[RFC] ath10k: add tx hw 802.11 encapsulation offloading support
Zhijun You
hujy652 at gmail.com
Mon May 24 03:31:30 PDT 2021
This patch adds support of encap offload for ath10k which uses ethernet
datapath. The feature is enabled via a new module parmeter.
If enabled, the driver will enable the feature on a per vif basis if the requirements
are met.
Currently only implement for 32bit target with 3-addr AP and STA mode.
Improves TCP throughput when the feature is enabled.
Tested-on: QCA9984 firmware version 10.4-3.9.0.2-00131(Netgear R7800)
Co-developed-by: Vasanthakumar Thiagarajan <vthiagar at qti.qualcomm.com>
Signed-off-by: Vasanthakumar Thiagarajan <vthiagar at qti.qualcomm.com>
Co-developed-by: John Crispin <john at phrozen.org>
Signed-off-by: John Crispin <john at phrozen.org>
Signed-off-by: Zhijun You <hujy652 at gmail.com>
---
RFC because it's been almost two years since the original patch was
sent.
Changes since original John Crispin's v10 patch
* check if the target is 32bit
* remove the ATH10K_SKB_F_HW_80211_ENCAP flag and use tx_info flag
instead
* add ath10k_mac_op_update_vif_offload function for runtime change
Should we use a module param for frame mode like in ath11k instead a
dedicated param for each datapath and should we try to use
tx_status_ext()?
---
drivers/net/wireless/ath/ath10k/core.c | 15 ++++
drivers/net/wireless/ath/ath10k/core.h | 2 +
drivers/net/wireless/ath/ath10k/htt_tx.c | 25 ++++---
drivers/net/wireless/ath/ath10k/mac.c | 95 ++++++++++++++++++------
drivers/net/wireless/ath/ath10k/txrx.c | 8 +-
5 files changed, 110 insertions(+), 35 deletions(-)
diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 2f9be182fbfb..2031c8d4e358 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -34,6 +34,7 @@ static bool uart_print;
static bool skip_otp;
static bool rawmode;
static bool fw_diag_log;
+static bool ethernetmode;
unsigned long ath10k_coredump_mask = BIT(ATH10K_FW_CRASH_DUMP_REGISTERS) |
BIT(ATH10K_FW_CRASH_DUMP_CE_DATA);
@@ -46,6 +47,7 @@ module_param(skip_otp, bool, 0644);
module_param(rawmode, bool, 0644);
module_param(fw_diag_log, bool, 0644);
module_param_named(coredump_mask, ath10k_coredump_mask, ulong, 0444);
+module_param(ethernetmode, bool, 0644);
MODULE_PARM_DESC(debug_mask, "Debugging mask");
MODULE_PARM_DESC(uart_print, "Uart target debugging");
@@ -54,6 +56,7 @@ MODULE_PARM_DESC(cryptmode, "Crypto mode: 0-hardware, 1-software");
MODULE_PARM_DESC(rawmode, "Use raw 802.11 frame datapath");
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");
+MODULE_PARM_DESC(ethernetmode, "Use ethernet frame datapath");
static const struct ath10k_hw_params ath10k_hw_params_list[] = {
{
@@ -3281,12 +3284,24 @@ static void ath10k_core_register_work(struct work_struct *work)
/* peer stats are enabled by default */
set_bit(ATH10K_FLAG_PEER_STATS, &ar->dev_flags);
+ if (ethernetmode && rawmode) {
+ ath10k_err(ar, "invalid configuration, ethernet and rawmode data path can not coexist\n");
+ status = -EINVAL;
+ goto err;
+ }
+
status = ath10k_core_probe_fw(ar);
if (status) {
ath10k_err(ar, "could not probe fw (%d)\n", status);
goto err;
}
+ /* Ethernet mode only works for 32bit target */
+ if (!ar->hw_params.target_64bit && ethernetmode)
