On 1/25/2024 1:37 PM, Le Ma wrote:
> This patch is to eliminate interrupt warning below:
>
> "[drm] Fence fallback timer expired on ring sdma0.0".
>
> An early vm pt clearing job is sent to SDMA ahead of interrupt enabled,
> introduced by patch below:
>
> - drm/amdkfd: Export DMABufs from KFD using GEM handles
>
The drm client creation logic in this patch won't work well for dynamic
partition switch cases. Better add a ''Fixes' tag also.
This looks fine to me, needs to be checked by Felix anyway.
Thanks,
Lijo
> And re-locating the drm client creation following after drm_dev_register
> looks like a more proper flow.
>
> v2: wrap the drm client creation
>
> Signed-off-by: Le Ma <le...@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c | 32 ++++++++++++++--------
> drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h | 2 ++
> drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 4 +++
> 3 files changed, 27 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
> index 77e263660288..41db030ddc4e 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
> @@ -141,11 +141,31 @@ static void amdgpu_amdkfd_reset_work(struct work_struct
> *work)
> static const struct drm_client_funcs kfd_client_funcs = {
> .unregister = drm_client_release,
> };
> +
> +int amdgpu_amdkfd_drm_client_create(struct amdgpu_device *adev)
> +{
> + int ret;
> +
> + if (!adev->kfd.init_complete)
> + return 0;
> +
> + ret = drm_client_init(&adev->ddev, &adev->kfd.client, "kfd",
> + &kfd_client_funcs);
> + if (ret) {
> + dev_err(adev->dev, "Failed to init DRM client: %d\n",
> + ret);
> + return ret;
> + }
> +
> + drm_client_register(&adev->kfd.client);
> +
> + return 0;
> +}
> +
> void amdgpu_amdkfd_device_init(struct amdgpu_device *adev)
> {
> int i;
> int last_valid_bit;
> - int ret;
>
> amdgpu_amdkfd_gpuvm_init_mem_limits();
>
> @@ -164,12 +184,6 @@ void amdgpu_amdkfd_device_init(struct amdgpu_device
> *adev)
> .enable_mes = adev->enable_mes,
> };
>
> - ret = drm_client_init(&adev->ddev, &adev->kfd.client, "kfd",
> &kfd_client_funcs);
> - if (ret) {
> - dev_err(adev->dev, "Failed to init DRM client: %d\n",
> ret);
> - return;
> - }
> -
> /* this is going to have a few of the MSBs set that we need to
> * clear
> */
> @@ -208,10 +222,6 @@ void amdgpu_amdkfd_device_init(struct amdgpu_device
> *adev)
>
> adev->kfd.init_complete = kgd2kfd_device_init(adev->kfd.dev,
> &gpu_resources);
> - if (adev->kfd.init_complete)
> - drm_client_register(&adev->kfd.client);
> - else
> - drm_client_release(&adev->kfd.client);
>
> amdgpu_amdkfd_total_mem_size += adev->gmc.real_vram_size;
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
> index 584a0cea5572..da175c384adf 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
> @@ -182,6 +182,8 @@ int amdgpu_queue_mask_bit_to_set_resource_bit(struct
> amdgpu_device *adev,
> struct amdgpu_amdkfd_fence *amdgpu_amdkfd_fence_create(u64 context,
> struct mm_struct *mm,
> struct svm_range_bo *svm_bo);
> +
> +int amdgpu_amdkfd_drm_client_create(struct amdgpu_device *adev);
> #if defined(CONFIG_DEBUG_FS)
> int kfd_debugfs_kfd_mem_limits(struct seq_file *m, void *data);
> #endif
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> index 475bd59c9ac2..91d5d9435067 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> @@ -2255,6 +2255,10 @@ static int amdgpu_pci_probe(struct pci_dev *pdev,
> if (ret)
> goto err_pci;
>
> + ret = amdgpu_amdkfd_drm_client_create(adev);
> + if (ret)
> + goto err_pci;
> +
> /*
> * 1. don't init fbdev on hw without DCE
> * 2. don't init fbdev if there are no connectors
