On Thu, 2023-11-02 at 00:30 +0100, Danilo Krummrich wrote:
> Drivers may use this function to validate userspace requests in
> advance,
> hence export it.
>
> Signed-off-by: Danilo Krummrich <dakr@xxxxxxxxxx>
Reviewed-by: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/drm_gpuvm.c | 14 +++++++++++++-
> include/drm/drm_gpuvm.h | 1 +
> 2 files changed, 14 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/drm_gpuvm.c
> b/drivers/gpu/drm/drm_gpuvm.c
> index 445767f8fbc4..2669f9bbc377 100644
> --- a/drivers/gpu/drm/drm_gpuvm.c
> +++ b/drivers/gpu/drm/drm_gpuvm.c
> @@ -649,7 +649,18 @@ drm_gpuvm_in_kernel_node(struct drm_gpuvm
> *gpuvm, u64 addr, u64 range)
> return krange && addr < kend && kstart < end;
> }
>
> -static bool
> +/**
> + * drm_gpuvm_range_valid() - checks whether the given range is valid
> for the
> + * given &drm_gpuvm
> + * @gpuvm: the GPUVM to check the range for
> + * @addr: the base address
> + * @range: the range starting from the base address
> + *
> + * Checks whether the range is within the GPUVM's managed
> boundaries.
> + *
> + * Returns: true for a valid range, false otherwise
> + */
> +bool
> drm_gpuvm_range_valid(struct drm_gpuvm *gpuvm,
> u64 addr, u64 range)
> {
> @@ -657,6 +668,7 @@ drm_gpuvm_range_valid(struct drm_gpuvm *gpuvm,
> drm_gpuvm_in_mm_range(gpuvm, addr, range) &&
> !drm_gpuvm_in_kernel_node(gpuvm, addr, range);
> }
> +EXPORT_SYMBOL_GPL(drm_gpuvm_range_valid);
>
> /**
> * drm_gpuvm_init() - initialize a &drm_gpuvm
> diff --git a/include/drm/drm_gpuvm.h b/include/drm/drm_gpuvm.h
> index 687fd5893624..13eac6f70061 100644
> --- a/include/drm/drm_gpuvm.h
> +++ b/include/drm/drm_gpuvm.h
> @@ -253,6 +253,7 @@ void drm_gpuvm_init(struct drm_gpuvm *gpuvm,
> const char *name,
> const struct drm_gpuvm_ops *ops);
> void drm_gpuvm_destroy(struct drm_gpuvm *gpuvm);
>
> +bool drm_gpuvm_range_valid(struct drm_gpuvm *gpuvm, u64 addr, u64
> range);
> bool drm_gpuvm_interval_empty(struct drm_gpuvm *gpuvm, u64 addr, u64
> range);
>
> static inline struct drm_gpuva *
