linux_kernel/drivers/net/wireless/mediatek/mt76/dma.h

/*
 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#ifndef __MT76_DMA_H
#define __MT76_DMA_H

#define MT_RING_SIZE			0x10

#define MT_DMA_CTL_SD_LEN1		GENMASK(13, 0)
#define MT_DMA_CTL_LAST_SEC1		BIT(14)
#define MT_DMA_CTL_BURST		BIT(15)
#define MT_DMA_CTL_SD_LEN0		GENMASK(29, 16)
#define MT_DMA_CTL_LAST_SEC0		BIT(30)
#define MT_DMA_CTL_DMA_DONE		BIT(31)

struct mt76_desc {
	__le32 buf0;
	__le32 ctrl;
	__le32 buf1;
	__le32 info;
} __packed __aligned(4);

int mt76_dma_attach(struct mt76_dev *dev);
void mt76_dma_cleanup(struct mt76_dev *dev);

#endif