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mm/zsmalloc: allocate exactly size of struct zs_pool
[linux/fpc-iii.git] / drivers / scsi / aic7xxx / aic79xx_osm.c
blobd5c7b193d8d3d6c86e3432d478ce1e6385ddbf06
1 /*
2 * Adaptec AIC79xx device driver for Linux.
3 *
4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $
5 *
6 * --------------------------------------------------------------------------
7 * Copyright (c) 1994-2000 Justin T. Gibbs.
8 * Copyright (c) 1997-1999 Doug Ledford
9 * Copyright (c) 2000-2003 Adaptec Inc.
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the following disclaimer,
17 * without modification.
18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19 * substantially similar to the "NO WARRANTY" disclaimer below
20 * ("Disclaimer") and any redistribution must be conditioned upon
21 * including a substantially similar Disclaimer requirement for further
22 * binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
30 *
31 * NO WARRANTY
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGES.
43 */
44
45 #include "aic79xx_osm.h"
46 #include "aic79xx_inline.h"
47 #include <scsi/scsicam.h>
48
49 static struct scsi_transport_template *ahd_linux_transport_template = NULL;
50
51 #include <linux/init.h> /* __setup */
52 #include <linux/mm.h> /* For fetching system memory size */
53 #include <linux/blkdev.h> /* For block_size() */
54 #include <linux/delay.h> /* For ssleep/msleep */
55 #include <linux/device.h>
56 #include <linux/slab.h>
57
58 /*
59 * Bucket size for counting good commands in between bad ones.
60 */
61 #define AHD_LINUX_ERR_THRESH 1000
62
63 /*
64 * Set this to the delay in seconds after SCSI bus reset.
65 * Note, we honor this only for the initial bus reset.
66 * The scsi error recovery code performs its own bus settle
67 * delay handling for error recovery actions.
68 */
69 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS
70 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
71 #else
72 #define AIC79XX_RESET_DELAY 5000
73 #endif
74
75 /*
76 * To change the default number of tagged transactions allowed per-device,
77 * add a line to the lilo.conf file like:
78 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
79 * which will result in the first four devices on the first two
80 * controllers being set to a tagged queue depth of 32.
81 *
82 * The tag_commands is an array of 16 to allow for wide and twin adapters.
83 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
84 * for channel 1.
85 */
86 typedef struct {
87 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */
88 } adapter_tag_info_t;
89
90 /*
91 * Modify this as you see fit for your system.
92 *
93 * 0 tagged queuing disabled
94 * 1 <= n <= 253 n == max tags ever dispatched.
95 *
96 * The driver will throttle the number of commands dispatched to a
97 * device if it returns queue full. For devices with a fixed maximum
98 * queue depth, the driver will eventually determine this depth and
99 * lock it in (a console message is printed to indicate that a lock
100 * has occurred). On some devices, queue full is returned for a temporary
101 * resource shortage. These devices will return queue full at varying
102 * depths. The driver will throttle back when the queue fulls occur and
103 * attempt to slowly increase the depth over time as the device recovers
104 * from the resource shortage.
105 *
106 * In this example, the first line will disable tagged queueing for all
107 * the devices on the first probed aic79xx adapter.
108 *
109 * The second line enables tagged queueing with 4 commands/LUN for IDs
110 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
111 * driver to attempt to use up to 64 tags for ID 1.
112 *
113 * The third line is the same as the first line.
114 *
115 * The fourth line disables tagged queueing for devices 0 and 3. It
116 * enables tagged queueing for the other IDs, with 16 commands/LUN
117 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
118 * IDs 2, 5-7, and 9-15.
119 */
120
121 /*
122 * NOTE: The below structure is for reference only, the actual structure
123 * to modify in order to change things is just below this comment block.
124 adapter_tag_info_t aic79xx_tag_info[] =
125 {
126 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
127 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
128 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
129 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
130 };
131 */
132
133 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
134 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
135 #else
136 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
137 #endif
138
139 #define AIC79XX_CONFIGED_TAG_COMMANDS { \
140 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
141 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
142 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
143 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
144 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
145 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
146 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
147 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \
148 }
149
150 /*
151 * By default, use the number of commands specified by
152 * the users kernel configuration.
153 */
154 static adapter_tag_info_t aic79xx_tag_info[] =
155 {
156 {AIC79XX_CONFIGED_TAG_COMMANDS},
157 {AIC79XX_CONFIGED_TAG_COMMANDS},
158 {AIC79XX_CONFIGED_TAG_COMMANDS},
159 {AIC79XX_CONFIGED_TAG_COMMANDS},
160 {AIC79XX_CONFIGED_TAG_COMMANDS},
161 {AIC79XX_CONFIGED_TAG_COMMANDS},
162 {AIC79XX_CONFIGED_TAG_COMMANDS},
163 {AIC79XX_CONFIGED_TAG_COMMANDS},
164 {AIC79XX_CONFIGED_TAG_COMMANDS},
165 {AIC79XX_CONFIGED_TAG_COMMANDS},
166 {AIC79XX_CONFIGED_TAG_COMMANDS},
167 {AIC79XX_CONFIGED_TAG_COMMANDS},
168 {AIC79XX_CONFIGED_TAG_COMMANDS},
169 {AIC79XX_CONFIGED_TAG_COMMANDS},
170 {AIC79XX_CONFIGED_TAG_COMMANDS},
171 {AIC79XX_CONFIGED_TAG_COMMANDS}
172 };
173
174 /*
175 * The I/O cell on the chip is very configurable in respect to its analog
176 * characteristics. Set the defaults here; they can be overriden with
177 * the proper insmod parameters.
178 */
179 struct ahd_linux_iocell_opts
180 {
181 uint8_t precomp;
182 uint8_t slewrate;
183 uint8_t amplitude;
184 };
185 #define AIC79XX_DEFAULT_PRECOMP 0xFF
186 #define AIC79XX_DEFAULT_SLEWRATE 0xFF
187 #define AIC79XX_DEFAULT_AMPLITUDE 0xFF
188 #define AIC79XX_DEFAULT_IOOPTS \
189 { \
190 AIC79XX_DEFAULT_PRECOMP, \
191 AIC79XX_DEFAULT_SLEWRATE, \
192 AIC79XX_DEFAULT_AMPLITUDE \
193 }
194 #define AIC79XX_PRECOMP_INDEX 0
195 #define AIC79XX_SLEWRATE_INDEX 1
196 #define AIC79XX_AMPLITUDE_INDEX 2
197 static const struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
198 {
199 AIC79XX_DEFAULT_IOOPTS,
200 AIC79XX_DEFAULT_IOOPTS,
201 AIC79XX_DEFAULT_IOOPTS,
202 AIC79XX_DEFAULT_IOOPTS,
203 AIC79XX_DEFAULT_IOOPTS,
204 AIC79XX_DEFAULT_IOOPTS,
205 AIC79XX_DEFAULT_IOOPTS,
206 AIC79XX_DEFAULT_IOOPTS,
207 AIC79XX_DEFAULT_IOOPTS,
208 AIC79XX_DEFAULT_IOOPTS,
209 AIC79XX_DEFAULT_IOOPTS,
210 AIC79XX_DEFAULT_IOOPTS,
211 AIC79XX_DEFAULT_IOOPTS,
212 AIC79XX_DEFAULT_IOOPTS,
213 AIC79XX_DEFAULT_IOOPTS,
214 AIC79XX_DEFAULT_IOOPTS
215 };
216
217 /*
218 * There should be a specific return value for this in scsi.h, but
219 * it seems that most drivers ignore it.
220 */
221 #define DID_UNDERFLOW DID_ERROR
222
223 void
224 ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
225 {
226 printk("(scsi%d:%c:%d:%d): ",
227 ahd->platform_data->host->host_no,
228 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
229 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
230 scb != NULL ? SCB_GET_LUN(scb) : -1);
231 }
232
233 /*
234 * XXX - these options apply unilaterally to _all_ adapters
235 * cards in the system. This should be fixed. Exceptions to this
236 * rule are noted in the comments.
237 */
238
239 /*
240 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
241 * has no effect on any later resets that might occur due to things like
242 * SCSI bus timeouts.
243 */
244 static uint32_t aic79xx_no_reset;
245
246 /*
247 * Should we force EXTENDED translation on a controller.
248 * 0 == Use whatever is in the SEEPROM or default to off
249 * 1 == Use whatever is in the SEEPROM or default to on
250 */
251 static uint32_t aic79xx_extended;
252
253 /*
254 * PCI bus parity checking of the Adaptec controllers. This is somewhat
255 * dubious at best. To my knowledge, this option has never actually
256 * solved a PCI parity problem, but on certain machines with broken PCI
257 * chipset configurations, it can generate tons of false error messages.
258 * It's included in the driver for completeness.
259 * 0 = Shut off PCI parity check
260 * non-0 = Enable PCI parity check
261 *
262 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
263 * variable to -1 you would actually want to simply pass the variable
264 * name without a number. That will invert the 0 which will result in
265 * -1.
266 */
267 static uint32_t aic79xx_pci_parity = ~0;
268
269 /*
270 * There are lots of broken chipsets in the world. Some of them will
271 * violate the PCI spec when we issue byte sized memory writes to our
272 * controller. I/O mapped register access, if allowed by the given
273 * platform, will work in almost all cases.
274 */
275 uint32_t aic79xx_allow_memio = ~0;
276
277 /*
278 * So that we can set how long each device is given as a selection timeout.
279 * The table of values goes like this:
280 * 0 - 256ms
281 * 1 - 128ms
282 * 2 - 64ms
283 * 3 - 32ms
284 * We default to 256ms because some older devices need a longer time
285 * to respond to initial selection.
286 */
287 static uint32_t aic79xx_seltime;
288
289 /*
290 * Certain devices do not perform any aging on commands. Should the
291 * device be saturated by commands in one portion of the disk, it is
292 * possible for transactions on far away sectors to never be serviced.
293 * To handle these devices, we can periodically send an ordered tag to
294 * force all outstanding transactions to be serviced prior to a new
295 * transaction.
296 */
297 static uint32_t aic79xx_periodic_otag;
298
299 /* Some storage boxes are using an LSI chip which has a bug making it
300 * impossible to use aic79xx Rev B chip in 320 speeds. The following
301 * storage boxes have been reported to be buggy:
302 * EonStor 3U 16-Bay: U16U-G3A3
303 * EonStor 2U 12-Bay: U12U-G3A3
304 * SentinelRAID: 2500F R5 / R6
305 * SentinelRAID: 2500F R1
306 * SentinelRAID: 2500F/1500F
307 * SentinelRAID: 150F
308 *
309 * To get around this LSI bug, you can set your board to 160 mode
310 * or you can enable the SLOWCRC bit.
311 */
312 uint32_t aic79xx_slowcrc;
313
314 /*
315 * Module information and settable options.
