aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/scsi/isci/phy.h
blob: 45fecfa36a987ef81c8491d0573a7068ce7ef6d8 (plain) (blame)
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
/*
 * 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_PHY_H_
#define _ISCI_PHY_H_

#include <scsi/sas.h>
#include <scsi/libsas.h>
#include "isci.h"
#include "sas.h"

/* This is the timeout value for the SATA phy to wait for a SIGNATURE FIS
 * before restarting the starting state machine.  Technically, the old parallel
 * ATA specification required up to 30 seconds for a device to issue its
 * signature FIS as a result of a soft reset.  Now we see that devices respond
 * generally within 15 seconds, but we'll use 25 for now.
 */
#define SCIC_SDS_SIGNATURE_FIS_TIMEOUT    25000

/* This is the timeout for the SATA OOB/SN because the hardware does not
 * recognize a hot plug after OOB signal but before the SN signals.  We need to
 * make sure after a hotplug timeout if we have not received the speed event
 * notification from the hardware that we restart the hardware OOB state
 * machine.
 */
#define SCIC_SDS_SATA_LINK_TRAINING_TIMEOUT  250

/**
 * isci_phy - hba local phy infrastructure
 * @sm:
 * @protocol: attached device protocol
 * @phy_index: physical index relative to the controller (0-3)
 * @bcn_received_while_port_unassigned: bcn to report after port association
 * @sata_timer: timeout SATA signature FIS arrival
 */
struct isci_phy {
	struct sci_base_state_machine sm;
	struct isci_port *owning_port;
	enum sas_linkrate max_negotiated_speed;
	enum sas_protocol protocol;
	u8 phy_index;
	bool bcn_received_while_port_unassigned;
	bool is_in_link_training;
	struct sci_timer sata_timer;
	struct scu_transport_layer_registers __iomem *transport_layer_registers;
	struct scu_link_layer_registers __iomem *link_layer_registers;
	struct asd_sas_phy sas_phy;
	u8 sas_addr[SAS_ADDR_SIZE];
	union {
		struct sas_identify_frame iaf;
		struct dev_to_host_fis fis;
	} frame_rcvd;
};

static inline struct isci_phy *to_iphy(struct asd_sas_phy *sas_phy)
{
	struct isci_phy *iphy = container_of(sas_phy, typeof(*iphy), sas_phy);

	return iphy;
}

struct sci_phy_cap {
	union {
		struct {
			/*
			 * The SAS specification indicates the start bit shall
			 * always be set to
			 * 1.  This implementation will have the start bit set
			 * to 0 if the PHY CAPABILITIES were either not
			 * received or speed negotiation failed.
			 */
			u8 start:1;
			u8 tx_ssc_type:1;
			u8 res1:2;
			u8 req_logical_linkrate:4;

			u32 gen1_no_ssc:1;
			u32 gen1_ssc:1;
			u32 gen2_no_ssc:1;
			u32 gen2_ssc:1;
			u32 gen3_no_ssc:1;
			u32 gen3_ssc:1;
			u32 res2:17;
			u32 parity:1;
		};
		u32 all;
	};
}  __packed;

/* this data structure reflects the link layer transmit identification reg */
struct sci_phy_proto {
	union {
		struct {
			u16 _r_a:1;
			u16 smp_iport:1;
			u16 stp_iport:1;
			u16 ssp_iport:1;
			u16 _r_b:4;
			u16 _r_c:1;
			u16 smp_tport:1;
			u16 stp_tport:1;
			u16 ssp_tport:1;
			u16 _r_d:4;
		};
		u16 all;
	};
} __packed;


/**
 * struct sci_phy_properties - This structure defines the properties common to
 *    all phys that can be retrieved.
 *
 *
 */
struct sci_phy_properties {
	/**
	 * This field specifies the port that currently contains the
	 * supplied phy.  This field may be set to NULL
	 * if the phy is not currently contained in a port.
	 */
	struct isci_port *iport;

	/**
	 * This field specifies the link rate at which the phy is
	 * currently operating.
	 */
	enum sas_linkrate negotiated_link_rate;

	/**
	 * This field specifies the index of the phy in relation to other
	 * phys within the controller.  This index is zero relative.
	 */
	u8 index;
};

/**
 * struct sci_sas_phy_properties - This structure defines the properties,
 *    specific to a SAS phy, that can be retrieved.
 *
 *
 */
struct sci_sas_phy_properties {
	/**
	 * This field delineates the Identify Address Frame received
	 * from the remote end point.
	 */
	struct sas_identify_frame rcvd_iaf;

	/**
	 * This field delineates the Phy capabilities structure received
	 * from the remote end point.
	 */
	struct sci_phy_cap rcvd_cap;

