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
ahd_print_path(struct ahd_softc * ahd,struct scb * scb)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
ahd_delay(long usec)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
ahd_inb(struct ahd_softc * ahd,long port)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
ahd_outb(struct ahd_softc * ahd,long port,uint8_t val)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
ahd_outw_atomic(struct ahd_softc * ahd,long port,uint16_t val)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
ahd_outsb(struct ahd_softc * ahd,long port,uint8_t * array,int count)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
ahd_insb(struct ahd_softc * ahd,long port,uint8_t * array,int count)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
ahd_pci_read_config(ahd_dev_softc_t pci,int reg,int width)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
ahd_pci_write_config(ahd_dev_softc_t pci,int reg,uint32_t value,int width)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
ahd_linux_unmap_scb(struct ahd_softc * ahd,struct scb * scb)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 *
ahd_linux_info(struct Scsi_Host * host)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 */
ahd_linux_queue_lck(struct scsi_cmnd * cmd)575 static int ahd_linux_queue_lck(struct scsi_cmnd *cmd)
576 {
577 struct ahd_softc *ahd;
578 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
579 int rtn = SCSI_MLQUEUE_HOST_BUSY;
580
581 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
582
583 cmd->result = CAM_REQ_INPROG << 16;
584 rtn = ahd_linux_run_command(ahd, dev, cmd);
585
586 return rtn;
587 }
588
DEF_SCSI_QCMD(ahd_linux_queue)589 static DEF_SCSI_QCMD(ahd_linux_queue)
590
591 static struct scsi_target **
592 ahd_linux_target_in_softc(struct scsi_target *starget)
593 {
594 struct ahd_softc *ahd =
595 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
596 unsigned int target_offset;
597
598 target_offset = starget->id;
599 if (starget->channel != 0)
600 target_offset += 8;
601
602 return &ahd->platform_data->starget[target_offset];
603 }
604
605 static int
ahd_linux_target_alloc(struct scsi_target * starget)606 ahd_linux_target_alloc(struct scsi_target *starget)
607 {
608 struct ahd_softc *ahd =
609 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
610 struct seeprom_config *sc = ahd->seep_config;
611 unsigned long flags;
612 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
613 struct ahd_devinfo devinfo;
614 struct ahd_initiator_tinfo *tinfo;
615 struct ahd_tmode_tstate *tstate;
616 char channel = starget->channel + 'A';
617
618 ahd_lock(ahd, &flags);
619
620 BUG_ON(*ahd_targp != NULL);
621
622 *ahd_targp = starget;
623
624 if (sc) {
625 int flags = sc->device_flags[starget->id];
626
627 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
628 starget->id, &tstate);
629
630 if ((flags & CFPACKETIZED) == 0) {
631 /* don't negotiate packetized (IU) transfers */
632 spi_max_iu(starget) = 0;
633 } else {
634 if ((ahd->features & AHD_RTI) == 0)
635 spi_rti(starget) = 0;
636 }
637
638 if ((flags & CFQAS) == 0)
639 spi_max_qas(starget) = 0;
640
641 /* Transinfo values have been set to BIOS settings */
642 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
643 spi_min_period(starget) = tinfo->user.period;
644 spi_max_offset(starget) = tinfo->user.offset;
645 }
646
647 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
648 starget->id, &tstate);
649 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
650 CAM_LUN_WILDCARD, channel,
651 ROLE_INITIATOR);
652 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
653 AHD_TRANS_GOAL, /*paused*/FALSE);
654 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
655 AHD_TRANS_GOAL, /*paused*/FALSE);
656 ahd_unlock(ahd, &flags);
657
658 return 0;
659 }
660
661 static void
ahd_linux_target_destroy(struct scsi_target * starget)662 ahd_linux_target_destroy(struct scsi_target *starget)
663 {
664 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
665
666 *ahd_targp = NULL;
667 }
668
669 static int
ahd_linux_slave_alloc(struct scsi_device * sdev)670 ahd_linux_slave_alloc(struct scsi_device *sdev)
671 {
672 struct ahd_softc *ahd =
673 *((struct ahd_softc **)sdev->host->hostdata);
674 struct ahd_linux_device *dev;
675
676 if (bootverbose)
677 printk("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
678
679 dev = scsi_transport_device_data(sdev);
680 memset(dev, 0, sizeof(*dev));
681
682 /*
683 * We start out life using untagged
684 * transactions of which we allow one.
685 */
686 dev->openings = 1;
687
688 /*
689 * Set maxtags to 0. This will be changed if we
690 * later determine that we are dealing with
691 * a tagged queuing capable device.
692 */
693 dev->maxtags = 0;
694
695 return (0);
696 }
697
698 static int
ahd_linux_slave_configure(struct scsi_device * sdev)699 ahd_linux_slave_configure(struct scsi_device *sdev)
700 {
701 if (bootverbose)
702 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
703
704 ahd_linux_device_queue_depth(sdev);
705
706 /* Initial Domain Validation */
707 if (!spi_initial_dv(sdev->sdev_target))
708 spi_dv_device(sdev);
709
710 return 0;
711 }
712
713 #if defined(__i386__)
714 /*
715 * Return the disk geometry for the given SCSI device.
716 */
717 static int
ahd_linux_biosparam(struct scsi_device * sdev,struct block_device * bdev,sector_t capacity,int geom[])718 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
719 sector_t capacity, int geom[])
720 {
721 int heads;
722 int sectors;
723 int cylinders;
724 int extended;
725 struct ahd_softc *ahd;
726
727 ahd = *((struct ahd_softc **)sdev->host->hostdata);
728
729 if (scsi_partsize(bdev, capacity, geom))
730 return 0;
731
732 heads = 64;
733 sectors = 32;
734 cylinders = aic_sector_div(capacity, heads, sectors);
735
736 if (aic79xx_extended != 0)
737 extended = 1;
738 else
739 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
740 if (extended && cylinders >= 1024) {
741 heads = 255;
742 sectors = 63;
743 cylinders = aic_sector_div(capacity, heads, sectors);
744 }
745 geom[0] = heads;
746 geom[1] = sectors;
747 geom[2] = cylinders;
748 return (0);
749 }
750 #endif
751
752 /*
753 * Abort the current SCSI command(s).
754 */
755 static int
ahd_linux_abort(struct scsi_cmnd * cmd)756 ahd_linux_abort(struct scsi_cmnd *cmd)
757 {
758 return ahd_linux_queue_abort_cmd(cmd);
759 }
760
761 /*
762 * Attempt to send a target reset message to the device that timed out.
763 */
764 static int
ahd_linux_dev_reset(struct scsi_cmnd * cmd)765 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
766 {
767 struct ahd_softc *ahd;
768 struct ahd_linux_device *dev;
769 struct scb *reset_scb;
770 u_int cdb_byte;
771 int retval = SUCCESS;
772 struct ahd_initiator_tinfo *tinfo;
773 struct ahd_tmode_tstate *tstate;
774 unsigned long flags;
775 DECLARE_COMPLETION_ONSTACK(done);
776
777 reset_scb = NULL;
778
779 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
780
781 scmd_printk(KERN_INFO, cmd,
782 "Attempting to queue a TARGET RESET message:");
783
784 printk("CDB:");
785 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
786 printk(" 0x%x", cmd->cmnd[cdb_byte]);
787 printk("\n");
788
789 /*
790 * Determine if we currently own this command.
791 */
792 dev = scsi_transport_device_data(cmd->device);
793
794 if (dev == NULL) {
795 /*
796 * No target device for this command exists,
797 * so we must not still own the command.
798 */
799 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
800 return SUCCESS;
801 }
802
803 /*
804 * Generate us a new SCB
805 */
806 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
807 if (!reset_scb) {
808 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
809 return FAILED;
810 }
811
812 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
813 cmd->device->id, &tstate);
814 reset_scb->io_ctx = cmd;
815 reset_scb->platform_data->dev = dev;
816 reset_scb->sg_count = 0;
817 ahd_set_residual(reset_scb, 0);
818 ahd_set_sense_residual(reset_scb, 0);
819 reset_scb->platform_data->xfer_len = 0;
820 reset_scb->hscb->control = 0;
821 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
822 reset_scb->hscb->lun = cmd->device->lun;
823 reset_scb->hscb->cdb_len = 0;
824 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
825 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
826 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
827 reset_scb->flags |= SCB_PACKETIZED;
828 } else {
829 reset_scb->hscb->control |= MK_MESSAGE;
830 }
831 dev->openings--;
832 dev->active++;
833 dev->commands_issued++;
834
835 ahd_lock(ahd, &flags);
836
837 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
838 ahd_queue_scb(ahd, reset_scb);
839
840 ahd->platform_data->eh_done = &done;
841 ahd_unlock(ahd, &flags);
842
843 printk("%s: Device reset code sleeping\n", ahd_name(ahd));
844 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
845 ahd_lock(ahd, &flags);
846 ahd->platform_data->eh_done = NULL;
847 ahd_unlock(ahd, &flags);
848 printk("%s: Device reset timer expired (active %d)\n",
849 ahd_name(ahd), dev->active);
850 retval = FAILED;
851 }
852 printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
853
854 return (retval);
855 }
856
857 /*
858 * Reset the SCSI bus.
