net/virtio: introduce PCI device metadata

This patch initiate refactoring of Virtio PCI, by introducing
a new device structure for PCI-specific metadata.

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 68f2333..5bbff27 100644 (file)
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -2154,7 +2154,7 @@ static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
        if (vdpa == 1)
                return 1;
 
-       return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
+       return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_pci_dev),
                eth_virtio_dev_init);
 }
 

diff --git a/drivers/net/virtio/virtio_pci.c b/drivers/net/virtio/virtio_pci.c
index 1692268..345d73f 100644 (file)
--- a/drivers/net/virtio/virtio_pci.c
+++ b/drivers/net/virtio/virtio_pci.c
@@ -689,6 +689,8 @@ next:
 int
 vtpci_init(struct rte_pci_device *dev, struct virtio_hw *hw)
 {
+       RTE_BUILD_BUG_ON(offsetof(struct virtio_pci_dev, hw) != 0);
+
        /*
         * Try if we can succeed reading virtio pci caps, which exists
         * only on modern pci device. If failed, we fallback to legacy

diff --git a/drivers/net/virtio/virtio_pci.h b/drivers/net/virtio/virtio_pci.h
index d5ef74b..6793d33 100644 (file)
--- a/drivers/net/virtio/virtio_pci.h
+++ b/drivers/net/virtio/virtio_pci.h
@@ -289,6 +289,11 @@ struct virtio_hw {
        struct virtqueue **vqs;
 };
 
+struct virtio_pci_dev {
+       struct virtio_hw hw;
+};
+
+#define virtio_pci_get_dev(hwp) container_of(hwp, struct virtio_pci_dev, hw)
 
 /*
  * While virtio_hw is stored in shared memory, this structure stores