[dpdk-dev] [PATCH v2 14/18] net/ixgbe: parse L2 tunnel filter

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

check if the rule is a L2 tunnel rule, and get the L2 tunnel info.

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

---

v2:
--add new error set function
--change return value type of parser function
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 269 +++++++++++++++++++++++++++++++++++----
 lib/librte_ether/rte_flow.h      |  32 +++++
 2 files changed, 273 insertions(+), 28 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index ffb1962..0a5ac4f 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -425,6 +425,19 @@ ixgbe_parse_syn_filter(const struct rte_flow_attr *attr,
 				struct rte_eth_syn_filter *filter,
 				struct rte_flow_error *error);
 static int
+cons_parse_l2_tn_filter(const struct rte_flow_attr *attr,
+		const struct rte_flow_item pattern[],
+		const struct rte_flow_action actions[],
+		struct rte_eth_l2_tunnel_conf *filter,
+		struct rte_flow_error *error);
+static int
+ixgbe_validate_l2_tn_filter(struct rte_eth_dev *dev,
+			const struct rte_flow_attr *attr,
+			const struct rte_flow_item pattern[],
+			const struct rte_flow_action actions[],
+			struct rte_eth_l2_tunnel_conf *rule,
+			struct rte_flow_error *error);
+static int
 ixgbe_flow_validate(__rte_unused struct rte_eth_dev *dev,
 		const struct rte_flow_attr *attr,
 		const struct rte_flow_item pattern[],
@@ -8939,41 +8952,175 @@ ixgbe_parse_syn_filter(const struct rte_flow_attr *attr,
 }
 
 /**
- * Check if the flow rule is supported by ixgbe.
- * It only checkes the format. Don't guarantee the rule can be programmed into
- * the HW. Because there can be no enough room for the rule.
+ * Parse the rule to see if it is a L2 tunnel rule.
+ * And get the L2 tunnel filter info BTW.
+ * Only support E-tag now.
  */
 static int
-ixgbe_flow_validate(__rte_unused struct rte_eth_dev *dev,
-		const struct rte_flow_attr *attr,
-		const struct rte_flow_item pattern[],
-		const struct rte_flow_action actions[],
-		struct rte_flow_error *error)
+cons_parse_l2_tn_filter(const struct rte_flow_attr *attr,
+			const struct rte_flow_item pattern[],
+			const struct rte_flow_action actions[],
+			struct rte_eth_l2_tunnel_conf *filter,
+			struct rte_flow_error *error)
 {
-	struct rte_eth_ntuple_filter ntuple_filter;
-	struct rte_eth_ethertype_filter ethertype_filter;
-	struct rte_eth_syn_filter syn_filter;
-	int ret;
+	const struct rte_flow_item *item;
+	const struct rte_flow_item_e_tag *e_tag_spec;
+	const struct rte_flow_item_e_tag *e_tag_mask;
+	const struct rte_flow_action *act;
+	const struct rte_flow_action_queue *act_q;
+	uint32_t index, j;
 
-	memset(&ntuple_filter, 0, sizeof(struct rte_eth_ntuple_filter));
-	ret = ixgbe_parse_ntuple_filter(attr, pattern,
-				actions, &ntuple_filter, error);
-	if (!ret)
-		return 0;
+	if (!pattern) {
+		rte_flow_error_set(error, EINVAL,
+			RTE_FLOW_ERROR_TYPE_ITEM_NUM,
+			NULL, "NULL pattern.");
+		return -rte_errno;
+	}
 
-	memset(&ethertype_filter, 0, sizeof(struct rte_eth_ethertype_filter));
-	ret = ixgbe_parse_ethertype_filter(attr, pattern,
-				actions, &ethertype_filter, error);
-	if (!ret)
-		return 0;
+	/* parse pattern */
+	index = 0;
 
