* [PATCH] mt76: mt7915: avoid memcpy in rxv operation
@ 2020-07-01 8:13 Ryder Lee
0 siblings, 0 replies; only message in thread
From: Ryder Lee @ 2020-07-01 8:13 UTC (permalink / raw)
To: Felix Fietkau, Lorenzo Bianconi, Sean Wang
Cc: linux-mediatek, Ryder Lee, linux-wireless, Shayne Chen
Avoid memcpy in Rx hot path to slightly improve performance.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
---
.../net/wireless/mediatek/mt76/mt7915/mac.c | 78 +++++++++----------
.../net/wireless/mediatek/mt76/mt7915/mac.h | 7 --
2 files changed, 37 insertions(+), 48 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
index 822540e5df6b..6825afca1efb 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
@@ -178,14 +178,14 @@ void mt7915_mac_sta_poll(struct mt7915_dev *dev)
static void
mt7915_mac_decode_he_radiotap_ru(struct mt76_rx_status *status,
- struct mt7915_rxv *rxv,
- struct ieee80211_radiotap_he *he)
+ struct ieee80211_radiotap_he *he,
+ __le32 *rxv)
{
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_l = FIELD_GET(MT_PRXV_HE_RU_ALLOC_L, le32_to_cpu(rxv[0]));
+ ru_h = FIELD_GET(MT_PRXV_HE_RU_ALLOC_H, le32_to_cpu(rxv[1]));
ru = (u8)(ru_l | ru_h << 4);
status->bw = RATE_INFO_BW_HE_RU;
@@ -228,7 +228,7 @@ mt7915_mac_decode_he_radiotap_ru(struct mt76_rx_status *status,
static void
mt7915_mac_decode_he_radiotap(struct sk_buff *skb,
struct mt76_rx_status *status,
- struct mt7915_rxv *rxv)
+ __le32 *rxv, u32 phy)
{
/* TODO: struct ieee80211_radiotap_he_mu */
static const struct ieee80211_radiotap_he known = {
@@ -245,48 +245,45 @@ mt7915_mac_decode_he_radiotap(struct sk_buff *skb,
HE_BITS(DATA2_TXOP_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;
+ u32 ltf_size = le32_get_bits(rxv[2], MT_CRXV_HE_LTF_SIZE) + 1;
he = skb_push(skb, sizeof(known));
memcpy(he, &known, sizeof(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) |
+ he->data3 = HE_PREP(DATA3_BSS_COLOR, BSS_COLOR, rxv[14]) |
+ HE_PREP(DATA3_LDPC_XSYMSEG, LDPC_EXT_SYM, rxv[2]);
+ he->data5 = HE_PREP(DATA5_PE_DISAMBIG, PE_DISAMBIG, rxv[2]) |
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);
+ he->data6 = HE_PREP(DATA6_TXOP, TXOP_DUR, rxv[14]) |
+ HE_PREP(DATA6_DOPPLER, DOPPLER, rxv[14]);
- switch (rxv->phy) {
+ switch (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);
+ he->data3 |= HE_PREP(DATA3_BEAM_CHANGE, BEAM_CHNG, rxv[14]) |
+ HE_PREP(DATA3_UL_DL, UPLINK, rxv[2]);
+ he->data4 |= HE_PREP(DATA4_SU_MU_SPTL_REUSE, SR_MASK, rxv[11]);
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);
+ he->data3 |= HE_PREP(DATA3_UL_DL, UPLINK, rxv[2]);
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);
+ he->data3 |= HE_PREP(DATA3_UL_DL, UPLINK, rxv[2]);
+ he->data4 |= HE_PREP(DATA4_SU_MU_SPTL_REUSE, SR_MASK, rxv[11]);
- mt7915_mac_decode_he_radiotap_ru(status, rxv, he);
+ mt7915_mac_decode_he_radiotap_ru(status, he, rxv);
break;
case MT_PHY_TYPE_HE_TB:
he->data1 |= HE_BITS(DATA1_FORMAT_TRIG) |
@@ -295,12 +292,12 @@ mt7915_mac_decode_he_radiotap(struct sk_buff *skb,
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);
+ he->data4 |= HE_PREP(DATA4_TB_SPTL_REUSE1, SR_MASK, rxv[11]) |
+ HE_PREP(DATA4_TB_SPTL_REUSE2, SR1_MASK, rxv[11]) |
+ HE_PREP(DATA4_TB_SPTL_REUSE3, SR2_MASK, rxv[11]) |
