wifi: mt76: connac: add connac3 mac library

Introduce connac3_mac in mt76_connac library to reuse mac code shared between WiFi7 chipsets. So far connac3 library contains just radiotap parsing code. Signed-off-by: Lorenzo Bianconi <[email protected]> Signed-off-by: Felix Fietkau <[email protected]>
Ciusss89 · Jun 22, 2023 · 29cfabb · 29cfabb
1 parent 0dc4326
commit 29cfabb
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Showing 4 changed files with 187 additions and 180 deletions.
diff --git a/Makefile b/Makefile
@@ -28,7 +28,7 @@ mt76x02-lib-y := mt76x02_util.o mt76x02_mac.o mt76x02_mcu.o \
 
 mt76x02-usb-y := mt76x02_usb_mcu.o mt76x02_usb_core.o
 
-mt76-connac-lib-y := mt76_connac_mcu.o mt76_connac_mac.o
+mt76-connac-lib-y := mt76_connac_mcu.o mt76_connac_mac.o mt76_connac3_mac.o
 
 obj-$(CONFIG_MT76x0_COMMON) += mt76x0/
 obj-$(CONFIG_MT76x2_COMMON) += mt76x2/

diff --git a/mt76_connac.h b/mt76_connac.h
@@ -425,4 +425,7 @@ void mt76_connac2_txwi_free(struct mt76_dev *dev, struct mt76_txwi_cache *t,
 			    struct list_head *free_list);
 void mt76_connac2_tx_token_put(struct mt76_dev *dev);
 
