summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/isci/isci.h
blob: 234ab46fce3346948300d9ae95364e33103792ee (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
/*
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 * The full GNU General Public License is included in this distribution
 * in the file called LICENSE.GPL.
 *
 * BSD LICENSE
 *
 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   * Neither the name of Intel Corporation nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __ISCI_H__
#define __ISCI_H__

#include <linux/interrupt.h>
#include <linux/types.h>

#define DRV_NAME "isci"
#define SCI_PCI_BAR_COUNT 2
#define SCI_NUM_MSI_X_INT 2
#define SCI_SMU_BAR       0
#define SCI_SMU_BAR_SIZE  (16*1024)
#define SCI_SCU_BAR       1
#define SCI_SCU_BAR_SIZE  (4*1024*1024)
#define SCI_IO_SPACE_BAR0 2
#define SCI_IO_SPACE_BAR1 3
#define ISCI_CAN_QUEUE_VAL 250 /* < SCI_MAX_IO_REQUESTS ? */
#define SCIC_CONTROLLER_STOP_TIMEOUT 5000

#define SCI_CONTROLLER_INVALID_IO_TAG 0xFFFF

#define SCI_MAX_PHYS  (4UL)
#define SCI_MAX_PORTS SCI_MAX_PHYS
#define SCI_MAX_SMP_PHYS  (384) /* not silicon constrained */
#define SCI_MAX_REMOTE_DEVICES (256UL)
#define SCI_MAX_IO_REQUESTS (256UL)
#define SCI_MAX_SEQ (16)
#define SCI_MAX_MSIX_MESSAGES  (2)
#define SCI_MAX_SCATTER_GATHER_ELEMENTS 130 /* not silicon constrained */
#define SCI_MAX_CONTROLLERS 2
#define SCI_MAX_DOMAINS  SCI_MAX_PORTS

#define SCU_MAX_CRITICAL_NOTIFICATIONS    (384)
#define SCU_MAX_EVENTS_SHIFT		  (7)
#define SCU_MAX_EVENTS                    (1 << SCU_MAX_EVENTS_SHIFT)
#define SCU_MAX_UNSOLICITED_FRAMES        (128)
#define SCU_MAX_COMPLETION_QUEUE_SCRATCH  (128)
#define SCU_MAX_COMPLETION_QUEUE_ENTRIES  (SCU_MAX_CRITICAL_NOTIFICATIONS \
					   + SCU_MAX_EVENTS \
					   + SCU_MAX_UNSOLICITED_FRAMES	\
					   + SCI_MAX_IO_REQUESTS \
					   + SCU_MAX_COMPLETION_QUEUE_SCRATCH)
#define SCU_MAX_COMPLETION_QUEUE_SHIFT	  (ilog2(SCU_MAX_COMPLETION_QUEUE_ENTRIES))

#define SCU_ABSOLUTE_MAX_UNSOLICITED_FRAMES (4096)
#define SCU_UNSOLICITED_FRAME_BUFFER_SIZE   (1024U)
#define SCU_INVALID_FRAME_INDEX             (0xFFFF)

#define SCU_IO_REQUEST_MAX_SGE_SIZE         (0x00FFFFFF)
#define SCU_IO_REQUEST_MAX_TRANSFER_LENGTH  (0x00FFFFFF)

static inline void check_sizes(void)
{
	BUILD_BUG_ON_NOT_POWER_OF_2(SCU_MAX_EVENTS);
	BUILD_BUG_ON(SCU_MAX_UNSOLICITED_FRAMES <= 8);
	BUILD_BUG_ON_NOT_POWER_OF_2(SCU_MAX_UNSOLICITED_FRAMES);
	BUILD_BUG_ON_NOT_POWER_OF_2(SCU_MAX_COMPLETION_QUEUE_ENTRIES);
	BUILD_BUG_ON(SCU_MAX_UNSOLICITED_FRAMES > SCU_ABSOLUTE_MAX_UNSOLICITED_FRAMES);
	BUILD_BUG_ON_NOT_POWER_OF_2(SCI_MAX_IO_REQUESTS);
	BUILD_BUG_ON_NOT_POWER_OF_2(SCI_MAX_SEQ);
}

