From 137dc4b9060e99a22dce59b42ca71912cf0180f3 Mon Sep 17 00:00:00 2001 From: Evan Quan Date: Wed, 4 Jul 2018 16:21:52 +0800 Subject: [PATCH] drm/amdgpu: pin the csb buffer on hw init v2 Without this pin, the csb buffer will be filled with inconsistent data after S3 resume. And that will causes gfx hang on gfxoff exit since this csb will be executed then. v2: fit amdgpu_bo_pin change(take one less argument) Signed-off-by: Evan Quan Reviewed-by: Huang Rui Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 40 +++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c index ac46eab..82f457a 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c @@ -943,6 +943,7 @@ static int gfx_v9_0_rlc_init(struct amdgpu_device *adev) dst_ptr = adev->gfx.rlc.cs_ptr; gfx_v9_0_get_csb_buffer(adev, dst_ptr); amdgpu_bo_kunmap(adev->gfx.rlc.clear_state_obj); + amdgpu_bo_unpin(adev->gfx.rlc.clear_state_obj); amdgpu_bo_unreserve(adev->gfx.rlc.clear_state_obj); } @@ -971,6 +972,39 @@ static int gfx_v9_0_rlc_init(struct amdgpu_device *adev) return 0; } +static int gfx_v9_0_csb_vram_pin(struct amdgpu_device *adev) +{ + int r; + + r = amdgpu_bo_reserve(adev->gfx.rlc.clear_state_obj, false); + if (unlikely(r != 0)) + return r; + + r = amdgpu_bo_pin(adev->gfx.rlc.clear_state_obj, + AMDGPU_GEM_DOMAIN_VRAM); + if (!r) + adev->gfx.rlc.clear_state_gpu_addr = + amdgpu_bo_gpu_offset(adev->gfx.rlc.clear_state_obj); + + amdgpu_bo_unreserve(adev->gfx.rlc.clear_state_obj); + + return r; +} + +static void gfx_v9_0_csb_vram_unpin(struct amdgpu_device *adev) +{ + int r; + + if (!adev->gfx.rlc.clear_state_obj) + return; + + r = amdgpu_bo_reserve(adev->gfx.rlc.clear_state_obj, true); + if (likely(r == 0)) { + amdgpu_bo_unpin(adev->gfx.rlc.clear_state_obj); + amdgpu_bo_unreserve(adev->gfx.rlc.clear_state_obj); + } +} + static void gfx_v9_0_mec_fini(struct amdgpu_device *adev) { amdgpu_bo_free_kernel(&adev->gfx.mec.hpd_eop_obj, NULL, NULL); @@ -3116,6 +3150,10 @@ static int gfx_v9_0_hw_init(void *handle) gfx_v9_0_gpu_init(adev); + r = gfx_v9_0_csb_vram_pin(adev); + if (r) + return r; + r = gfx_v9_0_rlc_resume(adev); if (r) return r; @@ -3224,6 +3262,8 @@ static int gfx_v9_0_hw_fini(void *handle) gfx_v9_0_cp_enable(adev, false); gfx_v9_0_rlc_stop(adev); + gfx_v9_0_csb_vram_unpin(adev); + return 0; } -- 2.7.4