+/* connac3 */
+void mt76_connac3_mac_decode_he_radiotap(struct sk_buff *skb, __le32 *rxv,
+					 u8 mode);
 #endif /* __MT76_CONNAC_H */
diff --git a/mt76_connac3_mac.c b/mt76_connac3_mac.c
@@ -0,0 +1,182 @@
+// SPDX-License-Identifier: ISC
+/* Copyright (C) 2023 MediaTek Inc. */
+
+#include "mt76_connac.h"
+#include "mt76_connac3_mac.h"
+#include "dma.h"
+
+#define HE_BITS(f)		cpu_to_le16(IEEE80211_RADIOTAP_HE_##f)
+#define HE_PREP(f, m, v)	le16_encode_bits(le32_get_bits(v, MT_CRXV_HE_##m),\
+						 IEEE80211_RADIOTAP_HE_##f)
+
+static void
+mt76_connac3_mac_decode_he_radiotap_ru(struct mt76_rx_status *status,
+				       struct ieee80211_radiotap_he *he,
+				       __le32 *rxv)
+{
+	u32 ru = le32_get_bits(rxv[0], MT_PRXV_HE_RU_ALLOC), offs = 0;
+
+	status->bw = RATE_INFO_BW_HE_RU;
+
+	switch (ru) {
+	case 0 ... 36:
+		status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_26;
+		offs = ru;
+		break;
+	case 37 ... 52:
+		status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_52;
+		offs = ru - 37;
+		break;
+	case 53 ... 60:
+		status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106;
+		offs = ru - 53;
+		break;
+	case 61 ... 64:
+		status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_242;
+		offs = ru - 61;
+		break;
+	case 65 ... 66:
+		status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_484;
+		offs = ru - 65;
+		break;
+	case 67:
+		status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_996;
+		break;
+	case 68:
+		status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_2x996;
+		break;
+	}
+
+	he->data1 |= HE_BITS(DATA1_BW_RU_ALLOC_KNOWN);
+	he->data2 |= HE_BITS(DATA2_RU_OFFSET_KNOWN) |
+		     le16_encode_bits(offs,
+				      IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET);
+}
+
+#define MU_PREP(f, v)	le16_encode_bits(v, IEEE80211_RADIOTAP_HE_MU_##f)
+static void
+mt76_connac3_mac_decode_he_mu_radiotap(struct sk_buff *skb, __le32 *rxv)
+{
+	struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
+	static const struct ieee80211_radiotap_he_mu mu_known = {
+		.flags1 = HE_BITS(MU_FLAGS1_SIG_B_MCS_KNOWN) |
+			  HE_BITS(MU_FLAGS1_SIG_B_DCM_KNOWN) |
+			  HE_BITS(MU_FLAGS1_CH1_RU_KNOWN) |
+			  HE_BITS(MU_FLAGS1_SIG_B_SYMS_USERS_KNOWN),
+		.flags2 = HE_BITS(MU_FLAGS2_BW_FROM_SIG_A_BW_KNOWN),
+	};
+	struct ieee80211_radiotap_he_mu *he_mu;
+
+	status->flag |= RX_FLAG_RADIOTAP_HE_MU;
+
+	he_mu = skb_push(skb, sizeof(mu_known));
+	memcpy(he_mu, &mu_known, sizeof(mu_known));
+
+	he_mu->flags1 |= MU_PREP(FLAGS1_SIG_B_MCS, status->rate_idx);
+	if (status->he_dcm)
+		he_mu->flags1 |= MU_PREP(FLAGS1_SIG_B_DCM, status->he_dcm);
+
+	he_mu->flags2 |= MU_PREP(FLAGS2_BW_FROM_SIG_A_BW, status->bw) |
+			 MU_PREP(FLAGS2_SIG_B_SYMS_USERS,
+				 le32_get_bits(rxv[4], MT_CRXV_HE_NUM_USER));
+
+	he_mu->ru_ch1[0] = le32_get_bits(rxv[16], MT_CRXV_HE_RU0) & 0xff;
+
+	if (status->bw >= RATE_INFO_BW_40) {
+		he_mu->flags1 |= HE_BITS(MU_FLAGS1_CH2_RU_KNOWN);
+		he_mu->ru_ch2[0] = le32_get_bits(rxv[16], MT_CRXV_HE_RU1) & 0xff;
+	}
+
+	if (status->bw >= RATE_INFO_BW_80) {
+		u32 ru_h, ru_l;
+
+		he_mu->ru_ch1[1] = le32_get_bits(rxv[16], MT_CRXV_HE_RU2) & 0xff;
