include/linux/mailbox/brcm-message.h

   1 /*
   2  *  Copyright (C) 2016 Broadcom
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  * Common header for Broadcom mailbox messages which is shared across
   9  * Broadcom SoCs and Broadcom mailbox client drivers.
  10  */
  11
  12 #ifndef _LINUX_BRCM_MESSAGE_H_
  13 #define _LINUX_BRCM_MESSAGE_H_
  14
  15 #include <linux/scatterlist.h>
  16
  17 enum brcm_message_type {
  18         BRCM_MESSAGE_UNKNOWN = 0,
  19         BRCM_MESSAGE_SPU,
  20         BRCM_MESSAGE_SBA,
  21         BRCM_MESSAGE_MAX,
  22 };
  23
  24 struct brcm_sba_command {
  25         u64 cmd;
  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 input;
  33         size_t input_len;
  34         dma_addr_t resp;
  35         size_t resp_len;
  36         dma_addr_t output;
  37         size_t output_len;
  38 };
  39
  40 struct brcm_message {
  41         enum brcm_message_type type;
  42         union {
  43                 struct {
  44                         struct scatterlist *src;
  45                         struct scatterlist *dst;
  46                 } spu;
  47                 struct {
  48                         struct brcm_sba_command *cmds;
  49                         unsigned int cmds_count;
  50                 } sba;
  51         };
  52         void *ctx;
  53         int error;
  54 };
  55
  56 #endif /* _LINUX_BRCM_MESSAGE_H_ */