Implemented a new intersect and compatible callback function
fetching start offset from drm buddy allocator.
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@xxxxxxx>
---
drivers/gpu/drm/i915/i915_ttm_buddy_manager.c | 43 +++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c b/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c
index a5109548abc0..b5801c05bd41 100644
--- a/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c
+++ b/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c
@@ -178,6 +178,47 @@ static void i915_ttm_buddy_man_free(struct ttm_resource_manager *man,
kfree(bman_res);
}
+static bool i915_ttm_buddy_man_intersect(struct ttm_resource_manager *man,
+ struct ttm_resource *res,
+ const struct ttm_place *place,
+ size_t size)
+{
+ struct i915_ttm_buddy_resource *bman_res = to_ttm_buddy_resource(res);
+ u32 start, num_pages = PFN_UP(size);
+ struct drm_buddy_block *block;
+
+ /* Check each drm buddy block individually */
+ list_for_each_entry(block, &bman_res->blocks, link) {
+ start = drm_buddy_block_offset(block) >> PAGE_SHIFT;
+ /* Don't evict BOs outside of the requested placement range */
+ if (place->fpfn >= (start + num_pages) ||
+ (place->lpfn && place->lpfn <= start))
+ return false;
+ }
+
+ return true;
+}
+
+static bool i915_ttm_buddy_man_compatible(struct ttm_resource_manager *man,
+ struct ttm_resource *res,
+ const struct ttm_place *place,
+ size_t size)
+{
+ struct i915_ttm_buddy_resource *bman_res = to_ttm_buddy_resource(res);
+ u32 start, num_pages = PFN_UP(size);
+ struct drm_buddy_block *block;
+
+ /* Check each drm buddy block individually */
+ list_for_each_entry(block, &bman_res->blocks, link) {
+ start = drm_buddy_block_offset(block) >> PAGE_SHIFT;
+ if (start < place->fpfn ||
+ (place->lpfn && (start + num_pages) > place->lpfn))
+ return false;
+ }
+
+ return true;
+}
+
static void i915_ttm_buddy_man_debug(struct ttm_resource_manager *man,
struct drm_printer *printer)
{
@@ -205,6 +246,8 @@ static void i915_ttm_buddy_man_debug(struct ttm_resource_manager *man,
static const struct ttm_resource_manager_func i915_ttm_buddy_manager_func = {
.alloc = i915_ttm_buddy_man_alloc,
.free = i915_ttm_buddy_man_free,
+ .intersect = i915_ttm_buddy_man_intersect,
+ .compatible = i915_ttm_buddy_man_compatible,
.debug = i915_ttm_buddy_man_debug,
};
--
2.25.1