859 */
860 static int
ahd_linux_bus_reset(struct scsi_cmnd * cmd)861 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
862 {
863 struct ahd_softc *ahd;
864 int found;
865 unsigned long flags;
866
867 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
868 #ifdef AHD_DEBUG
869 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
870 printk("%s: Bus reset called for cmd %p\n",
871 ahd_name(ahd), cmd);
872 #endif
873 ahd_lock(ahd, &flags);
874
875 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
876 /*initiate reset*/TRUE);
877 ahd_unlock(ahd, &flags);
878
879 if (bootverbose)
880 printk("%s: SCSI bus reset delivered. "
881 "%d SCBs aborted.\n", ahd_name(ahd), found);
882
883 return (SUCCESS);
884 }
885
886 struct scsi_host_template aic79xx_driver_template = {
887 .module = THIS_MODULE,
888 .name = "aic79xx",
889 .proc_name = "aic79xx",
890 .show_info = ahd_linux_show_info,
891 .write_info = ahd_proc_write_seeprom,
892 .info = ahd_linux_info,
893 .queuecommand = ahd_linux_queue,
894 .eh_abort_handler = ahd_linux_abort,
895 .eh_device_reset_handler = ahd_linux_dev_reset,
896 .eh_bus_reset_handler = ahd_linux_bus_reset,
897 #if defined(__i386__)
898 .bios_param = ahd_linux_biosparam,
899 #endif
900 .can_queue = AHD_MAX_QUEUE,
901 .this_id = -1,
902 .max_sectors = 8192,
903 .cmd_per_lun = 2,
904 .slave_alloc = ahd_linux_slave_alloc,
905 .slave_configure = ahd_linux_slave_configure,
906 .target_alloc = ahd_linux_target_alloc,
907 .target_destroy = ahd_linux_target_destroy,
908 };
909
910 /******************************** Bus DMA *************************************/
911 int
ahd_dma_tag_create(struct ahd_softc * ahd,bus_dma_tag_t parent,bus_size_t alignment,bus_size_t boundary,dma_addr_t lowaddr,dma_addr_t highaddr,bus_dma_filter_t * filter,void * filterarg,bus_size_t maxsize,int nsegments,bus_size_t maxsegsz,int flags,bus_dma_tag_t * ret_tag)912 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
913 bus_size_t alignment, bus_size_t boundary,
914 dma_addr_t lowaddr, dma_addr_t highaddr,
915 bus_dma_filter_t *filter, void *filterarg,
916 bus_size_t maxsize, int nsegments,
917 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
918 {
919 bus_dma_tag_t dmat;
920
921 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
922 if (dmat == NULL)
923 return (ENOMEM);
924
925 /*
926 * Linux is very simplistic about DMA memory. For now don't
927 * maintain all specification information. Once Linux supplies
928 * better facilities for doing these operations, or the
929 * needs of this particular driver change, we might need to do
930 * more here.
931 */
932 dmat->alignment = alignment;
933 dmat->boundary = boundary;
934 dmat->maxsize = maxsize;
935 *ret_tag = dmat;
936 return (0);
937 }
938
939 void
ahd_dma_tag_destroy(struct ahd_softc * ahd,bus_dma_tag_t dmat)940 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
941 {
942 kfree(dmat);
943 }
944
945 int
ahd_dmamem_alloc(struct ahd_softc * ahd,bus_dma_tag_t dmat,void ** vaddr,int flags,bus_dmamap_t * mapp)946 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
947 int flags, bus_dmamap_t *mapp)
948 {
949 *vaddr = dma_alloc_coherent(&ahd->dev_softc->dev, dmat->maxsize, mapp,
950 GFP_ATOMIC);
951 if (*vaddr == NULL)
952 return (ENOMEM);
953 return(0);
954 }
955
956 void
ahd_dmamem_free(struct ahd_softc * ahd,bus_dma_tag_t dmat,void * vaddr,bus_dmamap_t map)957 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
958 void* vaddr, bus_dmamap_t map)
959 {
960 dma_free_coherent(&ahd->dev_softc->dev, dmat->maxsize, vaddr, map);
961 }
962
963 int
ahd_dmamap_load(struct ahd_softc * ahd,bus_dma_tag_t dmat,bus_dmamap_t map,void * buf,bus_size_t buflen,bus_dmamap_callback_t * cb,void * cb_arg,int flags)964 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
965 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
966 void *cb_arg, int flags)
967 {
968 /*
969 * Assume for now that this will only be used during
970 * initialization and not for per-transaction buffer mapping.
971 */
972 bus_dma_segment_t stack_sg;
973
974 stack_sg.ds_addr = map;
975 stack_sg.ds_len = dmat->maxsize;
976 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
977 return (0);
978 }
979
980 void
ahd_dmamap_destroy(struct ahd_softc * ahd,bus_dma_tag_t dmat,bus_dmamap_t map)981 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
982 {
983 }
984
985 int
ahd_dmamap_unload(struct ahd_softc * ahd,bus_dma_tag_t dmat,bus_dmamap_t map)986 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
987 {
988 /* Nothing to do */
989 return (0);
990 }
991
992 /********************* Platform Dependent Functions ***************************/
993 static void
ahd_linux_setup_iocell_info(u_long index,int instance,int targ,int32_t value)994 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
995 {
996
997 if ((instance >= 0)
998 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
999 uint8_t *iocell_info;
1000
1001 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1002 iocell_info[index] = value & 0xFFFF;
1003 if (bootverbose)
1004 printk("iocell[%d:%ld] = %d\n", instance, index, value);
1005 }
1006 }
1007
1008 static void
ahd_linux_setup_tag_info_global(char * p)1009 ahd_linux_setup_tag_info_global(char *p)
1010 {
1011 int tags, i, j;
1012
1013 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1014 printk("Setting Global Tags= %d\n", tags);
1015
1016 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
1017 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1018 aic79xx_tag_info[i].tag_commands[j] = tags;
1019 }
1020 }
1021 }
1022
1023 static void
ahd_linux_setup_tag_info(u_long arg,int instance,int targ,int32_t value)1024 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1025 {
1026
1027 if ((instance >= 0) && (targ >= 0)
1028 && (instance < ARRAY_SIZE(aic79xx_tag_info))
1029 && (targ < AHD_NUM_TARGETS)) {
1030 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1031 if (bootverbose)
1032 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
1033 }
1034 }
1035
1036 static char *
ahd_parse_brace_option(char * opt_name,char * opt_arg,char * end,int depth,void (* callback)(u_long,int,int,int32_t),u_long callback_arg)1037 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
1038 void (*callback)(u_long, int, int, int32_t),
1039 u_long callback_arg)
1040 {
1041 char *tok_end;
1042 char *tok_end2;
1043 int i;
1044 int instance;
1045 int targ;
1046 int done;
1047 char tok_list[] = {'.', ',', '{', '}', '\0'};
1048
1049 /* All options use a ':' name/arg separator */
1050 if (*opt_arg != ':')
1051 return (opt_arg);
1052 opt_arg++;
1053 instance = -1;
1054 targ = -1;
1055 done = FALSE;
1056 /*
1057 * Restore separator that may be in
1058 * the middle of our option argument.
1059 */
1060 tok_end = strchr(opt_arg, '\0');
1061 if (tok_end < end)
1062 *tok_end = ',';
1063 while (!done) {
1064 switch (*opt_arg) {
1065 case '{':
1066 if (instance == -1) {
1067 instance = 0;
1068 } else {
1069 if (depth > 1) {
1070 if (targ == -1)
1071 targ = 0;
1072 } else {
1073 printk("Malformed Option %s\n",
1074 opt_name);
1075 done = TRUE;
1076 }
1077 }
1078 opt_arg++;
1079 break;
1080 case '}':
1081 if (targ != -1)
1082 targ = -1;
1083 else if (instance != -1)
1084 instance = -1;
1085 opt_arg++;
1086 break;
1087 case ',':
1088 case '.':
1089 if (instance == -1)
1090 done = TRUE;
1091 else if (targ >= 0)
1092 targ++;
1093 else if (instance >= 0)
1094 instance++;
1095 opt_arg++;
1096 break;
1097 case '\0':
1098 done = TRUE;
1099 break;
1100 default:
1101 tok_end = end;
1102 for (i = 0; tok_list[i]; i++) {
1103 tok_end2 = strchr(opt_arg, tok_list[i]);
1104 if ((tok_end2) && (tok_end2 < tok_end))
1105 tok_end = tok_end2;
1106 }
1107 callback(callback_arg, instance, targ,
1108 simple_strtol(opt_arg, NULL, 0));
1109 opt_arg = tok_end;
1110 break;
1111 }
1112 }
1113 return (opt_arg);
1114 }
1115
1116 /*
1117 * Handle Linux boot parameters. This routine allows for assigning a value
1118 * to a parameter with a ':' between the parameter and the value.
