[dpdk-dev] [PATCH 1/6]i40e:vxlan packet identification

[Jijiang Liu <jijiang.liu@intel.com>]

VxLAN UDP port configuration on i40e, it includes
 -  VxLAN UDP port initialization
 -  Add VxLAN UDP port API 

Signed-off-by: jijiangl <jijiang.liu@intel.com>
Acked-by: Helin Zhang <helin.zhang@intel.com>
Acked-by: Jingjing Wu <jingjing.wu@intel.com>
Acked-by: Jing Chen <jing.d.chen@intel.com>
---
 lib/librte_ether/rte_ethdev.c     |   63 ++++++++++++
 lib/librte_ether/rte_ethdev.h     |   76 ++++++++++++++
 lib/librte_ether/rte_ether.h      |   10 ++
 lib/librte_pmd_i40e/i40e_ethdev.c |  199 ++++++++++++++++++++++++++++++++++++-
 lib/librte_pmd_i40e/i40e_ethdev.h |    5 +
 5 files changed, 352 insertions(+), 1 deletions(-)

diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index fd1010a..325edb1 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -1892,6 +1892,69 @@ rte_eth_dev_rss_hash_conf_get(uint8_t port_id,
 }
 
 int
+rte_eth_dev_udp_tunnel_add(uint8_t port_id,
+			   struct rte_eth_udp_tunnel *udp_tunnel,
+			   uint8_t count)
+{
+	uint8_t i;
+	struct rte_eth_dev *dev;
+	struct rte_eth_udp_tunnel *tunnel;
+
+	if (port_id >= nb_ports) {
+		PMD_DEBUG_TRACE("Invalid port_id=%d\n", port_id);
+		return -ENODEV;
+	}
+
+	if (udp_tunnel == NULL) {
+		PMD_DEBUG_TRACE("Invalid udp_tunnel parameter\n");
+		return -EINVAL;
+	}
+	tunnel = udp_tunnel;
+
+	for (i = 0; i < count; i++, tunnel++) {
+		if (tunnel->prot_type >= RTE_TUNNEL_TYPE_MAX) {
+			PMD_DEBUG_TRACE("Invalid tunnel type\n");
+			return -EINVAL;
+		}
+	}
+
+	dev = &rte_eth_devices[port_id];
+	FUNC_PTR_OR_ERR_RET(*dev->dev_ops->udp_tunnel_add, -ENOTSUP);
+	return (*dev->dev_ops->udp_tunnel_add)(dev, udp_tunnel, count);
+}
+
+int
+rte_eth_dev_udp_tunnel_delete(uint8_t port_id,
+			      struct rte_eth_udp_tunnel *udp_tunnel,
+			      uint8_t count)
+{
+	uint8_t i;
+	struct rte_eth_dev *dev;
+	struct rte_eth_udp_tunnel *tunnel;
+
+	if (port_id >= nb_ports) {
+		PMD_DEBUG_TRACE("Invalid port_id=%d\n", port_id);
+		return -ENODEV;
+	}
+	dev = &rte_eth_devices[port_id];
+
+	if (udp_tunnel == NULL) {
+		PMD_DEBUG_TRACE("Invalid udp_tunnel parametr\n");
+		return -EINVAL;
+	}
+	tunnel = udp_tunnel;
+	for (i = 0; i < count; i++, tunnel++) {
+		if (tunnel->prot_type >= RTE_TUNNEL_TYPE_MAX) {
+			PMD_DEBUG_TRACE("Invalid tunnel type\n");
+			return -EINVAL;
+		}
+	}
+
+	FUNC_PTR_OR_ERR_RET(*dev->dev_ops->udp_tunnel_del, -ENOTSUP);
+	return (*dev->dev_ops->udp_tunnel_del)(dev, udp_tunnel, count);
+}
+
+int
 rte_eth_led_on(uint8_t port_id)
 {
 	struct rte_eth_dev *dev;
diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index 50df654..d24907f 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -708,6 +708,26 @@ struct rte_fdir_conf {
 };
 
