From 6a07ac702f022dc85b186e7d2bec6216a0c260b0 Mon Sep 17 00:00:00 2001 From: "Jesse.zhang@amd.com" Date: Wed, 16 Apr 2025 14:13:30 +0800 Subject: [PATCH 3282/5403] drm/amdgpu: optimize queue reset and stop logic for sdma_v5_2 This patch refactors the SDMA v5.2 queue reset and stop logic to improve code readability, maintainability, and performance. The key changes include: 1. **Generalized `sdma_v5_2_gfx_stop` Function**: - Added an `inst_mask` parameter to allow stopping specific SDMA instances instead of all instances. This is useful for resetting individual queues. 2. **Simplified `sdma_v5_2_reset_queue` Function**: - Removed redundant loops and checks by directly using the `ring->me` field to identify the SDMA instance. - Reused the `sdma_v5_2_gfx_stop` function to stop the queue, reducing code duplication. v1: The general coding style is to declare variables like "i" or "r" last. E.g. longest lines first and short lasts. (Chritian) Signed-off-by: Jesse Zhang Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c | 31 ++++++++------------------ 1 file changed, 9 insertions(+), 22 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c index fc95c2875ba5..a6e612b4a892 100644 --- a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c @@ -407,15 +407,15 @@ static void sdma_v5_2_ring_emit_fence(struct amdgpu_ring *ring, u64 addr, u64 se * sdma_v5_2_gfx_stop - stop the gfx async dma engines * * @adev: amdgpu_device pointer - * + * @inst_mask: mask of dma engine instances to be disabled * Stop the gfx async dma ring buffers. */ -static void sdma_v5_2_gfx_stop(struct amdgpu_device *adev) +static void sdma_v5_2_gfx_stop(struct amdgpu_device *adev, uint32_t inst_mask) { u32 rb_cntl, ib_cntl; int i; - for (i = 0; i < adev->sdma.num_instances; i++) { + for_each_inst(i, inst_mask) { rb_cntl = RREG32_SOC15_IP(GC, sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_GFX_RB_CNTL)); rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_GFX_RB_CNTL, RB_ENABLE, 0); WREG32_SOC15_IP(GC, sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_GFX_RB_CNTL), rb_cntl); @@ -506,9 +506,11 @@ static void sdma_v5_2_enable(struct amdgpu_device *adev, bool enable) { u32 f32_cntl; int i; + uint32_t inst_mask; + inst_mask = GENMASK(adev->sdma.num_instances - 1, 0); if (!enable) { - sdma_v5_2_gfx_stop(adev); + sdma_v5_2_gfx_stop(adev, inst_mask); sdma_v5_2_rlc_stop(adev); } @@ -1459,33 +1461,18 @@ static int sdma_v5_2_reset_queue(struct amdgpu_ring *ring, unsigned int vmid) static int sdma_v5_2_stop_queue(struct amdgpu_ring *ring) { - u32 rb_cntl, ib_cntl, f32_cntl, freeze, cntl, stat1_reg; + u32 f32_cntl, freeze, cntl, stat1_reg; struct amdgpu_device *adev = ring->adev; int i, j, r = 0; if (amdgpu_sriov_vf(adev)) return -EINVAL; - for (i = 0; i < adev->sdma.num_instances; i++) { - if (ring == &adev->sdma.instance[i].ring) - break; - } - - if (i == adev->sdma.num_instances) { - DRM_ERROR("sdma instance not found\n"); - return -EINVAL; - } - + i = ring->me; amdgpu_gfx_rlc_enter_safe_mode(adev, 0); /* stop queue */ - ib_cntl = RREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_GFX_IB_CNTL)); - ib_cntl = REG_SET_FIELD(ib_cntl, SDMA0_GFX_IB_CNTL, IB_ENABLE, 0); - WREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_GFX_IB_CNTL), ib_cntl); - - rb_cntl = RREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_GFX_RB_CNTL)); - rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_GFX_RB_CNTL, RB_ENABLE, 0); - WREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_GFX_RB_CNTL), rb_cntl); + sdma_v5_2_gfx_stop(adev, 1 << i); /*engine stop SDMA1_F32_CNTL.HALT to 1 and SDMAx_FREEZE freeze bit to 1 */ freeze = RREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_FREEZE)); -- 2.54.0