/**
 * enum sci_status - This is the general return status enumeration for non-IO,
 *    non-task management related SCI interface methods.
 *
 *
 */
enum sci_status {
	/**
	 * This member indicates successful completion.
	 */
	SCI_SUCCESS = 0,

	/**
	 * This value indicates that the calling method completed successfully,
	 * but that the IO may have completed before having it's start method
	 * invoked.  This occurs during SAT translation for requests that do
	 * not require an IO to the target or for any other requests that may
	 * be completed without having to submit IO.
	 */
	SCI_SUCCESS_IO_COMPLETE_BEFORE_START,

	/**
	 *  This Value indicates that the SCU hardware returned an early response
	 *  because the io request specified more data than is returned by the
	 *  target device (mode pages, inquiry data, etc.). The completion routine
	 *  will handle this case to get the actual number of bytes transferred.
	 */
	SCI_SUCCESS_IO_DONE_EARLY,

	/**
	 * This member indicates that the object for which a state change is
	 * being requested is already in said state.
	 */
	SCI_WARNING_ALREADY_IN_STATE,

	/**
	 * This member indicates interrupt coalescence timer may cause SAS
	 * specification compliance issues (i.e. SMP target mode response
	 * frames must be returned within 1.9 milliseconds).
	 */
	SCI_WARNING_TIMER_CONFLICT,

	/**
	 * This field indicates a sequence of action is not completed yet. Mostly,
	 * this status is used when multiple ATA commands are needed in a SATI translation.
	 */
	SCI_WARNING_SEQUENCE_INCOMPLETE,

	/**
	 * This member indicates that there was a general failure.
	 */
	SCI_FAILURE,

	/**
	 * This member indicates that the SCI implementation is unable to complete
	 * an operation due to a critical flaw the prevents any further operation
	 * (i.e. an invalid pointer).
	 */
	SCI_FATAL_ERROR,

	/**
	 * This member indicates the calling function failed, because the state
	 * of the controller is in a state that prevents successful completion.
	 */
	SCI_FAILURE_INVALID_STATE,

	/**
	 * This member indicates the calling function failed, because there is
	 * insufficient resources/memory to complete the request.
	 */
	SCI_FAILURE_INSUFFICIENT_RESOURCES,

	/**
	 * This member indicates the calling function failed, because the
	 * controller object required for the operation can't be located.
	 */
	SCI_FAILURE_CONTROLLER_NOT_FOUND,

	/**
	 * This member indicates the calling function failed, because the
	 * discovered controller type is not supported by the library.
	 */
	SCI_FAILURE_UNSUPPORTED_CONTROLLER_TYPE,

	/**
	 * This member indicates the calling function failed, because the
	 * requested initialization data version isn't supported.
	 */
	SCI_FAILURE_UNSUPPORTED_INIT_DATA_VERSION,

	/**
	 * This member indicates the calling function failed, because the
	 * requested configuration of SAS Phys into SAS Ports is not supported.
	 */
	SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION,

	/**
	 * This member indicates the calling function failed, because the
	 * requested protocol is not supported by the remote device, port,
	 * or controller.
	 */
	SCI_FAILURE_UNSUPPORTED_PROTOCOL,

	/**
	 * This member indicates the calling function failed, because the
	 * requested information type is not supported by the SCI implementation.
	 */
	SCI_FAILURE_UNSUPPORTED_INFORMATION_TYPE,

	/**
	 * This member indicates the calling function failed, because the
	 * device already exists.
	 */
	SCI_FAILURE_DEVICE_EXISTS,

	/**
	 * This member indicates the calling function failed, because adding
	 * a phy to the object is not possible.
	 */
	SCI_FAILURE_ADDING_PHY_UNSUPPORTED,

	/**
	 * This member indicates the calling function failed, because the
	 * requested information type is not supported by the SCI implementation.
	 */
	SCI_FAILURE_UNSUPPORTED_INFORMATION_FIELD,