+ HE_PREP(DATA4_TB_SPTL_REUSE4, SR3_MASK, rxv[11]);
- mt7915_mac_decode_he_radiotap_ru(status, rxv, he);
+ mt7915_mac_decode_he_radiotap_ru(status, he, rxv);
break;
default:
break;
@@ -314,8 +311,9 @@ int mt7915_mac_fill_rx(struct mt7915_dev *dev, struct sk_buff *skb)
struct mt7915_phy *phy = &dev->phy;
struct ieee80211_supported_band *sband;
struct ieee80211_hdr *hdr;
- struct mt7915_rxv rxv = {};
__le32 *rxd = (__le32 *)skb->data;
+ __le32 *rxv = NULL;
+ u32 mode = 0;
u32 rxd1 = le32_to_cpu(rxd[1]);
u32 rxd2 = le32_to_cpu(rxd[2]);
u32 rxd3 = le32_to_cpu(rxd[3]);
@@ -427,15 +425,14 @@ int mt7915_mac_fill_rx(struct mt7915_dev *dev, struct sk_buff *skb)
if (rxd1 & MT_RXD1_NORMAL_GROUP_3) {
u32 v0, v1, v2;
- memcpy(rxv.v, rxd, sizeof(rxv.v));
-
+ rxv = rxd;
rxd += 2;
if ((u8 *)rxd - skb->data >= skb->len)
return -EINVAL;
- v0 = le32_to_cpu(rxv.v[0]);
- v1 = le32_to_cpu(rxv.v[1]);
- v2 = le32_to_cpu(rxv.v[2]);
+ v0 = le32_to_cpu(rxv[0]);
+ v1 = le32_to_cpu(rxv[1]);
+ v2 = le32_to_cpu(rxv[2]);
if (v0 & MT_PRXV_HT_AD_CODE)
status->enc_flags |= RX_ENC_FLAG_LDPC;
@@ -466,9 +463,9 @@ int mt7915_mac_fill_rx(struct mt7915_dev *dev, struct sk_buff *skb)
return -EINVAL;
idx = i = FIELD_GET(MT_PRXV_TX_RATE, v0);
- rxv.phy = FIELD_GET(MT_CRXV_TX_MODE, v2);
+ mode = FIELD_GET(MT_CRXV_TX_MODE, v2);
- switch (rxv.phy) {
+ switch (mode) {
case MT_PHY_TYPE_CCK:
cck = true;
/* fall through */
@@ -503,8 +500,7 @@ int mt7915_mac_fill_rx(struct mt7915_dev *dev, struct sk_buff *skb)
if (gi <= NL80211_RATE_INFO_HE_GI_3_2)
status->he_gi = gi;
- if (idx & MT_PRXV_TX_DCM)
- status->he_dcm = true;
+ status->he_dcm = !!(idx & MT_PRXV_TX_DCM);
break;
default:
return -EINVAL;
@@ -515,7 +511,7 @@ int mt7915_mac_fill_rx(struct mt7915_dev *dev, struct sk_buff *skb)
case IEEE80211_STA_RX_BW_20:
break;
case IEEE80211_STA_RX_BW_40:
- if (rxv.phy & MT_PHY_TYPE_HE_EXT_SU &&
+ if (mode & MT_PHY_TYPE_HE_EXT_SU &&
(idx & MT_PRXV_TX_ER_SU_106T)) {
status->bw = RATE_INFO_BW_HE_RU;
status->he_ru =
@@ -535,7 +531,7 @@ int mt7915_mac_fill_rx(struct mt7915_dev *dev, struct sk_buff *skb)
}
status->enc_flags |= RX_ENC_FLAG_STBC_MASK * stbc;
- if (rxv.phy < MT_PHY_TYPE_HE_SU && gi)
+ if (mode < MT_PHY_TYPE_HE_SU && gi)
status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
}
}
@@ -548,8 +544,8 @@ 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);
+ if (rxv && status->flag & RX_FLAG_RADIOTAP_HE)
+ mt7915_mac_decode_he_radiotap(skb, status, rxv, mode);
hdr = mt76_skb_get_hdr(skb);
if (!status->wcid || !ieee80211_is_data_qos(hdr->frame_control))
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.h b/drivers/net/wireless/mediatek/mt76/mt7915/mac.h
index 4b0871ab2414..c8bb5ea96c60 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.h
@@ -128,13 +128,6 @@ enum rx_pkt_type {
#define MT_CRXV_HE_BEAM_CHNG BIT(13)
#define MT_CRXV_HE_DOPPLER BIT(16)
-struct mt7915_rxv {
- u32 phy;
-
- /* P-RXV: bit 0~1, C-RXV: bit 2~19 */
- __le32 v[20];
-};
-
enum tx_header_format {
MT_HDR_FORMAT_802_3,
MT_HDR_FORMAT_CMD,
--
2.18.0
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2020-07-01 8:13 [PATCH] mt76: mt7915: avoid memcpy in rxv operation Ryder Lee
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