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c869f77d JK |
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 | ||
c869f77d JK |
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 | ||
31 | enum 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 | ||
41 | enum 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 | ||
55 | enum 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 | ||
66 | static 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 | | |
d43af505 JK |
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); | |
c869f77d JK |
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 | ||
88 | static inline int | |
89 | mt7601u_dma_skb_wrap_pkt(struct sk_buff *skb, enum mt76_qsel qsel, u32 flags) | |
90 | { | |
d43af505 | 91 | flags |= FIELD_PREP(MT_TXD_PKT_INFO_QSEL, qsel); |
c869f77d JK |
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 | ||
115 | enum 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 |