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
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2003-2018, Intel Corporation. All rights reserved
* Intel Management Engine Interface (Intel MEI) Linux driver
*/
#ifndef _MEI_HW_TYPES_H_
#define _MEI_HW_TYPES_H_
#include <linux/uuid.h>
/*
* Timeouts in Seconds
*/
#define MEI_HW_READY_TIMEOUT 2 /* Timeout on ready message */
#define MEI_CONNECT_TIMEOUT 3 /* HPS: at least 2 seconds */
#define MEI_CL_CONNECT_TIMEOUT 15 /* HPS: Client Connect Timeout */
#define MEI_CLIENTS_INIT_TIMEOUT 15 /* HPS: Clients Enumeration Timeout */
#define MEI_PGI_TIMEOUT 1 /* PG Isolation time response 1 sec */
#define MEI_D0I3_TIMEOUT 5 /* D0i3 set/unset max response time */
#define MEI_HBM_TIMEOUT 1 /* 1 second */
/*
* MEI Version
*/
#define HBM_MINOR_VERSION 1
#define HBM_MAJOR_VERSION 2
/*
* MEI version with PGI support
*/
#define HBM_MINOR_VERSION_PGI 1
#define HBM_MAJOR_VERSION_PGI 1
/*
* MEI version with Dynamic clients support
*/
#define HBM_MINOR_VERSION_DC 0
#define HBM_MAJOR_VERSION_DC 2
/*
* MEI version with immediate reply to enum request support
*/
#define HBM_MINOR_VERSION_IE 0
#define HBM_MAJOR_VERSION_IE 2
/*
* MEI version with disconnect on connection timeout support
*/
#define HBM_MINOR_VERSION_DOT 0
#define HBM_MAJOR_VERSION_DOT 2
/*
* MEI version with notification support
*/
#define HBM_MINOR_VERSION_EV 0
#define HBM_MAJOR_VERSION_EV 2
/*
* MEI version with fixed address client support
*/
#define HBM_MINOR_VERSION_FA 0
#define HBM_MAJOR_VERSION_FA 2
/*
* MEI version with OS ver message support
*/
#define HBM_MINOR_VERSION_OS 0
#define HBM_MAJOR_VERSION_OS 2
/*
* MEI version with dma ring support
*/
#define HBM_MINOR_VERSION_DR 1
#define HBM_MAJOR_VERSION_DR 2
/* Host bus message command opcode */
#define MEI_HBM_CMD_OP_MSK 0x7f
/* Host bus message command RESPONSE */
#define MEI_HBM_CMD_RES_MSK 0x80
/*
* MEI Bus Message Command IDs
*/
#define HOST_START_REQ_CMD 0x01
#define HOST_START_RES_CMD 0x81
#define HOST_STOP_REQ_CMD 0x02
#define HOST_STOP_RES_CMD 0x82
#define ME_STOP_REQ_CMD 0x03
#define HOST_ENUM_REQ_CMD 0x04
#define HOST_ENUM_RES_CMD 0x84
#define HOST_CLIENT_PROPERTIES_REQ_CMD 0x05
#define HOST_CLIENT_PROPERTIES_RES_CMD 0x85
#define CLIENT_CONNECT_REQ_CMD 0x06
#define CLIENT_CONNECT_RES_CMD 0x86
#define CLIENT_DISCONNECT_REQ_CMD 0x07
#define CLIENT_DISCONNECT_RES_CMD 0x87
#define MEI_FLOW_CONTROL_CMD 0x08
#define MEI_PG_ISOLATION_ENTRY_REQ_CMD 0x0a
#define MEI_PG_ISOLATION_ENTRY_RES_CMD 0x8a
#define MEI_PG_ISOLATION_EXIT_REQ_CMD 0x0b
#define MEI_PG_ISOLATION_EXIT_RES_CMD 0x8b
#define MEI_HBM_ADD_CLIENT_REQ_CMD 0x0f
#define MEI_HBM_ADD_CLIENT_RES_CMD 0x8f
#define MEI_HBM_NOTIFY_REQ_CMD 0x10
#define MEI_HBM_NOTIFY_RES_CMD 0x90
#define MEI_HBM_NOTIFICATION_CMD 0x11
#define MEI_HBM_DMA_SETUP_REQ_CMD 0x12
#define MEI_HBM_DMA_SETUP_RES_CMD 0x92
/*
* MEI Stop Reason
* used by hbm_host_stop_request.reason
*/
enum mei_stop_reason_types {
DRIVER_STOP_REQUEST = 0x00,
DEVICE_D1_ENTRY = 0x01,
DEVICE_D2_ENTRY = 0x02,
DEVICE_D3_ENTRY = 0x03,
SYSTEM_S1_ENTRY = 0x04,
SYSTEM_S2_ENTRY = 0x05,
SYSTEM_S3_ENTRY = 0x06,
SYSTEM_S4_ENTRY = 0x07,
SYSTEM_S5_ENTRY = 0x08
};
/**
* enum mei_hbm_status - mei host bus messages return values
*
* @MEI_HBMS_SUCCESS : status success
* @MEI_HBMS_CLIENT_NOT_FOUND : client not found
* @MEI_HBMS_ALREADY_EXISTS : connection already established
* @MEI_HBMS_REJECTED : connection is rejected
* @MEI_HBMS_INVALID_PARAMETER : invalid parameter
* @MEI_HBMS_NOT_ALLOWED : operation not allowed
* @MEI_HBMS_ALREADY_STARTED : system is already started
* @MEI_HBMS_NOT_STARTED : system not started
*
* @MEI_HBMS_MAX : sentinel
*/
enum mei_hbm_status {
MEI_HBMS_SUCCESS = 0,
MEI_HBMS_CLIENT_NOT_FOUND = 1,
MEI_HBMS_ALREADY_EXISTS = 2,
MEI_HBMS_REJECTED = 3,
MEI_HBMS_INVALID_PARAMETER = 4,
MEI_HBMS_NOT_ALLOWED = 5,
