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Date: Tue, 1 Sep 2015 20:31:13 -0700
From: Tom Herbert <tom@...bertland.com>
To: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Cc: "David S. Miller" <davem@...emloft.net>,
Mark Rustad <mark.d.rustad@...el.com>,
Linux Kernel Network Developers <netdev@...r.kernel.org>,
nhorman@...hat.com, sassmann@...hat.com, jogreene@...hat.com
Subject: Re: [net-next 06/19] ixgbe: Add support for VXLAN RX offloads
On Tue, Sep 1, 2015 at 6:13 PM, Jeff Kirsher
<jeffrey.t.kirsher@...el.com> wrote:
> From: Mark Rustad <mark.d.rustad@...el.com>
>
> Add support for VXLAN RX offloads for the X55x devices that support
> them.
>
> Signed-off-by: Mark Rustad <mark.d.rustad@...el.com>
> Tested-by: Phil Schmitt <phillip.j.schmitt@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
> ---
> drivers/net/ethernet/intel/ixgbe/ixgbe.h | 6 ++
> drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c | 18 +++-
> drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 119 ++++++++++++++++++++-----
> drivers/net/ethernet/intel/ixgbe/ixgbe_type.h | 15 ++--
> 4 files changed, 127 insertions(+), 31 deletions(-)
>
> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
> index ac3ac2a..8830c0f 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
> @@ -630,6 +630,7 @@ struct ixgbe_adapter {
> #define IXGBE_FLAG_FCOE_ENABLED (u32)(1 << 21)
> #define IXGBE_FLAG_SRIOV_CAPABLE (u32)(1 << 22)
> #define IXGBE_FLAG_SRIOV_ENABLED (u32)(1 << 23)
> +#define IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE BIT(24)
>
> u32 flags2;
> #define IXGBE_FLAG2_RSC_CAPABLE (u32)(1 << 0)
> @@ -644,6 +645,9 @@ struct ixgbe_adapter {
> #define IXGBE_FLAG2_RSS_FIELD_IPV6_UDP (u32)(1 << 9)
> #define IXGBE_FLAG2_PTP_PPS_ENABLED (u32)(1 << 10)
> #define IXGBE_FLAG2_PHY_INTERRUPT (u32)(1 << 11)
> +#ifdef CONFIG_IXGBE_VXLAN
> +#define IXGBE_FLAG2_VXLAN_REREG_NEEDED BIT(12)
> +#endif
>
> /* Tx fast path data */
> int num_tx_queues;
> @@ -757,7 +761,9 @@ struct ixgbe_adapter {
> u32 timer_event_accumulator;
> u32 vferr_refcount;
> struct ixgbe_mac_addr *mac_table;
> +#ifdef CONFIG_IXGBE_VXLAN
> u16 vxlan_port;
> +#endif
> struct kobject *info_kobj;
> #ifdef CONFIG_IXGBE_HWMON
> struct hwmon_buff *ixgbe_hwmon_buff;
> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
> index d910442..dd7062f 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
> @@ -1519,20 +1519,28 @@ static u32 ixgbe_atr_compute_sig_hash_82599(union ixgbe_atr_hash_dword input,
> * @input: unique input dword
> * @common: compressed common input dword
> * @queue: queue index to direct traffic to
> + *
> + * Note that the tunnel bit in input must not be set when the hardware
> + * tunneling support does not exist.
> **/
> s32 ixgbe_fdir_add_signature_filter_82599(struct ixgbe_hw *hw,
> union ixgbe_atr_hash_dword input,
> union ixgbe_atr_hash_dword common,
> u8 queue)
> {
> - u64 fdirhashcmd;
> - u32 fdircmd;
> + u64 fdirhashcmd;
> + u8 flow_type;
> + bool tunnel;
> + u32 fdircmd;
>
> /*
> * Get the flow_type in order to program FDIRCMD properly
> * lowest 2 bits are FDIRCMD.L4TYPE, third lowest bit is FDIRCMD.IPV6
> */
> - switch (input.formatted.flow_type) {
> + tunnel = !!(input.formatted.flow_type & IXGBE_ATR_L4TYPE_TUNNEL_MASK);
> + flow_type = input.formatted.flow_type &
> + (IXGBE_ATR_L4TYPE_TUNNEL_MASK - 1);
> + switch (flow_type) {
> case IXGBE_ATR_FLOW_TYPE_TCPV4:
> case IXGBE_ATR_FLOW_TYPE_UDPV4:
> case IXGBE_ATR_FLOW_TYPE_SCTPV4:
> @@ -1548,8 +1556,10 @@ s32 ixgbe_fdir_add_signature_filter_82599(struct ixgbe_hw *hw,
> /* configure FDIRCMD register */
> fdircmd = IXGBE_FDIRCMD_CMD_ADD_FLOW | IXGBE_FDIRCMD_FILTER_UPDATE |
> IXGBE_FDIRCMD_LAST | IXGBE_FDIRCMD_QUEUE_EN;
> - fdircmd |= input.formatted.flow_type << IXGBE_FDIRCMD_FLOW_TYPE_SHIFT;
> + fdircmd |= (u32)flow_type << IXGBE_FDIRCMD_FLOW_TYPE_SHIFT;
> fdircmd |= (u32)queue << IXGBE_FDIRCMD_RX_QUEUE_SHIFT;
> + if (tunnel)
> + fdircmd |= IXGBE_FDIRCMD_TUNNEL_FILTER;
>
> /*
> * The lower 32-bits of fdirhashcmd is for FDIRHASH, the upper 32-bits
> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> index 900562e..dcf849d 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> @@ -1,7 +1,7 @@
> /*******************************************************************************
>
> Intel 10 Gigabit PCI Express Linux driver
> - Copyright(c) 1999 - 2014 Intel Corporation.
