[PATCH v8 02/25] PCI: Add pci_resource_is_io() and pci_resource_is_mem() helpers
From: Krzysztof Wilczyński <kwilczynski@kernel.org>
Date: 2026-06-19 08:52:12
Also in:
linux-alpha, linux-pci
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
Add helpers to check whether a PCI resource is of I/O port or memory type. These replace the open-coded pci_resource_flags() with IORESOURCE_IO and IORESOURCE_MEM pattern used across the tree. Suggested-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Tested-by: Shivaprasad G Bhat <redacted> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org> --- include/linux/pci.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+)
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 2c4454583c11..e93fbe6b57fe 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h@@ -2300,6 +2300,31 @@ int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma); CONCATENATE(__pci_dev_for_each_res, COUNT_ARGS(__VA_ARGS__)) \ (dev, res, __VA_ARGS__) +/** + * pci_resource_is_io - check if a PCI resource is of I/O port type. + * @dev: PCI device to check. + * @resno: The resource number (BAR index) to check. + * + * Returns true if the resource type is I/O port. + */ +static inline bool pci_resource_is_io(const struct pci_dev *dev, int resno) +{ + return resource_type(pci_resource_n(dev, resno)) == IORESOURCE_IO; +} + +/** + * pci_resource_is_mem - check if a PCI resource is of memory type. + * @dev: PCI device to check. + * @resno: The resource number (BAR index) to check. + * + * Returns true if the resource type is memory, including + * prefetchable memory. + */ +static inline bool pci_resource_is_mem(const struct pci_dev *dev, int resno) +{ + return resource_type(pci_resource_n(dev, resno)) == IORESOURCE_MEM; +} + /* * Similar to the helpers above, these manipulate per-pci_dev * driver-specific data. They are really just a wrapper around
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2.54.0