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 HE_PREP(f, m, v)	le16_encode_bits(le32_get_bits(v, MT_CRXV_HE_##m),\
 10						 IEEE80211_RADIOTAP_HE_##f)
 11
 12static void
 13mt76_connac3_mac_decode_he_radiotap_ru(struct mt76_rx_status *status,
 14				       struct ieee80211_radiotap_he *he,
 15				       __le32 *rxv)
 16{
 17	u32 ru = le32_get_bits(rxv[0], MT_PRXV_HE_RU_ALLOC), offs = 0;
 18
 19	status->bw = RATE_INFO_BW_HE_RU;
 20
 21	switch (ru) {
 22	case 0 ... 36:
 23		status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_26;
 24		offs = ru;
 25		break;
 26	case 37 ... 52:
 27		status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_52;
 28		offs = ru - 37;
 29		break;
 30	case 53 ... 60:
 31		status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106;
 32		offs = ru - 53;
 33		break;
 34	case 61 ... 64:
 35		status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_242;
 36		offs = ru - 61;
 37		break;
 38	case 65 ... 66:
 39		status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_484;
 40		offs = ru - 65;
 41		break;
 42	case 67:
 43		status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_996;
 44		break;
 45	case 68:
 46		status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_2x996;
 47		break;
 48	}
 49
 50	he->data1 |= HE_BITS(DATA1_BW_RU_ALLOC_KNOWN);
 51	he->data2 |= HE_BITS(DATA2_RU_OFFSET_KNOWN) |
 52		     le16_encode_bits(offs,
 53				      IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET);
 54}
 55
 56#define MU_PREP(f, v)	le16_encode_bits(v, IEEE80211_RADIOTAP_HE_MU_##f)
 57static void
 58mt76_connac3_mac_decode_he_mu_radiotap(struct sk_buff *skb, __le32 *rxv)
 59{
 60	struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
 61	static const struct ieee80211_radiotap_he_mu mu_known = {
 62		.flags1 = HE_BITS(MU_FLAGS1_SIG_B_MCS_KNOWN) |
 63			  HE_BITS(MU_FLAGS1_SIG_B_DCM_KNOWN) |
 64			  HE_BITS(MU_FLAGS1_CH1_RU_KNOWN) |
 65			  HE_BITS(MU_FLAGS1_SIG_B_SYMS_USERS_KNOWN),
 66		.flags2 = HE_BITS(MU_FLAGS2_BW_FROM_SIG_A_BW_KNOWN),
 67	};
 68	struct ieee80211_radiotap_he_mu *he_mu;
 69
 70	status->flag |= RX_FLAG_RADIOTAP_HE_MU;
 71
 72	he_mu = skb_push(skb, sizeof(mu_known));
 73	memcpy(he_mu, &mu_known, sizeof(mu_known));
 74
 75	he_mu->flags1 |= MU_PREP(FLAGS1_SIG_B_MCS, status->rate_idx);
 76	if (status->he_dcm)
 77		he_mu->flags1 |= MU_PREP(FLAGS1_SIG_B_DCM, status->he_dcm);
 78
 79	he_mu->flags2 |= MU_PREP(FLAGS2_BW_FROM_SIG_A_BW, status->bw) |
 80			 MU_PREP(FLAGS2_SIG_B_SYMS_USERS,
 81				 le32_get_bits(rxv[4], MT_CRXV_HE_NUM_USER));
 82
 83	he_mu->ru_ch1[0] = le32_get_bits(rxv[16], MT_CRXV_HE_RU0) & 0xff;
 84
 85	if (status->bw >= RATE_INFO_BW_40) {
 86		he_mu->flags1 |= HE_BITS(MU_FLAGS1_CH2_RU_KNOWN);
 87		he_mu->ru_ch2[0] = le32_get_bits(rxv[16], MT_CRXV_HE_RU1) & 0xff;
 88	}
 89
 90	if (status->bw >= RATE_INFO_BW_80) {
 91		u32 ru_h, ru_l;
 92
 93		he_mu->ru_ch1[1] = le32_get_bits(rxv[16], MT_CRXV_HE_RU2) & 0xff;
 94
 95		ru_l = le32_get_bits(rxv[16], MT_CRXV_HE_RU3_L);
 96		ru_h = le32_get_bits(rxv[17], MT_CRXV_HE_RU3_H) & 0x7;
 97		he_mu->ru_ch2[1] = (u8)(ru_l | ru_h << 4);
