[PATCH v2 03/18] net/ixgbe: store L2 tunnel filter

[Wei Zhao <wei.zhao1@intel.com>]

Add support for storing L2 tunnel filter in SW.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
Signed-off-by: Wei Zhao <wei.zhao1@intel.com>
---

v2:
--add a L2 tunnel initialization function in device start process
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 157 +++++++++++++++++++++++++++++++++++++++
 drivers/net/ixgbe/ixgbe_ethdev.h |  24 ++++++
 2 files changed, 181 insertions(+)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index de27a73..204e531 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -167,6 +167,7 @@ enum ixgbevf_xcast_modes {
 static int eth_ixgbe_dev_init(struct rte_eth_dev *eth_dev);
 static int eth_ixgbe_dev_uninit(struct rte_eth_dev *eth_dev);
 static int ixgbe_fdir_filter_init(struct rte_eth_dev *eth_dev);
+static int ixgbe_l2_tn_filter_init(struct rte_eth_dev *eth_dev);
 static int  ixgbe_dev_configure(struct rte_eth_dev *dev);
 static int  ixgbe_dev_start(struct rte_eth_dev *dev);
 static void ixgbe_dev_stop(struct rte_eth_dev *dev);
@@ -1281,6 +1282,8 @@ eth_ixgbe_dev_init(struct rte_eth_dev *eth_dev)
 	/* initialize flow director filter list & hash */
 	ixgbe_fdir_filter_init(eth_dev);
 
+	/* initialize l2 tunnel filter list & hash */
+	ixgbe_l2_tn_filter_init(eth_dev);
 	return 0;
 }
 
@@ -1291,7 +1294,10 @@ eth_ixgbe_dev_uninit(struct rte_eth_dev *eth_dev)
 	struct ixgbe_hw *hw;
 	struct ixgbe_hw_fdir_info *fdir_info =
 		IXGBE_DEV_PRIVATE_TO_FDIR_INFO(eth_dev->data->dev_private);
+	struct ixgbe_l2_tn_info *l2_tn_info =
+		IXGBE_DEV_PRIVATE_TO_L2_TN_INFO(eth_dev->data->dev_private);
 	struct ixgbe_fdir_filter *fdir_filter;
+	struct ixgbe_l2_tn_filter *l2_tn_filter;
 
 	PMD_INIT_FUNC_TRACE();
 
@@ -1338,6 +1344,19 @@ eth_ixgbe_dev_uninit(struct rte_eth_dev *eth_dev)
 		rte_free(fdir_filter);
 	}
 
+	/* remove all the L2 tunnel filters & hash */
+	if (l2_tn_info->hash_map)
+		rte_free(l2_tn_info->hash_map);
+	if (l2_tn_info->hash_handle)
+		rte_hash_free(l2_tn_info->hash_handle);
+
+	while ((l2_tn_filter = TAILQ_FIRST(&l2_tn_info->l2_tn_list))) {
+		TAILQ_REMOVE(&l2_tn_info->l2_tn_list,
+			     l2_tn_filter,
+			     entries);
+		rte_free(l2_tn_filter);
+	}
+
 	return 0;
 }
 
@@ -1372,6 +1391,40 @@ static int ixgbe_fdir_filter_init(struct rte_eth_dev *eth_dev)
 			     "Failed to allocate memory for fdir hash map!");
 		return -ENOMEM;
 	}
+	return 0;
+}
+
+static int ixgbe_l2_tn_filter_init(struct rte_eth_dev *eth_dev)
+{
+	struct ixgbe_l2_tn_info *l2_tn_info =
+		IXGBE_DEV_PRIVATE_TO_L2_TN_INFO(eth_dev->data->dev_private);
+	char l2_tn_hash_name[RTE_HASH_NAMESIZE];
+	struct rte_hash_parameters l2_tn_hash_params = {
+		.name = l2_tn_hash_name,
+		.entries = IXGBE_MAX_L2_TN_FILTER_NUM,
+		.key_len = sizeof(struct ixgbe_l2_tn_key),
+		.hash_func = rte_hash_crc,
+		.hash_func_init_val = 0,
+		.socket_id = rte_socket_id(),
+	};
+
+	TAILQ_INIT(&l2_tn_info->l2_tn_list);
+	snprintf(l2_tn_hash_name, RTE_HASH_NAMESIZE,
+		 "l2_tn_%s", eth_dev->data->name);
+	l2_tn_info->hash_handle = rte_hash_create(&l2_tn_hash_params);
+	if (!l2_tn_info->hash_handle) {
+		PMD_INIT_LOG(ERR, "Failed to create L2 TN hash table!");
+		return -EINVAL;
+	}
+	l2_tn_info->hash_map = rte_zmalloc("ixgbe",
+				   sizeof(struct ixgbe_l2_tn_filter *) *
+				   IXGBE_MAX_L2_TN_FILTER_NUM,
+				   0);
+	if (!l2_tn_info->hash_map) {
+		PMD_INIT_LOG(ERR,
+			"Failed to allocate memory for L2 TN hash map!");
+		return -ENOMEM;
+	}
 
