[PATCH v6 1/6] drm/ttm: Add new callbacks to ttm res mgr
Christian König
christian.koenig at amd.com
Mon Aug 15 11:05:08 UTC 2022
Am 12.08.22 um 15:30 schrieb Arunpravin Paneer Selvam:
> We are adding two new callbacks to ttm resource manager
> function to handle intersection and compatibility of
> placement and resources.
>
> v2: move the amdgpu and ttm_range_manager changes to
> separate patches (Christian)
> v3: rename "intersect" to "intersects" (Matthew)
> v4: move !place check to the !res if and return false
> in ttm_resource_compatible() function (Christian)
> v5: move bits of code from patch number 6 to avoid
> temporary driver breakup (Christian)
>
> Signed-off-by: Christian König <christian.koenig at amd.com>
> Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam at amd.com>
Patch #6 could still be cleaned up more now that we have the workaround
code in patch #1, but that not really a must have.
Reviewed-by: Christian König <christian.koenig at amd.com> for the entire
series.
Do you already have commit rights?
Regards,
Christian.
> ---
> drivers/gpu/drm/ttm/ttm_bo.c | 9 ++--
> drivers/gpu/drm/ttm/ttm_resource.c | 77 +++++++++++++++++++++++++++++-
> include/drm/ttm/ttm_resource.h | 40 ++++++++++++++++
> 3 files changed, 119 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> index c1bd006a5525..f066e8124c50 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -518,6 +518,9 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo,
> bool ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
> const struct ttm_place *place)
> {
> + struct ttm_resource *res = bo->resource;
> + struct ttm_device *bdev = bo->bdev;
> +
> dma_resv_assert_held(bo->base.resv);
> if (bo->resource->mem_type == TTM_PL_SYSTEM)
> return true;
> @@ -525,11 +528,7 @@ bool ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
> /* Don't evict this BO if it's outside of the
> * requested placement range
> */
> - if (place->fpfn >= (bo->resource->start + bo->resource->num_pages) ||
> - (place->lpfn && place->lpfn <= bo->resource->start))
> - return false;
> -
> - return true;
> + return ttm_resource_intersects(bdev, res, place, bo->base.size);
> }
> EXPORT_SYMBOL(ttm_bo_eviction_valuable);
>
> diff --git a/drivers/gpu/drm/ttm/ttm_resource.c b/drivers/gpu/drm/ttm/ttm_resource.c
> index 20f9adcc3235..0d1f862a582b 100644
> --- a/drivers/gpu/drm/ttm/ttm_resource.c
> +++ b/drivers/gpu/drm/ttm/ttm_resource.c
> @@ -253,10 +253,84 @@ void ttm_resource_free(struct ttm_buffer_object *bo, struct ttm_resource **res)
> }
> EXPORT_SYMBOL(ttm_resource_free);
>
> +/**
> + * ttm_resource_intersects - test for intersection
> + *
> + * @bdev: TTM device structure
> + * @res: The resource to test
> + * @place: The placement to test
> + * @size: How many bytes the new allocation needs.
> + *
> + * Test if @res intersects with @place and @size. Used for testing if evictions
> + * are valueable or not.
> + *
> + * Returns true if the res placement intersects with @place and @size.
> + */
> +bool ttm_resource_intersects(struct ttm_device *bdev,
> + struct ttm_resource *res,
> + const struct ttm_place *place,
> + size_t size)
> +{
> + struct ttm_resource_manager *man;
> +
> + if (!res)
> + return false;
> +
> + if (!place)
> + return true;
> +
> + man = ttm_manager_type(bdev, res->mem_type);
> + if (!man->func->intersects) {
> + if (place->fpfn >= (res->start + res->num_pages) ||
> + (place->lpfn && place->lpfn <= res->start))
> + return false;
> +
> + return true;
> + }
> +
> + return man->func->intersects(man, res, place, size);
> +}
> +
> +/**
> + * ttm_resource_compatible - test for compatibility
> + *
> + * @bdev: TTM device structure
> + * @res: The resource to test
> + * @place: The placement to test
> + * @size: How many bytes the new allocation needs.