316 */
317 static char *aic79xx = NULL;
318
319 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
320 MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver");
321 MODULE_LICENSE("Dual BSD/GPL");
322 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
323 module_param(aic79xx, charp, 0444);
324 MODULE_PARM_DESC(aic79xx,
325 "period-delimited options string:\n"
326 " verbose Enable verbose/diagnostic logging\n"
327 " allow_memio Allow device registers to be memory mapped\n"
328 " debug Bitmask of debug values to enable\n"
329 " no_reset Suppress initial bus resets\n"
330 " extended Enable extended geometry on all controllers\n"
331 " periodic_otag Send an ordered tagged transaction\n"
332 " periodically to prevent tag starvation.\n"
333 " This may be required by some older disk\n"
334 " or drives/RAID arrays.\n"
335 " tag_info:<tag_str> Set per-target tag depth\n"
336 " global_tag_depth:<int> Global tag depth for all targets on all buses\n"
337 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
338 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
339 " amplitude:<int> Set the signal amplitude (0-7).\n"
340 " seltime:<int> Selection Timeout:\n"
341 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
342 " slowcrc Turn on the SLOWCRC bit (Rev B only)\n"
343 "\n"
344 " Sample modprobe configuration file:\n"
345 " # Enable verbose logging\n"
346 " # Set tag depth on Controller 2/Target 2 to 10 tags\n"
347 " # Shorten the selection timeout to 128ms\n"
348 "\n"
349 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
350 );
351
352 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
353 struct scsi_device *,
354 struct scb *);
355 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
356 struct scsi_cmnd *cmd);
357 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
358 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
359 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
360 struct ahd_devinfo *devinfo);
361 static void ahd_linux_device_queue_depth(struct scsi_device *);
362 static int ahd_linux_run_command(struct ahd_softc*,
363 struct ahd_linux_device *,
364 struct scsi_cmnd *);
365 static void ahd_linux_setup_tag_info_global(char *p);
366 static int aic79xx_setup(char *c);
367 static void ahd_freeze_simq(struct ahd_softc *ahd);
368 static void ahd_release_simq(struct ahd_softc *ahd);
369
370 static int ahd_linux_unit;
371
372
373 /************************** OS Utility Wrappers *******************************/
374 void ahd_delay(long);
375 void
376 ahd_delay(long usec)
377 {
378 /*
379 * udelay on Linux can have problems for
380 * multi-millisecond waits. Wait at most
381 * 1024us per call.
382 */
383 while (usec > 0) {
384 udelay(usec % 1024);
385 usec -= 1024;
386 }
387 }
388
389
390 /***************************** Low Level I/O **********************************/
391 uint8_t ahd_inb(struct ahd_softc * ahd, long port);
392 void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
393 void ahd_outw_atomic(struct ahd_softc * ahd,
394 long port, uint16_t val);
395 void ahd_outsb(struct ahd_softc * ahd, long port,
396 uint8_t *, int count);
397 void ahd_insb(struct ahd_softc * ahd, long port,
398 uint8_t *, int count);
399
400 uint8_t
401 ahd_inb(struct ahd_softc * ahd, long port)
402 {
403 uint8_t x;
404
405 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
406 x = readb(ahd->bshs[0].maddr + port);
407 } else {
408 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
409 }
410 mb();
411 return (x);
412 }
413
414 #if 0 /* unused */
415 static uint16_t
416 ahd_inw_atomic(struct ahd_softc * ahd, long port)
417 {
418 uint8_t x;
419
420 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
421 x = readw(ahd->bshs[0].maddr + port);
422 } else {
423 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
424 }
425 mb();
426 return (x);
427 }
428 #endif
429
430 void
431 ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)
432 {
433 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
434 writeb(val, ahd->bshs[0].maddr + port);
435 } else {
436 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
437 }
438 mb();
439 }
440
441 void
442 ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)
443 {
444 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
445 writew(val, ahd->bshs[0].maddr + port);
446 } else {
447 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
448 }
449 mb();
450 }
451
452 void
453 ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
454 {
455 int i;
456
457 /*
458 * There is probably a more efficient way to do this on Linux
459 * but we don't use this for anything speed critical and this
460 * should work.
461 */
462 for (i = 0; i < count; i++)
463 ahd_outb(ahd, port, *array++);
464 }
465
466 void
467 ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
468 {
469 int i;
470
471 /*
472 * There is probably a more efficient way to do this on Linux
473 * but we don't use this for anything speed critical and this
474 * should work.
475 */
476 for (i = 0; i < count; i++)
477 *array++ = ahd_inb(ahd, port);
478 }
479
480 /******************************* PCI Routines *********************************/
481 uint32_t
482 ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)
483 {
484 switch (width) {
485 case 1:
486 {
487 uint8_t retval;
488
489 pci_read_config_byte(pci, reg, &retval);
490 return (retval);
491 }
492 case 2:
493 {
494 uint16_t retval;
495 pci_read_config_word(pci, reg, &retval);
496 return (retval);
497 }
498 case 4:
499 {
500 uint32_t retval;
501 pci_read_config_dword(pci, reg, &retval);
502 return (retval);
503 }
504 default:
505 panic("ahd_pci_read_config: Read size too big");
506 /* NOTREACHED */
507 return (0);
508 }
509 }
510
511 void
512 ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)
513 {
514 switch (width) {
515 case 1:
516 pci_write_config_byte(pci, reg, value);
517 break;
518 case 2:
519 pci_write_config_word(pci, reg, value);
520 break;
521 case 4:
522 pci_write_config_dword(pci, reg, value);
523 break;
524 default:
525 panic("ahd_pci_write_config: Write size too big");
526 /* NOTREACHED */
527 }
528 }
529
530 /****************************** Inlines ***************************************/
531 static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
532
533 static void
534 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
535 {
536 struct scsi_cmnd *cmd;
537
538 cmd = scb->io_ctx;
539 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
540 scsi_dma_unmap(cmd);
541 }
542
543 /******************************** Macros **************************************/
544 #define BUILD_SCSIID(ahd, cmd) \
545 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
546
547 /*
548 * Return a string describing the driver.
549 */
550 static const char *
551 ahd_linux_info(struct Scsi_Host *host)
552 {
553 static char buffer[512];
554 char ahd_info[256];
555 char *bp;
556 struct ahd_softc *ahd;
557
558 bp = &buffer[0];
559 ahd = *(struct ahd_softc **)host->hostdata;
560 memset(bp, 0, sizeof(buffer));
561 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n"
562 " <");
563 strcat(bp, ahd->description);
564 strcat(bp, ">\n"
565 " ");
566 ahd_controller_info(ahd, ahd_info);
567 strcat(bp, ahd_info);
568
569 return (bp);
570 }
571
572 /*
573 * Queue an SCB to the controller.
574 */
575 static int
576 ahd_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
577 {
578 struct ahd_softc *ahd;
579 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
580 int rtn = SCSI_MLQUEUE_HOST_BUSY;
581
582 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
583
584 cmd->scsi_done = scsi_done;
585 cmd->result = CAM_REQ_INPROG << 16;
586 rtn = ahd_linux_run_command(ahd, dev, cmd);
587
588 return rtn;
589 }
590
591 static DEF_SCSI_QCMD(ahd_linux_queue)
592
593 static struct scsi_target **
594 ahd_linux_target_in_softc(struct scsi_target *starget)
595 {
596 struct ahd_softc *ahd =
597 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
598 unsigned int target_offset;
599
600 target_offset = starget->id;
601 if (starget->channel != 0)
602 target_offset += 8;
603
604 return &ahd->platform_data->starget[target_offset];
605 }
606
607 static int
608 ahd_linux_target_alloc(struct scsi_target *starget)
609 {
610 struct ahd_softc *ahd =
611 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
612 struct seeprom_config *sc = ahd->seep_config;
613 unsigned long flags;
614 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
615 struct ahd_devinfo devinfo;
616 struct ahd_initiator_tinfo *tinfo;
617 struct ahd_tmode_tstate *tstate;
618 char channel = starget->channel + 'A';
619
620 ahd_lock(ahd, &flags);
621
622 BUG_ON(*ahd_targp != NULL);
623
624 *ahd_targp = starget;
625
626 if (sc) {
627 int flags = sc->device_flags[starget->id];
628
629 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
630 starget->id, &tstate);
631
632 if ((flags & CFPACKETIZED) == 0) {
633 /* don't negotiate packetized (IU) transfers */
634 spi_max_iu(starget) = 0;
635 } else {
636 if ((ahd->features & AHD_RTI) == 0)
637 spi_rti(starget) = 0;
638 }
639
640 if ((flags & CFQAS) == 0)
641 spi_max_qas(starget) = 0;
642
643 /* Transinfo values have been set to BIOS settings */
644 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
645 spi_min_period(starget) = tinfo->user.period;
646 spi_max_offset(starget) = tinfo->user.offset;
647 }
648
649 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
650 starget->id, &tstate);
651 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
652 CAM_LUN_WILDCARD, channel,
653 ROLE_INITIATOR);
654 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
655 AHD_TRANS_GOAL, /*paused*/FALSE);
656 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
657 AHD_TRANS_GOAL, /*paused*/FALSE);
658 ahd_unlock(ahd, &flags);
659
660 return 0;
661 }
662
663 static void
664 ahd_linux_target_destroy(struct scsi_target *starget)
665 {
666 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
667
668 *ahd_targp = NULL;
669 }
670
671 static int
672 ahd_linux_slave_alloc(struct scsi_device *sdev)
673 {
674 struct ahd_softc *ahd =
675 *((struct ahd_softc **)sdev->host->hostdata);
676 struct ahd_linux_device *dev;
677
678 if (bootverbose)
679 printk("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
680
681 dev = scsi_transport_device_data(sdev);
682 memset(dev, 0, sizeof(*dev));
683
684 /*
685 * We start out life using untagged
686 * transactions of which we allow one.
687 */
688 dev->openings = 1;
689
690 /*
691 * Set maxtags to 0. This will be changed if we
692 * later determine that we are dealing with
693 * a tagged queuing capable device.
694 */
695 dev->maxtags = 0;
696
697 return (0);
698 }
699
700 static int
701 ahd_linux_slave_configure(struct scsi_device *sdev)
702 {
703 struct ahd_softc *ahd;
704
705 ahd = *((struct ahd_softc **)sdev->host->hostdata);
706 if (bootverbose)
707 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
708
709 ahd_linux_device_queue_depth(sdev);
710
711 /* Initial Domain Validation */
712 if (!spi_initial_dv(sdev->sdev_target))
713 spi_dv_device(sdev);
714
715 return 0;
716 }
717
718 #if defined(__i386__)
719 /*
720 * Return the disk geometry for the given SCSI device.
721 */
722 static int
723 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
724 sector_t capacity, int geom[])
725 {
726 uint8_t *bh;
727 int heads;
728 int sectors;
729 int cylinders;
730 int ret;
731 int extended;
732 struct ahd_softc *ahd;
733
734 ahd = *((struct ahd_softc **)sdev->host->hostdata);
735
736 bh = scsi_bios_ptable(bdev);
737 if (bh) {
738 ret = scsi_partsize(bh, capacity,
739 &geom[2], &geom[0], &geom[1]);
740 kfree(bh);
741 if (ret != -1)
742 return (ret);
743 }
744 heads = 64;
745 sectors = 32;
746 cylinders = aic_sector_div(capacity, heads, sectors);
747
748 if (aic79xx_extended != 0)
749 extended = 1;
750 else
751 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
752 if (extended && cylinders >= 1024) {
753 heads = 255;
754 sectors = 63;
755 cylinders = aic_sector_div(capacity, heads, sectors);
756 }
757 geom[0] = heads;
758 geom[1] = sectors;
759 geom[2] = cylinders;
760 return (0);
761 }
762 #endif
763
764 /*
765 * Abort the current SCSI command(s).
