_alloc,
925 .slave_configure = ahd_linux_slave_configure,
926 .target_alloc = ahd_linux_target_alloc,
927 .target_destroy = ahd_linux_target_destroy,
928 };
929
930 /******************************** Bus DMA *************************************/
931 int
932 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
933 bus_size_t alignment, bus_size_t boundary,
934 dma_addr_t lowaddr, dma_addr_t highaddr,
935 bus_dma_filter_t *filter, void *filterarg,
936 bus_size_t maxsize, int nsegments,
937 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
938 {
939 bus_dma_tag_t dmat;
940
941 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
942 if (dmat == NULL)
943 return (ENOMEM);
944
945 /*
946 * Linux is very simplistic about DMA memory. For now don't
947 * maintain all specification information. Once Linux supplies
948 * better facilities for doing these operations, or the
949 * needs of this particular driver change, we might need to do
950 * more here.
951 */
952 dmat->alignment = alignment;
953 dmat->boundary = boundary;
954 dmat->maxsize = maxsize;
955 *ret_tag = dmat;
956 return (0);
957 }
958
959 void
960 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
961 {
962 kfree(dmat);
963 }
964
965 int
966 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
967 int flags, bus_dmamap_t *mapp)
968 {
969 *vaddr = pci_alloc_consistent(ahd->dev_softc,
970 dmat->maxsize, mapp);
971 if (*vaddr == NULL)
972 return (ENOMEM);
973 return(0);
974 }
975
976 void
977 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
978 void* vaddr, bus_dmamap_t map)
979 {
980 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
981 vaddr, map);
982 }
983
984 int
985 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
986 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
987 void *cb_arg, int flags)
988 {
989 /*
990 * Assume for now that this will only be used during
991 * initialization and not for per-transaction buffer mapping.
992 */
993 bus_dma_segment_t stack_sg;
994
995 stack_sg.ds_addr = map;
996 stack_sg.ds_len = dmat->maxsize;
997 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
998 return (0);
999 }
1000
1001 void
1002 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1003 {
1004 }
1005
1006 int
1007 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1008 {
1009 /* Nothing to do */
1010 return (0);
1011 }
1012
1013 /********************* Platform Dependent Functions ***************************/
1014 static void
1015 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
1016 {
1017
1018 if ((instance >= 0)
1019 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
1020 uint8_t *iocell_info;
1021
1022 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1023 iocell_info[index] = value & 0xFFFF;
1024 if (bootverbose)
1025 printk("iocell[%d:%ld] = %d\n", instance, index, value);
1026 }
1027 }
1028
1029 static void
1030 ahd_linux_setup_tag_info_global(char *p)
1031 {
1032 int tags, i, j;
1033
1034 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1035 printk("Setting Global Tags= %d\n", tags);
1036
1037 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
1038 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1039 aic79xx_tag_info[i].tag_commands[j] = tags;
1040 }
1041 }
1042 }
1043
1044 static void
1045 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1046 {
1047
1048 if ((instance >= 0) && (targ >= 0)
1049 && (instance < ARRAY_SIZE(aic79xx_tag_info))
1050 && (targ < AHD_NUM_TARGETS)) {
1051 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1052 if (bootverbose)
1053 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
1054 }
1055 }
1056
1057 static char *
1058 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
1059 void (*callback)(u_long, int, int, int32_t),
1060 u_long callback_arg)
1061 {
1062 char *tok_end;
1063 char *tok_end2;
1064 int i;
1065 int instance;
1066 int targ;
1067 int done;
1068 char tok_list[] = {'.', ',', '{', '}', '\0'};
1069
1070 /* All options use a ':' name/arg separator */
1071 if (*opt_arg != ':')
1072 return (opt_arg);
1073 opt_arg++;
1074 instance = -1;
1075 targ = -1;
1076 done = FALSE;
1077 /*
1078 * Restore separator that may be in
1079 * the middle of our option argument.
1080 */
1081 tok_end = strchr(opt_arg, '\0');
1082 if (tok_end < end)
1083 *tok_end = ',';
1084 while (!done) {
1085 switch (*opt_arg) {
1086 case '{':
1087 if (instance == -1) {
1088 instance = 0;
1089 } else {
1090 if (depth > 1) {
1091 if (targ == -1)
1092 targ = 0;
1093 } else {
1094 printk("Malformed Option %s\n",
1095 opt_name);
1096 done = TRUE;
1097 }
1098 }
1099 opt_arg++;
1100 break;
1101 case '}':
1102 if (targ != -1)
1103 targ = -1;
1104 else if (instance != -1)
1105 instance = -1;
1106 opt_arg++;
1107 break;
1108 case ',':
1109 case '.':
1110 if (instance == -1)
1111 done = TRUE;
1112 else if (targ >= 0)
1113 targ++;
1114 else if (instance >= 0)
1115 instance++;
1116 opt_arg++;
1117 break;
1118 case '\0':
1119 done = TRUE;
1120 break;
1121 default:
1122 tok_end = end;
1123 for (i = 0; tok_list[i]; i++) {
1124 tok_end2 = strchr(opt_arg, tok_list[i]);
1125 if ((tok_end2) && (tok_end2 < tok_end))
1126 tok_end = tok_end2;
1127 }
1128 callback(callback_arg, instance, targ,
1129 simple_strtol(opt_arg, NULL, 0));
1130 opt_arg = tok_end;
1131 break;
1132 }
1133 }
1134 return (opt_arg);
1135 }
1136
1137 /*
1138 * Handle Linux boot parameters. This routine allows for assigning a value
1139 * to a parameter with a ':' between the parameter and the value.
1140 * ie. aic79xx=stpwlev:1,extended
1141 */
1142 static int
1143 aic79xx_setup(char *s)
1144 {
1145 int i, n;
1146 char *p;
1147 char *end;
1148
1149 static const struct {
1150 const char *name;
1151 uint32_t *flag;
1152 } options[] = {
1153 { "extended", &aic79xx_extended },
1154 { "no_reset", &aic79xx_no_reset },
1155 { "verbose", &aic79xx_verbose },
1156 { "allow_memio", &aic79xx_allow_memio},
1157 #ifdef AHD_DEBUG
1158 { "debug", &ahd_debug },
1159 #endif
1160 { "periodic_otag", &aic79xx_periodic_otag },
1161 { "pci_parity", &aic79xx_pci_parity },
1162 { "seltime", &aic79xx_seltime },
1163 { "tag_info", NULL },
1164 { "global_tag_depth", NULL},
1165 { "slewrate", NULL },
1166 { "precomp", NULL },
1167 { "amplitude", NULL },
1168 { "slowcrc", &aic79xx_slowcrc },
1169 };
1170
1171 end = strchr(s, '\0');
1172
1173 /*
1174 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1175 * will never be 0 in this case.
