From: Donald Robson <[email protected]> Determining the start and range of the unmap stage of a remap op is a common piece of code currently implemented by multiple drivers. Add a helper for this.
Changes since v6: - Remove use of __always_inline Signed-off-by: Donald Robson <[email protected]> Signed-off-by: Sarah Walker <[email protected]> --- include/drm/drm_gpuvm.h | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/include/drm/drm_gpuvm.h b/include/drm/drm_gpuvm.h index c7ed6bf441d4..932e942da921 100644 --- a/include/drm/drm_gpuvm.h +++ b/include/drm/drm_gpuvm.h @@ -702,4 +702,31 @@ void drm_gpuva_remap(struct drm_gpuva *prev, void drm_gpuva_unmap(struct drm_gpuva_op_unmap *op); +/** + * drm_gpuva_op_remap_get_unmap_range() - Helper to get the start and range of + * the unmap stage of a remap op. + * @op: Remap op. + * @start_addr: Output pointer for the start of the required unmap. + * @range: Output pointer for the length of the required unmap. + * + * These parameters can then be used by the caller to unmap memory pages that + * are no longer required. + */ +static inline void +drm_gpuva_op_remap_get_unmap_range(const struct drm_gpuva_op_remap *op, + u64 *start_addr, u64 *range) +{ + const u64 va_start = op->prev ? + op->prev->va.addr + op->prev->va.range : + op->unmap->va->va.addr; + const u64 va_end = op->next ? + op->next->va.addr : + op->unmap->va->va.addr + op->unmap->va->va.range; + + if (start_addr) + *start_addr = va_start; + if (range) + *range = va_end - va_start; +} + #endif /* __DRM_GPUVM_H__ */ -- 2.42.0