766 */
767 static int
768 ahd_linux_abort(struct scsi_cmnd *cmd)
769 {
770 int error;
771
772 error = ahd_linux_queue_abort_cmd(cmd);
773
774 return error;
775 }
776
777 /*
778 * Attempt to send a target reset message to the device that timed out.
779 */
780 static int
781 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
782 {
783 struct ahd_softc *ahd;
784 struct ahd_linux_device *dev;
785 struct scb *reset_scb;
786 u_int cdb_byte;
787 int retval = SUCCESS;
788 int paused;
789 int wait;
790 struct ahd_initiator_tinfo *tinfo;
791 struct ahd_tmode_tstate *tstate;
792 unsigned long flags;
793 DECLARE_COMPLETION_ONSTACK(done);
794
795 reset_scb = NULL;
796 paused = FALSE;
797 wait = FALSE;
798 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
799
800 scmd_printk(KERN_INFO, cmd,
801 "Attempting to queue a TARGET RESET message:");
802
803 printk("CDB:");
804 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
805 printk(" 0x%x", cmd->cmnd[cdb_byte]);
806 printk("\n");
807
808 /*
809 * Determine if we currently own this command.
810 */
811 dev = scsi_transport_device_data(cmd->device);
812
813 if (dev == NULL) {
814 /*
815 * No target device for this command exists,
816 * so we must not still own the command.
817 */
818 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
819 return SUCCESS;
820 }
821
822 /*
823 * Generate us a new SCB
824 */
825 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
826 if (!reset_scb) {
827 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
828 return FAILED;
829 }
830
831 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
832 cmd->device->id, &tstate);
833 reset_scb->io_ctx = cmd;
834 reset_scb->platform_data->dev = dev;
835 reset_scb->sg_count = 0;
836 ahd_set_residual(reset_scb, 0);
837 ahd_set_sense_residual(reset_scb, 0);
838 reset_scb->platform_data->xfer_len = 0;
839 reset_scb->hscb->control = 0;
840 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
841 reset_scb->hscb->lun = cmd->device->lun;
842 reset_scb->hscb->cdb_len = 0;
843 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
844 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
845 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
846 reset_scb->flags |= SCB_PACKETIZED;
847 } else {
848 reset_scb->hscb->control |= MK_MESSAGE;
849 }
850 dev->openings--;
851 dev->active++;
852 dev->commands_issued++;
853
854 ahd_lock(ahd, &flags);
855
856 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
857 ahd_queue_scb(ahd, reset_scb);
858
859 ahd->platform_data->eh_done = &done;
860 ahd_unlock(ahd, &flags);
861
862 printk("%s: Device reset code sleeping\n", ahd_name(ahd));
863 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
864 ahd_lock(ahd, &flags);
865 ahd->platform_data->eh_done = NULL;
866 ahd_unlock(ahd, &flags);
867 printk("%s: Device reset timer expired (active %d)\n",
868 ahd_name(ahd), dev->active);
869 retval = FAILED;
870 }
871 printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
872
873 return (retval);
874 }
875
876 /*
877 * Reset the SCSI bus.
878 */
879 static int
880 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
881 {
882 struct ahd_softc *ahd;
883 int found;
884 unsigned long flags;
885
886 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
887 #ifdef AHD_DEBUG
888 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
889 printk("%s: Bus reset called for cmd %p\n",
890 ahd_name(ahd), cmd);
891 #endif
892 ahd_lock(ahd, &flags);
893
894 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
895 /*initiate reset*/TRUE);
896 ahd_unlock(ahd, &flags);
897
898 if (bootverbose)
899 printk("%s: SCSI bus reset delivered. "
900 "%d SCBs aborted.\n", ahd_name(ahd), found);
901
902 return (SUCCESS);
903 }
904
905 struct scsi_host_template aic79xx_driver_template = {
906 .module = THIS_MODULE,
907 .name = "aic79xx",
908 .proc_name = "aic79xx",
909 .show_info = ahd_linux_show_info,
910 .write_info = ahd_proc_write_seeprom,
911 .info = ahd_linux_info,
912 .queuecommand = ahd_linux_queue,
913 .eh_abort_handler = ahd_linux_abort,
914 .eh_device_reset_handler = ahd_linux_dev_reset,
915 .eh_bus_reset_handler = ahd_linux_bus_reset,
916 #if defined(__i386__)
917 .bios_param = ahd_linux_biosparam,
918 #endif
919 .can_queue = AHD_MAX_QUEUE,
920 .this_id = -1,
921 .max_sectors = 8192,
922 .cmd_per_lun = 2,
923 .use_clustering = ENABLE_CLUSTERING,
924 .slave_alloc = ahd_linux_slave_alloc,
925 .slave_configure = ahd_linux_slave_configure,
926 .target_alloc = ahd_linux_target_alloc,
927 .target_destroy = ahd_linux_target_destroy,
928 .use_blk_tags = 1,
929 };
930
931 /******************************** Bus DMA *************************************/
932 int
933 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
934 bus_size_t alignment, bus_size_t boundary,
935 dma_addr_t lowaddr, dma_addr_t highaddr,
936 bus_dma_filter_t *filter, void *filterarg,
937 bus_size_t maxsize, int nsegments,
938 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
939 {
940 bus_dma_tag_t dmat;
941
942 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
943 if (dmat == NULL)
944 return (ENOMEM);
945
946 /*
947 * Linux is very simplistic about DMA memory. For now don't
948 * maintain all specification information. Once Linux supplies
949 * better facilities for doing these operations, or the
950 * needs of this particular driver change, we might need to do
951 * more here.
952 */
953 dmat->alignment = alignment;
954 dmat->boundary = boundary;
955 dmat->maxsize = maxsize;
956 *ret_tag = dmat;
957 return (0);
958 }
959
960 void
961 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
962 {
963 kfree(dmat);
964 }
965
966 int
967 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
968 int flags, bus_dmamap_t *mapp)
969 {
970 *vaddr = pci_alloc_consistent(ahd->dev_softc,
971 dmat->maxsize, mapp);
972 if (*vaddr == NULL)
973 return (ENOMEM);
974 return(0);
975 }
976
977 void
978 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
979 void* vaddr, bus_dmamap_t map)
980 {
981 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
982 vaddr, map);
983 }
984
985 int
986 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
987 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
988 void *cb_arg, int flags)
989 {
990 /*
991 * Assume for now that this will only be used during
992 * initialization and not for per-transaction buffer mapping.
993 */
994 bus_dma_segment_t stack_sg;
995
996 stack_sg.ds_addr = map;
997 stack_sg.ds_len = dmat->maxsize;
998 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
999 return (0);
1000 }
1001
1002 void
1003 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1004 {
1005 }
1006
1007 int
1008 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1009 {
1010 /* Nothing to do */
1011 return (0);
1012 }
1013
1014 /********************* Platform Dependent Functions ***************************/
1015 static void
1016 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
1017 {
1018
1019 if ((instance >= 0)
1020 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
1021 uint8_t *iocell_info;
1022
1023 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1024 iocell_info[index] = value & 0xFFFF;
1025 if (bootverbose)
1026 printk("iocell[%d:%ld] = %d\n", instance, index, value);
1027 }
1028 }
1029
1030 static void
1031 ahd_linux_setup_tag_info_global(char *p)
1032 {
1033 int tags, i, j;
1034
1035 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1036 printk("Setting Global Tags= %d\n", tags);
1037
1038 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
1039 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1040 aic79xx_tag_info[i].tag_commands[j] = tags;
1041 }
1042 }
1043 }
1044
1045 static void
1046 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1047 {
1048
1049 if ((instance >= 0) && (targ >= 0)
1050 && (instance < ARRAY_SIZE(aic79xx_tag_info))
1051 && (targ < AHD_NUM_TARGETS)) {
1052 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1053 if (bootverbose)
1054 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
1055 }
1056 }
1057
1058 static char *
1059 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
1060 void (*callback)(u_long, int, int, int32_t),
1061 u_long callback_arg)
1062 {
1063 char *tok_end;
1064 char *tok_end2;
1065 int i;
1066 int instance;
1067 int targ;
1068 int done;
1069 char tok_list[] = {'.', ',', '{', '}', '\0'};
1070
1071 /* All options use a ':' name/arg separator */
1072 if (*opt_arg != ':')
1073 return (opt_arg);
1074 opt_arg++;
1075 instance = -1;
1076 targ = -1;
1077 done = FALSE;
1078 /*
1079 * Restore separator that may be in
1080 * the middle of our option argument.
1081 */
1082 tok_end = strchr(opt_arg, '\0');
1083 if (tok_end < end)
1084 *tok_end = ',';
1085 while (!done) {
1086 switch (*opt_arg) {
1087 case '{':
1088 if (instance == -1) {
1089 instance = 0;
1090 } else {
1091 if (depth > 1) {
1092 if (targ == -1)
1093 targ = 0;
1094 } else {
1095 printk("Malformed Option %s\n",
1096 opt_name);
1097 done = TRUE;
1098 }
1099 }
1100 opt_arg++;
1101 break;
1102 case '}':
1103 if (targ != -1)
1104 targ = -1;
1105 else if (instance != -1)
1106 instance = -1;
1107 opt_arg++;
1108 break;
1109 case ',':
1110 case '.':
1111 if (instance == -1)
1112 done = TRUE;
1113 else if (targ >= 0)
1114 targ++;
1115 else if (instance >= 0)
1116 instance++;
1117 opt_arg++;
1118 break;
1119 case '\0':
1120 done = TRUE;
1121 break;
1122 default:
1123 tok_end = end;
1124 for (i = 0; tok_list[i]; i++) {
1125 tok_end2 = strchr(opt_arg, tok_list[i]);
1126 if ((tok_end2) && (tok_end2 < tok_end))
1127 tok_end = tok_end2;
1128 }
1129 callback(callback_arg, instance, targ,
1130 simple_strtol(opt_arg, NULL, 0));
1131 opt_arg = tok_end;
1132 break;
1133 }
1134 }
1135 return (opt_arg);
1136 }
1137
1138 /*
1139 * Handle Linux boot parameters. This routine allows for assigning a value
1140 * to a parameter with a ':' between the parameter and the value.
