[PATCH v2] drm/amdgpu: add print for iommu translation mode

[Graham Sider]

Add log to display whether RAM is direct vs DMA mapped.

Signed-off-by: Graham Sider <graham.si...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 3bd6c5aef796..83774824694b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -3528,8 +3528,12 @@ static void amdgpu_device_check_iommu_direct_map(struct 
amdgpu_device *adev)
        struct iommu_domain *domain;
 
        domain = iommu_get_domain_for_dev(adev->dev);
-       if (!domain || domain->type == IOMMU_DOMAIN_IDENTITY)
+       if (!domain || domain->type == IOMMU_DOMAIN_IDENTITY) {
+               dev_info(adev->dev, "RAM is direct mapped to GPU (not 
translated by IOMMU)\n");
                adev->ram_is_direct_mapped = true;
+       } else {
+               dev_info(adev->dev, "RAM is DMA mapped to GPU (translated by 
IOMMU)\n");
+       }
 }
 
 static const struct attribute *amdgpu_dev_attributes[] = {
-- 
2.25.1