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ACPI/PCI: Negotiate _OSC control bits before requesting them
[linux-2.6/cjktty.git] / drivers / scsi / aic7xxx / aic79xx_osm.c
blob88ad8482ef59b6e33cbdfeafe2d1c962ee05be8b
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(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 struct scsi_target **
592 ahd_linux_target_in_softc(struct scsi_target *starget)
593 {
594 struct ahd_softc *ahd =
595 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
596 unsigned int target_offset;
597
598 target_offset = starget->id;
599 if (starget->channel != 0)
600 target_offset += 8;
601
602 return &ahd->platform_data->starget[target_offset];
603 }
604
605 static int
606 ahd_linux_target_alloc(struct scsi_target *starget)
607 {
608 struct ahd_softc *ahd =
609 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
610 struct seeprom_config *sc = ahd->seep_config;
611 unsigned long flags;
612 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
613 struct ahd_devinfo devinfo;
614 struct ahd_initiator_tinfo *tinfo;
615 struct ahd_tmode_tstate *tstate;
616 char channel = starget->channel + 'A';
617
618 ahd_lock(ahd, &flags);
619
620 BUG_ON(*ahd_targp != NULL);
621
622 *ahd_targp = starget;
623
624 if (sc) {
625 int flags = sc->device_flags[starget->id];
626
627 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
628 starget->id, &tstate);
629
630 if ((flags & CFPACKETIZED) == 0) {
631 /* don't negotiate packetized (IU) transfers */
632 spi_max_iu(starget) = 0;
633 } else {
634 if ((ahd->features & AHD_RTI) == 0)
635 spi_rti(starget) = 0;
636 }
637
638 if ((flags & CFQAS) == 0)
639 spi_max_qas(starget) = 0;
640
641 /* Transinfo values have been set to BIOS settings */
642 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
643 spi_min_period(starget) = tinfo->user.period;
644 spi_max_offset(starget) = tinfo->user.offset;
645 }
646
647 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
648 starget->id, &tstate);
649 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
650 CAM_LUN_WILDCARD, channel,
651 ROLE_INITIATOR);
652 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
653 AHD_TRANS_GOAL, /*paused*/FALSE);
654 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
655 AHD_TRANS_GOAL, /*paused*/FALSE);
656 ahd_unlock(ahd, &flags);
657
658 return 0;
659 }
660
661 static void
662 ahd_linux_target_destroy(struct scsi_target *starget)
663 {
664 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
665
666 *ahd_targp = NULL;
667 }
668
669 static int
670 ahd_linux_slave_alloc(struct scsi_device *sdev)
671 {
672 struct ahd_softc *ahd =
673 *((struct ahd_softc **)sdev->host->hostdata);
674 struct ahd_linux_device *dev;
675
676 if (bootverbose)
677 printk("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
678
679 dev = scsi_transport_device_data(sdev);
680 memset(dev, 0, sizeof(*dev));
681
682 /*
683 * We start out life using untagged
684 * transactions of which we allow one.
685 */
686 dev->openings = 1;
687
688 /*
689 * Set maxtags to 0. This will be changed if we
690 * later determine that we are dealing with
691 * a tagged queuing capable device.
692 */
693 dev->maxtags = 0;
694
695 return (0);
696 }
697
698 static int
699 ahd_linux_slave_configure(struct scsi_device *sdev)
700 {
701 struct ahd_softc *ahd;
702
703 ahd = *((struct ahd_softc **)sdev->host->hostdata);
704 if (bootverbose)
705 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
706
707 ahd_linux_device_queue_depth(sdev);
708
709 /* Initial Domain Validation */
710 if (!spi_initial_dv(sdev->sdev_target))
711 spi_dv_device(sdev);
712
713 return 0;
714 }
715
716 #if defined(__i386__)
717 /*
718 * Return the disk geometry for the given SCSI device.
719 */
720 static int
721 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
722 sector_t capacity, int geom[])
723 {
724 uint8_t *bh;
725 int heads;
726 int sectors;
727 int cylinders;
728 int ret;
729 int extended;
730 struct ahd_softc *ahd;
731
732 ahd = *((struct ahd_softc **)sdev->host->hostdata);
733
734 bh = scsi_bios_ptable(bdev);
735 if (bh) {
736 ret = scsi_partsize(bh, capacity,
737 &geom[2], &geom[0], &geom[1]);
738 kfree(bh);
739 if (ret != -1)
740 return (ret);
741 }
742 heads = 64;
743 sectors = 32;
744 cylinders = aic_sector_div(capacity, heads, sectors);
745
746 if (aic79xx_extended != 0)
747 extended = 1;
748 else
749 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
750 if (extended && cylinders >= 1024) {
751 heads = 255;
752 sectors = 63;
753 cylinders = aic_sector_div(capacity, heads, sectors);
754 }
755 geom[0] = heads;
756 geom[1] = sectors;
757 geom[2] = cylinders;
758 return (0);
759 }
760 #endif
761
762 /*
763 * Abort the current SCSI command(s).
764 */
765 static int
766 ahd_linux_abort(struct scsi_cmnd *cmd)
767 {
768 int error;
769
770 error = ahd_linux_queue_abort_cmd(cmd);
771
772 return error;
773 }
774
775 /*
776 * Attempt to send a target reset message to the device that timed out.
777 */
778 static int
779 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
780 {
781 struct ahd_softc *ahd;
782 struct ahd_linux_device *dev;
783 struct scb *reset_scb;
784 u_int cdb_byte;
785 int retval = SUCCESS;
786 int paused;
787 int wait;
788 struct ahd_initiator_tinfo *tinfo;
789 struct ahd_tmode_tstate *tstate;
790 unsigned long flags;
791 DECLARE_COMPLETION_ONSTACK(done);
792
793 reset_scb = NULL;
794 paused = FALSE;
795 wait = FALSE;
796 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
797
798 scmd_printk(KERN_INFO, cmd,
799 "Attempting to queue a TARGET RESET message:");
800
801 printk("CDB:");
802 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
803 printk(" 0x%x", cmd->cmnd[cdb_byte]);
804 printk("\n");
805
806 /*
807 * Determine if we currently own this command.
808 */
809 dev = scsi_transport_device_data(cmd->device);
810
811 if (dev == NULL) {
812 /*
813 * No target device for this command exists,
814 * so we must not still own the command.
815 */
816 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
817 return SUCCESS;
818 }
819
820 /*
821 * Generate us a new SCB
822 */
823 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
824 if (!reset_scb) {
825 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
826 return FAILED;
827 }
828
829 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
830 cmd->device->id, &tstate);
831 reset_scb->io_ctx = cmd;
832 reset_scb->platform_data->dev = dev;
833 reset_scb->sg_count = 0;
834 ahd_set_residual(reset_scb, 0);
835 ahd_set_sense_residual(reset_scb, 0);
836 reset_scb->platform_data->xfer_len = 0;
837 reset_scb->hscb->control = 0;
838 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
839 reset_scb->hscb->lun = cmd->device->lun;
840 reset_scb->hscb->cdb_len = 0;
841 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
842 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
843 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
844 reset_scb->flags |= SCB_PACKETIZED;
845 } else {
846 reset_scb->hscb->control |= MK_MESSAGE;
847 }
848 dev->openings--;
849 dev->active++;
850 dev->commands_issued++;
851
852 ahd_lock(ahd, &flags);
853
854 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
855 ahd_queue_scb(ahd, reset_scb);
856
857 ahd->platform_data->eh_done = &done;
858 ahd_unlock(ahd, &flags);
859
860 printk("%s: Device reset code sleeping\n", ahd_name(ahd));
861 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
862 ahd_lock(ahd, &flags);
863 ahd->platform_data->eh_done = NULL;
864 ahd_unlock(ahd, &flags);
865 printk("%s: Device reset timer expired (active %d)\n",
866 ahd_name(ahd), dev->active);
867 retval = FAILED;
868 }
869 printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
870
871 return (retval);
872 }
873
874 /*
875 * Reset the SCSI bus.
