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83 lines
2.6 KiB
83 lines
2.6 KiB
7 months ago
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/*
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** Copyright (c) AImotive Kft. 2020
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**
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** The intellectual and technical concepts and implementations contained herein (including
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** data structures, algorithms and essential business logic developed by AImotive Kft.) are
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** proprietary to AImotive Kft., and may be covered by patents, and/or copyright law. This
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** hardware or software is protected by trade secret, confidential business secret and as a
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** general principle must be treated as confidential information.
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**
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** You may not use this hardware or software without specific prior written permission
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** obtained from AImotive Kft.
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**
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** Access to this hardware or software is hereby forbidden to anyone except for Contracted
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** Partners who have prior signed License Agreement, or Confidentiality, Non-Disclosure
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** Agreements or any other equivalent Agreements explicitly covering such access and use.
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**
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** UNLESS OTHERWISE AGREED, THIS HARDWARE OR SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS
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** OR IMPLIED WARRANTIES, INCLUDING - BUT NOT LIMITED TO - THE IMPLIED WARRANTIES OF
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** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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*/
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#ifndef AIWARE_RUNTIME_DEVICE_COMMON_C__HOSTBUFFER_H
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#define AIWARE_RUNTIME_DEVICE_COMMON_C__HOSTBUFFER_H
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#include <stdlib.h>
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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enum HostBufferType
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{
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HBT_INVALID = 0,
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HBT_CONTIGUOUS, // Physically contiguous memory, e.g. hugepage or CMA backed
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HBT_DEVICE, // Device memory mapped into CPU memory space
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HBT_USER, // Userspace memory (e.g. malloc())
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HBT_FD, // DMABUF backed file descriptor
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};
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struct ContiguousMemoryBuffer
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{
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void* virtBase; // virtual memory pointer for CPU access
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void* physBase; // physical address mapped to DMA controller required for DMA transfers
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};
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struct DeviceMemoryBuffer
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{
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void* virtBase; // virtual memory pointer for CPU access, memory mapped
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};
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struct DeviceUserspaceBuffer
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{
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void* virtBase; // virtual memory pointer for CPU access, userspace buffer
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int handle; // driver handle
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size_t offset; // offset to the address imported by the driver
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};
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struct DeviceDMABufBuffer
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{
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int dmaFd; // file descriptor for Linux dmabuf
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};
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struct aiwHostBuffer
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{
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enum HostBufferType type;
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union
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{
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struct ContiguousMemoryBuffer contig;
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struct DeviceMemoryBuffer device;
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struct DeviceUserspaceBuffer user;
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struct DeviceDMABufBuffer dmabuf;
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} d;
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size_t length; // length of the buffer
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};
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#define AIW_HOST_BUFFER_REQUIRES_DMA(buffer) \
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(((buffer)->type == HBT_CONTIGUOUS) || ((buffer)->type == HBT_USER) || ((buffer)->type == HBT_FD))
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#ifdef __cplusplus
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}
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#endif
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#endif
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