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45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
/* See the end of this file for copyright, license, and warranty information. */
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#pragma once
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#include <ardix/device.h>
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#include <ardix/kent.h>
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#include <ardix/types.h>
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struct dmabuf {
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struct kent kent;
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size_t len;
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uint8_t data[0];
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};
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#define kent_to_dmabuf(ptr) container_of(ptr, struct dmabuf, kent)
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/**
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* Create a new DMA buffer and its corresponding kent.
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* Use `dmabuf_get` and `dmabuf_put` for refcounting.
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*
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* @param dev: device to create the buffer for
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* @param len: buffer length in bytes
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* @returns a pointer to the buffer, or `NULL` on failure
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*/
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struct dmabuf *dmabuf_create(struct device *dev, size_t len);
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/** Increment a DMA buffer's reference counter. */
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void dmabuf_get(struct dmabuf *buf);
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/** Decrement a DMA buffer's reference counter. */
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void dmabuf_put(struct dmabuf *buf);
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/*
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* This file is part of Ardix.
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* Copyright (c) 2020, 2021 Felix Kopp <owo@fef.moe>.
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*
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* Ardix is non-violent software: you may only use, redistribute,
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* and/or modify it under the terms of the CNPLv6+ as found in
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* the LICENSE file in the source code root directory or at
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* <https://git.pixie.town/thufie/CNPL>.
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*
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* Ardix comes with ABSOLUTELY NO WARRANTY, to the extent
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* permitted by applicable law. See the CNPLv6+ for details.
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*/
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