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PCI: Add pci_resource_is_io() and pci_resource_is_mem() helpers

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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>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://patch.msgid.link/20260508043543.217179-3-kwilczynski@kernel.org
This commit is contained in:
Krzysztof Wilczyński 2026-05-08 04:35:21 +00:00 committed by Bjorn Helgaas
parent d29eac5921
commit 77c5f3def4
1 changed files with 25 additions and 0 deletions
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25
include/linux/pci.h
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@ -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