[dpdk-dev] [PATCH v3 2/2] net/i40e: add hot plug monitor in i40e

Jeff Guo jia.guo at intel.com
Thu Jun 29 07:01:50 CEST 2017


From: "Guo, Jia" <jia.guo at intel.com>

This patch enable the hot plug feature in i40e, by monitoring the
hot plug uevent of the device. When remove event got, call the app
callback function to handle the detach process.

Signed-off-by: Guo, Jia <jia.guo at intel.com>
---
v3->v2: refine the return issue if device remove
---
 drivers/net/i40e/i40e_ethdev.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 4ee1113..67ffc14 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -1283,6 +1283,7 @@ static inline void i40e_GLQF_reg_init(struct i40e_hw *hw)
 
 	/* enable uio intr after callback register */
 	rte_intr_enable(intr_handle);
+
 	/*
 	 * Add an ethertype filter to drop all flow control frames transmitted
 	 * from VSIs. By doing so, we stop VF from sending out PAUSE or PFC
@@ -5832,11 +5833,29 @@ struct i40e_vsi *
 {
 	struct rte_eth_dev *dev = (struct rte_eth_dev *)param;
 	struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	struct rte_uevent event;
 	uint32_t icr0;
+	struct rte_pci_device *pci_dev;
+	struct rte_intr_handle *intr_handle;
+
+	pci_dev = RTE_ETH_DEV_TO_PCI(dev);
+	intr_handle = &pci_dev->intr_handle;
 
 	/* Disable interrupt */
 	i40e_pf_disable_irq0(hw);
 
+	/* check device uevent */
+	if (rte_uevent_get(intr_handle->uevent_fd, &event) == 0) {
+		if (event.subsystem == RTE_UEVENT_SUBSYSTEM_UIO) {
+			if (event.action == RTE_UEVENT_REMOVE) {
+				_rte_eth_dev_callback_process(dev,
+					RTE_ETH_EVENT_INTR_RMV, NULL);
+				return;
+			}
+		}
+		goto done;
+	}
+
 	/* read out interrupt causes */
 	icr0 = I40E_READ_REG(hw, I40E_PFINT_ICR0);
 
-- 
1.8.3.1



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