[dpdk-dev] [PATCH v4 13/14] virtio: enable vfio in pmd driver

Santosh Shukla sshukla at mvista.com
Thu Jan 14 14:28:36 CET 2016


Using mapping api i.e. rte_eal_pci_map_device() to create vfio container, group
id and get the vfio-dev-fd for virtio-net-pci interface. Later vfio_dev_fd used
for virtio device rd/wr operation.

Signed-off-by: Santosh Shukla <sshukla at mvista.com>
---
v3->v4:
- Per stephens comment, removed static driver flag RTE_PCI_XXX_XX_NEED_MAPPING ,
  now vfio virtio pmd driver intialized vifio interface at runtime.

drivers/net/virtio/virtio_ethdev.c |   12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 8f2260f..ce03a24 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -497,6 +497,8 @@ virtio_dev_close(struct rte_eth_dev *dev)
 	hw->started = 0;
 	virtio_dev_free_mbufs(dev);
 	virtio_free_queues(dev);
+
+	/* For vfio case : hotunplug/unmap not supported (todo) */
 }
 
 static void
@@ -1286,6 +1288,16 @@ static int virtio_hw_init_by_vfio(struct virtio_hw *hw,
 		return -1;
 	}
 
+	/*
+	 * pci_map_device used not to actually map ioport region but
+	 * create vfio container/group and vfio-dev-fd for _this_
+	 * virtio interface.
+	 */
+	if (rte_eal_pci_map_device(pci_dev) != 0) {
+		PMD_INIT_LOG(ERR, "vfio pci mapping failed for ioport bar\n");
+		return -1;
+	}
+
 	/* .. So attached interface is vfio */
 	vdev->is_vfio = true;
 	vdev->pci_dev = pci_dev;
-- 
1.7.9.5



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