1 // SPDX-License-Identifier: ISC
2 /* Copyright (C) 2023 MediaTek Inc. */
3
4 #include "mt76_connac.h"
5 #include "mt76_connac3_mac.h"
6 #include "dma.h"
7
8 #define HE_BITS(f) cpu_to_le16(IEEE80211_RADIOTAP_HE_##f)
9 #define EHT_BITS(f) cpu_to_le32(IEEE80211_RADIOTAP_EHT_##f)
10 #define HE_PREP(f, m, v) le16_encode_bits(le32_get_bits(v, MT_CRXV_HE_##m),\
11 IEEE80211_RADIOTAP_HE_##f)
12 #define EHT_PREP(f, m, v) le32_encode_bits(le32_get_bits(v, MT_CRXV_EHT_##m),\
13 IEEE80211_RADIOTAP_EHT_##f)
14
15 static void
mt76_connac3_mac_decode_he_radiotap_ru(struct mt76_rx_status * status,struct ieee80211_radiotap_he * he,__le32 * rxv)16 mt76_connac3_mac_decode_he_radiotap_ru(struct mt76_rx_status *status,
17 struct ieee80211_radiotap_he *he,
18 __le32 *rxv)
19 {
20 u32 ru = le32_get_bits(rxv[0], MT_PRXV_HE_RU_ALLOC), offs = 0;
21
22 status->bw = RATE_INFO_BW_HE_RU;
23
24 switch (ru) {
25 case 0 ... 36:
26 status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_26;
27 offs = ru;
28 break;
29 case 37 ... 52:
30 status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_52;
31 offs = ru - 37;
32 break;
33 case 53 ... 60:
34 status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106;
35 offs = ru - 53;
36 break;
37 case 61 ... 64:
38 status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_242;
39 offs = ru - 61;
40 break;
41 case 65 ... 66:
42 status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_484;
43 offs = ru - 65;
44 break;
45 case 67:
46 status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_996;
47 break;
48 case 68:
49 status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_2x996;
50 break;
51 }
52
53 he->data1 |= HE_BITS(DATA1_BW_RU_ALLOC_KNOWN);
54 he->data2 |= HE_BITS(DATA2_RU_OFFSET_KNOWN) |
55 le16_encode_bits(offs,
56 IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET);
57 }
58
59 #define MU_PREP(f, v) le16_encode_bits(v, IEEE80211_RADIOTAP_HE_MU_##f)
60 static void
mt76_connac3_mac_decode_he_mu_radiotap(struct sk_buff * skb,__le32 * rxv)61 mt76_connac3_mac_decode_he_mu_radiotap(struct sk_buff *skb, __le32 *rxv)
62 {
63 struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
64 static const struct ieee80211_radiotap_he_mu mu_known = {
65 .flags1 = HE_BITS(MU_FLAGS1_SIG_B_MCS_KNOWN) |
66 HE_BITS(MU_FLAGS1_SIG_B_DCM_KNOWN) |
67 HE_BITS(MU_FLAGS1_CH1_RU_KNOWN) |
68 HE_BITS(MU_FLAGS1_SIG_B_SYMS_USERS_KNOWN),
69 .flags2 = HE_BITS(MU_FLAGS2_BW_FROM_SIG_A_BW_KNOWN),