 /**
+ * Tunneled type.
+ */
+enum rte_eth_tunnel_type {
+	RTE_TUNNEL_TYPE_NONE = 0,
+	RTE_TUNNEL_TYPE_VXLAN,
+	RTE_TUNNEL_TYPE_GENEVE,
+	RTE_TUNNEL_TYPE_TEREDO,
+	RTE_TUNNEL_TYPE_NVGRE,
+	RTE_TUNNEL_TYPE_MAX,
+};
+
+/**
+ * UDP tunneling configuration.
+ */
+struct rte_eth_udp_tunnel {
+	uint16_t udp_port;
+	uint8_t prot_type;
+};
+
+/**
  *  Possible l4type of FDIR filters.
  */
 enum rte_l4type {
@@ -829,6 +849,7 @@ struct rte_intr_conf {
  * configuration settings may be needed.
  */
 struct rte_eth_conf {
+	enum rte_eth_tunnel_type tunnel_type;
 	uint16_t link_speed;
 	/**< ETH_LINK_SPEED_10[0|00|000], or 0 for autonegotation */
 	uint16_t link_duplex;
@@ -1240,6 +1261,17 @@ typedef int (*eth_mirror_rule_reset_t)(struct rte_eth_dev *dev,
 				  uint8_t rule_id);
 /**< @internal Remove a traffic mirroring rule on an Ethernet device */
 
+typedef int (*eth_udp_tunnel_add_t)(struct rte_eth_dev *dev,
+				    struct rte_eth_udp_tunnel *tunnel_udp,
+				    uint8_t count);
+/**< @internal Add tunneling UDP info */
+
+typedef int (*eth_udp_tunnel_del_t)(struct rte_eth_dev *dev,
+				    struct rte_eth_udp_tunnel *tunnel_udp,
+				    uint8_t count);
+/**< @internal Delete tunneling UDP info */
+
+
 #ifdef RTE_NIC_BYPASS
 
 enum {
@@ -1412,6 +1444,8 @@ struct eth_dev_ops {
 	eth_set_vf_rx_t            set_vf_rx;  /**< enable/disable a VF receive */
 	eth_set_vf_tx_t            set_vf_tx;  /**< enable/disable a VF transmit */
 	eth_set_vf_vlan_filter_t   set_vf_vlan_filter;  /**< Set VF VLAN filter */
+	eth_udp_tunnel_add_t       udp_tunnel_add;
+	eth_udp_tunnel_del_t       udp_tunnel_del;
 	eth_set_queue_rate_limit_t set_queue_rate_limit;   /**< Set queue rate limit */
 	eth_set_vf_rate_limit_t    set_vf_rate_limit;   /**< Set VF rate limit */
 
@@ -3268,6 +3302,48 @@ int
 rte_eth_dev_rss_hash_conf_get(uint8_t port_id,
 			      struct rte_eth_rss_conf *rss_conf);
 
+ /**
+ * Add tunneling UDP port configuration of Ethernet device
+ *
+ * @param port_id
+ *   The port identifier of the Ethernet device.
+ * @param tunnel_udp
+ *   Where to store the current Tunneling UDP configuration
+ *   of the Ethernet device.
+ * @param count
+ *   How many configurations are going to added.
+ *
+ * @return
+ *   - (0) if successful.
+ *   - (-ENODEV) if port identifier is invalid.
+ *   - (-ENOTSUP) if hardware doesn't support tunnel type.
+ */
+int
+rte_eth_dev_udp_tunnel_add(uint8_t port_id,
+			struct rte_eth_udp_tunnel *tunnel_udp,
+			uint8_t count);
+
+ /**
+ * Detete tunneling UDP port configuration of Ethernet device
+ *
+ * @param port_id
+ *   The port identifier of the Ethernet device.
+ * @param tunnel_udp
+ *   Where to store the current Tunneling UDP configuration
+ *   of the Ethernet device.
+ * @param count
+ *   How many configurations are going to deleted.
+ *
+ * @return
+ *   - (0) if successful.
+ *   - (-ENODEV) if port identifier is invalid.
+ *   - (-ENOTSUP) if hardware doesn't support tunnel type.
+ */
+int
+rte_eth_dev_udp_tunnel_delete(uint8_t port_id,
+			struct rte_eth_udp_tunnel *tunnel_udp,
+			uint8_t count);
+
 /**
  * add syn filter
  *
diff --git a/lib/librte_ether/rte_ether.h b/lib/librte_ether/rte_ether.h
index 2e08f23..604712a 100644
--- a/lib/librte_ether/rte_ether.h
+++ b/lib/librte_ether/rte_ether.h
@@ -69,6 +69,8 @@ extern "C" {
 