 98	}
 99}
100
101void mt76_connac3_mac_decode_he_radiotap(struct sk_buff *skb, __le32 *rxv,
102					 u8 mode)
103{
104	struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
105	static const struct ieee80211_radiotap_he known = {
106		.data1 = HE_BITS(DATA1_DATA_MCS_KNOWN) |
107			 HE_BITS(DATA1_DATA_DCM_KNOWN) |
108			 HE_BITS(DATA1_STBC_KNOWN) |
109			 HE_BITS(DATA1_CODING_KNOWN) |
110			 HE_BITS(DATA1_LDPC_XSYMSEG_KNOWN) |
111			 HE_BITS(DATA1_DOPPLER_KNOWN) |
112			 HE_BITS(DATA1_SPTL_REUSE_KNOWN) |
113			 HE_BITS(DATA1_BSS_COLOR_KNOWN),
114		.data2 = HE_BITS(DATA2_GI_KNOWN) |
115			 HE_BITS(DATA2_TXBF_KNOWN) |
116			 HE_BITS(DATA2_PE_DISAMBIG_KNOWN) |
117			 HE_BITS(DATA2_TXOP_KNOWN),
118	};
119	u32 ltf_size = le32_get_bits(rxv[4], MT_CRXV_HE_LTF_SIZE) + 1;
120	struct ieee80211_radiotap_he *he;
121
122	status->flag |= RX_FLAG_RADIOTAP_HE;
123
124	he = skb_push(skb, sizeof(known));
125	memcpy(he, &known, sizeof(known));
126
127	he->data3 = HE_PREP(DATA3_BSS_COLOR, BSS_COLOR, rxv[9]) |
128		    HE_PREP(DATA3_LDPC_XSYMSEG, LDPC_EXT_SYM, rxv[4]);
129	he->data4 = HE_PREP(DATA4_SU_MU_SPTL_REUSE, SR_MASK, rxv[13]);
130	he->data5 = HE_PREP(DATA5_PE_DISAMBIG, PE_DISAMBIG, rxv[5]) |
131		    le16_encode_bits(ltf_size,
132				     IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE);
133	if (le32_to_cpu(rxv[0]) & MT_PRXV_TXBF)
134		he->data5 |= HE_BITS(DATA5_TXBF);
135	he->data6 = HE_PREP(DATA6_TXOP, TXOP_DUR, rxv[9]) |
136		    HE_PREP(DATA6_DOPPLER, DOPPLER, rxv[9]);
137
138	switch (mode) {
139	case MT_PHY_TYPE_HE_SU:
140		he->data1 |= HE_BITS(DATA1_FORMAT_SU) |
141			     HE_BITS(DATA1_UL_DL_KNOWN) |
142			     HE_BITS(DATA1_BEAM_CHANGE_KNOWN) |
143			     HE_BITS(DATA1_BW_RU_ALLOC_KNOWN);
144
145		he->data3 |= HE_PREP(DATA3_BEAM_CHANGE, BEAM_CHNG, rxv[8]) |
146			     HE_PREP(DATA3_UL_DL, UPLINK, rxv[5]);
147		break;
148	case MT_PHY_TYPE_HE_EXT_SU:
149		he->data1 |= HE_BITS(DATA1_FORMAT_EXT_SU) |
150			     HE_BITS(DATA1_UL_DL_KNOWN) |
151			     HE_BITS(DATA1_BW_RU_ALLOC_KNOWN);
152
153		he->data3 |= HE_PREP(DATA3_UL_DL, UPLINK, rxv[5]);
154		break;
155	case MT_PHY_TYPE_HE_MU:
156		he->data1 |= HE_BITS(DATA1_FORMAT_MU) |
157			     HE_BITS(DATA1_UL_DL_KNOWN);
158
159		he->data3 |= HE_PREP(DATA3_UL_DL, UPLINK, rxv[5]);
160		he->data4 |= HE_PREP(DATA4_MU_STA_ID, MU_AID, rxv[8]);
161
162		mt76_connac3_mac_decode_he_radiotap_ru(status, he, rxv);
163		mt76_connac3_mac_decode_he_mu_radiotap(skb, rxv);
164		break;
165	case MT_PHY_TYPE_HE_TB:
166		he->data1 |= HE_BITS(DATA1_FORMAT_TRIG) |
167			     HE_BITS(DATA1_SPTL_REUSE2_KNOWN) |
168			     HE_BITS(DATA1_SPTL_REUSE3_KNOWN) |
169			     HE_BITS(DATA1_SPTL_REUSE4_KNOWN);
170
171		he->data4 |= HE_PREP(DATA4_TB_SPTL_REUSE1, SR_MASK, rxv[13]) |
172			     HE_PREP(DATA4_TB_SPTL_REUSE2, SR1_MASK, rxv[13]) |
173			     HE_PREP(DATA4_TB_SPTL_REUSE3, SR2_MASK, rxv[13]) |
174			     HE_PREP(DATA4_TB_SPTL_REUSE4, SR3_MASK, rxv[13]);
175
176		mt76_connac3_mac_decode_he_radiotap_ru(status, he, rxv);
177		break;
178	default:
179		break;
180	}
181}
182EXPORT_SYMBOL_GPL(mt76_connac3_mac_decode_he_radiotap);