1141 * ie. aic79xx=stpwlev:1,extended
1142 */
1143 static int
1144 aic79xx_setup(char *s)
1145 {
1146 int i, n;
1147 char *p;
1148 char *end;
1149
1150 static const struct {
1151 const char *name;
1152 uint32_t *flag;
1153 } options[] = {
1154 { "extended", &aic79xx_extended },
1155 { "no_reset", &aic79xx_no_reset },
1156 { "verbose", &aic79xx_verbose },
1157 { "allow_memio", &aic79xx_allow_memio},
1158 #ifdef AHD_DEBUG
1159 { "debug", &ahd_debug },
1160 #endif
1161 { "periodic_otag", &aic79xx_periodic_otag },
1162 { "pci_parity", &aic79xx_pci_parity },
1163 { "seltime", &aic79xx_seltime },
1164 { "tag_info", NULL },
1165 { "global_tag_depth", NULL},
1166 { "slewrate", NULL },
1167 { "precomp", NULL },
1168 { "amplitude", NULL },
1169 { "slowcrc", &aic79xx_slowcrc },
1170 };
1171
1172 end = strchr(s, '\0');
1173
1174 /*
1175 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1176 * will never be 0 in this case.
1177 */
1178 n = 0;
1179
1180 while ((p = strsep(&s, ",.")) != NULL) {
1181 if (*p == '\0')
1182 continue;
1183 for (i = 0; i < ARRAY_SIZE(options); i++) {
1184
1185 n = strlen(options[i].name);
1186 if (strncmp(options[i].name, p, n) == 0)
1187 break;
1188 }
1189 if (i == ARRAY_SIZE(options))
1190 continue;
1191
1192 if (strncmp(p, "global_tag_depth", n) == 0) {
1193 ahd_linux_setup_tag_info_global(p + n);
1194 } else if (strncmp(p, "tag_info", n) == 0) {
1195 s = ahd_parse_brace_option("tag_info", p + n, end,
1196 2, ahd_linux_setup_tag_info, 0);
1197 } else if (strncmp(p, "slewrate", n) == 0) {
1198 s = ahd_parse_brace_option("slewrate",
1199 p + n, end, 1, ahd_linux_setup_iocell_info,
1200 AIC79XX_SLEWRATE_INDEX);
1201 } else if (strncmp(p, "precomp", n) == 0) {
1202 s = ahd_parse_brace_option("precomp",
1203 p + n, end, 1, ahd_linux_setup_iocell_info,
1204 AIC79XX_PRECOMP_INDEX);
1205 } else if (strncmp(p, "amplitude", n) == 0) {
1206 s = ahd_parse_brace_option("amplitude",
1207 p + n, end, 1, ahd_linux_setup_iocell_info,
1208 AIC79XX_AMPLITUDE_INDEX);
1209 } else if (p[n] == ':') {
1210 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1211 } else if (!strncmp(p, "verbose", n)) {
1212 *(options[i].flag) = 1;
1213 } else {
1214 *(options[i].flag) ^= 0xFFFFFFFF;
1215 }
1216 }
1217 return 1;
1218 }
1219
1220 __setup("aic79xx=", aic79xx_setup);
1221
1222 uint32_t aic79xx_verbose;
1223
1224 int
1225 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1226 {
1227 char buf[80];
1228 struct Scsi_Host *host;
1229 char *new_name;
1230 u_long s;
1231 int retval;
1232
1233 template->name = ahd->description;
1234 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1235 if (host == NULL)
1236 return (ENOMEM);
1237
1238 *((struct ahd_softc **)host->hostdata) = ahd;
1239 ahd->platform_data->host = host;
1240 host->can_queue = AHD_MAX_QUEUE;
1241 host->cmd_per_lun = 2;
1242 host->sg_tablesize = AHD_NSEG;
1243 host->this_id = ahd->our_id;
1244 host->irq = ahd->platform_data->irq;
1245 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1246 host->max_lun = AHD_NUM_LUNS;
1247 host->max_channel = 0;
1248 host->sg_tablesize = AHD_NSEG;
1249 ahd_lock(ahd, &s);
1250 ahd_set_unit(ahd, ahd_linux_unit++);
1251 ahd_unlock(ahd, &s);
1252 sprintf(buf, "scsi%d", host->host_no);
1253 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1254 if (new_name != NULL) {
1255 strcpy(new_name, buf);
1256 ahd_set_name(ahd, new_name);
1257 }
1258 host->unique_id = ahd->unit;
1259 ahd_linux_initialize_scsi_bus(ahd);
1260 ahd_intr_enable(ahd, TRUE);
1261
1262 host->transportt = ahd_linux_transport_template;
1263
1264 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1265 if (retval) {
1266 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1267 scsi_host_put(host);
1268 return retval;
1269 }
1270
1271 scsi_scan_host(host);
1272 return 0;
1273 }
1274
1275 /*
1276 * Place the SCSI bus into a known state by either resetting it,
1277 * or forcing transfer negotiations on the next command to any
1278 * target.
1279 */
1280 static void
1281 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1282 {
1283 u_int target_id;
1284 u_int numtarg;
1285 unsigned long s;
1286
1287 target_id = 0;
1288 numtarg = 0;
1289
1290 if (aic79xx_no_reset != 0)
1291 ahd->flags &= ~AHD_RESET_BUS_A;
1292
1293 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1294 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1295 else
1296 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1297
1298 ahd_lock(ahd, &s);
1299
1300 /*
1301 * Force negotiation to async for all targets that
1302 * will not see an initial bus reset.
1303 */
1304 for (; target_id < numtarg; target_id++) {
1305 struct ahd_devinfo devinfo;
1306 struct ahd_initiator_tinfo *tinfo;
1307 struct ahd_tmode_tstate *tstate;
1308
1309 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1310 target_id, &tstate);
1311 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1312 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1313 ahd_update_neg_request(ahd, &devinfo, tstate,
1314 tinfo, AHD_NEG_ALWAYS);
1315 }
1316 ahd_unlock(ahd, &s);
1317 /* Give the bus some time to recover */
1318 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1319 ahd_freeze_simq(ahd);
1320 msleep(AIC79XX_RESET_DELAY);
1321 ahd_release_simq(ahd);
1322 }
1323 }
1324
1325 int
1326 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1327 {
1328 ahd->platform_data =
1329 kmalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC);
1330 if (ahd->platform_data == NULL)
1331 return (ENOMEM);
1332 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1333 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1334 ahd_lockinit(ahd);
1335 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1336 return (0);
1337 }
1338
1339 void
1340 ahd_platform_free(struct ahd_softc *ahd)
1341 {
1342 struct scsi_target *starget;
1343 int i;
1344
1345 if (ahd->platform_data != NULL) {
1346 /* destroy all of the device and target objects */
1347 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1348 starget = ahd->platform_data->starget[i];
1349 if (starget != NULL) {
1350 ahd->platform_data->starget[i] = NULL;
1351 }
1352 }
1353
1354 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1355 free_irq(ahd->platform_data->irq, ahd);
1356 if (ahd->tags[0] == BUS_SPACE_PIO
1357 && ahd->bshs[0].ioport != 0)
1358 release_region(ahd->bshs[0].ioport, 256);
1359 if (ahd->tags[1] == BUS_SPACE_PIO
1360 && ahd->bshs[1].ioport != 0)
1361 release_region(ahd->bshs[1].ioport, 256);
1362 if (ahd->tags[0] == BUS_SPACE_MEMIO
1363 && ahd->bshs[0].maddr != NULL) {
1364 iounmap(ahd->bshs[0].maddr);
1365 release_mem_region(ahd->platform_data->mem_busaddr,
1366 0x1000);
1367 }
1368 if (ahd->platform_data->host)
1369 scsi_host_put(ahd->platform_data->host);
1370
1371 kfree(ahd->platform_data);
1372 }
1373 }
1374
1375 void
1376 ahd_platform_init(struct ahd_softc *ahd)
1377 {
1378 /*
1379 * Lookup and commit any modified IO Cell options.
1380 */
1381 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1382 const struct ahd_linux_iocell_opts *iocell_opts;
1383
1384 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1385 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1386 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1387 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1388 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1389 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1390 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1391 }
1392
1393 }
1394
1395 void
1396 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1397 {
1398 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1399 SCB_GET_CHANNEL(ahd, scb),
1400 SCB_GET_LUN(scb), SCB_LIST_NULL,
1401 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1402 }
1403
1404 void
1405 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1406 struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1407 {
1408 struct ahd_linux_device *dev;
1409 int was_queuing;
1410 int now_queuing;
1411
1412 if (sdev == NULL)
1413 return;
1414
1415 dev = scsi_transport_device_data(sdev);
1416
1417 if (dev == NULL)
1418 return;
1419 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1420 switch (alg) {
1421 default:
1422 case AHD_QUEUE_NONE:
1423 now_queuing = 0;
1424 break;
1425 case AHD_QUEUE_BASIC:
1426 now_queuing = AHD_DEV_Q_BASIC;
1427 break;
1428 case AHD_QUEUE_TAGGED:
1429 now_queuing = AHD_DEV_Q_TAGGED;
1430 break;
1431 }
1432 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1433 && (was_queuing != now_queuing)
1434 && (dev->active != 0)) {
1435 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1436 dev->qfrozen++;
1437 }
1438
1439 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1440 if (now_queuing) {
1441 u_int usertags;
1442
1443 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1444 if (!was_queuing) {
1445 /*
1446 * Start out aggressively and allow our
1447 * dynamic queue depth algorithm to take
1448 * care of the rest.
1449 */
1450 dev->maxtags = usertags;
1451 dev->openings = dev->maxtags - dev->active;
1452 }
1453 if (dev->maxtags == 0) {
1454 /*
1455 * Queueing is disabled by the user.
1456 */
1457 dev->openings = 1;
1458 } else if (alg == AHD_QUEUE_TAGGED) {
1459 dev->flags |= AHD_DEV_Q_TAGGED;
1460 if (aic79xx_periodic_otag != 0)
1461 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1462 } else
1463 dev->flags |= AHD_DEV_Q_BASIC;
1464 } else {
1465 /* We can only have one opening. */
1466 dev->maxtags = 0;
1467 dev->openings = 1 - dev->active;
1468 }
1469
1470 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1471 case AHD_DEV_Q_BASIC:
1472 case AHD_DEV_Q_TAGGED:
1473 scsi_change_queue_depth(sdev,
1474 dev->openings + dev->active);
1475 break;
1476 default:
1477 /*
1478 * We allow the OS to queue 2 untagged transactions to
1479 * us at any time even though we can only execute them
1480 * serially on the controller/device. This should
1481 * remove some latency.
1482 */
1483 scsi_change_queue_depth(sdev, 1);
1484 break;
1485 }
1486 }
1487
1488 int
1489 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1490 int lun, u_int tag, role_t role, uint32_t status)
1491 {
1492 return 0;
1493 }
1494
1495 static u_int
1496 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1497 {
1498 static int warned_user;
1499 u_int tags;
1500
1501 tags = 0;
1502 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1503 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1504
1505 if (warned_user == 0) {
1506 printk(KERN_WARNING
1507 "aic79xx: WARNING: Insufficient tag_info instances\n"
1508 "aic79xx: for installed controllers. Using defaults\n"
1509 "aic79xx: Please update the aic79xx_tag_info array in\n"
1510 "aic79xx: the aic79xx_osm.c source file.\n");
1511 warned_user++;
1512 }
1513 tags = AHD_MAX_QUEUE;
1514 } else {
1515 adapter_tag_info_t *tag_info;
1516
1517 tag_info = &aic79xx_tag_info[ahd->unit];
1518 tags = tag_info->tag_commands[devinfo->target_offset];
1519 if (tags > AHD_MAX_QUEUE)
1520 tags = AHD_MAX_QUEUE;
1521 }
1522 }
1523 return (tags);
1524 }
1525
1526 /*
1527 * Determines the queue depth for a given device.
