[PATCH 17/19] net/ngbe: support Rx interrupt

[Jiawen Wu]

Implement Rx queue interrupt enable/disable functions.

Signed-off-by: Jiawen Wu <jiawenwu at trustnetic.com>
---
 doc/guides/nics/features/ngbe.ini |  1 +
 doc/guides/nics/ngbe.rst          |  1 +
 drivers/net/ngbe/ngbe_ethdev.c    | 33 ++++++++++++++++++++++++++++++-
 3 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/doc/guides/nics/features/ngbe.ini b/doc/guides/nics/features/ngbe.ini
index 1dfd92e96b..7b1f12bf95 100644
--- a/doc/guides/nics/features/ngbe.ini
+++ b/doc/guides/nics/features/ngbe.ini
@@ -8,6 +8,7 @@ Speed capabilities   = Y
 Link speed configuration = Y
 Link status          = Y
 Link status event    = Y
+Rx interrupt         = Y
 Free Tx mbuf on demand = Y
 Queue start/stop     = Y
 Burst mode info      = Y
diff --git a/doc/guides/nics/ngbe.rst b/doc/guides/nics/ngbe.rst
index 44d34197a6..e31600c95a 100644
--- a/doc/guides/nics/ngbe.rst
+++ b/doc/guides/nics/ngbe.rst
@@ -27,6 +27,7 @@ Features
 - Scattered and gather for TX and RX
 - IEEE 1588
 - FW version
+- Interrupt mode for RX
 
 
 Prerequisites
diff --git a/drivers/net/ngbe/ngbe_ethdev.c b/drivers/net/ngbe/ngbe_ethdev.c
index d7fc4bc70b..b9618cc074 100644
--- a/drivers/net/ngbe/ngbe_ethdev.c
+++ b/drivers/net/ngbe/ngbe_ethdev.c
@@ -2743,6 +2743,35 @@ ngbe_uc_all_hash_table_set(struct rte_eth_dev *dev, uint8_t on)
 	return 0;
 }
 
+static int
+ngbe_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
+{
+	struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(dev);
+	struct rte_intr_handle *intr_handle = pci_dev->intr_handle;
+	struct ngbe_hw *hw = ngbe_dev_hw(dev);
+	uint32_t mask;
+
+	mask = rd32(hw, NGBE_IMC(0));
+	mask |= (1 << queue_id);
+	wr32(hw, NGBE_IMC(0), mask);
+	rte_intr_enable(intr_handle);
+
+	return 0;
+}
+
+static int
+ngbe_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
+{
+	struct ngbe_hw *hw = ngbe_dev_hw(dev);
+	uint32_t mask;
+
+	mask = rd32(hw, NGBE_IMS(0));
+	mask |= (1 << queue_id);
+	wr32(hw, NGBE_IMS(0), mask);
+
+	return 0;
+}
+
 /**
  * Set the IVAR registers, mapping interrupt causes to vectors
  * @param hw
@@ -2770,7 +2799,7 @@ ngbe_set_ivar_map(struct ngbe_hw *hw, int8_t direction,
 		wr32(hw, NGBE_IVARMISC, tmp);
 	} else {
 		/* rx or tx causes */
-		/* Workaround for ICR lost */
+		msix_vector |= NGBE_IVAR_VLD; /* Workaround for ICR lost */
 		idx = ((16 * (queue & 1)) + (8 * direction));
 		tmp = rd32(hw, NGBE_IVAR(queue >> 1));
 		tmp &= ~(0xFF << idx);
@@ -3202,6 +3231,8 @@ static const struct eth_dev_ops ngbe_eth_dev_ops = {
 	.rx_queue_release           = ngbe_dev_rx_queue_release,
 	.tx_queue_setup             = ngbe_dev_tx_queue_setup,
 	.tx_queue_release           = ngbe_dev_tx_queue_release,
+	.rx_queue_intr_enable       = ngbe_dev_rx_queue_intr_enable,
+	.rx_queue_intr_disable      = ngbe_dev_rx_queue_intr_disable,
 	.dev_led_on                 = ngbe_dev_led_on,
 	.dev_led_off                = ngbe_dev_led_off,
 	.flow_ctrl_get              = ngbe_flow_ctrl_get,
-- 
2.27.0