[dpdk-dev] [PATCH v2 10/18] net/ixgbe: flush all the filters

[Wei Zhao]

Add support for flush all the filters in SW.

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

---

v2:
--change flush filter function call relationship
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 118 ++++++++++++++++++++++++++++++++++++++-
 drivers/net/ixgbe/ixgbe_ethdev.h |   9 +++
 drivers/net/ixgbe/ixgbe_fdir.c   |  24 ++++++++
 drivers/net/ixgbe/ixgbe_pf.c     |   1 +
 4 files changed, 150 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index d68de65..0de1318 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -61,6 +61,8 @@
 #include <rte_random.h>
 #include <rte_dev.h>
 #include <rte_hash_crc.h>
+#include <rte_flow.h>
+#include <rte_flow_driver.h>
 
 #include "ixgbe_logs.h"
 #include "base/ixgbe_api.h"
@@ -386,7 +388,8 @@ static int ixgbe_dev_udp_tunnel_port_del(struct rte_eth_dev *dev,
 					 struct rte_eth_udp_tunnel *udp_tunnel);
 static int ixgbe_filter_restore(struct rte_eth_dev *dev);
 static void ixgbe_l2_tunnel_conf(struct rte_eth_dev *dev);
-
+static int ixgbe_flow_flush(struct rte_eth_dev *dev,
+		struct rte_flow_error *error);
 /*
  * Define VF Stats MACRO for Non "cleared on read" register
  */
@@ -765,7 +768,13 @@ static const struct rte_ixgbe_xstats_name_off rte_ixgbevf_stats_strings[] = {
 
 #define IXGBEVF_NB_XSTATS (sizeof(rte_ixgbevf_stats_strings) /	\
 		sizeof(rte_ixgbevf_stats_strings[0]))
-
+static const struct rte_flow_ops ixgbe_flow_ops = {
+	NULL,
+	NULL,
+	NULL,
+	ixgbe_flow_flush,
+	NULL,
+};
 /**
  * Atomically reads the link status information from global
  * structure rte_eth_dev.
@@ -6274,6 +6283,7 @@ ixgbe_add_del_ethertype_filter(struct rte_eth_dev *dev,
 		ethertype_filter.ethertype = filter->ether_type;
 		ethertype_filter.etqf = etqf;
 		ethertype_filter.etqs = etqs;
+		ethertype_filter.conf = FALSE;
 		ret = ixgbe_ethertype_filter_insert(filter_info,
 						    &ethertype_filter);
 		if (ret < 0) {
@@ -6393,6 +6403,11 @@ ixgbe_dev_filter_ctrl(struct rte_eth_dev *dev,
 	case RTE_ETH_FILTER_L2_TUNNEL:
 		ret = ixgbe_dev_l2_tunnel_filter_handle(dev, filter_op, arg);
 		break;
+	case RTE_ETH_FILTER_GENERIC:
+		if (filter_op != RTE_ETH_FILTER_GET)
+			return -EINVAL;
+		*(const void **)arg = &ixgbe_flow_ops;
+		break;
 	default:
 		PMD_DRV_LOG(WARNING, "Filter type (%d) not supported",
 							filter_type);
@@ -7986,6 +8001,105 @@ ixgbe_l2_tunnel_conf(struct rte_eth_dev *dev)
 	(void)ixgbe_update_e_tag_eth_type(hw, l2_tn_info->e_tag_ether_type);
 }
 