1528 */
1529 static void
1530 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1531 {
1532 struct ahd_devinfo devinfo;
1533 u_int tags;
1534 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1535
1536 ahd_compile_devinfo(&devinfo,
1537 ahd->our_id,
1538 sdev->sdev_target->id, sdev->lun,
1539 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1540 ROLE_INITIATOR);
1541 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1542 if (tags != 0 && sdev->tagged_supported != 0) {
1543
1544 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1545 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1546 devinfo.lun, AC_TRANSFER_NEG);
1547 ahd_print_devinfo(ahd, &devinfo);
1548 printk("Tagged Queuing enabled. Depth %d\n", tags);
1549 } else {
1550 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1551 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1552 devinfo.lun, AC_TRANSFER_NEG);
1553 }
1554 }
1555
1556 static int
1557 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1558 struct scsi_cmnd *cmd)
1559 {
1560 struct scb *scb;
1561 struct hardware_scb *hscb;
1562 struct ahd_initiator_tinfo *tinfo;
1563 struct ahd_tmode_tstate *tstate;
1564 u_int col_idx;
1565 uint16_t mask;
1566 unsigned long flags;
1567 int nseg;
1568
1569 nseg = scsi_dma_map(cmd);
1570 if (nseg < 0)
1571 return SCSI_MLQUEUE_HOST_BUSY;
1572
1573 ahd_lock(ahd, &flags);
1574
1575 /*
1576 * Get an scb to use.
1577 */
1578 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1579 cmd->device->id, &tstate);
1580 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1581 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1582 col_idx = AHD_NEVER_COL_IDX;
1583 } else {
1584 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1585 cmd->device->lun);
1586 }
1587 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1588 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1589 ahd_unlock(ahd, &flags);
1590 scsi_dma_unmap(cmd);
1591 return SCSI_MLQUEUE_HOST_BUSY;
1592 }
1593
1594 scb->io_ctx = cmd;
1595 scb->platform_data->dev = dev;
1596 hscb = scb->hscb;
1597 cmd->host_scribble = (char *)scb;
1598
1599 /*
1600 * Fill out basics of the HSCB.
1601 */
1602 hscb->control = 0;
1603 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1604 hscb->lun = cmd->device->lun;
1605 scb->hscb->task_management = 0;
1606 mask = SCB_GET_TARGET_MASK(ahd, scb);
1607
1608 if ((ahd->user_discenable & mask) != 0)
1609 hscb->control |= DISCENB;
1610
1611 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1612 scb->flags |= SCB_PACKETIZED;
1613
1614 if ((tstate->auto_negotiate & mask) != 0) {
1615 scb->flags |= SCB_AUTO_NEGOTIATE;
1616 scb->hscb->control |= MK_MESSAGE;
1617 }
1618
1619 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1620 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1621 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1622 hscb->control |= MSG_ORDERED_TASK;
1623 dev->commands_since_idle_or_otag = 0;
1624 } else {
1625 hscb->control |= MSG_SIMPLE_TASK;
1626 }
1627 }
1628
1629 hscb->cdb_len = cmd->cmd_len;
1630 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1631
1632 scb->platform_data->xfer_len = 0;
1633 ahd_set_residual(scb, 0);
1634 ahd_set_sense_residual(scb, 0);
1635 scb->sg_count = 0;
1636
1637 if (nseg > 0) {
1638 void *sg = scb->sg_list;
1639 struct scatterlist *cur_seg;
1640 int i;
1641
1642 scb->platform_data->xfer_len = 0;
1643
1644 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1645 dma_addr_t addr;
1646 bus_size_t len;
1647
1648 addr = sg_dma_address(cur_seg);
1649 len = sg_dma_len(cur_seg);
1650 scb->platform_data->xfer_len += len;
1651 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1652 i == (nseg - 1));
1653 }
1654 }
1655
1656 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1657 dev->openings--;
1658 dev->active++;
1659 dev->commands_issued++;
1660
1661 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1662 dev->commands_since_idle_or_otag++;
1663 scb->flags |= SCB_ACTIVE;
1664 ahd_queue_scb(ahd, scb);
1665
1666 ahd_unlock(ahd, &flags);
1667
1668 return 0;
1669 }
1670
1671 /*
1672 * SCSI controller interrupt handler.
1673 */
1674 irqreturn_t
1675 ahd_linux_isr(int irq, void *dev_id)
1676 {
1677 struct ahd_softc *ahd;
1678 u_long flags;
1679 int ours;
1680
1681 ahd = (struct ahd_softc *) dev_id;
1682 ahd_lock(ahd, &flags);
1683 ours = ahd_intr(ahd);
1684 ahd_unlock(ahd, &flags);
1685 return IRQ_RETVAL(ours);
1686 }
1687
1688 void
1689 ahd_send_async(struct ahd_softc *ahd, char channel,
1690 u_int target, u_int lun, ac_code code)
1691 {
1692 switch (code) {
1693 case AC_TRANSFER_NEG:
1694 {
1695 struct scsi_target *starget;
1696 struct ahd_initiator_tinfo *tinfo;
1697 struct ahd_tmode_tstate *tstate;
1698 unsigned int target_ppr_options;
1699
1700 BUG_ON(target == CAM_TARGET_WILDCARD);
1701
1702 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1703 target, &tstate);
1704
1705 /*
1706 * Don't bother reporting results while
1707 * negotiations are still pending.
1708 */
1709 if (tinfo->curr.period != tinfo->goal.period
1710 || tinfo->curr.width != tinfo->goal.width
1711 || tinfo->curr.offset != tinfo->goal.offset
1712 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1713 if (bootverbose == 0)
1714 break;
1715
1716 /*
1717 * Don't bother reporting results that
1718 * are identical to those last reported.
1719 */
1720 starget = ahd->platform_data->starget[target];
1721 if (starget == NULL)
1722 break;
1723
1724 target_ppr_options =
1725 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1726 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1727 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1728 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1729 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1730 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1731 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1732 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1733
1734 if (tinfo->curr.period == spi_period(starget)
1735 && tinfo->curr.width == spi_width(starget)
1736 && tinfo->curr.offset == spi_offset(starget)
1737 && tinfo->curr.ppr_options == target_ppr_options)
1738 if (bootverbose == 0)
1739 break;
1740
1741 spi_period(starget) = tinfo->curr.period;
1742 spi_width(starget) = tinfo->curr.width;
1743 spi_offset(starget) = tinfo->curr.offset;
1744 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1745 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1746 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1747 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1748 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1749 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1750 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1751 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1752 spi_display_xfer_agreement(starget);
1753 break;
1754 }
1755 case AC_SENT_BDR:
1756 {
1757 WARN_ON(lun != CAM_LUN_WILDCARD);
1758 scsi_report_device_reset(ahd->platform_data->host,
1759 channel - 'A', target);
1760 break;
1761 }
1762 case AC_BUS_RESET:
1763 if (ahd->platform_data->host != NULL) {
1764 scsi_report_bus_reset(ahd->platform_data->host,
1765 channel - 'A');
1766 }
1767 break;
1768 default:
1769 panic("ahd_send_async: Unexpected async event");
1770 }
1771 }
1772
1773 /*
1774 * Calls the higher level scsi done function and frees the scb.
1775 */
1776 void
1777 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1778 {
1779 struct scsi_cmnd *cmd;
1780 struct ahd_linux_device *dev;
1781
1782 if ((scb->flags & SCB_ACTIVE) == 0) {
1783 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1784 ahd_dump_card_state(ahd);
1785 panic("Stopping for safety");
1786 }
1787 LIST_REMOVE(scb, pending_links);
1788 cmd = scb->io_ctx;
1789 dev = scb->platform_data->dev;
1790 dev->active--;
1791 dev->openings++;
1792 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1793 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1794 dev->qfrozen--;
1795 }
1796 ahd_linux_unmap_scb(ahd, scb);
1797
1798 /*
1799 * Guard against stale sense data.
1800 * The Linux mid-layer assumes that sense
1801 * was retrieved anytime the first byte of
1802 * the sense buffer looks "sane".
1803 */
1804 cmd->sense_buffer[0] = 0;
1805 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1806 uint32_t amount_xferred;
1807
1808 amount_xferred =
1809 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1810 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1811 #ifdef AHD_DEBUG
1812 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1813 ahd_print_path(ahd, scb);
1814 printk("Set CAM_UNCOR_PARITY\n");
1815 }
1816 #endif
1817 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1818 #ifdef AHD_REPORT_UNDERFLOWS
1819 /*
1820 * This code is disabled by default as some
1821 * clients of the SCSI system do not properly
1822 * initialize the underflow parameter. This
1823 * results in spurious termination of commands
1824 * that complete as expected (e.g. underflow is
1825 * allowed as command can return variable amounts
1826 * of data.
1827 */
1828 } else if (amount_xferred < scb->io_ctx->underflow) {
1829 u_int i;
1830
1831 ahd_print_path(ahd, scb);
1832 printk("CDB:");
1833 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1834 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1835 printk("\n");
1836 ahd_print_path(ahd, scb);
1837 printk("Saw underflow (%ld of %ld bytes). "
1838 "Treated as error\n",
1839 ahd_get_residual(scb),
1840 ahd_get_transfer_length(scb));
1841 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1842 #endif
1843 } else {
1844 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1845 }
1846 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1847 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1848 }
1849
1850 if (dev->openings == 1
1851 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1852 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1853 dev->tag_success_count++;
1854 /*
1855 * Some devices deal with temporary internal resource
1856 * shortages by returning queue full. When the queue
1857 * full occurrs, we throttle back. Slowly try to get
1858 * back to our previous queue depth.
1859 */
1860 if ((dev->openings + dev->active) < dev->maxtags
1861 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1862 dev->tag_success_count = 0;
1863 dev->openings++;
1864 }
1865
1866 if (dev->active == 0)
1867 dev->commands_since_idle_or_otag = 0;
1868
1869 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1870 printk("Recovery SCB completes\n");
1871 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1872 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1873 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1874
1875 if (ahd->platform_data->eh_done)
1876 complete(ahd->platform_data->eh_done);
1877 }
1878
1879 ahd_free_scb(ahd, scb);
1880 ahd_linux_queue_cmd_complete(ahd, cmd);
1881 }
1882
1883 static void
1884 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1885 struct scsi_device *sdev, struct scb *scb)
1886 {
1887 struct ahd_devinfo devinfo;
1888 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1889
1890 ahd_compile_devinfo(&devinfo,
1891 ahd->our_id,
1892 sdev->sdev_target->id, sdev->lun,
1893 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1894 ROLE_INITIATOR);
1895
1896 /*
1897 * We don't currently trust the mid-layer to
1898 * properly deal with queue full or busy. So,
1899 * when one occurs, we tell the mid-layer to
1900 * unconditionally requeue the command to us
1901 * so that we can retry it ourselves. We also
1902 * implement our own throttling mechanism so
1903 * we don't clobber the device with too many
1904 * commands.
