1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (c) 2003-2020, Intel Corporation. All rights reserved
4 * Intel Management Engine Interface (Intel MEI) Linux driver
5 */
6
7 #ifndef _MEI_HW_TYPES_H_
8 #define _MEI_HW_TYPES_H_
9
10 #include <linux/uuid.h>
11
12 /*
13 * Timeouts in Seconds
14 */
15 #define MEI_HW_READY_TIMEOUT 2 /* Timeout on ready message */
16 #define MEI_CONNECT_TIMEOUT 3 /* HPS: at least 2 seconds */
17
18 #define MEI_CL_CONNECT_TIMEOUT 15 /* HPS: Client Connect Timeout */
19 #define MEI_CLIENTS_INIT_TIMEOUT 15 /* HPS: Clients Enumeration Timeout */
20
21 #define MEI_PGI_TIMEOUT 1 /* PG Isolation time response 1 sec */
22 #define MEI_D0I3_TIMEOUT 5 /* D0i3 set/unset max response time */
23 #define MEI_HBM_TIMEOUT 1 /* 1 second */
24
25 /*
26 * MEI Version
27 */
28 #define HBM_MINOR_VERSION 2
29 #define HBM_MAJOR_VERSION 2
30
31 /*
32 * MEI version with PGI support
33 */
34 #define HBM_MINOR_VERSION_PGI 1
35 #define HBM_MAJOR_VERSION_PGI 1
36
37 /*
38 * MEI version with Dynamic clients support
39 */
40 #define HBM_MINOR_VERSION_DC 0
41 #define HBM_MAJOR_VERSION_DC 2
42
43 /*
44 * MEI version with immediate reply to enum request support
45 */
46 #define HBM_MINOR_VERSION_IE 0
47 #define HBM_MAJOR_VERSION_IE 2
48
49 /*
50 * MEI version with disconnect on connection timeout support
51 */
52 #define HBM_MINOR_VERSION_DOT 0
53 #define HBM_MAJOR_VERSION_DOT 2
54
55 /*
56 * MEI version with notification support
57 */
58 #define HBM_MINOR_VERSION_EV 0
59 #define HBM_MAJOR_VERSION_EV 2
60
61 /*
62 * MEI version with fixed address client support
63 */
64 #define HBM_MINOR_VERSION_FA 0
65 #define HBM_MAJOR_VERSION_FA 2
66
67 /*
68 * MEI version with OS ver message support
69 */
70 #define HBM_MINOR_VERSION_OS 0
71 #define HBM_MAJOR_VERSION_OS 2
72
73 /*
74 * MEI version with dma ring support
75 */
76 #define HBM_MINOR_VERSION_DR 1
77 #define HBM_MAJOR_VERSION_DR 2
78
79 /*
80 * MEI version with vm tag support
81 */
82 #define HBM_MINOR_VERSION_VT 2
83 #define HBM_MAJOR_VERSION_VT 2
84
85 /*
86 * MEI version with capabilities message support
87 */
88 #define HBM_MINOR_VERSION_CAP 2
89 #define HBM_MAJOR_VERSION_CAP 2
90
91 /*
92 * MEI version with client DMA support
93 */
94 #define HBM_MINOR_VERSION_CD 2
95 #define HBM_MAJOR_VERSION_CD 2
96
97 /* Host bus message command opcode */
98 #define MEI_HBM_CMD_OP_MSK 0x7f
99 /* Host bus message command RESPONSE */
100 #define MEI_HBM_CMD_RES_MSK 0x80
101
102 /*
103 * MEI Bus Message Command IDs
104 */
105 #define HOST_START_REQ_CMD 0x01
106 #define HOST_START_RES_CMD 0x81
107
108 #define HOST_STOP_REQ_CMD 0x02
109 #define HOST_STOP_RES_CMD 0x82
110
111 #define ME_STOP_REQ_CMD 0x03
112
