/*
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* Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
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* Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __MT7601U_DMA_H
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#define __MT7601U_DMA_H
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#include <asm/unaligned.h>
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#include <linux/skbuff.h>
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#include "util.h"
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#define MT_DMA_HDR_LEN 4
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#define MT_RX_INFO_LEN 4
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#define MT_FCE_INFO_LEN 4
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#define MT_DMA_HDRS (MT_DMA_HDR_LEN + MT_RX_INFO_LEN)
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/* Common Tx DMA descriptor fields */
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#define MT_TXD_INFO_LEN GENMASK(15, 0)
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#define MT_TXD_INFO_D_PORT GENMASK(29, 27)
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#define MT_TXD_INFO_TYPE GENMASK(31, 30)
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enum mt76_msg_port {
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WLAN_PORT,
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CPU_RX_PORT,
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CPU_TX_PORT,
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HOST_PORT,
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VIRTUAL_CPU_RX_PORT,
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VIRTUAL_CPU_TX_PORT,
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DISCARD,
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};
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enum mt76_info_type {
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DMA_PACKET,
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DMA_COMMAND,
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};
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/* Tx DMA packet specific flags */
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#define MT_TXD_PKT_INFO_NEXT_VLD BIT(16)
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#define MT_TXD_PKT_INFO_TX_BURST BIT(17)
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#define MT_TXD_PKT_INFO_80211 BIT(19)
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#define MT_TXD_PKT_INFO_TSO BIT(20)
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#define MT_TXD_PKT_INFO_CSO BIT(21)
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#define MT_TXD_PKT_INFO_WIV BIT(24)
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#define MT_TXD_PKT_INFO_QSEL GENMASK(26, 25)
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enum mt76_qsel {
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MT_QSEL_MGMT,
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MT_QSEL_HCCA,
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MT_QSEL_EDCA,
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MT_QSEL_EDCA_2,
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};
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/* Tx DMA MCU command specific flags */
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#define MT_TXD_CMD_INFO_SEQ GENMASK(19, 16)
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#define MT_TXD_CMD_INFO_TYPE GENMASK(26, 20)
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static inline int mt7601u_dma_skb_wrap(struct sk_buff *skb,
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enum mt76_msg_port d_port,
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enum mt76_info_type type, u32 flags)
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{
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u32 info;
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/* Buffer layout:
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* | 4B | xfer len | pad | 4B |
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* | TXINFO | pkt/cmd | zero pad to 4B | zero |
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*
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* length field of TXINFO should be set to 'xfer len'.
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*/
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info = flags |
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MT76_SET(MT_TXD_INFO_LEN, round_up(skb->len, 4)) |
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MT76_SET(MT_TXD_INFO_D_PORT, d_port) |
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MT76_SET(MT_TXD_INFO_TYPE, type);
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put_unaligned_le32(info, skb_push(skb, sizeof(info)));
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return skb_put_padto(skb, round_up(skb->len, 4) + 4);
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}
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static inline int
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mt7601u_dma_skb_wrap_pkt(struct sk_buff *skb, enum mt76_qsel qsel, u32 flags)
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{
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flags |= MT76_SET(MT_TXD_PKT_INFO_QSEL, qsel);
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return mt7601u_dma_skb_wrap(skb, WLAN_PORT, DMA_PACKET, flags);
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}
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/* Common Rx DMA descriptor fields */
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#define MT_RXD_INFO_LEN GENMASK(13, 0)
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#define MT_RXD_INFO_PCIE_INTR BIT(24)
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#define MT_RXD_INFO_QSEL GENMASK(26, 25)
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#define MT_RXD_INFO_PORT GENMASK(29, 27)
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#define MT_RXD_INFO_TYPE GENMASK(31, 30)
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/* Rx DMA packet specific flags */
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#define MT_RXD_PKT_INFO_UDP_ERR BIT(16)
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#define MT_RXD_PKT_INFO_TCP_ERR BIT(17)
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#define MT_RXD_PKT_INFO_IP_ERR BIT(18)
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#define MT_RXD_PKT_INFO_PKT_80211 BIT(19)
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#define MT_RXD_PKT_INFO_L3L4_DONE BIT(20)
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#define MT_RXD_PKT_INFO_MAC_LEN GENMASK(23, 21)
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/* Rx DMA MCU command specific flags */
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#define MT_RXD_CMD_INFO_SELF_GEN BIT(15)
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#define MT_RXD_CMD_INFO_CMD_SEQ GENMASK(19, 16)
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#define MT_RXD_CMD_INFO_EVT_TYPE GENMASK(23, 20)
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enum mt76_evt_type {
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CMD_DONE,
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CMD_ERROR,
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CMD_RETRY,
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EVENT_PWR_RSP,
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EVENT_WOW_RSP,
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EVENT_CARRIER_DETECT_RSP,
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EVENT_DFS_DETECT_RSP,
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};
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#endif
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