diff options
| author | Michał Winiarski <michal.winiarski@intel.com> | 2025-07-02 12:35:18 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2025-07-14 22:58:13 +0300 |
| commit | 5a8f77e24a30bbce2fa57926f3dede84894fd10a (patch) | |
| tree | 70be927c549e351289cd5acaf6564b4ac3034960 /drivers/pci/pci.h | |
| parent | 19272b37aa4f83ca52bdf9c16d5d81bdd1354494 (diff) | |
| download | linux-5a8f77e24a30bbce2fa57926f3dede84894fd10a.tar.xz | |
PCI/IOV: Restore VF resizable BAR state after reset
Similar to regular resizable BARs, VF BARs can also be resized, e.g. by the
system firmware or the PCI subsystem itself.
The capability layout is the same as PCI_EXT_CAP_ID_REBAR.
Add the capability ID and restore it as a part of IOV state.
See PCIe r6.2, sec 7.8.7.
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patch.msgid.link/20250702093522.518099-2-michal.winiarski@intel.com
Diffstat (limited to 'drivers/pci/pci.h')
| -rw-r--r-- | drivers/pci/pci.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 12215ee72afb..69258c445b28 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -486,6 +486,7 @@ struct pci_sriov { u16 subsystem_vendor; /* VF subsystem vendor */ u16 subsystem_device; /* VF subsystem device */ resource_size_t barsz[PCI_SRIOV_NUM_BARS]; /* VF BAR size */ + u16 vf_rebar_cap; /* VF Resizable BAR capability offset */ bool drivers_autoprobe; /* Auto probing of VFs by driver */ }; @@ -710,6 +711,13 @@ void pci_iov_update_resource(struct pci_dev *dev, int resno); resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno); void pci_restore_iov_state(struct pci_dev *dev); int pci_iov_bus_range(struct pci_bus *bus); +static inline u16 pci_iov_vf_rebar_cap(struct pci_dev *dev) +{ + if (!dev->is_physfn) + return 0; + + return dev->sriov->vf_rebar_cap; +} static inline bool pci_resource_is_iov(int resno) { return resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END; @@ -734,6 +742,10 @@ static inline int pci_iov_bus_range(struct pci_bus *bus) { return 0; } +static inline u16 pci_iov_vf_rebar_cap(struct pci_dev *dev) +{ + return 0; +} static inline bool pci_resource_is_iov(int resno) { return false; |