diff options
| author | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2025-11-13 20:00:45 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2025-11-14 12:34:21 -0600 |
| commit | a337869885083131e575c6367c679f4da4b68bb0 (patch) | |
| tree | b79365fa3efae2d6978759d8a9906d07696a4783 | |
| parent | 876e15943e9205096441cbe520dc9ccf82df8344 (diff) | |
PCI: Move pci_rebar_size_to_bytes() and export it
pci_rebar_size_to_bytes() is in drivers/pci/pci.h but would be useful for
endpoint drivers as well.
Move the function to rebar.c and export it.
In addition, convert the literal to where the number comes from
(PCI_REBAR_MIN_SIZE).
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patch.msgid.link/20251113180053.27944-4-ilpo.jarvinen@linux.intel.com
| -rw-r--r-- | drivers/pci/pci.h | 4 | ||||
| -rw-r--r-- | drivers/pci/rebar.c | 12 | ||||
| -rw-r--r-- | include/linux/pci.h | 1 |
3 files changed, 13 insertions, 4 deletions
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 41df35920632..a1e7dbeb0f2c 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -1024,10 +1024,6 @@ void pci_rebar_init(struct pci_dev *pdev); void pci_restore_rebar_state(struct pci_dev *pdev); int pci_rebar_get_current_size(struct pci_dev *pdev, int bar); int pci_rebar_set_size(struct pci_dev *pdev, int bar, int size); -static inline u64 pci_rebar_size_to_bytes(int size) -{ - return 1ULL << (size + 20); -} struct device_node; diff --git a/drivers/pci/rebar.c b/drivers/pci/rebar.c index f29810fe0a58..a81cb3fcddef 100644 --- a/drivers/pci/rebar.c +++ b/drivers/pci/rebar.c @@ -35,6 +35,18 @@ int pci_rebar_bytes_to_size(u64 bytes) } EXPORT_SYMBOL_GPL(pci_rebar_bytes_to_size); +/** + * pci_rebar_size_to_bytes - Convert encoded BAR Size to size in bytes + * @size: encoded BAR Size as defined in the PCIe spec (0=1MB, 31=128TB) + * + * Return: BAR size in bytes + */ +resource_size_t pci_rebar_size_to_bytes(int size) +{ + return 1ULL << (size + ilog2(PCI_REBAR_MIN_SIZE)); +} +EXPORT_SYMBOL_GPL(pci_rebar_size_to_bytes); + void pci_rebar_init(struct pci_dev *pdev) { pdev->rebar_cap = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_REBAR); diff --git a/include/linux/pci.h b/include/linux/pci.h index 628dda63b9e0..33b27e0c4f3e 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1422,6 +1422,7 @@ int pci_release_resource(struct pci_dev *dev, int resno); /* Resizable BAR related routines */ int pci_rebar_bytes_to_size(u64 bytes); +resource_size_t pci_rebar_size_to_bytes(int size); u32 pci_rebar_get_possible_sizes(struct pci_dev *pdev, int bar); int __must_check pci_resize_resource(struct pci_dev *dev, int i, int size, int exclude_bars); |