-	memset(&syn_filter, 0, sizeof(struct rte_eth_syn_filter));
-	ret = ixgbe_parse_syn_filter(attr, pattern,
-				actions, &syn_filter, error);
-	if (!ret)
-		return 0;
+	/* The first not void item should be e-tag. */
+	NEXT_ITEM_OF_PATTERN(item, pattern, index);
+	if (item->type != RTE_FLOW_ITEM_TYPE_E_TAG) {
+		memset(filter, 0, sizeof(struct rte_eth_l2_tunnel_conf));
+		rte_flow_error_set(error, EINVAL,
+			RTE_FLOW_ERROR_TYPE_ITEM,
+			item, "Not supported by L2 tunnel filter");
+		return -rte_errno;
+	}
 
-	return ret;
+	if (!item->spec || !item->mask) {
+		memset(filter, 0, sizeof(struct rte_eth_l2_tunnel_conf));
+		rte_flow_error_set(error, EINVAL, RTE_FLOW_ERROR_TYPE_ITEM,
+			item, "Not supported by L2 tunnel filter");
+		return -rte_errno;
+	}
+
+	/*Not supported last point for range*/
+	if (item->last) {
+		rte_flow_error_set(error, EINVAL,
+			RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+			item, "Not supported last point for range");
+		return -rte_errno;
+	}
+
+	e_tag_spec = (const struct rte_flow_item_e_tag *)item->spec;
+	e_tag_mask = (const struct rte_flow_item_e_tag *)item->mask;
+
+	/* Src & dst MAC address should be masked. */
+	for (j = 0; j < ETHER_ADDR_LEN; j++) {
+		if (e_tag_mask->src.addr_bytes[j] ||
+		    e_tag_mask->dst.addr_bytes[j]) {
+			memset(filter, 0,
+			       sizeof(struct rte_eth_l2_tunnel_conf));
+			rte_flow_error_set(error, EINVAL,
+				RTE_FLOW_ERROR_TYPE_ITEM,
+				item, "Not supported by L2 tunnel filter");
+			return -rte_errno;
+		}
+	}
+
+	/* Only care about GRP and E cid base. */
+	if (e_tag_mask->e_tag_ethertype ||
+	    e_tag_mask->e_pcp ||
+	    e_tag_mask->dei ||
+	    e_tag_mask->in_e_cid_base ||
+	    e_tag_mask->in_e_cid_ext ||
+	    e_tag_mask->e_cid_ext ||
+	    e_tag_mask->type ||
+	    e_tag_mask->tags ||
+	    e_tag_mask->grp != 0x3 ||
+	    e_tag_mask->e_cid_base != 0xFFF) {
+		memset(filter, 0, sizeof(struct rte_eth_l2_tunnel_conf));
+		rte_flow_error_set(error, EINVAL,
+			RTE_FLOW_ERROR_TYPE_ITEM,
+			item, "Not supported by L2 tunnel filter");
+		return -rte_errno;
+	}
+
+	filter->l2_tunnel_type = RTE_L2_TUNNEL_TYPE_E_TAG;
+	/**
+	 * grp and e_cid_base are bit fields and only use 14 bits.
+	 * e-tag id is taken as little endian by HW.
