// SPDX-License-Identifier: GPL-2.0#ifndef _MEDIA_FRAME_VECTOR_H#define _MEDIA_FRAME_VECTOR_H /* Container for pinned pfns / pages in frame_vector.c */struct frame_vector {	unsigned int nr_allocated;	/* Number of frames we have space for */	unsigned int nr_frames;	/* Number of frames stored in ptrs array */	bool got_ref;		/* Did we pin pages by getting page ref? */	bool is_pfns;		/* Does array contain pages or pfns? */	void *ptrs[];		/* Array of pinned pfns / pages. Use				 * pfns_vector_pages() or pfns_vector_pfns()				 * for access */}; struct frame_vector *frame_vector_create(unsigned int nr_frames);void frame_vector_destroy(struct frame_vector *vec);int get_vaddr_frames(unsigned long start, unsigned int nr_pfns,		     bool write, struct frame_vector *vec);void put_vaddr_frames(struct frame_vector *vec);int frame_vector_to_pages(struct frame_vector *vec);void frame_vector_to_pfns(struct frame_vector *vec); static inline unsigned int frame_vector_count(struct frame_vector *vec){	return vec->nr_frames;} static inline struct page **frame_vector_pages(struct frame_vector *vec){	if (vec->is_pfns) {		int err = frame_vector_to_pages(vec); 		if (err)			return ERR_PTR(err);	}	return (struct page **)(vec->ptrs);} static inline unsigned long *frame_vector_pfns(struct frame_vector *vec){	if (!vec->is_pfns)		frame_vector_to_pfns(vec);	return (unsigned long *)(vec->ptrs);} #endif /* _MEDIA_FRAME_VECTOR_H */