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WIP FPC-III support
[linux/fpc-iii.git] / drivers / scsi / aic7xxx / aic79xx_osm.c
blobd413b1c5fdc54655969956ed026357b7d67ad234
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 if (bootverbose)
704 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
705
706 ahd_linux_device_queue_depth(sdev);
707
708 /* Initial Domain Validation */
709 if (!spi_initial_dv(sdev->sdev_target))
710 spi_dv_device(sdev);
711
712 return 0;
713 }
714
715 #if defined(__i386__)
716 /*
717 * Return the disk geometry for the given SCSI device.
718 */
719 static int
720 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
721 sector_t capacity, int geom[])
722 {
723 int heads;
724 int sectors;
725 int cylinders;
726 int extended;
727 struct ahd_softc *ahd;
728
729 ahd = *((struct ahd_softc **)sdev->host->hostdata);
730
731 if (scsi_partsize(bdev, capacity, geom))
732 return 0;
733
734 heads = 64;
735 sectors = 32;
736 cylinders = aic_sector_div(capacity, heads, sectors);
737
738 if (aic79xx_extended != 0)
739 extended = 1;
740 else
741 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
742 if (extended && cylinders >= 1024) {
743 heads = 255;
744 sectors = 63;
745 cylinders = aic_sector_div(capacity, heads, sectors);
746 }
747 geom[0] = heads;
748 geom[1] = sectors;
749 geom[2] = cylinders;
750 return (0);
751 }
752 #endif
753
754 /*
755 * Abort the current SCSI command(s).
756 */
757 static int
758 ahd_linux_abort(struct scsi_cmnd *cmd)
759 {
760 int error;
761
762 error = ahd_linux_queue_abort_cmd(cmd);
763
764 return error;
765 }
766
767 /*
768 * Attempt to send a target reset message to the device that timed out.
769 */
770 static int
771 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
772 {
773 struct ahd_softc *ahd;
774 struct ahd_linux_device *dev;
775 struct scb *reset_scb;
776 u_int cdb_byte;
777 int retval = SUCCESS;
778 struct ahd_initiator_tinfo *tinfo;
779 struct ahd_tmode_tstate *tstate;
780 unsigned long flags;
781 DECLARE_COMPLETION_ONSTACK(done);
782
783 reset_scb = NULL;
784
785 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
786
787 scmd_printk(KERN_INFO, cmd,
788 "Attempting to queue a TARGET RESET message:");
789
790 printk("CDB:");
791 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
792 printk(" 0x%x", cmd->cmnd[cdb_byte]);
793 printk("\n");
794
795 /*
796 * Determine if we currently own this command.
797 */
798 dev = scsi_transport_device_data(cmd->device);
799
800 if (dev == NULL) {
801 /*
802 * No target device for this command exists,
803 * so we must not still own the command.
804 */
805 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
806 return SUCCESS;
807 }
808
809 /*
810 * Generate us a new SCB
811 */
812 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
813 if (!reset_scb) {
814 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
815 return FAILED;
816 }
817
818 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
819 cmd->device->id, &tstate);
820 reset_scb->io_ctx = cmd;
821 reset_scb->platform_data->dev = dev;
822 reset_scb->sg_count = 0;
823 ahd_set_residual(reset_scb, 0);
824 ahd_set_sense_residual(reset_scb, 0);
825 reset_scb->platform_data->xfer_len = 0;
826 reset_scb->hscb->control = 0;
827 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
828 reset_scb->hscb->lun = cmd->device->lun;
829 reset_scb->hscb->cdb_len = 0;
830 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
831 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
832 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
833 reset_scb->flags |= SCB_PACKETIZED;
834 } else {
835 reset_scb->hscb->control |= MK_MESSAGE;
836 }
837 dev->openings--;
838 dev->active++;
839 dev->commands_issued++;
840
841 ahd_lock(ahd, &flags);
842
843 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
844 ahd_queue_scb(ahd, reset_scb);
845
846 ahd->platform_data->eh_done = &done;
847 ahd_unlock(ahd, &flags);
848
849 printk("%s: Device reset code sleeping\n", ahd_name(ahd));
850 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
851 ahd_lock(ahd, &flags);
852 ahd->platform_data->eh_done = NULL;
853 ahd_unlock(ahd, &flags);
854 printk("%s: Device reset timer expired (active %d)\n",
855 ahd_name(ahd), dev->active);
856 retval = FAILED;
857 }
858 printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
859
860 return (retval);
861 }
862
863 /*
864 * Reset the SCSI bus.
865 */
866 static int
867 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
868 {
869 struct ahd_softc *ahd;
870 int found;
871 unsigned long flags;
872
873 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
874 #ifdef AHD_DEBUG
875 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
876 printk("%s: Bus reset called for cmd %p\n",
877 ahd_name(ahd), cmd);
878 #endif
879 ahd_lock(ahd, &flags);
880
881 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
882 /*initiate reset*/TRUE);
883 ahd_unlock(ahd, &flags);
884
885 if (bootverbose)
886 printk("%s: SCSI bus reset delivered. "
887 "%d SCBs aborted.\n", ahd_name(ahd), found);
888
889 return (SUCCESS);
890 }
891
892 struct scsi_host_template aic79xx_driver_template = {
893 .module = THIS_MODULE,
894 .name = "aic79xx",
895 .proc_name = "aic79xx",
896 .show_info = ahd_linux_show_info,
897 .write_info = ahd_proc_write_seeprom,
898 .info = ahd_linux_info,
899 .queuecommand = ahd_linux_queue,
900 .eh_abort_handler = ahd_linux_abort,
901 .eh_device_reset_handler = ahd_linux_dev_reset,
902 .eh_bus_reset_handler = ahd_linux_bus_reset,
903 #if defined(__i386__)
904 .bios_param = ahd_linux_biosparam,
905 #endif
906 .can_queue = AHD_MAX_QUEUE,
907 .this_id = -1,
908 .max_sectors = 8192,
909 .cmd_per_lun = 2,
910 .slave_alloc = ahd_linux_slave_alloc,
911 .slave_configure = ahd_linux_slave_configure,
912 .target_alloc = ahd_linux_target_alloc,
913 .target_destroy = ahd_linux_target_destroy,
914 };
915
916 /******************************** Bus DMA *************************************/
917 int
918 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
919 bus_size_t alignment, bus_size_t boundary,
920 dma_addr_t lowaddr, dma_addr_t highaddr,
921 bus_dma_filter_t *filter, void *filterarg,
922 bus_size_t maxsize, int nsegments,
923 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
924 {
925 bus_dma_tag_t dmat;
926
927 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
928 if (dmat == NULL)
929 return (ENOMEM);
930
931 /*
932 * Linux is very simplistic about DMA memory. For now don't
933 * maintain all specification information. Once Linux supplies
934 * better facilities for doing these operations, or the
935 * needs of this particular driver change, we might need to do
936 * more here.
937 */
938 dmat->alignment = alignment;
939 dmat->boundary = boundary;
940 dmat->maxsize = maxsize;
941 *ret_tag = dmat;
942 return (0);
943 }
944
945 void
946 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
947 {
948 kfree(dmat);
949 }
950
951 int
952 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
953 int flags, bus_dmamap_t *mapp)
954 {
955 *vaddr = dma_alloc_coherent(&ahd->dev_softc->dev, dmat->maxsize, mapp,
956 GFP_ATOMIC);
957 if (*vaddr == NULL)
958 return (ENOMEM);
959 return(0);
960 }
961
962 void
963 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
964 void* vaddr, bus_dmamap_t map)
965 {
966 dma_free_coherent(&ahd->dev_softc->dev, dmat->maxsize, vaddr, map);
967 }
968
969 int
970 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
971 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
972 void *cb_arg, int flags)
973 {
974 /*
975 * Assume for now that this will only be used during
976 * initialization and not for per-transaction buffer mapping.
