[Public]
Guchun.
Thanks your reminder. I need to modify again.
--
Best Regards
Aaron Liu
> -----Original Message-----
> From: Chen, Guchun <guchun.c...@amd.com>
> Sent: Thursday, January 27, 2022 3:10 PM
> To: Liu, Aaron <aaron....@amd.com>; amd-gfx@lists.freedesktop.org
> Cc: Ji, Ruili <ruili...@amd.com>; Kim, Jonathan <jonathan....@amd.com>;
> Kuehling, Felix <felix.kuehl...@amd.com>; Liu, Aaron
> <aaron....@amd.com>; Huang, Ray <ray.hu...@amd.com>; Deucher,
> Alexander <alexander.deuc...@amd.com>
> Subject: RE: [PATCH] drm/amdgpu: move GTT allocation from gmc_sw_init
> to gmc_hw_init
>
> [Public]
>
> This will create sdma_access_bo only for ASIC with gmc v10? Original
> creation occurs in amdgpu_ttm_init, it's not limited to ASICs with gmc v10.
>
> Regards,
> Guchun
>
> -----Original Message-----
> From: amd-gfx <amd-gfx-boun...@lists.freedesktop.org> On Behalf Of
> Aaron Liu
> Sent: Thursday, January 27, 2022 3:04 PM
> To: amd-gfx@lists.freedesktop.org
> Cc: Ji, Ruili <ruili...@amd.com>; Kim, Jonathan <jonathan....@amd.com>;
> Kuehling, Felix <felix.kuehl...@amd.com>; Liu, Aaron
> <aaron....@amd.com>; Huang, Ray <ray.hu...@amd.com>; Deucher,
> Alexander <alexander.deuc...@amd.com>
> Subject: [PATCH] drm/amdgpu: move GTT allocation from gmc_sw_init to
> gmc_hw_init
>
> The below patch causes system hang for harvested ASICs.
> d015e9861e55 drm/amdgpu: improve debug VRAM access performance
> using sdma
>
> The root cause is that GTT buffer should be allocated after GC SA harvest
> programming completed.
>
> For harvested AISC, the GC SA harvest process(see utcl2_harvest) is
> programmed in gmc_v10_0_hw_init function. This is a hardware
> programming.
> Therefore should be located in hw init. Hence need to move GTT allocation
> from gmc_v10_0_sw_init to gmc_v10_0_hw_init.
>
> Signed-off-by: Aaron Liu <aaron....@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 8 --------
> drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c | 9 +++++++++
> 2 files changed, 9 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> index 3d8a20956b74..7ce0478b2908 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -1823,12 +1823,6 @@ int amdgpu_ttm_init(struct amdgpu_device
> *adev)
> return r;
> }
>
> - if (amdgpu_bo_create_kernel(adev, PAGE_SIZE, PAGE_SIZE,
> - AMDGPU_GEM_DOMAIN_GTT,
> - &adev->mman.sdma_access_bo, NULL,
> - &adev->mman.sdma_access_ptr))
> - DRM_WARN("Debug VRAM access will use slowpath MM
> access\n");
> -
> return 0;
> }
>
> @@ -1850,8 +1844,6 @@ void amdgpu_ttm_fini(struct amdgpu_device
> *adev)
> if (adev->mman.stolen_reserved_size)
> amdgpu_bo_free_kernel(&adev-
> >mman.stolen_reserved_memory,
> NULL, NULL);
> - amdgpu_bo_free_kernel(&adev->mman.sdma_access_bo, NULL,
> - &adev->mman.sdma_access_ptr);
> amdgpu_ttm_fw_reserve_vram_fini(adev);
>
> if (drm_dev_enter(adev_to_drm(adev), &idx)) { diff --git
> a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
> b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
> index 73ab0eebe4e2..c560bdc2a93c 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
> @@ -1062,6 +1062,12 @@ static int gmc_v10_0_hw_init(void *handle)
> if (adev->umc.funcs && adev->umc.funcs->init_registers)
> adev->umc.funcs->init_registers(adev);
>
> + if (amdgpu_bo_create_kernel(adev, PAGE_SIZE, PAGE_SIZE,
> + AMDGPU_GEM_DOMAIN_GTT,
> + &adev->mman.sdma_access_bo, NULL,
> + &adev->mman.sdma_access_ptr))
> + DRM_WARN("Debug VRAM access will use slowpath MM
> access\n");
> +
> return 0;
> }
>
> @@ -1082,6 +1088,9 @@ static int gmc_v10_0_hw_fini(void *handle) {
> struct amdgpu_device *adev = (struct amdgpu_device *)handle;
>
> + amdgpu_bo_free_kernel(&adev->mman.sdma_access_bo, NULL,
> + &adev->mman.sdma_access_ptr);
> +
> gmc_v10_0_gart_disable(adev);
>
> if (amdgpu_sriov_vf(adev)) {
> --
> 2.25.1
