[linux-block.git] / drivers / edac / edac_module.c

/*
 * edac_module.c
 *
 * (C) 2007 www.softwarebitmaker.com
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2. This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 *
 * Author: Doug Thompson <dougthompson@xmission.com>
 *
 */
#include <linux/edac.h>

#include "edac_mc.h"
#include "edac_module.h"

#define EDAC_VERSION "Ver: 3.0.0"

#ifdef CONFIG_EDAC_DEBUG

static int edac_set_debug_level(const char *buf,
				const struct kernel_param *kp)
{
	unsigned long val;
	int ret;

	ret = kstrtoul(buf, 0, &val);
	if (ret)
		return ret;

	if (val > 4)
		return -EINVAL;

	return param_set_int(buf, kp);
}

/* Values of 0 to 4 will generate output */
int edac_debug_level = 2;
EXPORT_SYMBOL_GPL(edac_debug_level);

module_param_call(edac_debug_level, edac_set_debug_level, param_get_int,
		  &edac_debug_level, 0644);
MODULE_PARM_DESC(edac_debug_level, "EDAC debug level: [0-4], default: 2");
#endif

/*
 * edac_op_state_to_string()
 */
char *edac_op_state_to_string(int opstate)
{
	if (opstate == OP_RUNNING_POLL)
		return "POLLED";
	else if (opstate == OP_RUNNING_INTERRUPT)
		return "INTERRUPT";
	else if (opstate == OP_RUNNING_POLL_INTR)
		return "POLL-INTR";
	else if (opstate == OP_ALLOC)
		return "ALLOC";
	else if (opstate == OP_OFFLINE)
		return "OFFLINE";

	return "UNKNOWN";
}

/*
 * sysfs object: /sys/devices/system/edac
 *	need to export to other files
 */
static struct bus_type edac_subsys = {
	.name = "edac",
	.dev_name = "edac",
};

static int edac_subsys_init(void)
{
	int err;

	/* create the /sys/devices/system/edac directory */
	err = subsys_system_register(&edac_subsys, NULL);
	if (err)
		printk(KERN_ERR "Error registering toplevel EDAC sysfs dir\n");

	return err;
}

static void edac_subsys_exit(void)
{
	bus_unregister(&edac_subsys);
}

/* return pointer to the 'edac' node in sysfs */
struct bus_type *edac_get_sysfs_subsys(void)
{
	return &edac_subsys;
}
EXPORT_SYMBOL_GPL(edac_get_sysfs_subsys);
/*
 * edac_init
 *      module initialization entry point
 */
static int __init edac_init(void)
{
	int err = 0;

	edac_printk(KERN_INFO, EDAC_MC, EDAC_VERSION "\n");

	err = edac_subsys_init();
	if (err)
		return err;

	/*
	 * Harvest and clear any boot/initialization PCI parity errors
	 *
	 * FIXME: This only clears errors logged by devices present at time of
	 *      module initialization.  We should also do an initial clear
	 *      of each newly hotplugged device.
	 */
	edac_pci_clear_parity_errors();

	err = edac_mc_sysfs_init();
	if (err)
		goto err_sysfs;

	edac_debugfs_init();

	err = edac_workqueue_setup();
	if (err) {
		edac_printk(KERN_ERR, EDAC_MC, "Failure initializing workqueue\n");
		goto err_wq;
	}

	return 0;

err_wq:
	edac_debugfs_exit();
	edac_mc_sysfs_exit();

err_sysfs:
	edac_subsys_exit();

	return err;
}

/*
 * edac_exit()
 *      module exit/termination function
 */
static void __exit edac_exit(void)
{
	edac_dbg(0, "\n");

	/* tear down the various subsystems */
	edac_workqueue_teardown();
	edac_mc_sysfs_exit();
	edac_debugfs_exit();
	edac_subsys_exit();
}