+	 */
+	filter->tunnel_id = e_tag_spec->grp << 12;
+	filter->tunnel_id |= rte_be_to_cpu_16(e_tag_spec->e_cid_base);
+
+	/* check if the next not void item is END */
+	index++;
+	NEXT_ITEM_OF_PATTERN(item, pattern, index);
+	if (item->type != RTE_FLOW_ITEM_TYPE_END) {
+		memset(filter, 0, sizeof(struct rte_eth_l2_tunnel_conf));
+		rte_flow_error_set(error, EINVAL,
+			RTE_FLOW_ERROR_TYPE_ITEM,
+			item, "Not supported by L2 tunnel filter");
+		return -rte_errno;
+	}
+
+	/* parse attr */
+	/* must be input direction */
+	if (!attr->ingress) {
+		memset(filter, 0, sizeof(struct rte_eth_l2_tunnel_conf));
+		rte_flow_error_set(error, EINVAL,
+			RTE_FLOW_ERROR_TYPE_ATTR_INGRESS,
+			attr, "Only support ingress.");
+		return -rte_errno;
+	}
+
+	/* not supported */
+	if (attr->egress) {
+		memset(filter, 0, sizeof(struct rte_eth_l2_tunnel_conf));
+		rte_flow_error_set(error, EINVAL,
+			RTE_FLOW_ERROR_TYPE_ATTR_EGRESS,
+			attr, "Not support egress.");
+		return -rte_errno;
+	}
+
+	/* not supported */
+	if (attr->priority) {
+		memset(filter, 0, sizeof(struct rte_eth_l2_tunnel_conf));
+		rte_flow_error_set(error, EINVAL,
+			RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY,
+			attr, "Not support priority.");
+		return -rte_errno;
+	}
+
+	/* parse action */
+	index = 0;
+
+	if (!actions) {
+		rte_flow_error_set(error, EINVAL,
+				   RTE_FLOW_ERROR_TYPE_ACTION_NUM,
+				   NULL, "NULL action.");
+		return -rte_errno;
+	}
+
+	/* check if the first not void action is QUEUE. */
+	NEXT_ITEM_OF_ACTION(act, actions, index);
+	if (act->type != RTE_FLOW_ACTION_TYPE_QUEUE) {
+		memset(filter, 0, sizeof(struct rte_eth_l2_tunnel_conf));
+		rte_flow_error_set(error, EINVAL,
+			RTE_FLOW_ERROR_TYPE_ACTION,
+			act, "Not supported action.");
+		return -rte_errno;
+	}
+
+	act_q = (const struct rte_flow_action_queue *)act->conf;
+	filter->pool = act_q->index;
+
+	/* check if the next not void item is END */
+	index++;
+	NEXT_ITEM_OF_ACTION(act, actions, index);
+	if (act->type != RTE_FLOW_ACTION_TYPE_END) {
+		memset(filter, 0, sizeof(struct rte_eth_l2_tunnel_conf));
+		rte_flow_error_set(error, EINVAL,
+			RTE_FLOW_ERROR_TYPE_ACTION,
+			act, "Not supported action.");
+		return -rte_errno;
+	}
+
+	return 0;
 }
 
