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ixgbe: add support for geneve Rx offload 

Add geneve Rx offload support for x550em_a.

The implementation follows the vxlan code with the lower 16 bits of
the VXLANCTRL register holding the UDP port for VXLAN and the upper
for Geneve.

Disabled NFS filters in the RFCTL register which allows us to simplify
the check for VXLAN and Geneve packets in ixgbe_rx_checksum().

Removed vxlan from the name of the callback functions and replaced it
with udp_tunnel which is more in line with the new API.

Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Emil Tantilov 2016-08-10 11:19:23 -07:00 committed by Jeff Kirsher
parent c64269710e
commit a21d0822ff
3 changed files with 134 additions and 51 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/ethernet/intel/ixgbe/ixgbe.h
View File

@ -645,6 +645,7 @@ struct ixgbe_adapter {
#define IXGBE_FLAG_RX_HWTSTAMP_ENABLED BIT(25)
#define IXGBE_FLAG_RX_HWTSTAMP_IN_REGISTER BIT(26)
#define IXGBE_FLAG_DCB_CAPABLE BIT(27)
#define IXGBE_FLAG_GENEVE_OFFLOAD_CAPABLE BIT(28)
u32 flags2;
#define IXGBE_FLAG2_RSC_CAPABLE BIT(0)
@ -658,7 +659,7 @@ struct ixgbe_adapter {
#define IXGBE_FLAG2_RSS_FIELD_IPV6_UDP BIT(9)
#define IXGBE_FLAG2_PTP_PPS_ENABLED BIT(10)
#define IXGBE_FLAG2_PHY_INTERRUPT BIT(11)
#define IXGBE_FLAG2_VXLAN_REREG_NEEDED BIT(12)
#define IXGBE_FLAG2_UDP_TUN_REREG_NEEDED BIT(12)
#define IXGBE_FLAG2_VLAN_PROMISC BIT(13)
/* Tx fast path data */
@ -672,6 +673,7 @@ struct ixgbe_adapter {
/* Port number used to identify VXLAN traffic */
__be16 vxlan_port;
__be16 geneve_port;
/* TX */
struct ixgbe_ring *tx_ring[MAX_TX_QUEUES] ____cacheline_aligned_in_smp;