> + Copyright(c) 1999 - 2015 Intel Corporation.
>
> This program is free software; you can redistribute it and/or modify it
> under the terms and conditions of the GNU General Public License,
> @@ -65,6 +65,9 @@
> #include "ixgbe_common.h"
> #include "ixgbe_dcb_82599.h"
> #include "ixgbe_sriov.h"
> +#ifdef CONFIG_IXGBE_VXLAN
> +#include <net/vxlan.h>
> +#endif
>
> char ixgbe_driver_name[] = "ixgbe";
> static const char ixgbe_driver_string[] =
> @@ -79,7 +82,7 @@ static char ixgbe_default_device_descr[] =
> #define DRV_VERSION "4.0.1-k"
> const char ixgbe_driver_version[] = DRV_VERSION;
> static const char ixgbe_copyright[] =
> - "Copyright (c) 1999-2014 Intel Corporation.";
> + "Copyright (c) 1999-2015 Intel Corporation.";
>
> static const char ixgbe_overheat_msg[] = "Network adapter has been stopped because it has over heated. Restart the computer. If the problem persists, power off the system and replace the adapter";
>
> @@ -1430,7 +1433,6 @@ static inline void ixgbe_rx_checksum(struct ixgbe_ring *ring,
> (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 */
> @@ -4261,6 +4263,21 @@ static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
> }
> }
>
> +static void ixgbe_clear_vxlan_port(struct ixgbe_adapter *adapter)
> +{
> + switch (adapter->hw.mac.type) {
> + case ixgbe_mac_X550:
> + case ixgbe_mac_X550EM_x:
> + IXGBE_WRITE_REG(&adapter->hw, IXGBE_VXLANCTRL, 0);
> +#ifdef CONFIG_IXGBE_VXLAN
> + adapter->vxlan_port = 0;
> +#endif
> + break;
> + default:
> + break;
> + }
> +}
> +
> #ifdef CONFIG_IXGBE_DCB
> /**
> * ixgbe_configure_dcb - Configure DCB hardware
> @@ -5302,6 +5319,9 @@ static int ixgbe_sw_init(struct ixgbe_adapter *adapter)
> #ifdef CONFIG_IXGBE_DCA
> adapter->flags &= ~IXGBE_FLAG_DCA_CAPABLE;
> #endif
> +#ifdef CONFIG_IXGBE_VXLAN
> + adapter->flags |= IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE;
> +#endif
> break;
> default:
> break;
> @@ -5753,10 +5773,11 @@ static int ixgbe_open(struct net_device *netdev)
>
> ixgbe_up_complete(adapter);
>
> -#if IS_ENABLED(CONFIG_IXGBE_VXLAN)
> + ixgbe_clear_vxlan_port(adapter);
> +#ifdef CONFIG_IXGBE_VXLAN
> vxlan_get_rx_port(netdev);
> -
> #endif
> +
> return 0;
>
> err_set_queues:
> @@ -6816,6 +6837,12 @@ static void ixgbe_service_task(struct work_struct *work)
> ixgbe_service_event_complete(adapter);
> return;
> }
> +#ifdef CONFIG_IXGBE_VXLAN
> + if (adapter->flags2 & IXGBE_FLAG2_VXLAN_REREG_NEEDED) {
> + adapter->flags2 &= ~IXGBE_FLAG2_VXLAN_REREG_NEEDED;
> + vxlan_get_rx_port(adapter->netdev);
> + }
> +#endif /* CONFIG_IXGBE_VXLAN */
> ixgbe_reset_subtask(adapter);
> ixgbe_phy_interrupt_subtask(adapter);
> ixgbe_sfp_detection_subtask(adapter);
> @@ -7240,6 +7267,10 @@ static void ixgbe_atr(struct ixgbe_ring *ring,
> struct ipv6hdr *ipv6;
> } hdr;
> struct tcphdr *th;
> + struct sk_buff *skb;
> +#ifdef CONFIG_IXGBE_VXLAN
> + u8 encap = false;
> +#endif /* CONFIG_IXGBE_VXLAN */
> __be16 vlan_id;
>
> /* if ring doesn't have a interrupt vector, cannot perform ATR */
> @@ -7253,16 +7284,36 @@ static void ixgbe_atr(struct ixgbe_ring *ring,
Isn't this a function in the transmit path? What do these changes have
to do with RX offloads?
