Re: [PATCH] drm/amd/amdkfd: adjust dummy functions ' placement

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Am 2021-01-27 um 5:14 a.m. schrieb Lang Yu:
> Move all the dummy functions in amdgpu_amdkfd.c to
> amdgpu_amdkfd.h as inline functions.
>
> Signed-off-by: Lang Yu <Lang.Yu@xxxxxxx>
> Suggested-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>

Just a some nit-picking inline, other than that the patch is

Reviewed-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>


> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c |  87 ------------
>  drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h | 151 ++++++++++++++++++---
>  2 files changed, 130 insertions(+), 108 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
> index db96d69eb45e..c5343a5eecbe 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
> @@ -47,12 +47,8 @@ int amdgpu_amdkfd_init(void)
>  	amdgpu_amdkfd_total_mem_size = si.totalram - si.totalhigh;
>  	amdgpu_amdkfd_total_mem_size *= si.mem_unit;
>  
> -#ifdef CONFIG_HSA_AMD
>  	ret = kgd2kfd_init();
>  	amdgpu_amdkfd_gpuvm_init_mem_limits();
> -#else
> -	ret = -ENOENT;
> -#endif
>  	kfd_initialized = !ret;
>  
>  	return ret;
> @@ -696,86 +692,3 @@ bool amdgpu_amdkfd_have_atomics_support(struct kgd_dev *kgd)
>  
>  	return adev->have_atomics_support;
>  }
> -
> -#ifndef CONFIG_HSA_AMD
> -bool amdkfd_fence_check_mm(struct dma_fence *f, struct mm_struct *mm)
> -{
> -	return false;
> -}
> -
> -void amdgpu_amdkfd_unreserve_memory_limit(struct amdgpu_bo *bo)
> -{
> -}
> -
> -int amdgpu_amdkfd_remove_fence_on_pt_pd_bos(struct amdgpu_bo *bo)
> -{
> -	return 0;
> -}
> -
> -void amdgpu_amdkfd_gpuvm_destroy_cb(struct amdgpu_device *adev,
> -					struct amdgpu_vm *vm)
> -{
> -}
> -
> -struct amdgpu_amdkfd_fence *to_amdgpu_amdkfd_fence(struct dma_fence *f)
> -{
> -	return NULL;
> -}
> -
> -int amdgpu_amdkfd_evict_userptr(struct kgd_mem *mem, struct mm_struct *mm)
> -{
> -	return 0;
> -}
> -
> -struct kfd_dev *kgd2kfd_probe(struct kgd_dev *kgd, struct pci_dev *pdev,
> -			      unsigned int asic_type, bool vf)
> -{
> -	return NULL;
> -}
> -
> -bool kgd2kfd_device_init(struct kfd_dev *kfd,
> -			 struct drm_device *ddev,
> -			 const struct kgd2kfd_shared_resources *gpu_resources)
> -{
> -	return false;
> -}
> -
> -void kgd2kfd_device_exit(struct kfd_dev *kfd)
> -{
> -}
> -
> -void kgd2kfd_exit(void)
> -{
> -}
> -
> -void kgd2kfd_suspend(struct kfd_dev *kfd, bool run_pm)
> -{
> -}
> -
> -int kgd2kfd_resume(struct kfd_dev *kfd, bool run_pm)
> -{
> -	return 0;
> -}
> -
> -int kgd2kfd_pre_reset(struct kfd_dev *kfd)
> -{
> -	return 0;
> -}
> -
> -int kgd2kfd_post_reset(struct kfd_dev *kfd)
> -{
> -	return 0;
> -}
> -
> -void kgd2kfd_interrupt(struct kfd_dev *kfd, const void *ih_ring_entry)
> -{
> -}
> -
> -void kgd2kfd_set_sram_ecc_flag(struct kfd_dev *kfd)
> -{
> -}
> -
> -void kgd2kfd_smi_event_throttle(struct kfd_dev *kfd, uint32_t throttle_bitmask)
> -{
> -}
> -#endif
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
> index bc9f0e42e0a2..c3a51c0d54e9 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
> @@ -94,11 +94,6 @@ enum kgd_engine_type {
>  	KGD_ENGINE_MAX
>  };
>  
> -struct amdgpu_amdkfd_fence *amdgpu_amdkfd_fence_create(u64 context,
> -						       struct mm_struct *mm);
> -bool amdkfd_fence_check_mm(struct dma_fence *f, struct mm_struct *mm);
> -struct amdgpu_amdkfd_fence *to_amdgpu_amdkfd_fence(struct dma_fence *f);
> -int amdgpu_amdkfd_remove_fence_on_pt_pd_bos(struct amdgpu_bo *bo);
>  
>  struct amdkfd_process_info {
