mac80211 expects the definition of what HE rate info is available
inside astruct prepended to the skb.
Signed-off-by: Ryder Lee <[email protected]>
---
.../net/wireless/mediatek/mt76/mt7915/mac.c | 141 ++++++++++++++++++
.../net/wireless/mediatek/mt76/mt7915/mac.h | 16 ++
2 files changed, 157 insertions(+)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
index 511a6d2e8dd1..fa92b0a3a464 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
@@ -9,6 +9,10 @@
#define to_rssi(field, rxv) ((FIELD_GET(field, rxv) - 220) / 2)
+#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 const struct mt7915_dfs_radar_spec etsi_radar_specs = {
.pulse_th = { 110, -10, -80, 40, 5200, 128, 5200 },
.radar_pattern = {
@@ -172,6 +176,138 @@ void mt7915_mac_sta_poll(struct mt7915_dev *dev)
rcu_read_unlock();
}
+static void
+mt7915_mac_decode_he_radiotap_ru(struct mt76_rx_status *status,
+ struct mt7915_rxv *rxv,
+ struct ieee80211_radiotap_he *he)
+{
+ u32 ru_h, ru_l;
+ u8 ru, offs = 0;
+
+ ru_l = FIELD_GET(MT_PRXV_HE_RU_ALLOC_L, le32_to_cpu(rxv->v[0]));
+ ru_h = FIELD_GET(MT_PRXV_HE_RU_ALLOC_H, le32_to_cpu(rxv->v[1]));
+ ru = (u8)(ru_l | ru_h << 4);
+
+ 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);
+}
+
+static void
+mt7915_mac_decode_he_radiotap(struct sk_buff *skb,
+ struct mt76_rx_status *status,
+ struct mt7915_rxv *rxv)
+{
+ /* TODO: struct ieee80211_radiotap_he_mu */
+ 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),
+ .data2 = HE_BITS(DATA2_GI_KNOWN) |
+ HE_BITS(DATA2_TXBF_KNOWN),
+ };
+ struct ieee80211_radiotap_he *he = NULL;
+ __le32 v2 = rxv->v[2];
+ __le32 v11 = rxv->v[11];
+ __le32 v14 = rxv->v[14];
+ u32 ltf_size = le32_get_bits(v2, MT_CRXV_HE_LTF_SIZE) + 1;
+
+ he = skb_push(skb, sizeof(known));
+ memcpy(he, &known, sizeof(known));
+
+ he->data1 = HE_BITS(DATA1_LDPC_XSYMSEG_KNOWN) |
+ HE_BITS(DATA1_DOPPLER_KNOWN) |
+ HE_BITS(DATA1_BSS_COLOR_KNOWN);
+ he->data2 = HE_BITS(DATA2_PE_DISAMBIG_KNOWN) |
+ HE_BITS(DATA2_TXOP_KNOWN);
+
+ he->data3 = HE_PREP(DATA3_BSS_COLOR, BSS_COLOR, v14) |
+ HE_PREP(DATA3_LDPC_XSYMSEG, LDPC_EXT_SYM, v2);
+ he->data5 = HE_PREP(DATA5_PE_DISAMBIG, PE_DISAMBIG, v2) |
+ le16_encode_bits(ltf_size,
+ IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE);
+ he->data6 = HE_PREP(DATA6_TXOP, TXOP_DUR, v14) |
+ HE_PREP(DATA6_DOPPLER, DOPPLER, v14);
+
+ switch (rxv->phy) {
+ 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_SPTL_REUSE_KNOWN);
+
+ he->data3 |= HE_PREP(DATA3_BEAM_CHANGE, BEAM_CHNG, v14) |
+ HE_PREP(DATA3_UL_DL, UPLINK, v2);
+ he->data4 |= HE_PREP(DATA4_SU_MU_SPTL_REUSE, SR_MASK, v11);
+ break;
+ case MT_PHY_TYPE_HE_EXT_SU:
+ he->data1 |= HE_BITS(DATA1_FORMAT_EXT_SU) |
+ HE_BITS(DATA1_UL_DL_KNOWN);
+
+ he->data3 |= HE_PREP(DATA3_UL_DL, UPLINK, v2);
+ break;
+ case MT_PHY_TYPE_HE_MU:
+ he->data1 |= HE_BITS(DATA1_FORMAT_MU) |
+ HE_BITS(DATA1_UL_DL_KNOWN) |