 	return 0;
 }
@@ -7178,12 +7231,104 @@ ixgbe_e_tag_filter_add(struct rte_eth_dev *dev,
 	return -EINVAL;
 }
 
+static inline struct ixgbe_l2_tn_filter *
+ixgbe_l2_tn_filter_lookup(struct ixgbe_l2_tn_info *l2_tn_info,
+			  struct ixgbe_l2_tn_key *key)
+{
+	int ret = 0;
+
+	ret = rte_hash_lookup(l2_tn_info->hash_handle, (const void *)key);
+	if (ret < 0)
+		return NULL;
+
+	return l2_tn_info->hash_map[ret];
+}
+
+static inline int
+ixgbe_insert_l2_tn_filter(struct ixgbe_l2_tn_info *l2_tn_info,
+			  struct ixgbe_l2_tn_filter *l2_tn_filter)
+{
+	int ret = 0;
+
+	ret = rte_hash_add_key(l2_tn_info->hash_handle,
+			       &l2_tn_filter->key);
+
+	if (ret < 0) {
+		PMD_DRV_LOG(ERR,
+			    "Failed to insert L2 tunnel filter"
+			    " to hash table %d!",
+			    ret);
+		return ret;
+	}
+
+	l2_tn_info->hash_map[ret] = l2_tn_filter;
+
+	TAILQ_INSERT_TAIL(&l2_tn_info->l2_tn_list, l2_tn_filter, entries);
+
+	return 0;
+}
+
+static inline int
+ixgbe_remove_l2_tn_filter(struct ixgbe_l2_tn_info *l2_tn_info,
+			  struct ixgbe_l2_tn_key *key)
+{
+	int ret = 0;
+	struct ixgbe_l2_tn_filter *l2_tn_filter;
+
+	ret = rte_hash_del_key(l2_tn_info->hash_handle, key);
+
+	if (ret < 0) {
+		PMD_DRV_LOG(ERR,
+			    "No such L2 tunnel filter to delete %d!",
+			    ret);
+		return ret;
+	}
+
+	l2_tn_filter = l2_tn_info->hash_map[ret];
+	l2_tn_info->hash_map[ret] = NULL;
+
+	TAILQ_REMOVE(&l2_tn_info->l2_tn_list, l2_tn_filter, entries);
+	rte_free(l2_tn_filter);
+
+	return 0;
+}
+
 /* Add l2 tunnel filter */
 static int
 ixgbe_dev_l2_tunnel_filter_add(struct rte_eth_dev *dev,
 			       struct rte_eth_l2_tunnel_conf *l2_tunnel)
 {
 	int ret = 0;
+	struct ixgbe_l2_tn_info *l2_tn_info =
+		IXGBE_DEV_PRIVATE_TO_L2_TN_INFO(dev->data->dev_private);
+	struct ixgbe_l2_tn_key key;
+	struct ixgbe_l2_tn_filter *node;
+
+	key.l2_tn_type = l2_tunnel->l2_tunnel_type;
+	key.tn_id = l2_tunnel->tunnel_id;
+
+	node = ixgbe_l2_tn_filter_lookup(l2_tn_info, &key);
+
+	if (node) {
+		PMD_DRV_LOG(ERR, "The L2 tunnel filter already exists!");
+		return -EINVAL;
+	}
+
+	node = rte_zmalloc("ixgbe_l2_tn",
+			   sizeof(struct ixgbe_l2_tn_filter),
+			   0);
+	if (!node)
+		return -ENOMEM;
+
+	(void)rte_memcpy(&node->key,
+			 &key,
+			 sizeof(struct ixgbe_l2_tn_key));
+	node->pool = l2_tunnel->pool;
+	ret = ixgbe_insert_l2_tn_filter(l2_tn_info, node);
+	if (ret < 0) {
+		rte_free(node);
+		return ret;
+	}
 