1176 */
1177 n = 0;
1178
1179 while ((p = strsep(&s, ",.")) != NULL) {
1180 if (*p == '\0')
1181 continue;
1182 for (i = 0; i < ARRAY_SIZE(options); i++) {
1183
1184 n = strlen(options[i].name);
1185 if (strncmp(options[i].name, p, n) == 0)
1186 break;
1187 }
1188 if (i == ARRAY_SIZE(options))
1189 continue;
1190
1191 if (strncmp(p, "global_tag_depth", n) == 0) {
1192 ahd_linux_setup_tag_info_global(p + n);
1193 } else if (strncmp(p, "tag_info", n) == 0) {
1194 s = ahd_parse_brace_option("tag_info", p + n, end,
1195 2, ahd_linux_setup_tag_info, 0);
1196 } else if (strncmp(p, "slewrate", n) == 0) {
1197 s = ahd_parse_brace_option("slewrate",
1198 p + n, end, 1, ahd_linux_setup_iocell_info,
1199 AIC79XX_SLEWRATE_INDEX);
1200 } else if (strncmp(p, "precomp", n) == 0) {
1201 s = ahd_parse_brace_option("precomp",
1202 p + n, end, 1, ahd_linux_setup_iocell_info,
1203 AIC79XX_PRECOMP_INDEX);
1204 } else if (strncmp(p, "amplitude", n) == 0) {
1205 s = ahd_parse_brace_option("amplitude",
1206 p + n, end, 1, ahd_linux_setup_iocell_info,
1207 AIC79XX_AMPLITUDE_INDEX);
1208 } else if (p[n] == ':') {
1209 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1210 } else if (!strncmp(p, "verbose", n)) {
1211 *(options[i].flag) = 1;
1212 } else {
1213 *(options[i].flag) ^= 0xFFFFFFFF;
1214 }
1215 }
1216 return 1;
1217 }
1218
1219 __setup("aic79xx=", aic79xx_setup);
1220
1221 uint32_t aic79xx_verbose;
1222
1223 int
1224 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1225 {
1226 char buf[80];
1227 struct Scsi_Host *host;
1228 char *new_name;
1229 u_long s;
1230 int retval;
1231
1232 template->name = ahd->description;
1233 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1234 if (host == NULL)
1235 return (ENOMEM);
1236
1237 *((struct ahd_softc **)host->hostdata) = ahd;
1238 ahd->platform_data->host = host;
1239 host->can_queue = AHD_MAX_QUEUE;
1240 host->cmd_per_lun = 2;
1241 host->sg_tablesize = AHD_NSEG;
1242 host->this_id = ahd->our_id;
1243 host->irq = ahd->platform_data->irq;
1244 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1245 host->max_lun = AHD_NUM_LUNS;
1246 host->max_channel = 0;
1247 host->sg_tablesize = AHD_NSEG;
1248 ahd_lock(ahd, &s);
1249 ahd_set_unit(ahd, ahd_linux_unit++);
1250 ahd_unlock(ahd, &s);
1251 sprintf(buf, "scsi%d", host->host_no);
1252 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1253 if (new_name != NULL) {
1254 strcpy(new_name, buf);
1255 ahd_set_name(ahd, new_name);
1256 }
1257 host->unique_id = ahd->unit;
1258 ahd_linux_initialize_scsi_bus(ahd);
1259 ahd_intr_enable(ahd, TRUE);
1260
1261 host->transportt = ahd_linux_transport_template;
1262
1263 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1264 if (retval) {
1265 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1266 scsi_host_put(host);
1267 return retval;
1268 }
1269
1270 scsi_scan_host(host);
1271 return 0;
1272 }
1273
1274 /*
1275 * Place the SCSI bus into a known state by either resetting it,
1276 * or forcing transfer negotiations on the next command to any
1277 * target.
1278 */
1279 static void
1280 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1281 {
1282 u_int target_id;
1283 u_int numtarg;
1284 unsigned long s;
1285
1286 target_id = 0;
1287 numtarg = 0;
1288
1289 if (aic79xx_no_reset != 0)
1290 ahd->flags &= ~AHD_RESET_BUS_A;
1291
1292 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1293 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1294 else
1295 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1296
1297 ahd_lock(ahd, &s);
1298
1299 /*
1300 * Force negotiation to async for all targets that
1301 * will not see an initial bus reset.
1302 */
1303 for (; target_id < numtarg; target_id++) {
1304 struct ahd_devinfo devinfo;
1305 struct ahd_initiator_tinfo *tinfo;
1306 struct ahd_tmode_tstate *tstate;
1307
1308 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1309 target_id, &tstate);
1310 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1311 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1312 ahd_update_neg_request(ahd, &devinfo, tstate,
1313 tinfo, AHD_NEG_ALWAYS);
1314 }
1315 ahd_unlock(ahd, &s);
1316 /* Give the bus some time to recover */
1317 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1318 ahd_freeze_simq(ahd);
1319 msleep(AIC79XX_RESET_DELAY);
1320 ahd_release_simq(ahd);
1321 }
1322 }
1323
1324 int
1325 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1326 {
1327 ahd->platform_data =
1328 kmalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC);
1329 if (ahd->platform_data == NULL)
1330 return (ENOMEM);
1331 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1332 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1333 ahd_lockinit(ahd);
1334 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1335 return (0);
1336 }
1337
1338 void
1339 ahd_platform_free(struct ahd_softc *ahd)
1340 {
1341 struct scsi_target *starget;
1342 int i;
1343
1344 if (ahd->platform_data != NULL) {
1345 /* destroy all of the device and target objects */
1346 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1347 starget = ahd->platform_data->starget[i];
1348 if (starget != NULL) {
1349 ahd->platform_data->starget[i] = NULL;
1350 }
1351 }
1352
1353 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1354 free_irq(ahd->platform_data->irq, ahd);
1355 if (ahd->tags[0] == BUS_SPACE_PIO
1356 && ahd->bshs[0].ioport != 0)
1357 release_region(ahd->bshs[0].ioport, 256);
1358 if (ahd->tags[1] == BUS_SPACE_PIO
1359 && ahd->bshs[1].ioport != 0)
1360 release_region(ahd->bshs[1].ioport, 256);
1361 if (ahd->tags[0] == BUS_SPACE_MEMIO
1362 && ahd->bshs[0].maddr != NULL) {
1363 iounmap(ahd->bshs[0].maddr);
1364 release_mem_region(ahd->platform_data->mem_busaddr,
1365 0x1000);
1366 }
1367 if (ahd->platform_data->host)
1368 scsi_host_put(ahd->platform_data->host);
1369
1370 kfree(ahd->platform_data);
1371 }
1372 }
1373
1374 void
1375 ahd_platform_init(struct ahd_softc *ahd)
1376 {
1377 /*
1378 * Lookup and commit any modified IO Cell options.
1379 */
1380 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1381 const struct ahd_linux_iocell_opts *iocell_opts;
1382
1383 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1384 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1385 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1386 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1387 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1388 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1389 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1390 }
1391
1392 }
1393
1394 void
1395 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1396 {
1397 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1398 SCB_GET_CHANNEL(ahd, scb),
1399 SCB_GET_LUN(scb), SCB_LIST_NULL,
1400 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1401 }
1402
1403 void
1404 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1405 struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1406 {
1407 struct ahd_linux_device *dev;
1408 int was_queuing;
1409 int now_queuing;
1410
1411 if (sdev == NULL)
1412 return;
1413
1414 dev = scsi_transport_device_data(sdev);
1415
1416 if (dev == NULL)
1417 return;
1418 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1419 switch (alg) {
1420 default:
1421 case AHD_QUEUE_NONE:
1422 now_queuing = 0;
1423 break;
1424 case AHD_QUEUE_BASIC:
1425 now_queuing = AHD_DEV_Q_BASIC;
1426 break;
1427 case AHD_QUEUE_TAGGED:
1428 now_queuing = AHD_DEV_Q_TAGGED;
1429 break;
1430 }
1431 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1432 && (was_queuing != now_queuing)
1433 && (dev->active != 0)) {
1434 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1435 dev->qfrozen++;
1436 }
1437
1438 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1439 if (now_queuing) {
1440 u_int usertags;
1441
1442 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1443 if (!was_queuing) {
1444 /*
1445 * Start out aggressively and allow our
1446 * dynamic queue depth algorithm to take
1447 * care of the rest.
1448 */
1449 dev->maxtags = usertags;
1450 dev->openings = dev->maxtags - dev->active;
1451 }
1452 if (dev->maxtags == 0) {
1453 /*
1454 * Queueing is disabled by the user.