> + *
> + * Test if @res compatible with @place and @size.
> + *
> + * Returns true if the res placement compatible with @place and @size.
> + */
> +bool ttm_resource_compatible(struct ttm_device *bdev,
> + struct ttm_resource *res,
> + const struct ttm_place *place,
> + size_t size)
> +{
> + struct ttm_resource_manager *man;
> +
> + if (!res || !place)
> + return false;
> +
> + man = ttm_manager_type(bdev, res->mem_type);
> + if (!man->func->compatible) {
> + if (res->start < place->fpfn ||
> + (place->lpfn && (res->start + res->num_pages) > place->lpfn))
> + return false;
> +
> + return true;
> + }
> +
> + return man->func->compatible(man, res, place, size);
> +}
> +
> static bool ttm_resource_places_compat(struct ttm_resource *res,
> const struct ttm_place *places,
> unsigned num_placement)
> {
> + struct ttm_buffer_object *bo = res->bo;
> + struct ttm_device *bdev = bo->bdev;
> unsigned i;
>
> if (res->placement & TTM_PL_FLAG_TEMPORARY)
> @@ -265,8 +339,7 @@ static bool ttm_resource_places_compat(struct ttm_resource *res,
> for (i = 0; i < num_placement; i++) {
> const struct ttm_place *heap = &places[i];
>
> - if (res->start < heap->fpfn || (heap->lpfn &&
> - (res->start + res->num_pages) > heap->lpfn))
> + if (!ttm_resource_compatible(bdev, res, heap, bo->base.size))
> continue;
>
> if ((res->mem_type == heap->mem_type) &&
> diff --git a/include/drm/ttm/ttm_resource.h b/include/drm/ttm/ttm_resource.h
> index ca89a48c2460..5afc6d664fde 100644
> --- a/include/drm/ttm/ttm_resource.h
> +++ b/include/drm/ttm/ttm_resource.h
> @@ -88,6 +88,38 @@ struct ttm_resource_manager_func {
> void (*free)(struct ttm_resource_manager *man,
> struct ttm_resource *res);
>
> + /**
> + * struct ttm_resource_manager_func member intersects
> + *
> + * @man: Pointer to a memory type manager.
> + * @res: Pointer to a struct ttm_resource to be checked.
> + * @place: Placement to check against.
> + * @size: Size of the check.
> + *
> + * Test if @res intersects with @place + @size. Used to judge if
> + * evictions are valueable or not.
> + */
> + bool (*intersects)(struct ttm_resource_manager *man,
> + struct ttm_resource *res,
> + const struct ttm_place *place,
> + size_t size);
> +
> + /**
> + * struct ttm_resource_manager_func member compatible
> + *
> + * @man: Pointer to a memory type manager.
> + * @res: Pointer to a struct ttm_resource to be checked.
> + * @place: Placement to check against.
> + * @size: Size of the check.
> + *
> + * Test if @res compatible with @place + @size. Used to check of
> + * the need to move the backing store or not.
> + */
> + bool (*compatible)(struct ttm_resource_manager *man,
> + struct ttm_resource *res,
> + const struct ttm_place *place,
> + size_t size);
> +
> /**
> * struct ttm_resource_manager_func member debug
> *
> @@ -329,6 +361,14 @@ int ttm_resource_alloc(struct ttm_buffer_object *bo,
> const struct ttm_place *place,
> struct ttm_resource **res);
> void ttm_resource_free(struct ttm_buffer_object *bo, struct ttm_resource **res);
> +bool ttm_resource_intersects(struct ttm_device *bdev,
> + struct ttm_resource *res,
> + const struct ttm_place *place,
> + size_t size);
> +bool ttm_resource_compatible(struct ttm_device *bdev,
> + struct ttm_resource *res,
> + const struct ttm_place *place,
> + size_t size);
> bool ttm_resource_compat(struct ttm_resource *res,
> struct ttm_placement *placement);
> void ttm_resource_set_bo(struct ttm_resource *res,
>
> base-commit: 730c2bf4ad395acf0aa0820535fdb8ea6abe5df1
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