[dpdk-dev] [PATCH v2] e1000: configure VLAN TPID

Beilei Xing beilei.xing at intel.com
Fri Jun 3 04:59:15 CEST 2016


This patch enables configuring the ether types of both inner and
outer VLANs. Note that outer TPID of single VLAN and inner TPID of
double VLAN are read only.

Signed-off-by: Beilei Xing <beilei.xing at intel.com>
---
v2 changes:
 Modify return value. Cause inner tpid is not supported by single vlan,
 return -ENOTSUP.
 Add return value. If want to set inner TPID of double vlan or set outer
 tpid of single vlan, return -ENOTSUP.
    
 drivers/net/e1000/igb_ethdev.c | 38 +++++++++++++++++++++++++++++++++++---
 1 file changed, 35 insertions(+), 3 deletions(-)

diff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c
index f0921ee..5d37e2c 100644
--- a/drivers/net/e1000/igb_ethdev.c
+++ b/drivers/net/e1000/igb_ethdev.c
@@ -86,6 +86,14 @@
 #define E1000_INCVALUE_82576         (16 << IGB_82576_TSYNC_SHIFT)
 #define E1000_TSAUXC_DISABLE_SYSTIME 0x80000000
 
+/* CTRL_EXT bit mask*/
+#define E1000_CTRL_EXT_EXT_VLAN      (1 << 26)
+
+/* VLAN Ether Type bit mask */
+#define E1000_VET_VET_EXT            0xFFFF0000
+
+#define E1000_VET_VET_EXT_SHIFT      16
+
 static int  eth_igb_configure(struct rte_eth_dev *dev);
 static int  eth_igb_start(struct rte_eth_dev *dev);
 static void eth_igb_stop(struct rte_eth_dev *dev);
@@ -2237,13 +2245,37 @@ eth_igb_vlan_tpid_set(struct rte_eth_dev *dev,
 {
 	struct e1000_hw *hw =
 		E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
-	uint32_t reg = ETHER_TYPE_VLAN;
+	uint32_t reg;
+	uint32_t qinq;
 	int ret = 0;
 
+	qinq = E1000_READ_REG(hw, E1000_CTRL_EXT);
+	qinq &= E1000_CTRL_EXT_EXT_VLAN;
+
 	switch (vlan_type) {
 	case ETH_VLAN_TYPE_INNER:
-		reg |= (tpid << 16);
-		E1000_WRITE_REG(hw, E1000_VET, reg);
+		if (qinq) {
+			ret = -ENOTSUP;
+			PMD_DRV_LOG(WARNING,
+				    "Inner vlan ether type is read-only\n");
+		} else {
+			ret = -ENOTSUP;
+			PMD_DRV_LOG(ERR, "Inner type is not supported"
+				    " by single vlan\n");
+		}
+		break;
+	case ETH_VLAN_TYPE_OUTER:
+		if (qinq) {
+			reg = E1000_READ_REG(hw, E1000_VET);
+			reg = (reg & (~E1000_VET_VET_EXT)) |
+				((uint32_t)tpid << E1000_VET_VET_EXT_SHIFT);
+			E1000_WRITE_REG(hw, E1000_VET, reg);
+		} else {
+			ret = -ENOTSUP;
+			PMD_DRV_LOG(WARNING,
+				    "Single vlan ether type is read-only\n");
+		}
+
 		break;
 	default:
 		ret = -EINVAL;
-- 
2.5.0



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