876 */
877 static int
878 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
879 {
880 struct ahd_softc *ahd;
881 int found;
882 unsigned long flags;
883
884 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
885 #ifdef AHD_DEBUG
886 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
887 printk("%s: Bus reset called for cmd %p\n",
888 ahd_name(ahd), cmd);
889 #endif
890 ahd_lock(ahd, &flags);
891
892 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
893 /*initiate reset*/TRUE);
894 ahd_unlock(ahd, &flags);
895
896 if (bootverbose)
897 printk("%s: SCSI bus reset delivered. "
898 "%d SCBs aborted.\n", ahd_name(ahd), found);
899
900 return (SUCCESS);
901 }
902
903 struct scsi_host_template aic79xx_driver_template = {
904 .module = THIS_MODULE,
905 .name = "aic79xx",
906 .proc_name = "aic79xx",
907 .proc_info = ahd_linux_proc_info,
908 .info = ahd_linux_info,
909 .queuecommand = ahd_linux_queue,
910 .eh_abort_handler = ahd_linux_abort,
911 .eh_device_reset_handler = ahd_linux_dev_reset,
912 .eh_bus_reset_handler = ahd_linux_bus_reset,
913 #if defined(__i386__)
914 .bios_param = ahd_linux_biosparam,
915 #endif
916 .can_queue = AHD_MAX_QUEUE,
917 .this_id = -1,
918 .max_sectors = 8192,
919 .cmd_per_lun = 2,
920 .use_clustering = ENABLE_CLUSTERING,
921 .slave_alloc = ahd_linux_slave_alloc,
922 .slave_configure = ahd_linux_slave_configure,
923 .target_alloc = ahd_linux_target_alloc,
924 .target_destroy = ahd_linux_target_destroy,
925 };
926
927 /******************************** Bus DMA *************************************/
928 int
929 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
930 bus_size_t alignment, bus_size_t boundary,
931 dma_addr_t lowaddr, dma_addr_t highaddr,
932 bus_dma_filter_t *filter, void *filterarg,
933 bus_size_t maxsize, int nsegments,
934 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
935 {
936 bus_dma_tag_t dmat;
937
938 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
939 if (dmat == NULL)
940 return (ENOMEM);
941
942 /*
943 * Linux is very simplistic about DMA memory. For now don't
944 * maintain all specification information. Once Linux supplies
945 * better facilities for doing these operations, or the
946 * needs of this particular driver change, we might need to do
947 * more here.
948 */
949 dmat->alignment = alignment;
950 dmat->boundary = boundary;
951 dmat->maxsize = maxsize;
952 *ret_tag = dmat;
953 return (0);
954 }
955
956 void
957 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
958 {
959 kfree(dmat);
960 }
961
962 int
963 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
964 int flags, bus_dmamap_t *mapp)
965 {
966 *vaddr = pci_alloc_consistent(ahd->dev_softc,
967 dmat->maxsize, mapp);
968 if (*vaddr == NULL)
969 return (ENOMEM);
970 return(0);
971 }
972
973 void
974 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
975 void* vaddr, bus_dmamap_t map)
976 {
977 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
978 vaddr, map);
979 }
980
981 int
982 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
983 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
984 void *cb_arg, int flags)
985 {
986 /*
987 * Assume for now that this will only be used during
988 * initialization and not for per-transaction buffer mapping.
989 */
990 bus_dma_segment_t stack_sg;
991
992 stack_sg.ds_addr = map;
993 stack_sg.ds_len = dmat->maxsize;
994 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
995 return (0);
996 }
997
998 void
999 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1000 {
1001 }
1002
1003 int
1004 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1005 {
1006 /* Nothing to do */
1007 return (0);
1008 }
1009
1010 /********************* Platform Dependent Functions ***************************/
1011 static void
1012 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
1013 {
1014
1015 if ((instance >= 0)
1016 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
1017 uint8_t *iocell_info;
1018
1019 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1020 iocell_info[index] = value & 0xFFFF;
1021 if (bootverbose)
1022 printk("iocell[%d:%ld] = %d\n", instance, index, value);
1023 }
1024 }
1025
1026 static void
1027 ahd_linux_setup_tag_info_global(char *p)
1028 {
1029 int tags, i, j;
1030
1031 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1032 printk("Setting Global Tags= %d\n", tags);
1033
1034 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
1035 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1036 aic79xx_tag_info[i].tag_commands[j] = tags;
1037 }
1038 }
1039 }
1040
1041 static void
1042 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1043 {
1044
1045 if ((instance >= 0) && (targ >= 0)
1046 && (instance < ARRAY_SIZE(aic79xx_tag_info))
1047 && (targ < AHD_NUM_TARGETS)) {
1048 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1049 if (bootverbose)
1050 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
1051 }
1052 }
1053
1054 static char *
1055 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
1056 void (*callback)(u_long, int, int, int32_t),
1057 u_long callback_arg)
1058 {
1059 char *tok_end;
1060 char *tok_end2;
1061 int i;
1062 int instance;
1063 int targ;
1064 int done;
1065 char tok_list[] = {'.', ',', '{', '}', '\0'};
1066
1067 /* All options use a ':' name/arg separator */
1068 if (*opt_arg != ':')
1069 return (opt_arg);
1070 opt_arg++;
1071 instance = -1;
1072 targ = -1;
1073 done = FALSE;
1074 /*
1075 * Restore separator that may be in
1076 * the middle of our option argument.
1077 */
1078 tok_end = strchr(opt_arg, '\0');
1079 if (tok_end < end)
1080 *tok_end = ',';
1081 while (!done) {
1082 switch (*opt_arg) {
1083 case '{':
1084 if (instance == -1) {
1085 instance = 0;
1086 } else {
1087 if (depth > 1) {
1088 if (targ == -1)
1089 targ = 0;
1090 } else {
1091 printk("Malformed Option %s\n",
1092 opt_name);
1093 done = TRUE;
1094 }
1095 }
1096 opt_arg++;
1097 break;
1098 case '}':
1099 if (targ != -1)
1100 targ = -1;
1101 else if (instance != -1)
1102 instance = -1;
1103 opt_arg++;
1104 break;
1105 case ',':
1106 case '.':
1107 if (instance == -1)
1108 done = TRUE;
1109 else if (targ >= 0)
1110 targ++;
1111 else if (instance >= 0)
1112 instance++;
1113 opt_arg++;
1114 break;
1115 case '\0':
1116 done = TRUE;
1117 break;
1118 default:
1119 tok_end = end;
1120 for (i = 0; tok_list[i]; i++) {
1121 tok_end2 = strchr(opt_arg, tok_list[i]);
1122 if ((tok_end2) && (tok_end2 < tok_end))
1123 tok_end = tok_end2;
1124 }
1125 callback(callback_arg, instance, targ,
1126 simple_strtol(opt_arg, NULL, 0));
1127 opt_arg = tok_end;
1128 break;
1129 }
1130 }
1131 return (opt_arg);
1132 }
1133
1134 /*
1135 * Handle Linux boot parameters. This routine allows for assigning a value
1136 * to a parameter with a ':' between the parameter and the value.
1137 * ie. aic79xx=stpwlev:1,extended
1138 */
1139 static int
1140 aic79xx_setup(char *s)
1141 {
1142 int i, n;
1143 char *p;
1144 char *end;
1145
1146 static const struct {
1147 const char *name;
1148 uint32_t *flag;
1149 } options[] = {
1150 { "extended", &aic79xx_extended },
1151 { "no_reset", &aic79xx_no_reset },
1152 { "verbose", &aic79xx_verbose },
1153 { "allow_memio", &aic79xx_allow_memio},
1154 #ifdef AHD_DEBUG
1155 { "debug", &ahd_debug },
1156 #endif
1157 { "periodic_otag", &aic79xx_periodic_otag },
1158 { "pci_parity", &aic79xx_pci_parity },
1159 { "seltime", &aic79xx_seltime },
1160 { "tag_info", NULL },
1161 { "global_tag_depth", NULL},
1162 { "slewrate", NULL },
1163 { "precomp", NULL },
1164 { "amplitude", NULL },
1165 { "slowcrc", &aic79xx_slowcrc },
1166 };
1167
1168 end = strchr(s, '\0');
1169
1170 /*
1171 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1172 * will never be 0 in this case.