};

/**
 * struct sci_sata_phy_properties - This structure defines the properties,
 *    specific to a SATA phy, that can be retrieved.
 *
 *
 */
struct sci_sata_phy_properties {
	/**
	 * This field delineates the signature FIS received from the
	 * attached target.
	 */
	struct dev_to_host_fis signature_fis;

	/**
	 * This field specifies to the user if a port selector is connected
	 * on the specified phy.
	 */
	bool is_port_selector_present;

};

/**
 * enum sci_phy_counter_id - This enumeration depicts the various pieces of
 *    optional information that can be retrieved for a specific phy.
 *
 *
 */
enum sci_phy_counter_id {
	/**
	 * This PHY information field tracks the number of frames received.
	 */
	SCIC_PHY_COUNTER_RECEIVED_FRAME,

	/**
	 * This PHY information field tracks the number of frames transmitted.
	 */
	SCIC_PHY_COUNTER_TRANSMITTED_FRAME,

	/**
	 * This PHY information field tracks the number of DWORDs received.
	 */
	SCIC_PHY_COUNTER_RECEIVED_FRAME_WORD,

	/**
	 * This PHY information field tracks the number of DWORDs transmitted.
	 */
	SCIC_PHY_COUNTER_TRANSMITTED_FRAME_DWORD,

	/**
	 * This PHY information field tracks the number of times DWORD
	 * synchronization was lost.
	 */
	SCIC_PHY_COUNTER_LOSS_OF_SYNC_ERROR,

	/**
	 * This PHY information field tracks the number of received DWORDs with
	 * running disparity errors.
	 */
	SCIC_PHY_COUNTER_RECEIVED_DISPARITY_ERROR,

	/**
	 * This PHY information field tracks the number of received frames with a
	 * CRC error (not including short or truncated frames).
	 */
	SCIC_PHY_COUNTER_RECEIVED_FRAME_CRC_ERROR,

	/**
	 * This PHY information field tracks the number of DONE (ACK/NAK TIMEOUT)
	 * primitives received.
	 */
	SCIC_PHY_COUNTER_RECEIVED_DONE_ACK_NAK_TIMEOUT,

	/**
	 * This PHY information field tracks the number of DONE (ACK/NAK TIMEOUT)
	 * primitives transmitted.
	 */
	SCIC_PHY_COUNTER_TRANSMITTED_DONE_ACK_NAK_TIMEOUT,

	/**
	 * This PHY information field tracks the number of times the inactivity
	 * timer for connections on the phy has been utilized.
	 */
	SCIC_PHY_COUNTER_INACTIVITY_TIMER_EXPIRED,

	/**
	 * This PHY information field tracks the number of DONE (CREDIT TIMEOUT)
	 * primitives received.
	 */
	SCIC_PHY_COUNTER_RECEIVED_DONE_CREDIT_TIMEOUT,

	/**
	 * This PHY information field tracks the number of DONE (CREDIT TIMEOUT)
	 * primitives transmitted.
	 */
	SCIC_PHY_COUNTER_TRANSMITTED_DONE_CREDIT_TIMEOUT,

	/**
	 * This PHY information field tracks the number of CREDIT BLOCKED
	 * primitives received.
	 * @note Depending on remote device implementation, credit blocks
	 *       may occur regularly.
	 */
	SCIC_PHY_COUNTER_RECEIVED_CREDIT_BLOCKED,

	/**
	 * This PHY information field contains the number of short frames
	 * received.  A short frame is simply a frame smaller then what is
	 * allowed by either the SAS or SATA specification.
	 */
	SCIC_PHY_COUNTER_RECEIVED_SHORT_FRAME,

	/**
	 * This PHY information field contains the number of frames received after
	 * credit has been exhausted.
	 */
	SCIC_PHY_COUNTER_RECEIVED_FRAME_WITHOUT_CREDIT,

	/**
	 * This PHY information field contains the number of frames received after
	 * a DONE has been received.
	 */
	SCIC_PHY_COUNTER_RECEIVED_FRAME_AFTER_DONE,

	/**
	 * This PHY information field contains the number of times the phy
	 * failed to achieve DWORD synchronization during speed negotiation.
	 */
	SCIC_PHY_COUNTER_SN_DWORD_SYNC_ERROR
};