1119 * ie. aic79xx=stpwlev:1,extended
1120 */
1121 static int
aic79xx_setup(char * s)1122 aic79xx_setup(char *s)
1123 {
1124 int i, n;
1125 char *p;
1126 char *end;
1127
1128 static const struct {
1129 const char *name;
1130 uint32_t *flag;
1131 } options[] = {
1132 { "extended", &aic79xx_extended },
1133 { "no_reset", &aic79xx_no_reset },
1134 { "verbose", &aic79xx_verbose },
1135 { "allow_memio", &aic79xx_allow_memio},
1136 #ifdef AHD_DEBUG
1137 { "debug", &ahd_debug },
1138 #endif
1139 { "periodic_otag", &aic79xx_periodic_otag },
1140 { "pci_parity", &aic79xx_pci_parity },
1141 { "seltime", &aic79xx_seltime },
1142 { "tag_info", NULL },
1143 { "global_tag_depth", NULL},
1144 { "slewrate", NULL },
1145 { "precomp", NULL },
1146 { "amplitude", NULL },
1147 { "slowcrc", &aic79xx_slowcrc },
1148 };
1149
1150 end = strchr(s, '\0');
1151
1152 /*
1153 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1154 * will never be 0 in this case.
1155 */
1156 n = 0;
1157
1158 while ((p = strsep(&s, ",.")) != NULL) {
1159 if (*p == '\0')
1160 continue;
1161 for (i = 0; i < ARRAY_SIZE(options); i++) {
1162
1163 n = strlen(options[i].name);
1164 if (strncmp(options[i].name, p, n) == 0)
1165 break;
1166 }
1167 if (i == ARRAY_SIZE(options))
1168 continue;
1169
1170 if (strncmp(p, "global_tag_depth", n) == 0) {
1171 ahd_linux_setup_tag_info_global(p + n);
1172 } else if (strncmp(p, "tag_info", n) == 0) {
1173 s = ahd_parse_brace_option("tag_info", p + n, end,
1174 2, ahd_linux_setup_tag_info, 0);
1175 } else if (strncmp(p, "slewrate", n) == 0) {
1176 s = ahd_parse_brace_option("slewrate",
1177 p + n, end, 1, ahd_linux_setup_iocell_info,
1178 AIC79XX_SLEWRATE_INDEX);
1179 } else if (strncmp(p, "precomp", n) == 0) {
1180 s = ahd_parse_brace_option("precomp",
1181 p + n, end, 1, ahd_linux_setup_iocell_info,
1182 AIC79XX_PRECOMP_INDEX);
1183 } else if (strncmp(p, "amplitude", n) == 0) {
1184 s = ahd_parse_brace_option("amplitude",
1185 p + n, end, 1, ahd_linux_setup_iocell_info,
1186 AIC79XX_AMPLITUDE_INDEX);
1187 } else if (p[n] == ':') {
1188 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1189 } else if (!strncmp(p, "verbose", n)) {
1190 *(options[i].flag) = 1;
1191 } else {
1192 *(options[i].flag) ^= 0xFFFFFFFF;
1193 }
1194 }
1195 return 1;
1196 }
1197
1198 __setup("aic79xx=", aic79xx_setup);
1199
1200 uint32_t aic79xx_verbose;
1201
1202 int
ahd_linux_register_host(struct ahd_softc * ahd,struct scsi_host_template * template)1203 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1204 {
1205 char buf[80];
1206 struct Scsi_Host *host;
1207 char *new_name;
1208 u_long s;
1209 int retval;
1210
1211 template->name = ahd->description;
1212 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1213 if (host == NULL)
1214 return (ENOMEM);
1215
1216 *((struct ahd_softc **)host->hostdata) = ahd;
1217 ahd->platform_data->host = host;
1218 host->can_queue = AHD_MAX_QUEUE;
1219 host->cmd_per_lun = 2;
1220 host->sg_tablesize = AHD_NSEG;
1221 host->this_id = ahd->our_id;
1222 host->irq = ahd->platform_data->irq;
1223 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1224 host->max_lun = AHD_NUM_LUNS;
1225 host->max_channel = 0;
1226 host->sg_tablesize = AHD_NSEG;
1227 ahd_lock(ahd, &s);
1228 ahd_set_unit(ahd, ahd_linux_unit++);
1229 ahd_unlock(ahd, &s);
1230 sprintf(buf, "scsi%d", host->host_no);
1231 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1232 if (new_name != NULL) {
1233 strcpy(new_name, buf);
1234 ahd_set_name(ahd, new_name);
1235 }
1236 host->unique_id = ahd->unit;
1237 ahd_linux_initialize_scsi_bus(ahd);
1238 ahd_intr_enable(ahd, TRUE);
1239
1240 host->transportt = ahd_linux_transport_template;
1241
1242 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1243 if (retval) {
1244 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1245 scsi_host_put(host);
1246 return retval;
1247 }
1248
1249 scsi_scan_host(host);
1250 return 0;
1251 }
1252
1253 /*
1254 * Place the SCSI bus into a known state by either resetting it,
1255 * or forcing transfer negotiations on the next command to any
1256 * target.
1257 */
1258 static void
ahd_linux_initialize_scsi_bus(struct ahd_softc * ahd)1259 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1260 {
1261 u_int target_id;
1262 u_int numtarg;
1263 unsigned long s;
1264
1265 target_id = 0;
1266 numtarg = 0;
1267
1268 if (aic79xx_no_reset != 0)
1269 ahd->flags &= ~AHD_RESET_BUS_A;
1270
1271 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1272 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1273 else
1274 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1275
1276 ahd_lock(ahd, &s);
1277
1278 /*
1279 * Force negotiation to async for all targets that
1280 * will not see an initial bus reset.
1281 */
1282 for (; target_id < numtarg; target_id++) {
1283 struct ahd_devinfo devinfo;
1284 struct ahd_initiator_tinfo *tinfo;
1285 struct ahd_tmode_tstate *tstate;
1286
1287 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1288 target_id, &tstate);
1289 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1290 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1291 ahd_update_neg_request(ahd, &devinfo, tstate,
1292 tinfo, AHD_NEG_ALWAYS);
1293 }
1294 ahd_unlock(ahd, &s);
1295 /* Give the bus some time to recover */
1296 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1297 ahd_freeze_simq(ahd);
1298 msleep(AIC79XX_RESET_DELAY);
1299 ahd_release_simq(ahd);
1300 }
1301 }
1302
1303 int
ahd_platform_alloc(struct ahd_softc * ahd,void * platform_arg)1304 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1305 {
1306 ahd->platform_data =
1307 kzalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC);
1308 if (ahd->platform_data == NULL)
1309 return (ENOMEM);
1310 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1311 ahd_lockinit(ahd);
1312 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1313 return (0);
1314 }
1315
1316 void
ahd_platform_free(struct ahd_softc * ahd)1317 ahd_platform_free(struct ahd_softc *ahd)
1318 {
1319 struct scsi_target *starget;
1320 int i;
1321
1322 if (ahd->platform_data != NULL) {
1323 /* destroy all of the device and target objects */
1324 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1325 starget = ahd->platform_data->starget[i];
1326 if (starget != NULL) {
1327 ahd->platform_data->starget[i] = NULL;
1328 }
1329 }
1330
1331 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1332 free_irq(ahd->platform_data->irq, ahd);
1333 if (ahd->tags[0] == BUS_SPACE_PIO
1334 && ahd->bshs[0].ioport != 0)
1335 release_region(ahd->bshs[0].ioport, 256);
1336 if (ahd->tags[1] == BUS_SPACE_PIO
1337 && ahd->bshs[1].ioport != 0)
1338 release_region(ahd->bshs[1].ioport, 256);
1339 if (ahd->tags[0] == BUS_SPACE_MEMIO
1340 && ahd->bshs[0].maddr != NULL) {
1341 iounmap(ahd->bshs[0].maddr);
1342 release_mem_region(ahd->platform_data->mem_busaddr,
1343 0x1000);
1344 }
1345 if (ahd->platform_data->host)
1346 scsi_host_put(ahd->platform_data->host);
1347
1348 kfree(ahd->platform_data);
1349 }
1350 }
1351
1352 void
ahd_platform_init(struct ahd_softc * ahd)1353 ahd_platform_init(struct ahd_softc *ahd)
1354 {
1355 /*
1356 * Lookup and commit any modified IO Cell options.
1357 */
1358 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1359 const struct ahd_linux_iocell_opts *iocell_opts;
1360
1361 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1362 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1363 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1364 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1365 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1366 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1367 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1368 }
1369
1370 }
1371
1372 void
ahd_platform_freeze_devq(struct ahd_softc * ahd,struct scb * scb)1373 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1374 {
1375 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1376 SCB_GET_CHANNEL(ahd, scb),
1377 SCB_GET_LUN(scb), SCB_LIST_NULL,
1378 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1379 }
1380
1381 void
ahd_platform_set_tags(struct ahd_softc * ahd,struct scsi_device * sdev,struct ahd_devinfo * devinfo,ahd_queue_alg alg)1382 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1383 struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1384 {
1385 struct ahd_linux_device *dev;
1386 int was_queuing;
1387 int now_queuing;
1388
1389 if (sdev == NULL)
1390 return;
1391
1392 dev = scsi_transport_device_data(sdev);
1393
1394 if (dev == NULL)
1395 return;
1396 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1397 switch (alg) {
1398 default:
1399 case AHD_QUEUE_NONE:
1400 now_queuing = 0;
1401 break;
1402 case AHD_QUEUE_BASIC:
1403 now_queuing = AHD_DEV_Q_BASIC;
1404 break;
1405 case AHD_QUEUE_TAGGED:
1406 now_queuing = AHD_DEV_Q_TAGGED;
1407 break;
1408 }
1409 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1410 && (was_queuing != now_queuing)
1411 && (dev->active != 0)) {
1412 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1413 dev->qfrozen++;
1414 }
1415
1416 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1417 if (now_queuing) {
1418 u_int usertags;
1419
1420 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1421 if (!was_queuing) {
1422 /*
1423 * Start out aggressively and allow our
1424 * dynamic queue depth algorithm to take
1425 * care of the rest.
