drivers/s390/char/hmcdrv_cache.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *    SE/HMC Drive (Read) Cache Functions
   4  *
   5  *    Copyright IBM Corp. 2013
   6  *    Author(s): Ralf Hoppe (rhoppe@de.ibm.com)
   7  */
   8
   9 #ifndef __HMCDRV_CACHE_H__
  10 #define __HMCDRV_CACHE_H__
  11
  12 #include <linux/mmzone.h>
  13 #include "hmcdrv_ftp.h"
  14
  15 #define HMCDRV_CACHE_SIZE_DFLT  (MAX_ORDER_NR_PAGES * PAGE_SIZE / 2UL)
  16
  17 typedef ssize_t (*hmcdrv_cache_ftpfunc)(const struct hmcdrv_ftp_cmdspec *ftp,
  18                                         size_t *fsize);
  19
  20 ssize_t hmcdrv_cache_cmd(const struct hmcdrv_ftp_cmdspec *ftp,
  21                          hmcdrv_cache_ftpfunc func);
  22 int hmcdrv_cache_startup(size_t cachesize);
  23 void hmcdrv_cache_shutdown(void);
  24
  25 #endif   /* __HMCDRV_CACHE_H__ */