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: 2.1.0" 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 /* 94 * now set up the mc_kset under the edac class object 95 */ 96 err = edac_sysfs_setup_mc_kset(); 97 if (err) 98 goto error; 99 100 /* Setup/Initialize the workq for this core */ 101 err = edac_workqueue_setup(); 102 if (err) { 103 edac_printk(KERN_ERR, EDAC_MC, "init WorkQueue failure\n"); 104 goto workq_fail; 105 } 106 107 return 0; 108 109 /* Error teardown stack */ 110 workq_fail: 111 edac_sysfs_teardown_mc_kset(); 112 113 error: 114 return err; 115 } 116 117 /* 118 * edac_exit() 119 * module exit/termination function 120 */ 121 static void __exit edac_exit(void) 122 { 123 debugf0("%s()\n", __func__); 124 125 /* tear down the various subsystems */ 126 edac_workqueue_teardown(); 127 edac_sysfs_teardown_mc_kset(); 128 } 129 130 /* 131 * Inform the kernel of our entry and exit points 132 */ 133 module_init(edac_init); 134 module_exit(edac_exit); 135 136 MODULE_LICENSE("GPL"); 137 MODULE_AUTHOR("Doug Thompson www.softwarebitmaker.com, et al"); 138 MODULE_DESCRIPTION("Core library routines for EDAC reporting"); 139 140 /* refer to *_sysfs.c files for parameters that are exported via sysfs */ 141 142 #ifdef CONFIG_EDAC_DEBUG 143 module_param(edac_debug_level, int, 0644); 144 MODULE_PARM_DESC(edac_debug_level, "Debug level"); 145 #endif 146