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drm/ttm: cleanup and optimize ttm_bo_mem_compat v2 

No need to implement the same logic twice. Also check if the busy placements
are identical to the already scanned placements before checking them.

v2: improve check even more as suggested by Michel.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
hifive-unleashed-5.1
Christian König 2017-03-29 11:47:04 +02:00 committed by Alex Deucher
parent 76e15e029b
commit 018b7fc3a9
1 changed files with 31 additions and 26 deletions
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57
drivers/gpu/drm/ttm/ttm_bo.c
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@ -1020,37 +1020,42 @@ out_unlock:
return ret;
}
static bool ttm_bo_places_compat(const struct ttm_place *places,
unsigned num_placement,
struct ttm_mem_reg *mem,
uint32_t *new_flags)
{
unsigned i;
for (i = 0; i < num_placement; i++) {
const struct ttm_place *heap = &places[i];
if (mem->mm_node && (mem->start < heap->fpfn ||
(heap->lpfn != 0 && (mem->start + mem->num_pages) > heap->lpfn)))
continue;
*new_flags = heap->flags;
if ((*new_flags & mem->placement & TTM_PL_MASK_CACHING) &&
(*new_flags & mem->placement & TTM_PL_MASK_MEM))
return true;
}
return false;
}
bool ttm_bo_mem_compat(struct ttm_placement *placement,
struct ttm_mem_reg *mem,
uint32_t *new_flags)
{
int i;
if (ttm_bo_places_compat(placement->placement, placement->num_placement,
mem, new_flags))
return true;
for (i = 0; i < placement->num_placement; i++) {
const struct ttm_place *heap = &placement->placement[i];
if (mem->mm_node &&
(mem->start < heap->fpfn ||
(heap->lpfn != 0 && (mem->start + mem->num_pages) > heap->lpfn)))
continue;
*new_flags = heap->flags;
if ((*new_flags & mem->placement & TTM_PL_MASK_CACHING) &&
(*new_flags & mem->placement & TTM_PL_MASK_MEM))
return true;
}
for (i = 0; i < placement->num_busy_placement; i++) {
const struct ttm_place *heap = &placement->busy_placement[i];
if (mem->mm_node &&
(mem->start < heap->fpfn ||
(heap->lpfn != 0 && (mem->start + mem->num_pages) > heap->lpfn)))
continue;
*new_flags = heap->flags;
if ((*new_flags & mem->placement & TTM_PL_MASK_CACHING) &&
(*new_flags & mem->placement & TTM_PL_MASK_MEM))
return true;
}
if ((placement->busy_placement != placement->placement ||
placement->num_busy_placement > placement->num_placement) &&
ttm_bo_places_compat(placement->busy_placement,
placement->num_busy_placement,
mem, new_flags))
return true;
return false;
}