[dpdk-dev] [PATCH v3 1/8] e1000: add rx interrupt support

[Yong Liu <yong.liu@intel.com>]

Enable rx interrupt support on e1000 physical and emulated device.

Signed-off-by: Marvin Liu <yong.liu@intel.com>

diff --git a/drivers/net/e1000/em_ethdev.c b/drivers/net/e1000/em_ethdev.c
index 912f5dd..3be8269 100644
--- a/drivers/net/e1000/em_ethdev.c
+++ b/drivers/net/e1000/em_ethdev.c
@@ -81,6 +81,7 @@ static int eth_em_flow_ctrl_get(struct rte_eth_dev *dev,
 static int eth_em_flow_ctrl_set(struct rte_eth_dev *dev,
 				struct rte_eth_fc_conf *fc_conf);
 static int eth_em_interrupt_setup(struct rte_eth_dev *dev);
+static int eth_em_rxq_interrupt_setup(struct rte_eth_dev *dev);
 static int eth_em_interrupt_get_status(struct rte_eth_dev *dev);
 static int eth_em_interrupt_action(struct rte_eth_dev *dev);
 static void eth_em_interrupt_handler(struct rte_intr_handle *handle,
@@ -107,6 +108,7 @@ static void em_vlan_hw_strip_disable(struct rte_eth_dev *dev);
 static void eth_em_vlan_filter_set(struct rte_eth_dev *dev,
 					uint16_t vlan_id, int on);
 */
+static void em_rxq_intr_enable(struct e1000_hw *hw);
 static int eth_em_led_on(struct rte_eth_dev *dev);
 static int eth_em_led_off(struct rte_eth_dev *dev);
 
@@ -608,6 +610,9 @@ eth_em_start(struct rte_eth_dev *dev)
 			return ret;
 		}
 	}
+	/* check if rxq interrupt is enabled */
+	if (dev->data->dev_conf.intr_conf.rxq != 0)
+		eth_em_rxq_interrupt_setup(dev);
 
 	adapter->stopped = 0;
 
@@ -1277,6 +1282,42 @@ eth_em_interrupt_setup(struct rte_eth_dev *dev)
 }
 
 /*
+ * It clears the interrupt causes and enables the interrupt.
+ * It will be called once only during nic initialized.
+ *
+ * @param dev
+ *  Pointer to struct rte_eth_dev.
+ *
+ * @return
+ *  - On success, zero.
+ *  - On failure, a negative value.
+ */
+static int
+eth_em_rxq_interrupt_setup(struct rte_eth_dev *dev)
+{
+	struct e1000_hw *hw =
+	E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+
+	E1000_READ_REG(hw, E1000_ICR);
+	em_rxq_intr_enable(hw);
+	return 0;
+}
+
+/*
+ * It enable receive packet interrupt.
+ * @param hw
+ * Pointer to struct e1000_hw
+ *
+ * @return
+ */
+static void
+em_rxq_intr_enable(struct e1000_hw *hw)
+{
+	E1000_WRITE_REG(hw, E1000_IMS, E1000_IMS_RXT0);
+	E1000_WRITE_FLUSH(hw);
+}
+
+/*
  * It reads ICR and gets interrupt causes, check it and set a bit flag
  * to update link status.
  *
-- 
1.9.3