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drm/ttm: switch to per device LRU lock

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Instead of having a global lock for potentially less contention.

Signed-off-by: Christian König <christian.koenig@amd.com>
Tested-by: Nirmoy Das <nirmoy.das@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/424010/
This commit is contained in:
Christian König
2020-10-06 17:26:42 +02:00
parent f9e2a03e11
commit a1f091f8ef
8 changed files with 43 additions and 56 deletions
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8
drivers/gpu/drm/ttm/ttm_execbuf_util.c
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@@ -51,14 +51,12 @@ void ttm_eu_backoff_reservation(struct ww_acquire_ctx *ticket,
if (list_empty(list))
return;
spin_lock(&ttm_glob.lru_lock);
list_for_each_entry(entry, list, head) {
struct ttm_buffer_object *bo = entry->bo;
ttm_bo_move_to_lru_tail(bo, &bo->mem, NULL);
ttm_bo_move_to_lru_tail_unlocked(bo);
dma_resv_unlock(bo->base.resv);
}
spin_unlock(&ttm_glob.lru_lock);
if (ticket)
ww_acquire_fini(ticket);
@@ -154,7 +152,6 @@ void ttm_eu_fence_buffer_objects(struct ww_acquire_ctx *ticket,
if (list_empty(list))
return;
spin_lock(&ttm_glob.lru_lock);
list_for_each_entry(entry, list, head) {
struct ttm_buffer_object *bo = entry->bo;
@@ -162,10 +159,9 @@ void ttm_eu_fence_buffer_objects(struct ww_acquire_ctx *ticket,
dma_resv_add_shared_fence(bo->base.resv, fence);
else
dma_resv_add_excl_fence(bo->base.resv, fence);
ttm_bo_move_to_lru_tail(bo, &bo->mem, NULL);
ttm_bo_move_to_lru_tail_unlocked(bo);
dma_resv_unlock(bo->base.resv);
}
spin_unlock(&ttm_glob.lru_lock);
if (ticket)
ww_acquire_fini(ticket);
}