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openwrt/package/kernel/mac80211/patches/ath10k/081-04-ath10k-add-encapsulation-offloading-support.patch
Zhijun You 00f64ed660 ath10k: backport encapsulation offload support 
This backports encap offload support from upstream.
On some ath10k devices there can be about 10% improvement on tx throughput.
Users can turn it on by setting frame_mode=2.

Signed-off-by: Zhijun You <hujy652@gmail.com>
2022-06-19 12:31:02 +02:00

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From af6d8265c47e46881b80c6b073f53c8c4af52d28 Mon Sep 17 00:00:00 2001
From: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Date: Mon, 16 May 2022 13:26:00 +0300
Subject: ath10k: add encapsulation offloading support
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Frame encapsulation from Ethernet into the IEEE 802.11 frame format
takes a considerable host CPU time on the xmit path. The firmware is
able to do this operation for us, so enable encapsulation offloading for
AP and Sta interface types to improve overall system performance.
The driver is almost ready for encapsulation offloading support. There
are only a few places where the driver assumes the frame format is IEEE
802.11 that need to be fixed.
Encapsulation offloading is currently disabled by default and the driver
utilizes mac80211 encapsulation support. To activate offloading, the
frame_mode=2 parameter should be passed during module loading.
On a QCA9563+QCA9888-based access point in bridged mode, encapsulation
offloading increases TCP 16-streams DL throughput from 365 to 396 mbps
(+8%) and UDP DL throughput from 436 to 483 mbps (+11%).
Tested-on: QCA9888 hw2.0 PCI 10.4-3.9.0.2-00131
Tested-on: QCA6174 hw3.2 PCI WLAN.RM.4.4.1-00157-QCARMSWPZ-1
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Tested-by: Oldřich Jedlička <oldium.pro@gmail.com> # TP-Link Archer C7 v4 & v5 (QCA9563 + QCA9880)
Tested-by: Edward Matijevic <motolav@gmail.com> # TP-Link Archer C2600 (IPQ8064 + QCA9980 10.4.1.00030-1)
Tested-by: Edward Matijevic <motolav@gmail.com> # QCA9377 PCI in Sta mode
Tested-by: Zhijun You <hujy652@gmail.com> # NETGEAR R7800 (QCA9984 10.4-3.9.0.2-00159)
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220516032519.29831-5-ryazanov.s.a@gmail.com
---
drivers/net/wireless/ath/ath10k/core.c | 2 +-
drivers/net/wireless/ath/ath10k/mac.c | 67 +++++++++++++++++++++++++++-------
2 files changed, 55 insertions(+), 14 deletions(-)
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -54,7 +54,7 @@ MODULE_PARM_DESC(uart_print, "Uart targe
MODULE_PARM_DESC(skip_otp, "Skip otp failure for calibration in testmode");
MODULE_PARM_DESC(cryptmode, "Crypto mode: 0-hardware, 1-software");
MODULE_PARM_DESC(frame_mode,
- "Datapath frame mode (0: raw, 1: native wifi (default))");
+ "Datapath frame mode (0: raw, 1: native wifi (default), 2: ethernet)");
MODULE_PARM_DESC(coredump_mask, "Bitfield of what to include in firmware crash file");
MODULE_PARM_DESC(fw_diag_log, "Diag based fw log debugging");
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -3710,6 +3710,9 @@ ath10k_mac_tx_h_get_txmode(struct ath10k
const struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
__le16 fc = hdr->frame_control;
+ if (IEEE80211_SKB_CB(skb)->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)
+ return ATH10K_HW_TXRX_ETHERNET;
+
if (!vif || vif->type == NL80211_IFTYPE_MONITOR)
return ATH10K_HW_TXRX_RAW;
@@ -3870,6 +3873,12 @@ static void ath10k_mac_tx_h_fill_cb(stru
bool noack = false;
cb->flags = 0;
+
+ if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) {
+ cb->flags |= ATH10K_SKB_F_QOS; /* Assume data frames are QoS */
+ goto finish_cb_fill;
+ }
+
if (!ath10k_tx_h_use_hwcrypto(vif, skb))
cb->flags |= ATH10K_SKB_F_NO_HWCRYPT;
@@ -3908,6 +3917,7 @@ static void ath10k_mac_tx_h_fill_cb(stru
cb->flags |= ATH10K_SKB_F_RAW_TX;
}
+finish_cb_fill:
cb->vif = vif;
cb->txq = txq;
cb->airtime_est = airtime;
@@ -4031,7 +4041,11 @@ static int ath10k_mac_tx(struct ath10k *
ath10k_tx_h_seq_no(vif, skb);
break;
case ATH10K_HW_TXRX_ETHERNET:
- ath10k_tx_h_8023(skb);
+ /* Convert 802.11->802.3 header only if the frame was erlier
+ * encapsulated to 802.11 by mac80211. Otherwise pass it as is.
