Arunpravin Paneer Selvam
2022-Jul-25 11:42 UTC
[Nouveau] [PATCH v2 4/6] drm/i915: Implement intersect/compatible functions
Implemented a new intersect and compatible callback function
fetching start offset from drm buddy allocator.
Signed-off-by: Christian K?nig <christian.koenig at amd.com>
Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam at
amd.com>
---
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
Matthew Auld
2022-Jul-26 10:41 UTC
[Nouveau] [PATCH v2 4/6] drm/i915: Implement intersect/compatible functions
On 25/07/2022 12:42, Arunpravin Paneer Selvam wrote:> Implemented a new intersect and compatible callback function > fetching start offset from drm buddy allocator. > > Signed-off-by: Christian K?nig <christian.koenig at amd.com> > Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam at amd.com> > --- > 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; > +}This looks like a nice idea. We should be able to clean up i915_ttm_eviction_valuable() a fair bit I think, if we now call ttm_bo_eviction_valuable() at the end (like in amdgpu), and move the bits that are specific to buddy_man here? So something like: if (!place->fpfn && !place->lpfn) return true; if (!place->fpfn && place->lpfn == i915_buddy_man_visible_size(man)) return bman_res->used_visible_size > 0; /* Check each drm buddy block individually */ ....> + > +static bool i915_ttm_buddy_man_compatible(struct ttm_resource_manager *man, > + struct ttm_resource *res, > + const struct ttm_place *place, > + size_t size)Is it not possible to derive the size from res->num_pages?> +{ > + 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; > + }if (!place->fpfn && !place->lpfn) return true; if (!place->fpfn && place->lpfn == i915_buddy_man_visible_size(man)) return bman_res->used_visible_size == res->num_pages; /* Check each drm buddy block individually */ ...> + > + 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,s/intersect/intersects/ ?> + .compatible = i915_ttm_buddy_man_compatible, > .debug = i915_ttm_buddy_man_debug, > }; >