brcm-message.h

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 *  Copyright (C) 2016 Broadcom
 4 *
 5 * Common header for Broadcom mailbox messages which is shared across
 6 * Broadcom SoCs and Broadcom mailbox client drivers.
 7 */
 8
 9#ifndef _LINUX_BRCM_MESSAGE_H_
10#define _LINUX_BRCM_MESSAGE_H_
11
12#include <linux/scatterlist.h>
13
14enum brcm_message_type {
15	BRCM_MESSAGE_UNKNOWN = 0,
16	BRCM_MESSAGE_BATCH,
17	BRCM_MESSAGE_SPU,
18	BRCM_MESSAGE_SBA,
19	BRCM_MESSAGE_MAX,
20};
21
22struct brcm_sba_command {
23	u64 cmd;
24	u64 *cmd_dma;
25	dma_addr_t cmd_dma_addr;
26#define BRCM_SBA_CMD_TYPE_A		BIT(0)
27#define BRCM_SBA_CMD_TYPE_B		BIT(1)
28#define BRCM_SBA_CMD_TYPE_C		BIT(2)
29#define BRCM_SBA_CMD_HAS_RESP		BIT(3)
30#define BRCM_SBA_CMD_HAS_OUTPUT		BIT(4)
31	u64 flags;
32	dma_addr_t resp;
33	size_t resp_len;
34	dma_addr_t data;
35	size_t data_len;
36};
37
38struct brcm_message {
39	enum brcm_message_type type;
40	union {
41		struct {
42			struct brcm_message *msgs;
43			unsigned int msgs_queued;
44			unsigned int msgs_count;
45		} batch;
46		struct {
47			struct scatterlist *src;
48			struct scatterlist *dst;
49		} spu;
50		struct {
51			struct brcm_sba_command *cmds;
52			unsigned int cmds_count;
53		} sba;
54	};
55	void *ctx;
56	int error;
57};
58
59#endif /* _LINUX_BRCM_MESSAGE_H_ */