[dpdk-dev] [PATCH 2/3] vmxnet3: Fix VLAN filtering

[Stephen Hemminger]

From: "Charles (Chas) Williams" <ciwillia at brocade.com>

During an MTU change, the adapter is restarted.  If hardware VLAN offload
is in use, this existing filter table would also be cleared.  Instead,
setup the shadow table once during device initialization and just update
during restart.

vmxnet3_dev_vlan_offload_set(dev, mask) was incorrectly treating the
mask parameter as the bitmask for vlan_strip and vlan_filter, whereas
the mask indicates only what has changed - the values for
vlan_stripping and vlan_filter needs to be taken from dev_conf.rxmode.

Signed-off-by: "Charles (Chas) Williams" <ciwillia at brocade.com>
Signed-off-by: Nachiketa Prachanda <nprachan at brocade.com>
Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
---
 drivers/net/vmxnet3/vmxnet3_ethdev.c | 62 +++++++++++++-----------------------
 1 file changed, 22 insertions(+), 40 deletions(-)

diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.c b/drivers/net/vmxnet3/vmxnet3_ethdev.c
index 585ee60..111ec8e 100644
--- a/drivers/net/vmxnet3/vmxnet3_ethdev.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethdev.c
@@ -89,8 +89,6 @@ static void vmxnet3_dev_info_get(struct rte_eth_dev *dev,
 static int vmxnet3_dev_vlan_filter_set(struct rte_eth_dev *dev,
 				       uint16_t vid, int on);
 static void vmxnet3_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
-static void vmxnet3_dev_vlan_offload_set_clear(struct rte_eth_dev *dev,
-						int mask, int clear);
 
 #if PROCESS_SYS_EVENTS == 1
 static void vmxnet3_process_events(struct vmxnet3_hw *);
@@ -294,6 +292,9 @@ eth_vmxnet3_dev_init(struct rte_eth_dev *eth_dev)
 	/* Put device in Quiesce Mode */
 	VMXNET3_WRITE_BAR1_REG(hw, VMXNET3_REG_CMD, VMXNET3_CMD_QUIESCE_DEV);
 
+	/* allow untagged pkts */
+	VMXNET3_SET_VFTABLE_ENTRY(hw->shadow_vfta, 0);
+
 	return 0;
 }
 
@@ -430,7 +431,7 @@ vmxnet3_setup_driver_shared(struct rte_eth_dev *dev)
 	Vmxnet3_DSDevRead *devRead = &shared->devRead;
 	uint32_t *mac_ptr;
 	uint32_t val, i;
-	int ret, mask;
+	int ret;
 
 	shared->magic = VMXNET3_REV1_MAGIC;
 	devRead->misc.driverInfo.version = VMXNET3_DRIVER_VERSION_NUM;
@@ -512,14 +513,8 @@ vmxnet3_setup_driver_shared(struct rte_eth_dev *dev)
 		devRead->rssConfDesc.confPA  = hw->rss_confPA;
 	}
 
-	mask = 0;
-	if (dev->data->dev_conf.rxmode.hw_vlan_strip)
-		mask |= ETH_VLAN_STRIP_MASK;
-
-	if (dev->data->dev_conf.rxmode.hw_vlan_filter)
-		mask |= ETH_VLAN_FILTER_MASK;
-
-	vmxnet3_dev_vlan_offload_set_clear(dev, mask, 1);
+	vmxnet3_dev_vlan_offload_set(dev,
+			     ETH_VLAN_STRIP_MASK | ETH_VLAN_FILTER_MASK);
 
 	PMD_INIT_LOG(DEBUG,
 		     "Writing MAC Address : %02x:%02x:%02x:%02x:%02x:%02x",
@@ -836,44 +831,31 @@ vmxnet3_dev_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vid, int on)
 }
 
 static void
-vmxnet3_dev_vlan_offload_set_clear(struct rte_eth_dev *dev,
-				   int mask, int clear)
+vmxnet3_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 {
 	struct vmxnet3_hw *hw = dev->data->dev_private;
 	Vmxnet3_DSDevRead *devRead = &hw->shared->devRead;
 	uint32_t *vf_table = devRead->rxFilterConf.vfTable;
 
-	if (mask & ETH_VLAN_STRIP_MASK)
-		devRead->misc.uptFeatures |= UPT1_F_RXVLAN;
-	else
-		devRead->misc.uptFeatures &= ~UPT1_F_RXVLAN;
+	if (mask & ETH_VLAN_STRIP_MASK) {
+		if (dev->data->dev_conf.rxmode.hw_vlan_strip)
+			devRead->misc.uptFeatures |= UPT1_F_RXVLAN;
+		else
+			devRead->misc.uptFeatures &= ~UPT1_F_RXVLAN;
 
-	VMXNET3_WRITE_BAR1_REG(hw, VMXNET3_REG_CMD,
-			       VMXNET3_CMD_UPDATE_FEATURE);
-
-	if (mask & ETH_VLAN_FILTER_MASK) {
-		if (clear) {
-			memset(hw->shadow_vfta, 0,
-			       VMXNET3_VFT_TABLE_SIZE);
-			/* allow untagged pkts */
-			VMXNET3_SET_VFTABLE_ENTRY(hw->shadow_vfta, 0);
-		}
-		memcpy(vf_table, hw->shadow_vfta, VMXNET3_VFT_TABLE_SIZE);
-	} else {
-		/* allow any pkts -- no filtering */
-		if (clear)
-			memset(hw->shadow_vfta, 0xff, VMXNET3_VFT_TABLE_SIZE);
-		memset(vf_table, 0xff, VMXNET3_VFT_TABLE_SIZE);
+		VMXNET3_WRITE_BAR1_REG(hw, VMXNET3_REG_CMD,
+				       VMXNET3_CMD_UPDATE_FEATURE);
 	}
 
-	VMXNET3_WRITE_BAR1_REG(hw, VMXNET3_REG_CMD,
-			       VMXNET3_CMD_UPDATE_VLAN_FILTERS);
-}
+	if (mask & ETH_VLAN_FILTER_MASK) {
+		if (dev->data->dev_conf.rxmode.hw_vlan_filter)
+			memcpy(vf_table, hw->shadow_vfta, VMXNET3_VFT_TABLE_SIZE);
+		else
+			memset(vf_table, 0xff, VMXNET3_VFT_TABLE_SIZE);
 
-static void
-vmxnet3_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
-{
-	vmxnet3_dev_vlan_offload_set_clear(dev, mask, 0);
+		VMXNET3_WRITE_BAR1_REG(hw, VMXNET3_REG_CMD,
+				       VMXNET3_CMD_UPDATE_VLAN_FILTERS);
+	}
 }
 
 #if PROCESS_SYS_EVENTS == 1
-- 
2.1.4