On Tue, Apr 22, 2025 at 4:39 PM Amber Lin <amber....@amd.com> wrote: > > When submitting MQD to CP, set SDMA_RLCx_IB_CNTL/SWITCH_INSIDE_IB bit so > it'll allow SDMA preemption if there is a massive command buffer of > long-running SDMA commands. > > Signed-off-by: Amber Lin <amber....@amd.com>
Acked-by: Alex Deucher <alexander.deuc...@amd.com> > --- > drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c > b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c > index 80320a6c8854..116932a20b3f 100644 > --- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c > +++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c > @@ -495,6 +495,10 @@ static void update_mqd_sdma(struct mqd_manager *mm, void > *mqd, > m->sdma_engine_id = q->sdma_engine_id; > m->sdma_queue_id = q->sdma_queue_id; > m->sdmax_rlcx_dummy_reg = SDMA_RLC_DUMMY_DEFAULT; > + /* Allow context switch so we don't cross-process starve with a > massive > + * command buffer of long-running SDMA commands > + */ > + m->sdmax_rlcx_ib_cntl |= SDMA0_GFX_IB_CNTL__SWITCH_INSIDE_IB_MASK; > > q->is_active = QUEUE_IS_ACTIVE(*q); > } > -- > 2.34.1 >
