include/crypto/scatterwalk.h

1 /* SPDX-License-Identifier: GPL-2.0-or-later */
5  * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
6  * Copyright (c) 2002 Adam J. Richter <adam@yggdrasil.com>
7  * Copyright (c) 2004 Jean-Luc Cooke <jlcooke@certainkey.com>
31 	unsigned int len = walk->sg->offset + walk->sg->length - walk->offset;  in scatterwalk_pagelen()
32 	unsigned int len_this_page = offset_in_page(~walk->offset) + 1;  in scatterwalk_pagelen()
46 	walk->offset += nbytes;  in scatterwalk_advance()
51 	return sg_page(walk->sg) + (walk->offset >> PAGE_SHIFT);  in scatterwalk_page()
62 	walk->sg = sg;  in scatterwalk_start()
63 	walk->offset = sg->offset;  in scatterwalk_start()
69 	       offset_in_page(walk->offset);  in scatterwalk_map()
78 		page = sg_page(walk->sg) + ((walk->offset - 1) >> PAGE_SHIFT);  in scatterwalk_pagedone()
82 	if (more && walk->offset >= walk->sg->offset + walk->sg->length)  in scatterwalk_pagedone()
83 		scatterwalk_start(walk, sg_next(walk->sg));  in scatterwalk_pagedone()
89 	if (!more || walk->offset >= walk->sg->offset + walk->sg->length ||  in scatterwalk_done()
90 	    !(walk->offset & (PAGE_SIZE - 1)))  in scatterwalk_done()