113 #define HOST_ENUM_REQ_CMD 0x04
114 #define HOST_ENUM_RES_CMD 0x84
115
116 #define HOST_CLIENT_PROPERTIES_REQ_CMD 0x05
117 #define HOST_CLIENT_PROPERTIES_RES_CMD 0x85
118
119 #define CLIENT_CONNECT_REQ_CMD 0x06
120 #define CLIENT_CONNECT_RES_CMD 0x86
121
122 #define CLIENT_DISCONNECT_REQ_CMD 0x07
123 #define CLIENT_DISCONNECT_RES_CMD 0x87
124
125 #define MEI_FLOW_CONTROL_CMD 0x08
126
127 #define MEI_PG_ISOLATION_ENTRY_REQ_CMD 0x0a
128 #define MEI_PG_ISOLATION_ENTRY_RES_CMD 0x8a
129 #define MEI_PG_ISOLATION_EXIT_REQ_CMD 0x0b
130 #define MEI_PG_ISOLATION_EXIT_RES_CMD 0x8b
131
132 #define MEI_HBM_ADD_CLIENT_REQ_CMD 0x0f
133 #define MEI_HBM_ADD_CLIENT_RES_CMD 0x8f
134
135 #define MEI_HBM_NOTIFY_REQ_CMD 0x10
136 #define MEI_HBM_NOTIFY_RES_CMD 0x90
137 #define MEI_HBM_NOTIFICATION_CMD 0x11
138
139 #define MEI_HBM_DMA_SETUP_REQ_CMD 0x12
140 #define MEI_HBM_DMA_SETUP_RES_CMD 0x92
141
142 #define MEI_HBM_CAPABILITIES_REQ_CMD 0x13
143 #define MEI_HBM_CAPABILITIES_RES_CMD 0x93
144
145 #define MEI_HBM_CLIENT_DMA_MAP_REQ_CMD 0x14
146 #define MEI_HBM_CLIENT_DMA_MAP_RES_CMD 0x94
147
148 #define MEI_HBM_CLIENT_DMA_UNMAP_REQ_CMD 0x15
149 #define MEI_HBM_CLIENT_DMA_UNMAP_RES_CMD 0x95
150
151 /*
152 * MEI Stop Reason
153 * used by hbm_host_stop_request.reason
154 */
155 enum mei_stop_reason_types {
156 DRIVER_STOP_REQUEST = 0x00,
157 DEVICE_D1_ENTRY = 0x01,
158 DEVICE_D2_ENTRY = 0x02,
159 DEVICE_D3_ENTRY = 0x03,
160 SYSTEM_S1_ENTRY = 0x04,
161 SYSTEM_S2_ENTRY = 0x05,
162 SYSTEM_S3_ENTRY = 0x06,
163 SYSTEM_S4_ENTRY = 0x07,
164 SYSTEM_S5_ENTRY = 0x08
165 };
166
167
168 /**
169 * enum mei_hbm_status - mei host bus messages return values
170 *
171 * @MEI_HBMS_SUCCESS : status success
172 * @MEI_HBMS_CLIENT_NOT_FOUND : client not found
173 * @MEI_HBMS_ALREADY_EXISTS : connection already established
174 * @MEI_HBMS_REJECTED : connection is rejected
175 * @MEI_HBMS_INVALID_PARAMETER : invalid parameter
176 * @MEI_HBMS_NOT_ALLOWED : operation not allowed
177 * @MEI_HBMS_ALREADY_STARTED : system is already started
178 * @MEI_HBMS_NOT_STARTED : system not started
179 *
180 * @MEI_HBMS_MAX : sentinel
181 */
182 enum mei_hbm_status {
183 MEI_HBMS_SUCCESS = 0,
184 MEI_HBMS_CLIENT_NOT_FOUND = 1,
185 MEI_HBMS_ALREADY_EXISTS = 2,
186 MEI_HBMS_REJECTED = 3,
187 MEI_HBMS_INVALID_PARAMETER = 4,
188 MEI_HBMS_NOT_ALLOWED = 5,
189 MEI_HBMS_ALREADY_STARTED = 6,
190 MEI_HBMS_NOT_STARTED = 7,
191
192 MEI_HBMS_MAX
193 };
194
195
196 /*
197 * Client Connect Status
198 * used by hbm_client_connect_response.status
199 */
200 enum mei_cl_connect_status {
201 MEI_CL_CONN_SUCCESS = MEI_HBMS_SUCCESS,
202 MEI_CL_CONN_NOT_FOUND = MEI_HBMS_CLIENT_NOT_FOUND,
203 MEI_CL_CONN_ALREADY_STARTED = MEI_HBMS_ALREADY_EXISTS,
