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xpmem: porting xpmem v2.6.3

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implement xpmem_make, xpmem_remove
This commit is contained in:
Yoichi Umezawa
2016-12-16 17:00:09 +09:00
parent aa15e5eea8
commit f410af1cfc
9 changed files with 1330 additions and 3 deletions
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153
lib/include/mc_xpmem.h Normal file
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/**
* \file mc_xpmem.h
* License details are found in the file LICENSE.
* \brief
* Cross Partition Memory (XPMEM) structures and macros.
*/
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (c) 2004-2007 Silicon Graphics, Inc. All Rights Reserved.
*/
/*
* HISTORY
*/
#ifndef _MC_XPMEM_H
#define _MC_XPMEM_H
#ifndef __KERNEL__
#include <sys/types.h>
#endif
/*
* _IOC definitions for McKernel
*/
#define _IOC_NRBITS 8
#define _IOC_TYPEBITS 8
#define _IOC_SIZEBITS 14
#define _IOC_DIRBITS 2
#define _IOC_NRSHIFT 0
#define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS)
#define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS)
#define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS)
#define _IOC_NONE 0U
#define _IOC(dir,type,nr,size) \
(((dir) << _IOC_DIRSHIFT) | \
((type) << _IOC_TYPESHIFT) | \
((nr) << _IOC_NRSHIFT) | \
((size) << _IOC_SIZESHIFT))
#define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0)
/*
* basic argument type definitions for McKernel
*/
typedef uint64_t u64;
typedef uint64_t __u64;
typedef int64_t __s64;
/*
* basic argument type definitions
*/
typedef __s64 xpmem_segid_t; /* segid returned from xpmem_make() */
typedef __s64 xpmem_apid_t; /* apid returned from xpmem_get() */
struct xpmem_addr {
xpmem_apid_t apid; /* apid that represents memory */
off_t offset; /* offset into apid's memory */
};
#define XPMEM_MAXADDR_SIZE (size_t)(-1L)
/*
* path to XPMEM device
*/
#define XPMEM_DEV_PATH "/dev/xpmem"
/*
* The following are the possible XPMEM related errors.
*/
#define XPMEM_ERRNO_NOPROC 2004 /* unknown thread due to fork() */
/*
* flags for segment permissions
*/
#define XPMEM_RDONLY 0x1
#define XPMEM_RDWR 0x2
/*
* Valid permit_type values for xpmem_make().
*/
#define XPMEM_PERMIT_MODE 0x1
/*
* ioctl() commands used to interface to the kernel module.
*/
#define XPMEM_IOC_MAGIC 'x'
#define XPMEM_CMD_VERSION _IO(XPMEM_IOC_MAGIC, 0)
#define XPMEM_CMD_MAKE _IO(XPMEM_IOC_MAGIC, 1)
#define XPMEM_CMD_REMOVE _IO(XPMEM_IOC_MAGIC, 2)
#define XPMEM_CMD_GET _IO(XPMEM_IOC_MAGIC, 3)
#define XPMEM_CMD_RELEASE _IO(XPMEM_IOC_MAGIC, 4)
#define XPMEM_CMD_ATTACH _IO(XPMEM_IOC_MAGIC, 5)
#define XPMEM_CMD_DETACH _IO(XPMEM_IOC_MAGIC, 6)
/*
* Structures used with the preceding ioctl() commands to pass data.
*/
struct xpmem_cmd_make {
__u64 vaddr;
size_t size;
int permit_type;
__u64 permit_value;
xpmem_segid_t segid; /* returned on success */
};
struct xpmem_cmd_remove {
xpmem_segid_t segid;
};
struct xpmem_cmd_get {
xpmem_segid_t segid;
int flags;
int permit_type;
__u64 permit_value;
xpmem_apid_t apid; /* returned on success */
};
struct xpmem_cmd_release {
xpmem_apid_t apid;
};
struct xpmem_cmd_attach {
xpmem_apid_t apid;
off_t offset;
size_t size;
__u64 vaddr;
int fd;
int flags;
};
struct xpmem_cmd_detach {
__u64 vaddr;
};
#ifndef __KERNEL__
extern int xpmem_version(void);
extern xpmem_segid_t xpmem_make(void *, size_t, int, void *);
extern int xpmem_remove(xpmem_segid_t);
extern xpmem_apid_t xpmem_get(xpmem_segid_t, int, int, void *);
extern int xpmem_release(xpmem_apid_t);
extern void *xpmem_attach(struct xpmem_addr, size_t, void *);
extern int xpmem_detach(void *);
#endif
#endif /* _MC_XPMEM_H */