diff mbox

[dpdk-dev] net/ixgbe: fix VFIO interrupt mapping in PF

Message ID 1505895102-58446-1-git-send-email-wei.dai@intel.com (mailing list archive)
State Superseded, archived
Headers

Checks

Context Check Description
ci/checkpatch warning coding style issues
ci/Intel-compilation success Compilation OK

Commit Message

Wei Dai Sept. 20, 2017, 8:11 a.m. UTC 
  When a PF port is bound to VFIO-PIC, only miscellaneous interrupt
is mapped to VFIO vector 0 in ixgbe_dev_init( ).
In ixgbe_dev_start(), if previous VFIO interrupt mapping set in
ixgbe_dev_init( ) is not cleard, it will fail when calling
rte_intr_enable( ) tries to map Rx queue interrupt to other VFIO
vectors. This patch clears the VFIO interrupt mappings before
setting both miscellaneous and Rx queue interrupt mappings again
to avoid failure.

Fixes: 0a45657a6794 ("pci: rework interrupt handling")
Cc: stable@dpdk.org

Signed-off-by: Wei Dai <wei.dai@intel.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 9 +++++++++
 1 file changed, 9 insertions(+)
diff mbox

Patch

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 9ca5cbc..9030d3d 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -2692,6 +2692,15 @@  ixgbe_dev_start(struct rte_eth_dev *dev)
 				     " no intr multiplex");
 	}
 
+	/* When a PF port is bound to VFIO-PCI only miscellaneous interrupt
+	*  is mapped to VFIO vector 0 in ixgbe_dev_init( ).
+	*  If previous VFIO interrupt mapping set in ixgbe_dev_init( ) is
+	*  not cleared, it will fail when following rte_intr_enable( ) tries
+	*  to map Rx queue interrupt to other VFIO vectors.
+	*  So clear uio/vfio intr/evevnfd first to avoid failure.
+	*/
+	rte_intr_disable(intr_handle);
+
 	/* check if rxq interrupt is enabled */
 	if (dev->data->dev_conf.intr_conf.rxq != 0 &&
 	    rte_intr_dp_is_en(intr_handle))