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drm/ttm: add the infrastructure for pipelined evictions

Telusuri Sumber 
Free up the memory immediately, remember the last eviction for each domain and
make new allocations depend on the last eviction to be completed.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König
2016-06-15 13:44:03 +02:00
committed by Alex Deucher
orang tua f849c6d652
melakukan 3ddf4ad917
3 mengubah file dengan 160 tambahan dan 5 penghapusan
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49
drivers/gpu/drm/ttm/ttm_bo.c
Melihat File

@@ -787,6 +787,34 @@ void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem)
}
EXPORT_SYMBOL(ttm_bo_mem_put);
/**
* Add the last move fence to the BO and reserve a new shared slot.
*/
static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
struct ttm_mem_type_manager *man,
struct ttm_mem_reg *mem)
{
struct fence *fence;
int ret;
spin_lock(&man->move_lock);
fence = fence_get(man->move);
spin_unlock(&man->move_lock);
if (fence) {
reservation_object_add_shared_fence(bo->resv, fence);
ret = reservation_object_reserve_shared(bo->resv);
if (unlikely(ret))
return ret;
fence_put(bo->moving);
bo->moving = fence;
}
return 0;
}
/**
* Repeatedly evict memory from the LRU for @mem_type until we create enough
* space, or we've evicted everything and there isn't enough space.
@@ -813,10 +841,8 @@ static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
if (unlikely(ret != 0))
return ret;
} while (1);
if (mem->mm_node == NULL)
return -ENOMEM;
mem->mem_type = mem_type;
return 0;
return ttm_bo_add_move_fence(bo, man, mem);
}
static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man,
@@ -886,6 +912,10 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
bool has_erestartsys = false;
int i, ret;
ret = reservation_object_reserve_shared(bo->resv);
if (unlikely(ret))
return ret;
mem->mm_node = NULL;
for (i = 0; i < placement->num_placement; ++i) {
const struct ttm_place *place = &placement->placement[i];
@@ -919,9 +949,15 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
ret = (*man->func->get_node)(man, bo, place, mem);
if (unlikely(ret))
return ret;
if (mem->mm_node)
if (mem->mm_node) {
ret = ttm_bo_add_move_fence(bo, man, mem);
if (unlikely(ret)) {
(*man->func->put_node)(man, mem);
return ret;
}
break;
}
}
if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) {
@@ -1290,6 +1326,7 @@ int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type)
mem_type);
return ret;
}
fence_put(man->move);
man->use_type = false;
man->has_type = false;
@@ -1335,6 +1372,7 @@ int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
man->io_reserve_fastpath = true;
man->use_io_reserve_lru = false;
mutex_init(&man->io_reserve_mutex);
spin_lock_init(&man->move_lock);
INIT_LIST_HEAD(&man->io_reserve_lru);
ret = bdev->driver->init_mem_type(bdev, type, man);
@@ -1353,6 +1391,7 @@ int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
man->size = p_size;
INIT_LIST_HEAD(&man->lru);
man->move = NULL;
return 0;
}