MEI_HBMS_ALREADY_STARTED = 6,
MEI_HBMS_NOT_STARTED = 7,
MEI_HBMS_MAX
};
/*
* Client Connect Status
* used by hbm_client_connect_response.status
*/
enum mei_cl_connect_status {
MEI_CL_CONN_SUCCESS = MEI_HBMS_SUCCESS,
MEI_CL_CONN_NOT_FOUND = MEI_HBMS_CLIENT_NOT_FOUND,
MEI_CL_CONN_ALREADY_STARTED = MEI_HBMS_ALREADY_EXISTS,
MEI_CL_CONN_OUT_OF_RESOURCES = MEI_HBMS_REJECTED,
MEI_CL_CONN_MESSAGE_SMALL = MEI_HBMS_INVALID_PARAMETER,
MEI_CL_CONN_NOT_ALLOWED = MEI_HBMS_NOT_ALLOWED,
};
/*
* Client Disconnect Status
*/
enum mei_cl_disconnect_status {
MEI_CL_DISCONN_SUCCESS = MEI_HBMS_SUCCESS
};
/**
* struct mei_msg_hdr - MEI BUS Interface Section
*
* @me_addr: device address
* @host_addr: host address
* @length: message length
* @reserved: reserved
* @dma_ring: message is on dma ring
* @internal: message is internal
* @msg_complete: last packet of the message
* @extension: extension of the header
*/
struct mei_msg_hdr {
u32 me_addr:8;
u32 host_addr:8;
u32 length:9;
u32 reserved:4;
u32 dma_ring:1;
u32 internal:1;
u32 msg_complete:1;
u32 extension[0];
} __packed;
/* The length is up to 9 bits */
#define MEI_MSG_MAX_LEN_MASK GENMASK(9, 0)
#define MEI_MSG_HDR_MAX 2
struct mei_bus_message {
u8 hbm_cmd;
u8 data[];
} __packed;
/**
* struct hbm_cl_cmd - client specific host bus command
* CONNECT, DISCONNECT, and FlOW CONTROL
*
* @hbm_cmd: bus message command header
* @me_addr: address of the client in ME
* @host_addr: address of the client in the driver
* @data: generic data
*/
struct mei_hbm_cl_cmd {
u8 hbm_cmd;
u8 me_addr;
u8 host_addr;
u8 data;
};
struct hbm_version {
u8 minor_version;
u8 major_version;
} __packed;
struct hbm_host_version_request {
u8 hbm_cmd;
u8 reserved;
struct hbm_version host_version;
} __packed;
struct hbm_host_version_response {
u8 hbm_cmd;
u8 host_version_supported;
struct hbm_version me_max_version;
} __packed;
struct hbm_host_stop_request {
u8 hbm_cmd;
u8 reason;
u8 reserved[2];
} __packed;
struct hbm_host_stop_response {
u8 hbm_cmd;
u8 reserved[3];
} __packed;
struct hbm_me_stop_request {
u8 hbm_cmd;
u8 reason;
u8 reserved[2];
} __packed;
/**
* enum hbm_host_enum_flags - enumeration request flags (HBM version >= 2.0)
*
* @MEI_HBM_ENUM_F_ALLOW_ADD: allow dynamic clients add
* @MEI_HBM_ENUM_F_IMMEDIATE_ENUM: allow FW to send answer immediately
*/
enum hbm_host_enum_flags {
MEI_HBM_ENUM_F_ALLOW_ADD = BIT(0),
MEI_HBM_ENUM_F_IMMEDIATE_ENUM = BIT(1),
};
/**
* struct hbm_host_enum_request - enumeration request from host to fw
*
* @hbm_cmd : bus message command header
* @flags : request flags
* @reserved: reserved
*/
struct hbm_host_enum_request {
u8 hbm_cmd;
u8 flags;
u8 reserved[2];
} __packed;
struct hbm_host_enum_response {
u8 hbm_cmd;
u8 reserved[3];
u8 valid_addresses[32];
} __packed;
struct mei_client_properties {
uuid_le protocol_name;
u8 protocol_version;
u8 max_number_of_connections;
u8 fixed_address;
u8 single_recv_buf:1;
u8 reserved:7;
u32 max_msg_length;
} __packed;
struct hbm_props_request {
u8 hbm_cmd;
u8 me_addr;
u8 reserved[2];
} __packed;
struct hbm_props_response {
u8 hbm_cmd;
u8 me_addr;
u8 status;
u8 reserved[1];
struct mei_client_properties client_properties;
} __packed;
/**
* struct hbm_add_client_request - request to add a client
* might be sent by fw after enumeration has already completed
*
* @hbm_cmd: bus message command header
* @me_addr: address of the client in ME
* @reserved: reserved
* @client_properties: client properties
*/
struct hbm_add_client_request {
u8 hbm_cmd;
u8 me_addr;
u8 reserved[2];
struct mei_client_properties client_properties;
} __packed;
/**
* struct hbm_add_client_response - response to add a client
* sent by the host to report client addition status to fw
*
* @hbm_cmd: bus message command header
* @me_addr: address of the client in ME
* @status: if HBMS_SUCCESS then the client can now accept connections.
