2 * Parallel SCSI (SPI) transport specific attributes exported to sysfs.
4 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
5 * Copyright (c) 2004, 2005 James Bottomley <James.Bottomley@SteelEye.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <linux/ctype.h>
22 #include <linux/init.h>
23 #include <linux/module.h>
24 #include <linux/workqueue.h>
25 #include <linux/blkdev.h>
26 #include <linux/mutex.h>
27 #include <linux/sysfs.h>
28 #include <linux/slab.h>
29 #include <scsi/scsi.h>
30 #include "scsi_priv.h"
31 #include <scsi/scsi_device.h>
32 #include <scsi/scsi_host.h>
33 #include <scsi/scsi_cmnd.h>
34 #include <scsi/scsi_eh.h>
35 #include <scsi/scsi_tcq.h>
36 #include <scsi/scsi_transport.h>
37 #include <scsi/scsi_transport_spi.h>
39 #define SPI_NUM_ATTRS 14 /* increase this if you add attributes */
40 #define SPI_OTHER_ATTRS 1 /* Increase this if you add "always
42 #define SPI_HOST_ATTRS 1
44 #define SPI_MAX_ECHO_BUFFER_SIZE 4096
47 #define DV_TIMEOUT (10*HZ)
48 #define DV_RETRIES 3 /* should only need at most
51 /* Our blacklist flags */
53 SPI_BLIST_NOIUS
= (__force blist_flags_t
)0x1,
56 /* blacklist table, modelled on scsi_devinfo.c */
61 } spi_static_device_list
[] __initdata
= {
62 {"HP", "Ultrium 3-SCSI", SPI_BLIST_NOIUS
},
63 {"IBM", "ULTRIUM-TD3", SPI_BLIST_NOIUS
},
67 /* Private data accessors (keep these out of the header file) */
68 #define spi_dv_in_progress(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_in_progress)
69 #define spi_dv_mutex(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_mutex)
72 struct scsi_transport_template t
;
73 struct spi_function_template
*f
;
76 #define to_spi_internal(tmpl) container_of(tmpl, struct spi_internal, t)
78 static const int ppr_to_ps
[] = {
79 /* The PPR values 0-6 are reserved, fill them in when
80 * the committee defines them */
95 /* The PPR values at which you calculate the period in ns by multiplying
97 #define SPI_STATIC_PPR 0x0c
99 static int sprint_frac(char *dest
, int value
, int denom
)
101 int frac
= value
% denom
;
102 int result
= sprintf(dest
, "%d", value
/ denom
);
106 dest
[result
++] = '.';
110 sprintf(dest
+ result
, "%d", frac
/ denom
);
115 dest
[result
++] = '\0';
119 static int spi_execute(struct scsi_device
*sdev
, const void *cmd
,
120 enum dma_data_direction dir
,
121 void *buffer
, unsigned bufflen
,
122 struct scsi_sense_hdr
*sshdr
)
125 unsigned char sense
[SCSI_SENSE_BUFFERSIZE
];
126 struct scsi_sense_hdr sshdr_tmp
;
131 for(i
= 0; i
< DV_RETRIES
; i
++) {
132 result
= scsi_execute(sdev
, cmd
, dir
, buffer
, bufflen
, sense
,
133 sshdr
, DV_TIMEOUT
, /* retries */ 1,
135 REQ_FAILFAST_TRANSPORT
|
138 if (!(driver_byte(result
) & DRIVER_SENSE
) ||
139 sshdr
->sense_key
!= UNIT_ATTENTION
)
146 enum spi_signal_type value
;
149 { SPI_SIGNAL_UNKNOWN
, "unknown" },
150 { SPI_SIGNAL_SE
, "SE" },
151 { SPI_SIGNAL_LVD
, "LVD" },
152 { SPI_SIGNAL_HVD
, "HVD" },
155 static inline const char *spi_signal_to_string(enum spi_signal_type type
)
159 for (i
= 0; i
< ARRAY_SIZE(signal_types
); i
++) {
160 if (type
== signal_types
[i
].value
)
161 return signal_types
[i
].name
;
165 static inline enum spi_signal_type
spi_signal_to_value(const char *name
)
169 for (i
= 0; i
< ARRAY_SIZE(signal_types
); i
++) {
170 len
= strlen(signal_types
[i
].name
);
171 if (strncmp(name
, signal_types
[i
].name
, len
) == 0 &&
172 (name
[len
] == '\n' || name
[len
] == '\0'))
173 return signal_types
[i
].value
;
175 return SPI_SIGNAL_UNKNOWN
;
178 static int spi_host_setup(struct transport_container
*tc
, struct device
*dev
,
181 struct Scsi_Host
*shost
= dev_to_shost(dev
);
183 spi_signalling(shost
) = SPI_SIGNAL_UNKNOWN
;
188 static int spi_host_configure(struct transport_container
*tc
,
190 struct device
*cdev
);
192 static DECLARE_TRANSPORT_CLASS(spi_host_class
,
198 static int spi_host_match(struct attribute_container
*cont
,
201 struct Scsi_Host
*shost
;
203 if (!scsi_is_host_device(dev
))
206 shost
= dev_to_shost(dev
);
207 if (!shost
->transportt
|| shost
->transportt
->host_attrs
.ac
.class
208 != &spi_host_class
.class)
211 return &shost
->transportt
->host_attrs
.ac
== cont
;
214 static int spi_target_configure(struct transport_container
*tc
,
216 struct device
*cdev
);
218 static int spi_device_configure(struct transport_container
*tc
,
222 struct scsi_device
*sdev
= to_scsi_device(dev
);
223 struct scsi_target
*starget
= sdev
->sdev_target
;
224 blist_flags_t bflags
;
226 bflags
= scsi_get_device_flags_keyed(sdev
, &sdev
->inquiry
[8],
230 /* Populate the target capability fields with the values
231 * gleaned from the device inquiry */
233 spi_support_sync(starget
) = scsi_device_sync(sdev
);
234 spi_support_wide(starget
) = scsi_device_wide(sdev
);
235 spi_support_dt(starget
) = scsi_device_dt(sdev
);
236 spi_support_dt_only(starget
) = scsi_device_dt_only(sdev
);
237 spi_support_ius(starget
) = scsi_device_ius(sdev
);
238 if (bflags
& SPI_BLIST_NOIUS
) {
239 dev_info(dev
, "Information Units disabled by blacklist\n");
240 spi_support_ius(starget
) = 0;
242 spi_support_qas(starget
) = scsi_device_qas(sdev
);
247 static int spi_setup_transport_attrs(struct transport_container
*tc
,
251 struct scsi_target
*starget
= to_scsi_target(dev
);
253 spi_period(starget
) = -1; /* illegal value */
254 spi_min_period(starget
) = 0;
255 spi_offset(starget
) = 0; /* async */
256 spi_max_offset(starget
) = 255;
257 spi_width(starget
) = 0; /* narrow */
258 spi_max_width(starget
) = 1;
259 spi_iu(starget
