Re: [PATCH v3 27/30] drm/xe: Basic SVM BO eviction

[Matthew Brost <matthew.brost@intel.com>]

On Tue, Dec 17, 2024 at 03:33:45PM -0800, Matthew Brost wrote:
> Wire xe_bo_move to GPU SVM migration via new helper xe_svm_bo_evict.
> 

Somehow lost the xe_bo.c changes in this rev which call xe_svm_bo_evict.
Ignore this patch.

Matt

> v2:
>  - Use xe_svm_bo_evict
>  - Drop bo->range
> v3:
>  - Kernel doc (Thomas)
> 
> Signed-off-by: Matthew Brost <matthew.brost@intel.com>
> ---
>  drivers/gpu/drm/xe/xe_svm.c | 14 ++++++++++++++
>  drivers/gpu/drm/xe/xe_svm.h |  2 ++
>  2 files changed, 16 insertions(+)
> 
> diff --git a/drivers/gpu/drm/xe/xe_svm.c b/drivers/gpu/drm/xe/xe_svm.c
> index a417d8942da4..8780a0b2c81e 100644
> --- a/drivers/gpu/drm/xe/xe_svm.c
> +++ b/drivers/gpu/drm/xe/xe_svm.c
> @@ -768,6 +768,20 @@ bool xe_svm_has_mapping(struct xe_vm *vm, u64 start, u64 end)
>  	return drm_gpusvm_has_mapping(&vm->svm.gpusvm, start, end);
>  }
>  
> +/**
> + * xe_svm_bo_evict() - SVM evict BO to system memory
> + * @bo: BO to evict
> + *
> + * SVM evict BO to system memory. GPU SVM layer ensures all device pages
> + * are evicted before returning.
> + *
> + * Return: 0 on success standard error code otherwise
> + */
> +int xe_svm_bo_evict(struct xe_bo *bo)
> +{
> +	return drm_gpusvm_evict_to_ram(&bo->devmem_allocation);
> +}
> +
>  #if IS_ENABLED(CONFIG_XE_DEVMEM_MIRROR)
>  static struct drm_pagemap_dma_addr
>  xe_drm_pagemap_map_dma(struct drm_pagemap *dpagemap,
> diff --git a/drivers/gpu/drm/xe/xe_svm.h b/drivers/gpu/drm/xe/xe_svm.h
> index d549dd9e8641..9e9d333bb9d3 100644
> --- a/drivers/gpu/drm/xe/xe_svm.h
> +++ b/drivers/gpu/drm/xe/xe_svm.h
> @@ -56,6 +56,8 @@ int xe_svm_handle_pagefault(struct xe_vm *vm, struct xe_vma *vma,
>  
>  bool xe_svm_has_mapping(struct xe_vm *vm, u64 start, u64 end);
>  
> +int xe_svm_bo_evict(struct xe_bo *bo);
> +
>  static inline bool xe_svm_range_pages_valid(struct xe_svm_range *range)
>  {
>  	return drm_gpusvm_range_pages_valid(range->base.gpusvm, &range->base);
> -- 
> 2.34.1
>