+ ar->ethernetmode = true;
+ else
+ ar->ethernetmode = false;
+
status = ath10k_mac_register(ar);
if (status) {
ath10k_err(ar, "could not register to mac80211 (%d)\n", status);
diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index 648ed36f845f..f119c04fb5fe 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -1298,6 +1298,8 @@ struct ath10k {
s32 tx_power_2g_limit;
s32 tx_power_5g_limit;
+ bool ethernetmode;
+
/* must be last */
u8 drv_priv[] __aligned(sizeof(void *));
};
diff --git a/drivers/net/wireless/ath/ath10k/htt_tx.c b/drivers/net/wireless/ath/ath10k/htt_tx.c
index d6b8bdcef416..968d9f63f222 100644
--- a/drivers/net/wireless/ath/ath10k/htt_tx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_tx.c
@@ -1188,8 +1188,11 @@ static u8 ath10k_htt_tx_get_tid(struct sk_buff *skb, bool is_eth)
{
struct ieee80211_hdr *hdr = (void *)skb->data;
struct ath10k_skb_cb *cb = ATH10K_SKB_CB(skb);
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- if (!is_eth && ieee80211_is_mgmt(hdr->frame_control))
+ if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)
+ return skb->priority & IEEE80211_QOS_CTL_TID_MASK;
+ else if (!is_eth && ieee80211_is_mgmt(hdr->frame_control))
return HTT_DATA_TX_EXT_TID_MGMT;
else if (cb->flags & ATH10K_SKB_F_QOS)
return skb->priority & IEEE80211_QOS_CTL_TID_MASK;
@@ -1436,15 +1439,17 @@ static int ath10k_htt_tx_32(struct ath10k_htt *htt,
txbuf_paddr = htt->txbuf.paddr +
(sizeof(struct ath10k_htt_txbuf_32) * msdu_id);
- if ((ieee80211_is_action(hdr->frame_control) ||
- ieee80211_is_deauth(hdr->frame_control) ||
- ieee80211_is_disassoc(hdr->frame_control)) &&
- ieee80211_has_protected(hdr->frame_control)) {
- skb_put(msdu, IEEE80211_CCMP_MIC_LEN);
- } else if (!(skb_cb->flags & ATH10K_SKB_F_NO_HWCRYPT) &&
- txmode == ATH10K_HW_TXRX_RAW &&
- ieee80211_has_protected(hdr->frame_control)) {
- skb_put(msdu, IEEE80211_CCMP_MIC_LEN);
+ if (!(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) {
+ if ((ieee80211_is_action(hdr->frame_control) ||
+ ieee80211_is_deauth(hdr->frame_control) ||
+ ieee80211_is_disassoc(hdr->frame_control)) &&
+ ieee80211_has_protected(hdr->frame_control)) {
+ skb_put(msdu, IEEE80211_CCMP_MIC_LEN);
+ } else if (!(skb_cb->flags & ATH10K_SKB_F_NO_HWCRYPT) &&
+ txmode == ATH10K_HW_TXRX_RAW &&
+ ieee80211_has_protected(hdr->frame_control)) {
+ skb_put(msdu, IEEE80211_CCMP_MIC_LEN);
+ }
}
skb_cb->paddr = dma_map_single(dev, msdu->data, msdu->len,
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index bb6c5ee43ac0..ee64039c3726 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -3703,12 +3703,16 @@ ath10k_mac_tx_h_get_txmode(struct ath10k *ar,
struct sk_buff *skb)
{
const struct ieee80211_hdr *hdr = (void *)skb->data;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
const struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
__le16 fc = hdr->frame_control;
if (!vif || vif->type == NL80211_IFTYPE_MONITOR)
return ATH10K_HW_TXRX_RAW;
+ if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)
+ return ATH10K_HW_TXRX_ETHERNET;
+
if (ieee80211_is_mgmt(fc))
return ATH10K_HW_TXRX_MGMT;
@@ -3866,6 +3870,13 @@ static void ath10k_mac_tx_h_fill_cb(struct ath10k *ar,
bool noack = false;
cb->flags = 0;