	/**
	 * This member indicates the calling function failed, because the SCI
	 * implementation does not support the supplied time limit.
	 */
	SCI_FAILURE_UNSUPPORTED_TIME_LIMIT,

	/**
	 * This member indicates the calling method failed, because the SCI
	 * implementation does not contain the specified Phy.
	 */
	SCI_FAILURE_INVALID_PHY,

	/**
	 * This member indicates the calling method failed, because the SCI
	 * implementation does not contain the specified Port.
	 */
	SCI_FAILURE_INVALID_PORT,

	/**
	 * This member indicates the calling method was partly successful
	 * The port was reset but not all phys in port are operational
	 */
	SCI_FAILURE_RESET_PORT_PARTIAL_SUCCESS,

	/**
	 * This member indicates that calling method failed
	 * The port reset did not complete because none of the phys are operational
	 */
	SCI_FAILURE_RESET_PORT_FAILURE,

	/**
	 * This member indicates the calling method failed, because the SCI
	 * implementation does not contain the specified remote device.
	 */
	SCI_FAILURE_INVALID_REMOTE_DEVICE,

	/**
	 * This member indicates the calling method failed, because the remote
	 * device is in a bad state and requires a reset.
	 */
	SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED,

	/**
	 * This member indicates the calling method failed, because the SCI
	 * implementation does not contain or support the specified IO tag.
	 */
	SCI_FAILURE_INVALID_IO_TAG,

	/**
	 * This member indicates that the operation failed and the user should
	 * check the response data associated with the IO.
	 */
	SCI_FAILURE_IO_RESPONSE_VALID,

	/**
	 * This member indicates that the operation failed, the failure is
	 * controller implementation specific, and the response data associated
	 * with the request is not valid.  You can query for the controller
	 * specific error information via sci_controller_get_request_status()
	 */
	SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR,

	/**
	 * This member indicated that the operation failed because the
	 * user requested this IO to be terminated.
	 */
	SCI_FAILURE_IO_TERMINATED,

	/**
	 * This member indicates that the operation failed and the associated
	 * request requires a SCSI abort task to be sent to the target.
	 */
	SCI_FAILURE_IO_REQUIRES_SCSI_ABORT,

	/**
	 * This member indicates that the operation failed because the supplied
	 * device could not be located.
	 */
	SCI_FAILURE_DEVICE_NOT_FOUND,

	/**
	 * This member indicates that the operation failed because the
	 * objects association is required and is not correctly set.
	 */
	SCI_FAILURE_INVALID_ASSOCIATION,

	/**
	 * This member indicates that the operation failed, because a timeout
	 * occurred.
	 */
	SCI_FAILURE_TIMEOUT,

	/**
	 * This member indicates that the operation failed, because the user
	 * specified a value that is either invalid or not supported.
	 */
	SCI_FAILURE_INVALID_PARAMETER_VALUE,

	/**
	 * This value indicates that the operation failed, because the number
	 * of messages (MSI-X) is not supported.
	 */
	SCI_FAILURE_UNSUPPORTED_MESSAGE_COUNT,

	/**
	 * This value indicates that the method failed due to a lack of
	 * available NCQ tags.
	 */
	SCI_FAILURE_NO_NCQ_TAG_AVAILABLE,

	/**
	 * This value indicates that a protocol violation has occurred on the
	 * link.
	 */
	SCI_FAILURE_PROTOCOL_VIOLATION,

	/**
	 * This value indicates a failure condition that retry may help to clear.
	 */
	SCI_FAILURE_RETRY_REQUIRED,

	/**
	 * This field indicates the retry limit was reached when a retry is attempted
	 */
	SCI_FAILURE_RETRY_LIMIT_REACHED,

	/**
	 * This member indicates the calling method was partly successful.
	 * Mostly, this status is used when a LUN_RESET issued to an expander attached
	 * STP device in READY NCQ substate needs to have RNC suspended/resumed
	 * before posting TC.
	 */
	SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS,