977 */
978 bus_dma_segment_t stack_sg;
979
980 stack_sg.ds_addr = map;
981 stack_sg.ds_len = dmat->maxsize;
982 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
983 return (0);
984 }
985
986 void
987 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
988 {
989 }
990
991 int
992 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
993 {
994 /* Nothing to do */
995 return (0);
996 }
997
998 /********************* Platform Dependent Functions ***************************/
999 static void
1000 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
1001 {
1002
1003 if ((instance >= 0)
1004 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
1005 uint8_t *iocell_info;
1006
1007 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1008 iocell_info[index] = value & 0xFFFF;
1009 if (bootverbose)
1010 printk("iocell[%d:%ld] = %d\n", instance, index, value);
1011 }
1012 }
1013
1014 static void
1015 ahd_linux_setup_tag_info_global(char *p)
1016 {
1017 int tags, i, j;
1018
1019 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1020 printk("Setting Global Tags= %d\n", tags);
1021
1022 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
1023 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1024 aic79xx_tag_info[i].tag_commands[j] = tags;
1025 }
1026 }
1027 }
1028
1029 static void
1030 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1031 {
1032
1033 if ((instance >= 0) && (targ >= 0)
1034 && (instance < ARRAY_SIZE(aic79xx_tag_info))
1035 && (targ < AHD_NUM_TARGETS)) {
1036 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1037 if (bootverbose)
1038 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
1039 }
1040 }
1041
1042 static char *
1043 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
1044 void (*callback)(u_long, int, int, int32_t),
1045 u_long callback_arg)
1046 {
1047 char *tok_end;
1048 char *tok_end2;
1049 int i;
1050 int instance;
1051 int targ;
1052 int done;
1053 char tok_list[] = {'.', ',', '{', '}', '\0'};
1054
1055 /* All options use a ':' name/arg separator */
1056 if (*opt_arg != ':')
1057 return (opt_arg);
1058 opt_arg++;
1059 instance = -1;
1060 targ = -1;
1061 done = FALSE;
1062 /*
1063 * Restore separator that may be in
1064 * the middle of our option argument.
1065 */
1066 tok_end = strchr(opt_arg, '\0');
1067 if (tok_end < end)
1068 *tok_end = ',';
1069 while (!done) {
1070 switch (*opt_arg) {
1071 case '{':
1072 if (instance == -1) {
1073 instance = 0;
1074 } else {
1075 if (depth > 1) {
1076 if (targ == -1)
1077 targ = 0;
1078 } else {
1079 printk("Malformed Option %s\n",
1080 opt_name);
1081 done = TRUE;
1082 }
1083 }
1084 opt_arg++;
1085 break;
1086 case '}':
1087 if (targ != -1)
1088 targ = -1;
1089 else if (instance != -1)
1090 instance = -1;
1091 opt_arg++;
1092 break;
1093 case ',':
1094 case '.':
1095 if (instance == -1)
1096 done = TRUE;
1097 else if (targ >= 0)
1098 targ++;
1099 else if (instance >= 0)
1100 instance++;
1101 opt_arg++;
1102 break;
1103 case '\0':
1104 done = TRUE;
1105 break;
1106 default:
1107 tok_end = end;
1108 for (i = 0; tok_list[i]; i++) {
1109 tok_end2 = strchr(opt_arg, tok_list[i]);
1110 if ((tok_end2) && (tok_end2 < tok_end))
1111 tok_end = tok_end2;
1112 }
1113 callback(callback_arg, instance, targ,
1114 simple_strtol(opt_arg, NULL, 0));
1115 opt_arg = tok_end;
1116 break;
1117 }
1118 }
1119 return (opt_arg);
1120 }
1121
1122 /*
1123 * Handle Linux boot parameters. This routine allows for assigning a value
1124 * to a parameter with a ':' between the parameter and the value.
1125 * ie. aic79xx=stpwlev:1,extended
1126 */
1127 static int
1128 aic79xx_setup(char *s)
1129 {
1130 int i, n;
1131 char *p;
1132 char *end;
1133
1134 static const struct {
1135 const char *name;
1136 uint32_t *flag;
1137 } options[] = {
1138 { "extended", &aic79xx_extended },
1139 { "no_reset", &aic79xx_no_reset },
1140 { "verbose", &aic79xx_verbose },
1141 { "allow_memio", &aic79xx_allow_memio},
1142 #ifdef AHD_DEBUG
1143 { "debug", &ahd_debug },
1144 #endif
1145 { "periodic_otag", &aic79xx_periodic_otag },
1146 { "pci_parity", &aic79xx_pci_parity },
1147 { "seltime", &aic79xx_seltime },
1148 { "tag_info", NULL },
1149 { "global_tag_depth", NULL},
1150 { "slewrate", NULL },
1151 { "precomp", NULL },
1152 { "amplitude", NULL },
1153 { "slowcrc", &aic79xx_slowcrc },
1154 };
1155
1156 end = strchr(s, '\0');
1157
1158 /*
1159 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1160 * will never be 0 in this case.
1161 */
1162 n = 0;
1163
1164 while ((p = strsep(&s, ",.")) != NULL) {
1165 if (*p == '\0')
1166 continue;
1167 for (i = 0; i < ARRAY_SIZE(options); i++) {
1168
1169 n = strlen(options[i].name);
1170 if (strncmp(options[i].name, p, n) == 0)
1171 break;
1172 }
1173 if (i == ARRAY_SIZE(options))
1174 continue;
1175
1176 if (strncmp(p, "global_tag_depth", n) == 0) {
1177 ahd_linux_setup_tag_info_global(p + n);
1178 } else if (strncmp(p, "tag_info", n) == 0) {
1179 s = ahd_parse_brace_option("tag_info", p + n, end,
1180 2, ahd_linux_setup_tag_info, 0);
1181 } else if (strncmp(p, "slewrate", n) == 0) {
1182 s = ahd_parse_brace_option("slewrate",
1183 p + n, end, 1, ahd_linux_setup_iocell_info,
1184 AIC79XX_SLEWRATE_INDEX);
1185 } else if (strncmp(p, "precomp", n) == 0) {
1186 s = ahd_parse_brace_option("precomp",
1187 p + n, end, 1, ahd_linux_setup_iocell_info,
1188 AIC79XX_PRECOMP_INDEX);
1189 } else if (strncmp(p, "amplitude", n) == 0) {
1190 s = ahd_parse_brace_option("amplitude",
1191 p + n, end, 1, ahd_linux_setup_iocell_info,
1192 AIC79XX_AMPLITUDE_INDEX);
1193 } else if (p[n] == ':') {
1194 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1195 } else if (!strncmp(p, "verbose", n)) {
1196 *(options[i].flag) = 1;
1197 } else {
1198 *(options[i].flag) ^= 0xFFFFFFFF;
1199 }
1200 }
1201 return 1;
1202 }
1203
1204 __setup("aic79xx=", aic79xx_setup);
1205
1206 uint32_t aic79xx_verbose;
1207
1208 int
1209 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1210 {
1211 char buf[80];
1212 struct Scsi_Host *host;
1213 char *new_name;
1214 u_long s;
1215 int retval;
1216
1217 template->name = ahd->description;
1218 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1219 if (host == NULL)
1220 return (ENOMEM);
1221
1222 *((struct ahd_softc **)host->hostdata) = ahd;
1223 ahd->platform_data->host = host;
1224 host->can_queue = AHD_MAX_QUEUE;
1225 host->cmd_per_lun = 2;
1226 host->sg_tablesize = AHD_NSEG;
1227 host->this_id = ahd->our_id;
1228 host->irq = ahd->platform_data->irq;
1229 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1230 host->max_lun = AHD_NUM_LUNS;
1231 host->max_channel = 0;
1232 host->sg_tablesize = AHD_NSEG;
1233 ahd_lock(ahd, &s);
1234 ahd_set_unit(ahd, ahd_linux_unit++);
1235 ahd_unlock(ahd, &s);
1236 sprintf(buf, "scsi%d", host->host_no);
1237 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1238 if (new_name != NULL) {
1239 strcpy(new_name, buf);
1240 ahd_set_name(ahd, new_name);
1241 }
1242 host->unique_id = ahd->unit;
1243 ahd_linux_initialize_scsi_bus(ahd);
1244 ahd_intr_enable(ahd, TRUE);
1245
1246 host->transportt = ahd_linux_transport_template;
1247
1248 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1249 if (retval) {
1250 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1251 scsi_host_put(host);
1252 return retval;
1253 }
1254
1255 scsi_scan_host(host);
1256 return 0;
1257 }
1258
1259 /*
1260 * Place the SCSI bus into a known state by either resetting it,
1261 * or forcing transfer negotiations on the next command to any
1262 * target.