+ cb->vif = vif;
+ cb->txq = txq;
+ cb->airtime_est = airtime;
+
+ if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)
+ return;
+
if (!ath10k_tx_h_use_hwcrypto(vif, skb))
cb->flags |= ATH10K_SKB_F_NO_HWCRYPT;
@@ -3904,9 +3915,6 @@ static void ath10k_mac_tx_h_fill_cb(struct ath10k *ar,
cb->flags |= ATH10K_SKB_F_RAW_TX;
}
- cb->vif = vif;
- cb->txq = txq;
- cb->airtime_est = airtime;
if (sta) {
arsta = (struct ath10k_sta *)sta->drv_priv;
spin_lock_bh(&ar->data_lock);
@@ -4015,6 +4023,9 @@ static int ath10k_mac_tx(struct ath10k *ar,
const struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
int ret;
+ if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)
+ goto skip_encap;
+
/* We should disable CCK RATE due to P2P */
if (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE)
ath10k_dbg(ar, ATH10K_DBG_MAC, "IEEE80211_TX_CTL_NO_CCK_RATE\n");
@@ -4038,6 +4049,7 @@ static int ath10k_mac_tx(struct ath10k *ar,
}
}
+skip_encap:
if (!noque_offchan && info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) {
if (!ath10k_mac_tx_frm_has_freq(ar)) {
ath10k_dbg(ar, ATH10K_DBG_MAC, "mac queued offchannel skb %pK len %d\n",
@@ -4087,6 +4099,7 @@ void ath10k_offchan_tx_work(struct work_struct *work)
int ret;
unsigned long time_left;
bool tmp_peer_created = false;
+ struct ieee80211_tx_info *info;
/* FW requirement: We must create a peer before FW will send out
* an offchannel frame. Otherwise the frame will be stuck and
@@ -4106,8 +4119,13 @@ void ath10k_offchan_tx_work(struct work_struct *work)
ath10k_dbg(ar, ATH10K_DBG_MAC, "mac offchannel skb %pK len %d\n",
skb, skb->len);
- hdr = (struct ieee80211_hdr *)skb->data;
- peer_addr = ieee80211_get_DA(hdr);
+ info = IEEE80211_SKB_CB(skb);
+ if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) {
+ peer_addr = skb->data;
+ } else {
+ hdr = (struct ieee80211_hdr *)skb->data;
+ peer_addr = ieee80211_get_DA(hdr);
+ }
spin_lock_bh(&ar->data_lock);
vdev_id = ar->scan.vdev_id;
@@ -4639,7 +4657,7 @@ static void ath10k_mac_op_tx(struct ieee80211_hw *hw,
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;
+ struct ieee80211_hdr *hdr;
enum ath10k_hw_txrx_mode txmode;
enum ath10k_mac_tx_path txpath;
bool is_htt;
@@ -4659,7 +4677,6 @@ static void ath10k_mac_op_tx(struct ieee80211_hw *hw,
if (is_htt) {
spin_lock_bh(&ar->htt.tx_lock);
- is_presp = ieee80211_is_probe_resp(hdr->frame_control);
ret = ath10k_htt_tx_inc_pending(htt);
if (ret) {
@@ -4670,14 +4687,19 @@ static void ath10k_mac_op_tx(struct ieee80211_hw *hw,
return;
}
- ret = ath10k_htt_tx_mgmt_inc_pending(htt, is_mgmt, is_presp);
- if (ret) {
- ath10k_dbg(ar, ATH10K_DBG_MAC, "failed to increase tx mgmt pending count: %d, dropping\n",
- ret);
- ath10k_htt_tx_dec_pending(htt);
- spin_unlock_bh(&ar->htt.tx_lock);
- ieee80211_free_txskb(ar->hw, skb);
- return;
+ if (is_mgmt) {
+ hdr = (struct ieee80211_hdr *)skb->data;
+ is_presp = ieee80211_is_probe_resp(hdr->frame_control);
+
+ ret = ath10k_htt_tx_mgmt_inc_pending(htt, is_mgmt, is_presp);
+ if (ret) {
+ ath10k_dbg(ar, ATH10K_DBG_MAC, "failed to increase tx mgmt pending count: %d, dropping\n",
+ ret);
+ ath10k_htt_tx_dec_pending(htt);
+ spin_unlock_bh(&ar->htt.tx_lock);
+ ieee80211_free_txskb(ar->hw, skb);
+ return;
+ }