1426 */
1427 dev->maxtags = usertags;
1428 dev->openings = dev->maxtags - dev->active;
1429 }
1430 if (dev->maxtags == 0) {
1431 /*
1432 * Queueing is disabled by the user.
1433 */
1434 dev->openings = 1;
1435 } else if (alg == AHD_QUEUE_TAGGED) {
1436 dev->flags |= AHD_DEV_Q_TAGGED;
1437 if (aic79xx_periodic_otag != 0)
1438 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1439 } else
1440 dev->flags |= AHD_DEV_Q_BASIC;
1441 } else {
1442 /* We can only have one opening. */
1443 dev->maxtags = 0;
1444 dev->openings = 1 - dev->active;
1445 }
1446
1447 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1448 case AHD_DEV_Q_BASIC:
1449 case AHD_DEV_Q_TAGGED:
1450 scsi_change_queue_depth(sdev,
1451 dev->openings + dev->active);
1452 break;
1453 default:
1454 /*
1455 * We allow the OS to queue 2 untagged transactions to
1456 * us at any time even though we can only execute them
1457 * serially on the controller/device. This should
1458 * remove some latency.
1459 */
1460 scsi_change_queue_depth(sdev, 1);
1461 break;
1462 }
1463 }
1464
1465 int
ahd_platform_abort_scbs(struct ahd_softc * ahd,int target,char channel,int lun,u_int tag,role_t role,uint32_t status)1466 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1467 int lun, u_int tag, role_t role, uint32_t status)
1468 {
1469 return 0;
1470 }
1471
1472 static u_int
ahd_linux_user_tagdepth(struct ahd_softc * ahd,struct ahd_devinfo * devinfo)1473 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1474 {
1475 static int warned_user;
1476 u_int tags;
1477
1478 tags = 0;
1479 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1480 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1481
1482 if (warned_user == 0) {
1483 printk(KERN_WARNING
1484 "aic79xx: WARNING: Insufficient tag_info instances\n"
1485 "aic79xx: for installed controllers. Using defaults\n"
1486 "aic79xx: Please update the aic79xx_tag_info array in\n"
1487 "aic79xx: the aic79xx_osm.c source file.\n");
1488 warned_user++;
1489 }
1490 tags = AHD_MAX_QUEUE;
1491 } else {
1492 adapter_tag_info_t *tag_info;
1493
1494 tag_info = &aic79xx_tag_info[ahd->unit];
1495 tags = tag_info->tag_commands[devinfo->target_offset];
1496 if (tags > AHD_MAX_QUEUE)
1497 tags = AHD_MAX_QUEUE;
1498 }
1499 }
1500 return (tags);
1501 }
1502
1503 /*
1504 * Determines the queue depth for a given device.
1505 */
1506 static void
ahd_linux_device_queue_depth(struct scsi_device * sdev)1507 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1508 {
1509 struct ahd_devinfo devinfo;
1510 u_int tags;
1511 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1512
1513 ahd_compile_devinfo(&devinfo,
1514 ahd->our_id,
1515 sdev->sdev_target->id, sdev->lun,
1516 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1517 ROLE_INITIATOR);
1518 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1519 if (tags != 0 && sdev->tagged_supported != 0) {
1520
1521 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1522 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1523 devinfo.lun, AC_TRANSFER_NEG);
1524 ahd_print_devinfo(ahd, &devinfo);
1525 printk("Tagged Queuing enabled. Depth %d\n", tags);
1526 } else {
1527 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1528 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1529 devinfo.lun, AC_TRANSFER_NEG);
1530 }
1531 }
1532
1533 static int
ahd_linux_run_command(struct ahd_softc * ahd,struct ahd_linux_device * dev,struct scsi_cmnd * cmd)1534 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1535 struct scsi_cmnd *cmd)
1536 {
1537 struct scb *scb;
1538 struct hardware_scb *hscb;
1539 struct ahd_initiator_tinfo *tinfo;
1540 struct ahd_tmode_tstate *tstate;
1541 u_int col_idx;
1542 uint16_t mask;
1543 unsigned long flags;
1544 int nseg;
1545
1546 nseg = scsi_dma_map(cmd);
1547 if (nseg < 0)
1548 return SCSI_MLQUEUE_HOST_BUSY;
1549
1550 ahd_lock(ahd, &flags);
1551
1552 /*
1553 * Get an scb to use.
1554 */
1555 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1556 cmd->device->id, &tstate);
1557 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1558 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1559 col_idx = AHD_NEVER_COL_IDX;
1560 } else {
1561 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1562 cmd->device->lun);
1563 }
1564 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1565 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1566 ahd_unlock(ahd, &flags);
1567 scsi_dma_unmap(cmd);
1568 return SCSI_MLQUEUE_HOST_BUSY;
1569 }
1570
1571 scb->io_ctx = cmd;
1572 scb->platform_data->dev = dev;
1573 hscb = scb->hscb;
1574 cmd->host_scribble = (char *)scb;
1575
1576 /*
1577 * Fill out basics of the HSCB.
1578 */
1579 hscb->control = 0;
1580 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1581 hscb->lun = cmd->device->lun;
1582 scb->hscb->task_management = 0;
1583 mask = SCB_GET_TARGET_MASK(ahd, scb);
1584
1585 if ((ahd->user_discenable & mask) != 0)
1586 hscb->control |= DISCENB;
1587
1588 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1589 scb->flags |= SCB_PACKETIZED;
1590
1591 if ((tstate->auto_negotiate & mask) != 0) {
1592 scb->flags |= SCB_AUTO_NEGOTIATE;
1593 scb->hscb->control |= MK_MESSAGE;
1594 }
1595
1596 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1597 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1598 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1599 hscb->control |= ORDERED_QUEUE_TAG;
1600 dev->commands_since_idle_or_otag = 0;
1601 } else {
1602 hscb->control |= SIMPLE_QUEUE_TAG;
1603 }
1604 }
1605
1606 hscb->cdb_len = cmd->cmd_len;
1607 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1608
1609 scb->platform_data->xfer_len = 0;
1610 ahd_set_residual(scb, 0);
1611 ahd_set_sense_residual(scb, 0);
1612 scb->sg_count = 0;
1613
1614 if (nseg > 0) {
1615 void *sg = scb->sg_list;
1616 struct scatterlist *cur_seg;
1617 int i;
1618
1619 scb->platform_data->xfer_len = 0;
1620
1621 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1622 dma_addr_t addr;
1623 bus_size_t len;
1624
1625 addr = sg_dma_address(cur_seg);
1626 len = sg_dma_len(cur_seg);
1627 scb->platform_data->xfer_len += len;
1628 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1629 i == (nseg - 1));
1630 }
1631 }
1632
1633 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1634 dev->openings--;
1635 dev->active++;
1636 dev->commands_issued++;
1637
1638 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1639 dev->commands_since_idle_or_otag++;
1640 scb->flags |= SCB_ACTIVE;
1641 ahd_queue_scb(ahd, scb);
1642
1643 ahd_unlock(ahd, &flags);
1644
1645 return 0;
1646 }
1647
1648 /*
1649 * SCSI controller interrupt handler.
1650 */
1651 irqreturn_t
ahd_linux_isr(int irq,void * dev_id)1652 ahd_linux_isr(int irq, void *dev_id)
1653 {
1654 struct ahd_softc *ahd;
1655 u_long flags;
1656 int ours;
1657
1658 ahd = (struct ahd_softc *) dev_id;
1659 ahd_lock(ahd, &flags);
1660 ours = ahd_intr(ahd);
1661 ahd_unlock(ahd, &flags);
1662 return IRQ_RETVAL(ours);
1663 }
1664
1665 void
ahd_send_async(struct ahd_softc * ahd,char channel,u_int target,u_int lun,ac_code code)1666 ahd_send_async(struct ahd_softc *ahd, char channel,
1667 u_int target, u_int lun, ac_code code)
1668 {
1669 switch (code) {
1670 case AC_TRANSFER_NEG:
1671 {
1672 struct scsi_target *starget;
1673 struct ahd_initiator_tinfo *tinfo;
1674 struct ahd_tmode_tstate *tstate;
1675 unsigned int target_ppr_options;
1676
1677 BUG_ON(target == CAM_TARGET_WILDCARD);
1678
1679 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1680 target, &tstate);
1681
1682 /*
1683 * Don't bother reporting results while
1684 * negotiations are still pending.
1685 */
1686 if (tinfo->curr.period != tinfo->goal.period
1687 || tinfo->curr.width != tinfo->goal.width
1688 || tinfo->curr.offset != tinfo->goal.offset
1689 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1690 if (bootverbose == 0)
1691 break;
1692
1693 /*
1694 * Don't bother reporting results that
1695 * are identical to those last reported.