>  	/* List head of all VMs that belong to a KFD process */
> @@ -132,8 +127,6 @@ void amdgpu_amdkfd_interrupt(struct amdgpu_device *adev,
>  void amdgpu_amdkfd_device_probe(struct amdgpu_device *adev);
>  void amdgpu_amdkfd_device_init(struct amdgpu_device *adev);
>  void amdgpu_amdkfd_device_fini(struct amdgpu_device *adev);
> -
> -int amdgpu_amdkfd_evict_userptr(struct kgd_mem *mem, struct mm_struct *mm);
>  int amdgpu_amdkfd_submit_ib(struct kgd_dev *kgd, enum kgd_engine_type engine,
>  				uint32_t vmid, uint64_t gpu_addr,
>  				uint32_t *ib_cmd, uint32_t ib_len);
> @@ -153,6 +146,38 @@ void amdgpu_amdkfd_gpu_reset(struct kgd_dev *kgd);
>  int amdgpu_queue_mask_bit_to_set_resource_bit(struct amdgpu_device *adev,
>  					int queue_bit);
>  
> +struct amdgpu_amdkfd_fence *amdgpu_amdkfd_fence_create(u64 context,
> +						       struct mm_struct *mm);
> +#if IS_ENABLED(CONFIG_HSA_AMD)
> +bool amdkfd_fence_check_mm(struct dma_fence *f, struct mm_struct *mm);
> +struct amdgpu_amdkfd_fence *to_amdgpu_amdkfd_fence(struct dma_fence *f);
> +int amdgpu_amdkfd_remove_fence_on_pt_pd_bos(struct amdgpu_bo *bo);
> +int amdgpu_amdkfd_evict_userptr(struct kgd_mem *mem, struct mm_struct *mm);
> +#else
> +static inline
> +bool amdkfd_fence_check_mm(struct dma_fence *f, struct mm_struct *mm)
> +{
> +	return false;
> +}
> +
> +static inline
> +struct amdgpu_amdkfd_fence *to_amdgpu_amdkfd_fence(struct dma_fence *f)
> +{
> +	return NULL;
> +}
> +
> +static inline
> +int amdgpu_amdkfd_remove_fence_on_pt_pd_bos(struct amdgpu_bo *bo)
> +{
> +	return 0;
> +}
> +
> +static inline
> +int amdgpu_amdkfd_evict_userptr(struct kgd_mem *mem, struct mm_struct *mm)
> +{
> +	return 0;
> +}
> +#endif
>  /* Shared API */
>  int amdgpu_amdkfd_alloc_gtt_mem(struct kgd_dev *kgd, size_t size,
>  				void **mem_obj, uint64_t *gpu_addr,
> @@ -215,8 +240,6 @@ int amdgpu_amdkfd_gpuvm_acquire_process_vm(struct kgd_dev *kgd,
>  					struct file *filp, unsigned int pasid,
>  					void **vm, void **process_info,
>  					struct dma_fence **ef);
> -void amdgpu_amdkfd_gpuvm_destroy_cb(struct amdgpu_device *adev,
> -				struct amdgpu_vm *vm);
>  void amdgpu_amdkfd_gpuvm_destroy_process_vm(struct kgd_dev *kgd, void *vm);
>  void amdgpu_amdkfd_gpuvm_release_process_vm(struct kgd_dev *kgd, void *vm);
>  uint64_t amdgpu_amdkfd_gpuvm_get_process_page_dir(void *vm);
> @@ -236,23 +259,46 @@ int amdgpu_amdkfd_gpuvm_map_gtt_bo_to_kernel(struct kgd_dev *kgd,
>  		struct kgd_mem *mem, void **kptr, uint64_t *size);
>  int amdgpu_amdkfd_gpuvm_restore_process_bos(void *process_info,
>  					    struct dma_fence **ef);
> -
>  int amdgpu_amdkfd_gpuvm_get_vm_fault_info(struct kgd_dev *kgd,
>  					      struct kfd_vm_fault_info *info);
> -
>  int amdgpu_amdkfd_gpuvm_import_dmabuf(struct kgd_dev *kgd,
>  				      struct dma_buf *dmabuf,
>  				      uint64_t va, void *vm,
>  				      struct kgd_mem **mem, uint64_t *size,
>  				      uint64_t *mmap_offset);
> -
> -void amdgpu_amdkfd_gpuvm_init_mem_limits(void);
> -void amdgpu_amdkfd_unreserve_memory_limit(struct amdgpu_bo *bo);
> -
>  int amdgpu_amdkfd_get_tile_config(struct kgd_dev *kgd,
>  				struct tile_config *config);
> -
> +#if IS_ENABLED(CONFIG_HSA_AMD)
> +void amdgpu_amdkfd_gpuvm_init_mem_limits(void);
> +void amdgpu_amdkfd_gpuvm_destroy_cb(struct amdgpu_device *adev,
> +				struct amdgpu_vm *vm);
> +void amdgpu_amdkfd_unreserve_memory_limit(struct amdgpu_bo *bo);
> +#else
> +static inline
> +void amdgpu_amdkfd_gpuvm_init_mem_limits(void)
> +{
> +		return;