1263 */
1264 static void
1265 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1266 {
1267 u_int target_id;
1268 u_int numtarg;
1269 unsigned long s;
1270
1271 target_id = 0;
1272 numtarg = 0;
1273
1274 if (aic79xx_no_reset != 0)
1275 ahd->flags &= ~AHD_RESET_BUS_A;
1276
1277 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1278 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1279 else
1280 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1281
1282 ahd_lock(ahd, &s);
1283
1284 /*
1285 * Force negotiation to async for all targets that
1286 * will not see an initial bus reset.
1287 */
1288 for (; target_id < numtarg; target_id++) {
1289 struct ahd_devinfo devinfo;
1290 struct ahd_initiator_tinfo *tinfo;
1291 struct ahd_tmode_tstate *tstate;
1292
1293 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1294 target_id, &tstate);
1295 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1296 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1297 ahd_update_neg_request(ahd, &devinfo, tstate,
1298 tinfo, AHD_NEG_ALWAYS);
1299 }
1300 ahd_unlock(ahd, &s);
1301 /* Give the bus some time to recover */
1302 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1303 ahd_freeze_simq(ahd);
1304 msleep(AIC79XX_RESET_DELAY);
1305 ahd_release_simq(ahd);
1306 }
1307 }
1308
1309 int
1310 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1311 {
1312 ahd->platform_data =
1313 kzalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC);
1314 if (ahd->platform_data == NULL)
1315 return (ENOMEM);
1316 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1317 ahd_lockinit(ahd);
1318 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1319 return (0);
1320 }
1321
1322 void
1323 ahd_platform_free(struct ahd_softc *ahd)
1324 {
1325 struct scsi_target *starget;
1326 int i;
1327
1328 if (ahd->platform_data != NULL) {
1329 /* destroy all of the device and target objects */
1330 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1331 starget = ahd->platform_data->starget[i];
1332 if (starget != NULL) {
1333 ahd->platform_data->starget[i] = NULL;
1334 }
1335 }
1336
1337 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1338 free_irq(ahd->platform_data->irq, ahd);
1339 if (ahd->tags[0] == BUS_SPACE_PIO
1340 && ahd->bshs[0].ioport != 0)
1341 release_region(ahd->bshs[0].ioport, 256);
1342 if (ahd->tags[1] == BUS_SPACE_PIO
1343 && ahd->bshs[1].ioport != 0)
1344 release_region(ahd->bshs[1].ioport, 256);
1345 if (ahd->tags[0] == BUS_SPACE_MEMIO
1346 && ahd->bshs[0].maddr != NULL) {
1347 iounmap(ahd->bshs[0].maddr);
1348 release_mem_region(ahd->platform_data->mem_busaddr,
1349 0x1000);
1350 }
1351 if (ahd->platform_data->host)
1352 scsi_host_put(ahd->platform_data->host);
1353
1354 kfree(ahd->platform_data);
1355 }
1356 }
1357
1358 void
1359 ahd_platform_init(struct ahd_softc *ahd)
1360 {
1361 /*
1362 * Lookup and commit any modified IO Cell options.
1363 */
1364 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1365 const struct ahd_linux_iocell_opts *iocell_opts;
1366
1367 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1368 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1369 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1370 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1371 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1372 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1373 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1374 }
1375
1376 }
1377
1378 void
1379 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1380 {
1381 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1382 SCB_GET_CHANNEL(ahd, scb),
1383 SCB_GET_LUN(scb), SCB_LIST_NULL,
1384 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1385 }
1386
1387 void
1388 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1389 struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1390 {
1391 struct ahd_linux_device *dev;
1392 int was_queuing;
1393 int now_queuing;
1394
1395 if (sdev == NULL)
1396 return;
1397
1398 dev = scsi_transport_device_data(sdev);
1399
1400 if (dev == NULL)
1401 return;
1402 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1403 switch (alg) {
1404 default:
1405 case AHD_QUEUE_NONE:
1406 now_queuing = 0;
1407 break;
1408 case AHD_QUEUE_BASIC:
1409 now_queuing = AHD_DEV_Q_BASIC;
1410 break;
1411 case AHD_QUEUE_TAGGED:
1412 now_queuing = AHD_DEV_Q_TAGGED;
1413 break;
1414 }
1415 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1416 && (was_queuing != now_queuing)
1417 && (dev->active != 0)) {
1418 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1419 dev->qfrozen++;
1420 }
1421
1422 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1423 if (now_queuing) {
1424 u_int usertags;
1425
1426 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1427 if (!was_queuing) {
1428 /*
1429 * Start out aggressively and allow our
1430 * dynamic queue depth algorithm to take
1431 * care of the rest.
1432 */
1433 dev->maxtags = usertags;
1434 dev->openings = dev->maxtags - dev->active;
1435 }
1436 if (dev->maxtags == 0) {
1437 /*
1438 * Queueing is disabled by the user.
1439 */
1440 dev->openings = 1;
1441 } else if (alg == AHD_QUEUE_TAGGED) {
1442 dev->flags |= AHD_DEV_Q_TAGGED;
1443 if (aic79xx_periodic_otag != 0)
1444 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1445 } else
1446 dev->flags |= AHD_DEV_Q_BASIC;
1447 } else {
1448 /* We can only have one opening. */
1449 dev->maxtags = 0;
1450 dev->openings = 1 - dev->active;
1451 }
1452
1453 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1454 case AHD_DEV_Q_BASIC:
1455 case AHD_DEV_Q_TAGGED:
1456 scsi_change_queue_depth(sdev,
1457 dev->openings + dev->active);
1458 break;
1459 default:
1460 /*
1461 * We allow the OS to queue 2 untagged transactions to
1462 * us at any time even though we can only execute them
1463 * serially on the controller/device. This should
1464 * remove some latency.
1465 */
1466 scsi_change_queue_depth(sdev, 1);
1467 break;
1468 }
1469 }
1470
1471 int
1472 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1473 int lun, u_int tag, role_t role, uint32_t status)
1474 {
1475 return 0;
1476 }
1477
1478 static u_int
1479 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1480 {
1481 static int warned_user;
1482 u_int tags;
1483
1484 tags = 0;
1485 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1486 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1487
1488 if (warned_user == 0) {
1489 printk(KERN_WARNING
1490 "aic79xx: WARNING: Insufficient tag_info instances\n"
1491 "aic79xx: for installed controllers. Using defaults\n"
1492 "aic79xx: Please update the aic79xx_tag_info array in\n"
1493 "aic79xx: the aic79xx_osm.c source file.\n");
1494 warned_user++;
1495 }
1496 tags = AHD_MAX_QUEUE;
1497 } else {
1498 adapter_tag_info_t *tag_info;
1499
1500 tag_info = &aic79xx_tag_info[ahd->unit];
1501 tags = tag_info->tag_commands[devinfo->target_offset];
1502 if (tags > AHD_MAX_QUEUE)
1503 tags = AHD_MAX_QUEUE;
1504 }
1505 }
1506 return (tags);
1507 }
1508
1509 /*
1510 * Determines the queue depth for a given device.
