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| author | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2024-05-07 12:25:21 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2024-05-28 18:14:14 +0200 |
| commit | 2700225304e8e4f0f29f2bbb8ad0c112c9666d90 (patch) | |
| tree | b92b8331c7b6eee8e09ca07efea9f51e4c4a4890 /kernel/resource.c | |
| parent | resource: Handle simple alignment inside __find_resource_space() (diff) | |
| download | linux-2700225304e8e4f0f29f2bbb8ad0c112c9666d90.tar.xz linux-2700225304e8e4f0f29f2bbb8ad0c112c9666d90.zip | |
resource: Export find_resource_space()
PCI bridge window logic needs to find out in advance to the actual
allocation if there is an empty space big enough to fit the window.
Export find_resource_space() for the purpose. Also move the struct
resource_constraint into generic header to be able to use the new
interface.
Link: https://lore.kernel.org/r/20240507102523.57320-7-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 'kernel/resource.c')
| -rw-r--r-- | kernel/resource.c | 26 |
1 files changed, 4 insertions, 22 deletions
diff --git a/kernel/resource.c b/kernel/resource.c index 35c44c23b037..14777afb0a99 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -48,25 +48,6 @@ struct resource iomem_resource = { }; EXPORT_SYMBOL(iomem_resource); -/** - * struct resource_constraint - constraints to be met while searching empty - * resource space - * @min: The minimum address for the memory range - * @max: The maximum address for the memory range - * @align: Alignment for the start address of the empty space - * @alignf: Additional alignment constraints callback - * @alignf_data: Data provided for @alignf callback - * - * Contains the range and alignment constraints that have to be met during - * find_resource_space(). @alignf can be NULL indicating no alignment beyond - * @align is necessary. - */ -struct resource_constraint { - resource_size_t min, max, align; - resource_alignf alignf; - void *alignf_data; -}; - static DEFINE_RWLOCK(resource_lock); static struct resource *next_resource(struct resource *p, bool skip_children) @@ -708,12 +689,13 @@ next: if (!this || this->end == root->end) * * %0 - if successful, @new members start, end, and flags are altered. * * %-EBUSY - if no empty space was found. */ -static int find_resource_space(struct resource *root, struct resource *new, - resource_size_t size, - struct resource_constraint *constraint) +int find_resource_space(struct resource *root, struct resource *new, + resource_size_t size, + struct resource_constraint *constraint) { return __find_resource_space(root, NULL, new, size, constraint); } +EXPORT_SYMBOL_GPL(find_resource_space); /** * reallocate_resource - allocate a slot in the resource tree given range & alignment. |