1455 */
1456 dev->openings = 1;
1457 } else if (alg == AHD_QUEUE_TAGGED) {
1458 dev->flags |= AHD_DEV_Q_TAGGED;
1459 if (aic79xx_periodic_otag != 0)
1460 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1461 } else
1462 dev->flags |= AHD_DEV_Q_BASIC;
1463 } else {
1464 /* We can only have one opening. */
1465 dev->maxtags = 0;
1466 dev->openings = 1 - dev->active;
1467 }
1468
1469 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1470 case AHD_DEV_Q_BASIC:
1471 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1472 scsi_activate_tcq(sdev, dev->openings + dev->active);
1473 break;
1474 case AHD_DEV_Q_TAGGED:
1475 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1476 scsi_activate_tcq(sdev, dev->openings + dev->active);
1477 break;
1478 default:
1479 /*
1480 * We allow the OS to queue 2 untagged transactions to
1481 * us at any time even though we can only execute them
1482 * serially on the controller/device. This should
1483 * remove some latency.
1484 */
1485 scsi_deactivate_tcq(sdev, 1);
1486 break;
1487 }
1488 }
1489
1490 int
1491 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1492 int lun, u_int tag, role_t role, uint32_t status)
1493 {
1494 return 0;
1495 }
1496
1497 static u_int
1498 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1499 {
1500 static int warned_user;
1501 u_int tags;
1502
1503 tags = 0;
1504 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1505 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1506
1507 if (warned_user == 0) {
1508 printk(KERN_WARNING
1509 "aic79xx: WARNING: Insufficient tag_info instances\n"
1510 "aic79xx: for installed controllers. Using defaults\n"
1511 "aic79xx: Please update the aic79xx_tag_info array in\n"
1512 "aic79xx: the aic79xx_osm.c source file.\n");
1513 warned_user++;
1514 }
1515 tags = AHD_MAX_QUEUE;
1516 } else {
1517 adapter_tag_info_t *tag_info;
1518
1519 tag_info = &aic79xx_tag_info[ahd->unit];
1520 tags = tag_info->tag_commands[devinfo->target_offset];
1521 if (tags > AHD_MAX_QUEUE)
1522 tags = AHD_MAX_QUEUE;
1523 }
1524 }
1525 return (tags);
1526 }
1527
1528 /*
1529 * Determines the queue depth for a given device.
1530 */
1531 static void
1532 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1533 {
1534 struct ahd_devinfo devinfo;
1535 u_int tags;
1536 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1537
1538 ahd_compile_devinfo(&devinfo,
1539 ahd->our_id,
1540 sdev->sdev_target->id, sdev->lun,
1541 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1542 ROLE_INITIATOR);
1543 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1544 if (tags != 0 && sdev->tagged_supported != 0) {
1545
1546 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1547 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1548 devinfo.lun, AC_TRANSFER_NEG);
1549 ahd_print_devinfo(ahd, &devinfo);
1550 printk("Tagged Queuing enabled. Depth %d\n", tags);
1551 } else {
1552 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1553 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1554 devinfo.lun, AC_TRANSFER_NEG);
1555 }
1556 }
1557
1558 static int
1559 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1560 struct scsi_cmnd *cmd)
1561 {
1562 struct scb *scb;
1563 struct hardware_scb *hscb;
1564 struct ahd_initiator_tinfo *tinfo;
1565 struct ahd_tmode_tstate *tstate;
1566 u_int col_idx;
1567 uint16_t mask;
1568 unsigned long flags;
1569 int nseg;
1570
1571 nseg = scsi_dma_map(cmd);
1572 if (nseg < 0)
1573 return SCSI_MLQUEUE_HOST_BUSY;
1574
1575 ahd_lock(ahd, &flags);
1576
1577 /*
1578 * Get an scb to use.
1579 */
1580 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1581 cmd->device->id, &tstate);
1582 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1583 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1584 col_idx = AHD_NEVER_COL_IDX;
1585 } else {
1586 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1587 cmd->device->lun);
1588 }
1589 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1590 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1591 ahd_unlock(ahd, &flags);
1592 scsi_dma_unmap(cmd);
1593 return SCSI_MLQUEUE_HOST_BUSY;
1594 }
1595
1596 scb->io_ctx = cmd;
1597 scb->platform_data->dev = dev;
1598 hscb = scb->hscb;
1599 cmd->host_scribble = (char *)scb;
1600
1601 /*
1602 * Fill out basics of the HSCB.
1603 */
1604 hscb->control = 0;
1605 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1606 hscb->lun = cmd->device->lun;
1607 scb->hscb->task_management = 0;
1608 mask = SCB_GET_TARGET_MASK(ahd, scb);
1609
1610 if ((ahd->user_discenable & mask) != 0)
1611 hscb->control |= DISCENB;
1612
1613 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1614 scb->flags |= SCB_PACKETIZED;
1615
1616 if ((tstate->auto_negotiate & mask) != 0) {
1617 scb->flags |= SCB_AUTO_NEGOTIATE;
1618 scb->hscb->control |= MK_MESSAGE;
1619 }
1620
1621 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1622 int msg_bytes;
1623 uint8_t tag_msgs[2];
1624
1625 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1626 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1627 hscb->control |= tag_msgs[0];
1628 if (tag_msgs[0] == MSG_ORDERED_TASK)
1629 dev->commands_since_idle_or_otag = 0;
1630 } else
1631 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1632 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1633 hscb->control |= MSG_ORDERED_TASK;
1634 dev->commands_since_idle_or_otag = 0;
1635 } else {
1636 hscb->control |= MSG_SIMPLE_TASK;
1637 }
1638 }
1639
1640 hscb->cdb_len = cmd->cmd_len;
1641 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1642
1643 scb->platform_data->xfer_len = 0;
1644 ahd_set_residual(scb, 0);
1645 ahd_set_sense_residual(scb, 0);
1646 scb->sg_count = 0;
1647
1648 if (nseg > 0) {
1649 void *sg = scb->sg_list;
1650 struct scatterlist *cur_seg;
1651 int i;
1652
1653 scb->platform_data->xfer_len = 0;
1654
1655 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1656 dma_addr_t addr;
1657 bus_size_t len;
1658
1659 addr = sg_dma_address(cur_seg);
1660 len = sg_dma_len(cur_seg);
1661 scb->platform_data->xfer_len += len;
1662 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1663 i == (nseg - 1));
1664 }
1665 }
1666
1667 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1668 dev->openings--;
1669 dev->active++;
1670 dev->commands_issued++;
1671
1672 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1673 dev->commands_since_idle_or_otag++;
1674 scb->flags |= SCB_ACTIVE;
1675 ahd_queue_scb(ahd, scb);
1676
1677 ahd_unlock(ahd, &flags);
1678
1679 return 0;
1680 }
1681
1682 /*
1683 * SCSI controller interrupt handler.
1684 */
1685 irqreturn_t
1686 ahd_linux_isr(int irq, void *dev_id)
1687 {
1688 struct ahd_softc *ahd;
1689 u_long flags;
1690 int ours;
1691
1692 ahd = (struct ahd_softc *) dev_id;
1693 ahd_lock(ahd, &flags);
1694 ours = ahd_intr(ahd);
1695 ahd_unlock(ahd, &flags);
1696 return IRQ_RETVAL(ours);
1697 }
1698
1699 void
1700 ahd_send_async(struct ahd_softc *ahd, char channel,
1701 u_int target, u_int lun, ac_code code)
1702 {
1703 switch (code) {
1704 case AC_TRANSFER_NEG:
1705 {
1706 struct scsi_target *starget;
1707 struct ahd_initiator_tinfo *tinfo;
1708 struct ahd_tmode_tstate *tstate;
1709 unsigned int target_ppr_options;
1710
1711 BUG_ON(target == CAM_TARGET_WILDCARD);
1712
1713 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1714 target, &tstate);
1715
1716 /*
1717 * Don't bother reporting results while
1718 * negotiations are still pending.