/*
 * Inform the kernel of our entry and exit points
 */
subsys_initcall(edac_init);
module_exit(edac_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Doug Thompson www.softwarebitmaker.com, et al");
MODULE_DESCRIPTION("Core library routines for EDAC reporting");
Commit	Line	Data
81d87cb1 DJ	1	/*
	2	* edac_module.c
	3	*
fb3fb206 DT	4	* (C) 2007 www.softwarebitmaker.com
fb3fb206 DT	5	*
81d87cb1 DJ	6	* This file is licensed under the terms of the GNU General Public
	7	* License version 2. This program is licensed "as is" without any
	8	* warranty of any kind, whether express or implied.
	9	*
fb3fb206	10	* Author: Doug Thompson <dougthompson@xmission.com>
81d87cb1 DJ	11	*
81d87cb1 DJ	12	*/
c0d12172	13	#include <linux/edac.h>
7c9281d7	14
78d88e8a	15	#include "edac_mc.h"
7c9281d7 DT	16	#include "edac_module.h"
7c9281d7 DT	17
5156a5f4	18	#define EDAC_VERSION "Ver: 3.0.0"
7c9281d7 DT	19
7c9281d7 DT	20	#ifdef CONFIG_EDAC_DEBUG
37929874	21
e4dca7b7 KC	22	static int edac_set_debug_level(const char *buf,
e4dca7b7 KC	23	const struct kernel_param *kp)
37929874 BP	24	{
	25	unsigned long val;
	26	int ret;
	27
	28	ret = kstrtoul(buf, 0, &val);
	29	if (ret)
	30	return ret;
	31
6866b390	32	if (val > 4)
37929874 BP	33	return -EINVAL;
	34
	35	return param_set_int(buf, kp);
	36	}
	37
7c9281d7	38	/* Values of 0 to 4 will generate output */
8096cfaf	39	int edac_debug_level = 2;
7c9281d7	40	EXPORT_SYMBOL_GPL(edac_debug_level);
37929874 BP	41
	42	module_param_call(edac_debug_level, edac_set_debug_level, param_get_int,
	43	&edac_debug_level, 0644);
	44	MODULE_PARM_DESC(edac_debug_level, "EDAC debug level: [0-4], default: 2");
7c9281d7 DT	45	#endif
7c9281d7 DT	46
91b99041	47	/*
494d0d55	48	* edac_op_state_to_string()
91b99041	49	*/
494d0d55	50	char *edac_op_state_to_string(int opstate)
91b99041 DJ	51	{
	52	if (opstate == OP_RUNNING_POLL)
	53	return "POLLED";
	54	else if (opstate == OP_RUNNING_INTERRUPT)
	55	return "INTERRUPT";
	56	else if (opstate == OP_RUNNING_POLL_INTR)
	57	return "POLL-INTR";
	58	else if (opstate == OP_ALLOC)
	59	return "ALLOC";
	60	else if (opstate == OP_OFFLINE)
	61	return "OFFLINE";
	62
	63	return "UNKNOWN";
	64	}
	65
733476cf BP	66	/*
	67	* sysfs object: /sys/devices/system/edac
	68	* need to export to other files
	69	*/
a97d2627	70	static struct bus_type edac_subsys = {
733476cf BP	71	.name = "edac",
	72	.dev_name = "edac",
	73	};
733476cf BP	74
	75	static int edac_subsys_init(void)
	76	{
	77	int err;
	78
	79	/* create the /sys/devices/system/edac directory */
	80	err = subsys_system_register(&edac_subsys, NULL);
	81	if (err)
	82	printk(KERN_ERR "Error registering toplevel EDAC sysfs dir\n");
	83
	84	return err;
	85	}
	86
	87	static void edac_subsys_exit(void)
	88	{
	89	bus_unregister(&edac_subsys);
	90	}
	91
	92	/* return pointer to the 'edac' node in sysfs */
	93	struct bus_type *edac_get_sysfs_subsys(void)
	94	{
	95	return &edac_subsys;
	96	}
	97	EXPORT_SYMBOL_GPL(edac_get_sysfs_subsys);
7c9281d7 DT	98	/*
	99	* edac_init
	100	* module initialization entry point
	101	*/
	102	static int __init edac_init(void)
	103	{
e27e3dac DT	104	int err = 0;
e27e3dac DT	105
fb3fb206	106	edac_printk(KERN_INFO, EDAC_MC, EDAC_VERSION "\n");
7c9281d7	107
733476cf BP	108	err = edac_subsys_init();
	109	if (err)
	110	return err;
	111
7c9281d7 DT	112	/*
	113	* Harvest and clear any boot/initialization PCI parity errors
	114	*
	115	* FIXME: This only clears errors logged by devices present at time of
079708b9 DT	116	* module initialization. We should also do an initial clear
079708b9 DT	117	* of each newly hotplugged device.
7c9281d7 DT	118	*/
	119	edac_pci_clear_parity_errors();
	120
7a623c03	121	err = edac_mc_sysfs_init();
8096cfaf	122	if (err)
c6b97bcf	123	goto err_sysfs;
7c9281d7	124
e7930ba4 RH	125	edac_debugfs_init();
e7930ba4 RH	126
e27e3dac DT	127	err = edac_workqueue_setup();
e27e3dac DT	128	if (err) {
c6b97bcf AK	129	edac_printk(KERN_ERR, EDAC_MC, "Failure initializing workqueue\n");
c6b97bcf AK	130	goto err_wq;
7c9281d7 DT	131	}
7c9281d7 DT	132
7c9281d7	133	return 0;
e27e3dac	134
c6b97bcf AK	135	err_wq:
	136	edac_debugfs_exit();
	137	edac_mc_sysfs_exit();
	138
	139	err_sysfs:
733476cf BP	140	edac_subsys_exit();
733476cf BP	141
e27e3dac	142	return err;
7c9281d7 DT	143	}
	144
	145	/*
	146	* edac_exit()
	147	* module exit/termination function
	148	*/
	149	static void __exit edac_exit(void)
	150	{
956b9ba1	151	edac_dbg(0, "\n");
7c9281d7	152
079708b9	153	/* tear down the various subsystems */
e27e3dac	154	edac_workqueue_teardown();
7a623c03	155	edac_mc_sysfs_exit();
e7930ba4	156	edac_debugfs_exit();
733476cf	157	edac_subsys_exit();
7c9281d7 DT	158	}
	159
	160	/*
	161	* Inform the kernel of our entry and exit points
	162	*/
4ab19b06	163	subsys_initcall(edac_init);
7c9281d7 DT	164	module_exit(edac_exit);
	165
	166	MODULE_LICENSE("GPL");
	167	MODULE_AUTHOR("Doug Thompson www.softwarebitmaker.com, et al");
	168	MODULE_DESCRIPTION("Core library routines for EDAC reporting");