174
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View File

@ -1495,7 +1495,6 @@ static inline void ixgbe_rx_checksum(struct ixgbe_ring *ring,
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);
@ -1504,8 +1503,8 @@ static inline void ixgbe_rx_checksum(struct ixgbe_ring *ring,
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))) {
/* check for VXLAN and Geneve packets */
if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_VXLAN)) {
encap_pkt = true;
skb->encapsulation = 1;
}
@ -3922,6 +3921,9 @@ static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
rfctl &= ~IXGBE_RFCTL_RSC_DIS;
if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
rfctl |= IXGBE_RFCTL_RSC_DIS;
/* disable NFS filtering */
rfctl |= (IXGBE_RFCTL_NFSW_DIS | IXGBE_RFCTL_NFSR_DIS);
IXGBE_WRITE_REG(hw, IXGBE_RFCTL, rfctl);
/* Program registers for the distribution of queues */
@ -4586,18 +4588,23 @@ static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
}
}
static void ixgbe_clear_vxlan_port(struct ixgbe_adapter *adapter)
static void ixgbe_clear_udp_tunnel_port(struct ixgbe_adapter *adapter, u32 mask)
{
switch (adapter->hw.mac.type) {
case ixgbe_mac_X550:
case ixgbe_mac_X550EM_x:
case ixgbe_mac_x550em_a:
IXGBE_WRITE_REG(&adapter->hw, IXGBE_VXLANCTRL, 0);
struct ixgbe_hw *hw = &adapter->hw;
u32 vxlanctrl;
if (!(adapter->flags & (IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE |
IXGBE_FLAG_GENEVE_OFFLOAD_CAPABLE)))
return;
vxlanctrl = IXGBE_READ_REG(hw, IXGBE_VXLANCTRL) && ~mask;
IXGBE_WRITE_REG(hw, IXGBE_VXLANCTRL, vxlanctrl);
if (mask & IXGBE_VXLANCTRL_VXLAN_UDPPORT_MASK)
adapter->vxlan_port = 0;
break;
default:
break;
}
if (mask & IXGBE_VXLANCTRL_GENEVE_UDPPORT_MASK)
adapter->geneve_port = 0;
}
#ifdef CONFIG_IXGBE_DCB
@ -5711,8 +5718,10 @@ static int ixgbe_sw_init(struct ixgbe_adapter *adapter)
if (fwsm & IXGBE_FWSM_TS_ENABLED)
adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
break;
case ixgbe_mac_X550EM_x:
case ixgbe_mac_x550em_a:
adapter->flags |= IXGBE_FLAG_GENEVE_OFFLOAD_CAPABLE;
/* fall through */
case ixgbe_mac_X550EM_x:
#ifdef CONFIG_IXGBE_DCB
adapter->flags &= ~IXGBE_FLAG_DCB_CAPABLE;
#endif
@ -6144,7 +6153,7 @@ int ixgbe_open(struct net_device *netdev)
ixgbe_up_complete(adapter);
ixgbe_clear_vxlan_port(adapter);
ixgbe_clear_udp_tunnel_port(adapter, IXGBE_VXLANCTRL_ALL_UDPPORT_MASK);
udp_tunnel_get_rx_info(netdev);
return 0;
@ -7223,9 +7232,9 @@ static void ixgbe_service_task(struct work_struct *work)
ixgbe_service_event_complete(adapter);
return;
}
if (adapter->flags2 & IXGBE_FLAG2_VXLAN_REREG_NEEDED) {
if (adapter->flags2 & IXGBE_FLAG2_UDP_TUN_REREG_NEEDED) {
rtnl_lock();
adapter->flags2 &= ~IXGBE_FLAG2_VXLAN_REREG_NEEDED;
adapter->flags2 &= ~IXGBE_FLAG2_UDP_TUN_REREG_NEEDED;
udp_tunnel_get_rx_info(adapter->netdev);
rtnl_unlock();
}
@ -7665,6 +7674,10 @@ static void ixgbe_atr(struct ixgbe_ring *ring,
if (adapter->vxlan_port &&
udp_hdr(skb)->dest == adapter->vxlan_port)
hdr.network = skb_inner_network_header(skb);
if (adapter->geneve_port &&
udp_hdr(skb)->dest == adapter->geneve_port)
hdr.network = skb_inner_network_header(skb);
}
/* Currently only IPv4/IPv6 with TCP is supported */
@ -8800,10 +8813,23 @@ static int ixgbe_set_features(struct net_device *netdev,
netdev->features = features;
if ((adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE)) {
if (features & NETIF_F_RXCSUM)
adapter->flags2 |= IXGBE_FLAG2_VXLAN_REREG_NEEDED;
else
ixgbe_clear_vxlan_port(adapter);
if (features & NETIF_F_RXCSUM) {
adapter->flags2 |= IXGBE_FLAG2_UDP_TUN_REREG_NEEDED;
} else {
u32 port_mask = IXGBE_VXLANCTRL_VXLAN_UDPPORT_MASK;
ixgbe_clear_udp_tunnel_port(adapter, port_mask);
}
}
if ((adapter->flags & IXGBE_FLAG_GENEVE_OFFLOAD_CAPABLE)) {
if (features & NETIF_F_RXCSUM) {
adapter->flags2 |= IXGBE_FLAG2_UDP_TUN_REREG_NEEDED;
} else {
u32 port_mask = IXGBE_VXLANCTRL_GENEVE_UDPPORT_MASK;
ixgbe_clear_udp_tunnel_port(adapter, port_mask);
}
}
if (need_reset)
@ -8816,67 +8842,115 @@ static int ixgbe_set_features(struct net_device *netdev,
}
/**
* ixgbe_add_vxlan_port - Get notifications about VXLAN ports that come up
* ixgbe_add_udp_tunnel_port - Get notifications about adding UDP tunnel ports
* @dev: The port's netdev