 	switch (l2_tunnel->l2_tunnel_type) {
 	case RTE_L2_TUNNEL_TYPE_E_TAG:
@@ -7195,6 +7340,9 @@ ixgbe_dev_l2_tunnel_filter_add(struct rte_eth_dev *dev,
 		break;
 	}
 
+	if (ret < 0)
+		(void)ixgbe_remove_l2_tn_filter(l2_tn_info, &key);
+
 	return ret;
 }
 
@@ -7204,6 +7352,15 @@ ixgbe_dev_l2_tunnel_filter_del(struct rte_eth_dev *dev,
 			       struct rte_eth_l2_tunnel_conf *l2_tunnel)
 {
 	int ret = 0;
+	struct ixgbe_l2_tn_info *l2_tn_info =
+		IXGBE_DEV_PRIVATE_TO_L2_TN_INFO(dev->data->dev_private);
+	struct ixgbe_l2_tn_key key;
+
+	key.l2_tn_type = l2_tunnel->l2_tunnel_type;
+	key.tn_id = l2_tunnel->tunnel_id;
+	ret = ixgbe_remove_l2_tn_filter(l2_tn_info, &key);
+	if (ret < 0)
+		return ret;
 
 	switch (l2_tunnel->l2_tunnel_type) {
 	case RTE_L2_TUNNEL_TYPE_E_TAG:
diff --git a/drivers/net/ixgbe/ixgbe_ethdev.h b/drivers/net/ixgbe/ixgbe_ethdev.h
index 8310220..6663fc9 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.h
+++ b/drivers/net/ixgbe/ixgbe_ethdev.h
@@ -132,6 +132,7 @@
 #define IXGBE_RX_VEC_START              RTE_INTR_VEC_RXTX_OFFSET
 
 #define IXGBE_MAX_FDIR_FILTER_NUM       (1024 * 32)
+#define IXGBE_MAX_L2_TN_FILTER_NUM      128
 
 /*
  * Information about the fdir mode.
@@ -283,6 +284,25 @@ struct ixgbe_filter_info {
 	uint32_t syn_info;
 };
 
+struct ixgbe_l2_tn_key {
+	enum rte_eth_tunnel_type          l2_tn_type;
+	uint32_t                          tn_id;
+};
+
+struct ixgbe_l2_tn_filter {
+	TAILQ_ENTRY(ixgbe_l2_tn_filter)    entries;
+	struct ixgbe_l2_tn_key             key;
+	uint32_t                           pool;
+};
+
+TAILQ_HEAD(ixgbe_l2_tn_filter_list, ixgbe_l2_tn_filter);
+
+struct ixgbe_l2_tn_info {
+	struct ixgbe_l2_tn_filter_list      l2_tn_list;
+	struct ixgbe_l2_tn_filter         **hash_map;
+	struct rte_hash                    *hash_handle;
+};
+
 /*
  * Structure to store private data for each driver instance (for each port).
  */
@@ -302,6 +322,7 @@ struct ixgbe_adapter {
 	struct ixgbe_bypass_info    bps;
 #endif /* RTE_NIC_BYPASS */
 	struct ixgbe_filter_info    filter;
+	struct ixgbe_l2_tn_info     l2_tn;
 
 	bool rx_bulk_alloc_allowed;
 	bool rx_vec_allowed;
@@ -346,6 +367,9 @@ struct ixgbe_adapter {
 #define IXGBE_DEV_PRIVATE_TO_FILTER_INFO(adapter) \
 	(&((struct ixgbe_adapter *)adapter)->filter)
 
+#define IXGBE_DEV_PRIVATE_TO_L2_TN_INFO(adapter) \
+	(&((struct ixgbe_adapter *)adapter)->l2_tn)
+
 /*
  * RX/TX function prototypes
  */
-- 
2.5.5