/**
 * enum sci_phy_states - phy state machine states
 * @SCI_PHY_INITIAL: Simply the initial state for the base domain state
 *		     machine.
 * @SCI_PHY_STOPPED: phy has successfully been stopped.  In this state
 *		     no new IO operations are permitted on this phy.
 * @SCI_PHY_STARTING: the phy is in the process of becomming ready.  In
 *		      this state no new IO operations are permitted on
 *		      this phy.
 * @SCI_PHY_SUB_INITIAL: Initial state
 * @SCI_PHY_SUB_AWAIT_OSSP_EN: Wait state for the hardware OSSP event
 *			       type notification
 * @SCI_PHY_SUB_AWAIT_SAS_SPEED_EN: Wait state for the PHY speed
 *				    notification
 * @SCI_PHY_SUB_AWAIT_IAF_UF: Wait state for the IAF Unsolicited frame
 *			      notification
 * @SCI_PHY_SUB_AWAIT_SAS_POWER: Wait state for the request to consume
 *				 power
 * @SCI_PHY_SUB_AWAIT_SATA_POWER: Wait state for request to consume
 *				  power
 * @SCI_PHY_SUB_AWAIT_SATA_PHY_EN: Wait state for the SATA PHY
 *				   notification
 * @SCI_PHY_SUB_AWAIT_SATA_SPEED_EN: Wait for the SATA PHY speed
 *				     notification
 * @SCI_PHY_SUB_AWAIT_SIG_FIS_UF: Wait state for the SIGNATURE FIS
 *				  unsolicited frame notification
 * @SCI_PHY_SUB_FINAL: Exit state for this state machine
 * @SCI_PHY_READY: phy is now ready.  Thus, the user is able to perform
 *		   IO operations utilizing this phy as long as it is
 *		   currently part of a valid port.  This state is
 *		   entered from the STARTING state.
 * @SCI_PHY_RESETTING: phy is in the process of being reset.  In this
 *		       state no new IO operations are permitted on this
 *		       phy.  This state is entered from the READY state.
 * @SCI_PHY_FINAL: Simply the final state for the base phy state
 *		   machine.
 */
#define PHY_STATES {\
	C(PHY_INITIAL),\
	C(PHY_STOPPED),\
	C(PHY_STARTING),\
	C(PHY_SUB_INITIAL),\
	C(PHY_SUB_AWAIT_OSSP_EN),\
	C(PHY_SUB_AWAIT_SAS_SPEED_EN),\
	C(PHY_SUB_AWAIT_IAF_UF),\
	C(PHY_SUB_AWAIT_SAS_POWER),\
	C(PHY_SUB_AWAIT_SATA_POWER),\
	C(PHY_SUB_AWAIT_SATA_PHY_EN),\
	C(PHY_SUB_AWAIT_SATA_SPEED_EN),\
	C(PHY_SUB_AWAIT_SIG_FIS_UF),\
	C(PHY_SUB_FINAL),\
	C(PHY_READY),\
	C(PHY_RESETTING),\
	C(PHY_FINAL),\
	}
#undef C
#define C(a) SCI_##a
enum sci_phy_states PHY_STATES;
#undef C

void sci_phy_construct(
	struct isci_phy *iphy,
	struct isci_port *iport,
	u8 phy_index);

struct isci_port *phy_get_non_dummy_port(struct isci_phy *iphy);

void sci_phy_set_port(
	struct isci_phy *iphy,
	struct isci_port *iport);

enum sci_status sci_phy_initialize(
	struct isci_phy *iphy,
	struct scu_transport_layer_registers __iomem *transport_layer_registers,
	struct scu_link_layer_registers __iomem *link_layer_registers);

enum sci_status sci_phy_start(
	struct isci_phy *iphy);

enum sci_status sci_phy_stop(
	struct isci_phy *iphy);

enum sci_status sci_phy_reset(
	struct isci_phy *iphy);

void sci_phy_resume(
	struct isci_phy *iphy);

void sci_phy_setup_transport(
	struct isci_phy *iphy,
	u32 device_id);

enum sci_status sci_phy_event_handler(
	struct isci_phy *iphy,
	u32 event_code);

enum sci_status sci_phy_frame_handler(
	struct isci_phy *iphy,
	u32 frame_index);

enum sci_status sci_phy_consume_power_handler(
	struct isci_phy *iphy);

void sci_phy_get_sas_address(
	struct isci_phy *iphy,
	struct sci_sas_address *sas_address);

void sci_phy_get_attached_sas_address(
	struct isci_phy *iphy,
	struct sci_sas_address *sas_address);

struct sci_phy_proto;
void sci_phy_get_protocols(
	struct isci_phy *iphy,
	struct sci_phy_proto *protocols);
enum sas_linkrate sci_phy_linkrate(struct isci_phy *iphy);

struct isci_host;
void isci_phy_init(struct isci_phy *iphy, struct isci_host *ihost, int index);
int isci_phy_control(struct asd_sas_phy *phy, enum phy_func func, void *buf);

#endif /* !defined(_ISCI_PHY_H_) */