* @ti: Tunnel endpoint information
**/
static void ixgbe_add_vxlan_port(struct net_device *dev,
struct udp_tunnel_info *ti)
static void ixgbe_add_udp_tunnel_port(struct net_device *dev,
struct udp_tunnel_info *ti)
{
struct ixgbe_adapter *adapter = netdev_priv(dev);
struct ixgbe_hw *hw = &adapter->hw;
__be16 port = ti->port;
if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
return;
u32 port_shift = 0;
u32 reg;
if (ti->sa_family != AF_INET)
return;
if (!(adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE))
return;
switch (ti->type) {
case UDP_TUNNEL_TYPE_VXLAN:
if (!(adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE))
return;
if (adapter->vxlan_port == port)
return;
if (adapter->vxlan_port == port)
return;
if (adapter->vxlan_port) {
netdev_info(dev,
"Hit Max num of VXLAN ports, not adding port %d\n",
ntohs(port));
if (adapter->vxlan_port) {
netdev_info(dev,
"VXLAN port %d set, not adding port %d\n",
ntohs(adapter->vxlan_port),
ntohs(port));
return;
}
adapter->vxlan_port = port;
break;
case UDP_TUNNEL_TYPE_GENEVE:
if (!(adapter->flags & IXGBE_FLAG_GENEVE_OFFLOAD_CAPABLE))
return;
if (adapter->geneve_port == port)
return;
if (adapter->geneve_port) {
netdev_info(dev,
"GENEVE port %d set, not adding port %d\n",
ntohs(adapter->geneve_port),
ntohs(port));
return;
}
port_shift = IXGBE_VXLANCTRL_GENEVE_UDPPORT_SHIFT;
adapter->geneve_port = port;
break;
default:
return;
}
adapter->vxlan_port = port;
IXGBE_WRITE_REG(hw, IXGBE_VXLANCTRL, ntohs(port));
reg = IXGBE_READ_REG(hw, IXGBE_VXLANCTRL) | ntohs(port) << port_shift;
IXGBE_WRITE_REG(hw, IXGBE_VXLANCTRL, reg);
}
/**
* ixgbe_del_vxlan_port - Get notifications about VXLAN ports that go away
* ixgbe_del_udp_tunnel_port - Get notifications about removing UDP tunnel ports
* @dev: The port's netdev
* @ti: Tunnel endpoint information
**/
static void ixgbe_del_vxlan_port(struct net_device *dev,
struct udp_tunnel_info *ti)
static void ixgbe_del_udp_tunnel_port(struct net_device *dev,
struct udp_tunnel_info *ti)
{
struct ixgbe_adapter *adapter = netdev_priv(dev);
u32 port_mask;
if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
if (ti->type != UDP_TUNNEL_TYPE_VXLAN &&
ti->type != UDP_TUNNEL_TYPE_GENEVE)
return;
if (ti->sa_family != AF_INET)
return;
if (!(adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE))
return;
switch (ti->type) {
case UDP_TUNNEL_TYPE_VXLAN:
if (!(adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE))
return;
if (adapter->vxlan_port != ti->port) {
netdev_info(dev, "Port %d was not found, not deleting\n",
ntohs(ti->port));
if (adapter->vxlan_port != ti->port) {
netdev_info(dev, "VXLAN port %d not found\n",
ntohs(ti->port));
return;
}
port_mask = IXGBE_VXLANCTRL_VXLAN_UDPPORT_MASK;
break;
case UDP_TUNNEL_TYPE_GENEVE:
if (!(adapter->flags & IXGBE_FLAG_GENEVE_OFFLOAD_CAPABLE))
return;
if (adapter->geneve_port != ti->port) {
netdev_info(dev, "GENEVE port %d not found\n",
ntohs(ti->port));
return;
}
port_mask = IXGBE_VXLANCTRL_GENEVE_UDPPORT_MASK;
break;
default:
return;
}
ixgbe_clear_vxlan_port(adapter);
adapter->flags2 |= IXGBE_FLAG2_VXLAN_REREG_NEEDED;
ixgbe_clear_udp_tunnel_port(adapter, port_mask);
adapter->flags2 |= IXGBE_FLAG2_UDP_TUN_REREG_NEEDED;
}
static int ixgbe_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
@ -9190,8 +9264,8 @@ 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_udp_tunnel_add = ixgbe_add_vxlan_port,
.ndo_udp_tunnel_del = ixgbe_del_vxlan_port,
.ndo_udp_tunnel_add = ixgbe_add_udp_tunnel_port,
.ndo_udp_tunnel_del = ixgbe_del_udp_tunnel_port,
.ndo_features_check = ixgbe_features_check,
};

7
drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
View File

@ -487,6 +487,13 @@ struct ixgbe_thermal_sensor_data {
#define IXGBE_FHFT_EXT(_n) (0x09800 + ((_n) * 0x100)) /* Ext Flexible Host
* Filter Table */
/* masks for accessing VXLAN and GENEVE UDP ports */
#define IXGBE_VXLANCTRL_VXLAN_UDPPORT_MASK 0x0000ffff /* VXLAN port */
#define IXGBE_VXLANCTRL_GENEVE_UDPPORT_MASK 0xffff0000 /* GENEVE port */
#define IXGBE_VXLANCTRL_ALL_UDPPORT_MASK 0xffffffff /* GENEVE/VXLAN */
#define IXGBE_VXLANCTRL_GENEVE_UDPPORT_SHIFT 16
#define IXGBE_FLEXIBLE_FILTER_COUNT_MAX 4
#define IXGBE_EXT_FLEXIBLE_FILTER_COUNT_MAX 2