[dpdk-dev] [PATCH v2 2/2] net/i40e: fix Rx queue interrupt mapping in VF

[Wei Dai]

When a VF port is bound to VFIO-PCI, miscellaneous interrupt is
mapped to MSI-X vector 0 and Rx queues interrupt are mapped to
other vectors in vfio_enable_msix( ). To simplify implementation,
all VFIO-PCI bound i40e VF Rx queue interrupts can be mapped in
vector 1. And as current igb_uio only support only one vector,
i40e VF PMD should use vector 0 for igb_uio and vector 1 for
VFIO-PCI. Without this patch, VF Rx queue interrupt is mapped
to vector 0 in register settings and mapped to VFIO vector 1
in vfio_enable_msix( ), and then all Rx queue interrupts will
be missed.

Fixes: 4b90a3ff26c5 ("i40evf: support Rx interrupt")
Fixes: 975ffea6f671 ("net/i40e: remove DPDK PF version specific code")
Cc: stable at dpdk.org

Signed-off-by: Wei Dai <wei.dai at intel.com>
---
 drivers/net/i40e/i40e_ethdev_vf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index 46dac86..70ff3fd 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -654,7 +654,7 @@ i40evf_config_irq_map(struct rte_eth_dev *dev)
 	int i, err;
 
 	if (rte_intr_allow_others(intr_handle))
-		vector_id = I40EVF_VSI_DEFAULT_MSIX_INTR_LNX;
+		vector_id = I40E_RX_VEC_START;
 	else
 		vector_id = I40E_MISC_VEC_ID;
 
-- 
2.7.4