1173 */
1174 n = 0;
1175
1176 while ((p = strsep(&s, ",.")) != NULL) {
1177 if (*p == '\0')
1178 continue;
1179 for (i = 0; i < ARRAY_SIZE(options); i++) {
1180
1181 n = strlen(options[i].name);
1182 if (strncmp(options[i].name, p, n) == 0)
1183 break;
1184 }
1185 if (i == ARRAY_SIZE(options))
1186 continue;
1187
1188 if (strncmp(p, "global_tag_depth", n) == 0) {
1189 ahd_linux_setup_tag_info_global(p + n);
1190 } else if (strncmp(p, "tag_info", n) == 0) {
1191 s = ahd_parse_brace_option("tag_info", p + n, end,
1192 2, ahd_linux_setup_tag_info, 0);
1193 } else if (strncmp(p, "slewrate", n) == 0) {
1194 s = ahd_parse_brace_option("slewrate",
1195 p + n, end, 1, ahd_linux_setup_iocell_info,
1196 AIC79XX_SLEWRATE_INDEX);
1197 } else if (strncmp(p, "precomp", n) == 0) {
1198 s = ahd_parse_brace_option("precomp",
1199 p + n, end, 1, ahd_linux_setup_iocell_info,
1200 AIC79XX_PRECOMP_INDEX);
1201 } else if (strncmp(p, "amplitude", n) == 0) {
1202 s = ahd_parse_brace_option("amplitude",
1203 p + n, end, 1, ahd_linux_setup_iocell_info,
1204 AIC79XX_AMPLITUDE_INDEX);
1205 } else if (p[n] == ':') {
1206 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1207 } else if (!strncmp(p, "verbose", n)) {
1208 *(options[i].flag) = 1;
1209 } else {
1210 *(options[i].flag) ^= 0xFFFFFFFF;
1211 }
1212 }
1213 return 1;
1214 }
1215
1216 __setup("aic79xx=", aic79xx_setup);
1217
1218 uint32_t aic79xx_verbose;
1219
1220 int
1221 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1222 {
1223 char buf[80];
1224 struct Scsi_Host *host;
1225 char *new_name;
1226 u_long s;
1227 int retval;
1228
1229 template->name = ahd->description;
1230 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1231 if (host == NULL)
1232 return (ENOMEM);
1233
1234 *((struct ahd_softc **)host->hostdata) = ahd;
1235 ahd->platform_data->host = host;
1236 host->can_queue = AHD_MAX_QUEUE;
1237 host->cmd_per_lun = 2;
1238 host->sg_tablesize = AHD_NSEG;
1239 host->this_id = ahd->our_id;
1240 host->irq = ahd->platform_data->irq;
1241 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1242 host->max_lun = AHD_NUM_LUNS;
1243 host->max_channel = 0;
1244 host->sg_tablesize = AHD_NSEG;
1245 ahd_lock(ahd, &s);
1246 ahd_set_unit(ahd, ahd_linux_unit++);
1247 ahd_unlock(ahd, &s);
1248 sprintf(buf, "scsi%d", host->host_no);
1249 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1250 if (new_name != NULL) {
1251 strcpy(new_name, buf);
1252 ahd_set_name(ahd, new_name);
1253 }
1254 host->unique_id = ahd->unit;
1255 ahd_linux_initialize_scsi_bus(ahd);
1256 ahd_intr_enable(ahd, TRUE);
1257
1258 host->transportt = ahd_linux_transport_template;
1259
1260 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1261 if (retval) {
1262 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1263 scsi_host_put(host);
1264 return retval;
1265 }
1266
1267 scsi_scan_host(host);
1268 return 0;
1269 }
1270
1271 /*
1272 * Place the SCSI bus into a known state by either resetting it,
1273 * or forcing transfer negotiations on the next command to any
1274 * target.
1275 */
1276 static void
1277 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1278 {
1279 u_int target_id;
1280 u_int numtarg;
1281 unsigned long s;
1282
1283 target_id = 0;
1284 numtarg = 0;
1285
1286 if (aic79xx_no_reset != 0)
1287 ahd->flags &= ~AHD_RESET_BUS_A;
1288
1289 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1290 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1291 else
1292 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1293
1294 ahd_lock(ahd, &s);
1295
1296 /*
1297 * Force negotiation to async for all targets that
1298 * will not see an initial bus reset.
1299 */
1300 for (; target_id < numtarg; target_id++) {
1301 struct ahd_devinfo devinfo;
1302 struct ahd_initiator_tinfo *tinfo;
1303 struct ahd_tmode_tstate *tstate;
1304
1305 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1306 target_id, &tstate);
1307 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1308 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1309 ahd_update_neg_request(ahd, &devinfo, tstate,
1310 tinfo, AHD_NEG_ALWAYS);
1311 }
1312 ahd_unlock(ahd, &s);
1313 /* Give the bus some time to recover */
1314 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1315 ahd_freeze_simq(ahd);
1316 msleep(AIC79XX_RESET_DELAY);
1317 ahd_release_simq(ahd);
1318 }
1319 }
1320
1321 int
1322 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1323 {
1324 ahd->platform_data =
1325 kmalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC);
1326 if (ahd->platform_data == NULL)
1327 return (ENOMEM);
1328 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1329 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1330 ahd_lockinit(ahd);
1331 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1332 return (0);
1333 }
1334
1335 void
1336 ahd_platform_free(struct ahd_softc *ahd)
1337 {
1338 struct scsi_target *starget;
1339 int i;
1340
1341 if (ahd->platform_data != NULL) {
1342 /* destroy all of the device and target objects */
1343 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1344 starget = ahd->platform_data->starget[i];
1345 if (starget != NULL) {
1346 ahd->platform_data->starget[i] = NULL;
1347 }
1348 }
1349
1350 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1351 free_irq(ahd->platform_data->irq, ahd);
1352 if (ahd->tags[0] == BUS_SPACE_PIO
1353 && ahd->bshs[0].ioport != 0)
1354 release_region(ahd->bshs[0].ioport, 256);
1355 if (ahd->tags[1] == BUS_SPACE_PIO
1356 && ahd->bshs[1].ioport != 0)
1357 release_region(ahd->bshs[1].ioport, 256);
1358 if (ahd->tags[0] == BUS_SPACE_MEMIO
1359 && ahd->bshs[0].maddr != NULL) {
1360 iounmap(ahd->bshs[0].maddr);
1361 release_mem_region(ahd->platform_data->mem_busaddr,
1362 0x1000);
1363 }
1364 if (ahd->platform_data->host)
1365 scsi_host_put(ahd->platform_data->host);
1366
1367 kfree(ahd->platform_data);
1368 }
1369 }
1370
1371 void
1372 ahd_platform_init(struct ahd_softc *ahd)
1373 {
1374 /*
1375 * Lookup and commit any modified IO Cell options.
1376 */
1377 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1378 const struct ahd_linux_iocell_opts *iocell_opts;
1379
1380 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1381 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1382 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1383 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1384 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1385 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1386 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1387 }
1388
1389 }
1390
1391 void
1392 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1393 {
1394 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1395 SCB_GET_CHANNEL(ahd, scb),
1396 SCB_GET_LUN(scb), SCB_LIST_NULL,
1397 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1398 }
1399
1400 void
1401 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1402 struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1403 {
1404 struct ahd_linux_device *dev;
1405 int was_queuing;
1406 int now_queuing;
1407
1408 if (sdev == NULL)
1409 return;
1410
1411 dev = scsi_transport_device_data(sdev);
1412
1413 if (dev == NULL)
1414 return;
1415 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1416 switch (alg) {
1417 default:
1418 case AHD_QUEUE_NONE:
1419 now_queuing = 0;
1420 break;
1421 case AHD_QUEUE_BASIC:
1422 now_queuing = AHD_DEV_Q_BASIC;
1423 break;
1424 case AHD_QUEUE_TAGGED:
1425 now_queuing = AHD_DEV_Q_TAGGED;
1426 break;
1427 }
1428 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1429 && (was_queuing != now_queuing)
1430 && (dev->active != 0)) {
1431 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1432 dev->qfrozen++;
1433 }
1434
1435 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1436 if (now_queuing) {
1437 u_int usertags;
1438
1439 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1440 if (!was_queuing) {
1441 /*
1442 * Start out agressively and allow our
1443 * dynamic queue depth algorithm to take
1444 * care of the rest.
1445 */
1446 dev->maxtags = usertags;
1447 dev->openings = dev->maxtags - dev->active;
1448 }
1449 if (dev->maxtags == 0) {
1450 /*
1451 * Queueing is disabled by the user.
1452 */
1453 dev->openings = 1;
1454 } else if (alg == AHD_QUEUE_TAGGED) {
1455 dev->flags |= AHD_DEV_Q_TAGGED;
1456 if (aic79xx_periodic_otag != 0)
1457 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1458 } else
1459 dev->flags |= AHD_DEV_Q_BASIC;
1460 } else {
1461 /* We can only have one opening. */
1462 dev->maxtags = 0;
1463 dev->openings = 1 - dev->active;
1464 }
1465
1466 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1467 case AHD_DEV_Q_BASIC:
1468 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1469 scsi_activate_tcq(sdev, dev->openings + dev->active);
1470 break;
1471 case AHD_DEV_Q_TAGGED:
1472 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1473 scsi_activate_tcq(sdev, dev->openings + dev->active);
1474 break;
1475 default:
1476 /*
1477 * We allow the OS to queue 2 untagged transactions to
1478 * us at any time even though we can only execute them
1479 * serially on the controller/device. This should
1480 * remove some latency.
1481 */
1482 scsi_deactivate_tcq(sdev, 1);
1483 break;
1484 }
1485 }
1486
1487 int
1488 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1489 int lun, u_int tag, role_t role, uint32_t status)
1490 {
1491 return 0;
1492 }
1493
1494 static u_int
1495 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1496 {
1497 static int warned_user;
1498 u_int tags;
1499
1500 tags = 0;
1501 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1502 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1503
1504 if (warned_user == 0) {
1505 printk(KERN_WARNING
1506 "aic79xx: WARNING: Insufficient tag_info instances\n"
1507 "aic79xx: for installed controllers. Using defaults\n"
1508 "aic79xx: Please update the aic79xx_tag_info array in\n"
1509 "aic79xx: the aic79xx_osm.c source file.\n");
1510 warned_user++;
1511 }
1512 tags = AHD_MAX_QUEUE;
1513 } else {
1514 adapter_tag_info_t *tag_info;
1515
1516 tag_info = &aic79xx_tag_info[ahd->unit];
1517 tags = tag_info->tag_commands[devinfo->target_offset];
1518 if (tags > AHD_MAX_QUEUE)
1519 tags = AHD_MAX_QUEUE;
1520 }
1521 }
1522 return (tags);
1523 }
1524
1525 /*
1526 * Determines the queue depth for a given device.
