Attachment 145734 Details for Bug 111481 – sdma read delay

[patch] sdma read delay

read-delay-1cycle.patch (text/plain), 1.38 KB, created by Pierre-Eric Pelloux-Prayer on 2019-10-14 10:09:15 UTC

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Creator: Pierre-Eric Pelloux-Prayer

Created: 2019-10-14 10:09:15 UTC

Size: 1.38 KB

patch

obsolete

>diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
>index fb48622c2abd..3912179a3c88 100644
>--- a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
>+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
>@@ -345,6 +345,13 @@ static uint64_t gmc_v10_0_emit_flush_gpu_tlb(struct amdgpu_ring *ring,
> 
> 	amdgpu_ring_emit_wreg(ring, hub->vm_inv_eng0_req + eng, req);
> 
>+	/* Insert a dummy read to delay one cycle before the ACK
>+	 * inquiry.
>+	 */
>+	if (ring->funcs->type == AMDGPU_RING_TYPE_SDMA)
>+		amdgpu_ring_emit_reg_wait(ring,
>+					  hub->vm_inv_eng0_req + eng, 0, 0);
>+
> 	/* wait for the invalidate to complete */
> 	amdgpu_ring_emit_reg_wait(ring, hub->vm_inv_eng0_ack + eng,
> 				  1 << vmid, 1 << vmid);
>diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
>index 6cd5d4ad0817..e187682932e6 100644
>--- a/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
>+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
>@@ -1588,7 +1588,7 @@ static const struct amdgpu_ring_funcs sdma_v5_0_ring_funcs = {
> 		6 + /* sdma_v5_0_ring_emit_pipeline_sync */
> 		/* sdma_v5_0_ring_emit_vm_flush */
> 		SOC15_FLUSH_GPU_TLB_NUM_WREG * 3 +
>-		SOC15_FLUSH_GPU_TLB_NUM_REG_WAIT * 6 +
>+		SOC15_FLUSH_GPU_TLB_NUM_REG_WAIT * 6 * 2 +
> 		10 + 10 + 10, /* sdma_v5_0_ring_emit_fence x3 for user fence, vm fence */
> 	.emit_ib_size = 7 + 6, /* sdma_v5_0_ring_emit_ib */
> 	.emit_ib = sdma_v5_0_ring_emit_ib,

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Attachments on bug 111481: 145225 | 145232 | 145233 | 145323 | 145324 | 145326 | 145436 | 145439 | 145668 | 145734 | 145766 | 145773 | 145799 | 145800 | 145807 | 145814 | 145827 | 145882 | 145904 | 145917

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