1696 */
1697 starget = ahd->platform_data->starget[target];
1698 if (starget == NULL)
1699 break;
1700
1701 target_ppr_options =
1702 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1703 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1704 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1705 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1706 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1707 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1708 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1709 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1710
1711 if (tinfo->curr.period == spi_period(starget)
1712 && tinfo->curr.width == spi_width(starget)
1713 && tinfo->curr.offset == spi_offset(starget)
1714 && tinfo->curr.ppr_options == target_ppr_options)
1715 if (bootverbose == 0)
1716 break;
1717
1718 spi_period(starget) = tinfo->curr.period;
1719 spi_width(starget) = tinfo->curr.width;
1720 spi_offset(starget) = tinfo->curr.offset;
1721 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1722 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1723 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1724 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1725 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1726 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1727 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1728 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1729 spi_display_xfer_agreement(starget);
1730 break;
1731 }
1732 case AC_SENT_BDR:
1733 {
1734 WARN_ON(lun != CAM_LUN_WILDCARD);
1735 scsi_report_device_reset(ahd->platform_data->host,
1736 channel - 'A', target);
1737 break;
1738 }
1739 case AC_BUS_RESET:
1740 if (ahd->platform_data->host != NULL) {
1741 scsi_report_bus_reset(ahd->platform_data->host,
1742 channel - 'A');
1743 }
1744 break;
1745 default:
1746 panic("ahd_send_async: Unexpected async event");
1747 }
1748 }
1749
1750 /*
1751 * Calls the higher level scsi done function and frees the scb.
1752 */
1753 void
ahd_done(struct ahd_softc * ahd,struct scb * scb)1754 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1755 {
1756 struct scsi_cmnd *cmd;
1757 struct ahd_linux_device *dev;
1758
1759 if ((scb->flags & SCB_ACTIVE) == 0) {
1760 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1761 ahd_dump_card_state(ahd);
1762 panic("Stopping for safety");
1763 }
1764 LIST_REMOVE(scb, pending_links);
1765 cmd = scb->io_ctx;
1766 dev = scb->platform_data->dev;
1767 dev->active--;
1768 dev->openings++;
1769 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1770 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1771 dev->qfrozen--;
1772 }
1773 ahd_linux_unmap_scb(ahd, scb);
1774
1775 /*
1776 * Guard against stale sense data.
1777 * The Linux mid-layer assumes that sense
1778 * was retrieved anytime the first byte of
1779 * the sense buffer looks "sane".
1780 */
1781 cmd->sense_buffer[0] = 0;
1782 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1783 #ifdef AHD_REPORT_UNDERFLOWS
1784 uint32_t amount_xferred;
1785
1786 amount_xferred =
1787 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1788 #endif
1789 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1790 #ifdef AHD_DEBUG
1791 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1792 ahd_print_path(ahd, scb);
1793 printk("Set CAM_UNCOR_PARITY\n");
1794 }
1795 #endif
1796 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1797 #ifdef AHD_REPORT_UNDERFLOWS
1798 /*
1799 * This code is disabled by default as some
1800 * clients of the SCSI system do not properly
1801 * initialize the underflow parameter. This
1802 * results in spurious termination of commands
1803 * that complete as expected (e.g. underflow is
1804 * allowed as command can return variable amounts
1805 * of data.
1806 */
1807 } else if (amount_xferred < scb->io_ctx->underflow) {
1808 u_int i;
1809
1810 ahd_print_path(ahd, scb);
1811 printk("CDB:");
1812 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1813 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1814 printk("\n");
1815 ahd_print_path(ahd, scb);
1816 printk("Saw underflow (%ld of %ld bytes). "
1817 "Treated as error\n",
1818 ahd_get_residual(scb),
1819 ahd_get_transfer_length(scb));
1820 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1821 #endif
1822 } else {
1823 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1824 }
1825 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1826 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1827 }
1828
1829 if (dev->openings == 1
1830 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1831 && ahd_get_scsi_status(scb) != SAM_STAT_TASK_SET_FULL)
1832 dev->tag_success_count++;
1833 /*
1834 * Some devices deal with temporary internal resource
1835 * shortages by returning queue full. When the queue
1836 * full occurrs, we throttle back. Slowly try to get
1837 * back to our previous queue depth.
1838 */
1839 if ((dev->openings + dev->active) < dev->maxtags
1840 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1841 dev->tag_success_count = 0;
1842 dev->openings++;
1843 }
1844
1845 if (dev->active == 0)
1846 dev->commands_since_idle_or_otag = 0;
1847
1848 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1849 printk("Recovery SCB completes\n");
1850 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1851 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1852 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1853
1854 if (ahd->platform_data->eh_done)
1855 complete(ahd->platform_data->eh_done);
1856 }
1857
1858 ahd_free_scb(ahd, scb);
1859 ahd_linux_queue_cmd_complete(ahd, cmd);
1860 }
1861
1862 static void
ahd_linux_handle_scsi_status(struct ahd_softc * ahd,struct scsi_device * sdev,struct scb * scb)1863 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1864 struct scsi_device *sdev, struct scb *scb)
1865 {
1866 struct ahd_devinfo devinfo;
1867 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1868
1869 ahd_compile_devinfo(&devinfo,
1870 ahd->our_id,
1871 sdev->sdev_target->id, sdev->lun,
1872 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1873 ROLE_INITIATOR);
1874
1875 /*
1876 * We don't currently trust the mid-layer to
1877 * properly deal with queue full or busy. So,
1878 * when one occurs, we tell the mid-layer to
1879 * unconditionally requeue the command to us
1880 * so that we can retry it ourselves. We also
1881 * implement our own throttling mechanism so
1882 * we don't clobber the device with too many
1883 * commands.
1884 */
1885 switch (ahd_get_scsi_status(scb)) {
1886 default:
1887 break;
1888 case SAM_STAT_CHECK_CONDITION:
1889 case SAM_STAT_COMMAND_TERMINATED:
1890 {
1891 struct scsi_cmnd *cmd;
1892
1893 /*
1894 * Copy sense information to the OS's cmd
1895 * structure if it is available.
1896 */
1897 cmd = scb->io_ctx;
1898 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1899 struct scsi_status_iu_header *siu;
1900 u_int sense_size;
1901 u_int sense_offset;
1902
1903 if (scb->flags & SCB_SENSE) {
1904 sense_size = min(sizeof(struct scsi_sense_data)
1905 - ahd_get_sense_residual(scb),
1906 (u_long)SCSI_SENSE_BUFFERSIZE);
1907 sense_offset = 0;
1908 } else {
1909 /*
1910 * Copy only the sense data into the provided
1911 * buffer.
1912 */
1913 siu = (struct scsi_status_iu_header *)
1914 scb->sense_data;
1915 sense_size = min_t(size_t,
1916 scsi_4btoul(siu->sense_length),
1917 SCSI_SENSE_BUFFERSIZE);
1918 sense_offset = SIU_SENSE_OFFSET(siu);
1919 }
1920
1921 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1922 memcpy(cmd->sense_buffer,
1923 ahd_get_sense_buf(ahd, scb)
1924 + sense_offset, sense_size);
1925 set_status_byte(cmd, SAM_STAT_CHECK_CONDITION);
1926
1927 #ifdef AHD_DEBUG
1928 if (ahd_debug & AHD_SHOW_SENSE) {
1929 int i;
1930
1931 printk("Copied %d bytes of sense data at %d:",
1932 sense_size, sense_offset);
1933 for (i = 0; i < sense_size; i++) {
1934 if ((i & 0xF) == 0)
1935 printk("\n");
1936 printk("0x%x ", cmd->sense_buffer[i]);
1937 }
1938 printk("\n");
1939 }
1940 #endif
1941 }
1942 break;
1943 }
1944 case SAM_STAT_TASK_SET_FULL:
1945 /*
1946 * By the time the core driver has returned this
1947 * command, all other commands that were queued
1948 * to us but not the device have been returned.
1949 * This ensures that dev->active is equal to
1950 * the number of commands actually queued to
1951 * the device.
1952 */
1953 dev->tag_success_count = 0;
1954 if (dev->active != 0) {
1955 /*
1956 * Drop our opening count to the number
1957 * of commands currently outstanding.
1958 */
1959 dev->openings = 0;
1960 #ifdef AHD_DEBUG
1961 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1962 ahd_print_path(ahd, scb);
1963 printk("Dropping tag count to %d\n",
1964 dev->active);
1965 }
1966 #endif
1967 if (dev->active == dev->tags_on_last_queuefull) {
1968
1969 dev->last_queuefull_same_count++;
1970 /*
1971 * If we repeatedly see a queue full
1972 * at the same queue depth, this
1973 * device has a fixed number of tag
1974 * slots. Lock in this tag depth
1975 * so we stop seeing queue fulls from
1976 * this device.
1977 */
1978 if (dev->last_queuefull_same_count
1979 == AHD_LOCK_TAGS_COUNT) {
1980 dev->maxtags = dev->active;
1981 ahd_print_path(ahd, scb);
1982 printk("Locking max tag count at %d\n",
1983 dev->active);
1984 }
1985 } else {
1986 dev->tags_on_last_queuefull = dev->active;
1987 dev->last_queuefull_same_count = 0;
1988 }
1989 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1990 ahd_set_scsi_status(scb, SAM_STAT_GOOD);
1991 ahd_platform_set_tags(ahd, sdev, &devinfo,
1992 (dev->flags & AHD_DEV_Q_BASIC)
1993 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1994 break;
1995 }
1996 /*
1997 * Drop down to a single opening, and treat this
1998 * as if the target returned BUSY SCSI status.
