On Thu, Oct 24, 2024 at 12:59 PM Shashank Sharma
<shashank.sharma@xxxxxxx> wrote:
>
> This callback gets the size and alignment requirements
> for the gfx shadow buffer for preemption.
>
> Cc: Alex Deucher <alexander.deucher@xxxxxxx>
> Cc: Christian Koenig <christian.koenig@xxxxxxx>
> Signed-off-by: Shashank Sharma <shashank.sharma@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
> ---
> drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c | 29 ++++++++++++++++++++++++++
> 1 file changed, 29 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c
> index 02244bd2c418..0ac0222b178c 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c
> @@ -860,6 +860,34 @@ static void gfx_v12_0_select_me_pipe_q(struct amdgpu_device *adev,
> soc24_grbm_select(adev, me, pipe, q, vm);
> }
>
> +/* all sizes are in bytes */
> +#define MQD_SHADOW_BASE_SIZE 73728
> +#define MQD_SHADOW_BASE_ALIGNMENT 256
> +#define MQD_FWWORKAREA_SIZE 484
> +#define MQD_FWWORKAREA_ALIGNMENT 256
> +
> +static void gfx_v12_0_get_gfx_shadow_info_nocheck(struct amdgpu_device *adev,
> + struct amdgpu_gfx_shadow_info *shadow_info)
> +{
> + shadow_info->shadow_size = MQD_SHADOW_BASE_SIZE;
> + shadow_info->shadow_alignment = MQD_SHADOW_BASE_ALIGNMENT;
> + shadow_info->csa_size = MQD_FWWORKAREA_SIZE;
> + shadow_info->csa_alignment = MQD_FWWORKAREA_ALIGNMENT;
> +}
> +
> +static int gfx_v12_0_get_gfx_shadow_info(struct amdgpu_device *adev,
> + struct amdgpu_gfx_shadow_info *shadow_info,
> + bool skip_check)
> +{
> + if (adev->gfx.cp_gfx_shadow || skip_check) {
> + gfx_v12_0_get_gfx_shadow_info_nocheck(adev, shadow_info);
> + return 0;
> + }
> +
> + memset(shadow_info, 0, sizeof(struct amdgpu_gfx_shadow_info));
> + return -EINVAL;
> +}
> +
> static const struct amdgpu_gfx_funcs gfx_v12_0_gfx_funcs = {
> .get_gpu_clock_counter = &gfx_v12_0_get_gpu_clock_counter,
> .select_se_sh = &gfx_v12_0_select_se_sh,
> @@ -868,6 +896,7 @@ static const struct amdgpu_gfx_funcs gfx_v12_0_gfx_funcs = {
> .read_wave_vgprs = &gfx_v12_0_read_wave_vgprs,
> .select_me_pipe_q = &gfx_v12_0_select_me_pipe_q,
> .update_perfmon_mgcg = &gfx_v12_0_update_perf_clk,
> + .get_gfx_shadow_info = &gfx_v12_0_get_gfx_shadow_info,
> };
>
> static int gfx_v12_0_gpu_early_init(struct amdgpu_device *adev)
> --
> 2.46.2
>