 #define ETHER_MIN_MTU 68 /**< Minimum MTU for IPv4 packets, see RFC 791. */
 
+#define ETHER_VXLAN_UDP_PORT  4789 /** < default port assigned to VxLAN */
+
 /**
  * Ethernet address:
  * A universally administered address is uniquely assigned to a device by its
@@ -286,6 +288,12 @@ struct vlan_hdr {
 	uint16_t eth_proto;/**< Ethernet type of encapsulated frame. */
 } __attribute__((__packed__));
 
+/* VXLAN protocol header */
+struct vxlan_hdr {
+	uint32_t vx_flags; /**< VxLAN flag. */
+	uint32_t vx_vni;   /**< VxLAN ID. */
+} __attribute__((__packed__));
+
 /* Ethernet frame types */
 #define ETHER_TYPE_IPv4 0x0800 /**< IPv4 Protocol. */
 #define ETHER_TYPE_IPv6 0x86DD /**< IPv6 Protocol. */
@@ -294,6 +302,8 @@ struct vlan_hdr {
 #define ETHER_TYPE_VLAN 0x8100 /**< IEEE 802.1Q VLAN tagging. */
 #define ETHER_TYPE_1588 0x88F7 /**< IEEE 802.1AS 1588 Precise Time Protocol. */
 
+#define ETHER_VXLAN_HLEN (sizeof(struct udp_hdr) + sizeof(struct vxlan_hdr))
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/librte_pmd_i40e/i40e_ethdev.c b/lib/librte_pmd_i40e/i40e_ethdev.c
index 9ed31b5..bb3d39a 100644
--- a/lib/librte_pmd_i40e/i40e_ethdev.c
+++ b/lib/librte_pmd_i40e/i40e_ethdev.c
@@ -187,7 +187,7 @@ static int i40e_res_pool_alloc(struct i40e_res_pool_info *pool,
 static int i40e_dev_init_vlan(struct rte_eth_dev *dev);
 static int i40e_veb_release(struct i40e_veb *veb);
 static struct i40e_veb *i40e_veb_setup(struct i40e_pf *pf,
-						struct i40e_vsi *vsi);
+					struct i40e_vsi *vsi);
 static int i40e_pf_config_mq_rx(struct i40e_pf *pf);
 static int i40e_vsi_config_double_vlan(struct i40e_vsi *vsi, int on);
 static inline int i40e_find_all_vlan_for_mac(struct i40e_vsi *vsi,
@@ -203,6 +203,13 @@ static int i40e_dev_rss_hash_update(struct rte_eth_dev *dev,
 				    struct rte_eth_rss_conf *rss_conf);
 static int i40e_dev_rss_hash_conf_get(struct rte_eth_dev *dev,
 				      struct rte_eth_rss_conf *rss_conf);
+static int i40e_dev_udp_tunnel_add(struct rte_eth_dev *dev,
+				   struct rte_eth_udp_tunnel *udp_tunnel,
+				   uint8_t count);
+static int i40e_dev_udp_tunnel_del(struct rte_eth_dev *dev,
+				   struct rte_eth_udp_tunnel *udp_tunnel,
+				   uint8_t count);
+static int i40e_pf_config_vxlan(struct i40e_pf *pf);
 
 /* Default hash key buffer for RSS */
 static uint32_t rss_key_default[I40E_PFQF_HKEY_MAX_INDEX + 1];
@@ -248,6 +255,8 @@ static struct eth_dev_ops i40e_eth_dev_ops = {
 	.reta_query                   = i40e_dev_rss_reta_query,
 	.rss_hash_update              = i40e_dev_rss_hash_update,
 	.rss_hash_conf_get            = i40e_dev_rss_hash_conf_get,
+	.udp_tunnel_add               = i40e_dev_udp_tunnel_add,
+	.udp_tunnel_del               = i40e_dev_udp_tunnel_del,
 };
 
 static struct eth_driver rte_i40e_pmd = {
@@ -2365,6 +2374,34 @@ i40e_vsi_dump_bw_config(struct i40e_vsi *vsi)
 	return 0;
 }
 