1905 */
1906 switch (ahd_get_scsi_status(scb)) {
1907 default:
1908 break;
1909 case SCSI_STATUS_CHECK_COND:
1910 case SCSI_STATUS_CMD_TERMINATED:
1911 {
1912 struct scsi_cmnd *cmd;
1913
1914 /*
1915 * Copy sense information to the OS's cmd
1916 * structure if it is available.
1917 */
1918 cmd = scb->io_ctx;
1919 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1920 struct scsi_status_iu_header *siu;
1921 u_int sense_size;
1922 u_int sense_offset;
1923
1924 if (scb->flags & SCB_SENSE) {
1925 sense_size = min(sizeof(struct scsi_sense_data)
1926 - ahd_get_sense_residual(scb),
1927 (u_long)SCSI_SENSE_BUFFERSIZE);
1928 sense_offset = 0;
1929 } else {
1930 /*
1931 * Copy only the sense data into the provided
1932 * buffer.
1933 */
1934 siu = (struct scsi_status_iu_header *)
1935 scb->sense_data;
1936 sense_size = min_t(size_t,
1937 scsi_4btoul(siu->sense_length),
1938 SCSI_SENSE_BUFFERSIZE);
1939 sense_offset = SIU_SENSE_OFFSET(siu);
1940 }
1941
1942 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1943 memcpy(cmd->sense_buffer,
1944 ahd_get_sense_buf(ahd, scb)
1945 + sense_offset, sense_size);
1946 cmd->result |= (DRIVER_SENSE << 24);
1947
1948 #ifdef AHD_DEBUG
1949 if (ahd_debug & AHD_SHOW_SENSE) {
1950 int i;
1951
1952 printk("Copied %d bytes of sense data at %d:",
1953 sense_size, sense_offset);
1954 for (i = 0; i < sense_size; i++) {
1955 if ((i & 0xF) == 0)
1956 printk("\n");
1957 printk("0x%x ", cmd->sense_buffer[i]);
1958 }
1959 printk("\n");
1960 }
1961 #endif
1962 }
1963 break;
1964 }
1965 case SCSI_STATUS_QUEUE_FULL:
1966 /*
1967 * By the time the core driver has returned this
1968 * command, all other commands that were queued
1969 * to us but not the device have been returned.
1970 * This ensures that dev->active is equal to
1971 * the number of commands actually queued to
1972 * the device.
1973 */
1974 dev->tag_success_count = 0;
1975 if (dev->active != 0) {
1976 /*
1977 * Drop our opening count to the number
1978 * of commands currently outstanding.
1979 */
1980 dev->openings = 0;
1981 #ifdef AHD_DEBUG
1982 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1983 ahd_print_path(ahd, scb);
1984 printk("Dropping tag count to %d\n",
1985 dev->active);
1986 }
1987 #endif
1988 if (dev->active == dev->tags_on_last_queuefull) {
1989
1990 dev->last_queuefull_same_count++;
1991 /*
1992 * If we repeatedly see a queue full
1993 * at the same queue depth, this
1994 * device has a fixed number of tag
1995 * slots. Lock in this tag depth
1996 * so we stop seeing queue fulls from
1997 * this device.
1998 */
1999 if (dev->last_queuefull_same_count
2000 == AHD_LOCK_TAGS_COUNT) {
2001 dev->maxtags = dev->active;
2002 ahd_print_path(ahd, scb);
2003 printk("Locking max tag count at %d\n",
2004 dev->active);
2005 }
2006 } else {
2007 dev->tags_on_last_queuefull = dev->active;
2008 dev->last_queuefull_same_count = 0;
2009 }
2010 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
2011 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
2012 ahd_platform_set_tags(ahd, sdev, &devinfo,
2013 (dev->flags & AHD_DEV_Q_BASIC)
2014 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2015 break;
2016 }
2017 /*
2018 * Drop down to a single opening, and treat this
2019 * as if the target returned BUSY SCSI status.
2020 */
2021 dev->openings = 1;
2022 ahd_platform_set_tags(ahd, sdev, &devinfo,
2023 (dev->flags & AHD_DEV_Q_BASIC)
2024 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2025 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
2026 }
2027 }
2028
2029 static void
2030 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
2031 {
2032 int status;
2033 int new_status = DID_OK;
2034 int do_fallback = 0;
2035 int scsi_status;
2036
2037 /*
2038 * Map CAM error codes into Linux Error codes. We
2039 * avoid the conversion so that the DV code has the
2040 * full error information available when making
2041 * state change decisions.
2042 */
2043
2044 status = ahd_cmd_get_transaction_status(cmd);
2045 switch (status) {
2046 case CAM_REQ_INPROG:
2047 case CAM_REQ_CMP:
2048 new_status = DID_OK;
2049 break;
2050 case CAM_AUTOSENSE_FAIL:
2051 new_status = DID_ERROR;
2052 /* Fallthrough */
2053 case CAM_SCSI_STATUS_ERROR:
2054 scsi_status = ahd_cmd_get_scsi_status(cmd);
2055
2056 switch(scsi_status) {
2057 case SCSI_STATUS_CMD_TERMINATED:
2058 case SCSI_STATUS_CHECK_COND:
2059 if ((cmd->result >> 24) != DRIVER_SENSE) {
2060 do_fallback = 1;
2061 } else {
2062 struct scsi_sense_data *sense;
2063
2064 sense = (struct scsi_sense_data *)
2065 cmd->sense_buffer;
2066 if (sense->extra_len >= 5 &&
2067 (sense->add_sense_code == 0x47
2068 || sense->add_sense_code == 0x48))
2069 do_fallback = 1;
2070 }
2071 break;
2072 default:
2073 break;
2074 }
2075 break;
2076 case CAM_REQ_ABORTED:
2077 new_status = DID_ABORT;
2078 break;
2079 case CAM_BUSY:
2080 new_status = DID_BUS_BUSY;
2081 break;
2082 case CAM_REQ_INVALID:
2083 case CAM_PATH_INVALID:
2084 new_status = DID_BAD_TARGET;
2085 break;
2086 case CAM_SEL_TIMEOUT:
2087 new_status = DID_NO_CONNECT;
2088 break;
2089 case CAM_SCSI_BUS_RESET:
2090 case CAM_BDR_SENT:
2091 new_status = DID_RESET;
2092 break;
2093 case CAM_UNCOR_PARITY:
2094 new_status = DID_PARITY;
2095 do_fallback = 1;
2096 break;
2097 case CAM_CMD_TIMEOUT:
2098 new_status = DID_TIME_OUT;
2099 do_fallback = 1;
2100 break;
2101 case CAM_REQ_CMP_ERR:
2102 case CAM_UNEXP_BUSFREE:
2103 case CAM_DATA_RUN_ERR:
2104 new_status = DID_ERROR;
2105 do_fallback = 1;
2106 break;
2107 case CAM_UA_ABORT:
2108 case CAM_NO_HBA:
2109 case CAM_SEQUENCE_FAIL:
2110 case CAM_CCB_LEN_ERR:
2111 case CAM_PROVIDE_FAIL:
2112 case CAM_REQ_TERMIO:
2113 case CAM_UNREC_HBA_ERROR:
2114 case CAM_REQ_TOO_BIG:
2115 new_status = DID_ERROR;
2116 break;
2117 case CAM_REQUEUE_REQ:
2118 new_status = DID_REQUEUE;
2119 break;
2120 default:
2121 /* We should never get here */
2122 new_status = DID_ERROR;
2123 break;
2124 }
2125
2126 if (do_fallback) {
2127 printk("%s: device overrun (status %x) on %d:%d:%d\n",
2128 ahd_name(ahd), status, cmd->device->channel,
2129 cmd->device->id, (u8)cmd->device->lun);
2130 }
2131
2132 ahd_cmd_set_transaction_status(cmd, new_status);
2133
2134 cmd->scsi_done(cmd);
2135 }
2136
2137 static void
2138 ahd_freeze_simq(struct ahd_softc *ahd)
2139 {
2140 scsi_block_requests(ahd->platform_data->host);
2141 }
2142
2143 static void
2144 ahd_release_simq(struct ahd_softc *ahd)
2145 {
2146 scsi_unblock_requests(ahd->platform_data->host);
2147 }
2148
2149 static int
2150 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2151 {
2152 struct ahd_softc *ahd;
2153 struct ahd_linux_device *dev;
2154 struct scb *pending_scb;
2155 u_int saved_scbptr;
2156 u_int active_scbptr;
2157 u_int last_phase;
2158 u_int saved_scsiid;
2159 u_int cdb_byte;
2160 int retval;
2161 int was_paused;
2162 int paused;
2163 int wait;
2164 int disconnected;
2165 ahd_mode_state saved_modes;
2166 unsigned long flags;
2167
2168 pending_scb = NULL;
2169 paused = FALSE;
2170 wait = FALSE;
2171 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2172
2173 scmd_printk(KERN_INFO, cmd,
2174 "Attempting to queue an ABORT message:");
2175
2176 printk("CDB:");
2177 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2178 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2179 printk("\n");
2180
2181 ahd_lock(ahd, &flags);
2182
2183 /*
2184 * First determine if we currently own this command.
2185 * Start by searching the device queue. If not found
2186 * there, check the pending_scb list. If not found
2187 * at all, and the system wanted us to just abort the
2188 * command, return success.
2189 */
2190 dev = scsi_transport_device_data(cmd->device);
2191
2192 if (dev == NULL) {
2193 /*
2194 * No target device for this command exists,
2195 * so we must not still own the command.
2196 */
2197 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2198 retval = SUCCESS;
2199 goto no_cmd;
2200 }
2201
2202 /*
2203 * See if we can find a matching cmd in the pending list.
2204 */
2205 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2206 if (pending_scb->io_ctx == cmd)
2207 break;
2208 }
2209
2210 if (pending_scb == NULL) {
2211 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2212 goto no_cmd;
2213 }
2214
2215 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2216 /*
2217 * We can't queue two recovery actions using the same SCB
2218 */
2219 retval = FAILED;
2220 goto done;
2221 }
2222
2223 /*
2224 * Ensure that the card doesn't do anything
2225 * behind our back. Also make sure that we
2226 * didn't "just" miss an interrupt that would
2227 * affect this cmd.
