169 lines · c
1/*2 * edac_module.c3 *4 * (C) 2007 www.softwarebitmaker.com5 *6 * This file is licensed under the terms of the GNU General Public7 * License version 2. This program is licensed "as is" without any8 * warranty of any kind, whether express or implied.9 *10 * Author: Doug Thompson <dougthompson@xmission.com>11 *12 */13#include <linux/edac.h>14 15#include "edac_mc.h"16#include "edac_module.h"17 18#define EDAC_VERSION "Ver: 3.0.0"19 20#ifdef CONFIG_EDAC_DEBUG21 22static int edac_set_debug_level(const char *buf,23 const struct kernel_param *kp)24{25 unsigned long val;26 int ret;27 28 ret = kstrtoul(buf, 0, &val);29 if (ret)30 return ret;31 32 if (val > 4)33 return -EINVAL;34 35 return param_set_int(buf, kp);36}37 38/* Values of 0 to 4 will generate output */39int edac_debug_level = 2;40EXPORT_SYMBOL_GPL(edac_debug_level);41 42module_param_call(edac_debug_level, edac_set_debug_level, param_get_int,43 &edac_debug_level, 0644);44MODULE_PARM_DESC(edac_debug_level, "EDAC debug level: [0-4], default: 2");45#endif46 47/*48 * edac_op_state_to_string()49 */50char *edac_op_state_to_string(int opstate)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 66/*67 * sysfs object: /sys/devices/system/edac68 * need to export to other files69 */70static const struct bus_type edac_subsys = {71 .name = "edac",72 .dev_name = "edac",73};74 75static 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 87static void edac_subsys_exit(void)88{89 bus_unregister(&edac_subsys);90}91 92/* return pointer to the 'edac' node in sysfs */93const struct bus_type *edac_get_sysfs_subsys(void)94{95 return &edac_subsys;96}97EXPORT_SYMBOL_GPL(edac_get_sysfs_subsys);98/*99 * edac_init100 * module initialization entry point101 */102static int __init edac_init(void)103{104 int err = 0;105 106 edac_printk(KERN_INFO, EDAC_MC, EDAC_VERSION "\n");107 108 err = edac_subsys_init();109 if (err)110 return err;111 112 /*113 * Harvest and clear any boot/initialization PCI parity errors114 *115 * FIXME: This only clears errors logged by devices present at time of116 * module initialization. We should also do an initial clear117 * of each newly hotplugged device.118 */119 edac_pci_clear_parity_errors();120 121 err = edac_mc_sysfs_init();122 if (err)123 goto err_sysfs;124 125 edac_debugfs_init();126 127 err = edac_workqueue_setup();128 if (err) {129 edac_printk(KERN_ERR, EDAC_MC, "Failure initializing workqueue\n");130 goto err_wq;131 }132 133 return 0;134 135err_wq:136 edac_debugfs_exit();137 edac_mc_sysfs_exit();138 139err_sysfs:140 edac_subsys_exit();141 142 return err;143}144 145/*146 * edac_exit()147 * module exit/termination function148 */149static void __exit edac_exit(void)150{151 edac_dbg(0, "\n");152 153 /* tear down the various subsystems */154 edac_workqueue_teardown();155 edac_mc_sysfs_exit();156 edac_debugfs_exit();157 edac_subsys_exit();158}159 160/*161 * Inform the kernel of our entry and exit points162 */163subsys_initcall(edac_init);164module_exit(edac_exit);165 166MODULE_LICENSE("GPL");167MODULE_AUTHOR("Doug Thompson www.softwarebitmaker.com, et al");168MODULE_DESCRIPTION("Core library routines for EDAC reporting");169