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
  14 enum 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
  22 struct 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
  38 struct 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_ */