From ab9fcc6362e0699fc1150aa1d8503c40fce2c1e1 Mon Sep 17 00:00:00 2001 From: Amber Lin Date: Tue, 22 Apr 2025 15:54:19 -0400 Subject: [PATCH] drm/amdkfd: Set SDMA_RLCx_IB_CNTL/SWITCH_INSIDE_IB 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 Acked-by: Alex Deucher Signed-off-by: Alex Deucher --- 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 80320a6c8854a..97933d2a38032 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); } -- 2.50.1