1999 */
2000 dev->openings = 1;
2001 ahd_platform_set_tags(ahd, sdev, &devinfo,
2002 (dev->flags & AHD_DEV_Q_BASIC)
2003 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2004 ahd_set_scsi_status(scb, SAM_STAT_BUSY);
2005 }
2006 }
2007
2008 static void
ahd_linux_queue_cmd_complete(struct ahd_softc * ahd,struct scsi_cmnd * cmd)2009 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
2010 {
2011 int status;
2012 int new_status = DID_OK;
2013 int do_fallback = 0;
2014 int scsi_status;
2015 struct scsi_sense_data *sense;
2016
2017 /*
2018 * Map CAM error codes into Linux Error codes. We
2019 * avoid the conversion so that the DV code has the
2020 * full error information available when making
2021 * state change decisions.
2022 */
2023
2024 status = ahd_cmd_get_transaction_status(cmd);
2025 switch (status) {
2026 case CAM_REQ_INPROG:
2027 case CAM_REQ_CMP:
2028 new_status = DID_OK;
2029 break;
2030 case CAM_AUTOSENSE_FAIL:
2031 new_status = DID_ERROR;
2032 fallthrough;
2033 case CAM_SCSI_STATUS_ERROR:
2034 scsi_status = ahd_cmd_get_scsi_status(cmd);
2035
2036 switch(scsi_status) {
2037 case SAM_STAT_COMMAND_TERMINATED:
2038 case SAM_STAT_CHECK_CONDITION:
2039 sense = (struct scsi_sense_data *)
2040 cmd->sense_buffer;
2041 if (sense->extra_len >= 5 &&
2042 (sense->add_sense_code == 0x47
2043 || sense->add_sense_code == 0x48))
2044 do_fallback = 1;
2045 break;
2046 default:
2047 break;
2048 }
2049 break;
2050 case CAM_REQ_ABORTED:
2051 new_status = DID_ABORT;
2052 break;
2053 case CAM_BUSY:
2054 new_status = DID_BUS_BUSY;
2055 break;
2056 case CAM_REQ_INVALID:
2057 case CAM_PATH_INVALID:
2058 new_status = DID_BAD_TARGET;
2059 break;
2060 case CAM_SEL_TIMEOUT:
2061 new_status = DID_NO_CONNECT;
2062 break;
2063 case CAM_SCSI_BUS_RESET:
2064 case CAM_BDR_SENT:
2065 new_status = DID_RESET;
2066 break;
2067 case CAM_UNCOR_PARITY:
2068 new_status = DID_PARITY;
2069 do_fallback = 1;
2070 break;
2071 case CAM_CMD_TIMEOUT:
2072 new_status = DID_TIME_OUT;
2073 do_fallback = 1;
2074 break;
2075 case CAM_REQ_CMP_ERR:
2076 case CAM_UNEXP_BUSFREE:
2077 case CAM_DATA_RUN_ERR:
2078 new_status = DID_ERROR;
2079 do_fallback = 1;
2080 break;
2081 case CAM_UA_ABORT:
2082 case CAM_NO_HBA:
2083 case CAM_SEQUENCE_FAIL:
2084 case CAM_CCB_LEN_ERR:
2085 case CAM_PROVIDE_FAIL:
2086 case CAM_REQ_TERMIO:
2087 case CAM_UNREC_HBA_ERROR:
2088 case CAM_REQ_TOO_BIG:
2089 new_status = DID_ERROR;
2090 break;
2091 case CAM_REQUEUE_REQ:
2092 new_status = DID_REQUEUE;
2093 break;
2094 default:
2095 /* We should never get here */
2096 new_status = DID_ERROR;
2097 break;
2098 }
2099
2100 if (do_fallback) {
2101 printk("%s: device overrun (status %x) on %d:%d:%d\n",
2102 ahd_name(ahd), status, cmd->device->channel,
2103 cmd->device->id, (u8)cmd->device->lun);
2104 }
2105
2106 ahd_cmd_set_transaction_status(cmd, new_status);
2107
2108 scsi_done(cmd);
2109 }
2110
2111 static void
ahd_freeze_simq(struct ahd_softc * ahd)2112 ahd_freeze_simq(struct ahd_softc *ahd)
2113 {
2114 scsi_block_requests(ahd->platform_data->host);
2115 }
2116
2117 static void
ahd_release_simq(struct ahd_softc * ahd)2118 ahd_release_simq(struct ahd_softc *ahd)
2119 {
2120 scsi_unblock_requests(ahd->platform_data->host);
2121 }
2122
2123 static int
ahd_linux_queue_abort_cmd(struct scsi_cmnd * cmd)2124 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2125 {
2126 struct ahd_softc *ahd;
2127 struct ahd_linux_device *dev;
2128 struct scb *pending_scb;
2129 u_int saved_scbptr;
2130 u_int active_scbptr;
2131 u_int last_phase;
2132 u_int cdb_byte;
2133 int retval = SUCCESS;
2134 int was_paused;
2135 int paused;
2136 int wait;
2137 int disconnected;
2138 ahd_mode_state saved_modes;
2139 unsigned long flags;
2140
2141 pending_scb = NULL;
2142 paused = FALSE;
2143 wait = FALSE;
2144 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2145
2146 scmd_printk(KERN_INFO, cmd,
2147 "Attempting to queue an ABORT message:");
2148
2149 printk("CDB:");
2150 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2151 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2152 printk("\n");
2153
2154 ahd_lock(ahd, &flags);
2155
2156 /*
2157 * First determine if we currently own this command.
2158 * Start by searching the device queue. If not found
2159 * there, check the pending_scb list. If not found
2160 * at all, and the system wanted us to just abort the
2161 * command, return success.
2162 */
2163 dev = scsi_transport_device_data(cmd->device);
2164
2165 if (dev == NULL) {
2166 /*
2167 * No target device for this command exists,
2168 * so we must not still own the command.
2169 */
2170 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2171 goto done;
2172 }
2173
2174 /*
2175 * See if we can find a matching cmd in the pending list.
2176 */
2177 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2178 if (pending_scb->io_ctx == cmd)
2179 break;
2180 }
2181
2182 if (pending_scb == NULL) {
2183 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2184 goto done;
2185 }
2186
2187 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2188 /*
2189 * We can't queue two recovery actions using the same SCB
2190 */
2191 retval = FAILED;
2192 goto done;
2193 }
2194
2195 /*
2196 * Ensure that the card doesn't do anything
2197 * behind our back. Also make sure that we
2198 * didn't "just" miss an interrupt that would
2199 * affect this cmd.
2200 */
2201 was_paused = ahd_is_paused(ahd);
2202 ahd_pause_and_flushwork(ahd);
2203 paused = TRUE;
2204
2205 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2206 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2207 goto done;
2208 }
2209
2210 printk("%s: At time of recovery, card was %spaused\n",
2211 ahd_name(ahd), was_paused ? "" : "not ");
2212 ahd_dump_card_state(ahd);
2213
2214 disconnected = TRUE;
2215 if (ahd_search_qinfifo(ahd, cmd->device->id,
2216 cmd->device->channel + 'A',
2217 cmd->device->lun,
2218 pending_scb->hscb->tag,
2219 ROLE_INITIATOR, CAM_REQ_ABORTED,
2220 SEARCH_COMPLETE) > 0) {
2221 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2222 ahd_name(ahd), cmd->device->channel,
2223 cmd->device->id, (u8)cmd->device->lun);
2224 goto done;
2225 }
2226
2227 saved_modes = ahd_save_modes(ahd);
2228 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2229 last_phase = ahd_inb(ahd, LASTPHASE);
2230 saved_scbptr = ahd_get_scbptr(ahd);
2231 active_scbptr = saved_scbptr;
2232 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2233 struct scb *bus_scb;
2234
2235 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2236 if (bus_scb == pending_scb)
2237 disconnected = FALSE;
2238 }
2239
2240 /*
2241 * At this point, pending_scb is the scb associated with the
2242 * passed in command. That command is currently active on the
2243 * bus or is in the disconnected state.
2244 */
2245 ahd_inb(ahd, SAVED_SCSIID);
2246 if (last_phase != P_BUSFREE
2247 && SCB_GET_TAG(pending_scb) == active_scbptr) {
2248
2249 /*
2250 * We're active on the bus, so assert ATN
2251 * and hope that the target responds.
2252 */
2253 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2254 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2255 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2256 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2257 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2258 wait = TRUE;
2259 } else if (disconnected) {
2260
2261 /*
2262 * Actually re-queue this SCB in an attempt
2263 * to select the device before it reconnects.
2264 */
2265 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2266 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2267 pending_scb->hscb->cdb_len = 0;
2268 pending_scb->hscb->task_attribute = 0;
2269 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2270
2271 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2272 /*
2273 * Mark the SCB has having an outstanding
2274 * task management function. Should the command
2275 * complete normally before the task management
2276 * function can be sent, the host will be notified
2277 * to abort our requeued SCB.
2278 */
2279 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2280 pending_scb->hscb->task_management);
2281 } else {
2282 /*
2283 * If non-packetized, set the MK_MESSAGE control
2284 * bit indicating that we desire to send a message.
2285 * We also set the disconnected flag since there is
2286 * no guarantee that our SCB control byte matches
2287 * the version on the card. We don't want the
2288 * sequencer to abort the command thinking an
2289 * unsolicited reselection occurred.