> ring->atr_count++;
>
> /* snag network header to get L4 type and address */
> - hdr.network = skb_network_header(first->skb);
> + skb = first->skb;
> + hdr.network = skb_network_header(skb);
> + if (skb->encapsulation) {
> +#ifdef CONFIG_IXGBE_VXLAN
> + struct ixgbe_adapter *adapter = q_vector->adapter;
>
> - /* Currently only IPv4/IPv6 with TCP is supported */
> - if ((first->protocol != htons(ETH_P_IPV6) ||
> - hdr.ipv6->nexthdr != IPPROTO_TCP) &&
> - (first->protocol != htons(ETH_P_IP) ||
> - hdr.ipv4->protocol != IPPROTO_TCP))
> + if (!adapter->vxlan_port)
> + return;
> + if (first->protocol != htons(ETH_P_IP) ||
> + hdr.ipv4->version != IPVERSION ||
> + hdr.ipv4->protocol != IPPROTO_UDP) {
> + return;
> + }
> + if (ntohs(udp_hdr(skb)->dest) != adapter->vxlan_port)
> + return;
> + encap = true;
> + hdr.network = skb_inner_network_header(skb);
> + th = inner_tcp_hdr(skb);
> +#else
> return;
> -
> - th = tcp_hdr(first->skb);
> +#endif /* CONFIG_IXGBE_VXLAN */
> + } else {
> + /* Currently only IPv4/IPv6 with TCP is supported */
> + if ((first->protocol != htons(ETH_P_IPV6) ||
> + hdr.ipv6->nexthdr != IPPROTO_TCP) &&
> + (first->protocol != htons(ETH_P_IP) ||
> + hdr.ipv4->protocol != IPPROTO_TCP))
> + return;
> + th = tcp_hdr(skb);
> + }
>
> /* skip this packet since it is invalid or the socket is closing */
> if (!th || th->fin)
> @@ -7311,6 +7362,11 @@ static void ixgbe_atr(struct ixgbe_ring *ring,
> hdr.ipv6->daddr.s6_addr32[3];
> }
>
> +#ifdef CONFIG_IXGBE_VXLAN
> + if (encap)
> + input.formatted.flow_type |= IXGBE_ATR_L4TYPE_TUNNEL_MASK;
> +#endif /* CONFIG_IXGBE_VXLAN */
> +
> /* This assumes the Rx queue and Tx queue are bound to the same CPU */
> ixgbe_fdir_add_signature_filter_82599(&q_vector->adapter->hw,
> input, common, ring->queue_index);
> @@ -7937,12 +7993,23 @@ static int ixgbe_set_features(struct net_device *netdev,
> need_reset = true;
>
> netdev->features = features;
> +
> +#ifdef CONFIG_IXGBE_VXLAN
> + 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);
> + }
> +#endif /* CONFIG_IXGBE_VXLAN */
> +
> if (need_reset)
> ixgbe_do_reset(netdev);
>
> return 0;
> }
>
> +#ifdef CONFIG_IXGBE_VXLAN
> /**
> * ixgbe_add_vxlan_port - Get notifications about VXLAN ports that come up
> * @dev: The port's netdev
> @@ -7956,17 +8023,18 @@ static void ixgbe_add_vxlan_port(struct net_device *dev, sa_family_t sa_family,
> struct ixgbe_hw *hw = &adapter->hw;
> u16 new_port = ntohs(port);
>
> + if (!(adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE))
> + return;
> +
> if (sa_family == AF_INET6)
> return;
>
> - if (adapter->vxlan_port == new_port) {
> - netdev_info(dev, "Port %d already offloaded\n", new_port);
> + if (adapter->vxlan_port == new_port)
> return;
> - }
>
> if (adapter->vxlan_port) {
> netdev_info(dev,
> - "Hit Max num of UDP ports, not adding port %d\n",
> + "Hit Max num of VXLAN ports, not adding port %d\n",
