cregit-Linux how code gets into the kernel

Release 4.12 include/linux/mailbox/brcm-message.h

/*
 *  Copyright (C) 2016 Broadcom
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Common header for Broadcom mailbox messages which is shared across
 * Broadcom SoCs and Broadcom mailbox client drivers.
 */

#ifndef _LINUX_BRCM_MESSAGE_H_

#define _LINUX_BRCM_MESSAGE_H_

#include <linux/scatterlist.h>


enum brcm_message_type {
	
BRCM_MESSAGE_UNKNOWN = 0,
	
BRCM_MESSAGE_BATCH,
	
BRCM_MESSAGE_SPU,
	
BRCM_MESSAGE_SBA,
	
BRCM_MESSAGE_MAX,
};


struct brcm_sba_command {
	
u64 cmd;
	
u64 *cmd_dma;
	
dma_addr_t cmd_dma_addr;

#define BRCM_SBA_CMD_TYPE_A		BIT(0)

#define BRCM_SBA_CMD_TYPE_B		BIT(1)

#define BRCM_SBA_CMD_TYPE_C		BIT(2)

#define BRCM_SBA_CMD_HAS_RESP		BIT(3)

#define BRCM_SBA_CMD_HAS_OUTPUT		BIT(4)
	
u64 flags;
	
dma_addr_t resp;
	
size_t resp_len;
	
dma_addr_t data;
	
size_t data_len;
};


struct brcm_message {
	
enum brcm_message_type type;
	union {
		struct {
			
struct brcm_message *msgs;
			
unsigned int msgs_queued;
			
unsigned int msgs_count;
		
} batch;
		struct {
			
struct scatterlist *src;
			
struct scatterlist *dst;
		
} spu;
		struct {
			
struct brcm_sba_command *cmds;
			
unsigned int cmds_count;
		
} sba;
	};
	
void *ctx;
	
int error;
};

#endif /* _LINUX_BRCM_MESSAGE_H_ */

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