2228 */
2229 was_paused = ahd_is_paused(ahd);
2230 ahd_pause_and_flushwork(ahd);
2231 paused = TRUE;
2232
2233 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2234 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2235 goto no_cmd;
2236 }
2237
2238 printk("%s: At time of recovery, card was %spaused\n",
2239 ahd_name(ahd), was_paused ? "" : "not ");
2240 ahd_dump_card_state(ahd);
2241
2242 disconnected = TRUE;
2243 if (ahd_search_qinfifo(ahd, cmd->device->id,
2244 cmd->device->channel + 'A',
2245 cmd->device->lun,
2246 pending_scb->hscb->tag,
2247 ROLE_INITIATOR, CAM_REQ_ABORTED,
2248 SEARCH_COMPLETE) > 0) {
2249 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2250 ahd_name(ahd), cmd->device->channel,
2251 cmd->device->id, (u8)cmd->device->lun);
2252 retval = SUCCESS;
2253 goto done;
2254 }
2255
2256 saved_modes = ahd_save_modes(ahd);
2257 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2258 last_phase = ahd_inb(ahd, LASTPHASE);
2259 saved_scbptr = ahd_get_scbptr(ahd);
2260 active_scbptr = saved_scbptr;
2261 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2262 struct scb *bus_scb;
2263
2264 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2265 if (bus_scb == pending_scb)
2266 disconnected = FALSE;
2267 }
2268
2269 /*
2270 * At this point, pending_scb is the scb associated with the
2271 * passed in command. That command is currently active on the
2272 * bus or is in the disconnected state.
2273 */
2274 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2275 if (last_phase != P_BUSFREE
2276 && SCB_GET_TAG(pending_scb) == active_scbptr) {
2277
2278 /*
2279 * We're active on the bus, so assert ATN
2280 * and hope that the target responds.
2281 */
2282 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2283 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2284 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2285 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2286 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2287 wait = TRUE;
2288 } else if (disconnected) {
2289
2290 /*
2291 * Actually re-queue this SCB in an attempt
2292 * to select the device before it reconnects.
2293 */
2294 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2295 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2296 pending_scb->hscb->cdb_len = 0;
2297 pending_scb->hscb->task_attribute = 0;
2298 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2299
2300 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2301 /*
2302 * Mark the SCB has having an outstanding
2303 * task management function. Should the command
2304 * complete normally before the task management
2305 * function can be sent, the host will be notified
2306 * to abort our requeued SCB.
2307 */
2308 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2309 pending_scb->hscb->task_management);
2310 } else {
2311 /*
2312 * If non-packetized, set the MK_MESSAGE control
2313 * bit indicating that we desire to send a message.
2314 * We also set the disconnected flag since there is
2315 * no guarantee that our SCB control byte matches
2316 * the version on the card. We don't want the
2317 * sequencer to abort the command thinking an
2318 * unsolicited reselection occurred.
2319 */
2320 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2321
2322 /*
2323 * The sequencer will never re-reference the
2324 * in-core SCB. To make sure we are notified
2325 * during reselection, set the MK_MESSAGE flag in
2326 * the card's copy of the SCB.
2327 */
2328 ahd_outb(ahd, SCB_CONTROL,
2329 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2330 }
2331
2332 /*
2333 * Clear out any entries in the QINFIFO first
2334 * so we are the next SCB for this target
2335 * to run.
2336 */
2337 ahd_search_qinfifo(ahd, cmd->device->id,
2338 cmd->device->channel + 'A', cmd->device->lun,
2339 SCB_LIST_NULL, ROLE_INITIATOR,
2340 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2341 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2342 ahd_set_scbptr(ahd, saved_scbptr);
2343 ahd_print_path(ahd, pending_scb);
2344 printk("Device is disconnected, re-queuing SCB\n");
2345 wait = TRUE;
2346 } else {
2347 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2348 retval = FAILED;
2349 goto done;
2350 }
2351
2352 no_cmd:
2353 /*
2354 * Our assumption is that if we don't have the command, no
2355 * recovery action was required, so we return success. Again,
2356 * the semantics of the mid-layer recovery engine are not
2357 * well defined, so this may change in time.
2358 */
2359 retval = SUCCESS;
2360 done:
2361 if (paused)
2362 ahd_unpause(ahd);
2363 if (wait) {
2364 DECLARE_COMPLETION_ONSTACK(done);
2365
2366 ahd->platform_data->eh_done = &done;
2367 ahd_unlock(ahd, &flags);
2368
2369 printk("%s: Recovery code sleeping\n", ahd_name(ahd));
2370 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2371 ahd_lock(ahd, &flags);
2372 ahd->platform_data->eh_done = NULL;
2373 ahd_unlock(ahd, &flags);
2374 printk("%s: Timer Expired (active %d)\n",
2375 ahd_name(ahd), dev->active);
2376 retval = FAILED;
2377 }
2378 printk("Recovery code awake\n");
2379 } else
2380 ahd_unlock(ahd, &flags);
2381
2382 if (retval != SUCCESS)
2383 printk("%s: Command abort returning 0x%x\n",
2384 ahd_name(ahd), retval);
2385
2386 return retval;
2387 }
2388
2389 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2390 {
2391 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2392 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2393 struct ahd_devinfo devinfo;
2394 unsigned long flags;
2395
2396 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2397 starget->channel + 'A', ROLE_INITIATOR);
2398 ahd_lock(ahd, &flags);
2399 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2400 ahd_unlock(ahd, &flags);
2401 }
2402
2403 static void ahd_linux_set_period(struct scsi_target *starget, int period)
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_tmode_tstate *tstate;
2408 struct ahd_initiator_tinfo *tinfo
2409 = ahd_fetch_transinfo(ahd,
2410 starget->channel + 'A',
2411 shost->this_id, starget->id, &tstate);
2412 struct ahd_devinfo devinfo;
2413 unsigned int ppr_options = tinfo->goal.ppr_options;
2414 unsigned int dt;
2415 unsigned long flags;
2416 unsigned long offset = tinfo->goal.offset;
2417
2418 #ifdef AHD_DEBUG
2419 if ((ahd_debug & AHD_SHOW_DV) != 0)
2420 printk("%s: set period to %d\n", ahd_name(ahd), period);
2421 #endif
2422 if (offset == 0)
2423 offset = MAX_OFFSET;
2424
2425 if (period < 8)
2426 period = 8;
2427 if (period < 10) {
2428 if (spi_max_width(starget)) {
2429 ppr_options |= MSG_EXT_PPR_DT_REQ;
2430 if (period == 8)
2431 ppr_options |= MSG_EXT_PPR_IU_REQ;
2432 } else
2433 period = 10;
2434 }
2435
2436 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2437
2438 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2439 starget->channel + 'A', ROLE_INITIATOR);
2440
2441 /* all PPR requests apart from QAS require wide transfers */
2442 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2443 if (spi_width(starget) == 0)
2444 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2445 }
2446
2447 ahd_find_syncrate(ahd, &period, &ppr_options,
2448 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2449
2450 ahd_lock(ahd, &flags);
2451 ahd_set_syncrate(ahd, &devinfo, period, offset,
2452 ppr_options, AHD_TRANS_GOAL, FALSE);
2453 ahd_unlock(ahd, &flags);
2454 }
2455
2456 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2457 {
2458 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2459 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2460 struct ahd_tmode_tstate *tstate;
2461 struct ahd_initiator_tinfo *tinfo
2462 = ahd_fetch_transinfo(ahd,
2463 starget->channel + 'A',
2464 shost->this_id, starget->id, &tstate);
2465 struct ahd_devinfo devinfo;
2466 unsigned int ppr_options = 0;
2467 unsigned int period = 0;
2468 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2469 unsigned long flags;
2470
2471 #ifdef AHD_DEBUG
2472 if ((ahd_debug & AHD_SHOW_DV) != 0)
2473 printk("%s: set offset to %d\n", ahd_name(ahd), offset);
2474 #endif
2475
2476 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2477 starget->channel + 'A', ROLE_INITIATOR);
2478 if (offset != 0) {
2479 period = tinfo->goal.period;
2480 ppr_options = tinfo->goal.ppr_options;
2481 ahd_find_syncrate(ahd, &period, &ppr_options,
2482 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2483 }
2484
2485 ahd_lock(ahd, &flags);
2486 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2487 AHD_TRANS_GOAL, FALSE);
2488 ahd_unlock(ahd, &flags);
2489 }
2490
2491 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2492 {
2493 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2494 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2495 struct ahd_tmode_tstate *tstate;
2496 struct ahd_initiator_tinfo *tinfo
2497 = ahd_fetch_transinfo(ahd,
2498 starget->channel + 'A',
2499 shost->this_id, starget->id, &tstate);
2500 struct ahd_devinfo devinfo;
2501 unsigned int ppr_options = tinfo->goal.ppr_options
2502 & ~MSG_EXT_PPR_DT_REQ;
2503 unsigned int period = tinfo->goal.period;
2504 unsigned int width = tinfo->goal.width;
2505 unsigned long flags;
2506
2507 #ifdef AHD_DEBUG
2508 if ((ahd_debug & AHD_SHOW_DV) != 0)
2509 printk("%s: %s DT\n", ahd_name(ahd),
2510 dt ? "enabling" : "disabling");
2511 #endif
2512 if (dt && spi_max_width(starget)) {
2513 ppr_options |= MSG_EXT_PPR_DT_REQ;
2514 if (!width)
2515 ahd_linux_set_width(starget, 1);
2516 } else {
2517 if (period <= 9)
2518 period = 10; /* If resetting DT, period must be >= 25ns */
2519 /* IU is invalid without DT set */
2520 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2521 }
2522 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2523 starget->channel + 'A', ROLE_INITIATOR);
2524 ahd_find_syncrate(ahd, &period, &ppr_options,
2525 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2526
2527 ahd_lock(ahd, &flags);
2528 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2529 ppr_options, AHD_TRANS_GOAL, FALSE);
2530 ahd_unlock(ahd, &flags);
2531 }
2532
2533 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2534 {
2535 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2536 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2537 struct ahd_tmode_tstate *tstate;
2538 struct ahd_initiator_tinfo *tinfo
2539 = ahd_fetch_transinfo(ahd,
2540 starget->channel + 'A',
2541 shost->this_id, starget->id, &tstate);
2542 struct ahd_devinfo devinfo;
2543 unsigned int ppr_options = tinfo->goal.ppr_options
2544 & ~MSG_EXT_PPR_QAS_REQ;
2545 unsigned int period = tinfo->goal.period;
2546 unsigned int dt;
2547 unsigned long flags;
2548
2549 #ifdef AHD_DEBUG
2550 if ((ahd_debug & AHD_SHOW_DV) != 0)
2551 printk("%s: %s QAS\n", ahd_name(ahd),
2552 qas ? "enabling" : "disabling");
2553 #endif
2554
2555 if (qas) {
2556 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2557 }
