Re: [PATCH 5.15 082/135] drm/amdgpu: unify BO evicting method in amdgpu_ttm

Christian König
2022-05-10T15:24:46Z

Hi Greg,

sorry only noticing this now. Why is that patch backported?

I mean it probably doesn't hurt, but that is just a code cleanup without
much function difference and not a bug fix.

Regards,
Christian.

Am 10.05.22 um 15:07 schrieb Greg Kroah-Hartman:
> From: Nirmoy Das <nirmoy.das@amd.com>
>
> commit 58144d283712c9e80e528e001af6ac5aeee71af2 upstream.
>
> Unify BO evicting functionality for possible memory
> types in amdgpu_ttm.c.
>
> Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
> Reviewed-by: Christian König <christian.koenig@amd.com>
> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
> Cc: "Limonciello, Mario" <Mario.Limonciello@amd.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 8 ++-----
> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 30 ++++++++++++++++++++++------
> drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 23 ---------------------
> drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 1
> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 30 ++++++++++++++++++++++++++++
> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 1
> 6 files changed, 58 insertions(+), 35 deletions(-)
>
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
> @@ -1176,7 +1176,7 @@ static int amdgpu_debugfs_evict_vram(voi
> return r;
> }
>
> - *val = amdgpu_bo_evict_vram(adev);
> + *val = amdgpu_ttm_evict_resources(adev, TTM_PL_VRAM);
>
> pm_runtime_mark_last_busy(dev->dev);
> pm_runtime_put_autosuspend(dev->dev);
> @@ -1189,17 +1189,15 @@ static int amdgpu_debugfs_evict_gtt(void
> {
> struct amdgpu_device *adev = (struct amdgpu_device *)data;
> struct drm_device *dev = adev_to_drm(adev);
> - struct ttm_resource_manager *man;
> int r;
>
> r = pm_runtime_get_sync(dev->dev);
> if (r < 0) {
> - pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
> + pm_runtime_put_autosuspend(dev->dev);
> return r;
> }
>
> - man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
> - *val = ttm_resource_manager_evict_all(&adev->mman.bdev, man);
> + *val = amdgpu_ttm_evict_resources(adev, TTM_PL_TT);
>
> pm_runtime_mark_last_busy(dev->dev);
> pm_runtime_put_autosuspend(dev->dev);
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -3928,6 +3928,25 @@ void amdgpu_device_fini_sw(struct amdgpu
>
> }
>
> +/**
> + * amdgpu_device_evict_resources - evict device resources
> + * @adev: amdgpu device object
> + *
> + * Evicts all ttm device resources(vram BOs, gart table) from the lru list
> + * of the vram memory type. Mainly used for evicting device resources
> + * at suspend time.
> + *
> + */
> +static void amdgpu_device_evict_resources(struct amdgpu_device *adev)
> +{
> + /* No need to evict vram on APUs for suspend to ram */
> + if (adev->in_s3 && (adev->flags & AMD_IS_APU))
> + return;
> +
> + if (amdgpu_ttm_evict_resources(adev, TTM_PL_VRAM))
> + DRM_WARN("evicting device resources failed\n");
> +
> +}
>
> /*
> * Suspend & resume.
> @@ -3968,17 +3987,16 @@ int amdgpu_device_suspend(struct drm_dev
> if (!adev->in_s0ix)
> amdgpu_amdkfd_suspend(adev, adev->in_runpm);
>
> - /* evict vram memory */
> - amdgpu_bo_evict_vram(adev);
> + /* First evict vram memory */
> + amdgpu_device_evict_resources(adev);
>
> amdgpu_fence_driver_hw_fini(adev);
>
> amdgpu_device_ip_suspend_phase2(adev);
> - /* evict remaining vram memory
> - * This second call to evict vram is to evict the gart page table
> - * using the CPU.
> + /* This second call to evict device resources is to evict
> + * the gart page table using the CPU.
> */
> - amdgpu_bo_evict_vram(adev);
> + amdgpu_device_evict_resources(adev);
>
> return 0;
> }
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> @@ -1038,29 +1038,6 @@ void amdgpu_bo_unpin(struct amdgpu_bo *b
> }
> }
>
> -/**
> - * amdgpu_bo_evict_vram - evict VRAM buffers
> - * @adev: amdgpu device object
> - *
> - * Evicts all VRAM buffers on the lru list of the memory type.
> - * Mainly used for evicting vram at suspend time.
> - *
> - * Returns:
> - * 0 for success or a negative error code on failure.
> - */
> -int amdgpu_bo_evict_vram(struct amdgpu_device *adev)
> -{
> - struct ttm_resource_manager *man;
> -
> - if (adev->in_s3 && (adev->flags & AMD_IS_APU)) {
> - /* No need to evict vram on APUs for suspend to ram */
> - return 0;
> - }
> -
> - man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM);
> - return ttm_resource_manager_evict_all(&adev->mman.bdev, man);
> -}
> -
> static const char *amdgpu_vram_names[] = {
> "UNKNOWN",
> "GDDR1",
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
> @@ -304,7 +304,6 @@ int amdgpu_bo_pin(struct amdgpu_bo *bo,
> int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain,
> u64 min_offset, u64 max_offset);
> void amdgpu_bo_unpin(struct amdgpu_bo *bo);
> -int amdgpu_bo_evict_vram(struct amdgpu_device *adev);
> int amdgpu_bo_init(struct amdgpu_device *adev);
> void amdgpu_bo_fini(struct amdgpu_device *adev);
> int amdgpu_bo_set_tiling_flags(struct amdgpu_bo *bo, u64 tiling_flags);
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -2036,6 +2036,36 @@ error_free:
> return r;
> }
>
> +/**
> + * amdgpu_ttm_evict_resources - evict memory buffers
> + * @adev: amdgpu device object
> + * @mem_type: evicted BO's memory type
> + *
> + * Evicts all @mem_type buffers on the lru list of the memory type.
> + *
> + * Returns:
> + * 0 for success or a negative error code on failure.
> + */
> +int amdgpu_ttm_evict_resources(struct amdgpu_device *adev, int mem_type)
> +{
> + struct ttm_resource_manager *man;
> +
> + switch (mem_type) {
> + case TTM_PL_VRAM:
> + case TTM_PL_TT:
> + case AMDGPU_PL_GWS:
> + case AMDGPU_PL_GDS:
> + case AMDGPU_PL_OA:
> + man = ttm_manager_type(&adev->mman.bdev, mem_type);
> + break;
> + default:
> + DRM_ERROR("Trying to evict invalid memory type\n");
> + return -EINVAL;
> + }
> +
> + return ttm_resource_manager_evict_all(&adev->mman.bdev, man);
> +}
> +
> #if defined(CONFIG_DEBUG_FS)
>
> static int amdgpu_mm_vram_table_show(struct seq_file *m, void *unused)
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> @@ -190,6 +190,7 @@ bool amdgpu_ttm_tt_is_readonly(struct tt
> uint64_t amdgpu_ttm_tt_pde_flags(struct ttm_tt *ttm, struct ttm_resource *mem);
> uint64_t amdgpu_ttm_tt_pte_flags(struct amdgpu_device *adev, struct ttm_tt *ttm,
> struct ttm_resource *mem);
> +int amdgpu_ttm_evict_resources(struct amdgpu_device *adev, int mem_type);
>
> void amdgpu_ttm_debugfs_init(struct amdgpu_device *adev);
>
>
>