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