1511 */
1512 static void
1513 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1514 {
1515 struct ahd_devinfo devinfo;
1516 u_int tags;
1517 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1518
1519 ahd_compile_devinfo(&devinfo,
1520 ahd->our_id,
1521 sdev->sdev_target->id, sdev->lun,
1522 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1523 ROLE_INITIATOR);
1524 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1525 if (tags != 0 && sdev->tagged_supported != 0) {
1526
1527 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1528 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1529 devinfo.lun, AC_TRANSFER_NEG);
1530 ahd_print_devinfo(ahd, &devinfo);
1531 printk("Tagged Queuing enabled. Depth %d\n", tags);
1532 } else {
1533 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1534 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1535 devinfo.lun, AC_TRANSFER_NEG);
1536 }
1537 }
1538
1539 static int
1540 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1541 struct scsi_cmnd *cmd)
1542 {
1543 struct scb *scb;
1544 struct hardware_scb *hscb;
1545 struct ahd_initiator_tinfo *tinfo;
1546 struct ahd_tmode_tstate *tstate;
1547 u_int col_idx;
1548 uint16_t mask;
1549 unsigned long flags;
1550 int nseg;
1551
1552 nseg = scsi_dma_map(cmd);
1553 if (nseg < 0)
1554 return SCSI_MLQUEUE_HOST_BUSY;
1555
1556 ahd_lock(ahd, &flags);
1557
1558 /*
1559 * Get an scb to use.
1560 */
1561 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1562 cmd->device->id, &tstate);
1563 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1564 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1565 col_idx = AHD_NEVER_COL_IDX;
1566 } else {
1567 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1568 cmd->device->lun);
1569 }
1570 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1571 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1572 ahd_unlock(ahd, &flags);
1573 scsi_dma_unmap(cmd);
1574 return SCSI_MLQUEUE_HOST_BUSY;
1575 }
1576
1577 scb->io_ctx = cmd;
1578 scb->platform_data->dev = dev;
1579 hscb = scb->hscb;
1580 cmd->host_scribble = (char *)scb;
1581
1582 /*
1583 * Fill out basics of the HSCB.
1584 */
1585 hscb->control = 0;
1586 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1587 hscb->lun = cmd->device->lun;
1588 scb->hscb->task_management = 0;
1589 mask = SCB_GET_TARGET_MASK(ahd, scb);
1590
1591 if ((ahd->user_discenable & mask) != 0)
1592 hscb->control |= DISCENB;
1593
1594 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1595 scb->flags |= SCB_PACKETIZED;
1596
1597 if ((tstate->auto_negotiate & mask) != 0) {
1598 scb->flags |= SCB_AUTO_NEGOTIATE;
1599 scb->hscb->control |= MK_MESSAGE;
1600 }
1601
1602 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1603 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1604 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1605 hscb->control |= MSG_ORDERED_TASK;
1606 dev->commands_since_idle_or_otag = 0;
1607 } else {
1608 hscb->control |= MSG_SIMPLE_TASK;
1609 }
1610 }
1611
1612 hscb->cdb_len = cmd->cmd_len;
1613 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1614
1615 scb->platform_data->xfer_len = 0;
1616 ahd_set_residual(scb, 0);
1617 ahd_set_sense_residual(scb, 0);
1618 scb->sg_count = 0;
1619
1620 if (nseg > 0) {
1621 void *sg = scb->sg_list;
1622 struct scatterlist *cur_seg;
1623 int i;
1624
1625 scb->platform_data->xfer_len = 0;
1626
1627 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1628 dma_addr_t addr;
1629 bus_size_t len;
1630
1631 addr = sg_dma_address(cur_seg);
1632 len = sg_dma_len(cur_seg);
1633 scb->platform_data->xfer_len += len;
1634 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1635 i == (nseg - 1));
1636 }
1637 }
1638
1639 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1640 dev->openings--;
1641 dev->active++;
1642 dev->commands_issued++;
1643
1644 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1645 dev->commands_since_idle_or_otag++;
1646 scb->flags |= SCB_ACTIVE;
1647 ahd_queue_scb(ahd, scb);
1648
1649 ahd_unlock(ahd, &flags);
1650
1651 return 0;
1652 }
1653
1654 /*
1655 * SCSI controller interrupt handler.
1656 */
1657 irqreturn_t
1658 ahd_linux_isr(int irq, void *dev_id)
1659 {
1660 struct ahd_softc *ahd;
1661 u_long flags;
1662 int ours;
1663
1664 ahd = (struct ahd_softc *) dev_id;
1665 ahd_lock(ahd, &flags);
1666 ours = ahd_intr(ahd);
1667 ahd_unlock(ahd, &flags);
1668 return IRQ_RETVAL(ours);
1669 }
1670
1671 void
1672 ahd_send_async(struct ahd_softc *ahd, char channel,
1673 u_int target, u_int lun, ac_code code)
1674 {
1675 switch (code) {
1676 case AC_TRANSFER_NEG:
1677 {
1678 struct scsi_target *starget;
1679 struct ahd_initiator_tinfo *tinfo;
1680 struct ahd_tmode_tstate *tstate;
1681 unsigned int target_ppr_options;
1682
1683 BUG_ON(target == CAM_TARGET_WILDCARD);
1684
1685 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1686 target, &tstate);
1687
1688 /*
1689 * Don't bother reporting results while
1690 * negotiations are still pending.
1691 */
1692 if (tinfo->curr.period != tinfo->goal.period
1693 || tinfo->curr.width != tinfo->goal.width
1694 || tinfo->curr.offset != tinfo->goal.offset
1695 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1696 if (bootverbose == 0)
1697 break;
1698
1699 /*
1700 * Don't bother reporting results that
1701 * are identical to those last reported.
1702 */
1703 starget = ahd->platform_data->starget[target];
1704 if (starget == NULL)
1705 break;
1706
1707 target_ppr_options =
1708 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1709 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1710 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1711 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1712 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1713 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1714 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1715 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1716
1717 if (tinfo->curr.period == spi_period(starget)
1718 && tinfo->curr.width == spi_width(starget)
1719 && tinfo->curr.offset == spi_offset(starget)
1720 && tinfo->curr.ppr_options == target_ppr_options)
1721 if (bootverbose == 0)
1722 break;
1723
1724 spi_period(starget) = tinfo->curr.period;
1725 spi_width(starget) = tinfo->curr.width;
1726 spi_offset(starget) = tinfo->curr.offset;
1727 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1728 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1729 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1730 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1731 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1732 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1733 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1734 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1735 spi_display_xfer_agreement(starget);
1736 break;
1737 }
1738 case AC_SENT_BDR:
1739 {
1740 WARN_ON(lun != CAM_LUN_WILDCARD);
1741 scsi_report_device_reset(ahd->platform_data->host,
1742 channel - 'A', target);
1743 break;
1744 }
1745 case AC_BUS_RESET:
1746 if (ahd->platform_data->host != NULL) {
1747 scsi_report_bus_reset(ahd->platform_data->host,
1748 channel - 'A');
1749 }
1750 break;
1751 default:
1752 panic("ahd_send_async: Unexpected async event");
1753 }
1754 }
1755
1756 /*
1757 * Calls the higher level scsi done function and frees the scb.
1758 */
1759 void
1760 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1761 {
1762 struct scsi_cmnd *cmd;
1763 struct ahd_linux_device *dev;
1764
1765 if ((scb->flags & SCB_ACTIVE) == 0) {
1766 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1767 ahd_dump_card_state(ahd);
1768 panic("Stopping for safety");
1769 }
1770 LIST_REMOVE(scb, pending_links);
1771 cmd = scb->io_ctx;
1772 dev = scb->platform_data->dev;
1773 dev->active--;
1774 dev->openings++;
1775 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1776 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1777 dev->qfrozen--;
1778 }
1779 ahd_linux_unmap_scb(ahd, scb);
1780
1781 /*
1782 * Guard against stale sense data.
1783 * The Linux mid-layer assumes that sense
1784 * was retrieved anytime the first byte of
1785 * the sense buffer looks "sane".
1786 */
1787 cmd->sense_buffer[0] = 0;
1788 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1789 #ifdef AHD_REPORT_UNDERFLOWS
1790 uint32_t amount_xferred;
1791
1792 amount_xferred =
1793 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1794 #endif
1795 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1796 #ifdef AHD_DEBUG
1797 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1798 ahd_print_path(ahd, scb);
1799 printk("Set CAM_UNCOR_PARITY\n");
1800 }
1801 #endif
1802 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1803 #ifdef AHD_REPORT_UNDERFLOWS
1804 /*
1805 * This code is disabled by default as some
1806 * clients of the SCSI system do not properly
1807 * initialize the underflow parameter. This
1808 * results in spurious termination of commands
1809 * that complete as expected (e.g. underflow is
1810 * allowed as command can return variable amounts
1811 * of data.