) = 0; /* no IU */
260 spi_max_iu(starget
) = 1;
261 spi_dt(starget
) = 0; /* ST */
262 spi_qas(starget
) = 0;
263 spi_max_qas(starget
) = 1;
264 spi_wr_flow(starget
) = 0;
265 spi_rd_strm(starget
) = 0;
266 spi_rti(starget
) = 0;
267 spi_pcomp_en(starget
) = 0;
268 spi_hold_mcs(starget
) = 0;
269 spi_dv_pending(starget
) = 0;
270 spi_dv_in_progress(starget
) = 0;
271 spi_initial_dv(starget
) = 0;
272 mutex_init(&spi_dv_mutex(starget
));
277 #define spi_transport_show_simple(field, format_string) \
280 show_spi_transport_##field(struct device *dev, \
281 struct device_attribute *attr, char *buf) \
283 struct scsi_target *starget = transport_class_to_starget(dev); \
284 struct spi_transport_attrs *tp; \
286 tp = (struct spi_transport_attrs *)&starget->starget_data; \
287 return snprintf(buf, 20, format_string, tp->field); \
290 #define spi_transport_store_simple(field, format_string) \
293 store_spi_transport_##field(struct device *dev, \
294 struct device_attribute *attr, \
295 const char *buf, size_t count) \
298 struct scsi_target *starget = transport_class_to_starget(dev); \
299 struct spi_transport_attrs *tp; \
301 tp = (struct spi_transport_attrs *)&starget->starget_data; \
302 val = simple_strtoul(buf, NULL, 0); \
307 #define spi_transport_show_function(field, format_string) \
310 show_spi_transport_##field(struct device *dev, \
311 struct device_attribute *attr, char *buf) \
313 struct scsi_target *starget = transport_class_to_starget(dev); \
314 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
315 struct spi_transport_attrs *tp; \
316 struct spi_internal *i = to_spi_internal(shost->transportt); \
317 tp = (struct spi_transport_attrs *)&starget->starget_data; \
318 if (i->f->get_##field) \
319 i->f->get_##field(starget); \
320 return snprintf(buf, 20, format_string, tp->field); \
323 #define spi_transport_store_function(field, format_string) \
325 store_spi_transport_##field(struct device *dev, \
326 struct device_attribute *attr, \
327 const char *buf, size_t count) \
330 struct scsi_target *starget = transport_class_to_starget(dev); \
331 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
332 struct spi_internal *i = to_spi_internal(shost->transportt); \
334 if (!i->f->set_##field) \
336 val = simple_strtoul(buf, NULL, 0); \
337 i->f->set_##field(starget, val); \
341 #define spi_transport_store_max(field, format_string) \
343 store_spi_transport_##field(struct device *dev, \
344 struct device_attribute *attr, \
345 const char *buf, size_t count) \
348 struct scsi_target *starget = transport_class_to_starget(dev); \
349 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
350 struct spi_internal *i = to_spi_internal(shost->transportt); \
351 struct spi_transport_attrs *tp \
352 = (struct spi_transport_attrs *)&starget->starget_data; \
354 if (i->f->set_##field) \
356 val = simple_strtoul(buf, NULL, 0); \
357 if (val > tp->max_##field) \
358 val = tp->max_##field; \
359 i->f->set_##field(starget, val); \
363 #define spi_transport_rd_attr(field, format_string) \
364 spi_transport_show_function(field, format_string) \
365 spi_transport_store_function(field, format_string) \
366 static DEVICE_ATTR(field, S_IRUGO, \
367 show_spi_transport_##field, \
368 store_spi_transport_##field);
370 #define spi_transport_simple_attr(field, format_string) \
371 spi_transport_show_simple(field, format_string) \
372 spi_transport_store_simple(field, format_string) \
373 static DEVICE_ATTR(field, S_IRUGO, \
374 show_spi_transport_##field, \
375 store_spi_transport_##field);
377 #define spi_transport_max_attr(field, format_string) \
378 spi_transport_show_function(field, format_string) \
379 spi_transport_store_max(field, format_string) \
380 spi_transport_simple_attr(max_##field, format_string) \
381 static DEVICE_ATTR(field, S_IRUGO, \
382 show_spi_transport_##field, \
383 store_spi_transport_##field);
385 /* The Parallel SCSI Tranport Attributes: */
386 spi_transport_max_attr(offset
, "%d\n");
387 spi_transport_max_attr(width
, "%d\n");
388 spi_transport_max_attr(iu
, "%d\n");
389 spi_transport_rd_attr(dt
, "%d\n");
390 spi_transport_max_attr(qas
, "%d\n");
391 spi_transport_rd_attr(wr_flow
, "%d\n");
392 spi_transport_rd_attr(rd_strm
, "%d\n");
393 spi_transport_rd_attr(rti
, "%d\n");
394 spi_transport_rd_attr(pcomp_en
, "%d\n");
395 spi_transport_rd_attr(hold_mcs
, "%d\n");
397 /* we only care about the first child device that's a real SCSI device
398 * so we return 1 to terminate the iteration when we find it */
399 static int child_iter(struct device
*dev
, void *data
)
401 if (!scsi_is_sdev_device(dev
))
404 spi_dv_device(to_scsi_device(dev
));
409 store_spi_revalidate(struct device
*dev
, struct device_attribute
*attr
,
410 const char *buf
, size_t count
)
412 struct scsi_target
*starget
= transport_class_to_starget(dev
);
414 device_for_each_child(&starget
->dev
, NULL
, child_iter
);
417 static DEVICE_ATTR(revalidate
, S_IWUSR
, NULL
, store_spi_revalidate
);
419 /* Translate the period into ns according to the current spec
420 * for SDTR/PPR messages */
421 static int period_to_str(char *buf
, int period
)
425 if (period
< 0 || period
> 0xff) {
427 } else if (period
<= SPI_STATIC_PPR
) {
428 picosec
= ppr_to_ps
[period
];
430 picosec
= period
* 4000;
434 len
= sprintf(buf
, "reserved");
436 len
= sprint_frac(buf
, picosec
, 1000);
443 show_spi_transport_period_helper(char *buf
, int period
)
445 int len
= period_to_str(buf
, period
);
452 store_spi_transport_period_helper(struct device
