kernel: add linux 4.4 support

Based on 4.4-rc3. Runtime tested on MIPS.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@47701 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 161 insertions, 0 deletions

diff --git a/target/linux/generic/patches-4.4/721-phy_packets.patch b/target/linux/generic/patches-4.4/721-phy_packets.patch
new file mode 100644
index 0000000000..08165087e4
--- /dev/null
+++ b/target/linux/generic/patches-4.4/721-phy_packets.patch
@@ -0,0 +1,161 @@
+--- a/include/linux/netdevice.h
++++ b/include/linux/netdevice.h
+@@ -1297,6 +1297,7 @@ enum netdev_priv_flags {
+ 	IFF_NO_QUEUE			= 1<<21,
+ 	IFF_OPENVSWITCH			= 1<<22,
+ 	IFF_L3MDEV_SLAVE		= 1<<23,
++	IFF_NO_IP_ALIGN			= 1<<24,
+ };
+ 
+ #define IFF_802_1Q_VLAN			IFF_802_1Q_VLAN
+@@ -1323,6 +1324,7 @@ enum netdev_priv_flags {
+ #define IFF_NO_QUEUE			IFF_NO_QUEUE
+ #define IFF_OPENVSWITCH			IFF_OPENVSWITCH
+ #define IFF_L3MDEV_SLAVE		IFF_L3MDEV_SLAVE
++#define IFF_NO_IP_ALIGN			IFF_NO_IP_ALIGN
+ 
+ /**
+  *	struct net_device - The DEVICE structure.
+@@ -1602,6 +1604,11 @@ struct net_device {
+ 	const struct l3mdev_ops	*l3mdev_ops;
+ #endif
+ 
++#ifdef CONFIG_ETHERNET_PACKET_MANGLE
++	void (*eth_mangle_rx)(struct net_device *dev, struct sk_buff *skb);
++	struct sk_buff *(*eth_mangle_tx)(struct net_device *dev, struct sk_buff *skb);
++#endif
++
+ 	const struct header_ops *header_ops;
+ 
+ 	unsigned int		flags;
+@@ -1668,6 +1675,10 @@ struct net_device {
+ 	struct mpls_dev __rcu	*mpls_ptr;
+ #endif
+ 
++#ifdef CONFIG_ETHERNET_PACKET_MANGLE
++	void			*phy_ptr; /* PHY device specific data */
++#endif
++
+ /*
+  * Cache lines mostly used on receive path (including eth_type_trans())
+  */
+--- a/include/linux/skbuff.h
++++ b/include/linux/skbuff.h
+@@ -2185,6 +2185,10 @@ static inline int pskb_trim(struct sk_bu
+ 	return (len < skb->len) ? __pskb_trim(skb, len) : 0;
+ }
+ 
++extern struct sk_buff *__netdev_alloc_skb_ip_align(struct net_device *dev,
++		unsigned int length, gfp_t gfp);
++
++
+ /**
+  *	pskb_trim_unique - remove end from a paged unique (not cloned) buffer
+  *	@skb: buffer to alter
+@@ -2307,16 +2311,6 @@ static inline struct sk_buff *dev_alloc_
+ }
+ 
+ 
+-static inline struct sk_buff *__netdev_alloc_skb_ip_align(struct net_device *dev,
+-		unsigned int length, gfp_t gfp)
+-{
+-	struct sk_buff *skb = __netdev_alloc_skb(dev, length + NET_IP_ALIGN, gfp);
+-
+-	if (NET_IP_ALIGN && skb)
+-		skb_reserve(skb, NET_IP_ALIGN);
+-	return skb;
+-}
+-
+ static inline struct sk_buff *netdev_alloc_skb_ip_align(struct net_device *dev,
+ 		unsigned int length)
+ {
+--- a/net/Kconfig
++++ b/net/Kconfig
+@@ -25,6 +25,12 @@ menuconfig NET
+ 
+ if NET
+ 
++config ETHERNET_PACKET_MANGLE
++	bool
++	help
++	  This option can be selected by phy drivers that need to mangle
++	  packets going in or out of an ethernet device.
++
+ config WANT_COMPAT_NETLINK_MESSAGES
+ 	bool
+ 	help
+--- a/net/core/dev.c
++++ b/net/core/dev.c
+@@ -2708,10 +2708,20 @@ static int xmit_one(struct sk_buff *skb,
+ 	if (!list_empty(&ptype_all) || !list_empty(&dev->ptype_all))
+ 		dev_queue_xmit_nit(skb, dev);
+ 
+-	len = skb->len;
+-	trace_net_dev_start_xmit(skb, dev);
+-	rc = netdev_start_xmit(skb, dev, txq, more);
+-	trace_net_dev_xmit(skb, rc, dev, len);
++#ifdef CONFIG_ETHERNET_PACKET_MANGLE
++	if (!dev->eth_mangle_tx ||
++	    (skb = dev->eth_mangle_tx(dev, skb)) != NULL)
++#else
++	if (1)
++#endif
++	{
++		len = skb->len;
++		trace_net_dev_start_xmit(skb, dev);
++		rc = netdev_start_xmit(skb, dev, txq, more);
++		trace_net_dev_xmit(skb, rc, dev, len);
++	} else {
++		rc = NETDEV_TX_OK;
++	}
+ 
+ 	return rc;
+ }
+--- a/net/core/skbuff.c
++++ b/net/core/skbuff.c
+@@ -63,6 +63,7 @@
+ #include <linux/errqueue.h>
+ #include <linux/prefetch.h>
+ #include <linux/if_vlan.h>
++#include <linux/if.h>
+ 
+ #include <net/protocol.h>
+ #include <net/dst.h>
+@@ -518,6 +519,22 @@ skb_fail:
+ }
+ EXPORT_SYMBOL(__napi_alloc_skb);
+ 
++struct sk_buff *__netdev_alloc_skb_ip_align(struct net_device *dev,
++		unsigned int length, gfp_t gfp)
++{
++	struct sk_buff *skb = __netdev_alloc_skb(dev, length + NET_IP_ALIGN, gfp);
++
++#ifdef CONFIG_ETHERNET_PACKET_MANGLE
++	if (dev && (dev->priv_flags & IFF_NO_IP_ALIGN))
++		return skb;
++#endif
++
++	if (NET_IP_ALIGN && skb)
++		skb_reserve(skb, NET_IP_ALIGN);
++	return skb;
++}
++EXPORT_SYMBOL(__netdev_alloc_skb_ip_align);
++
+ void skb_add_rx_frag(struct sk_buff *skb, int i, struct page *page, int off,
+ 		     int size, unsigned int truesize)
+ {
+--- a/net/ethernet/eth.c
++++ b/net/ethernet/eth.c
+@@ -168,6 +168,12 @@ __be16 eth_type_trans(struct sk_buff *sk
+ 	const struct ethhdr *eth;
+ 
+ 	skb->dev = dev;
++
++#ifdef CONFIG_ETHERNET_PACKET_MANGLE
++	if (dev->eth_mangle_rx)
++		dev->eth_mangle_rx(dev, skb);
++#endif
++
+ 	skb_reset_mac_header(skb);
+ 
+ 	eth = (struct ethhdr *)skb->data;