From: Christian König <christian.koenig@xxxxxxx>
We want to use them as remap address space.
Signed-off-by: Christian König <christian.koenig at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c | 5 ++++-
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 3 +++
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
index 6fdf83a..a0976dc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
@@ -43,12 +43,15 @@ static int amdgpu_gtt_mgr_init(struct ttm_mem_type_manager *man,
unsigned long p_size)
{
struct amdgpu_gtt_mgr *mgr;
+ uint64_t start, size;
mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
if (!mgr)
return -ENOMEM;
- drm_mm_init(&mgr->mm, 0, p_size);
+ start = AMDGPU_GTT_MAX_TRANSFER_SIZE * AMDGPU_GTT_NUM_TRANSFER_WINDOWS;
+ size = p_size - start;
+ drm_mm_init(&mgr->mm, start, size);
spin_lock_init(&mgr->lock);
mgr->available = p_size;
man->priv = mgr;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
index 2ade5c5..9c4da0a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
@@ -34,6 +34,9 @@
#define AMDGPU_PL_FLAG_GWS (TTM_PL_FLAG_PRIV << 1)
#define AMDGPU_PL_FLAG_OA (TTM_PL_FLAG_PRIV << 2)
+#define AMDGPU_GTT_MAX_TRANSFER_SIZE 512
+#define AMDGPU_GTT_NUM_TRANSFER_WINDOWS 2
+
struct amdgpu_mman {
struct ttm_bo_global_ref bo_global_ref;
struct drm_global_reference mem_global_ref;
--
2.7.4
