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Date: Thu, 5 Feb 2015 01:35:44 -0800
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: Don Skidmore <donald.c.skidmore@...el.com>, netdev@...r.kernel.org,
nhorman@...hat.com, sassmann@...hat.com, jogreene@...hat.com,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 10/16] ixgbe: add VXLAN offload support for X550 devices
From: Don Skidmore <donald.c.skidmore@...el.com>
Add support VXLAN receive checksum offload in X550 hardware.
Signed-off-by: Don Skidmore <donald.c.skidmore@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/ethernet/intel/Kconfig | 11 +++
drivers/net/ethernet/intel/ixgbe/ixgbe.h | 1 +
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 98 ++++++++++++++++++++++++++-
drivers/net/ethernet/intel/ixgbe/ixgbe_type.h | 5 ++
4 files changed, 113 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/intel/Kconfig b/drivers/net/ethernet/intel/Kconfig
index 4d61ef5..f4ff465 100644
--- a/drivers/net/ethernet/intel/Kconfig
+++ b/drivers/net/ethernet/intel/Kconfig
@@ -192,6 +192,17 @@ config IXGBE
To compile this driver as a module, choose M here. The module
will be called ixgbe.
+config IXGBE_VXLAN
+ bool "Virtual eXtensible Local Area Network Support"
+ default n
+ depends on IXGBE && VXLAN && !(IXGBE=y && VXLAN=m)
+ ---help---
+ This allows one to create VXLAN virtual interfaces that provide
+ Layer 2 Networks over Layer 3 Networks. VXLAN is often used
+ to tunnel virtual network infrastructure in virtualized environments.
+ Say Y here if you want to use Virtual eXtensible Local Area Network
+ (VXLAN) in the driver.
+
config IXGBE_HWMON
bool "Intel(R) 10GbE PCI Express adapters HWMON support"
default y
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
index 38fc64c..699117af 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
@@ -753,6 +753,7 @@ struct ixgbe_adapter {
u32 timer_event_accumulator;
u32 vferr_refcount;
struct ixgbe_mac_addr *mac_table;
+ u16 vxlan_port;
struct kobject *info_kobj;
#ifdef CONFIG_IXGBE_HWMON
struct hwmon_buff *ixgbe_hwmon_buff;
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index e4086fe..065ff48 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -50,6 +50,7 @@
#include <linux/if_bridge.h>
#include <linux/prefetch.h>
#include <scsi/fc/fc_fcoe.h>
+#include <net/vxlan.h>
#ifdef CONFIG_OF
#include <linux/of_net.h>
@@ -1396,12 +1397,23 @@ static inline void ixgbe_rx_checksum(struct ixgbe_ring *ring,
union ixgbe_adv_rx_desc *rx_desc,
struct sk_buff *skb)
{
+ __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
+ __le16 hdr_info = rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
+ bool encap_pkt = false;
+
skb_checksum_none_assert(skb);
/* Rx csum disabled */
if (!(ring->netdev->features & NETIF_F_RXCSUM))
return;
+ if ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_VXLAN)) &&
+ (hdr_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_TUNNEL >> 16))) {
+ encap_pkt = true;
+ skb->encapsulation = 1;
+ skb->ip_summed = CHECKSUM_NONE;
+ }
+
/* if IP and error */
if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&
ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {
@@ -1413,8 +1425,6 @@ static inline void ixgbe_rx_checksum(struct ixgbe_ring *ring,
return;
if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {
- __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
-
/*
* 82599 errata, UDP frames with a 0 checksum can be marked as
* checksum errors.
@@ -1429,6 +1439,17 @@ static inline void ixgbe_rx_checksum(struct ixgbe_ring *ring,
/* It must be a TCP or UDP packet with a valid checksum */
skb->ip_summed = CHECKSUM_UNNECESSARY;
+ if (encap_pkt) {
+ if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_OUTERIPCS))
+ return;
+
+ if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_OUTERIPER)) {
+ ring->rx_stats.csum_err++;
+ return;
+ }
+ /* If we checked the outer header let the stack know */
+ skb->csum_level = 1;
+ }
}
static bool ixgbe_alloc_mapped_page(struct ixgbe_ring *rx_ring,
@@ -5627,6 +5648,10 @@ static int ixgbe_open(struct net_device *netdev)
ixgbe_up_complete(adapter);
+#if IS_ENABLED(CONFIG_IXGBE_VXLAN)
+ vxlan_get_rx_port(netdev);
+
+#endif
return 0;
err_set_queues:
@@ -7771,6 +7796,64 @@ static int ixgbe_set_features(struct net_device *netdev,
return 0;
}
+/**
+ * ixgbe_add_vxlan_port - Get notifications about VXLAN ports that come up