1812 */
1813 } else if (amount_xferred < scb->io_ctx->underflow) {
1814 u_int i;
1815
1816 ahd_print_path(ahd, scb);
1817 printk("CDB:");
1818 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1819 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1820 printk("\n");
1821 ahd_print_path(ahd, scb);
1822 printk("Saw underflow (%ld of %ld bytes). "
1823 "Treated as error\n",
1824 ahd_get_residual(scb),
1825 ahd_get_transfer_length(scb));
1826 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1827 #endif
1828 } else {
1829 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1830 }
1831 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1832 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1833 }
1834
1835 if (dev->openings == 1
1836 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1837 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1838 dev->tag_success_count++;
1839 /*
1840 * Some devices deal with temporary internal resource
1841 * shortages by returning queue full. When the queue
1842 * full occurrs, we throttle back. Slowly try to get
1843 * back to our previous queue depth.
1844 */
1845 if ((dev->openings + dev->active) < dev->maxtags
1846 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1847 dev->tag_success_count = 0;
1848 dev->openings++;
1849 }
1850
1851 if (dev->active == 0)
1852 dev->commands_since_idle_or_otag = 0;
1853
1854 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1855 printk("Recovery SCB completes\n");
1856 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1857 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1858 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1859
1860 if (ahd->platform_data->eh_done)
1861 complete(ahd->platform_data->eh_done);
1862 }
1863
1864 ahd_free_scb(ahd, scb);
1865 ahd_linux_queue_cmd_complete(ahd, cmd);
1866 }
1867
1868 static void
1869 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1870 struct scsi_device *sdev, struct scb *scb)
1871 {
1872 struct ahd_devinfo devinfo;
1873 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1874
1875 ahd_compile_devinfo(&devinfo,
1876 ahd->our_id,
1877 sdev->sdev_target->id, sdev->lun,
1878 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1879 ROLE_INITIATOR);
1880
1881 /*
1882 * We don't currently trust the mid-layer to
1883 * properly deal with queue full or busy. So,
1884 * when one occurs, we tell the mid-layer to
1885 * unconditionally requeue the command to us
1886 * so that we can retry it ourselves. We also
1887 * implement our own throttling mechanism so
1888 * we don't clobber the device with too many
1889 * commands.
1890 */
1891 switch (ahd_get_scsi_status(scb)) {
1892 default:
1893 break;
1894 case SCSI_STATUS_CHECK_COND:
1895 case SCSI_STATUS_CMD_TERMINATED:
1896 {
1897 struct scsi_cmnd *cmd;
1898
1899 /*
1900 * Copy sense information to the OS's cmd
1901 * structure if it is available.
1902 */
1903 cmd = scb->io_ctx;
1904 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1905 struct scsi_status_iu_header *siu;
1906 u_int sense_size;
1907 u_int sense_offset;
1908
1909 if (scb->flags & SCB_SENSE) {
1910 sense_size = min(sizeof(struct scsi_sense_data)
1911 - ahd_get_sense_residual(scb),
1912 (u_long)SCSI_SENSE_BUFFERSIZE);
1913 sense_offset = 0;
1914 } else {
1915 /*
1916 * Copy only the sense data into the provided
1917 * buffer.
1918 */
1919 siu = (struct scsi_status_iu_header *)
1920 scb->sense_data;
1921 sense_size = min_t(size_t,
1922 scsi_4btoul(siu->sense_length),
1923 SCSI_SENSE_BUFFERSIZE);
1924 sense_offset = SIU_SENSE_OFFSET(siu);
1925 }
1926
1927 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1928 memcpy(cmd->sense_buffer,
1929 ahd_get_sense_buf(ahd, scb)
1930 + sense_offset, sense_size);
1931 cmd->result |= (DRIVER_SENSE << 24);
1932
1933 #ifdef AHD_DEBUG
1934 if (ahd_debug & AHD_SHOW_SENSE) {
1935 int i;
1936
1937 printk("Copied %d bytes of sense data at %d:",
1938 sense_size, sense_offset);
1939 for (i = 0; i < sense_size; i++) {
1940 if ((i & 0xF) == 0)
1941 printk("\n");
1942 printk("0x%x ", cmd->sense_buffer[i]);
1943 }
1944 printk("\n");
1945 }
1946 #endif
1947 }
1948 break;
1949 }
1950 case SCSI_STATUS_QUEUE_FULL:
1951 /*
1952 * By the time the core driver has returned this
1953 * command, all other commands that were queued
1954 * to us but not the device have been returned.
1955 * This ensures that dev->active is equal to
1956 * the number of commands actually queued to
1957 * the device.
1958 */
1959 dev->tag_success_count = 0;
1960 if (dev->active != 0) {
1961 /*
1962 * Drop our opening count to the number
1963 * of commands currently outstanding.
1964 */
1965 dev->openings = 0;
1966 #ifdef AHD_DEBUG
1967 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1968 ahd_print_path(ahd, scb);
1969 printk("Dropping tag count to %d\n",
1970 dev->active);
1971 }
1972 #endif
1973 if (dev->active == dev->tags_on_last_queuefull) {
1974
1975 dev->last_queuefull_same_count++;
1976 /*
1977 * If we repeatedly see a queue full
1978 * at the same queue depth, this
1979 * device has a fixed number of tag
1980 * slots. Lock in this tag depth
1981 * so we stop seeing queue fulls from
1982 * this device.
1983 */
1984 if (dev->last_queuefull_same_count
1985 == AHD_LOCK_TAGS_COUNT) {
1986 dev->maxtags = dev->active;
1987 ahd_print_path(ahd, scb);
1988 printk("Locking max tag count at %d\n",
1989 dev->active);
1990 }
1991 } else {
1992 dev->tags_on_last_queuefull = dev->active;
1993 dev->last_queuefull_same_count = 0;
1994 }
1995 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1996 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1997 ahd_platform_set_tags(ahd, sdev, &devinfo,
1998 (dev->flags & AHD_DEV_Q_BASIC)
1999 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2000 break;
2001 }
2002 /*
2003 * Drop down to a single opening, and treat this
2004 * as if the target returned BUSY SCSI status.
2005 */
2006 dev->openings = 1;
2007 ahd_platform_set_tags(ahd, sdev, &devinfo,
2008 (dev->flags & AHD_DEV_Q_BASIC)
2009 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2010 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
2011 }
2012 }
2013
2014 static void
2015 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
2016 {
2017 int status;
2018 int new_status = DID_OK;
2019 int do_fallback = 0;
2020 int scsi_status;
2021
2022 /*
2023 * Map CAM error codes into Linux Error codes. We
2024 * avoid the conversion so that the DV code has the
2025 * full error information available when making
2026 * state change decisions.