*dev
, const char *buf
,
453 size_t count
, int *periodp
)
455 int j
, picosec
, period
= -1;
458 picosec
= simple_strtoul(buf
, &endp
, 10) * 1000;
465 picosec
+= (*endp
- '0') * mult
;
470 for (j
= 0; j
<= SPI_STATIC_PPR
; j
++) {
471 if (ppr_to_ps
[j
] < picosec
)
478 period
= picosec
/ 4000;
489 show_spi_transport_period(struct device
*dev
,
490 struct device_attribute
*attr
, char *buf
)
492 struct scsi_target
*starget
= transport_class_to_starget(dev
);
493 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
494 struct spi_internal
*i
= to_spi_internal(shost
->transportt
);
495 struct spi_transport_attrs
*tp
=
496 (struct spi_transport_attrs
*)&starget
->starget_data
;
498 if (i
->f
->get_period
)
499 i
->f
->get_period(starget
);
501 return show_spi_transport_period_helper(buf
, tp
->period
);
505 store_spi_transport_period(struct device
*cdev
, struct device_attribute
*attr
,
506 const char *buf
, size_t count
)
508 struct scsi_target
*starget
= transport_class_to_starget(cdev
);
509 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
510 struct spi_internal
*i
= to_spi_internal(shost
->transportt
);
511 struct spi_transport_attrs
*tp
=
512 (struct spi_transport_attrs
*)&starget
->starget_data
;
515 if (!i
->f
->set_period
)
518 retval
= store_spi_transport_period_helper(cdev
, buf
, count
, &period
);
520 if (period
< tp
->min_period
)
521 period
= tp
->min_period
;
523 i
->f
->set_period(starget
, period
);
528 static DEVICE_ATTR(period
, S_IRUGO
,
529 show_spi_transport_period
,
530 store_spi_transport_period
);
533 show_spi_transport_min_period(struct device
*cdev
,
534 struct device_attribute
*attr
, char *buf
)
536 struct scsi_target
*starget
= transport_class_to_starget(cdev
);
537 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
538 struct spi_internal
*i
= to_spi_internal(shost
->transportt
);
539 struct spi_transport_attrs
*tp
=
540 (struct spi_transport_attrs
*)&starget
->starget_data
;
542 if (!i
->f
->set_period
)
545 return show_spi_transport_period_helper(buf
, tp
->min_period
);
549 store_spi_transport_min_period(struct device
*cdev
,
550 struct device_attribute
*attr
,
551 const char *buf
, size_t count
)
553 struct scsi_target
*starget
= transport_class_to_starget(cdev
);
554 struct spi_transport_attrs
*tp
=
555 (struct spi_transport_attrs
*)&starget
->starget_data
;
557 return store_spi_transport_period_helper(cdev
, buf
, count
,
562 static DEVICE_ATTR(min_period
, S_IRUGO
,
563 show_spi_transport_min_period
,
564 store_spi_transport_min_period
);
567 static ssize_t
show_spi_host_signalling(struct device
*cdev
,
568 struct device_attribute
*attr
,
571 struct Scsi_Host
*shost
= transport_class_to_shost(cdev
);
572 struct spi_internal
*i
= to_spi_internal(shost
->transportt
);
574 if (i
->f
->get_signalling
)
575 i
->f
->get_signalling(shost
);
577 return sprintf(buf
, "%s\n", spi_signal_to_string(spi_signalling(shost
)));
579 static ssize_t
store_spi_host_signalling(struct device
*dev
,
580 struct device_attribute
*attr
,
581 const char *buf
, size_t count
)
583 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
584 struct spi_internal
*i
= to_spi_internal(shost
->transportt
);
585 enum spi_signal_type type
= spi_signal_to_value(buf
);
587 if (!i
->f
->set_signalling
)
590 if (type
!= SPI_SIGNAL_UNKNOWN
)
591 i
->f
->set_signalling(shost
, type
);
595 static DEVICE_ATTR(signalling
, S_IRUGO
,
596 show_spi_host_signalling
,
597 store_spi_host_signalling
);
599 static ssize_t
show_spi_host_width(struct device
*cdev
,
600 struct device_attribute
*attr
,
603 struct Scsi_Host
*shost
= transport_class_to_shost(cdev
);
605 return sprintf(buf
, "%s\n", shost
->max_id
== 16 ? "wide" : "narrow");
607 static DEVICE_ATTR(host_width
, S_IRUGO
,
608 show_spi_host_width
, NULL
);
610 static ssize_t
show_spi_host_hba_id(struct device
*cdev
,
611 struct device_attribute
*attr
,
614 struct Scsi_Host
*shost
= transport_class_to_shost(cdev
);
616 return sprintf(buf
, "%d\n", shost
->this_id
);
618 static DEVICE_ATTR(hba_id
, S_IRUGO
,
619 show_spi_host_hba_id
, NULL
);
621 #define DV_SET(x, y) \
623 i->f->set_##x(sdev->sdev_target, y)
625 enum spi_compare_returns
{
628 SPI_COMPARE_SKIP_TEST
,
632 /* This is for read/write Domain Validation: If the device supports
633 * an echo buffer, we do read/write tests to it */
634 static enum spi_compare_returns
635 spi_dv_device_echo_buffer(struct scsi_device
*sdev
, u8
*buffer
,
636 u8
*ptr
, const int retries
)
638 int len
= ptr
- buffer
;
640 unsigned int pattern
= 0x0000ffff;
641 struct scsi_sense_hdr sshdr
;
643 const char spi_write_buffer
[] = {
644 WRITE_BUFFER
, 0x0a, 0, 0, 0, 0, 0, len
>> 8, len
& 0xff, 0
646 const char spi_read_buffer
[] = {
647 READ_BUFFER
, 0x0a, 0, 0, 0, 0, 0, len
>> 8, len
& 0xff, 0
650 /* set up the pattern buffer. Doesn't matter if we spill
651 * slightly beyond since that's where the read buffer is */
652 for (j
= 0; j
< len
; ) {
654 /* fill the buffer with counting (test a) */
655 for ( ; j
< min(len
, 32); j
++)
658 /* fill the buffer with alternating words of 0x0 and
660 for ( ; j
< min(len
, k
+ 32); j
+= 2) {
661 u16
*word
= (u16
*)&buffer
[j
];
663 *word
= (j
& 0x02) ? 0x0000 : 0xffff;
666 /* fill with crosstalk (alternating 0x5555 0xaaa)
668 for ( ; j
< min(len
, k
+ 32); j
+= 2) {
669 u16
*word
= (u16
*)&buffer
[j
];
671 *word
= (j
& 0x02) ? 0x5555 : 0xaaaa;
674 /* fill with shifting bits (test d) */
675 for ( ; j
< min(len
, k
+ 32); j
+= 4) {
676 u32
*word