1527 */
1528 static void
1529 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1530 {
1531 struct ahd_devinfo devinfo;
1532 u_int tags;
1533 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1534
1535 ahd_compile_devinfo(&devinfo,
1536 ahd->our_id,
1537 sdev->sdev_target->id, sdev->lun,
1538 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1539 ROLE_INITIATOR);
1540 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1541 if (tags != 0 && sdev->tagged_supported != 0) {
1542
1543 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1544 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1545 devinfo.lun, AC_TRANSFER_NEG);
1546 ahd_print_devinfo(ahd, &devinfo);
1547 printk("Tagged Queuing enabled. Depth %d\n", tags);
1548 } else {
1549 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1550 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1551 devinfo.lun, AC_TRANSFER_NEG);
1552 }
1553 }
1554
1555 static int
1556 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1557 struct scsi_cmnd *cmd)
1558 {
1559 struct scb *scb;
1560 struct hardware_scb *hscb;
1561 struct ahd_initiator_tinfo *tinfo;
1562 struct ahd_tmode_tstate *tstate;
1563 u_int col_idx;
1564 uint16_t mask;
1565 unsigned long flags;
1566 int nseg;
1567
1568 nseg = scsi_dma_map(cmd);
1569 if (nseg < 0)
1570 return SCSI_MLQUEUE_HOST_BUSY;
1571
1572 ahd_lock(ahd, &flags);
1573
1574 /*
1575 * Get an scb to use.
1576 */
1577 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1578 cmd->device->id, &tstate);
1579 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1580 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1581 col_idx = AHD_NEVER_COL_IDX;
1582 } else {
1583 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1584 cmd->device->lun);
1585 }
1586 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1587 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1588 ahd_unlock(ahd, &flags);
1589 scsi_dma_unmap(cmd);
1590 return SCSI_MLQUEUE_HOST_BUSY;
1591 }
1592
1593 scb->io_ctx = cmd;
1594 scb->platform_data->dev = dev;
1595 hscb = scb->hscb;
1596 cmd->host_scribble = (char *)scb;
1597
1598 /*
1599 * Fill out basics of the HSCB.
1600 */
1601 hscb->control = 0;
1602 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1603 hscb->lun = cmd->device->lun;
1604 scb->hscb->task_management = 0;
1605 mask = SCB_GET_TARGET_MASK(ahd, scb);
1606
1607 if ((ahd->user_discenable & mask) != 0)
1608 hscb->control |= DISCENB;
1609
1610 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1611 scb->flags |= SCB_PACKETIZED;
1612
1613 if ((tstate->auto_negotiate & mask) != 0) {
1614 scb->flags |= SCB_AUTO_NEGOTIATE;
1615 scb->hscb->control |= MK_MESSAGE;
1616 }
1617
1618 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1619 int msg_bytes;
1620 uint8_t tag_msgs[2];
1621
1622 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1623 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1624 hscb->control |= tag_msgs[0];
1625 if (tag_msgs[0] == MSG_ORDERED_TASK)
1626 dev->commands_since_idle_or_otag = 0;
1627 } else
1628 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1629 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1630 hscb->control |= MSG_ORDERED_TASK;
1631 dev->commands_since_idle_or_otag = 0;
1632 } else {
1633 hscb->control |= MSG_SIMPLE_TASK;
1634 }
1635 }
1636
1637 hscb->cdb_len = cmd->cmd_len;
1638 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1639
1640 scb->platform_data->xfer_len = 0;
1641 ahd_set_residual(scb, 0);
1642 ahd_set_sense_residual(scb, 0);
1643 scb->sg_count = 0;
1644
1645 if (nseg > 0) {
1646 void *sg = scb->sg_list;
1647 struct scatterlist *cur_seg;
1648 int i;
1649
1650 scb->platform_data->xfer_len = 0;
1651
1652 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1653 dma_addr_t addr;
1654 bus_size_t len;
1655
1656 addr = sg_dma_address(cur_seg);
1657 len = sg_dma_len(cur_seg);
1658 scb->platform_data->xfer_len += len;
1659 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1660 i == (nseg - 1));
1661 }
1662 }
1663
1664 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1665 dev->openings--;
1666 dev->active++;
1667 dev->commands_issued++;
1668
1669 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1670 dev->commands_since_idle_or_otag++;
1671 scb->flags |= SCB_ACTIVE;
1672 ahd_queue_scb(ahd, scb);
1673
1674 ahd_unlock(ahd, &flags);
1675
1676 return 0;
1677 }
1678
1679 /*
1680 * SCSI controller interrupt handler.
1681 */
1682 irqreturn_t
1683 ahd_linux_isr(int irq, void *dev_id)
1684 {
1685 struct ahd_softc *ahd;
1686 u_long flags;
1687 int ours;
1688
1689 ahd = (struct ahd_softc *) dev_id;
1690 ahd_lock(ahd, &flags);
1691 ours = ahd_intr(ahd);
1692 ahd_unlock(ahd, &flags);
1693 return IRQ_RETVAL(ours);
1694 }
1695
1696 void
1697 ahd_send_async(struct ahd_softc *ahd, char channel,
1698 u_int target, u_int lun, ac_code code)
1699 {
1700 switch (code) {
1701 case AC_TRANSFER_NEG:
1702 {
1703 char buf[80];
1704 struct scsi_target *starget;
1705 struct info_str info;
1706 struct ahd_initiator_tinfo *tinfo;
1707 struct ahd_tmode_tstate *tstate;
1708 unsigned int target_ppr_options;
1709
1710 BUG_ON(target == CAM_TARGET_WILDCARD);
1711
1712 info.buffer = buf;
1713 info.length = sizeof(buf);
1714 info.offset = 0;
1715 info.pos = 0;
1716 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1717 target, &tstate);
1718
1719 /*
1720 * Don't bother reporting results while
1721 * negotiations are still pending.
1722 */
1723 if (tinfo->curr.period != tinfo->goal.period
1724 || tinfo->curr.width != tinfo->goal.width
1725 || tinfo->curr.offset != tinfo->goal.offset
1726 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1727 if (bootverbose == 0)
1728 break;
1729
1730 /*
1731 * Don't bother reporting results that
1732 * are identical to those last reported.
1733 */
1734 starget = ahd->platform_data->starget[target];
1735 if (starget == NULL)
1736 break;
1737
1738 target_ppr_options =
1739 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1740 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1741 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1742 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1743 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1744 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1745 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1746 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1747
1748 if (tinfo->curr.period == spi_period(starget)
1749 && tinfo->curr.width == spi_width(starget)
1750 && tinfo->curr.offset == spi_offset(starget)
1751 && tinfo->curr.ppr_options == target_ppr_options)
1752 if (bootverbose == 0)
1753 break;
1754
1755 spi_period(starget) = tinfo->curr.period;
1756 spi_width(starget) = tinfo->curr.width;
1757 spi_offset(starget) = tinfo->curr.offset;
1758 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1759 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1760 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1761 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1762 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1763 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1764 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1765 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1766 spi_display_xfer_agreement(starget);
1767 break;
1768 }
1769 case AC_SENT_BDR:
1770 {
1771 WARN_ON(lun != CAM_LUN_WILDCARD);
1772 scsi_report_device_reset(ahd->platform_data->host,
1773 channel - 'A', target);
1774 break;
1775 }
1776 case AC_BUS_RESET:
1777 if (ahd->platform_data->host != NULL) {
1778 scsi_report_bus_reset(ahd->platform_data->host,
1779 channel - 'A');
1780 }
1781 break;
1782 default:
1783 panic("ahd_send_async: Unexpected async event");
1784 }
1785 }
1786
1787 /*
1788 * Calls the higher level scsi done function and frees the scb.
1789 */
1790 void
1791 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1792 {
1793 struct scsi_cmnd *cmd;
1794 struct ahd_linux_device *dev;
1795
1796 if ((scb->flags & SCB_ACTIVE) == 0) {
1797 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1798 ahd_dump_card_state(ahd);
1799 panic("Stopping for safety");
1800 }
1801 LIST_REMOVE(scb, pending_links);
1802 cmd = scb->io_ctx;
1803 dev = scb->platform_data->dev;
1804 dev->active--;
1805 dev->openings++;
1806 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1807 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1808 dev->qfrozen--;
1809 }
1810 ahd_linux_unmap_scb(ahd, scb);
1811
1812 /*
1813 * Guard against stale sense data.
1814 * The Linux mid-layer assumes that sense
1815 * was retrieved anytime the first byte of
1816 * the sense buffer looks "sane".
