PCI: Add pci_resource_is_io() and pci_resource_is_mem() helpers

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

diff --git a/include/linux/pci.h b/include/linux/pci.h
index 2c4454583c115b016e011a847d678a0f5cda0699..e93fbe6b57fe7198aec24cad8038e99d4f850e62 100644 (file)
--- 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