204 MEI_CL_CONN_OUT_OF_RESOURCES = MEI_HBMS_REJECTED,
205 MEI_CL_CONN_MESSAGE_SMALL = MEI_HBMS_INVALID_PARAMETER,
206 MEI_CL_CONN_NOT_ALLOWED = MEI_HBMS_NOT_ALLOWED,
207 };
208
209 /*
210 * Client Disconnect Status
211 */
212 enum mei_cl_disconnect_status {
213 MEI_CL_DISCONN_SUCCESS = MEI_HBMS_SUCCESS
214 };
215
216 /**
217 * enum mei_ext_hdr_type - extended header type used in
218 * extended header TLV
219 *
220 * @MEI_EXT_HDR_NONE: sentinel
221 * @MEI_EXT_HDR_VTAG: vtag header
222 */
223 enum mei_ext_hdr_type {
224 MEI_EXT_HDR_NONE = 0,
225 MEI_EXT_HDR_VTAG = 1,
226 };
227
228 /**
229 * struct mei_ext_hdr - extend header descriptor (TLV)
230 * @type: enum mei_ext_hdr_type
231 * @length: length excluding descriptor
232 * @ext_payload: payload of the specific extended header
233 * @hdr: place holder for actual header
234 */
235 struct mei_ext_hdr {
236 u8 type;
237 u8 length;
238 u8 data[];
239 } __packed;
240
241 /**
242 * struct mei_ext_meta_hdr - extend header meta data
243 * @count: number of headers
244 * @size: total size of the extended header list excluding meta header
245 * @reserved: reserved
246 * @hdrs: extended headers TLV list
247 */
248 struct mei_ext_meta_hdr {
249 u8 count;
250 u8 size;
251 u8 reserved[2];
252 u8 hdrs[];
253 } __packed;
254
255 /**
256 * struct mei_ext_hdr_vtag - extend header for vtag
257 *
258 * @hdr: standard extend header
259 * @vtag: virtual tag
260 * @reserved: reserved
261 */
262 struct mei_ext_hdr_vtag {
263 struct mei_ext_hdr hdr;
264 u8 vtag;
265 u8 reserved;
266 } __packed;
267
268 /*
269 * Extended header iterator functions
270 */
271 /**
272 * mei_ext_hdr - extended header iterator begin
273 *
274 * @meta: meta header of the extended header list
275 *
276 * Return:
277 * The first extended header
278 */
mei_ext_begin(struct mei_ext_meta_hdr * meta)279 static inline struct mei_ext_hdr *mei_ext_begin(struct mei_ext_meta_hdr *meta)
280 {
281 return (struct mei_ext_hdr *)meta->hdrs;
282 }
283
284 /**
285 * mei_ext_last - check if the ext is the last one in the TLV list
286 *
287 * @meta: meta header of the extended header list
288 * @ext: a meta header on the list
289 *
290 * Return: true if ext is the last header on the list
291 */
mei_ext_last(struct mei_ext_meta_hdr * meta,struct mei_ext_hdr * ext)292 static inline bool mei_ext_last(struct mei_ext_meta_hdr *meta,
293 struct mei_ext_hdr *ext)
294 {
295 return (u8 *)ext >= (u8 *)meta + sizeof(*meta) + (meta->size * 4);
296 }
297
298 /**
299 * mei_ext_next - following extended header on the TLV list
300 *
301 * @ext: current extend header
302 *
303 * Context: The function does not check for the overflows,
304 * one should call mei_ext_last before.