1817 */
1818 cmd->sense_buffer[0] = 0;
1819 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1820 uint32_t amount_xferred;
1821
1822 amount_xferred =
1823 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1824 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1825 #ifdef AHD_DEBUG
1826 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1827 ahd_print_path(ahd, scb);
1828 printk("Set CAM_UNCOR_PARITY\n");
1829 }
1830 #endif
1831 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1832 #ifdef AHD_REPORT_UNDERFLOWS
1833 /*
1834 * This code is disabled by default as some
1835 * clients of the SCSI system do not properly
1836 * initialize the underflow parameter. This
1837 * results in spurious termination of commands
1838 * that complete as expected (e.g. underflow is
1839 * allowed as command can return variable amounts
1840 * of data.
1841 */
1842 } else if (amount_xferred < scb->io_ctx->underflow) {
1843 u_int i;
1844
1845 ahd_print_path(ahd, scb);
1846 printk("CDB:");
1847 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1848 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1849 printk("\n");
1850 ahd_print_path(ahd, scb);
1851 printk("Saw underflow (%ld of %ld bytes). "
1852 "Treated as error\n",
1853 ahd_get_residual(scb),
1854 ahd_get_transfer_length(scb));
1855 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1856 #endif
1857 } else {
1858 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1859 }
1860 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1861 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1862 }
1863
1864 if (dev->openings == 1
1865 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1866 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1867 dev->tag_success_count++;
1868 /*
1869 * Some devices deal with temporary internal resource
1870 * shortages by returning queue full. When the queue
1871 * full occurrs, we throttle back. Slowly try to get
1872 * back to our previous queue depth.
1873 */
1874 if ((dev->openings + dev->active) < dev->maxtags
1875 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1876 dev->tag_success_count = 0;
1877 dev->openings++;
1878 }
1879
1880 if (dev->active == 0)
1881 dev->commands_since_idle_or_otag = 0;
1882
1883 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1884 printk("Recovery SCB completes\n");
1885 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1886 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1887 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1888
1889 if (ahd->platform_data->eh_done)
1890 complete(ahd->platform_data->eh_done);
1891 }
1892
1893 ahd_free_scb(ahd, scb);
1894 ahd_linux_queue_cmd_complete(ahd, cmd);
1895 }
1896
1897 static void
1898 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1899 struct scsi_device *sdev, struct scb *scb)
1900 {
1901 struct ahd_devinfo devinfo;
1902 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1903
1904 ahd_compile_devinfo(&devinfo,
1905 ahd->our_id,
1906 sdev->sdev_target->id, sdev->lun,
1907 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1908 ROLE_INITIATOR);
1909
1910 /*
1911 * We don't currently trust the mid-layer to
1912 * properly deal with queue full or busy. So,
1913 * when one occurs, we tell the mid-layer to
1914 * unconditionally requeue the command to us
1915 * so that we can retry it ourselves. We also
1916 * implement our own throttling mechanism so
1917 * we don't clobber the device with too many
1918 * commands.
1919 */
1920 switch (ahd_get_scsi_status(scb)) {
1921 default:
1922 break;
1923 case SCSI_STATUS_CHECK_COND:
1924 case SCSI_STATUS_CMD_TERMINATED:
1925 {
1926 struct scsi_cmnd *cmd;
1927
1928 /*
1929 * Copy sense information to the OS's cmd
1930 * structure if it is available.
1931 */
1932 cmd = scb->io_ctx;
1933 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1934 struct scsi_status_iu_header *siu;
1935 u_int sense_size;
1936 u_int sense_offset;
1937
1938 if (scb->flags & SCB_SENSE) {
1939 sense_size = min(sizeof(struct scsi_sense_data)
1940 - ahd_get_sense_residual(scb),
1941 (u_long)SCSI_SENSE_BUFFERSIZE);
1942 sense_offset = 0;
1943 } else {
1944 /*
1945 * Copy only the sense data into the provided
1946 * buffer.
1947 */
1948 siu = (struct scsi_status_iu_header *)
1949 scb->sense_data;
1950 sense_size = min_t(size_t,
1951 scsi_4btoul(siu->sense_length),
1952 SCSI_SENSE_BUFFERSIZE);
1953 sense_offset = SIU_SENSE_OFFSET(siu);
1954 }
1955
1956 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1957 memcpy(cmd->sense_buffer,
1958 ahd_get_sense_buf(ahd, scb)
1959 + sense_offset, sense_size);
1960 cmd->result |= (DRIVER_SENSE << 24);
1961
1962 #ifdef AHD_DEBUG
1963 if (ahd_debug & AHD_SHOW_SENSE) {
1964 int i;
1965
1966 printk("Copied %d bytes of sense data at %d:",
1967 sense_size, sense_offset);
1968 for (i = 0; i < sense_size; i++) {
1969 if ((i & 0xF) == 0)
1970 printk("\n");
1971 printk("0x%x ", cmd->sense_buffer[i]);
1972 }
1973 printk("\n");
1974 }
1975 #endif
1976 }
1977 break;
1978 }
1979 case SCSI_STATUS_QUEUE_FULL:
1980 /*
1981 * By the time the core driver has returned this
1982 * command, all other commands that were queued
1983 * to us but not the device have been returned.
1984 * This ensures that dev->active is equal to
1985 * the number of commands actually queued to
1986 * the device.
1987 */
1988 dev->tag_success_count = 0;
1989 if (dev->active != 0) {
1990 /*
1991 * Drop our opening count to the number
1992 * of commands currently outstanding.
1993 */
1994 dev->openings = 0;
1995 #ifdef AHD_DEBUG
1996 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1997 ahd_print_path(ahd, scb);
1998 printk("Dropping tag count to %d\n",
1999 dev->active);
2000 }
2001 #endif
2002 if (dev->active == dev->tags_on_last_queuefull) {
2003
2004 dev->last_queuefull_same_count++;
2005 /*
2006 * If we repeatedly see a queue full
2007 * at the same queue depth, this
2008 * device has a fixed number of tag
2009 * slots. Lock in this tag depth
2010 * so we stop seeing queue fulls from
2011 * this device.
2012 */
2013 if (dev->last_queuefull_same_count
2014 == AHD_LOCK_TAGS_COUNT) {
2015 dev->maxtags = dev->active;
2016 ahd_print_path(ahd, scb);
2017 printk("Locking max tag count at %d\n",
2018 dev->active);
2019 }
2020 } else {
2021 dev->tags_on_last_queuefull = dev->active;
2022 dev->last_queuefull_same_count = 0;
2023 }
2024 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
2025 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
2026 ahd_platform_set_tags(ahd, sdev, &devinfo,
2027 (dev->flags & AHD_DEV_Q_BASIC)
2028 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2029 break;
2030 }
2031 /*
2032 * Drop down to a single opening, and treat this
2033 * as if the target returned BUSY SCSI status.
2034 */
2035 dev->openings = 1;
2036 ahd_platform_set_tags(ahd, sdev, &devinfo,
2037 (dev->flags & AHD_DEV_Q_BASIC)
2038 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2039 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
2040 }
2041 }
2042
2043 static void
2044 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
2045 {
2046 int status;
2047 int new_status = DID_OK;
2048 int do_fallback = 0;
2049 int scsi_status;
2050
2051 /*
2052 * Map CAM error codes into Linux Error codes. We
2053 * avoid the conversion so that the DV code has the
2054 * full error information available when making
2055 * state change decisions.
