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50 lines
1.6 KiB
C
50 lines
1.6 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 <arch/arch_include.h>
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#include <ardix/dma.h>
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#include <ardix/serial.h>
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int arch_serial_init(struct serial_device *dev);
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void arch_serial_exit(struct serial_device *dev);
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/**
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* Copy `buf` to a hardware buffer in the TX queue.
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* The transmission is performed asynchronously.
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*
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* @param dev: serial device to enqueue the buffer for
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* @param buf: raw buffer data
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* @param len: length of `buf`
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* @returns actual amount of bytes enqueued, or a negative error code on failure
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*/
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ssize_t arch_serial_write(struct serial_device *dev, const void *buf, size_t len);
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/**
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* Directly enqueue a DMA buffer to a serial device, resulting in a zero-copy
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* write. This will increment the buffer's refcount and decrement it again when
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* it has been written out completely, so the caller is responsible for calling
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* `dmabuf_put` as well in order to prevent a memory leak.
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*
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* @param dev: serial device to write to
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* @param buf: raw DMA buffer to append
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* @returns actual bytes that will be written, or a negative error code
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*/
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ssize_t serial_write_dma(struct serial_device *dev, struct dmabuf *buf);
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#include ARCH_INCLUDE(serial.h)
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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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