+
+		ru_l = le32_get_bits(rxv[16], MT_CRXV_HE_RU3_L);
+		ru_h = le32_get_bits(rxv[17], MT_CRXV_HE_RU3_H) & 0x7;
+		he_mu->ru_ch2[1] = (u8)(ru_l | ru_h << 4);
+	}
+}
+
+void mt76_connac3_mac_decode_he_radiotap(struct sk_buff *skb, __le32 *rxv,
+					 u8 mode)
+{
+	struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
+	static const struct ieee80211_radiotap_he known = {
+		.data1 = HE_BITS(DATA1_DATA_MCS_KNOWN) |
+			 HE_BITS(DATA1_DATA_DCM_KNOWN) |
+			 HE_BITS(DATA1_STBC_KNOWN) |
+			 HE_BITS(DATA1_CODING_KNOWN) |
+			 HE_BITS(DATA1_LDPC_XSYMSEG_KNOWN) |
+			 HE_BITS(DATA1_DOPPLER_KNOWN) |
+			 HE_BITS(DATA1_SPTL_REUSE_KNOWN) |
+			 HE_BITS(DATA1_BSS_COLOR_KNOWN),
+		.data2 = HE_BITS(DATA2_GI_KNOWN) |
+			 HE_BITS(DATA2_TXBF_KNOWN) |
+			 HE_BITS(DATA2_PE_DISAMBIG_KNOWN) |
+			 HE_BITS(DATA2_TXOP_KNOWN),
+	};
+	u32 ltf_size = le32_get_bits(rxv[4], MT_CRXV_HE_LTF_SIZE) + 1;
+	struct ieee80211_radiotap_he *he;
+
+	status->flag |= RX_FLAG_RADIOTAP_HE;
+
+	he = skb_push(skb, sizeof(known));
+	memcpy(he, &known, sizeof(known));
+
+	he->data3 = HE_PREP(DATA3_BSS_COLOR, BSS_COLOR, rxv[9]) |
+		    HE_PREP(DATA3_LDPC_XSYMSEG, LDPC_EXT_SYM, rxv[4]);
+	he->data4 = HE_PREP(DATA4_SU_MU_SPTL_REUSE, SR_MASK, rxv[13]);
+	he->data5 = HE_PREP(DATA5_PE_DISAMBIG, PE_DISAMBIG, rxv[5]) |
+		    le16_encode_bits(ltf_size,
+				     IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE);
+	if (le32_to_cpu(rxv[0]) & MT_PRXV_TXBF)
+		he->data5 |= HE_BITS(DATA5_TXBF);
+	he->data6 = HE_PREP(DATA6_TXOP, TXOP_DUR, rxv[9]) |
+		    HE_PREP(DATA6_DOPPLER, DOPPLER, rxv[9]);
+
+	switch (mode) {
+	case MT_PHY_TYPE_HE_SU:
+		he->data1 |= HE_BITS(DATA1_FORMAT_SU) |
+			     HE_BITS(DATA1_UL_DL_KNOWN) |
+			     HE_BITS(DATA1_BEAM_CHANGE_KNOWN) |
+			     HE_BITS(DATA1_BW_RU_ALLOC_KNOWN);
+
+		he->data3 |= HE_PREP(DATA3_BEAM_CHANGE, BEAM_CHNG, rxv[8]) |
+			     HE_PREP(DATA3_UL_DL, UPLINK, rxv[5]);
+		break;
+	case MT_PHY_TYPE_HE_EXT_SU:
+		he->data1 |= HE_BITS(DATA1_FORMAT_EXT_SU) |
+			     HE_BITS(DATA1_UL_DL_KNOWN) |
+			     HE_BITS(DATA1_BW_RU_ALLOC_KNOWN);
+
+		he->data3 |= HE_PREP(DATA3_UL_DL, UPLINK, rxv[5]);
+		break;
+	case MT_PHY_TYPE_HE_MU:
+		he->data1 |= HE_BITS(DATA1_FORMAT_MU) |
+			     HE_BITS(DATA1_UL_DL_KNOWN);
+
+		he->data3 |= HE_PREP(DATA3_UL_DL, UPLINK, rxv[5]);
+		he->data4 |= HE_PREP(DATA4_MU_STA_ID, MU_AID, rxv[8]);
+
+		mt76_connac3_mac_decode_he_radiotap_ru(status, he, rxv);
+		mt76_connac3_mac_decode_he_mu_radiotap(skb, rxv);
+		break;
+	case MT_PHY_TYPE_HE_TB:
+		he->data1 |= HE_BITS(DATA1_FORMAT_TRIG) |
+			     HE_BITS(DATA1_SPTL_REUSE2_KNOWN) |
+			     HE_BITS(DATA1_SPTL_REUSE3_KNOWN) |
+			     HE_BITS(DATA1_SPTL_REUSE4_KNOWN);
+
+		he->data4 |= HE_PREP(DATA4_TB_SPTL_REUSE1, SR_MASK, rxv[13]) |
+			     HE_PREP(DATA4_TB_SPTL_REUSE2, SR1_MASK, rxv[13]) |
+			     HE_PREP(DATA4_TB_SPTL_REUSE3, SR2_MASK, rxv[13]) |
+			     HE_PREP(DATA4_TB_SPTL_REUSE4, SR3_MASK, rxv[13]);
+
+		mt76_connac3_mac_decode_he_radiotap_ru(status, he, rxv);
+		break;
+	default:
+		break;
+	}
+}
+EXPORT_SYMBOL_GPL(mt76_connac3_mac_decode_he_radiotap);