diff options
| author | Yishai Hadas <yishaih@nvidia.com> | 2023-12-19 11:32:44 +0200 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2023-12-19 11:51:33 -0700 |
| commit | c3fc3e098bd64c560dde49a6e72b21b055150abe (patch) | |
| tree | 5ec5f9c2d20616e98c9d0f4ba73ce86acb8d471b /drivers/virtio/virtio_pci_common.h | |
| parent | f51e146f1e5c9de02433e51f5a344556502d9c6a (diff) | |
virtio-pci: Introduce APIs to execute legacy IO admin commands
Introduce APIs to execute legacy IO admin commands.
It includes: io_legacy_read/write for both common and the device
configuration, io_legacy_notify_info.
In addition, exposing an API to check whether the legacy IO commands are
supported. (i.e. virtio_pci_admin_has_legacy_io()).
Those APIs will be used by the next patches from this series.
Note:
Unlike modern drivers which support hardware virtio devices, legacy
drivers assume software-based devices: e.g. they don't use proper memory
barriers on ARM, use big endian on PPC, etc. X86 drivers are mostly ok
though, more or less by chance. For now, only support legacy IO on X86.
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Link: https://lore.kernel.org/r/20231219093247.170936-7-yishaih@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/virtio/virtio_pci_common.h')
| -rw-r--r-- | drivers/virtio/virtio_pci_common.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/virtio/virtio_pci_common.h b/drivers/virtio/virtio_pci_common.h index a39bffd5fd46..7fef52bee455 100644 --- a/drivers/virtio/virtio_pci_common.h +++ b/drivers/virtio/virtio_pci_common.h @@ -156,6 +156,8 @@ static inline void virtio_pci_legacy_remove(struct virtio_pci_device *vp_dev) int virtio_pci_modern_probe(struct virtio_pci_device *); void virtio_pci_modern_remove(struct virtio_pci_device *); +struct virtio_device *virtio_pci_vf_get_pf_dev(struct pci_dev *pdev); + #define VIRTIO_LEGACY_ADMIN_CMD_BITMAP \ (BIT_ULL(VIRTIO_ADMIN_CMD_LEGACY_COMMON_CFG_WRITE) | \ BIT_ULL(VIRTIO_ADMIN_CMD_LEGACY_COMMON_CFG_READ) | \ |