From: Maxime Coquelin <maxime.coquelin@redhat.com>
Date: Tue, 26 Jan 2021 10:16:01 +0000 (+0100)
Subject: net/virtio: introduce PCI device metadata
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=f305ecbbb7c3ed3c06c24f094258757bcb395898;p=dpdk.git

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 68f233356d..5bbff2790f 100644
--- 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 1692268f30..345d73f868 100644
--- 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 d5ef74b1ee..6793d33d9f 100644
--- 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