= (unsigned int *)&buffer
[j
];
677 u32 roll
= (pattern
& 0x80000000) ? 1 : 0;
680 pattern
= (pattern
<< 1) | roll
;
682 /* don't bother with random data (test e) */
685 for (r
= 0; r
< retries
; r
++) {
686 result
= spi_execute(sdev
, spi_write_buffer
, DMA_TO_DEVICE
,
687 buffer
, len
, &sshdr
);
688 if(result
|| !scsi_device_online(sdev
)) {
690 scsi_device_set_state(sdev
, SDEV_QUIESCE
);
691 if (scsi_sense_valid(&sshdr
)
692 && sshdr
.sense_key
== ILLEGAL_REQUEST
693 /* INVALID FIELD IN CDB */
694 && sshdr
.asc
== 0x24 && sshdr
.ascq
== 0x00)
695 /* This would mean that the drive lied
696 * to us about supporting an echo
697 * buffer (unfortunately some Western
698 * Digital drives do precisely this)
700 return SPI_COMPARE_SKIP_TEST
;
703 sdev_printk(KERN_ERR
, sdev
, "Write Buffer failure %x\n", result
);
704 return SPI_COMPARE_FAILURE
;
708 spi_execute(sdev
, spi_read_buffer
, DMA_FROM_DEVICE
,
710 scsi_device_set_state(sdev
, SDEV_QUIESCE
);
712 if (memcmp(buffer
, ptr
, len
) != 0)
713 return SPI_COMPARE_FAILURE
;
715 return SPI_COMPARE_SUCCESS
;
718 /* This is for the simplest form of Domain Validation: a read test
719 * on the inquiry data from the device */
720 static enum spi_compare_returns
721 spi_dv_device_compare_inquiry(struct scsi_device
*sdev
, u8
*buffer
,
722 u8
*ptr
, const int retries
)
725 const int len
= sdev
->inquiry_len
;
726 const char spi_inquiry
[] = {
727 INQUIRY
, 0, 0, 0, len
, 0
730 for (r
= 0; r
< retries
; r
++) {
733 result
= spi_execute(sdev
, spi_inquiry
, DMA_FROM_DEVICE
,
736 if(result
|| !scsi_device_online(sdev
)) {
737 scsi_device_set_state(sdev
, SDEV_QUIESCE
);
738 return SPI_COMPARE_FAILURE
;
741 /* If we don't have the inquiry data already, the
742 * first read gets it */
749 if (memcmp(buffer
, ptr
, len
) != 0)
751 return SPI_COMPARE_FAILURE
;
753 return SPI_COMPARE_SUCCESS
;
756 static enum spi_compare_returns
757 spi_dv_retrain(struct scsi_device
*sdev
, u8
*buffer
, u8
*ptr
,
758 enum spi_compare_returns
759 (*compare_fn
)(struct scsi_device
*, u8
*, u8
*, int))
761 struct spi_internal
*i
= to_spi_internal(sdev
->host
->transportt
);
762 struct scsi_target
*starget
= sdev
->sdev_target
;
763 int period
= 0, prevperiod
= 0;
764 enum spi_compare_returns retval
;
769 retval
= compare_fn(sdev
, buffer
, ptr
, DV_LOOPS
);
771 if (retval
== SPI_COMPARE_SUCCESS
772 || retval
== SPI_COMPARE_SKIP_TEST
)
775 /* OK, retrain, fallback */
777 i
->f
->get_iu(starget
);
779 i
->f
->get_qas(starget
);
780 if (i
->f
->get_period
)
781 i
->f
->get_period(sdev
->sdev_target
);
783 /* Here's the fallback sequence; first try turning off
784 * IU, then QAS (if we can control them), then finally
785 * fall down the periods */
786 if (i
->f
->set_iu
&& spi_iu(starget
)) {
787 starget_printk(KERN_ERR
, starget
, "Domain Validation Disabling Information Units\n");
789 } else if (i
->f
->set_qas
&& spi_qas(starget
)) {
790 starget_printk(KERN_ERR
, starget
, "Domain Validation Disabling Quick Arbitration and Selection\n");
793 newperiod
= spi_period(starget
);
794 period
= newperiod
> period
? newperiod
: period
;
798 period
+= period
>> 1;
800 if (unlikely(period
> 0xff || period
== prevperiod
)) {
801 /* Total failure; set to async and return */
802 starget_printk(KERN_ERR
, starget
, "Domain Validation Failure, dropping back to Asynchronous\n");
804 return SPI_COMPARE_FAILURE
;
806 starget_printk(KERN_ERR
, starget
, "Domain Validation detected failure, dropping back\n");
807 DV_SET(period
, period
);
815 spi_dv_device_get_echo_buffer(struct scsi_device
*sdev
, u8
*buffer
)
819 /* first off do a test unit ready. This can error out
820 * because of reservations or some other reason. If it
821 * fails, the device won't let us write to the echo buffer
822 * so just return failure */
824 const char spi_test_unit_ready
[] = {
825 TEST_UNIT_READY
, 0, 0, 0, 0, 0
828 const char spi_read_buffer_descriptor
[] = {
829 READ_BUFFER
, 0x0b, 0, 0, 0, 0, 0, 0, 4, 0
833 /* We send a set of three TURs to clear any outstanding
834 * unit attention conditions if they exist (Otherwise the
835 * buffer tests won't be happy). If the TUR still fails
836 * (reservation conflict, device not ready, etc) just
837 * skip the write tests */
839 result
= spi_execute(sdev
, spi_test_unit_ready
, DMA_NONE
,
851 result
= spi_execute(sdev
, spi_read_buffer_descriptor
,
852 DMA_FROM_DEVICE
, buffer
, 4, NULL
);
855 /* Device has no echo buffer */
858 return buffer
[3] + ((buffer
[2] & 0x1f) << 8);
862 spi_dv_device_internal(struct scsi_device
*sdev
, u8
*buffer
)
864 struct spi_internal
*i
= to_spi_internal(sdev
->host
->transportt
);
865 struct scsi_target
*starget
= sdev
->sdev_target
;
866 struct Scsi_Host
*shost
= sdev
->host
;
867 int len
= sdev
->inquiry_len
;
868 int min_period
= spi_min_period(starget
);
869 int max_width
= spi_max_width(starget
);
870 /* first set us up for narrow async */
874 if (spi_dv_device_compare_inquiry(sdev
, buffer
, buffer
, DV_LOOPS
)
875 != SPI_COMPARE_SUCCESS
) {
876 starget_printk(KERN_ERR
, starget
, "Domain Validation Initial Inquiry Failed\n");
877 /* FIXME: should probably offline the device here? */
881 if (!spi_support_wide(starget
)) {
882 spi_max_width(starget
) = 0;
887 if (i
->f
->set_width
&& max_width
) {
888 i
->f
->set_width(starget
, 1);
890 if (spi_dv_device_compare_inquiry(sdev
, buffer
,
893 != SPI_COMPARE_SUCCESS
) {
894 starget_printk(KERN_ERR
, starget
, "Wide Transfers Fail\n");
895 i
->f
->set_width(starget
, 0);