	/**
	 * This field indicates an illegal phy connection based on the routing attribute
	 * of both expander phy attached to each other.
	 */
	SCI_FAILURE_ILLEGAL_ROUTING_ATTRIBUTE_CONFIGURATION,

	/**
	 * This field indicates a CONFIG ROUTE INFO command has a response with function result
	 * INDEX DOES NOT EXIST, usually means exceeding max route index.
	 */
	SCI_FAILURE_EXCEED_MAX_ROUTE_INDEX,

	/**
	 * This value indicates that an unsupported PCI device ID has been
	 * specified.  This indicates that attempts to invoke
	 * sci_library_allocate_controller() will fail.
	 */
	SCI_FAILURE_UNSUPPORTED_PCI_DEVICE_ID

};

/**
 * enum sci_io_status - This enumeration depicts all of the possible IO
 *    completion status values.  Each value in this enumeration maps directly
 *    to a value in the enum sci_status enumeration.  Please refer to that
 *    enumeration for detailed comments concerning what the status represents.
 *
 * Add the API to retrieve the SCU status from the core. Check to see that the
 * following status are properly handled: - SCI_IO_FAILURE_UNSUPPORTED_PROTOCOL
 * - SCI_IO_FAILURE_INVALID_IO_TAG
 */
enum sci_io_status {
	SCI_IO_SUCCESS                         = SCI_SUCCESS,
	SCI_IO_FAILURE                         = SCI_FAILURE,
	SCI_IO_SUCCESS_COMPLETE_BEFORE_START   = SCI_SUCCESS_IO_COMPLETE_BEFORE_START,
	SCI_IO_SUCCESS_IO_DONE_EARLY           = SCI_SUCCESS_IO_DONE_EARLY,
	SCI_IO_FAILURE_INVALID_STATE           = SCI_FAILURE_INVALID_STATE,
	SCI_IO_FAILURE_INSUFFICIENT_RESOURCES  = SCI_FAILURE_INSUFFICIENT_RESOURCES,
	SCI_IO_FAILURE_UNSUPPORTED_PROTOCOL    = SCI_FAILURE_UNSUPPORTED_PROTOCOL,
	SCI_IO_FAILURE_RESPONSE_VALID          = SCI_FAILURE_IO_RESPONSE_VALID,
	SCI_IO_FAILURE_CONTROLLER_SPECIFIC_ERR = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR,
	SCI_IO_FAILURE_TERMINATED              = SCI_FAILURE_IO_TERMINATED,
	SCI_IO_FAILURE_REQUIRES_SCSI_ABORT     = SCI_FAILURE_IO_REQUIRES_SCSI_ABORT,
	SCI_IO_FAILURE_INVALID_PARAMETER_VALUE = SCI_FAILURE_INVALID_PARAMETER_VALUE,
	SCI_IO_FAILURE_NO_NCQ_TAG_AVAILABLE    = SCI_FAILURE_NO_NCQ_TAG_AVAILABLE,
	SCI_IO_FAILURE_PROTOCOL_VIOLATION      = SCI_FAILURE_PROTOCOL_VIOLATION,

	SCI_IO_FAILURE_REMOTE_DEVICE_RESET_REQUIRED = SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED,

	SCI_IO_FAILURE_RETRY_REQUIRED      = SCI_FAILURE_RETRY_REQUIRED,
	SCI_IO_FAILURE_RETRY_LIMIT_REACHED = SCI_FAILURE_RETRY_LIMIT_REACHED,
	SCI_IO_FAILURE_INVALID_REMOTE_DEVICE = SCI_FAILURE_INVALID_REMOTE_DEVICE
};

