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| author | Jason Gunthorpe <jgg@nvidia.com> | 2022-02-24 17:20:10 +0300 |
|---|---|---|
| committer | Leon Romanovsky <leonro@nvidia.com> | 2022-02-27 12:38:51 +0300 |
| commit | 21ca9fb62d4688da41825e0f05d8e7e26afc69d6 (patch) | |
| tree | 955bbb2dbc34c27364cfb7e270cc5655325833ee /include/linux/pci.h | |
| parent | cfb92440ee71adcc2105b0890bb01ac3cddb8507 (diff) | |
| download | linux-21ca9fb62d4688da41825e0f05d8e7e26afc69d6.tar.xz | |
PCI/IOV: Add pci_iov_vf_id() to get VF index
The PCI core uses the VF index internally, often called the vf_id,
during the setup of the VF, eg pci_iov_add_virtfn().
This index is needed for device drivers that implement live migration
for their internal operations that configure/control their VFs.
Specifically, mlx5_vfio_pci driver that is introduced in coming patches
from this series needs it and not the bus/device/function which is
exposed today.
Add pci_iov_vf_id() which computes the vf_id by reversing the math that
was used to create the bus/device/function.
Link: https://lore.kernel.org/all/20220224142024.147653-2-yishaih@nvidia.com
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Diffstat (limited to 'include/linux/pci.h')
| -rw-r--r-- | include/linux/pci.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h index 8253a5413d7c..3d4ff7b35ad1 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -2166,7 +2166,7 @@ void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar); #ifdef CONFIG_PCI_IOV int pci_iov_virtfn_bus(struct pci_dev *dev, int id); int pci_iov_virtfn_devfn(struct pci_dev *dev, int id); - +int pci_iov_vf_id(struct pci_dev *dev); int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn); void pci_disable_sriov(struct pci_dev *dev); @@ -2194,6 +2194,12 @@ static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id) { return -ENOSYS; } + +static inline int pci_iov_vf_id(struct pci_dev *dev) +{ + return -ENOSYS; +} + static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn) { return -ENODEV; } |