1719 */
1720 if (tinfo->curr.period != tinfo->goal.period
1721 || tinfo->curr.width != tinfo->goal.width
1722 || tinfo->curr.offset != tinfo->goal.offset
1723 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1724 if (bootverbose == 0)
1725 break;
1726
1727 /*
1728 * Don't bother reporting results that
1729 * are identical to those last reported.
1730 */
1731 starget = ahd->platform_data->starget[target];
1732 if (starget == NULL)
1733 break;
1734
1735 target_ppr_options =
1736 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1737 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1738 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1739 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1740 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1741 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1742 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1743 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1744
1745 if (tinfo->curr.period == spi_period(starget)
1746 && tinfo->curr.width == spi_width(starget)
1747 && tinfo->curr.offset == spi_offset(starget)
1748 && tinfo->curr.ppr_options == target_ppr_options)
1749 if (bootverbose == 0)
1750 break;
1751
1752 spi_period(starget) = tinfo->curr.period;
1753 spi_width(starget) = tinfo->curr.width;
1754 spi_offset(starget) = tinfo->curr.offset;
1755 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1756 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1757 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1758 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1759 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1760 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1761 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1762 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1763 spi_display_xfer_agreement(starget);
1764 break;
1765 }
1766 case AC_SENT_BDR:
1767 {
1768 WARN_ON(lun != CAM_LUN_WILDCARD);
1769 scsi_report_device_reset(ahd->platform_data->host,
1770 channel - 'A', target);
1771 break;
1772 }
1773 case AC_BUS_RESET:
1774 if (ahd->platform_data->host != NULL) {
1775 scsi_report_bus_reset(ahd->platform_data->host,
1776 channel - 'A');
1777 }
1778 break;
1779 default:
1780 panic("ahd_send_async: Unexpected async event");
1781 }
1782 }
1783
1784 /*
1785 * Calls the higher level scsi done function and frees the scb.
1786 */
1787 void
1788 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1789 {
1790 struct scsi_cmnd *cmd;
1791 struct ahd_linux_device *dev;
1792
1793 if ((scb->flags & SCB_ACTIVE) == 0) {
1794 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1795 ahd_dump_card_state(ahd);
1796 panic("Stopping for safety");
1797 }
1798 LIST_REMOVE(scb, pending_links);
1799 cmd = scb->io_ctx;
1800 dev = scb->platform_data->dev;
1801 dev->active--;
1802 dev->openings++;
1803 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1804 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1805 dev->qfrozen--;
1806 }
1807 ahd_linux_unmap_scb(ahd, scb);
1808
1809 /*
1810 * Guard against stale sense data.
1811 * The Linux mid-layer assumes that sense
1812 * was retrieved anytime the first byte of
1813 * the sense buffer looks "sane".
1814 */
1815 cmd->sense_buffer[0] = 0;
1816 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1817 uint32_t amount_xferred;
1818
1819 amount_xferred =
1820 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1821 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1822 #ifdef AHD_DEBUG
1823 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1824 ahd_print_path(ahd, scb);
1825 printk("Set CAM_UNCOR_PARITY\n");
1826 }
1827 #endif
1828 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1829 #ifdef AHD_REPORT_UNDERFLOWS
1830 /*
1831 * This code is disabled by default as some
1832 * clients of the SCSI system do not properly
1833 * initialize the underflow parameter. This
1834 * results in spurious termination of commands
1835 * that complete as expected (e.g. underflow is
1836 * allowed as command can return variable amounts
1837 * of data.
1838 */
1839 } else if (amount_xferred < scb->io_ctx->underflow) {
1840 u_int i;
1841
1842 ahd_print_path(ahd, scb);
1843 printk("CDB:");
1844 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1845 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1846 printk("\n");
1847 ahd_print_path(ahd, scb);
1848 printk("Saw underflow (%ld of %ld bytes). "
1849 "Treated as error\n",
1850 ahd_get_residual(scb),
1851 ahd_get_transfer_length(scb));
1852 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1853 #endif
1854 } else {
1855 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1856 }
1857 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1858 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1859 }
1860
1861 if (dev->openings == 1
1862 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1863 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1864 dev->tag_success_count++;
1865 /*
1866 * Some devices deal with temporary internal resource
1867 * shortages by returning queue full. When the queue
1868 * full occurrs, we throttle back. Slowly try to get
1869 * back to our previous queue depth.
1870 */
1871 if ((dev->openings + dev->active) < dev->maxtags
1872 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1873 dev->tag_success_count = 0;
1874 dev->openings++;
1875 }
1876
1877 if (dev->active == 0)
1878 dev->commands_since_idle_or_otag = 0;
1879
1880 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1881 printk("Recovery SCB completes\n");
1882 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1883 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1884 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1885
1886 if (ahd->platform_data->eh_done)
1887 complete(ahd->platform_data->eh_done);
1888 }
1889
1890 ahd_free_scb(ahd, scb);
1891 ahd_linux_queue_cmd_complete(ahd, cmd);
1892 }
1893
1894 static void
1895 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1896 struct scsi_device *sdev, struct scb *scb)
1897 {
1898 struct ahd_devinfo devinfo;
1899 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1900
1901 ahd_compile_devinfo(&devinfo,
1902 ahd->our_id,
1903 sdev->sdev_target->id, sdev->lun,
1904 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1905 ROLE_INITIATOR);
1906
1907 /*
1908 * We don't currently trust the mid-layer to
1909 * properly deal with queue full or busy. So,
1910 * when one occurs, we tell the mid-layer to
1911 * unconditionally requeue the command to us
1912 * so that we can retry it ourselves. We also
1913 * implement our own throttling mechanism so
1914 * we don't clobber the device with too many
1915 * commands.
1916 */
1917 switch (ahd_get_scsi_status(scb)) {
1918 default:
1919 break;
1920 case SCSI_STATUS_CHECK_COND:
1921 case SCSI_STATUS_CMD_TERMINATED:
1922 {
1923 struct scsi_cmnd *cmd;
1924
1925 /*
1926 * Copy sense information to the OS's cmd
1927 * structure if it is available.
1928 */
1929 cmd = scb->io_ctx;
1930 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1931 struct scsi_status_iu_header *siu;
1932 u_int sense_size;
1933 u_int sense_offset;
1934
1935 if (scb->flags & SCB_SENSE) {
1936 sense_size = min(sizeof(struct scsi_sense_data)
1937 - ahd_get_sense_residual(scb),
1938 (u_long)SCSI_SENSE_BUFFERSIZE);
1939 sense_offset = 0;
1940 } else {
1941 /*
1942 * Copy only the sense data into the provided
1943 * buffer.
1944 */
1945 siu = (struct scsi_status_iu_header *)
1946 scb->sense_data;
1947 sense_size = min_t(size_t,
1948 scsi_4btoul(siu->sense_length),
1949 SCSI_SENSE_BUFFERSIZE);
1950 sense_offset = SIU_SENSE_OFFSET(siu);
1951 }
1952
1953 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1954 memcpy(cmd->sense_buffer,
1955 ahd_get_sense_buf(ahd, scb)
1956 + sense_offset, sense_size);
1957 cmd->result |= (DRIVER_SENSE << 24);
1958
1959 #ifdef AHD_DEBUG
1960 if (ahd_debug & AHD_SHOW_SENSE) {
1961 int i;
1962
1963 printk("Copied %d bytes of sense data at %d:",
1964 sense_size, sense_offset);
1965 for (i = 0; i < sense_size; i++) {
1966 if ((i & 0xF) == 0)
1967 printk("\n");
1968 printk("0x%x ", cmd->sense_buffer[i]);
1969 }
1970 printk("\n");
1971 }
1972 #endif
1973 }
1974 break;
1975 }
1976 case SCSI_STATUS_QUEUE_FULL:
1977 /*
1978 * By the time the core driver has returned this
1979 * command, all other commands that were queued
1980 * to us but not the device have been returned.
