GDS memory isn't used on gfx11. Only GDS OA is used. Marek
On Thu, Apr 6, 2023 at 5:09 AM Christian König <[email protected]> wrote: > Why that? > > This is the save buffer for GDS, not the old style GDS BOs. > > Christian. > > Am 06.04.23 um 09:36 schrieb Marek Olšák: > > gds_va is unnecessary. > > Marek > > On Thu, Mar 30, 2023 at 3:18 PM Alex Deucher <[email protected]> > wrote: > >> For GFX11, the UMD needs to allocate some shadow buffers >> to be used for preemption. The UMD allocates the buffers >> and passes the GPU virtual address to the kernel since the >> kernel will program the packet that specified these >> addresses as part of its IB submission frame. >> >> v2: UMD passes shadow init to tell kernel when to initialize >> the shadow >> >> Reviewed-by: Christian König <[email protected]> >> Signed-off-by: Alex Deucher <[email protected]> >> --- >> include/uapi/drm/amdgpu_drm.h | 10 ++++++++++ >> 1 file changed, 10 insertions(+) >> >> diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h >> index b6eb90df5d05..3d9474af6566 100644 >> --- a/include/uapi/drm/amdgpu_drm.h >> +++ b/include/uapi/drm/amdgpu_drm.h >> @@ -592,6 +592,7 @@ struct drm_amdgpu_gem_va { >> #define AMDGPU_CHUNK_ID_SCHEDULED_DEPENDENCIES 0x07 >> #define AMDGPU_CHUNK_ID_SYNCOBJ_TIMELINE_WAIT 0x08 >> #define AMDGPU_CHUNK_ID_SYNCOBJ_TIMELINE_SIGNAL 0x09 >> +#define AMDGPU_CHUNK_ID_CP_GFX_SHADOW 0x0a >> >> struct drm_amdgpu_cs_chunk { >> __u32 chunk_id; >> @@ -708,6 +709,15 @@ struct drm_amdgpu_cs_chunk_data { >> }; >> }; >> >> +#define AMDGPU_CS_CHUNK_CP_GFX_SHADOW_FLAGS_INIT_SHADOW 0x1 >> + >> +struct drm_amdgpu_cs_chunk_cp_gfx_shadow { >> + __u64 shadow_va; >> + __u64 csa_va; >> + __u64 gds_va; >> + __u64 flags; >> +}; >> + >> /* >> * Query h/w info: Flag that this is integrated (a.h.a. fusion) GPU >> * >> -- >> 2.39.2 >> >> >
