LXR linux/include/linux/mailbox/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_ */
  60