896 /* Make sure we don't force wide back on by asking
897 * for a transfer period that requires it */
904 if (!i
->f
->set_period
)
907 /* device can't handle synchronous */
908 if (!spi_support_sync(starget
) && !spi_support_dt(starget
))
911 /* len == -1 is the signal that we need to ascertain the
912 * presence of an echo buffer before trying to use it. len ==
913 * 0 means we don't have an echo buffer */
918 /* now set up to the maximum */
919 DV_SET(offset
, spi_max_offset(starget
));
920 DV_SET(period
, min_period
);
922 /* try QAS requests; this should be harmless to set if the
923 * target supports it */
924 if (spi_support_qas(starget
) && spi_max_qas(starget
)) {
930 if (spi_support_ius(starget
) && spi_max_iu(starget
) &&
932 /* This u320 (or u640). Set IU transfers */
934 /* Then set the optional parameters */
944 /* now that we've done all this, actually check the bus
945 * signal type (if known). Some devices are stupid on
946 * a SE bus and still claim they can try LVD only settings */
947 if (i
->f
->get_signalling
)
948 i
->f
->get_signalling(shost
);
949 if (spi_signalling(shost
) == SPI_SIGNAL_SE
||
950 spi_signalling(shost
) == SPI_SIGNAL_HVD
||
951 !spi_support_dt(starget
)) {
956 /* set width last because it will pull all the other
957 * parameters down to required values */
958 DV_SET(width
, max_width
);
960 /* Do the read only INQUIRY tests */
961 spi_dv_retrain(sdev
, buffer
, buffer
+ sdev
->inquiry_len
,
962 spi_dv_device_compare_inquiry
);
963 /* See if we actually managed to negotiate and sustain DT */
965 i
->f
->get_dt(starget
);
967 /* see if the device has an echo buffer. If it does we can do
968 * the SPI pattern write tests. Because of some broken
969 * devices, we *only* try this on a device that has actually
972 if (len
== -1 && spi_dt(starget
))
973 len
= spi_dv_device_get_echo_buffer(sdev
, buffer
);
976 starget_printk(KERN_INFO
, starget
, "Domain Validation skipping write tests\n");
980 if (len
> SPI_MAX_ECHO_BUFFER_SIZE
) {
981 starget_printk(KERN_WARNING
, starget
, "Echo buffer size %d is too big, trimming to %d\n", len
, SPI_MAX_ECHO_BUFFER_SIZE
);
982 len
= SPI_MAX_ECHO_BUFFER_SIZE
;
985 if (spi_dv_retrain(sdev
, buffer
, buffer
+ len
,
986 spi_dv_device_echo_buffer
)
987 == SPI_COMPARE_SKIP_TEST
) {
988 /* OK, the stupid drive can't do a write echo buffer
989 * test after all, fall back to the read tests */
996 /** spi_dv_device - Do Domain Validation on the device
997 * @sdev: scsi device to validate
999 * Performs the domain validation on the given device in the
1000 * current execution thread. Since DV operations may sleep,
1001 * the current thread must have user context. Also no SCSI
1002 * related locks that would deadlock I/O issued by the DV may
1006 spi_dv_device(struct scsi_device
*sdev
)
1008 struct scsi_target
*starget
= sdev
->sdev_target
;
1010 const int len
= SPI_MAX_ECHO_BUFFER_SIZE
*2;
1012 if (unlikely(spi_dv_in_progress(starget
)))
1015 if (unlikely(scsi_device_get(sdev
)))
1017 spi_dv_in_progress(starget
) = 1;
1019 buffer
= kzalloc(len
, GFP_KERNEL
);
1021 if (unlikely(!buffer
))
1024 /* We need to verify that the actual device will quiesce; the
1025 * later target quiesce is just a nice to have */
1026 if (unlikely(scsi_device_quiesce(sdev
)))
1029 scsi_target_quiesce(starget
);
1031 spi_dv_pending(starget
) = 1;
1032 mutex_lock(&spi_dv_mutex(starget
));
1034 starget_printk(KERN_INFO
, starget
, "Beginning Domain Validation\n");
1036 spi_dv_device_internal(sdev
, buffer
);
1038 starget_printk(KERN_INFO
, starget
, "Ending Domain Validation\n");
1040 mutex_unlock(&spi_dv_mutex(starget
));
1041 spi_dv_pending(starget
) = 0;
1043 scsi_target_resume(starget
);
1045 spi_initial_dv(starget
) = 1;
1050 spi_dv_in_progress(starget
) = 0;
1051 scsi_device_put(sdev
);
1053 EXPORT_SYMBOL(spi_dv_device
);
1055 struct work_queue_wrapper
{
1056 struct work_struct work
;
1057 struct scsi_device
*sdev
;
1061 spi_dv_device_work_wrapper(struct work_struct
*work
)
1063 struct work_queue_wrapper
*wqw
=
1064 container_of(work
, struct work_queue_wrapper
, work
);
1065 struct scsi_device
*sdev
= wqw
->sdev
;
1068 spi_dv_device(sdev
);
1069 spi_dv_pending(sdev
->sdev_target
) = 0;
1070 scsi_device_put(sdev
);
1075 * spi_schedule_dv_device - schedule domain validation to occur on the device
1076 * @sdev: The device to validate
1078 * Identical to spi_dv_device() above, except that the DV will be
1079 * scheduled to occur in a workqueue later. All memory allocations
1080 * are atomic, so may be called from any context including those holding
1084 spi_schedule_dv_device(struct scsi_device
*sdev
)
1086 struct work_queue_wrapper
*wqw
=
1087 kmalloc(sizeof(struct work_queue_wrapper
), GFP_ATOMIC
);
1092 if (unlikely(spi_dv_pending(sdev
->sdev_target
))) {
1096 /* Set pending early (dv_device doesn't check it, only sets it) */
1097 spi_dv_pending(sdev
->sdev_target
) = 1;
1098 if (unlikely(scsi_device_get(sdev
))) {
1100 spi_dv_pending(sdev
->sdev_target
) = 0;
1104 INIT_WORK(&wqw
->work
, spi_dv_device_work_wrapper
);
1107 schedule_work(&wqw
->work
);
1109 EXPORT_SYMBOL(spi_schedule_dv_device
);
1112 * spi_display_xfer_agreement - Print the current target transfer agreement
1113 * @starget: The target for which to display the agreement
1115 * Each SPI port is required to maintain a transfer agreement for each
1116 * other port on the bus. This function prints a one-line summary of
1117 * the current agreement; more detailed information is available in sysfs.