2027 */
2028
2029 status = ahd_cmd_get_transaction_status(cmd);
2030 switch (status) {
2031 case CAM_REQ_INPROG:
2032 case CAM_REQ_CMP:
2033 new_status = DID_OK;
2034 break;
2035 case CAM_AUTOSENSE_FAIL:
2036 new_status = DID_ERROR;
2037 fallthrough;
2038 case CAM_SCSI_STATUS_ERROR:
2039 scsi_status = ahd_cmd_get_scsi_status(cmd);
2040
2041 switch(scsi_status) {
2042 case SCSI_STATUS_CMD_TERMINATED:
2043 case SCSI_STATUS_CHECK_COND:
2044 if ((cmd->result >> 24) != DRIVER_SENSE) {
2045 do_fallback = 1;
2046 } else {
2047 struct scsi_sense_data *sense;
2048
2049 sense = (struct scsi_sense_data *)
2050 cmd->sense_buffer;
2051 if (sense->extra_len >= 5 &&
2052 (sense->add_sense_code == 0x47
2053 || sense->add_sense_code == 0x48))
2054 do_fallback = 1;
2055 }
2056 break;
2057 default:
2058 break;
2059 }
2060 break;
2061 case CAM_REQ_ABORTED:
2062 new_status = DID_ABORT;
2063 break;
2064 case CAM_BUSY:
2065 new_status = DID_BUS_BUSY;
2066 break;
2067 case CAM_REQ_INVALID:
2068 case CAM_PATH_INVALID:
2069 new_status = DID_BAD_TARGET;
2070 break;
2071 case CAM_SEL_TIMEOUT:
2072 new_status = DID_NO_CONNECT;
2073 break;
2074 case CAM_SCSI_BUS_RESET:
2075 case CAM_BDR_SENT:
2076 new_status = DID_RESET;
2077 break;
2078 case CAM_UNCOR_PARITY:
2079 new_status = DID_PARITY;
2080 do_fallback = 1;
2081 break;
2082 case CAM_CMD_TIMEOUT:
2083 new_status = DID_TIME_OUT;
2084 do_fallback = 1;
2085 break;
2086 case CAM_REQ_CMP_ERR:
2087 case CAM_UNEXP_BUSFREE:
2088 case CAM_DATA_RUN_ERR:
2089 new_status = DID_ERROR;
2090 do_fallback = 1;
2091 break;
2092 case CAM_UA_ABORT:
2093 case CAM_NO_HBA:
2094 case CAM_SEQUENCE_FAIL:
2095 case CAM_CCB_LEN_ERR:
2096 case CAM_PROVIDE_FAIL:
2097 case CAM_REQ_TERMIO:
2098 case CAM_UNREC_HBA_ERROR:
2099 case CAM_REQ_TOO_BIG:
2100 new_status = DID_ERROR;
2101 break;
2102 case CAM_REQUEUE_REQ:
2103 new_status = DID_REQUEUE;
2104 break;
2105 default:
2106 /* We should never get here */
2107 new_status = DID_ERROR;
2108 break;
2109 }
2110
2111 if (do_fallback) {
2112 printk("%s: device overrun (status %x) on %d:%d:%d\n",
2113 ahd_name(ahd), status, cmd->device->channel,
2114 cmd->device->id, (u8)cmd->device->lun);
2115 }
2116
2117 ahd_cmd_set_transaction_status(cmd, new_status);
2118
2119 cmd->scsi_done(cmd);
2120 }
2121
2122 static void
2123 ahd_freeze_simq(struct ahd_softc *ahd)
2124 {
2125 scsi_block_requests(ahd->platform_data->host);
2126 }
2127
2128 static void
2129 ahd_release_simq(struct ahd_softc *ahd)
2130 {
2131 scsi_unblock_requests(ahd->platform_data->host);
2132 }
2133
2134 static int
2135 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2136 {
2137 struct ahd_softc *ahd;
2138 struct ahd_linux_device *dev;
2139 struct scb *pending_scb;
2140 u_int saved_scbptr;
2141 u_int active_scbptr;
2142 u_int last_phase;
2143 u_int cdb_byte;
2144 int retval = SUCCESS;
2145 int was_paused;
2146 int paused;
2147 int wait;
2148 int disconnected;
2149 ahd_mode_state saved_modes;
2150 unsigned long flags;
2151
2152 pending_scb = NULL;
2153 paused = FALSE;
2154 wait = FALSE;
2155 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2156
2157 scmd_printk(KERN_INFO, cmd,
2158 "Attempting to queue an ABORT message:");
2159
2160 printk("CDB:");
2161 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2162 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2163 printk("\n");
2164
2165 ahd_lock(ahd, &flags);
2166
2167 /*
2168 * First determine if we currently own this command.
2169 * Start by searching the device queue. If not found
2170 * there, check the pending_scb list. If not found
2171 * at all, and the system wanted us to just abort the
2172 * command, return success.
2173 */
2174 dev = scsi_transport_device_data(cmd->device);
2175
2176 if (dev == NULL) {
2177 /*
2178 * No target device for this command exists,
2179 * so we must not still own the command.
2180 */
2181 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2182 goto done;
2183 }
2184
2185 /*
2186 * See if we can find a matching cmd in the pending list.
2187 */
2188 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2189 if (pending_scb->io_ctx == cmd)
2190 break;
2191 }
2192
2193 if (pending_scb == NULL) {
2194 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2195 goto done;
2196 }
2197
2198 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2199 /*
2200 * We can't queue two recovery actions using the same SCB
2201 */
2202 retval = FAILED;
2203 goto done;
2204 }
2205
2206 /*
2207 * Ensure that the card doesn't do anything
2208 * behind our back. Also make sure that we
2209 * didn't "just" miss an interrupt that would
2210 * affect this cmd.
2211 */
2212 was_paused = ahd_is_paused(ahd);
2213 ahd_pause_and_flushwork(ahd);
2214 paused = TRUE;
2215
2216 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2217 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2218 goto done;
2219 }
2220
2221 printk("%s: At time of recovery, card was %spaused\n",
2222 ahd_name(ahd), was_paused ? "" : "not ");
2223 ahd_dump_card_state(ahd);
2224
2225 disconnected = TRUE;
2226 if (ahd_search_qinfifo(ahd, cmd->device->id,
2227 cmd->device->channel + 'A',
2228 cmd->device->lun,
2229 pending_scb->hscb->tag,
2230 ROLE_INITIATOR, CAM_REQ_ABORTED,
2231 SEARCH_COMPLETE) > 0) {
2232 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2233 ahd_name(ahd), cmd->device->channel,
2234 cmd->device->id, (u8)cmd->device->lun);
2235 goto done;
2236 }
2237
2238 saved_modes = ahd_save_modes(ahd);
2239 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2240 last_phase = ahd_inb(ahd, LASTPHASE);
2241 saved_scbptr = ahd_get_scbptr(ahd);
2242 active_scbptr = saved_scbptr;
2243 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2244 struct scb *bus_scb;
2245
2246 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2247 if (bus_scb == pending_scb)
2248 disconnected = FALSE;
2249 }
2250
2251 /*
2252 * At this point, pending_scb is the scb associated with the
2253 * passed in command. That command is currently active on the
2254 * bus or is in the disconnected state.
2255 */
2256 ahd_inb(ahd, SAVED_SCSIID);
2257 if (last_phase != P_BUSFREE
2258 && SCB_GET_TAG(pending_scb) == active_scbptr) {
2259
2260 /*
2261 * We're active on the bus, so assert ATN
2262 * and hope that the target responds.
2263 */
2264 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2265 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2266 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2267 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2268 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2269 wait = TRUE;
2270 } else if (disconnected) {
2271
2272 /*
2273 * Actually re-queue this SCB in an attempt
2274 * to select the device before it reconnects.
2275 */
2276 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2277 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2278 pending_scb->hscb->cdb_len = 0;
2279 pending_scb->hscb->task_attribute = 0;
2280 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2281
2282 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2283 /*
2284 * Mark the SCB has having an outstanding
2285 * task management function. Should the command
2286 * complete normally before the task management
2287 * function can be sent, the host will be notified
2288 * to abort our requeued SCB.
2289 */
2290 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2291 pending_scb->hscb->task_management);
2292 } else {
2293 /*
2294 * If non-packetized, set the MK_MESSAGE control
2295 * bit indicating that we desire to send a message.
2296 * We also set the disconnected flag since there is
2297 * no guarantee that our SCB control byte matches
2298 * the version on the card. We don't want the
2299 * sequencer to abort the command thinking an
2300 * unsolicited reselection occurred.
2301 */
2302 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2303
2304 /*
2305 * The sequencer will never re-reference the
2306 * in-core SCB. To make sure we are notified
2307 * during reselection, set the MK_MESSAGE flag in
2308 * the card's copy of the SCB.
2309 */
2310 ahd_outb(ahd, SCB_CONTROL,
2311 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2312 }
2313
2314 /*
2315 * Clear out any entries in the QINFIFO first
2316 * so we are the next SCB for this target
2317 * to run.
