Release 4.11 drivers/net/wireless/mediatek/mt7601u/dma.h

/*
 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
 * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#ifndef __MT7601U_DMA_H

#define __MT7601U_DMA_H

#include <asm/unaligned.h>
#include <linux/skbuff.h>


#define MT_DMA_HDR_LEN			4

#define MT_RX_INFO_LEN			4

#define MT_FCE_INFO_LEN			4

#define MT_DMA_HDRS			(MT_DMA_HDR_LEN + MT_RX_INFO_LEN)

/* Common Tx DMA descriptor fields */

#define MT_TXD_INFO_LEN			GENMASK(15, 0)

#define MT_TXD_INFO_D_PORT		GENMASK(29, 27)

#define MT_TXD_INFO_TYPE		GENMASK(31, 30)


enum mt76_msg_port {
	
WLAN_PORT,
	
CPU_RX_PORT,
	
CPU_TX_PORT,
	
HOST_PORT,
	
VIRTUAL_CPU_RX_PORT,
	
VIRTUAL_CPU_TX_PORT,
	
DISCARD,
};


enum mt76_info_type {
	
DMA_PACKET,
	
DMA_COMMAND,
};

/* Tx DMA packet specific flags */

#define MT_TXD_PKT_INFO_NEXT_VLD	BIT(16)

#define MT_TXD_PKT_INFO_TX_BURST	BIT(17)

#define MT_TXD_PKT_INFO_80211		BIT(19)

#define MT_TXD_PKT_INFO_TSO		BIT(20)

#define MT_TXD_PKT_INFO_CSO		BIT(21)

#define MT_TXD_PKT_INFO_WIV		BIT(24)

#define MT_TXD_PKT_INFO_QSEL		GENMASK(26, 25)


enum mt76_qsel {
	
MT_QSEL_MGMT,
	
MT_QSEL_HCCA,
	
MT_QSEL_EDCA,
	
MT_QSEL_EDCA_2,
};

/* Tx DMA MCU command specific flags */

#define MT_TXD_CMD_INFO_SEQ		GENMASK(19, 16)

#define MT_TXD_CMD_INFO_TYPE		GENMASK(26, 20)



static inline int mt7601u_dma_skb_wrap(struct sk_buff *skb,
				       enum mt76_msg_port d_port,
				       enum mt76_info_type type, u32 flags)
{
	u32 info;

	/* Buffer layout:
         *      |   4B   | xfer len |      pad       |  4B  |
         *      | TXINFO | pkt/cmd  | zero pad to 4B | zero |
         *
         * length field of TXINFO should be set to 'xfer len'.
         */

	info = flags |
		FIELD_PREP(MT_TXD_INFO_LEN, round_up(skb->len, 4)) |
		FIELD_PREP(MT_TXD_INFO_D_PORT, d_port) |
		FIELD_PREP(MT_TXD_INFO_TYPE, type);

	put_unaligned_le32(info, skb_push(skb, sizeof(info)));
	return skb_put_padto(skb, round_up(skb->len, 4) + 4);
}

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static inline int

mt7601u_dma_skb_wrap_pkt(struct sk_buff *skb, enum mt76_qsel qsel, u32 flags)
{
	flags |= FIELD_PREP(MT_TXD_PKT_INFO_QSEL, qsel);
	return mt7601u_dma_skb_wrap(skb, WLAN_PORT, DMA_PACKET, flags);
}

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/* Common Rx DMA descriptor fields */

#define MT_RXD_INFO_LEN			GENMASK(13, 0)

#define MT_RXD_INFO_PCIE_INTR		BIT(24)

#define MT_RXD_INFO_QSEL		GENMASK(26, 25)

#define MT_RXD_INFO_PORT		GENMASK(29, 27)

#define MT_RXD_INFO_TYPE		GENMASK(31, 30)

/* Rx DMA packet specific flags */

#define MT_RXD_PKT_INFO_UDP_ERR		BIT(16)

#define MT_RXD_PKT_INFO_TCP_ERR		BIT(17)

#define MT_RXD_PKT_INFO_IP_ERR		BIT(18)

#define MT_RXD_PKT_INFO_PKT_80211	BIT(19)

#define MT_RXD_PKT_INFO_L3L4_DONE	BIT(20)

#define MT_RXD_PKT_INFO_MAC_LEN		GENMASK(23, 21)

/* Rx DMA MCU command specific flags */

#define MT_RXD_CMD_INFO_SELF_GEN	BIT(15)

#define MT_RXD_CMD_INFO_CMD_SEQ		GENMASK(19, 16)

#define MT_RXD_CMD_INFO_EVT_TYPE	GENMASK(23, 20)


enum mt76_evt_type {
	
CMD_DONE,
	
CMD_ERROR,
	
CMD_RETRY,
	
EVENT_PWR_RSP,
	
EVENT_WOW_RSP,
	
EVENT_CARRIER_DETECT_RSP,
	
EVENT_DFS_DETECT_RSP,
};

#endif
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Directory: drivers/net/wireless/mediatek/mt7601u

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