1 /* 2 * edac_module.c 3 * 4 * (C) 2007 www.softwarebitmaker.com 5 * 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 * 10 * Author: Doug Thompson <dougthompson@xmission.com> 11 * 12 */ 13 #include <linux/edac.h> 14 15 #include "edac_core.h" 16 #include "edac_module.h" 17 18 #define EDAC_VERSION "Ver: 3.0.0" 19 20 #ifdef CONFIG_EDAC_DEBUG 21 /* Values of 0 to 4 will generate output */ 22 int edac_debug_level = 2; 23 EXPORT_SYMBOL_GPL(edac_debug_level); 24 #endif 25 26 /* scope is to module level only */ 27 struct workqueue_struct *edac_workqueue; 28 29 /* 30 * edac_op_state_to_string() 31 */ 32 char *edac_op_state_to_string(int opstate) 33 { 34 if (opstate == OP_RUNNING_POLL) 35 return "POLLED"; 36 else if (opstate == OP_RUNNING_INTERRUPT) 37 return "INTERRUPT"; 38 else if (opstate == OP_RUNNING_POLL_INTR) 39 return "POLL-INTR"; 40 else if (opstate == OP_ALLOC) 41 return "ALLOC"; 42 else if (opstate == OP_OFFLINE) 43 return "OFFLINE"; 44 45 return "UNKNOWN"; 46 } 47 48 /* 49 * edac_workqueue_setup 50 * initialize the edac work queue for polling operations 51 */ 52 static int edac_workqueue_setup(void) 53 { 54 edac_workqueue = create_singlethread_workqueue("edac-poller"); 55 if (edac_workqueue == NULL) 56 return -ENODEV; 57 else 58 return 0; 59 } 60 61 /* 62 * edac_workqueue_teardown 63 * teardown the edac workqueue 64 */ 65 static void edac_workqueue_teardown(void) 66 { 67 if (edac_workqueue) { 68 flush_workqueue(edac_workqueue); 69 destroy_workqueue(edac_workqueue); 70 edac_workqueue = NULL; 71 } 72 } 73 74 /* 75 * edac_init 76 * module initialization entry point 77 */ 78 static int __init edac_init(void) 79 { 80 int err = 0; 81 82 edac_printk(KERN_INFO, EDAC_MC, EDAC_VERSION "\n"); 83 84 /* 85 * Harvest and clear any boot/initialization PCI parity errors 86 * 87 * FIXME: This only clears errors logged by devices present at time of 88 * module initialization. We should also do an initial clear 89 * of each newly hotplugged device. 90 */ 91 edac_pci_clear_parity_errors(); 92 93 err = edac_mc_sysfs_init(); 94 if (err) 95 goto error; 96 97 edac_debugfs_init(); 98 99 /* Setup/Initialize the workq for this core */ 100 err = edac_workqueue_setup(); 101 if (err) { 102 edac_printk(KERN_ERR, EDAC_MC, "init WorkQueue failure\n"); 103 goto error; 104 } 105 106 return 0; 107 108 error: 109 return err; 110 } 111 112 /* 113 * edac_exit() 114 * module exit/termination function 115 */ 116 static void __exit edac_exit(void) 117 { 118 edac_dbg(0, "\n"); 119 120 /* tear down the various subsystems */ 121 edac_workqueue_teardown(); 122 edac_mc_sysfs_exit(); 123 edac_debugfs_exit(); 124 } 125 126 /* 127 * Inform the kernel of our entry and exit points 128 */ 129 module_init(edac_init); 130 module_exit(edac_exit); 131 132 MODULE_LICENSE("GPL"); 133 MODULE_AUTHOR("Doug Thompson www.softwarebitmaker.com, et al"); 134 MODULE_DESCRIPTION("Core library routines for EDAC reporting"); 135 136 /* refer to *_sysfs.c files for parameters that are exported via sysfs */ 137 138 #ifdef CONFIG_EDAC_DEBUG 139 module_param(edac_debug_level, int, 0644); 140 MODULE_PARM_DESC(edac_debug_level, "Debug level"); 141 #endif 142