1981 * This ensures that dev->active is equal to
1982 * the number of commands actually queued to
1983 * the device.
1984 */
1985 dev->tag_success_count = 0;
1986 if (dev->active != 0) {
1987 /*
1988 * Drop our opening count to the number
1989 * of commands currently outstanding.
1990 */
1991 dev->openings = 0;
1992 #ifdef AHD_DEBUG
1993 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1994 ahd_print_path(ahd, scb);
1995 printk("Dropping tag count to %d\n",
1996 dev->active);
1997 }
1998 #endif
1999 if (dev->active == dev->tags_on_last_queuefull) {
2000
2001 dev->last_queuefull_same_count++;
2002 /*
2003 * If we repeatedly see a queue full
2004 * at the same queue depth, this
2005 * device has a fixed number of tag
2006 * slots. Lock in this tag depth
2007 * so we stop seeing queue fulls from
2008 * this device.
2009 */
2010 if (dev->last_queuefull_same_count
2011 == AHD_LOCK_TAGS_COUNT) {
2012 dev->maxtags = dev->active;
2013 ahd_print_path(ahd, scb);
2014 printk("Locking max tag count at %d\n",
2015 dev->active);
2016 }
2017 } else {
2018 dev->tags_on_last_queuefull = dev->active;
2019 dev->last_queuefull_same_count = 0;
2020 }
2021 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
2022 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
2023 ahd_platform_set_tags(ahd, sdev, &devinfo,
2024 (dev->flags & AHD_DEV_Q_BASIC)
2025 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2026 break;
2027 }
2028 /*
2029 * Drop down to a single opening, and treat this
2030 * as if the target returned BUSY SCSI status.
2031 */
2032 dev->openings = 1;
2033 ahd_platform_set_tags(ahd, sdev, &devinfo,
2034 (dev->flags & AHD_DEV_Q_BASIC)
2035 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2036 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
2037 }
2038 }
2039
2040 static void
2041 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
2042 {
2043 int status;
2044 int new_status = DID_OK;
2045 int do_fallback = 0;
2046 int scsi_status;
2047
2048 /*
2049 * Map CAM error codes into Linux Error codes. We
2050 * avoid the conversion so that the DV code has the
2051 * full error information available when making
2052 * state change decisions.
2053 */
2054
2055 status = ahd_cmd_get_transaction_status(cmd);
2056 switch (status) {
2057 case CAM_REQ_INPROG:
2058 case CAM_REQ_CMP:
2059 new_status = DID_OK;
2060 break;
2061 case CAM_AUTOSENSE_FAIL:
2062 new_status = DID_ERROR;
2063 /* Fallthrough */
2064 case CAM_SCSI_STATUS_ERROR:
2065 scsi_status = ahd_cmd_get_scsi_status(cmd);
2066
2067 switch(scsi_status) {
2068 case SCSI_STATUS_CMD_TERMINATED:
2069 case SCSI_STATUS_CHECK_COND:
2070 if ((cmd->result >> 24) != DRIVER_SENSE) {
2071 do_fallback = 1;
2072 } else {
2073 struct scsi_sense_data *sense;
2074
2075 sense = (struct scsi_sense_data *)
2076 cmd->sense_buffer;
2077 if (sense->extra_len >= 5 &&
2078 (sense->add_sense_code == 0x47
2079 || sense->add_sense_code == 0x48))
2080 do_fallback = 1;
2081 }
2082 break;
2083 default:
2084 break;
2085 }
2086 break;
2087 case CAM_REQ_ABORTED:
2088 new_status = DID_ABORT;
2089 break;
2090 case CAM_BUSY:
2091 new_status = DID_BUS_BUSY;
2092 break;
2093 case CAM_REQ_INVALID:
2094 case CAM_PATH_INVALID:
2095 new_status = DID_BAD_TARGET;
2096 break;
2097 case CAM_SEL_TIMEOUT:
2098 new_status = DID_NO_CONNECT;
2099 break;
2100 case CAM_SCSI_BUS_RESET:
2101 case CAM_BDR_SENT:
2102 new_status = DID_RESET;
2103 break;
2104 case CAM_UNCOR_PARITY:
2105 new_status = DID_PARITY;
2106 do_fallback = 1;
2107 break;
2108 case CAM_CMD_TIMEOUT:
2109 new_status = DID_TIME_OUT;
2110 do_fallback = 1;
2111 break;
2112 case CAM_REQ_CMP_ERR:
2113 case CAM_UNEXP_BUSFREE:
2114 case CAM_DATA_RUN_ERR:
2115 new_status = DID_ERROR;
2116 do_fallback = 1;
2117 break;
2118 case CAM_UA_ABORT:
2119 case CAM_NO_HBA:
2120 case CAM_SEQUENCE_FAIL:
2121 case CAM_CCB_LEN_ERR:
2122 case CAM_PROVIDE_FAIL:
2123 case CAM_REQ_TERMIO:
2124 case CAM_UNREC_HBA_ERROR:
2125 case CAM_REQ_TOO_BIG:
2126 new_status = DID_ERROR;
2127 break;
2128 case CAM_REQUEUE_REQ:
2129 new_status = DID_REQUEUE;
2130 break;
2131 default:
2132 /* We should never get here */
2133 new_status = DID_ERROR;
2134 break;
2135 }
2136
2137 if (do_fallback) {
2138 printk("%s: device overrun (status %x) on %d:%d:%d\n",
2139 ahd_name(ahd), status, cmd->device->channel,
2140 cmd->device->id, cmd->device->lun);
2141 }
2142
2143 ahd_cmd_set_transaction_status(cmd, new_status);
2144
2145 cmd->scsi_done(cmd);
2146 }
2147
2148 static void
2149 ahd_freeze_simq(struct ahd_softc *ahd)
2150 {
2151 scsi_block_requests(ahd->platform_data->host);
2152 }
2153
2154 static void
2155 ahd_release_simq(struct ahd_softc *ahd)
2156 {
2157 scsi_unblock_requests(ahd->platform_data->host);
2158 }
2159
2160 static int
2161 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2162 {
2163 struct ahd_softc *ahd;
2164 struct ahd_linux_device *dev;
2165 struct scb *pending_scb;
2166 u_int saved_scbptr;
2167 u_int active_scbptr;
2168 u_int last_phase;
2169 u_int saved_scsiid;
2170 u_int cdb_byte;
2171 int retval;
2172 int was_paused;
2173 int paused;
2174 int wait;
2175 int disconnected;
2176 ahd_mode_state saved_modes;
2177 unsigned long flags;
2178
2179 pending_scb = NULL;
2180 paused = FALSE;
2181 wait = FALSE;
2182 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2183
2184 scmd_printk(KERN_INFO, cmd,
2185 "Attempting to queue an ABORT message:");
2186
2187 printk("CDB:");
2188 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2189 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2190 printk("\n");
2191
2192 ahd_lock(ahd, &flags);
2193
2194 /*
2195 * First determine if we currently own this command.
2196 * Start by searching the device queue. If not found
2197 * there, check the pending_scb list. If not found
2198 * at all, and the system wanted us to just abort the
2199 * command, return success.
2200 */
2201 dev = scsi_transport_device_data(cmd->device);
2202
2203 if (dev == NULL) {
2204 /*
2205 * No target device for this command exists,
2206 * so we must not still own the command.
2207 */
2208 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2209 retval = SUCCESS;
2210 goto no_cmd;
2211 }
2212
2213 /*
2214 * See if we can find a matching cmd in the pending list.