+static int
+i40e_vxlan_filters_init(struct i40e_pf *pf)
+{
+	uint8_t filter_index;
+	int ret = 0;
+	struct i40e_hw *hw = I40E_PF_TO_HW(pf);
+
+	if (!(pf->flags & I40E_FLAG_VXLAN))
+		return 0;
+
+	/* Init first entry in tunneling UDP table */
+	ret = i40e_aq_add_udp_tunnel(hw, ETHER_VXLAN_UDP_PORT,
+				I40E_AQC_TUNNEL_TYPE_VXLAN,
+				&filter_index, NULL);
+	if (ret < 0) {
+		PMD_DRV_LOG(ERR, "Failed to add UDP tunnel port %d "
+			"with index=%d\n", RTE_VXLAN_UDP_PORT,
+			 filter_index);
+	} else {
+		pf->vxlan_bitmap |= 1;
+		pf->vxlan_ports[0] = ETHER_VXLAN_UDP_PORT;
+		PMD_DRV_LOG(INFO, "Added UDP tunnel port %d with "
+			"index=%d\n", RTE_VXLAN_UDP_PORT, filter_index);
+	}
+
+	return ret;
+}
+
 /* Setup a VSI */
 struct i40e_vsi *
 i40e_vsi_setup(struct i40e_pf *pf,
@@ -2988,6 +3025,12 @@ i40e_vsi_rx_init(struct i40e_vsi *vsi)
 	uint16_t i;
 
 	i40e_pf_config_mq_rx(pf);
+
+	if (data->dev_conf.tunnel_type == RTE_TUNNEL_TYPE_VXLAN) {
+		pf->flags |= I40E_FLAG_VXLAN;
+		i40e_pf_config_vxlan(pf);
+	}
+
 	for (i = 0; i < data->nb_rx_queues; i++) {
 		ret = i40e_rx_queue_init(data->rx_queues[i]);
 		if (ret != I40E_SUCCESS) {
@@ -3904,6 +3947,150 @@ i40e_dev_rss_hash_conf_get(struct rte_eth_dev *dev,
 	return 0;
 }
 
+static int
+i40e_get_vxlan_port_idx(struct i40e_pf *pf, uint16_t port)
+{
+	uint8_t i;
+
+	for (i = 0; i < I40E_MAX_PF_UDP_OFFLOAD_PORTS; i++) {
+		if (pf->vxlan_ports[i] == port)
+			return i;
+	}
+
+	return -1;
+}
+
+static int
+i40e_add_vxlan_port(struct i40e_pf *pf, uint16_t port)
+{
+	int  idx, ret;
+	uint8_t filter_idx;
+	struct i40e_hw *hw = I40E_PF_TO_HW(pf);
+
+	if (!(pf->flags & I40E_FLAG_VXLAN)) {
+		PMD_DRV_LOG(ERR, "VxLAN tunneling mode is not configured\n");
+		return -EINVAL;
+	}
+
+	idx = i40e_get_vxlan_port_idx(pf, port);
+
+	/* Check if port already exists */
+	if (idx >= 0) {
+		PMD_DRV_LOG(ERR, "Port %d already offloaded\n", port);
+		return -1;
+	}
+
+	/* Now check if there is space to add the new port */
+	idx = i40e_get_vxlan_port_idx(pf, 0);
+	if (idx < 0) {
+		PMD_DRV_LOG(ERR, "Maximum number of UDP ports reached,"
+			"not adding port %d\n", port);
+		return -ENOSPC;
+	}
+
+	ret =  i40e_aq_add_udp_tunnel(hw, port, I40E_AQC_TUNNEL_TYPE_VXLAN,
+					&filter_idx, NULL);
+	if (ret < 0) {
+		PMD_DRV_LOG(ERR, "Failed to add VxLAN UDP port %d\n", port);
+		return -1;
+	}
+
+	PMD_DRV_LOG(INFO, "Added %s port %d with AQ command with index %d\n",
+			 port,  filter_index);
+
+	/* New port: add it and mark its index in the bitmap */
+	pf->vxlan_ports[idx] = port;
+	pf->vxlan_bitmap |= (1 << idx);
+
+	return 0;
+}
+
+static int
+i40e_del_vxlan_port(struct i40e_pf *pf, uint16_t port)
+{
+	int idx;
+	struct i40e_hw *hw = I40E_PF_TO_HW(pf);
+
+	idx = i40e_get_vxlan_port_idx(pf, port);
+
+	if (idx < 0) {
+		PMD_DRV_LOG(ERR, "Port %d doesn't exist\n", port);
+		return -1;
+	}
+
+	if (i40e_aq_del_udp_tunnel(hw, idx, NULL) < 0) {
+		PMD_DRV_LOG(ERR, "Failed to delete VxLAN UDP port %d\n", port);
+		return -1;
+	}
+
+	PMD_DRV_LOG(INFO, "Added port %d with AQ command with index %d\n",
+			port, idx);
+
+	pf->vxlan_ports[idx] = 0;
+	pf->vxlan_bitmap &= ~(1 << idx);
+
+	return 0;
+}
+
+/* configure port of UDP tunneling */
+static int
+i40e_dev_udp_tunnel_add(struct rte_eth_dev *dev,
+		struct rte_eth_udp_tunnel *udp_tunnel, uint8_t count)
+{
+	uint16_t i;
+	int ret = 0;
+	struct i40e_pf *pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private);
+
+	for (i = 0; i < count; i++, udp_tunnel++) {
+		switch (udp_tunnel->prot_type) {
+		case RTE_TUNNEL_TYPE_VXLAN:
+			ret = i40e_add_vxlan_port(pf, udp_tunnel->udp_port);
+			break;
+
+		case RTE_TUNNEL_TYPE_GENEVE:
+		case RTE_TUNNEL_TYPE_TEREDO:
+			PMD_DRV_LOG(ERR, "Tunnel type is not supported now.\n");
+			ret = -1;
+			break;
+
+		default:
+			PMD_DRV_LOG(ERR, "Invalid tunnel type\n");
+			ret = -1;
+			break;
+		}
+	}
+
+	return ret;
+}
+
+static int
+i40e_dev_udp_tunnel_del(struct rte_eth_dev *dev,
+			struct rte_eth_udp_tunnel *udp_tunnel, uint8_t count)
+{
+	uint16_t i;
+	int ret = 0;
+	struct i40e_pf *pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private);
+
+	for (i = 0; i < count; i++, udp_tunnel++) {
+		switch (udp_tunnel->prot_type) {
+		case RTE_TUNNEL_TYPE_VXLAN:
+			ret = i40e_del_vxlan_port(pf, udp_tunnel->udp_port);
+			break;
+		case RTE_TUNNEL_TYPE_GENEVE:
+		case RTE_TUNNEL_TYPE_TEREDO:
+			PMD_DRV_LOG(ERR, "Tunnel type is not supported now.\n");
+			ret = -1;
+			break;
+		default:
+			PMD_DRV_LOG(ERR, "Invalid tunnel type\n");
+			ret = -1;
+			break;
+		}
+	}
+
+	return ret;
+}
+
 /* Configure RSS */
 static int
 i40e_pf_config_rss(struct i40e_pf *pf)
@@ -3940,6 +4127,16 @@ i40e_pf_config_rss(struct i40e_pf *pf)
 	return i40e_hw_rss_hash_set(hw, &rss_conf);
 }
 
