drivers/staging/vc04_services/include/linux/broadcom/vc_sm_cma_ioctl.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 /*
   4  * Copyright 2019 Raspberry Pi (Trading) Ltd.  All rights reserved.
   5  *
   6  * Based on vmcs_sm_ioctl.h Copyright Broadcom Corporation.
   7  */
   8
   9 #ifndef __VC_SM_CMA_IOCTL_H
  10 #define __VC_SM_CMA_IOCTL_H
  11
  12 /* ---- Include Files ---------------------------------------------------- */
  13
  14 #if defined(__KERNEL__)
  15 #include <linux/types.h>        /* Needed for standard types */
  16 #else
  17 #include <stdint.h>
  18 #endif
  19
  20 #include <linux/ioctl.h>
  21
  22 /* ---- Constants and Types ---------------------------------------------- */
  23
  24 #define VC_SM_CMA_RESOURCE_NAME               32
  25 #define VC_SM_CMA_RESOURCE_NAME_DEFAULT       "sm-host-resource"
  26
  27 /* Type define used to create unique IOCTL number */
  28 #define VC_SM_CMA_MAGIC_TYPE                  'J'
  29
  30 /* IOCTL commands on /dev/vc-sm-cma */
  31 enum vc_sm_cma_cmd_e {
  32         VC_SM_CMA_CMD_ALLOC = 0x5A,     /* Start at 0x5A arbitrarily */
  33
  34         VC_SM_CMA_CMD_IMPORT_DMABUF,
  35
  36         VC_SM_CMA_CMD_CLEAN_INVALID2,
  37
  38         VC_SM_CMA_CMD_LAST      /* Do not delete */
  39 };
  40
  41 /* Cache type supported, conveniently matches the user space definition in
  42  * user-vcsm.h.
  43  */
  44 enum vc_sm_cma_cache_e {
  45         VC_SM_CMA_CACHE_NONE,
  46         VC_SM_CMA_CACHE_HOST,
  47         VC_SM_CMA_CACHE_VC,
  48         VC_SM_CMA_CACHE_BOTH,
  49 };
  50
  51 /* IOCTL Data structures */
  52 struct vc_sm_cma_ioctl_alloc {
  53         /* user -> kernel */
  54         __u32 size;
  55         __u32 num;
  56         __u32 cached;           /* enum vc_sm_cma_cache_e */
  57         __u32 pad;
  58         __u8 name[VC_SM_CMA_RESOURCE_NAME];
  59
  60         /* kernel -> user */
  61         __s32 handle;
  62         __u32 vc_handle;
  63         __u64 dma_addr;
  64 };
  65
  66 struct vc_sm_cma_ioctl_import_dmabuf {
  67         /* user -> kernel */
  68         __s32 dmabuf_fd;
  69         __u32 cached;           /* enum vc_sm_cma_cache_e */
  70         __u8 name[VC_SM_CMA_RESOURCE_NAME];
  71
  72         /* kernel -> user */
  73         __s32 handle;
  74         __u32 vc_handle;
  75         __u32 size;
  76         __u32 pad;
  77         __u64 dma_addr;
  78 };
  79
  80 /*
  81  * Cache functions to be set to struct vc_sm_cma_ioctl_clean_invalid2
  82  * invalidate_mode.
  83  */
  84 #define VC_SM_CACHE_OP_NOP       0x00
  85 #define VC_SM_CACHE_OP_INV       0x01
  86 #define VC_SM_CACHE_OP_CLEAN     0x02
  87 #define VC_SM_CACHE_OP_FLUSH     0x03
  88
  89 struct vc_sm_cma_ioctl_clean_invalid2 {
  90         __u32 op_count;
  91         __u32 pad;
  92         struct vc_sm_cma_ioctl_clean_invalid_block {
  93                 __u32 invalidate_mode;
  94                 __u32 block_count;
  95                 void *  __user start_address;
  96                 __u32 block_size;
  97                 __u32 inter_block_stride;
  98         } s[0];
  99 };
 100
 101 /* IOCTL numbers */
 102 #define VC_SM_CMA_IOCTL_MEM_ALLOC\
 103         _IOR(VC_SM_CMA_MAGIC_TYPE, VC_SM_CMA_CMD_ALLOC,\
 104          struct vc_sm_cma_ioctl_alloc)
 105
 106 #define VC_SM_CMA_IOCTL_MEM_IMPORT_DMABUF\
 107         _IOR(VC_SM_CMA_MAGIC_TYPE, VC_SM_CMA_CMD_IMPORT_DMABUF,\
 108          struct vc_sm_cma_ioctl_import_dmabuf)
 109
 110 #define VC_SM_CMA_IOCTL_MEM_CLEAN_INVALID2\
 111         _IOR(VC_SM_CMA_MAGIC_TYPE, VC_SM_CMA_CMD_CLEAN_INVALID2,\
 112          struct vc_sm_cma_ioctl_clean_invalid2)
 113
 114 #endif /* __VC_SM_CMA_IOCTL_H */