> new_port);
> return;
> }
> @@ -7985,9 +8053,11 @@ 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 (!(adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE))
> + return;
> +
> if (sa_family == AF_INET6)
> return;
>
> @@ -7997,9 +8067,10 @@ static void ixgbe_del_vxlan_port(struct net_device *dev, sa_family_t sa_family,
> return;
> }
>
> - adapter->vxlan_port = 0;
> - IXGBE_WRITE_REG(hw, IXGBE_VXLANCTRL, 0);
> + ixgbe_clear_vxlan_port(adapter);
> + adapter->flags2 |= IXGBE_FLAG2_VXLAN_REREG_NEEDED;
> }
> +#endif /* CONFIG_IXGBE_VXLAN */
>
> static int ixgbe_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
> struct net_device *dev,
> @@ -8290,8 +8361,10 @@ 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,
> +#ifdef CONFIG_IXGBE_VXLAN
> .ndo_add_vxlan_port = ixgbe_add_vxlan_port,
> .ndo_del_vxlan_port = ixgbe_del_vxlan_port,
> +#endif /* CONFIG_IXGBE_VXLAN */
> .ndo_features_check = ixgbe_features_check,
> };
>
> @@ -8658,14 +8731,18 @@ skip_sriov:
> netdev->priv_flags |= IFF_UNICAST_FLT;
> netdev->priv_flags |= IFF_SUPP_NOFCS;
>
> +#ifdef CONFIG_IXGBE_VXLAN
> switch (adapter->hw.mac.type) {
> case ixgbe_mac_X550:
> case ixgbe_mac_X550EM_x:
> - netdev->hw_enc_features |= NETIF_F_RXCSUM;
> + netdev->hw_enc_features |= NETIF_F_RXCSUM |
> + NETIF_F_IP_CSUM |
> + NETIF_F_IPV6_CSUM;
> break;
> default:
> break;
> }
> +#endif /* CONFIG_IXGBE_VXLAN */
>
> #ifdef CONFIG_IXGBE_DCB
> netdev->dcbnl_ops = &dcbnl_ops;
> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
> index 938a410..0e67824 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
> @@ -2540,9 +2540,11 @@ enum ixgbe_fdir_pballoc_type {
> #define IXGBE_FDIRCMD_QUEUE_EN 0x00008000
> #define IXGBE_FDIRCMD_FLOW_TYPE_SHIFT 5
> #define IXGBE_FDIRCMD_RX_QUEUE_SHIFT 16
> +#define IXGBE_FDIRCMD_RX_TUNNEL_FILTER_SHIFT 23
> #define IXGBE_FDIRCMD_VT_POOL_SHIFT 24
> #define IXGBE_FDIR_INIT_DONE_POLL 10
> #define IXGBE_FDIRCMD_CMD_POLL 10
> +#define IXGBE_FDIRCMD_TUNNEL_FILTER 0x00800000
>
> #define IXGBE_FDIR_DROP_QUEUE 127
>
> @@ -2833,12 +2835,13 @@ typedef u32 ixgbe_link_speed;
> #define IXGBE_ATR_SIGNATURE_HASH_KEY 0x174D3614
>
> /* Software ATR input stream values and masks */
> -#define IXGBE_ATR_HASH_MASK 0x7fff
> -#define IXGBE_ATR_L4TYPE_MASK 0x3
> -#define IXGBE_ATR_L4TYPE_UDP 0x1
> -#define IXGBE_ATR_L4TYPE_TCP 0x2
> -#define IXGBE_ATR_L4TYPE_SCTP 0x3
> -#define IXGBE_ATR_L4TYPE_IPV6_MASK 0x4
> +#define IXGBE_ATR_HASH_MASK 0x7fff
> +#define IXGBE_ATR_L4TYPE_MASK 0x3
> +#define IXGBE_ATR_L4TYPE_UDP 0x1
> +#define IXGBE_ATR_L4TYPE_TCP 0x2
> +#define IXGBE_ATR_L4TYPE_SCTP 0x3
> +#define IXGBE_ATR_L4TYPE_IPV6_MASK 0x4
> +#define IXGBE_ATR_L4TYPE_TUNNEL_MASK 0x10
> enum ixgbe_atr_flow_type {
> IXGBE_ATR_FLOW_TYPE_IPV4 = 0x0,
> IXGBE_ATR_FLOW_TYPE_UDPV4 = 0x1,
> --
> 2.4.3
>
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