+ HE_BITS(DATA1_SPTL_REUSE_KNOWN);
+
+ he->data3 |= HE_PREP(DATA3_UL_DL, UPLINK, v2);
+ he->data4 |= HE_PREP(DATA4_SU_MU_SPTL_REUSE, SR_MASK, v11);
+
+ mt7915_mac_decode_he_radiotap_ru(status, rxv, he);
+ break;
+ case MT_PHY_TYPE_HE_TB:
+ he->data1 |= HE_BITS(DATA1_FORMAT_TRIG) |
+ HE_BITS(DATA1_SPTL_REUSE_KNOWN) |
+ 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, v11) |
+ HE_PREP(DATA4_TB_SPTL_REUSE2, SR1_MASK, v11) |
+ HE_PREP(DATA4_TB_SPTL_REUSE3, SR2_MASK, v11) |
+ HE_PREP(DATA4_TB_SPTL_REUSE4, SR3_MASK, v11);
+
+ mt7915_mac_decode_he_radiotap_ru(status, rxv, he);
+ break;
+ default:
+ break;
+ }
+}
+
int mt7915_mac_fill_rx(struct mt7915_dev *dev, struct sk_buff *skb)
{
struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
@@ -348,6 +484,7 @@ int mt7915_mac_fill_rx(struct mt7915_dev *dev, struct sk_buff *skb)
return -EINVAL;
break;
case MT_PHY_TYPE_HE_MU:
+ status->flag |= RX_FLAG_RADIOTAP_HE_MU;
/* fall through */
case MT_PHY_TYPE_HE_SU:
case MT_PHY_TYPE_HE_EXT_SU:
@@ -355,6 +492,7 @@ int mt7915_mac_fill_rx(struct mt7915_dev *dev, struct sk_buff *skb)
status->nss =
FIELD_GET(MT_PRXV_NSTS, rxv.v[0]) + 1;
status->encoding = RX_ENC_HE;
+ status->flag |= RX_FLAG_RADIOTAP_HE;
i &= GENMASK(3, 0);
if (gi <= NL80211_RATE_INFO_HE_GI_3_2)
@@ -405,6 +543,9 @@ int mt7915_mac_fill_rx(struct mt7915_dev *dev, struct sk_buff *skb)
mt76_insert_ccmp_hdr(skb, key_id);
}
+ if (status->flag & RX_FLAG_RADIOTAP_HE)
+ mt7915_mac_decode_he_radiotap(skb, status, &rxv);
+
hdr = mt76_skb_get_hdr(skb);
if (!status->wcid || !ieee80211_is_data_qos(hdr->frame_control))
return 0;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.h b/drivers/net/wireless/mediatek/mt76/mt7915/mac.h
index 712753484aee..b9bc8b25b031 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.h
@@ -101,6 +101,8 @@ enum rx_pkt_type {
#define MT_PRXV_TX_ER_SU_106T BIT(5)
#define MT_PRXV_NSTS GENMASK(9, 7)
#define MT_PRXV_HT_AD_CODE BIT(11)
+#define MT_PRXV_HE_RU_ALLOC_L GENMASK(31, 28)
+#define MT_PRXV_HE_RU_ALLOC_H GENMASK(3, 0)
#define MT_PRXV_RCPI3 GENMASK(31, 24)
#define MT_PRXV_RCPI2 GENMASK(23, 16)
#define MT_PRXV_RCPI1 GENMASK(15, 8)
@@ -111,6 +113,20 @@ enum rx_pkt_type {
#define MT_CRXV_TX_MODE GENMASK(7, 4)
#define MT_CRXV_FRAME_MODE GENMASK(10, 8)
#define MT_CRXV_HT_SHORT_GI GENMASK(14, 13)
+#define MT_CRXV_HE_LTF_SIZE GENMASK(18, 17)
+#define MT_CRXV_HE_LDPC_EXT_SYM BIT(20)
+#define MT_CRXV_HE_PE_DISAMBIG BIT(23)
+#define MT_CRXV_HE_UPLINK BIT(31)
+
+#define MT_CRXV_HE_SR_MASK GENMASK(11, 8)
+#define MT_CRXV_HE_SR1_MASK GENMASK(16, 12)
+#define MT_CRXV_HE_SR2_MASK GENMASK(20, 17)
+#define MT_CRXV_HE_SR3_MASK GENMASK(24, 21)
+
+#define MT_CRXV_HE_BSS_COLOR GENMASK(5, 0)
+#define MT_CRXV_HE_TXOP_DUR GENMASK(12, 6)
+#define MT_CRXV_HE_BEAM_CHNG BIT(13)
+#define MT_CRXV_HE_DOPPLER BIT(16)
struct mt7915_rxv {
u32 phy;
--
2.18.0