70 };
71 struct ieee80211_radiotap_he_mu *he_mu;
72
73 status->flag |= RX_FLAG_RADIOTAP_HE_MU;
74
75 he_mu = skb_push(skb, sizeof(mu_known));
76 memcpy(he_mu, &mu_known, sizeof(mu_known));
77
78 he_mu->flags1 |= MU_PREP(FLAGS1_SIG_B_MCS, status->rate_idx);
79 if (status->he_dcm)
80 he_mu->flags1 |= MU_PREP(FLAGS1_SIG_B_DCM, status->he_dcm);
81
82 he_mu->flags2 |= MU_PREP(FLAGS2_BW_FROM_SIG_A_BW, status->bw) |
83 MU_PREP(FLAGS2_SIG_B_SYMS_USERS,
84 le32_get_bits(rxv[4], MT_CRXV_HE_NUM_USER));
85
86 he_mu->ru_ch1[0] = le32_get_bits(rxv[16], MT_CRXV_HE_RU0) & 0xff;
87
88 if (status->bw >= RATE_INFO_BW_40) {
89 he_mu->flags1 |= HE_BITS(MU_FLAGS1_CH2_RU_KNOWN);
90 he_mu->ru_ch2[0] = le32_get_bits(rxv[16], MT_CRXV_HE_RU1) & 0xff;
91 }
92
93 if (status->bw >= RATE_INFO_BW_80) {
94 u32 ru_h, ru_l;
95
96 he_mu->ru_ch1[1] = le32_get_bits(rxv[16], MT_CRXV_HE_RU2) & 0xff;
97
98 ru_l = le32_get_bits(rxv[16], MT_CRXV_HE_RU3_L);
99 ru_h = le32_get_bits(rxv[17], MT_CRXV_HE_RU3_H) & 0x7;
100 he_mu->ru_ch2[1] = (u8)(ru_l | ru_h << 4);
101 }
102 }
103
mt76_connac3_mac_decode_he_radiotap(struct sk_buff * skb,__le32 * rxv,u8 mode)104 void mt76_connac3_mac_decode_he_radiotap(struct sk_buff *skb, __le32 *rxv,
105 u8 mode)
106 {
107 struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
108 static const struct ieee80211_radiotap_he known = {
109 .data1 = HE_BITS(DATA1_DATA_MCS_KNOWN) |
110 HE_BITS(DATA1_DATA_DCM_KNOWN) |
111 HE_BITS(DATA1_STBC_KNOWN) |
112 HE_BITS(DATA1_CODING_KNOWN) |
113 HE_BITS(DATA1_LDPC_XSYMSEG_KNOWN) |
114 HE_BITS(DATA1_DOPPLER_KNOWN) |
115 HE_BITS(DATA1_SPTL_REUSE_KNOWN) |
116 HE_BITS(DATA1_BSS_COLOR_KNOWN),
117 .data2 = HE_BITS(DATA2_GI_KNOWN) |
118 HE_BITS(DATA2_TXBF_KNOWN) |
119 HE_BITS(DATA2_PE_DISAMBIG_KNOWN) |
120 HE_BITS(DATA2_TXOP_KNOWN),
121 };
122 u32 ltf_size = le32_get_bits(rxv[4], MT_CRXV_HE_LTF_SIZE) + 1;
123 struct ieee80211_radiotap_he *he;
124
125 status->flag |= RX_FLAG_RADIOTAP_HE;
126
127 he = skb_push(skb, sizeof(known));
128 memcpy(he, &known, sizeof(known));
129
130 he->data3 = HE_PREP(DATA3_BSS_COLOR, BSS_COLOR, rxv[9]) |
131 HE_PREP(DATA3_LDPC_XSYMSEG, LDPC_EXT_SYM, rxv[4]);
132 he->data4 = HE_PREP(DATA4_SU_MU_SPTL_REUSE, SR_MASK, rxv[13]);
133 he->data5 = HE_PREP(DATA5_PE_DISAMBIG, PE_DISAMBIG, rxv[5]) |
134 le16_encode_bits(ltf_size,
135 IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE);
136 if (le32_to_cpu(rxv[0]) & MT_PRXV_TXBF)
