From 19817fa3f566eae499544cdb36bd68fe3d46a3cc Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Thu, 2 Mar 2023 14:03:47 +0100 Subject: [PATCH] mac80211: add mesh fast-rx support This helps bring down rx CPU usage by avoiding calls to the rx handlers in the slow path. Supports forwarding and local rx, including A-MSDU. Signed-off-by: Felix Fietkau --- ...fi-mac80211-add-mesh-fast-rx-support.patch | 77 +++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 package/kernel/mac80211/patches/subsys/326-wifi-mac80211-add-mesh-fast-rx-support.patch diff --git a/package/kernel/mac80211/patches/subsys/326-wifi-mac80211-add-mesh-fast-rx-support.patch b/package/kernel/mac80211/patches/subsys/326-wifi-mac80211-add-mesh-fast-rx-support.patch new file mode 100644 index 0000000000..b2b94d026b --- /dev/null +++ b/package/kernel/mac80211/patches/subsys/326-wifi-mac80211-add-mesh-fast-rx-support.patch @@ -0,0 +1,77 @@ +From: Felix Fietkau +Date: Thu, 2 Mar 2023 13:52:29 +0100 +Subject: [PATCH] wifi: mac80211: add mesh fast-rx support + +This helps bring down rx CPU usage by avoiding calls to the rx handlers in +the slow path. Supports forwarding and local rx, including A-MSDU. + +Signed-off-by: Felix Fietkau +--- + +--- a/net/mac80211/rx.c ++++ b/net/mac80211/rx.c +@@ -4572,6 +4572,12 @@ void ieee80211_check_fast_rx(struct sta_ + } + + break; ++ case NL80211_IFTYPE_MESH_POINT: ++ fastrx.expected_ds_bits = cpu_to_le16(IEEE80211_FCTL_FROMDS | ++ IEEE80211_FCTL_TODS); ++ fastrx.da_offs = offsetof(struct ieee80211_hdr, addr3); ++ fastrx.sa_offs = offsetof(struct ieee80211_hdr, addr4); ++ break; + default: + goto clear; + } +@@ -4780,6 +4786,7 @@ static bool ieee80211_invoke_fast_rx(str + struct sk_buff *skb = rx->skb; + struct ieee80211_hdr *hdr = (void *)skb->data; + struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); ++ static ieee80211_rx_result res; + int orig_len = skb->len; + int hdrlen = ieee80211_hdrlen(hdr->frame_control); + int snap_offs = hdrlen; +@@ -4841,7 +4848,8 @@ static bool ieee80211_invoke_fast_rx(str + snap_offs += IEEE80211_CCMP_HDR_LEN; + } + +- if (!(status->rx_flags & IEEE80211_RX_AMSDU)) { ++ if (!ieee80211_vif_is_mesh(&rx->sdata->vif) && ++ !(status->rx_flags & IEEE80211_RX_AMSDU)) { + if (!pskb_may_pull(skb, snap_offs + sizeof(*payload))) + return false; + +@@ -4880,13 +4888,29 @@ static bool ieee80211_invoke_fast_rx(str + /* do the header conversion - first grab the addresses */ + ether_addr_copy(addrs.da, skb->data + fast_rx->da_offs); + ether_addr_copy(addrs.sa, skb->data + fast_rx->sa_offs); +- skb_postpull_rcsum(skb, skb->data + snap_offs, +- sizeof(rfc1042_header) + 2); +- /* remove the SNAP but leave the ethertype */ +- skb_pull(skb, snap_offs + sizeof(rfc1042_header)); ++ if (ieee80211_vif_is_mesh(&rx->sdata->vif)) { ++ skb_pull(skb, snap_offs - 2); ++ put_unaligned_be16(skb->len - 2, skb->data); ++ } else { ++ skb_postpull_rcsum(skb, skb->data + snap_offs, ++ sizeof(rfc1042_header) + 2); ++ ++ /* remove the SNAP but leave the ethertype */ ++ skb_pull(skb, snap_offs + sizeof(rfc1042_header)); ++ } + /* push the addresses in front */ + memcpy(skb_push(skb, sizeof(addrs)), &addrs, sizeof(addrs)); + ++ res = ieee80211_rx_mesh_data(rx->sdata, rx->sta, rx->skb); ++ switch (res) { ++ case RX_QUEUED: ++ return true; ++ case RX_CONTINUE: ++ break; ++ default: ++ goto drop; ++ } ++ + ieee80211_rx_8023(rx, fast_rx, orig_len); + + return true; -- 2.30.2