2056 */
2057
2058 status = ahd_cmd_get_transaction_status(cmd);
2059 switch (status) {
2060 case CAM_REQ_INPROG:
2061 case CAM_REQ_CMP:
2062 new_status = DID_OK;
2063 break;
2064 case CAM_AUTOSENSE_FAIL:
2065 new_status = DID_ERROR;
2066 /* Fallthrough */
2067 case CAM_SCSI_STATUS_ERROR:
2068 scsi_status = ahd_cmd_get_scsi_status(cmd);
2069
2070 switch(scsi_status) {
2071 case SCSI_STATUS_CMD_TERMINATED:
2072 case SCSI_STATUS_CHECK_COND:
2073 if ((cmd->result >> 24) != DRIVER_SENSE) {
2074 do_fallback = 1;
2075 } else {
2076 struct scsi_sense_data *sense;
2077
2078 sense = (struct scsi_sense_data *)
2079 cmd->sense_buffer;
2080 if (sense->extra_len >= 5 &&
2081 (sense->add_sense_code == 0x47
2082 || sense->add_sense_code == 0x48))
2083 do_fallback = 1;
2084 }
2085 break;
2086 default:
2087 break;
2088 }
2089 break;
2090 case CAM_REQ_ABORTED:
2091 new_status = DID_ABORT;
2092 break;
2093 case CAM_BUSY:
2094 new_status = DID_BUS_BUSY;
2095 break;
2096 case CAM_REQ_INVALID:
2097 case CAM_PATH_INVALID:
2098 new_status = DID_BAD_TARGET;
2099 break;
2100 case CAM_SEL_TIMEOUT:
2101 new_status = DID_NO_CONNECT;
2102 break;
2103 case CAM_SCSI_BUS_RESET:
2104 case CAM_BDR_SENT:
2105 new_status = DID_RESET;
2106 break;
2107 case CAM_UNCOR_PARITY:
2108 new_status = DID_PARITY;
2109 do_fallback = 1;
2110 break;
2111 case CAM_CMD_TIMEOUT:
2112 new_status = DID_TIME_OUT;
2113 do_fallback = 1;
2114 break;
2115 case CAM_REQ_CMP_ERR:
2116 case CAM_UNEXP_BUSFREE:
2117 case CAM_DATA_RUN_ERR:
2118 new_status = DID_ERROR;
2119 do_fallback = 1;
2120 break;
2121 case CAM_UA_ABORT:
2122 case CAM_NO_HBA:
2123 case CAM_SEQUENCE_FAIL:
2124 case CAM_CCB_LEN_ERR:
2125 case CAM_PROVIDE_FAIL:
2126 case CAM_REQ_TERMIO:
2127 case CAM_UNREC_HBA_ERROR:
2128 case CAM_REQ_TOO_BIG:
2129 new_status = DID_ERROR;
2130 break;
2131 case CAM_REQUEUE_REQ:
2132 new_status = DID_REQUEUE;
2133 break;
2134 default:
2135 /* We should never get here */
2136 new_status = DID_ERROR;
2137 break;
2138 }
2139
2140 if (do_fallback) {
2141 printk("%s: device overrun (status %x) on %d:%d:%d\n",
2142 ahd_name(ahd), status, cmd->device->channel,
2143 cmd->device->id, cmd->device->lun);
2144 }
2145
2146 ahd_cmd_set_transaction_status(cmd, new_status);
2147
2148 cmd->scsi_done(cmd);
2149 }
2150
2151 static void
2152 ahd_freeze_simq(struct ahd_softc *ahd)
2153 {
2154 scsi_block_requests(ahd->platform_data->host);
2155 }
2156
2157 static void
2158 ahd_release_simq(struct ahd_softc *ahd)
2159 {
2160 scsi_unblock_requests(ahd->platform_data->host);
2161 }
2162
2163 static int
2164 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2165 {
2166 struct ahd_softc *ahd;
2167 struct ahd_linux_device *dev;
2168 struct scb *pending_scb;
2169 u_int saved_scbptr;
2170 u_int active_scbptr;
2171 u_int last_phase;
2172 u_int saved_scsiid;
2173 u_int cdb_byte;
2174 int retval;
2175 int was_paused;
2176 int paused;
2177 int wait;
2178 int disconnected;
2179 ahd_mode_state saved_modes;
2180 unsigned long flags;
2181
2182 pending_scb = NULL;
2183 paused = FALSE;
2184 wait = FALSE;
2185 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2186
2187 scmd_printk(KERN_INFO, cmd,
2188 "Attempting to queue an ABORT message:");
2189
2190 printk("CDB:");
2191 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2192 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2193 printk("\n");
2194
2195 ahd_lock(ahd, &flags);
2196
2197 /*
2198 * First determine if we currently own this command.
2199 * Start by searching the device queue. If not found
2200 * there, check the pending_scb list. If not found
2201 * at all, and the system wanted us to just abort the
2202 * command, return success.
2203 */
2204 dev = scsi_transport_device_data(cmd->device);
2205
2206 if (dev == NULL) {
2207 /*
2208 * No target device for this command exists,
2209 * so we must not still own the command.
2210 */
2211 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2212 retval = SUCCESS;
2213 goto no_cmd;
2214 }
2215
2216 /*
2217 * See if we can find a matching cmd in the pending list.
2218 */
2219 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2220 if (pending_scb->io_ctx == cmd)
2221 break;
2222 }
2223
2224 if (pending_scb == NULL) {
2225 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2226 goto no_cmd;
2227 }
2228
2229 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2230 /*
2231 * We can't queue two recovery actions using the same SCB
2232 */
2233 retval = FAILED;
2234 goto done;
2235 }
2236
2237 /*
2238 * Ensure that the card doesn't do anything
2239 * behind our back. Also make sure that we
2240 * didn't "just" miss an interrupt that would
2241 * affect this cmd.
2242 */
2243 was_paused = ahd_is_paused(ahd);
2244 ahd_pause_and_flushwork(ahd);
2245 paused = TRUE;
2246
2247 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2248 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2249 goto no_cmd;
2250 }
2251
2252 printk("%s: At time of recovery, card was %spaused\n",
2253 ahd_name(ahd), was_paused ? "" : "not ");
2254 ahd_dump_card_state(ahd);
2255
2256 disconnected = TRUE;
2257 if (ahd_search_qinfifo(ahd, cmd->device->id,
2258 cmd->device->channel + 'A',
2259 cmd->device->lun,
2260 pending_scb->hscb->tag,
2261 ROLE_INITIATOR, CAM_REQ_ABORTED,
2262 SEARCH_COMPLETE) > 0) {
2263 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2264 ahd_name(ahd), cmd->device->channel,
2265 cmd->device->id, cmd->device->lun);
2266 retval = SUCCESS;
2267 goto done;
2268 }
2269
2270 saved_modes = ahd_save_modes(ahd);
2271 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2272 last_phase = ahd_inb(ahd, LASTPHASE);
2273 saved_scbptr = ahd_get_scbptr(ahd);
2274 active_scbptr = saved_scbptr;
2275 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2276 struct scb *bus_scb;
2277
2278 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2279 if (bus_scb == pending_scb)
2280 disconnected = FALSE;
2281 }
2282
2283 /*
2284 * At this point, pending_scb is the scb associated with the
2285 * passed in command. That command is currently active on the
2286 * bus or is in the disconnected state.
2287 */
2288 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2289 if (last_phase != P_BUSFREE
2290 && SCB_GET_TAG(pending_scb) == active_scbptr) {
2291
2292 /*
2293 * We're active on the bus, so assert ATN
2294 * and hope that the target responds.
2295 */
2296 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2297 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2298 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2299 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2300 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2301 wait = TRUE;
2302 } else if (disconnected) {
2303
2304 /*
2305 * Actually re-queue this SCB in an attempt
2306 * to select the device before it reconnects.
2307 */
2308 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2309 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2310 pending_scb->hscb->cdb_len = 0;
2311 pending_scb->hscb->task_attribute = 0;
2312 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2313
2314 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2315 /*
2316 * Mark the SCB has having an outstanding
2317 * task management function. Should the command
2318 * complete normally before the task management
2319 * function can be sent, the host will be notified
2320 * to abort our requeued SCB.
2321 */
2322 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2323 pending_scb->hscb->task_management);
2324 } else {
2325 /*
2326 * If non-packetized, set the MK_MESSAGE control
2327 * bit indicating that we desire to send a message.
2328 * We also set the disconnected flag since there is
2329 * no guarantee that our SCB control byte matches
2330 * the version on the card. We don't want the
2331 * sequencer to abort the command thinking an
2332 * unsolicited reselection occurred.
2333 */
2334 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2335
2336 /*
2337 * The sequencer will never re-reference the
2338 * in-core SCB. To make sure we are notified
2339 * during reselection, set the MK_MESSAGE flag in
2340 * the card's copy of the SCB.
2341 */
2342 ahd_outb(ahd, SCB_CONTROL,
2343 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2344 }
2345
2346 /*
2347 * Clear out any entries in the QINFIFO first
2348 * so we are the next SCB for this target
2349 * to run.
2350 */
2351 ahd_search_qinfifo(ahd, cmd->device->id,
2352 cmd->device->channel + 'A', cmd->device->lun,
2353 SCB_LIST_NULL, ROLE_INITIATOR,
2354 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2355 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2356 ahd_set_scbptr(ahd, saved_scbptr);
2357 ahd_print_path(ahd, pending_scb);
2358 printk("Device is disconnected, re-queuing SCB\n");
2359 wait = TRUE;
2360 } else {
2361 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2362 retval = FAILED;
2363 goto done;
2364 }
2365
2366 no_cmd:
2367 /*
2368 * Our assumption is that if we don't have the command, no
2369 * recovery action was required, so we return success. Again,
2370 * the semantics of the mid-layer recovery engine are not
2371 * well defined, so this may change in time.