137 he->data5 |= HE_BITS(DATA5_TXBF);
138 he->data6 = HE_PREP(DATA6_TXOP, TXOP_DUR, rxv[9]) |
139 HE_PREP(DATA6_DOPPLER, DOPPLER, rxv[9]);
140
141 switch (mode) {
142 case MT_PHY_TYPE_HE_SU:
143 he->data1 |= HE_BITS(DATA1_FORMAT_SU) |
144 HE_BITS(DATA1_UL_DL_KNOWN) |
145 HE_BITS(DATA1_BEAM_CHANGE_KNOWN) |
146 HE_BITS(DATA1_BW_RU_ALLOC_KNOWN);
147
148 he->data3 |= HE_PREP(DATA3_BEAM_CHANGE, BEAM_CHNG, rxv[8]) |
149 HE_PREP(DATA3_UL_DL, UPLINK, rxv[5]);
150 break;
151 case MT_PHY_TYPE_HE_EXT_SU:
152 he->data1 |= HE_BITS(DATA1_FORMAT_EXT_SU) |
153 HE_BITS(DATA1_UL_DL_KNOWN) |
154 HE_BITS(DATA1_BW_RU_ALLOC_KNOWN);
155
156 he->data3 |= HE_PREP(DATA3_UL_DL, UPLINK, rxv[5]);
157 break;
158 case MT_PHY_TYPE_HE_MU:
159 he->data1 |= HE_BITS(DATA1_FORMAT_MU) |
160 HE_BITS(DATA1_UL_DL_KNOWN);
161
162 he->data3 |= HE_PREP(DATA3_UL_DL, UPLINK, rxv[5]);
163 he->data4 |= HE_PREP(DATA4_MU_STA_ID, MU_AID, rxv[8]);
164
165 mt76_connac3_mac_decode_he_radiotap_ru(status, he, rxv);
166 mt76_connac3_mac_decode_he_mu_radiotap(skb, rxv);
167 break;
168 case MT_PHY_TYPE_HE_TB:
169 he->data1 |= HE_BITS(DATA1_FORMAT_TRIG) |
170 HE_BITS(DATA1_SPTL_REUSE2_KNOWN) |
171 HE_BITS(DATA1_SPTL_REUSE3_KNOWN) |
172 HE_BITS(DATA1_SPTL_REUSE4_KNOWN);
173
174 he->data4 |= HE_PREP(DATA4_TB_SPTL_REUSE1, SR_MASK, rxv[13]) |
175 HE_PREP(DATA4_TB_SPTL_REUSE2, SR1_MASK, rxv[13]) |
176 HE_PREP(DATA4_TB_SPTL_REUSE3, SR2_MASK, rxv[13]) |
177 HE_PREP(DATA4_TB_SPTL_REUSE4, SR3_MASK, rxv[13]);
178
179 mt76_connac3_mac_decode_he_radiotap_ru(status, he, rxv);
180 break;
181 default:
182 break;
183 }
184 }
185 EXPORT_SYMBOL_GPL(mt76_connac3_mac_decode_he_radiotap);
186
187 static void *
mt76_connac3_mac_radiotap_push_tlv(struct sk_buff * skb,u16 type,u16 len)188 mt76_connac3_mac_radiotap_push_tlv(struct sk_buff *skb, u16 type, u16 len)
189 {
190 struct ieee80211_radiotap_tlv *tlv;
191
192 tlv = skb_push(skb, sizeof(*tlv) + len);
193 tlv->type = cpu_to_le16(type);
194 tlv->len = cpu_to_le16(len);
195 memset(tlv->data, 0, len);
196
197 return tlv->data;
198 }
199
mt76_connac3_mac_decode_eht_radiotap(struct sk_buff * skb,__le32 * rxv,u8 mode)200 void mt76_connac3_mac_decode_eht_radiotap(struct sk_buff *skb, __le32 *rxv,
201 u8 mode)
202 {
203 struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
204 struct ieee80211_radiotap_eht_usig *usig;
205 struct ieee80211_radiotap_eht *eht;
206 u32 ltf_size = le32_get_bits(rxv[4], MT_CRXV_HE_LTF_SIZE) + 1;
