[PATCH 04/10] drm/ttm: cleanup ttm_bo_mem_space
Christian König
ckoenig.leichtzumerken at gmail.com
Wed May 29 12:26:56 UTC 2019
We tried this once before, but that turned out to be more
complicated than thought. With all the right prerequisites
it looks like we can do this now.
Signed-off-by: Christian König <christian.koenig at amd.com>
---
drivers/gpu/drm/ttm/ttm_bo.c | 127 ++++++++++++++++++-----------------
1 file changed, 66 insertions(+), 61 deletions(-)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 702cd89adbf9..0dbb23b0dedd 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -893,13 +893,12 @@ static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
* space, or we've evicted everything and there isn't enough space.
*/
static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
- uint32_t mem_type,
- const struct ttm_place *place,
- struct ttm_mem_reg *mem,
- struct ttm_operation_ctx *ctx)
+ const struct ttm_place *place,
+ struct ttm_mem_reg *mem,
+ struct ttm_operation_ctx *ctx)
{
struct ttm_bo_device *bdev = bo->bdev;
- struct ttm_mem_type_manager *man = &bdev->man[mem_type];
+ struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
int ret;
do {
@@ -908,11 +907,11 @@ static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
return ret;
if (mem->mm_node)
break;
- ret = ttm_mem_evict_first(bdev, mem_type, place, ctx);
+ ret = ttm_mem_evict_first(bdev, mem->mem_type, place, ctx);
if (unlikely(ret != 0))
return ret;
} while (1);
- mem->mem_type = mem_type;
+
return ttm_bo_add_move_fence(bo, man, mem);
}
@@ -960,6 +959,51 @@ static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man,
return true;
}
+/**
+ * ttm_bo_mem_placement - check if placement is compatible
+ * @bo: BO to find memory for
+ * @place: where to search
+ * @mem: the memory object to fill in
+ * @ctx: operation context
+ *
+ * Check if placement is compatible and fill in mem structure.
+ * Returns -EBUSY if placement won't work or negative error code.
+ * 0 when placement can be used.
+ */
+static int ttm_bo_mem_placement(struct ttm_buffer_object *bo,
+ const struct ttm_place *place,
+ struct ttm_mem_reg *mem,
+ struct ttm_operation_ctx *ctx)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ uint32_t mem_type = TTM_PL_SYSTEM;
+ struct ttm_mem_type_manager *man;
+ uint32_t cur_flags = 0;
+ int ret;
+
+ ret = ttm_mem_type_from_place(place, &mem_type);
+ if (ret)
+ return ret;
+
+ man = &bdev->man[mem_type];
+ if (!man->has_type || !man->use_type)
+ return -EBUSY;
+
+ if (!ttm_bo_mt_compatible(man, mem_type, place, &cur_flags))
+ return -EBUSY;
+
+ cur_flags = ttm_bo_select_caching(man, bo->mem.placement, cur_flags);
+ /*
+ * Use the access and other non-mapping-related flag bits from
+ * the memory placement flags to the current flags
+ */
+ ttm_flag_masked(&cur_flags, place->flags, ~TTM_PL_MASK_MEMTYPE);
+
+ mem->mem_type = mem_type;
+ mem->placement = cur_flags;
+ return 0;
+}
+
/**
* Creates space for memory region @mem according to its type.
*
@@ -974,11 +1018,7 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
struct ttm_operation_ctx *ctx)
{
struct ttm_bo_device *bdev = bo->bdev;
- struct ttm_mem_type_manager *man;
- uint32_t mem_type = TTM_PL_SYSTEM;
- uint32_t cur_flags = 0;
bool type_found = false;
- bool type_ok = false;
int i, ret;
ret = reservation_object_reserve_shared(bo->resv, 1);
@@ -988,37 +1028,20 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
mem->mm_node = NULL;
for (i = 0; i < placement->num_placement; ++i) {
const struct ttm_place *place = &placement->placement[i];
+ struct ttm_mem_type_manager *man;
- ret = ttm_mem_type_from_place(place, &mem_type);
+ ret = ttm_bo_mem_placement(bo, place, mem, ctx);
+ if (ret == -EBUSY)
+ continue;
if (ret)
return ret;
- man = &bdev->man[mem_type];
- if (!man->has_type || !man->use_type)
- continue;
-
- type_ok = ttm_bo_mt_compatible(man, mem_type, place,
- &cur_flags);
-
- if (!type_ok)
- continue;
type_found = true;
- cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
- cur_flags);
- /*
- * Use the access and other non-mapping-related flag bits from
- * the memory placement flags to the current flags
- */
- ttm_flag_masked(&cur_flags, place->flags,
- ~TTM_PL_MASK_MEMTYPE);
-
- if (mem_type == TTM_PL_SYSTEM) {
- mem->mem_type = mem_type;
- mem->placement = cur_flags;
- mem->mm_node = NULL;
+ mem->mm_node = NULL;
+ if (mem->mem_type == TTM_PL_SYSTEM)
return 0;
- }
+ man = &bdev->man[mem->mem_type];
ret = (*man->func->get_node)(man, bo, place, mem);
if (unlikely(ret))
return ret;
@@ -1029,8 +1052,6 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
(*man->func->put_node)(man, mem);
return ret;
}
- mem->mem_type = mem_type;
- mem->placement = cur_flags;
return 0;
}
}
@@ -1038,37 +1059,21 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
for (i = 0; i < placement->num_busy_placement; ++i) {
const struct ttm_place *place = &placement->busy_placement[i];
- ret = ttm_mem_type_from_place(place, &mem_type);
+ ret = ttm_bo_mem_placement(bo, place, mem, ctx);
+ if (ret == -EBUSY)
+ continue;
if (ret)
return ret;
- man = &bdev->man[mem_type];
- if (!man->has_type || !man->use_type)
- continue;
- if (!ttm_bo_mt_compatible(man, mem_type, place, &cur_flags))
- continue;
type_found = true;
- cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
- cur_flags);
- /*
- * Use the access and other non-mapping-related flag bits from
- * the memory placement flags to the current flags
- */
- ttm_flag_masked(&cur_flags, place->flags,
- ~TTM_PL_MASK_MEMTYPE);
-
- if (mem_type == TTM_PL_SYSTEM) {
- mem->mem_type = mem_type;
- mem->placement = cur_flags;
- mem->mm_node = NULL;
+ mem->mm_node = NULL;
+ if (mem->mem_type == TTM_PL_SYSTEM)
return 0;
- }
- ret = ttm_bo_mem_force_space(bo, mem_type, place, mem, ctx);
- if (ret == 0 && mem->mm_node) {
- mem->placement = cur_flags;
+ ret = ttm_bo_mem_force_space(bo, place, mem, ctx);
+ if (ret == 0 && mem->mm_node)
return 0;
- }
+
if (ret && ret != -EBUSY)
return ret;
}
--
2.17.1
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