305 *
306 * Return: The following extend header after @ext
307 */
mei_ext_next(struct mei_ext_hdr * ext)308 static inline struct mei_ext_hdr *mei_ext_next(struct mei_ext_hdr *ext)
309 {
310 return (struct mei_ext_hdr *)((u8 *)ext + (ext->length * 4));
311 }
312
313 /**
314 * struct mei_msg_hdr - MEI BUS Interface Section
315 *
316 * @me_addr: device address
317 * @host_addr: host address
318 * @length: message length
319 * @reserved: reserved
320 * @extended: message has extended header
321 * @dma_ring: message is on dma ring
322 * @internal: message is internal
323 * @msg_complete: last packet of the message
324 * @extension: extension of the header
325 */
326 struct mei_msg_hdr {
327 u32 me_addr:8;
328 u32 host_addr:8;
329 u32 length:9;
330 u32 reserved:3;
331 u32 extended:1;
332 u32 dma_ring:1;
333 u32 internal:1;
334 u32 msg_complete:1;
335 u32 extension[];
336 } __packed;
337
338 /* The length is up to 9 bits */
339 #define MEI_MSG_MAX_LEN_MASK GENMASK(9, 0)
340
341 struct mei_bus_message {
342 u8 hbm_cmd;
343 u8 data[];
344 } __packed;
345
346 /**
347 * struct hbm_cl_cmd - client specific host bus command
348 * CONNECT, DISCONNECT, and FlOW CONTROL
349 *
350 * @hbm_cmd: bus message command header
351 * @me_addr: address of the client in ME
352 * @host_addr: address of the client in the driver
353 * @data: generic data
354 */
355 struct mei_hbm_cl_cmd {
356 u8 hbm_cmd;
357 u8 me_addr;
358 u8 host_addr;
359 u8 data;
360 };
361
362 struct hbm_version {
363 u8 minor_version;
364 u8 major_version;
365 } __packed;
366
367 struct hbm_host_version_request {
368 u8 hbm_cmd;
369 u8 reserved;
370 struct hbm_version host_version;
371 } __packed;
372
373 struct hbm_host_version_response {
374 u8 hbm_cmd;
375 u8 host_version_supported;
376 struct hbm_version me_max_version;
377 } __packed;
378
379 struct hbm_host_stop_request {
380 u8 hbm_cmd;
381 u8 reason;
382 u8 reserved[2];
383 } __packed;
384
385 struct hbm_host_stop_response {
386 u8 hbm_cmd;
387 u8 reserved[3];
388 } __packed;
389
390 struct hbm_me_stop_request {
391 u8 hbm_cmd;
392 u8 reason;
393 u8 reserved[2];
394 } __packed;
395
396 /**
397 * enum hbm_host_enum_flags - enumeration request flags (HBM version >= 2.0)
398 *
399 * @MEI_HBM_ENUM_F_ALLOW_ADD: allow dynamic clients add
400 * @MEI_HBM_ENUM_F_IMMEDIATE_ENUM: allow FW to send answer immediately
401 */
402 enum hbm_host_enum_flags {
403 MEI_HBM_ENUM_F_ALLOW_ADD = BIT(0),
404 MEI_HBM_ENUM_F_IMMEDIATE_ENUM = BIT(1),
405 };
406
407 /**
408 * struct hbm_host_enum_request - enumeration request from host to fw
409 *
410 * @hbm_cmd : bus message command header
411 * @flags : request flags
412 * @reserved: reserved
413 */
414 struct hbm_host_enum_request {
415 u8 hbm_cmd;
416 u8 flags;
417 u8 reserved[2];
418 } __packed;
419
420 struct hbm_host_enum_response {
421 u8 hbm_cmd;
422 u8 reserved[3];
423 u8 valid_addresses[32];
424 } __packed;
425
426 /**
427 * struct mei_client_properties - mei client properties
428 *
429 * @protocol_name: guid of the client
430 * @protocol_version: client protocol version
431 * @max_number_of_connections: number of possible connections.
432 * @fixed_address: fixed me address (0 if the client is dynamic)
433 * @single_recv_buf: 1 if all connections share a single receive buffer.
434 * @vt_supported: the client support vtag
435 * @reserved: reserved
436 * @max_msg_length: MTU of the client
437 */
438 struct mei_client_properties {
439 uuid_le protocol_name;
440 u8 protocol_version;
441 u8 max_number_of_connections;
442 u8 fixed_address;
443 u8 single_recv_buf:1;
444 u8 vt_supported:1;
445 u8 reserved:6;
446 u32 max_msg_length;
447 } __packed;
448
449 struct hbm_props_request {
450 u8 hbm_cmd;
451 u8 me_addr;
452 u8 reserved[2];
453 } __packed;
454
455 struct hbm_props_response {
456 u8 hbm_cmd;
457 u8 me_addr;
458 u8 status;
459 u8 reserved;
460 struct mei_client_properties client_properties;
461 } __packed;
462
463 /**
464 * struct hbm_add_client_request - request to add a client
465 * might be sent by fw after enumeration has already completed
466 *
467 * @hbm_cmd: bus message command header
468 * @me_addr: address of the client in ME
469 * @reserved: reserved
470 * @client_properties: client properties
471 */
472 struct hbm_add_client_request {
473 u8 hbm_cmd;
474 u8 me_addr;
475 u8 reserved[2];
476 struct mei_client_properties client_properties;
477 } __packed;
478
479 /**
480 * struct hbm_add_client_response - response to add a client
481 * sent by the host to report client addition status to fw
482 *
483 * @hbm_cmd: bus message command header
484 * @me_addr: address of the client in ME
485 * @status: if HBMS_SUCCESS then the client can now accept connections.