+/* remove all the n-tuple filters */
+static void
+ixgbe_clear_all_ntuple_filter(struct rte_eth_dev *dev)
+{
+	struct ixgbe_filter_info *filter_info =
+		IXGBE_DEV_PRIVATE_TO_FILTER_INFO(dev->data->dev_private);
+	struct ixgbe_5tuple_filter *p_5tuple;
+
+	while ((p_5tuple = TAILQ_FIRST(&filter_info->fivetuple_list)))
+		ixgbe_remove_5tuple_filter(dev, p_5tuple);
+}
+
+/* remove all the ether type filters */
+static void
+ixgbe_clear_all_ethertype_filter(struct rte_eth_dev *dev)
+{
+	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	struct ixgbe_filter_info *filter_info =
+		IXGBE_DEV_PRIVATE_TO_FILTER_INFO(dev->data->dev_private);
+	int i;
+
+	for (i = 0; i < IXGBE_MAX_ETQF_FILTERS; i++) {
+		if (filter_info->ethertype_mask & (1 << i) &&
+		    !filter_info->ethertype_filters[i].conf) {
+			(void)ixgbe_ethertype_filter_remove(filter_info,
+							    (uint8_t)i);
+			IXGBE_WRITE_REG(hw, IXGBE_ETQF(i), 0);
+			IXGBE_WRITE_REG(hw, IXGBE_ETQS(i), 0);
+			IXGBE_WRITE_FLUSH(hw);
+		}
+	}
+}
+
+/* remove the SYN filter */
+static void
+ixgbe_clear_syn_filter(struct rte_eth_dev *dev)
+{
+	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	struct ixgbe_filter_info *filter_info =
+		IXGBE_DEV_PRIVATE_TO_FILTER_INFO(dev->data->dev_private);
+
+	if (filter_info->syn_info & IXGBE_SYN_FILTER_ENABLE) {
+		filter_info->syn_info = 0;
+
+		IXGBE_WRITE_REG(hw, IXGBE_SYNQF, 0);
+		IXGBE_WRITE_FLUSH(hw);
+	}
+}
+
+/* remove all the L2 tunnel filters */
+static int
+ixgbe_clear_all_l2_tn_filter(struct rte_eth_dev *dev)
+{
+	struct ixgbe_l2_tn_info *l2_tn_info =
+		IXGBE_DEV_PRIVATE_TO_L2_TN_INFO(dev->data->dev_private);
+	struct ixgbe_l2_tn_filter *l2_tn_filter;
+	struct rte_eth_l2_tunnel_conf l2_tn_conf;
+	int ret = 0;
+
+	while ((l2_tn_filter = TAILQ_FIRST(&l2_tn_info->l2_tn_list))) {
+		l2_tn_conf.l2_tunnel_type = l2_tn_filter->key.l2_tn_type;
+		l2_tn_conf.tunnel_id      = l2_tn_filter->key.tn_id;
+		l2_tn_conf.pool           = l2_tn_filter->pool;
+		ret = ixgbe_dev_l2_tunnel_filter_del(dev, &l2_tn_conf);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+/*  Destroy all flow rules associated with a port on ixgbe. */
+static int
+ixgbe_flow_flush(struct rte_eth_dev *dev,
+		struct rte_flow_error *error)
+{
+	int ret = 0;
+
+	ixgbe_clear_all_ntuple_filter(dev);
+	ixgbe_clear_all_ethertype_filter(dev);
+	ixgbe_clear_syn_filter(dev);
+
+	ret = ixgbe_clear_all_fdir_filter(dev);
+	if (ret < 0) {
+		rte_flow_error_set(error, EINVAL, RTE_FLOW_ERROR_TYPE_HANDLE,
+					NULL, "Failed to flush rule");
+		return ret;
+	}
+
+	ret = ixgbe_clear_all_l2_tn_filter(dev);
+	if (ret < 0) {
+		rte_flow_error_set(error, EINVAL, RTE_FLOW_ERROR_TYPE_HANDLE,
+					NULL, "Failed to flush rule");
+		return ret;
+	}
+
+	return 0;
+}
+
 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/drivers/net/ixgbe/ixgbe_ethdev.h b/drivers/net/ixgbe/ixgbe_ethdev.h
index 6327962..9ed5f45 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.h
+++ b/drivers/net/ixgbe/ixgbe_ethdev.h
@@ -274,6 +274,11 @@ struct ixgbe_ethertype_filter {
 	uint16_t ethertype;
 	uint32_t etqf;
 	uint32_t etqs;
+	/**
+	 * If this filter is added by configuration,
+	 * it should not be removed.
+	 */
+	bool     conf;
 };
 
