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| author | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2024-05-07 13:25:19 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2024-05-28 11:14:14 -0500 |
| commit | 4eed3dd7116814c82630b0f1b0f73fa96707134f (patch) | |
| tree | 53f4ea7ce21b0c0adcce386c4a683d82c4144a3a /include/linux/ioport.h | |
| parent | f958625cb4d73556415747de14c6e8076e31254c (diff) | |
| download | linux-next-4eed3dd7116814c82630b0f1b0f73fa96707134f.tar.gz linux-next-4eed3dd7116814c82630b0f1b0f73fa96707134f.zip | |
resource: Use typedef for alignf callback
To make it simpler to declare resource constraint alignf callbacks, add
typedef for it and document it.
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240507102523.57320-5-ilpo.jarvinen@linux.intel.com
Tested-by: Lidong Wang <lidong.wang@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'include/linux/ioport.h')
| -rw-r--r-- | include/linux/ioport.h | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/include/linux/ioport.h b/include/linux/ioport.h index db7fe25f3370..28266426e5bf 100644 --- a/include/linux/ioport.h +++ b/include/linux/ioport.h @@ -188,6 +188,23 @@ enum { #define DEFINE_RES_DMA(_dma) \ DEFINE_RES_DMA_NAMED((_dma), NULL) +/** + * typedef resource_alignf - Resource alignment callback + * @data: Private data used by the callback + * @res: Resource candidate range (an empty resource space) + * @size: The minimum size of the empty space + * @align: Alignment from the constraints + * + * Callback allows calculating resource placement and alignment beyond min, + * max, and align fields in the struct resource_constraint. + * + * Return: Start address for the resource. + */ +typedef resource_size_t (*resource_alignf)(void *data, + const struct resource *res, + resource_size_t size, + resource_size_t align); + /* PC/ISA/whatever - the normal PC address spaces: IO and memory */ extern struct resource ioport_resource; extern struct resource iomem_resource; @@ -207,10 +224,7 @@ extern void arch_remove_reservations(struct resource *avail); extern int allocate_resource(struct resource *root, struct resource *new, resource_size_t size, resource_size_t min, resource_size_t max, resource_size_t align, - resource_size_t (*alignf)(void *, - const struct resource *, - resource_size_t, - resource_size_t), + resource_alignf alignf, void *alignf_data); struct resource *lookup_resource(struct resource *root, resource_size_t start); int adjust_resource(struct resource *res, resource_size_t start, |