1119 void spi_display_xfer_agreement(struct scsi_target
*starget
)
1121 struct spi_transport_attrs
*tp
;
1122 tp
= (struct spi_transport_attrs
*)&starget
->starget_data
;
1124 if (tp
->offset
> 0 && tp
->period
> 0) {
1125 unsigned int picosec
, kb100
;
1126 char *scsi
= "FAST-?";
1129 if (tp
->period
<= SPI_STATIC_PPR
) {
1130 picosec
= ppr_to_ps
[tp
->period
];
1131 switch (tp
->period
) {
1132 case 7: scsi
= "FAST-320"; break;
1133 case 8: scsi
= "FAST-160"; break;
1134 case 9: scsi
= "FAST-80"; break;
1136 case 11: scsi
= "FAST-40"; break;
1137 case 12: scsi
= "FAST-20"; break;
1140 picosec
= tp
->period
* 4000;
1141 if (tp
->period
< 25)
1143 else if (tp
->period
< 50)
1149 kb100
= (10000000 + picosec
/ 2) / picosec
;
1152 sprint_frac(tmp
, picosec
, 1000);
1154 dev_info(&starget
->dev
,
1155 "%s %sSCSI %d.%d MB/s %s%s%s%s%s%s%s%s (%s ns, offset %d)\n",
1156 scsi
, tp
->width
? "WIDE " : "", kb100
/10, kb100
% 10,
1157 tp
->dt
? "DT" : "ST",
1158 tp
->iu
? " IU" : "",
1159 tp
->qas
? " QAS" : "",
1160 tp
->rd_strm
? " RDSTRM" : "",
1161 tp
->rti
? " RTI" : "",
1162 tp
->wr_flow
? " WRFLOW" : "",
1163 tp
->pcomp_en
? " PCOMP" : "",
1164 tp
->hold_mcs
? " HMCS" : "",
1167 dev_info(&starget
->dev
, "%sasynchronous\n",
1168 tp
->width
? "wide " : "");
1171 EXPORT_SYMBOL(spi_display_xfer_agreement
);
1173 int spi_populate_width_msg(unsigned char *msg
, int width
)
1175 msg
[0] = EXTENDED_MESSAGE
;
1177 msg
[2] = EXTENDED_WDTR
;
1181 EXPORT_SYMBOL_GPL(spi_populate_width_msg
);
1183 int spi_populate_sync_msg(unsigned char *msg
, int period
, int offset
)
1185 msg
[0] = EXTENDED_MESSAGE
;
1187 msg
[2] = EXTENDED_SDTR
;
1192 EXPORT_SYMBOL_GPL(spi_populate_sync_msg
);
1194 int spi_populate_ppr_msg(unsigned char *msg
, int period
, int offset
,
1195 int width
, int options
)
1197 msg
[0] = EXTENDED_MESSAGE
;
1199 msg
[2] = EXTENDED_PPR
;
1207 EXPORT_SYMBOL_GPL(spi_populate_ppr_msg
);
1210 * spi_populate_tag_msg - place a tag message in a buffer
1211 * @msg: pointer to the area to place the tag
1212 * @cmd: pointer to the scsi command for the tag
1215 * designed to create the correct type of tag message for the
1216 * particular request. Returns the size of the tag message.
1217 * May return 0 if TCQ is disabled for this device.
1219 int spi_populate_tag_msg(unsigned char *msg
, struct scsi_cmnd
*cmd
)
1221 if (cmd
->flags
& SCMD_TAGGED
) {
1222 *msg
++ = SIMPLE_QUEUE_TAG
;
1223 *msg
++ = cmd
->request
->tag
;
1229 EXPORT_SYMBOL_GPL(spi_populate_tag_msg
);
1231 #ifdef CONFIG_SCSI_CONSTANTS
1232 static const char * const one_byte_msgs
[] = {
1233 /* 0x00 */ "Task Complete", NULL
/* Extended Message */, "Save Pointers",
1234 /* 0x03 */ "Restore Pointers", "Disconnect", "Initiator Error",
1235 /* 0x06 */ "Abort Task Set", "Message Reject", "Nop", "Message Parity Error",
1236 /* 0x0a */ "Linked Command Complete", "Linked Command Complete w/flag",
1237 /* 0x0c */ "Target Reset", "Abort Task", "Clear Task Set",
1238 /* 0x0f */ "Initiate Recovery", "Release Recovery",
1239 /* 0x11 */ "Terminate Process", "Continue Task", "Target Transfer Disable",
1240 /* 0x14 */ NULL
, NULL
, "Clear ACA", "LUN Reset"
1243 static const char * const two_byte_msgs
[] = {
1244 /* 0x20 */ "Simple Queue Tag", "Head of Queue Tag", "Ordered Queue Tag",
1245 /* 0x23 */ "Ignore Wide Residue", "ACA"
1248 static const char * const extended_msgs
[] = {
1249 /* 0x00 */ "Modify Data Pointer", "Synchronous Data Transfer Request",
1250 /* 0x02 */ "SCSI-I Extended Identify", "Wide Data Transfer Request",
1251 /* 0x04 */ "Parallel Protocol Request", "Modify Bidirectional Data Pointer"
1254 static void print_nego(const unsigned char *msg
, int per
, int off
, int width
)
1258 period_to_str(buf
, msg
[per
]);
1259 printk("period = %s ns ", buf
);
1263 printk("offset = %d ", msg
[off
]);
1265 printk("width = %d ", 8 << msg
[width
]);
1268 static void print_ptr(const unsigned char *msg
, int msb
, const char *desc
)
1270 int ptr
= (msg
[msb
] << 24) | (msg
[msb
+1] << 16) | (msg
[msb
+2] << 8) |
1272 printk("%s = %d ", desc
, ptr
);
1275 int spi_print_msg(const unsigned char *msg
)
1278 if (msg
[0] == EXTENDED_MESSAGE
) {
1282 if (msg
[2] < ARRAY_SIZE(extended_msgs
))
1283 printk ("%s ", extended_msgs
[msg
[2]]);
1285 printk ("Extended Message, reserved code (0x%02x) ",
1288 case EXTENDED_MODIFY_DATA_POINTER
:
1289 print_ptr(msg
, 3, "pointer");
1292 print_nego(msg
, 3, 4, 0);
1295 print_nego(msg
, 0, 0, 3);
1298 print_nego(msg
, 3, 5, 6);
1300 case EXTENDED_MODIFY_BIDI_DATA_PTR
:
1301 print_ptr(msg
, 3, "out");
1302 print_ptr(msg
