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u-dma-buf-ioctl.h
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/*********************************************************************************
*
* Copyright (C) 2015-2024 Ichiro Kawazome
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
********************************************************************************/
#ifndef U_DMA_BUF_IOCTL_H
#define U_DMA_BUF_IOCTL_H
#include <linux/ioctl.h>
#define DEFINE_U_DMA_BUF_IOCTL_FLAGS(name,type,lo,hi) \
static const int U_DMA_BUF_IOCTL_FLAGS_ ## name ## _SHIFT = (lo); \
static const uint64_t U_DMA_BUF_IOCTL_FLAGS_ ## name ## _MASK = (((uint64_t)1UL << ((hi)-(lo)+1))-1); \
static inline void SET_U_DMA_BUF_IOCTL_FLAGS_ ## name(type *p, int value) \
{ \
const int shift = U_DMA_BUF_IOCTL_FLAGS_ ## name ## _SHIFT; \
const uint64_t mask = U_DMA_BUF_IOCTL_FLAGS_ ## name ## _MASK; \
p->flags &= ~(mask << shift); \
p->flags |= ((value & mask) << shift); \
} \
static inline int GET_U_DMA_BUF_IOCTL_FLAGS_ ## name(type *p) \
{ \
const int shift = U_DMA_BUF_IOCTL_FLAGS_ ## name ## _SHIFT; \
const uint64_t mask = U_DMA_BUF_IOCTL_FLAGS_ ## name ## _MASK; \
return (int)((p->flags >> shift) & mask); \
}
typedef struct {
uint64_t flags;
char version[16];
} u_dma_buf_ioctl_drv_info;
DEFINE_U_DMA_BUF_IOCTL_FLAGS(IOCTL_VERSION , u_dma_buf_ioctl_drv_info , 0, 7)
DEFINE_U_DMA_BUF_IOCTL_FLAGS(IN_KERNEL_FUNCTIONS, u_dma_buf_ioctl_drv_info , 8, 8)
DEFINE_U_DMA_BUF_IOCTL_FLAGS(USE_OF_DMA_CONFIG , u_dma_buf_ioctl_drv_info , 12, 12)
DEFINE_U_DMA_BUF_IOCTL_FLAGS(USE_OF_RESERVED_MEM, u_dma_buf_ioctl_drv_info , 13, 13)
DEFINE_U_DMA_BUF_IOCTL_FLAGS(USE_QUIRK_MMAP , u_dma_buf_ioctl_drv_info , 16, 16)
DEFINE_U_DMA_BUF_IOCTL_FLAGS(USE_QUIRK_MMAP_PAGE, u_dma_buf_ioctl_drv_info , 17, 17)
typedef struct {
uint64_t flags;
uint64_t size;
uint64_t addr;
} u_dma_buf_ioctl_dev_info;
DEFINE_U_DMA_BUF_IOCTL_FLAGS(DMA_MASK , u_dma_buf_ioctl_dev_info , 0, 7)
DEFINE_U_DMA_BUF_IOCTL_FLAGS(DMA_COHERENT, u_dma_buf_ioctl_dev_info , 9, 9)
DEFINE_U_DMA_BUF_IOCTL_FLAGS(MMAP_MODE , u_dma_buf_ioctl_dev_info , 10, 12)
typedef struct {
uint64_t flags;
uint64_t size;
uint64_t offset;
} u_dma_buf_ioctl_sync_args;
DEFINE_U_DMA_BUF_IOCTL_FLAGS(SYNC_CMD , u_dma_buf_ioctl_sync_args, 0, 1)
DEFINE_U_DMA_BUF_IOCTL_FLAGS(SYNC_DIR , u_dma_buf_ioctl_sync_args, 2, 3)
DEFINE_U_DMA_BUF_IOCTL_FLAGS(SYNC_MODE , u_dma_buf_ioctl_sync_args, 8, 15)
DEFINE_U_DMA_BUF_IOCTL_FLAGS(SYNC_OWNER , u_dma_buf_ioctl_sync_args, 16, 16)
enum {
U_DMA_BUF_IOCTL_FLAGS_SYNC_CMD_FOR_CPU = 1,
U_DMA_BUF_IOCTL_FLAGS_SYNC_CMD_FOR_DEVICE = 3
};
typedef struct {
uint64_t flags;
uint64_t size;
uint64_t offset;
uint64_t addr;
int fd;
} u_dma_buf_ioctl_export_args;
DEFINE_U_DMA_BUF_IOCTL_FLAGS(EXPORT_FD_FLAGS, u_dma_buf_ioctl_export_args, 0, 31)
#define U_DMA_BUF_IOCTL_MAGIC 'U'
#define U_DMA_BUF_IOCTL_GET_DRV_INFO _IOR (U_DMA_BUF_IOCTL_MAGIC, 1, u_dma_buf_ioctl_drv_info)
#define U_DMA_BUF_IOCTL_GET_SIZE _IOR (U_DMA_BUF_IOCTL_MAGIC, 2, uint64_t)
#define U_DMA_BUF_IOCTL_GET_DMA_ADDR _IOR (U_DMA_BUF_IOCTL_MAGIC, 3, uint64_t)
#define U_DMA_BUF_IOCTL_GET_SYNC_OWNER _IOR (U_DMA_BUF_IOCTL_MAGIC, 4, uint32_t)
#define U_DMA_BUF_IOCTL_SET_SYNC_FOR_CPU _IOW (U_DMA_BUF_IOCTL_MAGIC, 5, uint64_t)
#define U_DMA_BUF_IOCTL_SET_SYNC_FOR_DEVICE _IOW (U_DMA_BUF_IOCTL_MAGIC, 6, uint64_t)
#define U_DMA_BUF_IOCTL_GET_DEV_INFO _IOR (U_DMA_BUF_IOCTL_MAGIC, 7, u_dma_buf_ioctl_dev_info)
#define U_DMA_BUF_IOCTL_GET_SYNC _IOR (U_DMA_BUF_IOCTL_MAGIC, 8, u_dma_buf_ioctl_sync_args)
#define U_DMA_BUF_IOCTL_SET_SYNC _IOW (U_DMA_BUF_IOCTL_MAGIC, 9, u_dma_buf_ioctl_sync_args)
#define U_DMA_BUF_IOCTL_EXPORT _IOWR(U_DMA_BUF_IOCTL_MAGIC,10, u_dma_buf_ioctl_export_args)
#endif /* #ifndef U_DMA_BUF_IOCTL_H */