From: Chunming Zhou <David1.Zhou@amd.com>
Date: Mon, 27 Mar 2017 03:53:12 +0000 (+0800)
Subject: drm/amdgpu: adapt vm size for multi vmpt
X-Git-Tag: v4.12~21^2~26^2~43
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=36f8c1f9037b0a05738ad479320c398f7a4642c1;p=platform%2Fkernel%2Flinux-exynos.git

drm/amdgpu: adapt vm size for multi vmpt

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index 5b4eb7a..ab090fc 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -500,6 +500,12 @@ static int gmc_v9_0_vm_init(struct amdgpu_device *adev)
 	 * amdkfd will use VMIDs 8-15
 	 */
 	adev->vm_manager.num_ids = AMDGPU_NUM_OF_VMIDS;
+	/* Because of four level VMPTs, vm size at least is 256GB.
+	256TB is OK as well */
+	if (amdgpu_vm_size < 256) {
+		DRM_WARN("vm size at least is 256GB!\n");
+		amdgpu_vm_size = 256;
+	}
 	adev->vm_manager.num_level = 1;
 	amdgpu_vm_manager_init(adev);