486 * @reserved: reserved
487 */
488 struct hbm_add_client_response {
489 u8 hbm_cmd;
490 u8 me_addr;
491 u8 status;
492 u8 reserved;
493 } __packed;
494
495 /**
496 * struct hbm_power_gate - power gate request/response
497 *
498 * @hbm_cmd: bus message command header
499 * @reserved: reserved
500 */
501 struct hbm_power_gate {
502 u8 hbm_cmd;
503 u8 reserved[3];
504 } __packed;
505
506 /**
507 * struct hbm_client_connect_request - connect/disconnect request
508 *
509 * @hbm_cmd: bus message command header
510 * @me_addr: address of the client in ME
511 * @host_addr: address of the client in the driver
512 * @reserved: reserved
513 */
514 struct hbm_client_connect_request {
515 u8 hbm_cmd;
516 u8 me_addr;
517 u8 host_addr;
518 u8 reserved;
519 } __packed;
520
521 /**
522 * struct hbm_client_connect_response - connect/disconnect response
523 *
524 * @hbm_cmd: bus message command header
525 * @me_addr: address of the client in ME
526 * @host_addr: address of the client in the driver
527 * @status: status of the request
528 */
529 struct hbm_client_connect_response {
530 u8 hbm_cmd;
531 u8 me_addr;
532 u8 host_addr;
533 u8 status;
534 } __packed;
535
536
537 #define MEI_FC_MESSAGE_RESERVED_LENGTH 5
538
539 struct hbm_flow_control {
540 u8 hbm_cmd;
541 u8 me_addr;
542 u8 host_addr;
543 u8 reserved[MEI_FC_MESSAGE_RESERVED_LENGTH];
544 } __packed;
545
546 #define MEI_HBM_NOTIFICATION_START 1
547 #define MEI_HBM_NOTIFICATION_STOP 0
548 /**
549 * struct hbm_notification_request - start/stop notification request
550 *
551 * @hbm_cmd: bus message command header
552 * @me_addr: address of the client in ME
553 * @host_addr: address of the client in the driver
554 * @start: start = 1 or stop = 0 asynchronous notifications
555 */
556 struct hbm_notification_request {
557 u8 hbm_cmd;
558 u8 me_addr;
559 u8 host_addr;
560 u8 start;
561 } __packed;
562
563 /**
564 * struct hbm_notification_response - start/stop notification response
565 *
566 * @hbm_cmd: bus message command header
567 * @me_addr: address of the client in ME
568 * @host_addr: - address of the client in the driver
569 * @status: (mei_hbm_status) response status for the request
570 * - MEI_HBMS_SUCCESS: successful stop/start
571 * - MEI_HBMS_CLIENT_NOT_FOUND: if the connection could not be found.
572 * - MEI_HBMS_ALREADY_STARTED: for start requests for a previously
573 * started notification.
574 * - MEI_HBMS_NOT_STARTED: for stop request for a connected client for whom
575 * asynchronous notifications are currently disabled.
576 *
577 * @start: start = 1 or stop = 0 asynchronous notifications
578 * @reserved: reserved
579 */
580 struct hbm_notification_response {
581 u8 hbm_cmd;
582 u8 me_addr;
583 u8 host_addr;
584 u8 status;
585 u8 start;
586 u8 reserved[3];
587 } __packed;
588
589 /**
590 * struct hbm_notification - notification event
591 *
592 * @hbm_cmd: bus message command header
593 * @me_addr: address of the client in ME
594 * @host_addr: address of the client in the driver
595 * @reserved: reserved for alignment
596 */
597 struct hbm_notification {
598 u8 hbm_cmd;
599 u8 me_addr;
600 u8 host_addr;
601 u8 reserved;
602 } __packed;
603
604 /**
605 * struct hbm_dma_mem_dscr - dma ring
606 *
607 * @addr_hi: the high 32bits of 64 bit address
608 * @addr_lo: the low 32bits of 64 bit address
609 * @size : size in bytes (must be power of 2)
610 */
611 struct hbm_dma_mem_dscr {
612 u32 addr_hi;
613 u32 addr_lo;
614 u32 size;
615 } __packed;
616
617 enum {
618 DMA_DSCR_HOST = 0,
619 DMA_DSCR_DEVICE = 1,
620 DMA_DSCR_CTRL = 2,
621 DMA_DSCR_NUM,
622 };
623
624 /**
625 * struct hbm_dma_setup_request - dma setup request
626 *
627 * @hbm_cmd: bus message command header
628 * @reserved: reserved for alignment
629 * @dma_dscr: dma descriptor for HOST, DEVICE, and CTRL
630 */
631 struct hbm_dma_setup_request {
632 u8 hbm_cmd;
633 u8 reserved[3];
634 struct hbm_dma_mem_dscr dma_dscr[DMA_DSCR_NUM];
635 } __packed;
636
637 /**
638 * struct hbm_dma_setup_response - dma setup response
639 *
640 * @hbm_cmd: bus message command header
641 * @status: 0 on success; otherwise DMA setup failed.
