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_BATCH,
  20         BRCM_MESSAGE_SPU,
  21         BRCM_MESSAGE_SBA,
  22         BRCM_MESSAGE_MAX,
  23 };
  24
  25 struct brcm_sba_command {
  26         u64 cmd;
  27         u64 *cmd_dma;
  28         dma_addr_t cmd_dma_addr;
  29 #define BRCM_SBA_CMD_TYPE_A             BIT(0)
  30 #define BRCM_SBA_CMD_TYPE_B             BIT(1)
  31 #define BRCM_SBA_CMD_TYPE_C             BIT(2)
  32 #define BRCM_SBA_CMD_HAS_RESP           BIT(3)
  33 #define BRCM_SBA_CMD_HAS_OUTPUT         BIT(4)
  34         u64 flags;
  35         dma_addr_t resp;
  36         size_t resp_len;
  37         dma_addr_t data;
  38         size_t data_len;
  39 };
  40
  41 struct brcm_message {
  42         enum brcm_message_type type;
  43         union {
  44                 struct {
  45                         struct brcm_message *msgs;
  46                         unsigned int msgs_queued;
  47                         unsigned int msgs_count;
  48                 } batch;
  49                 struct {
  50                         struct scatterlist *src;
  51                         struct scatterlist *dst;
  52                 } spu;
  53                 struct {
  54                         struct brcm_sba_command *cmds;
  55                         unsigned int cmds_count;
  56                 } sba;
  57         };
  58         void *ctx;
  59         int error;
  60 };
  61
  62 #endif /* _LINUX_BRCM_MESSAGE_H_ */