2215 */
2216 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2217 if (pending_scb->io_ctx == cmd)
2218 break;
2219 }
2220
2221 if (pending_scb == NULL) {
2222 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2223 goto no_cmd;
2224 }
2225
2226 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2227 /*
2228 * We can't queue two recovery actions using the same SCB
2229 */
2230 retval = FAILED;
2231 goto done;
2232 }
2233
2234 /*
2235 * Ensure that the card doesn't do anything
2236 * behind our back. Also make sure that we
2237 * didn't "just" miss an interrupt that would
2238 * affect this cmd.
2239 */
2240 was_paused = ahd_is_paused(ahd);
2241 ahd_pause_and_flushwork(ahd);
2242 paused = TRUE;
2243
2244 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2245 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2246 goto no_cmd;
2247 }
2248
2249 printk("%s: At time of recovery, card was %spaused\n",
2250 ahd_name(ahd), was_paused ? "" : "not ");
2251 ahd_dump_card_state(ahd);
2252
2253 disconnected = TRUE;
2254 if (ahd_search_qinfifo(ahd, cmd->device->id,
2255 cmd->device->channel + 'A',
2256 cmd->device->lun,
2257 pending_scb->hscb->tag,
2258 ROLE_INITIATOR, CAM_REQ_ABORTED,
2259 SEARCH_COMPLETE) > 0) {
2260 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2261 ahd_name(ahd), cmd->device->channel,
2262 cmd->device->id, cmd->device->lun);
2263 retval = SUCCESS;
2264 goto done;
2265 }
2266
2267 saved_modes = ahd_save_modes(ahd);
2268 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2269 last_phase = ahd_inb(ahd, LASTPHASE);
2270 saved_scbptr = ahd_get_scbptr(ahd);
2271 active_scbptr = saved_scbptr;
2272 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2273 struct scb *bus_scb;
2274
2275 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2276 if (bus_scb == pending_scb)
2277 disconnected = FALSE;
2278 }
2279
2280 /*
2281 * At this point, pending_scb is the scb associated with the
2282 * passed in command. That command is currently active on the
2283 * bus or is in the disconnected state.
2284 */
2285 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2286 if (last_phase != P_BUSFREE
2287 && SCB_GET_TAG(pending_scb) == active_scbptr) {
2288
2289 /*
2290 * We're active on the bus, so assert ATN
2291 * and hope that the target responds.
2292 */
2293 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2294 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2295 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2296 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2297 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2298 wait = TRUE;
2299 } else if (disconnected) {
2300
2301 /*
2302 * Actually re-queue this SCB in an attempt
2303 * to select the device before it reconnects.
2304 */
2305 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2306 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2307 pending_scb->hscb->cdb_len = 0;
2308 pending_scb->hscb->task_attribute = 0;
2309 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2310
2311 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2312 /*
2313 * Mark the SCB has having an outstanding
2314 * task management function. Should the command
2315 * complete normally before the task management
2316 * function can be sent, the host will be notified
2317 * to abort our requeued SCB.
2318 */
2319 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2320 pending_scb->hscb->task_management);
2321 } else {
2322 /*
2323 * If non-packetized, set the MK_MESSAGE control
2324 * bit indicating that we desire to send a message.
2325 * We also set the disconnected flag since there is
2326 * no guarantee that our SCB control byte matches
2327 * the version on the card. We don't want the
2328 * sequencer to abort the command thinking an
2329 * unsolicited reselection occurred.
2330 */
2331 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2332
2333 /*
2334 * The sequencer will never re-reference the
2335 * in-core SCB. To make sure we are notified
2336 * during reselection, set the MK_MESSAGE flag in
2337 * the card's copy of the SCB.
2338 */
2339 ahd_outb(ahd, SCB_CONTROL,
2340 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2341 }
2342
2343 /*
2344 * Clear out any entries in the QINFIFO first
2345 * so we are the next SCB for this target
2346 * to run.
2347 */
2348 ahd_search_qinfifo(ahd, cmd->device->id,
2349 cmd->device->channel + 'A', cmd->device->lun,
2350 SCB_LIST_NULL, ROLE_INITIATOR,
2351 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2352 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2353 ahd_set_scbptr(ahd, saved_scbptr);
2354 ahd_print_path(ahd, pending_scb);
2355 printk("Device is disconnected, re-queuing SCB\n");
2356 wait = TRUE;
2357 } else {
2358 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2359 retval = FAILED;
2360 goto done;
2361 }
2362
2363 no_cmd:
2364 /*
2365 * Our assumption is that if we don't have the command, no
2366 * recovery action was required, so we return success. Again,
2367 * the semantics of the mid-layer recovery engine are not
2368 * well defined, so this may change in time.
2369 */
2370 retval = SUCCESS;
2371 done:
2372 if (paused)
2373 ahd_unpause(ahd);
2374 if (wait) {
2375 DECLARE_COMPLETION_ONSTACK(done);
2376
2377 ahd->platform_data->eh_done = &done;
2378 ahd_unlock(ahd, &flags);
2379
2380 printk("%s: Recovery code sleeping\n", ahd_name(ahd));
2381 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2382 ahd_lock(ahd, &flags);
2383 ahd->platform_data->eh_done = NULL;
2384 ahd_unlock(ahd, &flags);
2385 printk("%s: Timer Expired (active %d)\n",
2386 ahd_name(ahd), dev->active);
2387 retval = FAILED;
2388 }
2389 printk("Recovery code awake\n");
2390 } else
2391 ahd_unlock(ahd, &flags);
2392
2393 if (retval != SUCCESS)
2394 printk("%s: Command abort returning 0x%x\n",
2395 ahd_name(ahd), retval);
2396
2397 return retval;
2398 }
2399
2400 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2401 {
2402 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2403 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2404 struct ahd_devinfo devinfo;
2405 unsigned long flags;
2406
2407 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2408 starget->channel + 'A', ROLE_INITIATOR);
2409 ahd_lock(ahd, &flags);
2410 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2411 ahd_unlock(ahd, &flags);
2412 }
2413
2414 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2415 {
2416 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2417 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2418 struct ahd_tmode_tstate *tstate;
2419 struct ahd_initiator_tinfo *tinfo
2420 = ahd_fetch_transinfo(ahd,
2421 starget->channel + 'A',
2422 shost->this_id, starget->id, &tstate);
2423 struct ahd_devinfo devinfo;
2424 unsigned int ppr_options = tinfo->goal.ppr_options;
2425 unsigned int dt;
2426 unsigned long flags;
2427 unsigned long offset = tinfo->goal.offset;
2428
2429 #ifdef AHD_DEBUG
2430 if ((ahd_debug & AHD_SHOW_DV) != 0)
2431 printk("%s: set period to %d\n", ahd_name(ahd), period);
2432 #endif
2433 if (offset == 0)
2434 offset = MAX_OFFSET;
2435
2436 if (period < 8)
2437 period = 8;
2438 if (period < 10) {
2439 if (spi_max_width(starget)) {
2440 ppr_options |= MSG_EXT_PPR_DT_REQ;
2441 if (period == 8)
2442 ppr_options |= MSG_EXT_PPR_IU_REQ;
2443 } else
2444 period = 10;
2445 }
2446
2447 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2448