642 * @reserved: reserved for alignment
643 */
644 struct hbm_dma_setup_response {
645 u8 hbm_cmd;
646 u8 status;
647 u8 reserved[2];
648 } __packed;
649
650 /**
651 * struct mei_dma_ring_ctrl - dma ring control block
652 *
653 * @hbuf_wr_idx: host circular buffer write index in slots
654 * @reserved1: reserved for alignment
655 * @hbuf_rd_idx: host circular buffer read index in slots
656 * @reserved2: reserved for alignment
657 * @dbuf_wr_idx: device circular buffer write index in slots
658 * @reserved3: reserved for alignment
659 * @dbuf_rd_idx: device circular buffer read index in slots
660 * @reserved4: reserved for alignment
661 */
662 struct hbm_dma_ring_ctrl {
663 u32 hbuf_wr_idx;
664 u32 reserved1;
665 u32 hbuf_rd_idx;
666 u32 reserved2;
667 u32 dbuf_wr_idx;
668 u32 reserved3;
669 u32 dbuf_rd_idx;
670 u32 reserved4;
671 } __packed;
672
673 /* virtual tag supported */
674 #define HBM_CAP_VT BIT(0)
675 /* client dma supported */
676 #define HBM_CAP_CD BIT(2)
677
678 /**
679 * struct hbm_capability_request - capability request from host to fw
680 *
681 * @hbm_cmd : bus message command header
682 * @capability_requested: bitmask of capabilities requested by host
683 */
684 struct hbm_capability_request {
685 u8 hbm_cmd;
686 u8 capability_requested[3];
687 } __packed;
688
689 /**
690 * struct hbm_capability_response - capability response from fw to host
691 *
692 * @hbm_cmd : bus message command header
693 * @capability_granted: bitmask of capabilities granted by FW
694 */
695 struct hbm_capability_response {
696 u8 hbm_cmd;
697 u8 capability_granted[3];
698 } __packed;
699
700 /**
701 * struct hbm_client_dma_map_request - client dma map request from host to fw
702 *
703 * @hbm_cmd: bus message command header
704 * @client_buffer_id: client buffer id
705 * @reserved: reserved
706 * @address_lsb: DMA address LSB
707 * @address_msb: DMA address MSB
708 * @size: DMA size
709 */
710 struct hbm_client_dma_map_request {
711 u8 hbm_cmd;
712 u8 client_buffer_id;
713 u8 reserved[2];
714 u32 address_lsb;
715 u32 address_msb;
716 u32 size;
717 } __packed;
718
719 /**
720 * struct hbm_client_dma_unmap_request
721 * client dma unmap request from the host to the firmware
722 *
723 * @hbm_cmd: bus message command header
724 * @status: unmap status
725 * @client_buffer_id: client buffer id
726 * @reserved: reserved
727 */
728 struct hbm_client_dma_unmap_request {
729 u8 hbm_cmd;
730 u8 status;
731 u8 client_buffer_id;
732 u8 reserved;
733 } __packed;
734
735 /**
736 * struct hbm_client_dma_response
737 * client dma unmap response from the firmware to the host
738 *
739 * @hbm_cmd: bus message command header
740 * @status: command status
741 */
742 struct hbm_client_dma_response {
743 u8 hbm_cmd;
744 u8 status;
745 } __packed;
746
747 #endif
748