The indentation is incorrect. But why do you need this return statement
at all?

The same question for the other return statements you added in void
functions.

Regards,
  Felix


> +}
> +
> +static inline
> +void amdgpu_amdkfd_gpuvm_destroy_cb(struct amdgpu_device *adev,
> +					struct amdgpu_vm *vm)
> +{
> +		return;
> +}
> +
> +static inline
> +void amdgpu_amdkfd_unreserve_memory_limit(struct amdgpu_bo *bo)
> +{
> +		return;
> +}
> +#endif
>  /* KGD2KFD callbacks */
> +int kgd2kfd_quiesce_mm(struct mm_struct *mm);
> +int kgd2kfd_resume_mm(struct mm_struct *mm);
> +int kgd2kfd_schedule_evict_and_restore_process(struct mm_struct *mm,
> +						struct dma_fence *fence);
> +#if IS_ENABLED(CONFIG_HSA_AMD)
>  int kgd2kfd_init(void);
>  void kgd2kfd_exit(void);
>  struct kfd_dev *kgd2kfd_probe(struct kgd_dev *kgd, struct pci_dev *pdev,
> @@ -266,11 +312,74 @@ int kgd2kfd_resume(struct kfd_dev *kfd, bool run_pm);
>  int kgd2kfd_pre_reset(struct kfd_dev *kfd);
>  int kgd2kfd_post_reset(struct kfd_dev *kfd);
>  void kgd2kfd_interrupt(struct kfd_dev *kfd, const void *ih_ring_entry);
> -int kgd2kfd_quiesce_mm(struct mm_struct *mm);
> -int kgd2kfd_resume_mm(struct mm_struct *mm);
> -int kgd2kfd_schedule_evict_and_restore_process(struct mm_struct *mm,
> -					       struct dma_fence *fence);
>  void kgd2kfd_set_sram_ecc_flag(struct kfd_dev *kfd);
>  void kgd2kfd_smi_event_throttle(struct kfd_dev *kfd, uint32_t throttle_bitmask);
> -
> +#else
> +static inline int kgd2kfd_init(void)
> +{
> +	return -ENOENT;
> +}
> +
> +static inline void kgd2kfd_exit(void)
> +{
> +		return;
> +}
> +
> +static inline
> +struct kfd_dev *kgd2kfd_probe(struct kgd_dev *kgd, struct pci_dev *pdev,
> +					unsigned int asic_type, bool vf)
> +{
> +	return NULL;
> +}
> +
> +static inline
> +bool kgd2kfd_device_init(struct kfd_dev *kfd, struct drm_device *ddev,
> +				const struct kgd2kfd_shared_resources *gpu_resources)
> +{
> +	return false;
> +}
> +
> +static inline void kgd2kfd_device_exit(struct kfd_dev *kfd)
> +{
> +		return;
> +}
> +
> +static inline void kgd2kfd_suspend(struct kfd_dev *kfd, bool run_pm)
> +{
> +		return;
> +}
> +
> +static inline int kgd2kfd_resume(struct kfd_dev *kfd, bool run_pm)
> +{
> +	return 0;
> +}
> +
> +static inline int kgd2kfd_pre_reset(struct kfd_dev *kfd)
> +{
> +	return 0;
> +}
> +
> +static inline int kgd2kfd_post_reset(struct kfd_dev *kfd)
> +{
> +	return 0;
> +}
> +
> +static inline
> +void kgd2kfd_interrupt(struct kfd_dev *kfd, const void *ih_ring_entry)
> +{
> +		return;
> +}
> +
> +static inline
> +void kgd2kfd_set_sram_ecc_flag(struct kfd_dev *kfd)
> +{
> +		return;
> +}
> +
> +static inline
> +void kgd2kfd_smi_event_throttle(struct kfd_dev *kfd, uint32_t throttle_bitmask)
> +{
> +		return;
> +}
> +#endif
>  #endif /* AMDGPU_AMDKFD_H_INCLUDED */
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