+/* Configure VxLAN */
+static int
+i40e_pf_config_vxlan(struct i40e_pf *pf)
+{
+	if (pf->flags & I40E_FLAG_VXLAN)
+		i40e_vxlan_filters_init(pf);
+
+	return 0;
+}
+
 static int
 i40e_pf_config_mq_rx(struct i40e_pf *pf)
 {
diff --git a/lib/librte_pmd_i40e/i40e_ethdev.h b/lib/librte_pmd_i40e/i40e_ethdev.h
index 64deef2..22d0628 100644
--- a/lib/librte_pmd_i40e/i40e_ethdev.h
+++ b/lib/librte_pmd_i40e/i40e_ethdev.h
@@ -60,6 +60,7 @@
 #define I40E_FLAG_HEADER_SPLIT_DISABLED (1ULL << 4)
 #define I40E_FLAG_HEADER_SPLIT_ENABLED  (1ULL << 5)
 #define I40E_FLAG_FDIR                  (1ULL << 6)
+#define I40E_FLAG_VXLAN                 (1ULL << 7)
 #define I40E_FLAG_ALL (I40E_FLAG_RSS | \
 		       I40E_FLAG_DCB | \
 		       I40E_FLAG_VMDQ | \
@@ -216,6 +217,10 @@ struct i40e_pf {
 	uint16_t vmdq_nb_qps; /* The number of queue pairs of VMDq */
 	uint16_t vf_nb_qps; /* The number of queue pairs of VF */
 	uint16_t fdir_nb_qps; /* The number of queue pairs of Flow Director */
+
+	/* store VxLAN UDP ports */
+	uint16_t vxlan_ports[I40E_MAX_PF_UDP_OFFLOAD_PORTS];
+	uint16_t vxlan_bitmap; /* Vxlan bit mask */
 };
 
 enum pending_msg {
-- 
1.7.7.6