2318 */
2319 ahd_search_qinfifo(ahd, cmd->device->id,
2320 cmd->device->channel + 'A', cmd->device->lun,
2321 SCB_LIST_NULL, ROLE_INITIATOR,
2322 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2323 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2324 ahd_set_scbptr(ahd, saved_scbptr);
2325 ahd_print_path(ahd, pending_scb);
2326 printk("Device is disconnected, re-queuing SCB\n");
2327 wait = TRUE;
2328 } else {
2329 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2330 retval = FAILED;
2331 }
2332
2333
2334 ahd_restore_modes(ahd, saved_modes);
2335 done:
2336 if (paused)
2337 ahd_unpause(ahd);
2338 if (wait) {
2339 DECLARE_COMPLETION_ONSTACK(done);
2340
2341 ahd->platform_data->eh_done = &done;
2342 ahd_unlock(ahd, &flags);
2343
2344 printk("%s: Recovery code sleeping\n", ahd_name(ahd));
2345 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2346 ahd_lock(ahd, &flags);
2347 ahd->platform_data->eh_done = NULL;
2348 ahd_unlock(ahd, &flags);
2349 printk("%s: Timer Expired (active %d)\n",
2350 ahd_name(ahd), dev->active);
2351 retval = FAILED;
2352 }
2353 printk("Recovery code awake\n");
2354 } else
2355 ahd_unlock(ahd, &flags);
2356
2357 if (retval != SUCCESS)
2358 printk("%s: Command abort returning 0x%x\n",
2359 ahd_name(ahd), retval);
2360
2361 return retval;
2362 }
2363
2364 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2365 {
2366 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2367 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2368 struct ahd_devinfo devinfo;
2369 unsigned long flags;
2370
2371 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2372 starget->channel + 'A', ROLE_INITIATOR);
2373 ahd_lock(ahd, &flags);
2374 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2375 ahd_unlock(ahd, &flags);
2376 }
2377
2378 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2379 {
2380 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2381 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2382 struct ahd_tmode_tstate *tstate;
2383 struct ahd_initiator_tinfo *tinfo
2384 = ahd_fetch_transinfo(ahd,
2385 starget->channel + 'A',
2386 shost->this_id, starget->id, &tstate);
2387 struct ahd_devinfo devinfo;
2388 unsigned int ppr_options = tinfo->goal.ppr_options;
2389 unsigned int dt;
2390 unsigned long flags;
2391 unsigned long offset = tinfo->goal.offset;
2392
2393 #ifdef AHD_DEBUG
2394 if ((ahd_debug & AHD_SHOW_DV) != 0)
2395 printk("%s: set period to %d\n", ahd_name(ahd), period);
2396 #endif
2397 if (offset == 0)
2398 offset = MAX_OFFSET;
2399
2400 if (period < 8)
2401 period = 8;
2402 if (period < 10) {
2403 if (spi_max_width(starget)) {
2404 ppr_options |= MSG_EXT_PPR_DT_REQ;
2405 if (period == 8)
2406 ppr_options |= MSG_EXT_PPR_IU_REQ;
2407 } else
2408 period = 10;
2409 }
2410
2411 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2412
2413 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2414 starget->channel + 'A', ROLE_INITIATOR);
2415
2416 /* all PPR requests apart from QAS require wide transfers */
2417 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2418 if (spi_width(starget) == 0)
2419 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2420 }
2421
2422 ahd_find_syncrate(ahd, &period, &ppr_options,
2423 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2424
2425 ahd_lock(ahd, &flags);
2426 ahd_set_syncrate(ahd, &devinfo, period, offset,
2427 ppr_options, AHD_TRANS_GOAL, FALSE);
2428 ahd_unlock(ahd, &flags);
2429 }
2430
2431 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2432 {
2433 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2434 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2435 struct ahd_tmode_tstate *tstate;
2436 struct ahd_initiator_tinfo *tinfo
2437 = ahd_fetch_transinfo(ahd,
2438 starget->channel + 'A',
2439 shost->this_id, starget->id, &tstate);
2440 struct ahd_devinfo devinfo;
2441 unsigned int ppr_options = 0;
2442 unsigned int period = 0;
2443 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2444 unsigned long flags;
2445
2446 #ifdef AHD_DEBUG
2447 if ((ahd_debug & AHD_SHOW_DV) != 0)
2448 printk("%s: set offset to %d\n", ahd_name(ahd), offset);
2449 #endif
2450
2451 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2452 starget->channel + 'A', ROLE_INITIATOR);
2453 if (offset != 0) {
2454 period = tinfo->goal.period;
2455 ppr_options = tinfo->goal.ppr_options;
2456 ahd_find_syncrate(ahd, &period, &ppr_options,
2457 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2458 }
2459
2460 ahd_lock(ahd, &flags);
2461 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2462 AHD_TRANS_GOAL, FALSE);
2463 ahd_unlock(ahd, &flags);
2464 }
2465
2466 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2467 {
2468 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2469 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2470 struct ahd_tmode_tstate *tstate;
2471 struct ahd_initiator_tinfo *tinfo
2472 = ahd_fetch_transinfo(ahd,
2473 starget->channel + 'A',
2474 shost->this_id, starget->id, &tstate);
2475 struct ahd_devinfo devinfo;
2476 unsigned int ppr_options = tinfo->goal.ppr_options
2477 & ~MSG_EXT_PPR_DT_REQ;
2478 unsigned int period = tinfo->goal.period;
2479 unsigned int width = tinfo->goal.width;
2480 unsigned long flags;
2481
2482 #ifdef AHD_DEBUG
2483 if ((ahd_debug & AHD_SHOW_DV) != 0)
2484 printk("%s: %s DT\n", ahd_name(ahd),
2485 dt ? "enabling" : "disabling");
2486 #endif
2487 if (dt && spi_max_width(starget)) {
2488 ppr_options |= MSG_EXT_PPR_DT_REQ;
2489 if (!width)
2490 ahd_linux_set_width(starget, 1);
2491 } else {
2492 if (period <= 9)
2493 period = 10; /* If resetting DT, period must be >= 25ns */
2494 /* IU is invalid without DT set */
2495 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2496 }
2497 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2498 starget->channel + 'A', ROLE_INITIATOR);
2499 ahd_find_syncrate(ahd, &period, &ppr_options,
2500 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2501
2502 ahd_lock(ahd, &flags);
2503 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2504 ppr_options, AHD_TRANS_GOAL, FALSE);
2505 ahd_unlock(ahd, &flags);
2506 }
2507
2508 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2509 {
2510 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2511 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2512 struct ahd_tmode_tstate *tstate;
2513 struct ahd_initiator_tinfo *tinfo
2514 = ahd_fetch_transinfo(ahd,
2515 starget->channel + 'A',
2516 shost->this_id, starget->id, &tstate);
2517 struct ahd_devinfo devinfo;
2518 unsigned int ppr_options = tinfo->goal.ppr_options
2519 & ~MSG_EXT_PPR_QAS_REQ;
2520 unsigned int period = tinfo->goal.period;
2521 unsigned int dt;
2522 unsigned long flags;
2523
2524 #ifdef AHD_DEBUG
2525 if ((ahd_debug & AHD_SHOW_DV) != 0)
2526 printk("%s: %s QAS\n", ahd_name(ahd),
2527 qas ? "enabling" : "disabling");
2528 #endif
2529
2530 if (qas) {
2531 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2532 }
2533
2534 dt = ppr_options & MSG_EXT_PPR_DT_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_iu(struct scsi_target *starget, int iu)
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_IU_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 IU\n", ahd_name(ahd),
2566 iu ? "enabling" : "disabling");
2567 #endif
2568
2569 if (iu && spi_max_width(starget)) {
2570 ppr_options |= MSG_EXT_PPR_IU_REQ;
2571 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2572 }
2573
2574 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2575
2576 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2577 starget->channel + 'A', ROLE_INITIATOR);
2578 ahd_find_syncrate(ahd, &period, &ppr_options,