2449 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2450 starget->channel + 'A', ROLE_INITIATOR);
2451
2452 /* all PPR requests apart from QAS require wide transfers */
2453 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2454 if (spi_width(starget) == 0)
2455 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2456 }
2457
2458 ahd_find_syncrate(ahd, &period, &ppr_options,
2459 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2460
2461 ahd_lock(ahd, &flags);
2462 ahd_set_syncrate(ahd, &devinfo, period, offset,
2463 ppr_options, AHD_TRANS_GOAL, FALSE);
2464 ahd_unlock(ahd, &flags);
2465 }
2466
2467 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2468 {
2469 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2470 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2471 struct ahd_tmode_tstate *tstate;
2472 struct ahd_initiator_tinfo *tinfo
2473 = ahd_fetch_transinfo(ahd,
2474 starget->channel + 'A',
2475 shost->this_id, starget->id, &tstate);
2476 struct ahd_devinfo devinfo;
2477 unsigned int ppr_options = 0;
2478 unsigned int period = 0;
2479 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2480 unsigned long flags;
2481
2482 #ifdef AHD_DEBUG
2483 if ((ahd_debug & AHD_SHOW_DV) != 0)
2484 printk("%s: set offset to %d\n", ahd_name(ahd), offset);
2485 #endif
2486
2487 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2488 starget->channel + 'A', ROLE_INITIATOR);
2489 if (offset != 0) {
2490 period = tinfo->goal.period;
2491 ppr_options = tinfo->goal.ppr_options;
2492 ahd_find_syncrate(ahd, &period, &ppr_options,
2493 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2494 }
2495
2496 ahd_lock(ahd, &flags);
2497 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2498 AHD_TRANS_GOAL, FALSE);
2499 ahd_unlock(ahd, &flags);
2500 }
2501
2502 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2503 {
2504 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2505 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2506 struct ahd_tmode_tstate *tstate;
2507 struct ahd_initiator_tinfo *tinfo
2508 = ahd_fetch_transinfo(ahd,
2509 starget->channel + 'A',
2510 shost->this_id, starget->id, &tstate);
2511 struct ahd_devinfo devinfo;
2512 unsigned int ppr_options = tinfo->goal.ppr_options
2513 & ~MSG_EXT_PPR_DT_REQ;
2514 unsigned int period = tinfo->goal.period;
2515 unsigned int width = tinfo->goal.width;
2516 unsigned long flags;
2517
2518 #ifdef AHD_DEBUG
2519 if ((ahd_debug & AHD_SHOW_DV) != 0)
2520 printk("%s: %s DT\n", ahd_name(ahd),
2521 dt ? "enabling" : "disabling");
2522 #endif
2523 if (dt && spi_max_width(starget)) {
2524 ppr_options |= MSG_EXT_PPR_DT_REQ;
2525 if (!width)
2526 ahd_linux_set_width(starget, 1);
2527 } else {
2528 if (period <= 9)
2529 period = 10; /* If resetting DT, period must be >= 25ns */
2530 /* IU is invalid without DT set */
2531 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2532 }
2533 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2534 starget->channel + 'A', ROLE_INITIATOR);
2535 ahd_find_syncrate(ahd, &period, &ppr_options,
2536 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2537
2538 ahd_lock(ahd, &flags);
2539 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2540 ppr_options, AHD_TRANS_GOAL, FALSE);
2541 ahd_unlock(ahd, &flags);
2542 }
2543
2544 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2545 {
2546 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2547 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2548 struct ahd_tmode_tstate *tstate;
2549 struct ahd_initiator_tinfo *tinfo
2550 = ahd_fetch_transinfo(ahd,
2551 starget->channel + 'A',
2552 shost->this_id, starget->id, &tstate);
2553 struct ahd_devinfo devinfo;
2554 unsigned int ppr_options = tinfo->goal.ppr_options
2555 & ~MSG_EXT_PPR_QAS_REQ;
2556 unsigned int period = tinfo->goal.period;
2557 unsigned int dt;
2558 unsigned long flags;
2559
2560 #ifdef AHD_DEBUG
2561 if ((ahd_debug & AHD_SHOW_DV) != 0)
2562 printk("%s: %s QAS\n", ahd_name(ahd),
2563 qas ? "enabling" : "disabling");
2564 #endif
2565
2566 if (qas) {
2567 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2568 }
2569
2570 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2571
2572 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2573 starget->channel + 'A', ROLE_INITIATOR);
2574 ahd_find_syncrate(ahd, &period, &ppr_options,
2575 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2576
2577 ahd_lock(ahd, &flags);
2578 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2579 ppr_options, AHD_TRANS_GOAL, FALSE);
2580 ahd_unlock(ahd, &flags);
2581 }
2582
2583 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2584 {
2585 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2586 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2587 struct ahd_tmode_tstate *tstate;
2588 struct ahd_initiator_tinfo *tinfo
2589 = ahd_fetch_transinfo(ahd,
2590 starget->channel + 'A',
2591 shost->this_id, starget->id, &tstate);
2592 struct ahd_devinfo devinfo;
2593 unsigned int ppr_options = tinfo->goal.ppr_options
2594 & ~MSG_EXT_PPR_IU_REQ;
2595 unsigned int period = tinfo->goal.period;
2596 unsigned int dt;
2597 unsigned long flags;
2598
2599 #ifdef AHD_DEBUG
2600 if ((ahd_debug & AHD_SHOW_DV) != 0)
2601 printk("%s: %s IU\n", ahd_name(ahd),
2602 iu ? "enabling" : "disabling");
2603 #endif
2604
2605 if (iu && spi_max_width(starget)) {
2606 ppr_options |= MSG_EXT_PPR_IU_REQ;
2607 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2608 }
2609
2610 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2611
2612 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2613 starget->channel + 'A', ROLE_INITIATOR);
2614 ahd_find_syncrate(ahd, &period, &ppr_options,
2615 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2616
2617 ahd_lock(ahd, &flags);
2618 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2619 ppr_options, AHD_TRANS_GOAL, FALSE);
2620 ahd_unlock(ahd, &flags);
2621 }
2622
2623 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2624 {
2625 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2626 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2627 struct ahd_tmode_tstate *tstate;
2628 struct ahd_initiator_tinfo *tinfo
2629 = ahd_fetch_transinfo(ahd,
2630 starget->channel + 'A',
2631 shost->this_id, starget->id, &tstate);
2632 struct ahd_devinfo devinfo;
2633 unsigned int ppr_options = tinfo->goal.ppr_options
2634 & ~MSG_EXT_PPR_RD_STRM;
2635 unsigned int period = tinfo->goal.period;
2636 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2637 unsigned long flags;
2638
2639 #ifdef AHD_DEBUG
2640 if ((ahd_debug & AHD_SHOW_DV) != 0)
2641 printk("%s: %s Read Streaming\n", ahd_name(ahd),
2642 rdstrm ? "enabling" : "disabling");
2643 #endif
2644
2645 if (rdstrm && spi_max_width(starget))
2646 ppr_options |= MSG_EXT_PPR_RD_STRM;
2647
2648 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2649 starget->channel + 'A', ROLE_INITIATOR);
2650 ahd_find_syncrate(ahd, &period, &ppr_options,
2651 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2652
2653 ahd_lock(ahd, &flags);
2654 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2655 ppr_options, AHD_TRANS_GOAL, FALSE);
2656 ahd_unlock(ahd, &flags);
2657 }
2658
2659 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2660 {
2661 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2662 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2663 struct ahd_tmode_tstate *tstate;
2664 struct ahd_initiator_tinfo *tinfo
2665 = ahd_fetch_transinfo(ahd,
