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drm/amdgpu: reserve the first 2x512 pages of GART 

We want to use them as remap address space.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
hifive-unleashed-5.1
Christian König 2017-06-28 12:18:54 +02:00 committed by Alex Deucher
parent 606ce3c098
commit cc25188afd
2 changed files with 7 additions and 1 deletions
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5
drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
View File

@ -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;

3
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
View File

@ -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;