Hi all, Does this actually work on SR-IOV? Or does it just seem to but nothing bad happens because we get a GPU reset on a world switch? I honestly don't know. I think that SR-IOV uses a specialized firmware where this packet has a different meaning.
But the real fix would be to get the RLC firmware fix to not reinitialize those regs to zero on world switch. [Emily]Yes, it actually works on SR-IOV, it fixes lots of engine hang issue. Best Wishes, Emily Deng From: Christian König [mailto:ckoenig.leichtzumer...@gmail.com] Sent: Tuesday, April 17, 2018 11:27 PM To: Deucher, Alexander <alexander.deuc...@amd.com>; amd-gfx@lists.freedesktop.org; Deng, Emily <emily.d...@amd.com>; Liu, Monk <monk....@amd.com> Subject: Re: [PATCH] drm/amdgpu: limit reg_write_reg_wait workaround to SRIOV Does this actually work on SR-IOV? Or does it just seem to but nothing bad happens because we get a GPU reset on a world switch? I honestly don't know. I think that SR-IOV uses a specialized firmware where this packet has a different meaning. But the real fix would be to get the RLC firmware fix to not reinitialize those regs to zero on world switch. Christian. Am 17.04.2018 um 16:02 schrieb Deucher, Alexander: Does this actually work on SR-IOV? Or does it just seem to but nothing bad happens because we get a GPU reset on a world switch? The behavior of this packet should be the same as SDMA and that definitely doesn't work. I don't see why this would be any different. Acked-by: Alex Deucher <alexander.deuc...@amd.com><mailto:alexander.deuc...@amd.com> Alex ________________________________ From: amd-gfx <amd-gfx-boun...@lists.freedesktop.org><mailto:amd-gfx-boun...@lists.freedesktop.org> on behalf of Christian König <ckoenig.leichtzumer...@gmail.com><mailto:ckoenig.leichtzumer...@gmail.com> Sent: Tuesday, April 17, 2018 9:01:35 AM To: amd-gfx@lists.freedesktop.org<mailto:amd-gfx@lists.freedesktop.org> Subject: [PATCH] drm/amdgpu: limit reg_write_reg_wait workaround to SRIOV Turned out that this locks up some bare metal Vega10. Signed-off-by: Christian König <christian.koe...@amd.com><mailto:christian.koe...@amd.com> --- drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c index 583f6f616dd3..5329d7e5fb71 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c @@ -4144,7 +4144,12 @@ static void gfx_v9_0_ring_emit_reg_write_reg_wait(struct amdgpu_ring *ring, { int usepfp = (ring->funcs->type == AMDGPU_RING_TYPE_GFX); - gfx_v9_0_wait_reg_mem(ring, usepfp, 0, 1, reg0, reg1, ref, mask, 0x20); + if (amdgpu_sriov_vf(adev)) + gfx_v9_0_wait_reg_mem(ring, usepfp, 0, 1, reg0, reg1, + ref, mask, 0x20); + else + amdgpu_ring_emit_reg_write_reg_wait_helper(ring, reg0, reg1, + ref, mask); } static void gfx_v9_0_set_gfx_eop_interrupt_state(struct amdgpu_device *adev, -- 2.14.1 _______________________________________________ amd-gfx mailing list amd-gfx@lists.freedesktop.org<mailto:amd-gfx@lists.freedesktop.org> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
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