drm/amdgpu: add new gttsize module parameter v2

This allows setting the gtt size independent of the gart size.

v2: fix copy and paste typo

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>

1 files changed, 9 insertions, 3 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 4e711d9af67c..b5420b20c2f5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -1097,6 +1097,7 @@ static struct ttm_bo_driver amdgpu_bo_driver = {
 
 int amdgpu_ttm_init(struct amdgpu_device *adev)
 {
+        uint64_t gtt_size;
         int r;
 
         r = amdgpu_ttm_global_init(adev);
@@ -1143,14 +1144,19 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
         }
         DRM_INFO("amdgpu: %uM of VRAM memory ready\n",
                  (unsigned) (adev->mc.real_vram_size / (1024 * 1024)));
-        r = ttm_bo_init_mm(&adev->mman.bdev, TTM_PL_TT,
-                                adev->mc.gart_size >> PAGE_SHIFT);
+
+        if (amdgpu_gtt_size == -1)
+                gtt_size = max((AMDGPU_DEFAULT_GTT_SIZE_MB << 20),
+                               adev->mc.mc_vram_size);
+        else
+                gtt_size = (uint64_t)amdgpu_gtt_size << 20;
+        r = ttm_bo_init_mm(&adev->mman.bdev, TTM_PL_TT, gtt_size >> PAGE_SHIFT);
         if (r) {
                 DRM_ERROR("Failed initializing GTT heap.\n");
                 return r;
         }
         DRM_INFO("amdgpu: %uM of GTT memory ready.\n",
-                 (unsigned)(adev->mc.gart_size / (1024 * 1024)));
+                 (unsigned)(gtt_size / (1024 * 1024)));
 
         adev->gds.mem.total_size = adev->gds.mem.total_size << AMDGPU_GDS_SHIFT;
         adev->gds.mem.gfx_partition_size = adev->gds.mem.gfx_partition_size << AMDGPU_GDS_SHIFT;