On 11/21/25 11:12, Pierre-Eric Pelloux-Prayer wrote:
> It avoids duplicated code and allows to output a warning.
>
> Signed-off-by: Pierre-Eric Pelloux-Prayer <[email protected]>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 13 ++++---------
> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 6 ++++++
> 2 files changed, 10 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index 54f7c81f287b..7167db54d722 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -3309,9 +3309,7 @@ static int amdgpu_device_ip_init(struct amdgpu_device
> *adev)
> if (r)
> goto init_failed;
>
> - if (adev->mman.buffer_funcs_ring &&
> - adev->mman.buffer_funcs_ring->sched.ready)
> - amdgpu_ttm_set_buffer_funcs_status(adev, true);
> + amdgpu_ttm_set_buffer_funcs_status(adev, true);
>
> /* Don't init kfd if whole hive need to be reset during init */
> if (adev->init_lvl->level != AMDGPU_INIT_LEVEL_MINIMAL_XGMI) {
> @@ -4191,8 +4189,7 @@ static int amdgpu_device_ip_resume(struct amdgpu_device
> *adev)
>
> r = amdgpu_device_ip_resume_phase2(adev);
>
> - if (adev->mman.buffer_funcs_ring->sched.ready)
> - amdgpu_ttm_set_buffer_funcs_status(adev, true);
> + amdgpu_ttm_set_buffer_funcs_status(adev, true);
>
> if (r)
> return r;
> @@ -5321,8 +5318,7 @@ int amdgpu_device_suspend(struct drm_device *dev, bool
> notify_clients)
> return 0;
>
> unwind_evict:
> - if (adev->mman.buffer_funcs_ring->sched.ready)
> - amdgpu_ttm_set_buffer_funcs_status(adev, true);
> + amdgpu_ttm_set_buffer_funcs_status(adev, true);
> amdgpu_fence_driver_hw_init(adev);
>
> unwind_userq:
> @@ -6050,8 +6046,7 @@ int amdgpu_device_reinit_after_reset(struct
> amdgpu_reset_context *reset_context)
> if (r)
> goto out;
>
> - if
> (tmp_adev->mman.buffer_funcs_ring->sched.ready)
> -
> amdgpu_ttm_set_buffer_funcs_status(tmp_adev, true);
> + amdgpu_ttm_set_buffer_funcs_status(tmp_adev,
> true);
>
> r = amdgpu_device_ip_resume_phase3(tmp_adev);
> if (r)
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> index 489880b2fb8e..9024dde0c5a7 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -2233,6 +2233,12 @@ u32 amdgpu_ttm_set_buffer_funcs_status(struct
> amdgpu_device *adev, bool enable)
> adev->mman.buffer_funcs_enabled == enable || adev->gmc.is_app_apu)
> return reserved_windows;
>
> + if ((!adev->mman.buffer_funcs_ring ||
> !adev->mman.buffer_funcs_ring->sched.ready) &&
> + enable) {
> + dev_warn(adev->dev, "Not enabling DMA transfers for in kernel
> use");
> + return 0;
> + }
> +
Only check that when enabling the functions. Could be that when disabling them
we have sched.ready set to false already.
Apart from that looks good to me.
Regards,
Christian.
> if (enable) {
> struct amdgpu_ring *ring;
> struct drm_gpu_scheduler *sched;
