[RFC PATCH 17/18] drm/amdgpu: Implement EVICTED_VRAM query

[Friedrich Vock]

Used by userspace to gauge the severity of memory overcommit and make
prioritization decisions based on it.

Used by userspace to gauge the severity of memory overcommit and make
prioritization decisions based on it.

Signed-off-by: Friedrich Vock <friedrich.vock at gmx.de>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 3 +++
 include/uapi/drm/amdgpu_drm.h           | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index 924baf58e3226..8cba30144bac6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -1246,6 +1246,9 @@ int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 		return copy_to_user(out, &gpuvm_fault,
 				    min((size_t)size, sizeof(gpuvm_fault))) ? -EFAULT : 0;
 	}
+	case AMDGPU_INFO_EVICTED_VRAM:
+		ui64 = ttm_resource_manager_evicted_bytes(&adev->mman.vram_mgr.manager);
+		return copy_to_user(out, &ui64, min(size, 8u)) ? -EFAULT : 0;
 	default:
 		DRM_DEBUG_KMS("Invalid request %d\n", info->query);
 		return -EINVAL;
diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index 53552dd489b9b..5d04719386686 100644
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -920,6 +920,8 @@ struct drm_amdgpu_cs_chunk_cp_gfx_shadow {
 #define AMDGPU_INFO_MAX_IBS			0x22
 /* query last page fault info */
 #define AMDGPU_INFO_GPUVM_FAULT			0x23
+/* query size of evicted vram allocations */
+#define AMDGPU_INFO_EVICTED_VRAM                0x24

 #define AMDGPU_INFO_MMR_SE_INDEX_SHIFT	0
 #define AMDGPU_INFO_MMR_SE_INDEX_MASK	0xff
--
2.44.0