, 7, "in");
1305 for (i
= 2; i
< len
; ++i
)
1306 printk("%02x ", msg
[i
]);
1309 } else if (msg
[0] & 0x80) {
1310 printk("Identify disconnect %sallowed %s %d ",
1311 (msg
[0] & 0x40) ? "" : "not ",
1312 (msg
[0] & 0x20) ? "target routine" : "lun",
1314 /* Normal One byte */
1315 } else if (msg
[0] < 0x1f) {
1316 if (msg
[0] < ARRAY_SIZE(one_byte_msgs
) && one_byte_msgs
[msg
[0]])
1317 printk("%s ", one_byte_msgs
[msg
[0]]);
1319 printk("reserved (%02x) ", msg
[0]);
1320 } else if (msg
[0] == 0x55) {
1321 printk("QAS Request ");
1323 } else if (msg
[0] <= 0x2f) {
1324 if ((msg
[0] - 0x20) < ARRAY_SIZE(two_byte_msgs
))
1325 printk("%s %02x ", two_byte_msgs
[msg
[0] - 0x20],
1328 printk("reserved two byte (%02x %02x) ",
1332 printk("reserved ");
1335 EXPORT_SYMBOL(spi_print_msg
);
1337 #else /* ifndef CONFIG_SCSI_CONSTANTS */
1339 int spi_print_msg(const unsigned char *msg
)
1343 if (msg
[0] == EXTENDED_MESSAGE
) {
1347 for (i
= 0; i
< len
; ++i
)
1348 printk("%02x ", msg
[i
]);
1350 } else if (msg
[0] & 0x80) {
1351 printk("%02x ", msg
[0]);
1352 /* Normal One byte */
1353 } else if ((msg
[0] < 0x1f) || (msg
[0] == 0x55)) {
1354 printk("%02x ", msg
[0]);
1356 } else if (msg
[0] <= 0x2f) {
1357 printk("%02x %02x", msg
[0], msg
[1]);
1360 printk("%02x ", msg
[0]);
1363 EXPORT_SYMBOL(spi_print_msg
);
1364 #endif /* ! CONFIG_SCSI_CONSTANTS */
1366 static int spi_device_match(struct attribute_container
*cont
,
1369 struct scsi_device
*sdev
;
1370 struct Scsi_Host
*shost
;
1371 struct spi_internal
*i
;
1373 if (!scsi_is_sdev_device(dev
))
1376 sdev
= to_scsi_device(dev
);
1378 if (!shost
->transportt
|| shost
->transportt
->host_attrs
.ac
.class
1379 != &spi_host_class
.class)
1381 /* Note: this class has no device attributes, so it has
1382 * no per-HBA allocation and thus we don't need to distinguish
1383 * the attribute containers for the device */
1384 i
= to_spi_internal(shost
->transportt
);
1385 if (i
->f
->deny_binding
&& i
->f
->deny_binding(sdev
->sdev_target
))
1390 static int spi_target_match(struct attribute_container
*cont
,
1393 struct Scsi_Host
*shost
;
1394 struct scsi_target
*starget
;
1395 struct spi_internal
*i
;
1397 if (!scsi_is_target_device(dev
))
1400 shost
= dev_to_shost(dev
->parent
);
1401 if (!shost
->transportt
|| shost
->transportt
->host_attrs
.ac
.class
1402 != &spi_host_class
.class)
1405 i
= to_spi_internal(shost
->transportt
);
1406 starget
= to_scsi_target(dev
);
1408 if (i
->f
->deny_binding
&& i
->f
->deny_binding(starget
))
1411 return &i
->t
.target_attrs
.ac
== cont
;
1414 static DECLARE_TRANSPORT_CLASS(spi_transport_class
,
1416 spi_setup_transport_attrs
,
1418 spi_target_configure
);
1420 static DECLARE_ANON_TRANSPORT_CLASS(spi_device_class
,
1422 spi_device_configure
);
1424 static struct attribute
*host_attributes
[] = {
1425 &dev_attr_signalling
.attr
,
1426 &dev_attr_host_width
.attr
,
1427 &dev_attr_hba_id
.attr
,
1431 static struct attribute_group host_attribute_group
= {
1432 .attrs
= host_attributes
,
1435 static int spi_host_configure(struct transport_container
*tc
,
1437 struct device
*cdev
)
1439 struct kobject
*kobj
= &cdev
->kobj
;
1440 struct Scsi_Host
*shost
= transport_class_to_shost(cdev
);
1441 struct spi_internal
*si
= to_spi_internal(shost
->transportt
);
1442 struct attribute
*attr
= &dev_attr_signalling
.attr
;
1445 if (si
->f
->set_signalling
)
1446 rc
= sysfs_chmod_file(kobj
, attr
, attr
->mode
| S_IWUSR
);
1451 /* returns true if we should be showing the variable. Also
1452 * overloads the return by setting 1<<1 if the attribute should
1454 #define TARGET_ATTRIBUTE_HELPER(name) \
1455 (si->f->show_##name ? S_IRUGO : 0) | \
1456 (si->f->set_##name ? S_IWUSR : 0)
1458 static umode_t
target_attribute_is_visible(struct kobject
*kobj
,
1459 struct attribute
*attr
, int i
)
1461 struct device
*cdev
= container_of(kobj
, struct device
, kobj
);
1462 struct scsi_target
*starget
= transport_class_to_starget(cdev
);
1463 struct Scsi_Host
*shost
= transport_class_to_shost(cdev
);
1464 struct spi_internal
*si
= to_spi_internal(shost
->transportt
);
1466 if (attr
== &dev_attr_period
.attr
&&
1467 spi_support_sync(starget
))
1468 return TARGET_ATTRIBUTE_HELPER(period
);
1469 else if (attr
== &dev_attr_min_period
.attr
&&
1470 spi_support_sync(starget
))
1471 return TARGET_ATTRIBUTE_HELPER(period
);
1472 else if (attr
== &dev_attr_offset
.attr
&&
1473 spi_support_sync(starget
))
1474 return TARGET_ATTRIBUTE_HELPER(offset
);
1475 else if (attr
== &dev_attr_max_offset
.attr
&&
1476 spi_support_sync(starget
))