+ * @dev: The port's netdev
+ * @sa_family: Socket Family that VXLAN is notifiying us about
+ * @port: New UDP port number that VXLAN started listening to
+ **/
+static void ixgbe_add_vxlan_port(struct net_device *dev, sa_family_t sa_family,
+ __be16 port)
+{
+ struct ixgbe_adapter *adapter = netdev_priv(dev);
+ struct ixgbe_hw *hw = &adapter->hw;
+ u16 new_port = ntohs(port);
+
+ if (sa_family == AF_INET6)
+ return;
+
+ if (adapter->vxlan_port == new_port) {
+ netdev_info(dev, "Port %d already offloaded\n", new_port);
+ return;
+ }
+
+ if (adapter->vxlan_port) {
+ netdev_info(dev,
+ "Hit Max num of UDP ports, not adding port %d\n",
+ new_port);
+ return;
+ }
+
+ adapter->vxlan_port = new_port;
+ IXGBE_WRITE_REG(hw, IXGBE_VXLANCTRL, new_port);
+}
+
+/**
+ * ixgbe_del_vxlan_port - Get notifications about VXLAN ports that go away
+ * @dev: The port's netdev
+ * @sa_family: Socket Family that VXLAN is notifying us about
+ * @port: UDP port number that VXLAN stopped listening to
+ **/
+static void ixgbe_del_vxlan_port(struct net_device *dev, sa_family_t sa_family,
+ __be16 port)
+{
+ struct ixgbe_adapter *adapter = netdev_priv(dev);
+ struct ixgbe_hw *hw = &adapter->hw;
+ u16 new_port = ntohs(port);
+
+ if (sa_family == AF_INET6)
+ return;
+
+ if (adapter->vxlan_port != new_port) {
+ netdev_info(dev, "Port %d was not found, not deleting\n",
+ new_port);
+ return;
+ }
+
+ adapter->vxlan_port = 0;
+ IXGBE_WRITE_REG(hw, IXGBE_VXLANCTRL, 0);
+}
+
static int ixgbe_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
struct net_device *dev,
const unsigned char *addr, u16 vid,
@@ -7982,6 +8065,8 @@ static const struct net_device_ops ixgbe_netdev_ops = {
.ndo_bridge_getlink = ixgbe_ndo_bridge_getlink,
.ndo_dfwd_add_station = ixgbe_fwd_add,
.ndo_dfwd_del_station = ixgbe_fwd_del,
+ .ndo_add_vxlan_port = ixgbe_add_vxlan_port,
+ .ndo_del_vxlan_port = ixgbe_del_vxlan_port,
};
/**
@@ -8339,6 +8424,15 @@ skip_sriov:
netdev->priv_flags |= IFF_UNICAST_FLT;
netdev->priv_flags |= IFF_SUPP_NOFCS;
+ switch (adapter->hw.mac.type) {
+ case ixgbe_mac_X550:
+ case ixgbe_mac_X550EM_x:
+ netdev->hw_enc_features |= NETIF_F_RXCSUM;
+ break;
+ default:
+ break;
+ }
+
#ifdef CONFIG_IXGBE_DCB
netdev->dcbnl_ops = &dcbnl_ops;
#endif
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
index 1f301ec..38a0e64 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
@@ -399,6 +399,7 @@ struct ixgbe_thermal_sensor_data {
#define IXGBE_WUPL 0x05900
#define IXGBE_WUPM 0x05A00 /* wake up pkt memory 0x5A00-0x5A7C */
+#define IXGBE_VXLANCTRL 0x0000507C /* Rx filter VXLAN UDPPORT Register */
#define IXGBE_FHFT(_n) (0x09000 + ((_n) * 0x100)) /* Flex host filter table */
#define IXGBE_FHFT_EXT(_n) (0x09800 + ((_n) * 0x100)) /* Ext Flexible Host
* Filter Table */
@@ -2122,6 +2123,7 @@ enum {
#define IXGBE_RXD_STAT_IPCS 0x40 /* IP xsum calculated */
#define IXGBE_RXD_STAT_PIF 0x80 /* passed in-exact filter */
#define IXGBE_RXD_STAT_CRCV 0x100 /* Speculative CRC Valid */
+#define IXGBE_RXD_STAT_OUTERIPCS 0x100 /* Cloud IP xsum calculated */
#define IXGBE_RXD_STAT_VEXT 0x200 /* 1st VLAN found */
#define IXGBE_RXD_STAT_UDPV 0x400 /* Valid UDP checksum */
#define IXGBE_RXD_STAT_DYNINT 0x800 /* Pkt caused INT via DYNINT */
@@ -2139,6 +2141,7 @@ enum {
#define IXGBE_RXD_ERR_IPE 0x80 /* IP Checksum Error */
#define IXGBE_RXDADV_ERR_MASK 0xfff00000 /* RDESC.ERRORS mask */
#define IXGBE_RXDADV_ERR_SHIFT 20 /* RDESC.ERRORS shift */
+#define IXGBE_RXDADV_ERR_OUTERIPER 0x04000000 /* CRC IP Header error */
#define IXGBE_RXDADV_ERR_FCEOFE 0x80000000 /* FCoEFe/IPE */
#define IXGBE_RXDADV_ERR_FCERR 0x00700000 /* FCERR/FDIRERR */
#define IXGBE_RXDADV_ERR_FDIR_LEN 0x00100000 /* FDIR Length error */
@@ -2227,6 +2230,8 @@ enum {
#define IXGBE_RXDADV_PKTTYPE_UDP 0x00000200 /* UDP hdr present */
#define IXGBE_RXDADV_PKTTYPE_SCTP 0x00000400 /* SCTP hdr present */
#define IXGBE_RXDADV_PKTTYPE_NFS 0x00000800 /* NFS hdr present */
+#define IXGBE_RXDADV_PKTTYPE_VXLAN 0x00000800 /* VXLAN hdr present */
+#define IXGBE_RXDADV_PKTTYPE_TUNNEL 0x00010000 /* Tunnel type */
#define IXGBE_RXDADV_PKTTYPE_IPSEC_ESP 0x00001000 /* IPSec ESP */
#define IXGBE_RXDADV_PKTTYPE_IPSEC_AH 0x00002000 /* IPSec AH */
#define IXGBE_RXDADV_PKTTYPE_LINKSEC 0x00004000 /* LinkSec Encap */
--
1.9.3
--
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