drm/amdgpu: add UAPI to query GFX shadow sizes

Add UAPI to query the GFX shadow buffer requirements
for preemption on GFX11.  UMDs need to specify the shadow
areas for preemption.

v2: move into existing asic info query
    drop GDS as its use is determined by the UMD (Marek)
v3: Update comments to note that alignment is base
    virtual alignment (Alex)

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index fc09465..cc78528 100644 (file)
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -1138,6 +1138,14 @@ struct drm_amdgpu_info_device {
        __u64 mall_size;            /* AKA infinity cache */
        /* high 32 bits of the rb pipes mask */
        __u32 enabled_rb_pipes_mask_hi;
+       /* shadow area size for gfx11 */
+       __u32 shadow_size;
+       /* shadow area base virtual alignment for gfx11 */
+       __u32 shadow_alignment;
+       /* context save area size for gfx11 */
+       __u32 csa_size;
+       /* context save area base virtual alignment for gfx11 */
+       __u32 csa_alignment;
 };
 
 struct drm_amdgpu_info_hw_ip {