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
 15static void
 16mt76_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)
 60static void
 61mt76_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
104void 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}
185EXPORT_SYMBOL_GPL(mt76_connac3_mac_decode_he_radiotap);
186
187static void *
188mt76_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
200void 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}
267EXPORT_SYMBOL_GPL(mt76_connac3_mac_decode_eht_radiotap);