LXR linux/drivers/net/wireless/mediatek/mt7601u/dma.h

   1/*
   2 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
   3 * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License version 2
   7 * as published by the Free Software Foundation
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 */
  14
  15#ifndef __MT7601U_DMA_H
  16#define __MT7601U_DMA_H
  17
  18#include <asm/unaligned.h>
  19#include <linux/skbuff.h>
  20
  21#define MT_DMA_HDR_LEN                  4
  22#define MT_RX_INFO_LEN                  4
  23#define MT_FCE_INFO_LEN                 4
  24#define MT_DMA_HDRS                     (MT_DMA_HDR_LEN + MT_RX_INFO_LEN)
  25
  26/* Common Tx DMA descriptor fields */
  27#define MT_TXD_INFO_LEN                 GENMASK(15, 0)
  28#define MT_TXD_INFO_D_PORT              GENMASK(29, 27)
  29#define MT_TXD_INFO_TYPE                GENMASK(31, 30)
  30
  31enum mt76_msg_port {
  32        WLAN_PORT,
  33        CPU_RX_PORT,
  34        CPU_TX_PORT,
  35        HOST_PORT,
  36        VIRTUAL_CPU_RX_PORT,
  37        VIRTUAL_CPU_TX_PORT,
  38        DISCARD,
  39};
  40
  41enum mt76_info_type {
  42        DMA_PACKET,
  43        DMA_COMMAND,
  44};
  45
  46/* Tx DMA packet specific flags */
  47#define MT_TXD_PKT_INFO_NEXT_VLD        BIT(16)
  48#define MT_TXD_PKT_INFO_TX_BURST        BIT(17)
  49#define MT_TXD_PKT_INFO_80211           BIT(19)
  50#define MT_TXD_PKT_INFO_TSO             BIT(20)
  51#define MT_TXD_PKT_INFO_CSO             BIT(21)
  52#define MT_TXD_PKT_INFO_WIV             BIT(24)
  53#define MT_TXD_PKT_INFO_QSEL            GENMASK(26, 25)
  54
  55enum mt76_qsel {
  56        MT_QSEL_MGMT,
  57        MT_QSEL_HCCA,
  58        MT_QSEL_EDCA,
  59        MT_QSEL_EDCA_2,
  60};
  61
  62/* Tx DMA MCU command specific flags */
  63#define MT_TXD_CMD_INFO_SEQ             GENMASK(19, 16)
  64#define MT_TXD_CMD_INFO_TYPE            GENMASK(26, 20)
  65
  66static inline int mt7601u_dma_skb_wrap(struct sk_buff *skb,
  67                                       enum mt76_msg_port d_port,
  68                                       enum mt76_info_type type, u32 flags)
  69{
  70        u32 info;
  71
  72        /* Buffer layout:
  73         *      |   4B   | xfer len |      pad       |  4B  |
  74         *      | TXINFO | pkt/cmd  | zero pad to 4B | zero |
  75         *
  76         * length field of TXINFO should be set to 'xfer len'.
  77         */
  78
  79        info = flags |
  80                FIELD_PREP(MT_TXD_INFO_LEN, round_up(skb->len, 4)) |
  81                FIELD_PREP(MT_TXD_INFO_D_PORT, d_port) |
  82                FIELD_PREP(MT_TXD_INFO_TYPE, type);
  83
  84        put_unaligned_le32(info, skb_push(skb, sizeof(info)));
  85        return skb_put_padto(skb, round_up(skb->len, 4) + 4);
  86}
  87
  88static inline int
  89mt7601u_dma_skb_wrap_pkt(struct sk_buff *skb, enum mt76_qsel qsel, u32 flags)
  90{
  91        flags |= FIELD_PREP(MT_TXD_PKT_INFO_QSEL, qsel);
  92        return mt7601u_dma_skb_wrap(skb, WLAN_PORT, DMA_PACKET, flags);
  93}
  94
  95/* Common Rx DMA descriptor fields */
  96#define MT_RXD_INFO_LEN                 GENMASK(13, 0)
  97#define MT_RXD_INFO_PCIE_INTR           BIT(24)
  98#define MT_RXD_INFO_QSEL                GENMASK(26, 25)
  99#define MT_RXD_INFO_PORT                GENMASK(29, 27)
 100#define MT_RXD_INFO_TYPE                GENMASK(31, 30)
 101
 102/* Rx DMA packet specific flags */
 103#define MT_RXD_PKT_INFO_UDP_ERR         BIT(16)
 104#define MT_RXD_PKT_INFO_TCP_ERR         BIT(17)
 105#define MT_RXD_PKT_INFO_IP_ERR          BIT(18)
 106#define MT_RXD_PKT_INFO_PKT_80211       BIT(19)
 107#define MT_RXD_PKT_INFO_L3L4_DONE       BIT(20)
 108#define MT_RXD_PKT_INFO_MAC_LEN         GENMASK(23, 21)
 109
 110/* Rx DMA MCU command specific flags */
 111#define MT_RXD_CMD_INFO_SELF_GEN        BIT(15)
 112#define MT_RXD_CMD_INFO_CMD_SEQ         GENMASK(19, 16)
 113#define MT_RXD_CMD_INFO_EVT_TYPE        GENMASK(23, 20)
 114
 115enum mt76_evt_type {
 116        CMD_DONE,
 117        CMD_ERROR,
 118        CMD_RETRY,
 119        EVENT_PWR_RSP,
 120        EVENT_WOW_RSP,
 121        EVENT_CARRIER_DETECT_RSP,
 122        EVENT_DFS_DETECT_RSP,
 123};
 124
 125#endif
 126