1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 3 #ifndef ZC_H 4 # define ZC_H 5 6 /* For zero copy */ 7 int __cryptodev_get_userbuf(uint8_t __user *addr, uint32_t len, int write, 8 unsigned int pgcount, struct page **pg, struct scatterlist *sg, 9 struct task_struct *task, struct mm_struct *mm); 10 void cryptodev_release_user_pages(struct csession *ses); 11 12 int cryptodev_get_userbuf(struct csession *ses, 13 void *__user src, unsigned int src_len, 14 void *__user dst, unsigned int dst_len, 15 struct task_struct *task, struct mm_struct *mm, 16 struct scatterlist **src_sg, 17 struct scatterlist **dst_sg); 18 19 /* buflen ? (last page - first page + 1) : 0 */ 20 #define PAGECOUNT(buf, buflen) ((buflen) \ 21 ? ((((unsigned long)(buf + buflen - 1)) >> PAGE_SHIFT) - \ 22 (((unsigned long)(buf )) >> PAGE_SHIFT) + 1) \ 23 : 0) 24 25 #define DEFAULT_PREALLOC_PAGES 32 26 27 #endif 28