diff mbox series

[vfio,06/11] virtio-pci: Introduce API to get PF virtio device from VF PCI device

Message ID 20230921124040.145386-7-yishaih@nvidia.com (mailing list archive)
State New, archived
Headers show
Series Introduce a vfio driver over virtio devices | expand

Commit Message

Yishai Hadas Sept. 21, 2023, 12:40 p.m. UTC 
From: Feng Liu <feliu@nvidia.com>

Introduce API to get PF virtio device from the given VF PCI device so
that other modules such as vfio in subsequent patch can use it.

Signed-off-by: Feng Liu <feliu@nvidia.com>
Reviewed-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
---
 drivers/virtio/virtio_pci_common.c | 12 ++++++++++++
 include/linux/virtio.h             |  1 +
 2 files changed, 13 insertions(+)
diff mbox series

Patch

diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c
index 7a3e6edc4dd6..c64484cd5b13 100644
--- a/drivers/virtio/virtio_pci_common.c
+++ b/drivers/virtio/virtio_pci_common.c
@@ -648,6 +648,18 @@  static struct pci_driver virtio_pci_driver = {
 	.sriov_configure = virtio_pci_sriov_configure,
 };
 
+struct virtio_device *virtio_pci_vf_get_pf_dev(struct pci_dev *pdev)
+{
+	struct virtio_pci_device *pf_vp_dev;
+
+	pf_vp_dev = pci_iov_get_pf_drvdata(pdev, &virtio_pci_driver);
+	if (IS_ERR(pf_vp_dev))
+		return NULL;
+
+	return &pf_vp_dev->vdev;
+}
+EXPORT_SYMBOL_GPL(virtio_pci_vf_get_pf_dev);
+
 module_pci_driver(virtio_pci_driver);
 
 MODULE_AUTHOR("Anthony Liguori <aliguori@us.ibm.com>");
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index 094a2ef1c8b8..4ae088ea9299 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -217,6 +217,7 @@  static inline struct virtio_driver *drv_to_virtio(struct device_driver *drv)
 
 int virtio_admin_cmd_exec(struct virtio_device *vdev,
 			  struct virtio_admin_cmd *cmd);
+struct virtio_device *virtio_pci_vf_get_pf_dev(struct pci_dev *pdev);
 
 int register_virtio_driver(struct virtio_driver *drv);
 void unregister_virtio_driver(struct virtio_driver *drv);