2372 */
2373 retval = SUCCESS;
2374 done:
2375 if (paused)
2376 ahd_unpause(ahd);
2377 if (wait) {
2378 DECLARE_COMPLETION_ONSTACK(done);
2379
2380 ahd->platform_data->eh_done = &done;
2381 ahd_unlock(ahd, &flags);
2382
2383 printk("%s: Recovery code sleeping\n", ahd_name(ahd));
2384 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2385 ahd_lock(ahd, &flags);
2386 ahd->platform_data->eh_done = NULL;
2387 ahd_unlock(ahd, &flags);
2388 printk("%s: Timer Expired (active %d)\n",
2389 ahd_name(ahd), dev->active);
2390 retval = FAILED;
2391 }
2392 printk("Recovery code awake\n");
2393 } else
2394 ahd_unlock(ahd, &flags);
2395
2396 if (retval != SUCCESS)
2397 printk("%s: Command abort returning 0x%x\n",
2398 ahd_name(ahd), retval);
2399
2400 return retval;
2401 }
2402
2403 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2404 {
2405 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2406 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2407 struct ahd_devinfo devinfo;
2408 unsigned long flags;
2409
2410 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2411 starget->channel + 'A', ROLE_INITIATOR);
2412 ahd_lock(ahd, &flags);
2413 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2414 ahd_unlock(ahd, &flags);
2415 }
2416
2417 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2418 {
2419 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2420 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2421 struct ahd_tmode_tstate *tstate;
2422 struct ahd_initiator_tinfo *tinfo
2423 = ahd_fetch_transinfo(ahd,
2424 starget->channel + 'A',
2425 shost->this_id, starget->id, &tstate);
2426 struct ahd_devinfo devinfo;
2427 unsigned int ppr_options = tinfo->goal.ppr_options;
2428 unsigned int dt;
2429 unsigned long flags;
2430 unsigned long offset = tinfo->goal.offset;
2431
2432 #ifdef AHD_DEBUG
2433 if ((ahd_debug & AHD_SHOW_DV) != 0)
2434 printk("%s: set period to %d\n", ahd_name(ahd), period);
2435 #endif
2436 if (offset == 0)
2437 offset = MAX_OFFSET;
2438
2439 if (period < 8)
2440 period = 8;
2441 if (period < 10) {
2442 if (spi_max_width(starget)) {
2443 ppr_options |= MSG_EXT_PPR_DT_REQ;
2444 if (period == 8)
2445 ppr_options |= MSG_EXT_PPR_IU_REQ;
2446 } else
2447 period = 10;
2448 }
2449
2450 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2451
2452 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2453 starget->channel + 'A', ROLE_INITIATOR);
2454
2455 /* all PPR requests apart from QAS require wide transfers */
2456 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2457 if (spi_width(starget) == 0)
2458 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2459 }
2460
2461 ahd_find_syncrate(ahd, &period, &ppr_options,
2462 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2463
2464 ahd_lock(ahd, &flags);
2465 ahd_set_syncrate(ahd, &devinfo, period, offset,
2466 ppr_options, AHD_TRANS_GOAL, FALSE);
2467 ahd_unlock(ahd, &flags);
2468 }
2469
2470 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2471 {
2472 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2473 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2474 struct ahd_tmode_tstate *tstate;
2475 struct ahd_initiator_tinfo *tinfo
2476 = ahd_fetch_transinfo(ahd,
2477 starget->channel + 'A',
2478 shost->this_id, starget->id, &tstate);
2479 struct ahd_devinfo devinfo;
2480 unsigned int ppr_options = 0;
2481 unsigned int period = 0;
2482 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2483 unsigned long flags;
2484
2485 #ifdef AHD_DEBUG
2486 if ((ahd_debug & AHD_SHOW_DV) != 0)
2487 printk("%s: set offset to %d\n", ahd_name(ahd), offset);
2488 #endif
2489
2490 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2491 starget->channel + 'A', ROLE_INITIATOR);
2492 if (offset != 0) {
2493 period = tinfo->goal.period;
2494 ppr_options = tinfo->goal.ppr_options;
2495 ahd_find_syncrate(ahd, &period, &ppr_options,
2496 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2497 }
2498
2499 ahd_lock(ahd, &flags);
2500 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2501 AHD_TRANS_GOAL, FALSE);
2502 ahd_unlock(ahd, &flags);
2503 }
2504
2505 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2506 {
2507 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2508 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2509 struct ahd_tmode_tstate *tstate;
2510 struct ahd_initiator_tinfo *tinfo
2511 = ahd_fetch_transinfo(ahd,
2512 starget->channel + 'A',
2513 shost->this_id, starget->id, &tstate);
2514 struct ahd_devinfo devinfo;
2515 unsigned int ppr_options = tinfo->goal.ppr_options
2516 & ~MSG_EXT_PPR_DT_REQ;
2517 unsigned int period = tinfo->goal.period;
2518 unsigned int width = tinfo->goal.width;
2519 unsigned long flags;
2520
2521 #ifdef AHD_DEBUG
2522 if ((ahd_debug & AHD_SHOW_DV) != 0)
2523 printk("%s: %s DT\n", ahd_name(ahd),
2524 dt ? "enabling" : "disabling");
2525 #endif
2526 if (dt && spi_max_width(starget)) {
2527 ppr_options |= MSG_EXT_PPR_DT_REQ;
2528 if (!width)
2529 ahd_linux_set_width(starget, 1);
2530 } else {
2531 if (period <= 9)
2532 period = 10; /* If resetting DT, period must be >= 25ns */
2533 /* IU is invalid without DT set */
2534 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2535 }
2536 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2537 starget->channel + 'A', ROLE_INITIATOR);
2538 ahd_find_syncrate(ahd, &period, &ppr_options,
2539 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2540
2541 ahd_lock(ahd, &flags);
2542 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2543 ppr_options, AHD_TRANS_GOAL, FALSE);
2544 ahd_unlock(ahd, &flags);
2545 }
2546
2547 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2548 {
2549 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2550 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2551 struct ahd_tmode_tstate *tstate;
2552 struct ahd_initiator_tinfo *tinfo
2553 = ahd_fetch_transinfo(ahd,
2554 starget->channel + 'A',
2555 shost->this_id, starget->id, &tstate);
2556 struct ahd_devinfo devinfo;
2557 unsigned int ppr_options = tinfo->goal.ppr_options
2558 & ~MSG_EXT_PPR_QAS_REQ;
2559 unsigned int period = tinfo->goal.period;
2560 unsigned int dt;
2561 unsigned long flags;
2562
2563 #ifdef AHD_DEBUG
2564 if ((ahd_debug & AHD_SHOW_DV) != 0)
2565 printk("%s: %s QAS\n", ahd_name(ahd),
2566 qas ? "enabling" : "disabling");
2567 #endif
2568
2569 if (qas) {
2570 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2571 }
2572
2573 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2574
2575 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2576 starget->channel + 'A', ROLE_INITIATOR);
2577 ahd_find_syncrate(ahd, &period, &ppr_options,
2578 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2579
2580 ahd_lock(ahd, &flags);
2581 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2582 ppr_options, AHD_TRANS_GOAL, FALSE);
2583 ahd_unlock(ahd, &flags);
2584 }
2585
2586 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2587 {
2588 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2589 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2590 struct ahd_tmode_tstate *tstate;
2591 struct ahd_initiator_tinfo *tinfo
2592 = ahd_fetch_transinfo(ahd,
2593 starget->channel + 'A',
2594 shost->this_id, starget->id, &tstate);
2595 struct ahd_devinfo devinfo;
2596 unsigned int ppr_options = tinfo->goal.ppr_options
2597 & ~MSG_EXT_PPR_IU_REQ;
2598 unsigned int period = tinfo->goal.period;
2599 unsigned int dt;
2600 unsigned long flags;
2601
2602 #ifdef AHD_DEBUG
2603 if ((ahd_debug & AHD_SHOW_DV) != 0)
2604 printk("%s: %s IU\n", ahd_name(ahd),
2605 iu ? "enabling" : "disabling");
2606 #endif
2607
2608 if (iu && spi_max_width(starget)) {
2609 ppr_options |= MSG_EXT_PPR_IU_REQ;
2610 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2611 }
2612
2613 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2614
2615 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2616 starget->channel + 'A', ROLE_INITIATOR);
2617 ahd_find_syncrate(ahd, &period, &ppr_options,
2618 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2619
2620 ahd_lock(ahd, &flags);
2621 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2622 ppr_options, AHD_TRANS_GOAL, FALSE);
2623 ahd_unlock(ahd, &flags);
2624 }
2625
2626 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2627 {
2628 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2629 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2630 struct ahd_tmode_tstate *tstate;
2631 struct ahd_initiator_tinfo *tinfo
2632 = ahd_fetch_transinfo(ahd,
2633 starget->channel + 'A',
2634 shost->this_id, starget->id, &tstate);
2635 struct ahd_devinfo devinfo;