}
spin_unlock_bh(&ar->htt.tx_lock);
}
@@ -5441,6 +5463,36 @@ static int ath10k_mac_set_txbf_conf(struct ath10k_vif *arvif)
ar->wmi.vdev_param->txbf, value);
}
+static void ath10k_mac_op_update_vif_offload(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif)
+{
+ struct ath10k *ar = hw->priv;
+ struct ath10k_vif *arvif = (void *)vif->drv_priv;
+ u32 vdev_param, param_value;
+ int ret;
+
+ if (!ar->ethernetmode ||
+ (vif->type != NL80211_IFTYPE_STATION &&
+ vif->type != NL80211_IFTYPE_AP))
+ vif->offload_flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
+
+ if (vif->offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED)
+ param_value = ATH10K_HW_TXRX_ETHERNET;
+ else
+ param_value = ATH10K_HW_TXRX_NATIVE_WIFI;
+
+ vdev_param = ar->wmi.vdev_param->tx_encap_type;
+ ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param,
+ param_value);
+
+ /* 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);
+ vif->offload_flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
+ }
+}
+
/*
* TODO:
* Figure out how to handle WMI_VDEV_SUBTYPE_P2P_DEVICE,
@@ -5634,15 +5686,7 @@ static int ath10k_add_interface(struct ieee80211_hw *hw,
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_mac_op_update_vif_offload(hw, vif);
/* Configuring number of spatial stream for monitor interface is causing
* target assert in qca9888 and qca6174.
@@ -9327,6 +9371,7 @@ static const struct ieee80211_ops ath10k_ops = {
.config = ath10k_config,
.add_interface = ath10k_add_interface,
.remove_interface = ath10k_remove_interface,
+ .update_vif_offload = ath10k_mac_op_update_vif_offload,
.configure_filter = ath10k_configure_filter,
.bss_info_changed = ath10k_bss_info_changed,
.set_coverage_class = ath10k_mac_op_set_coverage_class,
@@ -9936,6 +9981,8 @@ int ath10k_mac_register(struct ath10k *ar)
ieee80211_hw_set(ar->hw, QUEUE_CONTROL);
ieee80211_hw_set(ar->hw, SUPPORTS_TX_FRAG);
ieee80211_hw_set(ar->hw, REPORTS_LOW_ACK);
+ if (ar->ethernetmode)
+ ieee80211_hw_set(ar->hw, SUPPORTS_TX_ENCAP_OFFLOAD);
if (!test_bit(ATH10K_FLAG_RAW_MODE, &ar->dev_flags))
ieee80211_hw_set(ar->hw, SW_CRYPTO_CONTROL);
diff --git a/drivers/net/wireless/ath/ath10k/txrx.c b/drivers/net/wireless/ath/ath10k/txrx.c
index 7c9ea0c073d8..5876381f27cd 100644
--- a/drivers/net/wireless/ath/ath10k/txrx.c
+++ b/drivers/net/wireless/ath/ath10k/txrx.c
@@ -51,6 +51,7 @@ int ath10k_txrx_tx_unref(struct ath10k_htt *htt,
struct ath10k_txq *artxq;
struct sk_buff *msdu;
u8 flags;
+ struct ieee80211_vif *vif;
ath10k_dbg(ar, ATH10K_DBG_HTT,
"htt tx completion msdu_id %u status %d\n",
@@ -80,6 +81,8 @@ int ath10k_txrx_tx_unref(struct ath10k_htt *htt,
}
flags = skb_cb->flags;
+ vif = skb_cb->vif;
+
ath10k_htt_tx_free_msdu_id(htt, tx_done->msdu_id);
ath10k_htt_tx_dec_pending(htt);
if (htt->num_pending_tx == 0)
@@ -130,7 +133,10 @@ int ath10k_txrx_tx_unref(struct ath10k_htt *htt,
info->status.is_valid_ack_signal = true;
}
- ieee80211_tx_status(htt->ar->hw, msdu);
+ if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)
+ ieee80211_tx_status_8023(htt->ar->hw, vif, msdu);
+ else
+ ieee80211_tx_status(htt->ar->hw, msdu);
/* we do not own the msdu anymore */
return 0;
--
2.25.1
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