[PATCH 05/12] drm/amdgpu: bind BOs to TTM only once

[Christian König]

From: Christian König <christian.koenig at amd.com>

No need to do this on every round.

Signed-off-by: Christian König <christian.koenig at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 70 ++++++++++++++-------------------
 1 file changed, 29 insertions(+), 41 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index bbe1639..5bfe7f6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -252,29 +252,15 @@ static void amdgpu_move_null(struct ttm_buffer_object *bo,
 	new_mem->mm_node = NULL;
 }
 
-static int amdgpu_mm_node_addr(struct ttm_buffer_object *bo,
-			       struct drm_mm_node *mm_node,
-			       struct ttm_mem_reg *mem,
-			       uint64_t *addr)
+static uint64_t amdgpu_mm_node_addr(struct ttm_buffer_object *bo,
+				    struct drm_mm_node *mm_node,
+				    struct ttm_mem_reg *mem)
 {
-	int r;
-
-	switch (mem->mem_type) {
-	case TTM_PL_TT:
-		r = amdgpu_ttm_bind(bo, mem);
-		if (r)
-			return r;
-
-	case TTM_PL_VRAM:
-		*addr = mm_node->start << PAGE_SHIFT;
-		*addr += bo->bdev->man[mem->mem_type].gpu_offset;
-		break;
-	default:
-		DRM_ERROR("Unknown placement %d\n", mem->mem_type);
-		return -EINVAL;
-	}
+	uint64_t addr;
 
-	return 0;
+	addr = mm_node->start << PAGE_SHIFT;
+	addr += bo->bdev->man[mem->mem_type].gpu_offset;
+	return addr;
 }
 
 static int amdgpu_move_blit(struct ttm_buffer_object *bo,
@@ -298,18 +284,25 @@ static int amdgpu_move_blit(struct ttm_buffer_object *bo,
 		return -EINVAL;
 	}
 
+	if (old_mem->mem_type == TTM_PL_TT) {
+		r = amdgpu_ttm_bind(bo, old_mem);
+		if (r)
+			return r;
+	}
+
 	old_mm = old_mem->mm_node;
-	r = amdgpu_mm_node_addr(bo, old_mm, old_mem, &old_start);
-	if (r)
-		return r;
 	old_size = old_mm->size;
+	old_start = amdgpu_mm_node_addr(bo, old_mm, old_mem);
 
+	if (new_mem->mem_type == TTM_PL_TT) {
+		r = amdgpu_ttm_bind(bo, new_mem);
+		if (r)
+			return r;
+	}
 
 	new_mm = new_mem->mm_node;
-	r = amdgpu_mm_node_addr(bo, new_mm, new_mem, &new_start);
-	if (r)
-		return r;
 	new_size = new_mm->size;
+	new_start = amdgpu_mm_node_addr(bo, new_mm, new_mem);
 
 	num_pages = new_mem->num_pages;
 	while (num_pages) {
@@ -331,10 +324,7 @@ static int amdgpu_move_blit(struct ttm_buffer_object *bo,
 
 		old_size -= cur_pages;
 		if (!old_size) {
-			r = amdgpu_mm_node_addr(bo, ++old_mm, old_mem,
-						&old_start);
-			if (r)
-				goto error;
+			old_start = amdgpu_mm_node_addr(bo, ++old_mm, old_mem);
 			old_size = old_mm->size;
 		} else {
 			old_start += cur_pages * PAGE_SIZE;
@@ -342,11 +332,7 @@ static int amdgpu_move_blit(struct ttm_buffer_object *bo,
 
 		new_size -= cur_pages;
 		if (!new_size) {
-			r = amdgpu_mm_node_addr(bo, ++new_mm, new_mem,
-						&new_start);
-			if (r)
-				goto error;
-
+			new_start = amdgpu_mm_node_addr(bo, ++new_mm, new_mem);
 			new_size = new_mm->size;
 		} else {
 			new_start += cur_pages * PAGE_SIZE;
@@ -1347,6 +1333,12 @@ int amdgpu_fill_buffer(struct amdgpu_bo *bo,
 		return -EINVAL;
 	}
 
+	if (bo->tbo.mem.mem_type == TTM_PL_TT) {
+		r = amdgpu_ttm_bind(&bo->tbo, &bo->tbo.mem);
+		if (r)
+			return r;
+	}
+
 	num_pages = bo->tbo.num_pages;
 	mm_node = bo->tbo.mem.mm_node;
 	num_loops = 0;
@@ -1382,11 +1374,7 @@ int amdgpu_fill_buffer(struct amdgpu_bo *bo,
 		uint32_t byte_count = mm_node->size << PAGE_SHIFT;
 		uint64_t dst_addr;
 
-		r = amdgpu_mm_node_addr(&bo->tbo, mm_node,
-					&bo->tbo.mem, &dst_addr);
-		if (r)
-			return r;
-
+		dst_addr = amdgpu_mm_node_addr(&bo->tbo, mm_node, &bo->tbo.mem);
 		while (byte_count) {
 			uint32_t cur_size_in_bytes = min(byte_count, max_bytes);
 
-- 
2.7.4