diff options
| author | Michał Winiarski <michal.winiarski@intel.com> | 2025-07-02 11:35:20 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2025-07-14 15:04:18 -0500 |
| commit | e200f4f7eab52bb7affcd92bf079958326c154d5 (patch) | |
| tree | 32b355f0f90de07624b6c46a2607d19b5724b07a /drivers/pci/pci.h | |
| parent | 535bdbeaacf96a8c4ef8d726382fb8fae97f168f (diff) | |
PCI/IOV: Allow IOV resources to be resized in pci_resize_resource()
Similar to regular resizable BARs, VF BARs can also be resized.
The capability layout is the same as PCI_EXT_CAP_ID_REBAR, which means we
can reuse most of the implementation, the only difference being resource
size calculation (which is multiplied by total VFs) and memory decoding
(which is controlled by a separate VF MSE field in SR-IOV cap).
Extend the pci_resize_resource() function to accept IOV resources.
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>
Link: https://patch.msgid.link/20250702093522.518099-4-michal.winiarski@intel.com
Diffstat (limited to 'drivers/pci/pci.h')
| -rw-r--r-- | drivers/pci/pci.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 190e4c115014..c7430afe7515 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -711,6 +711,9 @@ 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); +void pci_iov_resource_set_size(struct pci_dev *dev, int resno, + resource_size_t size); +bool pci_iov_is_memory_decoding_enabled(struct pci_dev *dev); static inline u16 pci_iov_vf_rebar_cap(struct pci_dev *dev) { if (!dev->is_physfn) @@ -750,6 +753,12 @@ static inline int pci_iov_bus_range(struct pci_bus *bus) { return 0; } +static inline void pci_iov_resource_set_size(struct pci_dev *dev, int resno, + resource_size_t size) { } +static inline bool pci_iov_is_memory_decoding_enabled(struct pci_dev *dev) +{ + return false; +} static inline u16 pci_iov_vf_rebar_cap(struct pci_dev *dev) { return 0; |