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From: Ryder Lee <ryder.lee@mediatek.com>
Date: Fri, 28 May 2021 14:05:43 +0800
Subject: [PATCH] mac80211: add rate control support for encap offload
The software rate control cannot deal with encap offload, so fix it.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
---
--- a/net/mac80211/rate.c
+++ b/net/mac80211/rate.c
@@ -297,15 +297,11 @@ void ieee80211_check_rate_mask(struct ie
static bool rc_no_data_or_no_ack_use_min(struct ieee80211_tx_rate_control *txrc)
{
struct sk_buff *skb = txrc->skb;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- __le16 fc;
-
- fc = hdr->frame_control;
return (info->flags & (IEEE80211_TX_CTL_NO_ACK |
IEEE80211_TX_CTL_USE_MINRATE)) ||
- !ieee80211_is_data(fc);
+ !ieee80211_is_tx_data(skb);
}
static void rc_send_low_basicrate(struct ieee80211_tx_rate *rate,
@@ -396,6 +392,10 @@ static bool rate_control_send_low(struct
int mcast_rate;
bool use_basicrate = false;
+ if (ieee80211_is_tx_data(txrc->skb) &&
+ info->flags & IEEE80211_TX_CTL_NO_ACK)
+ return false;
+
if (!pubsta || rc_no_data_or_no_ack_use_min(txrc)) {
__rate_control_send_low(txrc->hw, sband, pubsta, info,
txrc->rate_idx_mask);
@@ -870,7 +870,6 @@ void ieee80211_get_tx_rates(struct ieee8
int max_rates)
{
struct ieee80211_sub_if_data *sdata;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_supported_band *sband;
@@ -882,7 +881,7 @@ void ieee80211_get_tx_rates(struct ieee8
sdata = vif_to_sdata(vif);
sband = sdata->local->hw.wiphy->bands[info->band];
- if (ieee80211_is_data(hdr->frame_control))
+ if (ieee80211_is_tx_data(skb))
rate_control_apply_mask(sdata, sta, sband, dest, max_rates);
if (dest[0].idx < 0)
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -679,6 +679,7 @@ ieee80211_tx_h_rate_ctrl(struct ieee8021
u32 len;
struct ieee80211_tx_rate_control txrc;
struct ieee80211_sta_rates *ratetbl = NULL;
+ bool encap = info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP;
bool assoc = false;
memset(&txrc, 0, sizeof(txrc));
@@ -720,7 +721,7 @@ ieee80211_tx_h_rate_ctrl(struct ieee8021
* just wants a probe response.
*/
if (tx->sdata->vif.bss_conf.use_short_preamble &&
- (ieee80211_is_data(hdr->frame_control) ||
+ (ieee80211_is_tx_data(tx->skb) ||
(tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
txrc.short_preamble = true;
@@ -742,7 +743,8 @@ ieee80211_tx_h_rate_ctrl(struct ieee8021
"%s: Dropped data frame as no usable bitrate found while "
"scanning and associated. Target station: "
"%pM on %d GHz band\n",
- tx->sdata->name, hdr->addr1,
+ tx->sdata->name,
+ encap ? ((struct ethhdr *)hdr)->h_dest : hdr->addr1,
info->band ? 5 : 2))
return TX_DROP;
@@ -776,7 +778,7 @@ ieee80211_tx_h_rate_ctrl(struct ieee8021
if (txrc.reported_rate.idx < 0) {
txrc.reported_rate = tx->rate;
- if (tx->sta && ieee80211_is_data(hdr->frame_control))
+ if (tx->sta && ieee80211_is_tx_data(tx->skb))
tx->sta->tx_stats.last_rate = txrc.reported_rate;
} else if (tx->sta)
tx->sta->tx_stats.last_rate = txrc.reported_rate;
@@ -3660,8 +3662,16 @@ begin:
else
info->flags &= ~IEEE80211_TX_CTL_AMPDU;
- if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)
+ if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) {
+ if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
+ r = ieee80211_tx_h_rate_ctrl(&tx);
+ if (r != TX_CONTINUE) {
+ ieee80211_free_txskb(&local->hw, skb);
+ goto begin;
+ }
+ }
goto encap_out;
+ }
if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
struct sta_info *sta = container_of(txq->sta, struct sta_info,
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -6728,4 +6728,22 @@ struct sk_buff *ieee80211_get_fils_disco
struct sk_buff *
ieee80211_get_unsol_bcast_probe_resp_tmpl(struct ieee80211_hw *hw,
struct ieee80211_vif *vif);
+
+/**
+ * ieee80211_is_tx_data - check if frame is a data frame
+ *
+ * The function is used to check if a frame is a data frame. Frames with
+ * hardware encapsulation enabled are data frames.
+ *
+ * @skb: the frame to be transmitted.
+ */
+static inline bool ieee80211_is_tx_data(struct sk_buff *skb)
+{
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_hdr *hdr = (void *) skb->data;
+
+ return info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP ||
+ ieee80211_is_data(hdr->frame_control);
+}
+
#endif /* MAC80211_H */
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