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Updated and refreshed patches.

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Renamed patches to keep their original numbering from codelinaro.org
Fixed minor bugs and added support for the qca-nss-drv-l2tpv2 module
This commit is contained in:
SqTER-PL
2025-03-09 21:32:46 +01:00
committed by Lucas Asvio
parent b93287296b
commit 5536c2039e
70 changed files with 617 additions and 399 deletions
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109
target/linux/ipq806x/patches-6.6/990-0184-net-add-fast-xmit-api.patch Normal file
View File

@@ -0,0 +1,109 @@
From 04d249769b277035aeaac85ac2a73a85ec163fcb Mon Sep 17 00:00:00 2001
From: Ken Zhu <quic_guigenz@quicinc.com>
Date: Tue, 25 Jan 2022 16:09:56 -0800
Subject: [PATCH 178/500] net: add fast xmit api
this new function bypass most validation on the skb, and call
netdev_start_xmit directly from this function.
Change-Id: Ifc9019370a7a3839945ca83e24d675fd898c23c1
Signed-off-by: Ken Zhu <quic_guigenz@quicinc.com>
---
include/linux/netdevice.h | 2 ++
net/core/dev.c | 74 +++++++++++++++++++++++++++++++++++++++
2 files changed, 76 insertions(+)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3183,6 +3183,8 @@ static inline int dev_direct_xmit(struct
return ret;
}
+bool dev_fast_xmit(struct sk_buff *skb, struct net_device *dev,
+ netdev_features_t features);
int register_netdevice(struct net_device *dev);
void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
void unregister_netdevice_many(struct list_head *head);
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4329,6 +4329,80 @@ struct netdev_queue *netdev_core_pick_tx
}
/**
+ * dev_fast_xmit - fast xmit the skb
+ * @skb:buffer to transmit
+ * @dev: the device to be transmited to
+ * @features: the skb features could bed used
+ * sucessful return true
+ * failed return false
+ */
+bool dev_fast_xmit(struct sk_buff *skb,
+ struct net_device *dev,
+ netdev_features_t features)
+{
+ struct netdev_queue *txq;
+ int cpu;
+ netdev_tx_t rc;
+
+ if (unlikely(!(dev->flags & IFF_UP))) {
+ return false;
+ }
+
+ if (unlikely(skb_needs_linearize(skb, features))) {
+ return false;
+ }
+
+ rcu_read_lock_bh();
+ cpu = smp_processor_id();
+
+ /* If device don't need the dst, release it now, otherwise make sure
+ * the refcount increased.
+ */
+ if (likely(dev->priv_flags & IFF_XMIT_DST_RELEASE)) {
+ skb_dst_drop(skb);
+ } else {
+ skb_dst_force(skb);
+ }
+
+ txq = netdev_core_pick_tx(dev, skb, NULL);
+
+ if (likely(txq->xmit_lock_owner != cpu)) {
+#define FAST_HARD_TX_LOCK(features, txq, cpu) { \
+ if ((features & NETIF_F_LLTX) == 0) { \
+ __netif_tx_lock(txq, cpu); \
+ } else { \
+ __netif_tx_acquire(txq); \
+ } \
+}
+
+#define FAST_HARD_TX_UNLOCK(features, txq) { \
+ if ((features & NETIF_F_LLTX) == 0) { \
+ __netif_tx_unlock(txq); \
+ } else { \
+ __netif_tx_release(txq); \
+ } \
+}
+ netdev_features_t dev_features = dev->features;
+ FAST_HARD_TX_LOCK(dev_features, txq, cpu);
+ if (likely(!netif_xmit_stopped(txq))) {
+ rc = netdev_start_xmit(skb, dev, txq, 0);
+ if (unlikely(!dev_xmit_complete(rc))) {
+ FAST_HARD_TX_UNLOCK(dev_features, txq);
+ goto fail;
+ }
+ FAST_HARD_TX_UNLOCK(dev_features, txq);
+ rcu_read_unlock_bh();
+ return true;
+ }
+ FAST_HARD_TX_UNLOCK(dev_features, txq);
+ }
+fail:
+ rcu_read_unlock_bh();
+ return false;
+}
+EXPORT_SYMBOL(dev_fast_xmit);
+
+/**
* __dev_queue_xmit() - transmit a buffer
* @skb: buffer to transmit
* @sb_dev: suboordinate device used for L2 forwarding offload