[PATCH v5 16/23] alpha/PCI: Add static PCI resource attribute macros

Krzysztof Wilczyński
2026-04-16T18:02:08Z

Add macros for declaring static binary attributes for Alpha's PCI
resource files:

- pci_dev_resource_attr(), for dense/BWX systems (mmap dense)
- pci_dev_resource_sparse_attr(), for sparse systems (mmap sparse)
- pci_dev_resource_dense_attr(), for dense companion files (mmap dense)

Each macro creates a const bin_attribute with the BAR index stored in
the .private property and the appropriate .mmap callback.

Tested-by: Magnus Lindholm <linmag7@gmail.com>
Acked-by: Magnus Lindholm <linmag7@gmail.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
---
arch/alpha/kernel/pci-sysfs.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)

diff --git a/arch/alpha/kernel/pci-sysfs.c b/arch/alpha/kernel/pci-sysfs.c
index f2ee737c588c..3108c165b3d8 100644
--- a/arch/alpha/kernel/pci-sysfs.c
+++ b/arch/alpha/kernel/pci-sysfs.c
@@ -104,6 +104,26 @@ static int pci_mmap_resource_dense(struct file *filp, struct kobject *kobj,
return pci_mmap_resource(kobj, attr, vma, 0);
}

+#define __pci_dev_resource_attr(_bar, _name, _suffix, _mmap) \
+static const struct bin_attribute \
+pci_dev_resource##_bar##_suffix##_attr = { \
+ .attr = { .name = __stringify(_name), .mode = 0600 }, \
+ .private = (void *)(unsigned long)(_bar), \
+ .mmap = (_mmap), \
+}
+
+#define pci_dev_resource_attr(_bar) \
+ __pci_dev_resource_attr(_bar, resource##_bar,, \
+ pci_mmap_resource_dense)
+
+#define pci_dev_resource_sparse_attr(_bar) \
+ __pci_dev_resource_attr(_bar, resource##_bar##_sparse, _sparse, \
+ pci_mmap_resource_sparse)
+
+#define pci_dev_resource_dense_attr(_bar) \
+ __pci_dev_resource_attr(_bar, resource##_bar##_dense, _dense, \
+ pci_mmap_resource_dense)
+
/**
* pci_remove_resource_files - cleanup resource files
* @pdev: pci_dev to cleanup
--
2.53.0