Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/edac/edac_stub.c
15109 views
1
/*

2
 * common EDAC components that must be in kernel

3
 *

4
 * Author: Dave Jiang <[email protected]>

5
 *

6
 * 2007 (c) MontaVista Software, Inc.

7
 * 2010 (c) Advanced Micro Devices Inc.

8
 *	    Borislav Petkov <[email protected]>

9
 *

10
 * This file is licensed under the terms of the GNU General Public

11
 * License version 2. This program is licensed "as is" without any

12
 * warranty of any kind, whether express or implied.

13
 *

14
 */

15
#include <linux/module.h>

16
#include <linux/edac.h>

17
#include <asm/atomic.h>

18
#include <asm/edac.h>

19


20
int edac_op_state = EDAC_OPSTATE_INVAL;

21
EXPORT_SYMBOL_GPL(edac_op_state);

22


23
atomic_t edac_handlers = ATOMIC_INIT(0);

24
EXPORT_SYMBOL_GPL(edac_handlers);

25


26
int edac_err_assert = 0;

27
EXPORT_SYMBOL_GPL(edac_err_assert);

28


29
static atomic_t edac_class_valid = ATOMIC_INIT(0);

30


31
/*

32
 * called to determine if there is an EDAC driver interested in

33
 * knowing an event (such as NMI) occurred

34
 */

35
int edac_handler_set(void)

36
{

37
	if (edac_op_state == EDAC_OPSTATE_POLL)

38
		return 0;

39


40
	return atomic_read(&edac_handlers);

41
}

42
EXPORT_SYMBOL_GPL(edac_handler_set);

43


44
/*

45
 * handler for NMI type of interrupts to assert error

46
 */

47
void edac_atomic_assert_error(void)

48
{

49
	edac_err_assert++;

50
}

51
EXPORT_SYMBOL_GPL(edac_atomic_assert_error);

52


53
/*

54
 * sysfs object: /sys/devices/system/edac

55
 *	need to export to other files

56
 */

57
struct sysdev_class edac_class = {

58
	.name = "edac",

59
};

60
EXPORT_SYMBOL_GPL(edac_class);

61


62
/* return pointer to the 'edac' node in sysfs */

63
struct sysdev_class *edac_get_sysfs_class(void)

64
{

65
	int err = 0;

66


67
	if (atomic_read(&edac_class_valid))

68
		goto out;

69


70
	/* create the /sys/devices/system/edac directory */

71
	err = sysdev_class_register(&edac_class);

72
	if (err) {

73
		printk(KERN_ERR "Error registering toplevel EDAC sysfs dir\n");

74
		return NULL;

75
	}

76


77
out:

78
	atomic_inc(&edac_class_valid);

79
	return &edac_class;

80
}

81
EXPORT_SYMBOL_GPL(edac_get_sysfs_class);

82


83
void edac_put_sysfs_class(void)

84
{

85
	/* last user unregisters it */

86
	if (atomic_dec_and_test(&edac_class_valid))

87
		sysdev_class_unregister(&edac_class);

88
}

89
EXPORT_SYMBOL_GPL(edac_put_sysfs_class);

90


91