2636 unsigned int ppr_options = tinfo->goal.ppr_options
2637 & ~MSG_EXT_PPR_RD_STRM;
2638 unsigned int period = tinfo->goal.period;
2639 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2640 unsigned long flags;
2641
2642 #ifdef AHD_DEBUG
2643 if ((ahd_debug & AHD_SHOW_DV) != 0)
2644 printk("%s: %s Read Streaming\n", ahd_name(ahd),
2645 rdstrm ? "enabling" : "disabling");
2646 #endif
2647
2648 if (rdstrm && spi_max_width(starget))
2649 ppr_options |= MSG_EXT_PPR_RD_STRM;
2650
2651 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2652 starget->channel + 'A', ROLE_INITIATOR);
2653 ahd_find_syncrate(ahd, &period, &ppr_options,
2654 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2655
2656 ahd_lock(ahd, &flags);
2657 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2658 ppr_options, AHD_TRANS_GOAL, FALSE);
2659 ahd_unlock(ahd, &flags);
2660 }
2661
2662 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2663 {
2664 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2665 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2666 struct ahd_tmode_tstate *tstate;
2667 struct ahd_initiator_tinfo *tinfo
2668 = ahd_fetch_transinfo(ahd,
2669 starget->channel + 'A',
2670 shost->this_id, starget->id, &tstate);
2671 struct ahd_devinfo devinfo;
2672 unsigned int ppr_options = tinfo->goal.ppr_options
2673 & ~MSG_EXT_PPR_WR_FLOW;
2674 unsigned int period = tinfo->goal.period;
2675 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2676 unsigned long flags;
2677
2678 #ifdef AHD_DEBUG
2679 if ((ahd_debug & AHD_SHOW_DV) != 0)
2680 printk("%s: %s Write Flow Control\n", ahd_name(ahd),
2681 wrflow ? "enabling" : "disabling");
2682 #endif
2683
2684 if (wrflow && spi_max_width(starget))
2685 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2686
2687 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2688 starget->channel + 'A', ROLE_INITIATOR);
2689 ahd_find_syncrate(ahd, &period, &ppr_options,
2690 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2691
2692 ahd_lock(ahd, &flags);
2693 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2694 ppr_options, AHD_TRANS_GOAL, FALSE);
2695 ahd_unlock(ahd, &flags);
2696 }
2697
2698 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2699 {
2700 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2701 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2702 struct ahd_tmode_tstate *tstate;
2703 struct ahd_initiator_tinfo *tinfo
2704 = ahd_fetch_transinfo(ahd,
2705 starget->channel + 'A',
2706 shost->this_id, starget->id, &tstate);
2707 struct ahd_devinfo devinfo;
2708 unsigned int ppr_options = tinfo->goal.ppr_options
2709 & ~MSG_EXT_PPR_RTI;
2710 unsigned int period = tinfo->goal.period;
2711 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2712 unsigned long flags;
2713
2714 if ((ahd->features & AHD_RTI) == 0) {
2715 #ifdef AHD_DEBUG
2716 if ((ahd_debug & AHD_SHOW_DV) != 0)
2717 printk("%s: RTI not available\n", ahd_name(ahd));
2718 #endif
2719 return;
2720 }
2721
2722 #ifdef AHD_DEBUG
2723 if ((ahd_debug & AHD_SHOW_DV) != 0)
2724 printk("%s: %s RTI\n", ahd_name(ahd),
2725 rti ? "enabling" : "disabling");
2726 #endif
2727
2728 if (rti && spi_max_width(starget))
2729 ppr_options |= MSG_EXT_PPR_RTI;
2730
2731 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2732 starget->channel + 'A', ROLE_INITIATOR);
2733 ahd_find_syncrate(ahd, &period, &ppr_options,
2734 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2735
2736 ahd_lock(ahd, &flags);
2737 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2738 ppr_options, AHD_TRANS_GOAL, FALSE);
2739 ahd_unlock(ahd, &flags);
2740 }
2741
2742 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2743 {
2744 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2745 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2746 struct ahd_tmode_tstate *tstate;
2747 struct ahd_initiator_tinfo *tinfo
2748 = ahd_fetch_transinfo(ahd,
2749 starget->channel + 'A',
2750 shost->this_id, starget->id, &tstate);
2751 struct ahd_devinfo devinfo;
2752 unsigned int ppr_options = tinfo->goal.ppr_options
2753 & ~MSG_EXT_PPR_PCOMP_EN;
2754 unsigned int period = tinfo->goal.period;
2755 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2756 unsigned long flags;
2757
2758 #ifdef AHD_DEBUG
2759 if ((ahd_debug & AHD_SHOW_DV) != 0)
2760 printk("%s: %s Precompensation\n", ahd_name(ahd),
2761 pcomp ? "Enable" : "Disable");
2762 #endif
2763
2764 if (pcomp && spi_max_width(starget)) {
2765 uint8_t precomp;
2766
2767 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2768 const struct ahd_linux_iocell_opts *iocell_opts;
2769
2770 iocell_opts = &aic79xx_iocell_info[ahd->unit];
2771 precomp = iocell_opts->precomp;
2772 } else {
2773 precomp = AIC79XX_DEFAULT_PRECOMP;
2774 }
2775 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2776 AHD_SET_PRECOMP(ahd, precomp);
2777 } else {
2778 AHD_SET_PRECOMP(ahd, 0);
2779 }
2780
2781 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2782 starget->channel + 'A', ROLE_INITIATOR);
2783 ahd_find_syncrate(ahd, &period, &ppr_options,
2784 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2785
2786 ahd_lock(ahd, &flags);
2787 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2788 ppr_options, AHD_TRANS_GOAL, FALSE);
2789 ahd_unlock(ahd, &flags);
2790 }
2791
2792 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2793 {
2794 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2795 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2796 struct ahd_tmode_tstate *tstate;
2797 struct ahd_initiator_tinfo *tinfo
2798 = ahd_fetch_transinfo(ahd,
2799 starget->channel + 'A',
2800 shost->this_id, starget->id, &tstate);
2801 struct ahd_devinfo devinfo;
2802 unsigned int ppr_options = tinfo->goal.ppr_options
2803 & ~MSG_EXT_PPR_HOLD_MCS;
2804 unsigned int period = tinfo->goal.period;
2805 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2806 unsigned long flags;
2807
2808 if (hold && spi_max_width(starget))
2809 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2810
2811 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2812 starget->channel + 'A', ROLE_INITIATOR);
2813 ahd_find_syncrate(ahd, &period, &ppr_options,
2814 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2815
2816 ahd_lock(ahd, &flags);
2817 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2818 ppr_options, AHD_TRANS_GOAL, FALSE);
2819 ahd_unlock(ahd, &flags);
2820 }
2821
2822 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2823 {
2824 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2825 unsigned long flags;
2826 u8 mode;
2827
2828 ahd_lock(ahd, &flags);
2829 ahd_pause(ahd);
2830 mode = ahd_inb(ahd, SBLKCTL);
2831 ahd_unpause(ahd);
2832 ahd_unlock(ahd, &flags);
2833
2834 if (mode & ENAB40)
2835 spi_signalling(shost) = SPI_SIGNAL_LVD;
2836 else if (mode & ENAB20)
2837 spi_signalling(shost) = SPI_SIGNAL_SE;
2838 else
2839 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2840 }
2841
2842 static struct spi_function_template ahd_linux_transport_functions = {
2843 .set_offset = ahd_linux_set_offset,
2844 .show_offset = 1,
2845 .set_period = ahd_linux_set_period,
2846 .show_period = 1,
2847 .set_width = ahd_linux_set_width,
2848 .show_width = 1,
2849 .set_dt = ahd_linux_set_dt,
2850 .show_dt = 1,
2851 .set_iu = ahd_linux_set_iu,
2852 .show_iu = 1,
2853 .set_qas = ahd_linux_set_qas,
2854 .show_qas = 1,
2855 .set_rd_strm = ahd_linux_set_rd_strm,
2856 .show_rd_strm = 1,
2857 .set_wr_flow = ahd_linux_set_wr_flow,
2858 .show_wr_flow = 1,
2859 .set_rti = ahd_linux_set_rti,
2860 .show_rti = 1,
2861 .set_pcomp_en = ahd_linux_set_pcomp_en,
2862 .show_pcomp_en = 1,
2863 .set_hold_mcs = ahd_linux_set_hold_mcs,
2864 .show_hold_mcs = 1,
2865 .get_signalling = ahd_linux_get_signalling,
2866 };
2867
2868 static int __init
2869 ahd_linux_init(void)
2870 {
2871 int error = 0;
2872
2873 /*
2874 * If we've been passed any parameters, process them now.
2875 */
2876 if (aic79xx)
2877 aic79xx_setup(aic79xx);
2878
2879 ahd_linux_transport_template =
2880 spi_attach_transport(&ahd_linux_transport_functions);
2881 if (!ahd_linux_transport_template)
2882 return -ENODEV;
2883
2884 scsi_transport_reserve_device(ahd_linux_transport_template,
2885 sizeof(struct ahd_linux_device));
2886
2887 error = ahd_linux_pci_init();
2888 if (error)
2889 spi_release_transport(ahd_linux_transport_template);
2890 return error;
2891 }
2892
2893 static void __exit
2894 ahd_linux_exit(void)
2895 {
2896 ahd_linux_pci_exit();
2897 spi_release_transport(ahd_linux_transport_template);
2898 }
2899
2900 module_init(ahd_linux_init);
2901 module_exit(ahd_linux_exit);
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