207 u8 bw = FIELD_GET(MT_PRXV_FRAME_MODE, le32_to_cpu(rxv[2]));
208
209 if (WARN_ONCE(skb_mac_header(skb) != skb->data,
210 "Should push tlv at the top of mac hdr"))
211 return;
212
213 eht = mt76_connac3_mac_radiotap_push_tlv(skb, IEEE80211_RADIOTAP_EHT,
214 sizeof(*eht) + sizeof(u32));
215 usig = mt76_connac3_mac_radiotap_push_tlv(skb, IEEE80211_RADIOTAP_EHT_USIG,
216 sizeof(*usig));
217
218 status->flag |= RX_FLAG_RADIOTAP_TLV_AT_END;
219
220 eht->known |= EHT_BITS(KNOWN_SPATIAL_REUSE) |
221 EHT_BITS(KNOWN_GI) |
222 EHT_BITS(KNOWN_EHT_LTF) |
223 EHT_BITS(KNOWN_LDPC_EXTRA_SYM_OM) |
224 EHT_BITS(KNOWN_PE_DISAMBIGUITY_OM) |
225 EHT_BITS(KNOWN_NSS_S);
226
227 eht->data[0] |=
228 EHT_PREP(DATA0_SPATIAL_REUSE, SR_MASK, rxv[13]) |
229 cpu_to_le32(FIELD_PREP(IEEE80211_RADIOTAP_EHT_DATA0_GI, status->eht.gi) |
230 FIELD_PREP(IEEE80211_RADIOTAP_EHT_DATA0_LTF, ltf_size)) |
231 EHT_PREP(DATA0_PE_DISAMBIGUITY_OM, PE_DISAMBIG, rxv[5]) |
232 EHT_PREP(DATA0_LDPC_EXTRA_SYM_OM, LDPC_EXT_SYM, rxv[4]);
233
234 eht->data[7] |= le32_encode_bits(status->nss, IEEE80211_RADIOTAP_EHT_DATA7_NSS_S);
235
236 eht->user_info[0] |=
237 EHT_BITS(USER_INFO_MCS_KNOWN) |
238 EHT_BITS(USER_INFO_CODING_KNOWN) |
239 EHT_BITS(USER_INFO_NSS_KNOWN_O) |
240 EHT_BITS(USER_INFO_BEAMFORMING_KNOWN_O) |
241 EHT_BITS(USER_INFO_DATA_FOR_USER) |
242 le32_encode_bits(status->rate_idx, IEEE80211_RADIOTAP_EHT_USER_INFO_MCS) |
243 le32_encode_bits(status->nss, IEEE80211_RADIOTAP_EHT_USER_INFO_NSS_O);
244
245 if (le32_to_cpu(rxv[0]) & MT_PRXV_TXBF)
246 eht->user_info[0] |= EHT_BITS(USER_INFO_BEAMFORMING_O);
247
248 if (le32_to_cpu(rxv[0]) & MT_PRXV_HT_AD_CODE)
249 eht->user_info[0] |= EHT_BITS(USER_INFO_CODING);
250
251 if (mode == MT_PHY_TYPE_EHT_MU)
252 eht->user_info[0] |= EHT_BITS(USER_INFO_STA_ID_KNOWN) |
253 EHT_PREP(USER_INFO_STA_ID, MU_AID, rxv[8]);
254
255 usig->common |=
256 EHT_BITS(USIG_COMMON_PHY_VER_KNOWN) |
257 EHT_BITS(USIG_COMMON_BW_KNOWN) |
258 EHT_BITS(USIG_COMMON_UL_DL_KNOWN) |
259 EHT_BITS(USIG_COMMON_BSS_COLOR_KNOWN) |
260 EHT_BITS(USIG_COMMON_TXOP_KNOWN) |
261 le32_encode_bits(0, IEEE80211_RADIOTAP_EHT_USIG_COMMON_PHY_VER) |
262 le32_encode_bits(bw, IEEE80211_RADIOTAP_EHT_USIG_COMMON_BW) |
263 EHT_PREP(USIG_COMMON_UL_DL, UPLINK, rxv[5]) |
264 EHT_PREP(USIG_COMMON_BSS_COLOR, BSS_COLOR, rxv[9]) |
265 EHT_PREP(USIG_COMMON_TXOP, TXOP_DUR, rxv[9]);
266 }
267 EXPORT_SYMBOL_GPL(mt76_connac3_mac_decode_eht_radiotap);
268