2558
2559 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2560
2561 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2562 starget->channel + 'A', ROLE_INITIATOR);
2563 ahd_find_syncrate(ahd, &period, &ppr_options,
2564 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2565
2566 ahd_lock(ahd, &flags);
2567 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2568 ppr_options, AHD_TRANS_GOAL, FALSE);
2569 ahd_unlock(ahd, &flags);
2570 }
2571
2572 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2573 {
2574 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2575 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2576 struct ahd_tmode_tstate *tstate;
2577 struct ahd_initiator_tinfo *tinfo
2578 = ahd_fetch_transinfo(ahd,
2579 starget->channel + 'A',
2580 shost->this_id, starget->id, &tstate);
2581 struct ahd_devinfo devinfo;
2582 unsigned int ppr_options = tinfo->goal.ppr_options
2583 & ~MSG_EXT_PPR_IU_REQ;
2584 unsigned int period = tinfo->goal.period;
2585 unsigned int dt;
2586 unsigned long flags;
2587
2588 #ifdef AHD_DEBUG
2589 if ((ahd_debug & AHD_SHOW_DV) != 0)
2590 printk("%s: %s IU\n", ahd_name(ahd),
2591 iu ? "enabling" : "disabling");
2592 #endif
2593
2594 if (iu && spi_max_width(starget)) {
2595 ppr_options |= MSG_EXT_PPR_IU_REQ;
2596 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2597 }
2598
2599 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2600
2601 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2602 starget->channel + 'A', ROLE_INITIATOR);
2603 ahd_find_syncrate(ahd, &period, &ppr_options,
2604 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2605
2606 ahd_lock(ahd, &flags);
2607 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2608 ppr_options, AHD_TRANS_GOAL, FALSE);
2609 ahd_unlock(ahd, &flags);
2610 }
2611
2612 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2613 {
2614 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2615 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2616 struct ahd_tmode_tstate *tstate;
2617 struct ahd_initiator_tinfo *tinfo
2618 = ahd_fetch_transinfo(ahd,
2619 starget->channel + 'A',
2620 shost->this_id, starget->id, &tstate);
2621 struct ahd_devinfo devinfo;
2622 unsigned int ppr_options = tinfo->goal.ppr_options
2623 & ~MSG_EXT_PPR_RD_STRM;
2624 unsigned int period = tinfo->goal.period;
2625 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2626 unsigned long flags;
2627
2628 #ifdef AHD_DEBUG
2629 if ((ahd_debug & AHD_SHOW_DV) != 0)
2630 printk("%s: %s Read Streaming\n", ahd_name(ahd),
2631 rdstrm ? "enabling" : "disabling");
2632 #endif
2633
2634 if (rdstrm && spi_max_width(starget))
2635 ppr_options |= MSG_EXT_PPR_RD_STRM;
2636
2637 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2638 starget->channel + 'A', ROLE_INITIATOR);
2639 ahd_find_syncrate(ahd, &period, &ppr_options,
2640 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2641
2642 ahd_lock(ahd, &flags);
2643 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2644 ppr_options, AHD_TRANS_GOAL, FALSE);
2645 ahd_unlock(ahd, &flags);
2646 }
2647
2648 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2649 {
2650 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2651 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2652 struct ahd_tmode_tstate *tstate;
2653 struct ahd_initiator_tinfo *tinfo
2654 = ahd_fetch_transinfo(ahd,
2655 starget->channel + 'A',
2656 shost->this_id, starget->id, &tstate);
2657 struct ahd_devinfo devinfo;
2658 unsigned int ppr_options = tinfo->goal.ppr_options
2659 & ~MSG_EXT_PPR_WR_FLOW;
2660 unsigned int period = tinfo->goal.period;
2661 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2662 unsigned long flags;
2663
2664 #ifdef AHD_DEBUG
2665 if ((ahd_debug & AHD_SHOW_DV) != 0)
2666 printk("%s: %s Write Flow Control\n", ahd_name(ahd),
2667 wrflow ? "enabling" : "disabling");
2668 #endif
2669
2670 if (wrflow && spi_max_width(starget))
2671 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2672
2673 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2674 starget->channel + 'A', ROLE_INITIATOR);
2675 ahd_find_syncrate(ahd, &period, &ppr_options,
2676 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2677
2678 ahd_lock(ahd, &flags);
2679 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2680 ppr_options, AHD_TRANS_GOAL, FALSE);
2681 ahd_unlock(ahd, &flags);
2682 }
2683
2684 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2685 {
2686 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2687 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2688 struct ahd_tmode_tstate *tstate;
2689 struct ahd_initiator_tinfo *tinfo
2690 = ahd_fetch_transinfo(ahd,
2691 starget->channel + 'A',
2692 shost->this_id, starget->id, &tstate);
2693 struct ahd_devinfo devinfo;
2694 unsigned int ppr_options = tinfo->goal.ppr_options
2695 & ~MSG_EXT_PPR_RTI;
2696 unsigned int period = tinfo->goal.period;
2697 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2698 unsigned long flags;
2699
2700 if ((ahd->features & AHD_RTI) == 0) {
2701 #ifdef AHD_DEBUG
2702 if ((ahd_debug & AHD_SHOW_DV) != 0)
2703 printk("%s: RTI not available\n", ahd_name(ahd));
2704 #endif
2705 return;
2706 }
2707
2708 #ifdef AHD_DEBUG
2709 if ((ahd_debug & AHD_SHOW_DV) != 0)
2710 printk("%s: %s RTI\n", ahd_name(ahd),
2711 rti ? "enabling" : "disabling");
2712 #endif
2713
2714 if (rti && spi_max_width(starget))
2715 ppr_options |= MSG_EXT_PPR_RTI;
2716
2717 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2718 starget->channel + 'A', ROLE_INITIATOR);
2719 ahd_find_syncrate(ahd, &period, &ppr_options,
2720 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2721
2722 ahd_lock(ahd, &flags);
2723 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2724 ppr_options, AHD_TRANS_GOAL, FALSE);
2725 ahd_unlock(ahd, &flags);
2726 }
2727
2728 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2729 {
2730 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2731 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2732 struct ahd_tmode_tstate *tstate;
2733 struct ahd_initiator_tinfo *tinfo
2734 = ahd_fetch_transinfo(ahd,
2735 starget->channel + 'A',
2736 shost->this_id, starget->id, &tstate);
2737 struct ahd_devinfo devinfo;
2738 unsigned int ppr_options = tinfo->goal.ppr_options
2739 & ~MSG_EXT_PPR_PCOMP_EN;
2740 unsigned int period = tinfo->goal.period;
2741 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2742 unsigned long flags;
2743
2744 #ifdef AHD_DEBUG
2745 if ((ahd_debug & AHD_SHOW_DV) != 0)
2746 printk("%s: %s Precompensation\n", ahd_name(ahd),
2747 pcomp ? "Enable" : "Disable");
2748 #endif
2749
2750 if (pcomp && spi_max_width(starget)) {
2751 uint8_t precomp;
2752
2753 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2754 const struct ahd_linux_iocell_opts *iocell_opts;
2755
2756 iocell_opts = &aic79xx_iocell_info[ahd->unit];
2757 precomp = iocell_opts->precomp;
2758 } else {
2759 precomp = AIC79XX_DEFAULT_PRECOMP;
2760 }
2761 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2762 AHD_SET_PRECOMP(ahd, precomp);
2763 } else {
2764 AHD_SET_PRECOMP(ahd, 0);
2765 }
2766
2767 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2768 starget->channel + 'A', ROLE_INITIATOR);
2769 ahd_find_syncrate(ahd, &period, &ppr_options,
2770 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2771
2772 ahd_lock(ahd, &flags);
2773 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2774 ppr_options, AHD_TRANS_GOAL, FALSE);
2775 ahd_unlock(ahd, &flags);
2776 }
2777
2778 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2779 {
2780 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2781 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2782 struct ahd_tmode_tstate *tstate;
2783 struct ahd_initiator_tinfo *tinfo
2784 = ahd_fetch_transinfo(ahd,
2785 starget->channel + 'A',
2786 shost->this_id, starget->id, &tstate);
2787 struct ahd_devinfo devinfo;
2788 unsigned int ppr_options = tinfo->goal.ppr_options
2789 & ~MSG_EXT_PPR_HOLD_MCS;
2790 unsigned int period = tinfo->goal.period;
2791 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2792 unsigned long flags;
2793
2794 if (hold && spi_max_width(starget))
2795 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2796
2797 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2798 starget->channel + 'A', ROLE_INITIATOR);
2799 ahd_find_syncrate(ahd, &period, &ppr_options,
2800 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2801
2802 ahd_lock(ahd, &flags);
2803 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2804 ppr_options, AHD_TRANS_GOAL, FALSE);
2805 ahd_unlock(ahd, &flags);
2806 }
2807
2808 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2809 {
2810 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2811 unsigned long flags;
2812 u8 mode;
2813
2814 ahd_lock(ahd, &flags);
2815 ahd_pause(ahd);
2816 mode = ahd_inb(ahd, SBLKCTL);
2817 ahd_unpause(ahd);
2818 ahd_unlock(ahd, &flags);
2819
2820 if (mode & ENAB40)
2821 spi_signalling(shost) = SPI_SIGNAL_LVD;
2822 else if (mode & ENAB20)
2823 spi_signalling(shost) = SPI_SIGNAL_SE;
2824 else
2825 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2826 }
2827
2828 static struct spi_function_template ahd_linux_transport_functions = {
2829 .set_offset = ahd_linux_set_offset,
2830 .show_offset = 1,
2831 .set_period = ahd_linux_set_period,
2832 .show_period = 1,
2833 .set_width = ahd_linux_set_width,
2834 .show_width = 1,
2835 .set_dt = ahd_linux_set_dt,
2836 .show_dt = 1,
2837 .set_iu = ahd_linux_set_iu,
2838 .show_iu = 1,
2839 .set_qas = ahd_linux_set_qas,
2840 .show_qas = 1,
2841 .set_rd_strm = ahd_linux_set_rd_strm,
2842 .show_rd_strm = 1,
2843 .set_wr_flow = ahd_linux_set_wr_flow,
2844 .show_wr_flow = 1,
2845 .set_rti = ahd_linux_set_rti,
2846 .show_rti = 1,
2847 .set_pcomp_en = ahd_linux_set_pcomp_en,
2848 .show_pcomp_en = 1,
2849 .set_hold_mcs = ahd_linux_set_hold_mcs,
2850 .show_hold_mcs = 1,
2851 .get_signalling = ahd_linux_get_signalling,
2852 };
2853
2854 static int __init
2855 ahd_linux_init(void)
2856 {
2857 int error = 0;
2858
2859 /*
2860 * If we've been passed any parameters, process them now.
2861 */
2862 if (aic79xx)
2863 aic79xx_setup(aic79xx);
2864
2865 ahd_linux_transport_template =
2866 spi_attach_transport(&ahd_linux_transport_functions);
2867 if (!ahd_linux_transport_template)
2868 return -ENODEV;
2869
2870 scsi_transport_reserve_device(ahd_linux_transport_template,
2871 sizeof(struct ahd_linux_device));
2872
2873 error = ahd_linux_pci_init();
2874 if (error)
2875 spi_release_transport(ahd_linux_transport_template);
2876 return error;
2877 }
2878
2879 static void __exit
2880 ahd_linux_exit(void)
2881 {
2882 ahd_linux_pci_exit();
2883 spi_release_transport(ahd_linux_transport_template);
2884 }
2885
2886 module_init(ahd_linux_init);
2887 module_exit(ahd_linux_exit);
Linux with added FPC-III support