1477 return TARGET_ATTRIBUTE_HELPER(offset
);
1478 else if (attr
== &dev_attr_width
.attr
&&
1479 spi_support_wide(starget
))
1480 return TARGET_ATTRIBUTE_HELPER(width
);
1481 else if (attr
== &dev_attr_max_width
.attr
&&
1482 spi_support_wide(starget
))
1483 return TARGET_ATTRIBUTE_HELPER(width
);
1484 else if (attr
== &dev_attr_iu
.attr
&&
1485 spi_support_ius(starget
))
1486 return TARGET_ATTRIBUTE_HELPER(iu
);
1487 else if (attr
== &dev_attr_max_iu
.attr
&&
1488 spi_support_ius(starget
))
1489 return TARGET_ATTRIBUTE_HELPER(iu
);
1490 else if (attr
== &dev_attr_dt
.attr
&&
1491 spi_support_dt(starget
))
1492 return TARGET_ATTRIBUTE_HELPER(dt
);
1493 else if (attr
== &dev_attr_qas
.attr
&&
1494 spi_support_qas(starget
))
1495 return TARGET_ATTRIBUTE_HELPER(qas
);
1496 else if (attr
== &dev_attr_max_qas
.attr
&&
1497 spi_support_qas(starget
))
1498 return TARGET_ATTRIBUTE_HELPER(qas
);
1499 else if (attr
== &dev_attr_wr_flow
.attr
&&
1500 spi_support_ius(starget
))
1501 return TARGET_ATTRIBUTE_HELPER(wr_flow
);
1502 else if (attr
== &dev_attr_rd_strm
.attr
&&
1503 spi_support_ius(starget
))
1504 return TARGET_ATTRIBUTE_HELPER(rd_strm
);
1505 else if (attr
== &dev_attr_rti
.attr
&&
1506 spi_support_ius(starget
))
1507 return TARGET_ATTRIBUTE_HELPER(rti
);
1508 else if (attr
== &dev_attr_pcomp_en
.attr
&&
1509 spi_support_ius(starget
))
1510 return TARGET_ATTRIBUTE_HELPER(pcomp_en
);
1511 else if (attr
== &dev_attr_hold_mcs
.attr
&&
1512 spi_support_ius(starget
))
1513 return TARGET_ATTRIBUTE_HELPER(hold_mcs
);
1514 else if (attr
== &dev_attr_revalidate
.attr
)
1520 static struct attribute
*target_attributes
[] = {
1521 &dev_attr_period
.attr
,
1522 &dev_attr_min_period
.attr
,
1523 &dev_attr_offset
.attr
,
1524 &dev_attr_max_offset
.attr
,
1525 &dev_attr_width
.attr
,
1526 &dev_attr_max_width
.attr
,
1528 &dev_attr_max_iu
.attr
,
1531 &dev_attr_max_qas
.attr
,
1532 &dev_attr_wr_flow
.attr
,
1533 &dev_attr_rd_strm
.attr
,
1535 &dev_attr_pcomp_en
.attr
,
1536 &dev_attr_hold_mcs
.attr
,
1537 &dev_attr_revalidate
.attr
,
1541 static struct attribute_group target_attribute_group
= {
1542 .attrs
= target_attributes
,
1543 .is_visible
= target_attribute_is_visible
,
1546 static int spi_target_configure(struct transport_container
*tc
,
1548 struct device
*cdev
)
1550 struct kobject
*kobj
= &cdev
->kobj
;
1552 /* force an update based on parameters read from the device */
1553 sysfs_update_group(kobj
, &target_attribute_group
);
1558 struct scsi_transport_template
*
1559 spi_attach_transport(struct spi_function_template
*ft
)
1561 struct spi_internal
*i
= kzalloc(sizeof(struct spi_internal
),
1567 i
->t
.target_attrs
.ac
.class = &spi_transport_class
.class;
1568 i
->t
.target_attrs
.ac
.grp
= &target_attribute_group
;
1569 i
->t
.target_attrs
.ac
.match
= spi_target_match
;
1570 transport_container_register(&i
->t
.target_attrs
);
1571 i
->t
.target_size
= sizeof(struct spi_transport_attrs
);
1572 i
->t
.host_attrs
.ac
.class = &spi_host_class
.class;
1573 i
->t
.host_attrs
.ac
.grp
= &host_attribute_group
;
1574 i
->t
.host_attrs
.ac
.match
= spi_host_match
;
1575 transport_container_register(&i
->t
.host_attrs
);
1576 i
->t
.host_size
= sizeof(struct spi_host_attrs
);
1581 EXPORT_SYMBOL(spi_attach_transport
);
1583 void spi_release_transport(struct scsi_transport_template
*t
)
1585 struct spi_internal
*i
= to_spi_internal(t
);
1587 transport_container_unregister(&i
->t
.target_attrs
);
1588 transport_container_unregister(&i
->t
.host_attrs
);
1592 EXPORT_SYMBOL(spi_release_transport
);
1594 static __init
int spi_transport_init(void)
1596 int error
= scsi_dev_info_add_list(SCSI_DEVINFO_SPI
,
1597 "SCSI Parallel Transport Class");
1601 for (i
= 0; spi_static_device_list
[i
].vendor
; i
++)
1602 scsi_dev_info_list_add_keyed(1, /* compatible */
1603 spi_static_device_list
[i
].vendor
,
1604 spi_static_device_list
[i
].model
,
1606 spi_static_device_list
[i
].flags
,
1610 error
= transport_class_register(&spi_transport_class
);
1613 error
= anon_transport_class_register(&spi_device_class
);
1614 return transport_class_register(&spi_host_class
);
1617 static void __exit
spi_transport_exit(void)
1619 transport_class_unregister(&spi_transport_class
);
1620 anon_transport_class_unregister(&spi_device_class
);
1621 transport_class_unregister(&spi_host_class
);
1622 scsi_dev_info_remove_list(SCSI_DEVINFO_SPI
);
1625 MODULE_AUTHOR("Martin Hicks");
1626 MODULE_DESCRIPTION("SPI Transport Attributes");
1627 MODULE_LICENSE("GPL");
1629 module_init(spi_transport_init
);
1630 module_exit(spi_transport_exit
);