 /*
@@ -495,6 +500,7 @@ uint32_t ixgbe_convert_vm_rx_mask_to_val(uint16_t rx_mask, uint32_t orig_val);
 int ixgbe_fdir_ctrl_func(struct rte_eth_dev *dev,
 			enum rte_filter_op filter_op, void *arg);
 void ixgbe_fdir_filter_restore(struct rte_eth_dev *dev);
+int ixgbe_clear_all_fdir_filter(struct rte_eth_dev *dev);
 
 static inline int
 ixgbe_ethertype_filter_lookup(struct ixgbe_filter_info *filter_info,
@@ -525,6 +531,8 @@ ixgbe_ethertype_filter_insert(struct ixgbe_filter_info *filter_info,
 				ethertype_filter->etqf;
 			filter_info->ethertype_filters[i].etqs =
 				ethertype_filter->etqs;
+			filter_info->ethertype_filters[i].conf =
+				ethertype_filter->conf;
 			return i;
 		}
 	}
@@ -541,6 +549,7 @@ ixgbe_ethertype_filter_remove(struct ixgbe_filter_info *filter_info,
 	filter_info->ethertype_filters[idx].ethertype = 0;
 	filter_info->ethertype_filters[idx].etqf = 0;
 	filter_info->ethertype_filters[idx].etqs = 0;
+	filter_info->ethertype_filters[idx].etqs = FALSE;
 	return idx;
 }
 
diff --git a/drivers/net/ixgbe/ixgbe_fdir.c b/drivers/net/ixgbe/ixgbe_fdir.c
index d390972..7097dca 100644
--- a/drivers/net/ixgbe/ixgbe_fdir.c
+++ b/drivers/net/ixgbe/ixgbe_fdir.c
@@ -1514,3 +1514,27 @@ ixgbe_fdir_filter_restore(struct rte_eth_dev *dev)
 		}
 	}
 }
+
+/* remove all the flow director filters */
+int
+ixgbe_clear_all_fdir_filter(struct rte_eth_dev *dev)
+{
+	struct ixgbe_hw_fdir_info *fdir_info =
+		IXGBE_DEV_PRIVATE_TO_FDIR_INFO(dev->data->dev_private);
+	struct ixgbe_fdir_filter *fdir_filter;
+	int ret = 0;
+
+	/* flush flow director */
+	rte_hash_reset(fdir_info->hash_handle);
+	memset(fdir_info->hash_map, 0,
+	       sizeof(struct ixgbe_fdir_filter *) * IXGBE_MAX_FDIR_FILTER_NUM);
+	while ((fdir_filter = TAILQ_FIRST(&fdir_info->fdir_list))) {
+		TAILQ_REMOVE(&fdir_info->fdir_list,
+			     fdir_filter,
+			     entries);
+		rte_free(fdir_filter);
+	}
+	ret = ixgbe_fdir_flush(dev);
+
+	return ret;
+}
diff --git a/drivers/net/ixgbe/ixgbe_pf.c b/drivers/net/ixgbe/ixgbe_pf.c
index 6139915..5f017eb 100644
--- a/drivers/net/ixgbe/ixgbe_pf.c
+++ b/drivers/net/ixgbe/ixgbe_pf.c
@@ -197,6 +197,7 @@ ixgbe_add_tx_flow_control_drop_filter(struct rte_eth_dev *eth_dev)
 				IXGBE_ETQF_TX_ANTISPOOF |
 				IXGBE_ETHERTYPE_FLOW_CTRL;
 	ethertype_filter.etqs = 0;
+	ethertype_filter.conf = TRUE;
 	i = ixgbe_ethertype_filter_insert(filter_info,
 					  &ethertype_filter);
 	if (i < 0) {
-- 
2.5.5