 /*  Destroy all flow rules associated with a port on ixgbe. */
@@ -9006,6 +9153,72 @@ ixgbe_flow_flush(struct rte_eth_dev *dev,
 	return 0;
 }
 
+static int
+ixgbe_validate_l2_tn_filter(struct rte_eth_dev *dev,
+			const struct rte_flow_attr *attr,
+			const struct rte_flow_item pattern[],
+			const struct rte_flow_action actions[],
+			struct rte_eth_l2_tunnel_conf *l2_tn_filter,
+			struct rte_flow_error *error)
+{
+	int ret = 0;
+	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+
+	ret = cons_parse_l2_tn_filter(attr, pattern,
+				actions, l2_tn_filter, error);
+
+	if (hw->mac.type != ixgbe_mac_X550 &&
+		hw->mac.type != ixgbe_mac_X550EM_x &&
+		hw->mac.type != ixgbe_mac_X550EM_a) {
+		return -ENOTSUP;
+	}
+
+	return ret;
+}
+
+/**
+ * Check if the flow rule is supported by ixgbe.
+ * It only checkes the format. Don't guarantee the rule can be programmed into
+ * the HW. Because there can be no enough room for the rule.
+ */
+static int
+ixgbe_flow_validate(__rte_unused struct rte_eth_dev *dev,
+		const struct rte_flow_attr *attr,
+		const struct rte_flow_item pattern[],
+		const struct rte_flow_action actions[],
+		struct rte_flow_error *error)
+{
+	struct rte_eth_ntuple_filter ntuple_filter;
+	struct rte_eth_ethertype_filter ethertype_filter;
+	struct rte_eth_syn_filter syn_filter;
+	struct rte_eth_l2_tunnel_conf l2_tn_filter;
+	int ret;
+
+	memset(&ntuple_filter, 0, sizeof(struct rte_eth_ntuple_filter));
+	ret = ixgbe_parse_ntuple_filter(attr, pattern,
+				actions, &ntuple_filter, error);
+	if (!ret)
+		return 0;
+
+	memset(&ethertype_filter, 0, sizeof(struct rte_eth_ethertype_filter));
+	ret = ixgbe_parse_ethertype_filter(attr, pattern,
+				actions, &ethertype_filter, error);
+	if (!ret)
+		return 0;
+
+	memset(&syn_filter, 0, sizeof(struct rte_eth_syn_filter));
+	ret = ixgbe_parse_syn_filter(attr, pattern,
+				actions, &syn_filter, error);
+	if (!ret)
+		return 0;
+
+		memset(&l2_tn_filter, 0, sizeof(struct rte_eth_l2_tunnel_conf));
+	ret = ixgbe_validate_l2_tn_filter(dev, attr, pattern,
+				actions, &l2_tn_filter, error);
+
+	return ret;
+}
+
 RTE_PMD_REGISTER_PCI(net_ixgbe, rte_ixgbe_pmd.pci_drv);
 RTE_PMD_REGISTER_PCI_TABLE(net_ixgbe, pci_id_ixgbe_map);
 RTE_PMD_REGISTER_KMOD_DEP(net_ixgbe, "* igb_uio | uio_pci_generic | vfio");
diff --git a/lib/librte_ether/rte_flow.h b/lib/librte_ether/rte_flow.h
index 98084ac..e9e6220 100644
--- a/lib/librte_ether/rte_flow.h
+++ b/lib/librte_ether/rte_flow.h
@@ -268,6 +268,13 @@ enum rte_flow_item_type {
 	 * See struct rte_flow_item_vxlan.
 	 */
 	RTE_FLOW_ITEM_TYPE_VXLAN,
+
+	/**
+	  * Matches a E_TAG header.
+	  *
+	  * See struct rte_flow_item_e_tag.
+	  */
+	RTE_FLOW_ITEM_TYPE_E_TAG,
 };
 
 /**
@@ -454,6 +461,31 @@ struct rte_flow_item_vxlan {
 };
 
 /**
+ * RTE_FLOW_ITEM_TYPE_E_TAG.
+ *
+ * Matches a E-tag header.
+ */
+struct rte_flow_item_e_tag {
+	struct ether_addr dst; /**< Destination MAC. */
+	struct ether_addr src; /**< Source MAC. */
+	uint16_t e_tag_ethertype; /**< E-tag EtherType, 0x893F. */
+	uint16_t e_pcp:3; /**<  E-PCP */
+	uint16_t dei:1; /**< DEI */
+	uint16_t in_e_cid_base:12; /**< Ingress E-CID base */
+	uint16_t rsv:2; /**< reserved */
+	uint16_t grp:2; /**< GRP */
+	uint16_t e_cid_base:12; /**< E-CID base */
+	uint16_t in_e_cid_ext:8; /**< Ingress E-CID extend */
+	uint16_t e_cid_ext:8; /**< E-CID extend */
+	uint16_t type; /**< MAC type. */
+	unsigned int tags; /**< Number of 802.1Q/ad tags defined. */
+	struct {
+		uint16_t tpid; /**< Tag protocol identifier. */
+		uint16_t tci; /**< Tag control information. */
+	} tag[]; /**< 802.1Q/ad tag definitions, outermost first. */
+};
+
+/**
  * Matching pattern item definition.
  *
  * A pattern is formed by stacking items starting from the lowest protocol
-- 
2.5.5