2290 */
2291 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2292
2293 /*
2294 * The sequencer will never re-reference the
2295 * in-core SCB. To make sure we are notified
2296 * during reselection, set the MK_MESSAGE flag in
2297 * the card's copy of the SCB.
2298 */
2299 ahd_outb(ahd, SCB_CONTROL,
2300 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2301 }
2302
2303 /*
2304 * Clear out any entries in the QINFIFO first
2305 * so we are the next SCB for this target
2306 * to run.
2307 */
2308 ahd_search_qinfifo(ahd, cmd->device->id,
2309 cmd->device->channel + 'A', cmd->device->lun,
2310 SCB_LIST_NULL, ROLE_INITIATOR,
2311 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2312 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2313 ahd_set_scbptr(ahd, saved_scbptr);
2314 ahd_print_path(ahd, pending_scb);
2315 printk("Device is disconnected, re-queuing SCB\n");
2316 wait = TRUE;
2317 } else {
2318 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2319 retval = FAILED;
2320 }
2321
2322
2323 ahd_restore_modes(ahd, saved_modes);
2324 done:
2325 if (paused)
2326 ahd_unpause(ahd);
2327 if (wait) {
2328 DECLARE_COMPLETION_ONSTACK(done);
2329
2330 ahd->platform_data->eh_done = &done;
2331 ahd_unlock(ahd, &flags);
2332
2333 printk("%s: Recovery code sleeping\n", ahd_name(ahd));
2334 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2335 ahd_lock(ahd, &flags);
2336 ahd->platform_data->eh_done = NULL;
2337 ahd_unlock(ahd, &flags);
2338 printk("%s: Timer Expired (active %d)\n",
2339 ahd_name(ahd), dev->active);
2340 retval = FAILED;
2341 }
2342 printk("Recovery code awake\n");
2343 } else
2344 ahd_unlock(ahd, &flags);
2345
2346 if (retval != SUCCESS)
2347 printk("%s: Command abort returning 0x%x\n",
2348 ahd_name(ahd), retval);
2349
2350 return retval;
2351 }
2352
ahd_linux_set_width(struct scsi_target * starget,int width)2353 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2354 {
2355 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2356 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2357 struct ahd_devinfo devinfo;
2358 unsigned long flags;
2359
2360 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2361 starget->channel + 'A', ROLE_INITIATOR);
2362 ahd_lock(ahd, &flags);
2363 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2364 ahd_unlock(ahd, &flags);
2365 }
2366
ahd_linux_set_period(struct scsi_target * starget,int period)2367 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2368 {
2369 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2370 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2371 struct ahd_tmode_tstate *tstate;
2372 struct ahd_initiator_tinfo *tinfo
2373 = ahd_fetch_transinfo(ahd,
2374 starget->channel + 'A',
2375 shost->this_id, starget->id, &tstate);
2376 struct ahd_devinfo devinfo;
2377 unsigned int ppr_options = tinfo->goal.ppr_options;
2378 unsigned int dt;
2379 unsigned long flags;
2380 unsigned long offset = tinfo->goal.offset;
2381
2382 #ifdef AHD_DEBUG
2383 if ((ahd_debug & AHD_SHOW_DV) != 0)
2384 printk("%s: set period to %d\n", ahd_name(ahd), period);
2385 #endif
2386 if (offset == 0)
2387 offset = MAX_OFFSET;
2388
2389 if (period < 8)
2390 period = 8;
2391 if (period < 10) {
2392 if (spi_max_width(starget)) {
2393 ppr_options |= MSG_EXT_PPR_DT_REQ;
2394 if (period == 8)
2395 ppr_options |= MSG_EXT_PPR_IU_REQ;
2396 } else
2397 period = 10;
2398 }
2399
2400 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2401
2402 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2403 starget->channel + 'A', ROLE_INITIATOR);
2404
2405 /* all PPR requests apart from QAS require wide transfers */
2406 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2407 if (spi_width(starget) == 0)
2408 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2409 }
2410
2411 ahd_find_syncrate(ahd, &period, &ppr_options,
2412 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2413
2414 ahd_lock(ahd, &flags);
2415 ahd_set_syncrate(ahd, &devinfo, period, offset,
2416 ppr_options, AHD_TRANS_GOAL, FALSE);
2417 ahd_unlock(ahd, &flags);
2418 }
2419
ahd_linux_set_offset(struct scsi_target * starget,int offset)2420 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2421 {
2422 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2423 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2424 struct ahd_tmode_tstate *tstate;
2425 struct ahd_initiator_tinfo *tinfo
2426 = ahd_fetch_transinfo(ahd,
2427 starget->channel + 'A',
2428 shost->this_id, starget->id, &tstate);
2429 struct ahd_devinfo devinfo;
2430 unsigned int ppr_options = 0;
2431 unsigned int period = 0;
2432 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2433 unsigned long flags;
2434
2435 #ifdef AHD_DEBUG
2436 if ((ahd_debug & AHD_SHOW_DV) != 0)
2437 printk("%s: set offset to %d\n", ahd_name(ahd), offset);
2438 #endif
2439
2440 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2441 starget->channel + 'A', ROLE_INITIATOR);
2442 if (offset != 0) {
2443 period = tinfo->goal.period;
2444 ppr_options = tinfo->goal.ppr_options;
2445 ahd_find_syncrate(ahd, &period, &ppr_options,
2446 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2447 }
2448
2449 ahd_lock(ahd, &flags);
2450 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2451 AHD_TRANS_GOAL, FALSE);
2452 ahd_unlock(ahd, &flags);
2453 }
2454
ahd_linux_set_dt(struct scsi_target * starget,int dt)2455 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2456 {
2457 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2458 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2459 struct ahd_tmode_tstate *tstate;
2460 struct ahd_initiator_tinfo *tinfo
2461 = ahd_fetch_transinfo(ahd,
2462 starget->channel + 'A',
2463 shost->this_id, starget->id, &tstate);
2464 struct ahd_devinfo devinfo;
2465 unsigned int ppr_options = tinfo->goal.ppr_options
2466 & ~MSG_EXT_PPR_DT_REQ;
2467 unsigned int period = tinfo->goal.period;
2468 unsigned int width = tinfo->goal.width;
2469 unsigned long flags;
2470
2471 #ifdef AHD_DEBUG
2472 if ((ahd_debug & AHD_SHOW_DV) != 0)
2473 printk("%s: %s DT\n", ahd_name(ahd),
2474 dt ? "enabling" : "disabling");
2475 #endif
2476 if (dt && spi_max_width(starget)) {
2477 ppr_options |= MSG_EXT_PPR_DT_REQ;
2478 if (!width)
2479 ahd_linux_set_width(starget, 1);
2480 } else {
2481 if (period <= 9)
2482 period = 10; /* If resetting DT, period must be >= 25ns */
2483 /* IU is invalid without DT set */
2484 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2485 }
2486 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2487 starget->channel + 'A', ROLE_INITIATOR);
2488 ahd_find_syncrate(ahd, &period, &ppr_options,
2489 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2490
2491 ahd_lock(ahd, &flags);
2492 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2493 ppr_options, AHD_TRANS_GOAL, FALSE);
2494 ahd_unlock(ahd, &flags);
2495 }
2496
ahd_linux_set_qas(struct scsi_target * starget,int qas)2497 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2498 {
2499 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2500 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2501 struct ahd_tmode_tstate *tstate;
2502 struct ahd_initiator_tinfo *tinfo
2503 = ahd_fetch_transinfo(ahd,
2504 starget->channel + 'A',
2505 shost->this_id, starget->id, &tstate);
2506 struct ahd_devinfo devinfo;
2507 unsigned int ppr_options = tinfo->goal.ppr_options
2508 & ~MSG_EXT_PPR_QAS_REQ;
2509 unsigned int period = tinfo->goal.period;
2510 unsigned int dt;
2511 unsigned long flags;
2512
2513 #ifdef AHD_DEBUG
2514 if ((ahd_debug & AHD_SHOW_DV) != 0)
2515 printk("%s: %s QAS\n", ahd_name(ahd),
2516 qas ? "enabling" : "disabling");
2517 #endif
2518
2519 if (qas) {
2520 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2521 }
2522
2523 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2524
2525 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2526 starget->channel + 'A', ROLE_INITIATOR);
2527 ahd_find_syncrate(ahd, &period, &ppr_options,
2528 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2529
2530 ahd_lock(ahd, &flags);
2531 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2532 ppr_options, AHD_TRANS_GOAL, FALSE);
2533 ahd_unlock(ahd, &flags);
2534 }
2535
ahd_linux_set_iu(struct scsi_target * starget,int iu)2536 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2537 {
2538 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2539 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2540 struct ahd_tmode_tstate *tstate;
2541 struct ahd_initiator_tinfo *tinfo
2542 = ahd_fetch_transinfo(ahd,
2543 starget->channel + 'A',
2544 shost->this_id, starget->id, &tstate);
2545 struct ahd_devinfo devinfo;
2546 unsigned int ppr_options = tinfo->goal.ppr_options