* @reserved: reserved
*/
struct hbm_add_client_response {
u8 hbm_cmd;
u8 me_addr;
u8 status;
u8 reserved[1];
} __packed;
/**
* struct hbm_power_gate - power gate request/response
*
* @hbm_cmd: bus message command header
* @reserved: reserved
*/
struct hbm_power_gate {
u8 hbm_cmd;
u8 reserved[3];
} __packed;
/**
* struct hbm_client_connect_request - connect/disconnect request
*
* @hbm_cmd: bus message command header
* @me_addr: address of the client in ME
* @host_addr: address of the client in the driver
* @reserved: reserved
*/
struct hbm_client_connect_request {
u8 hbm_cmd;
u8 me_addr;
u8 host_addr;
u8 reserved;
} __packed;
/**
* struct hbm_client_connect_response - connect/disconnect response
*
* @hbm_cmd: bus message command header
* @me_addr: address of the client in ME
* @host_addr: address of the client in the driver
* @status: status of the request
*/
struct hbm_client_connect_response {
u8 hbm_cmd;
u8 me_addr;
u8 host_addr;
u8 status;
} __packed;
#define MEI_FC_MESSAGE_RESERVED_LENGTH 5
struct hbm_flow_control {
u8 hbm_cmd;
u8 me_addr;
u8 host_addr;
u8 reserved[MEI_FC_MESSAGE_RESERVED_LENGTH];
} __packed;
#define MEI_HBM_NOTIFICATION_START 1
#define MEI_HBM_NOTIFICATION_STOP 0
/**
* struct hbm_notification_request - start/stop notification request
*
* @hbm_cmd: bus message command header
* @me_addr: address of the client in ME
* @host_addr: address of the client in the driver
* @start: start = 1 or stop = 0 asynchronous notifications
*/
struct hbm_notification_request {
u8 hbm_cmd;
u8 me_addr;
u8 host_addr;
u8 start;
} __packed;
/**
* struct hbm_notification_response - start/stop notification response
*
* @hbm_cmd: bus message command header
* @me_addr: address of the client in ME
* @host_addr: - address of the client in the driver
* @status: (mei_hbm_status) response status for the request
* - MEI_HBMS_SUCCESS: successful stop/start
* - MEI_HBMS_CLIENT_NOT_FOUND: if the connection could not be found.
* - MEI_HBMS_ALREADY_STARTED: for start requests for a previously
* started notification.
* - MEI_HBMS_NOT_STARTED: for stop request for a connected client for whom
* asynchronous notifications are currently disabled.
*
* @start: start = 1 or stop = 0 asynchronous notifications
* @reserved: reserved
*/
struct hbm_notification_response {
u8 hbm_cmd;
u8 me_addr;
u8 host_addr;
u8 status;
u8 start;
u8 reserved[3];
} __packed;
/**
* struct hbm_notification - notification event
*
* @hbm_cmd: bus message command header
* @me_addr: address of the client in ME
* @host_addr: address of the client in the driver
* @reserved: reserved for alignment
*/
struct hbm_notification {
u8 hbm_cmd;
u8 me_addr;
u8 host_addr;
u8 reserved[1];
} __packed;
/**
* struct hbm_dma_mem_dscr - dma ring
*
* @addr_hi: the high 32bits of 64 bit address
* @addr_lo: the low 32bits of 64 bit address
* @size : size in bytes (must be power of 2)
*/
struct hbm_dma_mem_dscr
|