From: Aric Cyr <aric.cyr@xxxxxxx>
[Why]
DCValidator is created/destroyed repeatedly for cofunctional validation
which causes a lot of memory thrashing, particularly when Driver Verifer
is enabled.
[How]
Implement a basic caching algorithm that will cache DCValidator with a
matching topology. When a match is found, the DCValidator can be
reused. If there is no match, a new one will be created and inserted
into the cache if there is space or an unreference entry can be evicted.
Signed-off-by: Aric Cyr <aric.cyr@xxxxxxx>
Acked-by: Aurabindo Pillai <aurabindo.pillai@xxxxxxx>
---
drivers/gpu/drm/amd/display/dc/core/dc.c | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 511ab25b3f1a..ce5303c76b11 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1481,13 +1481,8 @@ bool dc_post_update_surfaces_to_stream(struct dc *dc)
return true;
}
-struct dc_state *dc_create_state(struct dc *dc)
+static void init_state(struct dc *dc, struct dc_state *context)
{
- struct dc_state *context = kvzalloc(sizeof(struct dc_state),
- GFP_KERNEL);
-
- if (!context)
- return NULL;
/* Each context must have their own instance of VBA and in order to
* initialize and obtain IP and SOC the base DML instance from DC is
* initially copied into every context
@@ -1495,6 +1490,17 @@ struct dc_state *dc_create_state(struct dc *dc)
#ifdef CONFIG_DRM_AMD_DC_DCN
memcpy(&context->bw_ctx.dml, &dc->dml, sizeof(struct display_mode_lib));
#endif
+}
+
+struct dc_state *dc_create_state(struct dc *dc)
+{
+ struct dc_state *context = kzalloc(sizeof(struct dc_state),
+ GFP_KERNEL);
+
+ if (!context)
+ return NULL;
+
+ init_state(dc, context);
kref_init(&context->refcount);
--
2.25.1
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