2666 starget->channel + 'A',
2667 shost->this_id, starget->id, &tstate);
2668 struct ahd_devinfo devinfo;
2669 unsigned int ppr_options = tinfo->goal.ppr_options
2670 & ~MSG_EXT_PPR_WR_FLOW;
2671 unsigned int period = tinfo->goal.period;
2672 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2673 unsigned long flags;
2674
2675 #ifdef AHD_DEBUG
2676 if ((ahd_debug & AHD_SHOW_DV) != 0)
2677 printk("%s: %s Write Flow Control\n", ahd_name(ahd),
2678 wrflow ? "enabling" : "disabling");
2679 #endif
2680
2681 if (wrflow && spi_max_width(starget))
2682 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2683
2684 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2685 starget->channel + 'A', ROLE_INITIATOR);
2686 ahd_find_syncrate(ahd, &period, &ppr_options,
2687 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2688
2689 ahd_lock(ahd, &flags);
2690 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2691 ppr_options, AHD_TRANS_GOAL, FALSE);
2692 ahd_unlock(ahd, &flags);
2693 }
2694
2695 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2696 {
2697 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2698 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2699 struct ahd_tmode_tstate *tstate;
2700 struct ahd_initiator_tinfo *tinfo
2701 = ahd_fetch_transinfo(ahd,
2702 starget->channel + 'A',
2703 shost->this_id, starget->id, &tstate);
2704 struct ahd_devinfo devinfo;
2705 unsigned int ppr_options = tinfo->goal.ppr_options
2706 & ~MSG_EXT_PPR_RTI;
2707 unsigned int period = tinfo->goal.period;
2708 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2709 unsigned long flags;
2710
2711 if ((ahd->features & AHD_RTI) == 0) {
2712 #ifdef AHD_DEBUG
2713 if ((ahd_debug & AHD_SHOW_DV) != 0)
2714 printk("%s: RTI not available\n", ahd_name(ahd));
2715 #endif
2716 return;
2717 }
2718
2719 #ifdef AHD_DEBUG
2720 if ((ahd_debug & AHD_SHOW_DV) != 0)
2721 printk("%s: %s RTI\n", ahd_name(ahd),
2722 rti ? "enabling" : "disabling");
2723 #endif
2724
2725 if (rti && spi_max_width(starget))
2726 ppr_options |= MSG_EXT_PPR_RTI;
2727
2728 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2729 starget->channel + 'A', ROLE_INITIATOR);
2730 ahd_find_syncrate(ahd, &period, &ppr_options,
2731 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2732
2733 ahd_lock(ahd, &flags);
2734 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2735 ppr_options, AHD_TRANS_GOAL, FALSE);
2736 ahd_unlock(ahd, &flags);
2737 }
2738
2739 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2740 {
2741 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2742 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2743 struct ahd_tmode_tstate *tstate;
2744 struct ahd_initiator_tinfo *tinfo
2745 = ahd_fetch_transinfo(ahd,
2746 starget->channel + 'A',
2747 shost->this_id, starget->id, &tstate);
2748 struct ahd_devinfo devinfo;
2749 unsigned int ppr_options = tinfo->goal.ppr_options
2750 & ~MSG_EXT_PPR_PCOMP_EN;
2751 unsigned int period = tinfo->goal.period;
2752 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2753 unsigned long flags;
2754
2755 #ifdef AHD_DEBUG
2756 if ((ahd_debug & AHD_SHOW_DV) != 0)
2757 printk("%s: %s Precompensation\n", ahd_name(ahd),
2758 pcomp ? "Enable" : "Disable");
2759 #endif
2760
2761 if (pcomp && spi_max_width(starget)) {
2762 uint8_t precomp;
2763
2764 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2765 const struct ahd_linux_iocell_opts *iocell_opts;
2766
2767 iocell_opts = &aic79xx_iocell_info[ahd->unit];
2768 precomp = iocell_opts->precomp;
2769 } else {
2770 precomp = AIC79XX_DEFAULT_PRECOMP;
2771 }
2772 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2773 AHD_SET_PRECOMP(ahd, precomp);
2774 } else {
2775 AHD_SET_PRECOMP(ahd, 0);
2776 }
2777
2778 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2779 starget->channel + 'A', ROLE_INITIATOR);
2780 ahd_find_syncrate(ahd, &period, &ppr_options,
2781 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2782
2783 ahd_lock(ahd, &flags);
2784 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2785 ppr_options, AHD_TRANS_GOAL, FALSE);
2786 ahd_unlock(ahd, &flags);
2787 }
2788
2789 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2790 {
2791 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2792 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2793 struct ahd_tmode_tstate *tstate;
2794 struct ahd_initiator_tinfo *tinfo
2795 = ahd_fetch_transinfo(ahd,
2796 starget->channel + 'A',
2797 shost->this_id, starget->id, &tstate);
2798 struct ahd_devinfo devinfo;
2799 unsigned int ppr_options = tinfo->goal.ppr_options
2800 & ~MSG_EXT_PPR_HOLD_MCS;
2801 unsigned int period = tinfo->goal.period;
2802 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2803 unsigned long flags;
2804
2805 if (hold && spi_max_width(starget))
2806 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2807
2808 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2809 starget->channel + 'A', ROLE_INITIATOR);
2810 ahd_find_syncrate(ahd, &period, &ppr_options,
2811 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2812
2813 ahd_lock(ahd, &flags);
2814 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2815 ppr_options, AHD_TRANS_GOAL, FALSE);
2816 ahd_unlock(ahd, &flags);
2817 }
2818
2819 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2820 {
2821 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2822 unsigned long flags;
2823 u8 mode;
2824
2825 ahd_lock(ahd, &flags);
2826 ahd_pause(ahd);
2827 mode = ahd_inb(ahd, SBLKCTL);
2828 ahd_unpause(ahd);
2829 ahd_unlock(ahd, &flags);
2830
2831 if (mode & ENAB40)
2832 spi_signalling(shost) = SPI_SIGNAL_LVD;
2833 else if (mode & ENAB20)
2834 spi_signalling(shost) = SPI_SIGNAL_SE;
2835 else
2836 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2837 }
2838
2839 static struct spi_function_template ahd_linux_transport_functions = {
2840 .set_offset = ahd_linux_set_offset,
2841 .show_offset = 1,
2842 .set_period = ahd_linux_set_period,
2843 .show_period = 1,
2844 .set_width = ahd_linux_set_width,
2845 .show_width = 1,
2846 .set_dt = ahd_linux_set_dt,
2847 .show_dt = 1,
2848 .set_iu = ahd_linux_set_iu,
2849 .show_iu = 1,
2850 .set_qas = ahd_linux_set_qas,
2851 .show_qas = 1,
2852 .set_rd_strm = ahd_linux_set_rd_strm,
2853 .show_rd_strm = 1,
2854 .set_wr_flow = ahd_linux_set_wr_flow,
2855 .show_wr_flow = 1,
2856 .set_rti = ahd_linux_set_rti,
2857 .show_rti = 1,
2858 .set_pcomp_en = ahd_linux_set_pcomp_en,
2859 .show_pcomp_en = 1,
2860 .set_hold_mcs = ahd_linux_set_hold_mcs,
2861 .show_hold_mcs = 1,
2862 .get_signalling = ahd_linux_get_signalling,
2863 };
2864
2865 static int __init
2866 ahd_linux_init(void)
2867 {
2868 int error = 0;
2869
2870 /*
2871 * If we've been passed any parameters, process them now.
2872 */
2873 if (aic79xx)
2874 aic79xx_setup(aic79xx);
2875
2876 ahd_linux_transport_template =
2877 spi_attach_transport(&ahd_linux_transport_functions);
2878 if (!ahd_linux_transport_template)
2879 return -ENODEV;
2880
2881 scsi_transport_reserve_device(ahd_linux_transport_template,
2882 sizeof(struct ahd_linux_device));
2883
2884 error = ahd_linux_pci_init();
2885 if (error)
2886 spi_release_transport(ahd_linux_transport_template);
2887 return error;
2888 }
2889
2890 static void __exit
2891 ahd_linux_exit(void)
2892 {
2893 ahd_linux_pci_exit();
2894 spi_release_transport(ahd_linux_transport_template);
2895 }
2896
2897 module_init(ahd_linux_init);
2898 module_exit(ahd_linux_exit);
Linux with added FPC-III support