2547 & ~MSG_EXT_PPR_IU_REQ;
2548 unsigned int period = tinfo->goal.period;
2549 unsigned int dt;
2550 unsigned long flags;
2551
2552 #ifdef AHD_DEBUG
2553 if ((ahd_debug & AHD_SHOW_DV) != 0)
2554 printk("%s: %s IU\n", ahd_name(ahd),
2555 iu ? "enabling" : "disabling");
2556 #endif
2557
2558 if (iu && spi_max_width(starget)) {
2559 ppr_options |= MSG_EXT_PPR_IU_REQ;
2560 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2561 }
2562
2563 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2564
2565 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2566 starget->channel + 'A', ROLE_INITIATOR);
2567 ahd_find_syncrate(ahd, &period, &ppr_options,
2568 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2569
2570 ahd_lock(ahd, &flags);
2571 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2572 ppr_options, AHD_TRANS_GOAL, FALSE);
2573 ahd_unlock(ahd, &flags);
2574 }
2575
ahd_linux_set_rd_strm(struct scsi_target * starget,int rdstrm)2576 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2577 {
2578 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2579 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2580 struct ahd_tmode_tstate *tstate;
2581 struct ahd_initiator_tinfo *tinfo
2582 = ahd_fetch_transinfo(ahd,
2583 starget->channel + 'A',
2584 shost->this_id, starget->id, &tstate);
2585 struct ahd_devinfo devinfo;
2586 unsigned int ppr_options = tinfo->goal.ppr_options
2587 & ~MSG_EXT_PPR_RD_STRM;
2588 unsigned int period = tinfo->goal.period;
2589 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2590 unsigned long flags;
2591
2592 #ifdef AHD_DEBUG
2593 if ((ahd_debug & AHD_SHOW_DV) != 0)
2594 printk("%s: %s Read Streaming\n", ahd_name(ahd),
2595 rdstrm ? "enabling" : "disabling");
2596 #endif
2597
2598 if (rdstrm && spi_max_width(starget))
2599 ppr_options |= MSG_EXT_PPR_RD_STRM;
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
ahd_linux_set_wr_flow(struct scsi_target * starget,int wrflow)2612 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
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_WR_FLOW;
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 Write Flow Control\n", ahd_name(ahd),
2631 wrflow ? "enabling" : "disabling");
2632 #endif
2633
2634 if (wrflow && spi_max_width(starget))
2635 ppr_options |= MSG_EXT_PPR_WR_FLOW;
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
ahd_linux_set_rti(struct scsi_target * starget,int rti)2648 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
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_RTI;
2660 unsigned int period = tinfo->goal.period;
2661 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2662 unsigned long flags;
2663
2664 if ((ahd->features & AHD_RTI) == 0) {
2665 #ifdef AHD_DEBUG
2666 if ((ahd_debug & AHD_SHOW_DV) != 0)
2667 printk("%s: RTI not available\n", ahd_name(ahd));
2668 #endif
2669 return;
2670 }
2671
2672 #ifdef AHD_DEBUG
2673 if ((ahd_debug & AHD_SHOW_DV) != 0)
2674 printk("%s: %s RTI\n", ahd_name(ahd),
2675 rti ? "enabling" : "disabling");
2676 #endif
2677
2678 if (rti && spi_max_width(starget))
2679 ppr_options |= MSG_EXT_PPR_RTI;
2680
2681 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2682 starget->channel + 'A', ROLE_INITIATOR);
2683 ahd_find_syncrate(ahd, &period, &ppr_options,
2684 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2685
2686 ahd_lock(ahd, &flags);
2687 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2688 ppr_options, AHD_TRANS_GOAL, FALSE);
2689 ahd_unlock(ahd, &flags);
2690 }
2691
ahd_linux_set_pcomp_en(struct scsi_target * starget,int pcomp)2692 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2693 {
2694 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2695 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2696 struct ahd_tmode_tstate *tstate;
2697 struct ahd_initiator_tinfo *tinfo
2698 = ahd_fetch_transinfo(ahd,
2699 starget->channel + 'A',
2700 shost->this_id, starget->id, &tstate);
2701 struct ahd_devinfo devinfo;
2702 unsigned int ppr_options = tinfo->goal.ppr_options
2703 & ~MSG_EXT_PPR_PCOMP_EN;
2704 unsigned int period = tinfo->goal.period;
2705 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2706 unsigned long flags;
2707
2708 #ifdef AHD_DEBUG
2709 if ((ahd_debug & AHD_SHOW_DV) != 0)
2710 printk("%s: %s Precompensation\n", ahd_name(ahd),
2711 pcomp ? "Enable" : "Disable");
2712 #endif
2713
2714 if (pcomp && spi_max_width(starget)) {
2715 uint8_t precomp;
2716
2717 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2718 const struct ahd_linux_iocell_opts *iocell_opts;
2719
2720 iocell_opts = &aic79xx_iocell_info[ahd->unit];
2721 precomp = iocell_opts->precomp;
2722 } else {
2723 precomp = AIC79XX_DEFAULT_PRECOMP;
2724 }
2725 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2726 AHD_SET_PRECOMP(ahd, precomp);
2727 } else {
2728 AHD_SET_PRECOMP(ahd, 0);
2729 }
2730
2731 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2732 starget->channel + 'A', ROLE_INITIATOR);
2733 ahd_find_syncrate(ahd, &period, &ppr_options,
2734 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2735
2736 ahd_lock(ahd, &flags);
2737 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2738 ppr_options, AHD_TRANS_GOAL, FALSE);
2739 ahd_unlock(ahd, &flags);
2740 }
2741
ahd_linux_set_hold_mcs(struct scsi_target * starget,int hold)2742 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2743 {
2744 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2745 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2746 struct ahd_tmode_tstate *tstate;
2747 struct ahd_initiator_tinfo *tinfo
2748 = ahd_fetch_transinfo(ahd,
2749 starget->channel + 'A',
2750 shost->this_id, starget->id, &tstate);
2751 struct ahd_devinfo devinfo;
2752 unsigned int ppr_options = tinfo->goal.ppr_options
2753 & ~MSG_EXT_PPR_HOLD_MCS;
2754 unsigned int period = tinfo->goal.period;
2755 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2756 unsigned long flags;
2757
2758 if (hold && spi_max_width(starget))
2759 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2760
2761 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2762 starget->channel + 'A', ROLE_INITIATOR);
2763 ahd_find_syncrate(ahd, &period, &ppr_options,
2764 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2765
2766 ahd_lock(ahd, &flags);
2767 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2768 ppr_options, AHD_TRANS_GOAL, FALSE);
2769 ahd_unlock(ahd, &flags);
2770 }
2771
ahd_linux_get_signalling(struct Scsi_Host * shost)2772 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2773 {
2774 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2775 unsigned long flags;
2776 u8 mode;
2777
2778 ahd_lock(ahd, &flags);
2779 ahd_pause(ahd);
2780 mode = ahd_inb(ahd, SBLKCTL);
2781 ahd_unpause(ahd);
2782 ahd_unlock(ahd, &flags);
2783
2784 if (mode & ENAB40)
2785 spi_signalling(shost) = SPI_SIGNAL_LVD;
2786 else if (mode & ENAB20)
2787 spi_signalling(shost) = SPI_SIGNAL_SE;
2788 else
2789 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2790 }
2791
2792 static struct spi_function_template ahd_linux_transport_functions = {
2793 .set_offset = ahd_linux_set_offset,
2794 .show_offset = 1,
2795 .set_period = ahd_linux_set_period,
2796 .show_period = 1,
2797 .set_width = ahd_linux_set_width,
2798 .show_width = 1,
2799 .set_dt = ahd_linux_set_dt,
2800 .show_dt = 1,
2801 .set_iu = ahd_linux_set_iu,
2802 .show_iu = 1,
2803 .set_qas = ahd_linux_set_qas,
2804 .show_qas = 1,
2805 .set_rd_strm = ahd_linux_set_rd_strm,
2806 .show_rd_strm = 1,
2807 .set_wr_flow = ahd_linux_set_wr_flow,
2808 .show_wr_flow = 1,
2809 .set_rti = ahd_linux_set_rti,
2810 .show_rti = 1,
2811 .set_pcomp_en = ahd_linux_set_pcomp_en,
2812 .show_pcomp_en = 1,
2813 .set_hold_mcs = ahd_linux_set_hold_mcs,
2814 .show_hold_mcs = 1,
2815 .get_signalling = ahd_linux_get_signalling,
2816 };
2817
2818 static int __init
ahd_linux_init(void)2819 ahd_linux_init(void)
2820 {
2821 int error = 0;
2822
2823 /*
2824 * If we've been passed any parameters, process them now.
2825 */
2826 if (aic79xx)
2827 aic79xx_setup(aic79xx);
2828
2829 ahd_linux_transport_template =
2830 spi_attach_transport(&ahd_linux_transport_functions);
2831 if (!ahd_linux_transport_template)
2832 return -ENODEV;
2833
2834 scsi_transport_reserve_device(ahd_linux_transport_template,
2835 sizeof(struct ahd_linux_device));
2836
2837 error = ahd_linux_pci_init();
2838 if (error)
2839 spi_release_transport(ahd_linux_transport_template);
2840 return error;
2841 }
2842
2843 static void __exit
ahd_linux_exit(void)2844 ahd_linux_exit(void)
2845 {
2846 ahd_linux_pci_exit();
2847 spi_release_transport(ahd_linux_transport_template);
2848 }
2849
2850 module_init(ahd_linux_init);
2851 module_exit(ahd_linux_exit);
2852