zc.h

   1 #ifndef ZC_H
   2 # define ZC_H
   3
   4 #include "cryptodev_int.h"
   5
   6 /* For zero copy */
   7 int __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 release_user_pages(struct csession* ses);
  11
  12 int 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