1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org> 4 * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl> 5 */ 6 7 #ifndef __MT7601U_DMA_H 8 #define __MT7601U_DMA_H 9 10 #include <linux/unaligned.h> 11 #include <linux/skbuff.h> 12 13 #define MT_DMA_HDR_LEN 4 14 #define MT_RX_INFO_LEN 4 15 #define MT_FCE_INFO_LEN 4 16 #define MT_DMA_HDRS (MT_DMA_HDR_LEN + MT_RX_INFO_LEN) 17 18 /* Common Tx DMA descriptor fields */ 19 #define MT_TXD_INFO_LEN GENMASK(15, 0) 20 #define MT_TXD_INFO_D_PORT GENMASK(29, 27) 21 #define MT_TXD_INFO_TYPE GENMASK(31, 30) 22 23 enum mt76_msg_port { 24 WLAN_PORT, 25 CPU_RX_PORT, 26 CPU_TX_PORT, 27 HOST_PORT, 28 VIRTUAL_CPU_RX_PORT, 29 VIRTUAL_CPU_TX_PORT, 30 DISCARD, 31 }; 32 33 enum mt76_info_type { 34 DMA_PACKET, 35 DMA_COMMAND, 36 }; 37 38 /* Tx DMA packet specific flags */ 39 #define MT_TXD_PKT_INFO_NEXT_VLD BIT(16) 40 #define MT_TXD_PKT_INFO_TX_BURST BIT(17) 41 #define MT_TXD_PKT_INFO_80211 BIT(19) 42 #define MT_TXD_PKT_INFO_TSO BIT(20) 43 #define MT_TXD_PKT_INFO_CSO BIT(21) 44 #define MT_TXD_PKT_INFO_WIV BIT(24) 45 #define MT_TXD_PKT_INFO_QSEL GENMASK(26, 25) 46 47 enum mt76_qsel { 48 MT_QSEL_MGMT, 49 MT_QSEL_HCCA, 50 MT_QSEL_EDCA, 51 MT_QSEL_EDCA_2, 52 }; 53 54 /* Tx DMA MCU command specific flags */ 55 #define MT_TXD_CMD_INFO_SEQ GENMASK(19, 16) 56 #define MT_TXD_CMD_INFO_TYPE GENMASK(26, 20) 57 58 static inline int mt7601u_dma_skb_wrap(struct sk_buff *skb, 59 enum mt76_msg_port d_port, 60 enum mt76_info_type type, u32 flags) 61 { 62 u32 info; 63 64 /* Buffer layout: 65 * | 4B | xfer len | pad | 4B | 66 * | TXINFO | pkt/cmd | zero pad to 4B | zero | 67 * 68 * length field of TXINFO should be set to 'xfer len'. 69 */ 70 71 info = flags | 72 FIELD_PREP(MT_TXD_INFO_LEN, round_up(skb->len, 4)) | 73 FIELD_PREP(MT_TXD_INFO_D_PORT, d_port) | 74 FIELD_PREP(MT_TXD_INFO_TYPE, type); 75 76 put_unaligned_le32(info, skb_push(skb, sizeof(info))); 77 return skb_put_padto(skb, round_up(skb->len, 4) + 4); 78 } 79 80 static inline int 81 mt7601u_dma_skb_wrap_pkt(struct sk_buff *skb, enum mt76_qsel qsel, u32 flags) 82 { 83 flags |= FIELD_PREP(MT_TXD_PKT_INFO_QSEL, qsel); 84 return mt7601u_dma_skb_wrap(skb, WLAN_PORT, DMA_PACKET, flags); 85 } 86 87 /* Common Rx DMA descriptor fields */ 88 #define MT_RXD_INFO_LEN GENMASK(13, 0) 89 #define MT_RXD_INFO_PCIE_INTR BIT(24) 90 #define MT_RXD_INFO_QSEL GENMASK(26, 25) 91 #define MT_RXD_INFO_PORT GENMASK(29, 27) 92 #define MT_RXD_INFO_TYPE GENMASK(31, 30) 93 94 /* Rx DMA packet specific flags */ 95 #define MT_RXD_PKT_INFO_UDP_ERR BIT(16) 96 #define MT_RXD_PKT_INFO_TCP_ERR BIT(17) 97 #define MT_RXD_PKT_INFO_IP_ERR BIT(18) 98 #define MT_RXD_PKT_INFO_PKT_80211 BIT(19) 99 #define MT_RXD_PKT_INFO_L3L4_DONE BIT(20) 100 #define MT_RXD_PKT_INFO_MAC_LEN GENMASK(23, 21) 101 102 /* Rx DMA MCU command specific flags */ 103 #define MT_RXD_CMD_INFO_SELF_GEN BIT(15) 104 #define MT_RXD_CMD_INFO_CMD_SEQ GENMASK(19, 16) 105 #define MT_RXD_CMD_INFO_EVT_TYPE GENMASK(23, 20) 106 107 enum mt76_evt_type { 108 CMD_DONE, 109 CMD_ERROR, 110 CMD_RETRY, 111 EVENT_PWR_RSP, 112 EVENT_WOW_RSP, 113 EVENT_CARRIER_DETECT_RSP, 114 EVENT_DFS_DETECT_RSP, 115 }; 116 117 #endif 118