drm/amdgpu: expose the VA above the hole to userspace

Let userspace know how much area we have above the 48bit VA hole on
Vega10.

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, 10 insertions, 2 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index 2614269c4d7f..3222e1d4636c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -550,6 +550,7 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file
         }
         case AMDGPU_INFO_DEV_INFO: {
                 struct drm_amdgpu_info_device dev_info = {};
+                uint64_t vm_size;
 
                 dev_info.device_id = dev->pdev->device;
                 dev_info.chip_rev = adev->rev_id;
@@ -577,10 +578,17 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file
                         dev_info.ids_flags |= AMDGPU_IDS_FLAGS_FUSION;
                 if (amdgpu_sriov_vf(adev))
                         dev_info.ids_flags |= AMDGPU_IDS_FLAGS_PREEMPTION;
+
+                vm_size = adev->vm_manager.max_pfn * AMDGPU_GPU_PAGE_SIZE;
                 dev_info.virtual_address_offset = AMDGPU_VA_RESERVED_SIZE;
                 dev_info.virtual_address_max =
-                        min(adev->vm_manager.max_pfn * AMDGPU_GPU_PAGE_SIZE,
-                            AMDGPU_VA_HOLE_START);
+                        min(vm_size, AMDGPU_VA_HOLE_START);
+
+                vm_size -= AMDGPU_VA_RESERVED_SIZE;
+                if (vm_size > AMDGPU_VA_HOLE_START) {
+                        dev_info.high_va_offset = AMDGPU_VA_HOLE_END;
+                        dev_info.high_va_max = AMDGPU_VA_HOLE_END | vm_size;
+                }
                 dev_info.virtual_address_alignment = max((int)PAGE_SIZE, AMDGPU_GPU_PAGE_SIZE);
                 dev_info.pte_fragment_size = (1 << adev->vm_manager.fragment_size) * AMDGPU_GPU_PAGE_SIZE;
                 dev_info.gart_page_size = AMDGPU_GPU_PAGE_SIZE;