/**
 * enum sci_task_status - This enumeration depicts all of the possible task
 *    completion status values.  Each value in this enumeration maps directly
 *    to a value in the enum sci_status enumeration.  Please refer to that
 *    enumeration for detailed comments concerning what the status represents.
 *
 * Check to see that the following status are properly handled:
 */
enum sci_task_status {
	SCI_TASK_SUCCESS                         = SCI_SUCCESS,
	SCI_TASK_FAILURE                         = SCI_FAILURE,
	SCI_TASK_FAILURE_INVALID_STATE           = SCI_FAILURE_INVALID_STATE,
	SCI_TASK_FAILURE_INSUFFICIENT_RESOURCES  = SCI_FAILURE_INSUFFICIENT_RESOURCES,
	SCI_TASK_FAILURE_UNSUPPORTED_PROTOCOL    = SCI_FAILURE_UNSUPPORTED_PROTOCOL,
	SCI_TASK_FAILURE_INVALID_TAG             = SCI_FAILURE_INVALID_IO_TAG,
	SCI_TASK_FAILURE_RESPONSE_VALID          = SCI_FAILURE_IO_RESPONSE_VALID,
	SCI_TASK_FAILURE_CONTROLLER_SPECIFIC_ERR = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR,
	SCI_TASK_FAILURE_TERMINATED              = SCI_FAILURE_IO_TERMINATED,
	SCI_TASK_FAILURE_INVALID_PARAMETER_VALUE = SCI_FAILURE_INVALID_PARAMETER_VALUE,

	SCI_TASK_FAILURE_REMOTE_DEVICE_RESET_REQUIRED = SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED,
	SCI_TASK_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS = SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS

};

/**
 * sci_swab32_cpy - convert between scsi and scu-hardware byte format
 * @dest: receive the 4-byte endian swapped version of src
 * @src: word aligned source buffer
 *
 * scu hardware handles SSP/SMP control, response, and unidentified
 * frames in "big endian dword" order.  Regardless of host endian this
 * is always a swab32()-per-dword conversion of the standard definition,
 * i.e. single byte fields swapped and multi-byte fields in little-
 * endian
 */
static inline void sci_swab32_cpy(void *_dest, void *_src, ssize_t word_cnt)
{
	u32 *dest = _dest, *src = _src;

	while (--word_cnt >= 0)
		dest[word_cnt] = swab32(src[word_cnt]);
}

extern unsigned char no_outbound_task_to;
extern u16 ssp_max_occ_to;
extern u16 stp_max_occ_to;
extern u16 ssp_inactive_to;
extern u16 stp_inactive_to;
extern unsigned char phy_gen;
extern unsigned char max_concurr_spinup;
extern uint cable_selection_override;

irqreturn_t isci_msix_isr(int vec, void *data);
irqreturn_t isci_intx_isr(int vec, void *data);
irqreturn_t isci_error_isr(int vec, void *data);

/*
 * Each timer is associated with a cancellation flag that is set when
 * del_timer() is called and checked in the timer callback function. This
 * is needed since del_timer_sync() cannot be called with sci_lock held.
 * For deinit however, del_timer_sync() is used without holding the lock.
 */
struct sci_timer {
	struct timer_list	timer;
	bool			cancel;
};

static inline
void sci_init_timer(struct sci_timer *tmr, void (*fn)(unsigned long))
{
	tmr->timer.function = fn;
	tmr->timer.data = (unsigned long) tmr;
	tmr->cancel = 0;
	init_timer(&tmr->timer);
}

static inline void sci_mod_timer(struct sci_timer *tmr, unsigned long msec)
{
	tmr->cancel = 0;
	mod_timer(&tmr->timer, jiffies + msecs_to_jiffies(msec));
}

static inline void sci_del_timer(struct sci_timer *tmr)
{
	tmr->cancel = 1;
	del_timer(&tmr->timer);
}

struct sci_base_state_machine {
	const struct sci_base_state *state_table;
	u32 initial_state_id;
	u32 current_state_id;
	u32 previous_state_id;
};

typedef void (*sci_state_transition_t)(struct sci_base_state_machine *sm);

struct sci_base_state {
	sci_state_transition_t enter_state;	/* Called on state entry */
	sci_state_transition_t exit_state;	/* Called on state exit */
};

extern void sci_init_sm(struct sci_base_state_machine *sm,
			const struct sci_base_state *state_table,
			u32 initial_state);
extern void sci_change_state(struct sci_base_state_machine *sm, u32 next_state);
#endif  /* __ISCI_H__ */