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/*
* 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 __MT76X0U_DMA_H
#define __MT76X0U_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)
/* Tx DMA MCU command specific flags */
#define MT_TXD_CMD_SEQ GENMASK(19, 16)
#define MT_TXD_CMD_TYPE GENMASK(26, 20)
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,
};
static inline int mt76x0_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);
}
static inline int
mt76x0_dma_skb_wrap_pkt(struct sk_buff *skb, enum mt76_qsel qsel, u32 flags)
{
flags |= FIELD_PREP(MT_TXD_PKT_INFO_QSEL, qsel);
return mt76x0_dma_skb_wrap(skb, WLAN_PORT, DMA_PACKET, flags);
}
/* 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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