+ */
+ if (!(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP))
+ ath10k_tx_h_8023(skb);
break;
case ATH10K_HW_TXRX_RAW:
if (!test_bit(ATH10K_FLAG_RAW_MODE, &ar->dev_flags) &&
@@ -4643,12 +4657,10 @@ static void ath10k_mac_op_tx(struct ieee
struct ieee80211_vif *vif = info->control.vif;
struct ieee80211_sta *sta = control->sta;
struct ieee80211_txq *txq = NULL;
- struct ieee80211_hdr *hdr = (void *)skb->data;
enum ath10k_hw_txrx_mode txmode;
enum ath10k_mac_tx_path txpath;
bool is_htt;
bool is_mgmt;
- bool is_presp;
int ret;
u16 airtime;
@@ -4662,8 +4674,14 @@ static void ath10k_mac_op_tx(struct ieee
is_mgmt = (txpath == ATH10K_MAC_TX_HTT_MGMT);
if (is_htt) {
+ bool is_presp = false;
+
spin_lock_bh(&ar->htt.tx_lock);
- is_presp = ieee80211_is_probe_resp(hdr->frame_control);
+ if (!(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) {
+ struct ieee80211_hdr *hdr = (void *)skb->data;
+
+ is_presp = ieee80211_is_probe_resp(hdr->frame_control);
+ }
ret = ath10k_htt_tx_inc_pending(htt);
if (ret) {
@@ -5447,6 +5465,30 @@ static int ath10k_mac_set_txbf_conf(stru
ar->wmi.vdev_param->txbf, value);
}
+static void ath10k_update_vif_offload(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif)
+{
+ struct ath10k_vif *arvif = (void *)vif->drv_priv;
+ struct ath10k *ar = hw->priv;
+ u32 vdev_param;
+ int ret;
+
+ if (ath10k_frame_mode != ATH10K_HW_TXRX_ETHERNET ||
+ ar->wmi.vdev_param->tx_encap_type == WMI_VDEV_PARAM_UNSUPPORTED ||
+ (vif->type != NL80211_IFTYPE_STATION &&
+ vif->type != NL80211_IFTYPE_AP))
+ vif->offload_flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
+
+ vdev_param = ar->wmi.vdev_param->tx_encap_type;
+ ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param,
+ ATH10K_HW_TXRX_NATIVE_WIFI);
+ /* 10.X firmware does not support this VDEV parameter. Do not warn */
+ if (ret && ret != -EOPNOTSUPP) {
+ ath10k_warn(ar, "failed to set vdev %i TX encapsulation: %d\n",
+ arvif->vdev_id, ret);
+ }
+}
+
/*
* TODO:
* Figure out how to handle WMI_VDEV_SUBTYPE_P2P_DEVICE,
@@ -5656,15 +5698,7 @@ static int ath10k_add_interface(struct i
arvif->def_wep_key_idx = -1;
- vdev_param = ar->wmi.vdev_param->tx_encap_type;
- ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param,
- ATH10K_HW_TXRX_NATIVE_WIFI);
- /* 10.X firmware does not support this VDEV parameter. Do not warn */
- if (ret && ret != -EOPNOTSUPP) {
- ath10k_warn(ar, "failed to set vdev %i TX encapsulation: %d\n",
- arvif->vdev_id, ret);
- goto err_vdev_delete;
- }
+ ath10k_update_vif_offload(hw, vif);
/* Configuring number of spatial stream for monitor interface is causing
* target assert in qca9888 and qca6174.
@@ -9352,6 +9386,7 @@ static const struct ieee80211_ops ath10k
.stop = ath10k_stop,
.config = ath10k_config,
.add_interface = ath10k_add_interface,
+ .update_vif_offload = ath10k_update_vif_offload,
.remove_interface = ath10k_remove_interface,
.configure_filter = ath10k_configure_filter,
.bss_info_changed = ath10k_bss_info_changed,
@@ -10021,6 +10056,12 @@ int ath10k_mac_register(struct ath10k *a
if (test_bit(WMI_SERVICE_TDLS_UAPSD_BUFFER_STA, ar->wmi.svc_map))
ieee80211_hw_set(ar->hw, SUPPORTS_TDLS_BUFFER_STA);
+ if (ath10k_frame_mode == ATH10K_HW_TXRX_ETHERNET) {
+ if (ar->wmi.vdev_param->tx_encap_type !=
+ WMI_VDEV_PARAM_UNSUPPORTED)
+ ieee80211_hw_set(ar->hw, SUPPORTS_TX_ENCAP_OFFLOAD);
+ }
+
ar->hw->wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
ar->hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
ar->hw->wiphy->max_remain_on_channel_duration = 5000;
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