Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/s390/include/asm/chpid.h
10819 views
1
/*

2
 *  drivers/s390/cio/chpid.h

3
 *

4
 *    Copyright IBM Corp. 2007

5
 *    Author(s): Peter Oberparleiter <[email protected]>

6
 */

7


8
#ifndef _ASM_S390_CHPID_H

9
#define _ASM_S390_CHPID_H _ASM_S390_CHPID_H

10


11
#include <linux/string.h>

12
#include <linux/types.h>

13


14
#define __MAX_CHPID 255

15


16
struct chp_id {

17
	u8 reserved1;

18
	u8 cssid;

19
	u8 reserved2;

20
	u8 id;

21
} __attribute__((packed));

22


23
#ifdef __KERNEL__

24
#include <asm/cio.h>

25


26
static inline void chp_id_init(struct chp_id *chpid)

27
{

28
	memset(chpid, 0, sizeof(struct chp_id));

29
}

30


31
static inline int chp_id_is_equal(struct chp_id *a, struct chp_id *b)

32
{

33
	return (a->id == b->id) && (a->cssid == b->cssid);

34
}

35


36
static inline void chp_id_next(struct chp_id *chpid)

37
{

38
	if (chpid->id < __MAX_CHPID)

39
		chpid->id++;

40
	else {

41
		chpid->id = 0;

42
		chpid->cssid++;

43
	}

44
}

45


46
static inline int chp_id_is_valid(struct chp_id *chpid)

47
{

48
	return (chpid->cssid <= __MAX_CSSID);

49
}

50


51


52
#define chp_id_for_each(c) \

53
	for (chp_id_init(c); chp_id_is_valid(c); chp_id_next(c))

54
#endif /* __KERNEL */

55


56
#endif /* _ASM_S390_CHPID_H */

57


58