2579 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2580
2581 ahd_lock(ahd, &flags);
2582 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2583 ppr_options, AHD_TRANS_GOAL, FALSE);
2584 ahd_unlock(ahd, &flags);
2585 }
2586
2587 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2588 {
2589 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2590 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2591 struct ahd_tmode_tstate *tstate;
2592 struct ahd_initiator_tinfo *tinfo
2593 = ahd_fetch_transinfo(ahd,
2594 starget->channel + 'A',
2595 shost->this_id, starget->id, &tstate);
2596 struct ahd_devinfo devinfo;
2597 unsigned int ppr_options = tinfo->goal.ppr_options
2598 & ~MSG_EXT_PPR_RD_STRM;
2599 unsigned int period = tinfo->goal.period;
2600 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2601 unsigned long flags;
2602
2603 #ifdef AHD_DEBUG
2604 if ((ahd_debug & AHD_SHOW_DV) != 0)
2605 printk("%s: %s Read Streaming\n", ahd_name(ahd),
2606 rdstrm ? "enabling" : "disabling");
2607 #endif
2608
2609 if (rdstrm && spi_max_width(starget))
2610 ppr_options |= MSG_EXT_PPR_RD_STRM;
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_wr_flow(struct scsi_target *starget, int wrflow)
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_WR_FLOW;
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 Write Flow Control\n", ahd_name(ahd),
2642 wrflow ? "enabling" : "disabling");
2643 #endif
2644
2645 if (wrflow && spi_max_width(starget))
2646 ppr_options |= MSG_EXT_PPR_WR_FLOW;
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_rti(struct scsi_target *starget, int rti)
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_RTI;
2671 unsigned int period = tinfo->goal.period;
2672 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2673 unsigned long flags;
2674
2675 if ((ahd->features & AHD_RTI) == 0) {
2676 #ifdef AHD_DEBUG
2677 if ((ahd_debug & AHD_SHOW_DV) != 0)
2678 printk("%s: RTI not available\n", ahd_name(ahd));
2679 #endif
2680 return;
2681 }
2682
2683 #ifdef AHD_DEBUG
2684 if ((ahd_debug & AHD_SHOW_DV) != 0)
2685 printk("%s: %s RTI\n", ahd_name(ahd),
2686 rti ? "enabling" : "disabling");
2687 #endif
2688
2689 if (rti && spi_max_width(starget))
2690 ppr_options |= MSG_EXT_PPR_RTI;
2691
2692 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2693 starget->channel + 'A', ROLE_INITIATOR);
2694 ahd_find_syncrate(ahd, &period, &ppr_options,
2695 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2696
2697 ahd_lock(ahd, &flags);
2698 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2699 ppr_options, AHD_TRANS_GOAL, FALSE);
2700 ahd_unlock(ahd, &flags);
2701 }
2702
2703 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2704 {
2705 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2706 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2707 struct ahd_tmode_tstate *tstate;
2708 struct ahd_initiator_tinfo *tinfo
2709 = ahd_fetch_transinfo(ahd,
2710 starget->channel + 'A',
2711 shost->this_id, starget->id, &tstate);
2712 struct ahd_devinfo devinfo;
2713 unsigned int ppr_options = tinfo->goal.ppr_options
2714 & ~MSG_EXT_PPR_PCOMP_EN;
2715 unsigned int period = tinfo->goal.period;
2716 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2717 unsigned long flags;
2718
2719 #ifdef AHD_DEBUG
2720 if ((ahd_debug & AHD_SHOW_DV) != 0)
2721 printk("%s: %s Precompensation\n", ahd_name(ahd),
2722 pcomp ? "Enable" : "Disable");
2723 #endif
2724
2725 if (pcomp && spi_max_width(starget)) {
2726 uint8_t precomp;
2727
2728 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2729 const struct ahd_linux_iocell_opts *iocell_opts;
2730
2731 iocell_opts = &aic79xx_iocell_info[ahd->unit];
2732 precomp = iocell_opts->precomp;
2733 } else {
2734 precomp = AIC79XX_DEFAULT_PRECOMP;
2735 }
2736 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2737 AHD_SET_PRECOMP(ahd, precomp);
2738 } else {
2739 AHD_SET_PRECOMP(ahd, 0);
2740 }
2741
2742 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2743 starget->channel + 'A', ROLE_INITIATOR);
2744 ahd_find_syncrate(ahd, &period, &ppr_options,
2745 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2746
2747 ahd_lock(ahd, &flags);
2748 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2749 ppr_options, AHD_TRANS_GOAL, FALSE);
2750 ahd_unlock(ahd, &flags);
2751 }
2752
2753 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2754 {
2755 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2756 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2757 struct ahd_tmode_tstate *tstate;
2758 struct ahd_initiator_tinfo *tinfo
2759 = ahd_fetch_transinfo(ahd,
2760 starget->channel + 'A',
2761 shost->this_id, starget->id, &tstate);
2762 struct ahd_devinfo devinfo;
2763 unsigned int ppr_options = tinfo->goal.ppr_options
2764 & ~MSG_EXT_PPR_HOLD_MCS;
2765 unsigned int period = tinfo->goal.period;
2766 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2767 unsigned long flags;
2768
2769 if (hold && spi_max_width(starget))
2770 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2771
2772 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2773 starget->channel + 'A', ROLE_INITIATOR);
2774 ahd_find_syncrate(ahd, &period, &ppr_options,
2775 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2776
2777 ahd_lock(ahd, &flags);
2778 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2779 ppr_options, AHD_TRANS_GOAL, FALSE);
2780 ahd_unlock(ahd, &flags);
2781 }
2782
2783 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2784 {
2785 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2786 unsigned long flags;
2787 u8 mode;
2788
2789 ahd_lock(ahd, &flags);
2790 ahd_pause(ahd);
2791 mode = ahd_inb(ahd, SBLKCTL);
2792 ahd_unpause(ahd);
2793 ahd_unlock(ahd, &flags);
2794
2795 if (mode & ENAB40)
2796 spi_signalling(shost) = SPI_SIGNAL_LVD;
2797 else if (mode & ENAB20)
2798 spi_signalling(shost) = SPI_SIGNAL_SE;
2799 else
2800 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2801 }
2802
2803 static struct spi_function_template ahd_linux_transport_functions = {
2804 .set_offset = ahd_linux_set_offset,
2805 .show_offset = 1,
2806 .set_period = ahd_linux_set_period,
2807 .show_period = 1,
2808 .set_width = ahd_linux_set_width,
2809 .show_width = 1,
2810 .set_dt = ahd_linux_set_dt,
2811 .show_dt = 1,
2812 .set_iu = ahd_linux_set_iu,
2813 .show_iu = 1,
2814 .set_qas = ahd_linux_set_qas,
2815 .show_qas = 1,
2816 .set_rd_strm = ahd_linux_set_rd_strm,
2817 .show_rd_strm = 1,
2818 .set_wr_flow = ahd_linux_set_wr_flow,
2819 .show_wr_flow = 1,
2820 .set_rti = ahd_linux_set_rti,
2821 .show_rti = 1,
2822 .set_pcomp_en = ahd_linux_set_pcomp_en,
2823 .show_pcomp_en = 1,
2824 .set_hold_mcs = ahd_linux_set_hold_mcs,
2825 .show_hold_mcs = 1,
2826 .get_signalling = ahd_linux_get_signalling,
2827 };
2828
2829 static int __init
2830 ahd_linux_init(void)
2831 {
2832 int error = 0;
2833
2834 /*
2835 * If we've been passed any parameters, process them now.
2836 */
2837 if (aic79xx)
2838 aic79xx_setup(aic79xx);
2839
2840 ahd_linux_transport_template =
2841 spi_attach_transport(&ahd_linux_transport_functions);
2842 if (!ahd_linux_transport_template)
2843 return -ENODEV;
2844
2845 scsi_transport_reserve_device(ahd_linux_transport_template,
2846 sizeof(struct ahd_linux_device));
2847
2848 error = ahd_linux_pci_init();
2849 if (error)
2850 spi_release_transport(ahd_linux_transport_template);
2851 return error;
2852 }
2853
2854 static void __exit
2855 ahd_linux_exit(void)
2856 {
2857 ahd_linux_pci_exit();
2858 spi_release_transport(ahd_linux_transport_template);
2859 }
2860
2861 module_init(ahd_linux_init);
2862 module_exit(ahd_linux_exit);
Linux with added FPC-III support