158 lines
3.1 KiB
C
158 lines
3.1 KiB
C
/*
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* edac_module.c
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*
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* (C) 2007 www.softwarebitmaker.com
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*
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* Author: Doug Thompson <dougthompson@xmission.com>
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*
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*/
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#include <linux/edac.h>
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#include "edac_core.h"
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#include "edac_module.h"
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#define EDAC_VERSION "Ver: 3.0.0"
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#ifdef CONFIG_EDAC_DEBUG
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static int edac_set_debug_level(const char *buf, struct kernel_param *kp)
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{
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unsigned long val;
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int ret;
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ret = kstrtoul(buf, 0, &val);
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if (ret)
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return ret;
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if (val > 4)
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return -EINVAL;
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return param_set_int(buf, kp);
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}
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/* Values of 0 to 4 will generate output */
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int edac_debug_level = 2;
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EXPORT_SYMBOL_GPL(edac_debug_level);
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module_param_call(edac_debug_level, edac_set_debug_level, param_get_int,
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&edac_debug_level, 0644);
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MODULE_PARM_DESC(edac_debug_level, "EDAC debug level: [0-4], default: 2");
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#endif
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/* scope is to module level only */
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struct workqueue_struct *edac_workqueue;
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/*
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* edac_op_state_to_string()
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*/
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char *edac_op_state_to_string(int opstate)
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{
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if (opstate == OP_RUNNING_POLL)
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return "POLLED";
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else if (opstate == OP_RUNNING_INTERRUPT)
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return "INTERRUPT";
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else if (opstate == OP_RUNNING_POLL_INTR)
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return "POLL-INTR";
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else if (opstate == OP_ALLOC)
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return "ALLOC";
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else if (opstate == OP_OFFLINE)
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return "OFFLINE";
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return "UNKNOWN";
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}
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/*
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* edac_workqueue_setup
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* initialize the edac work queue for polling operations
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*/
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static int edac_workqueue_setup(void)
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{
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edac_workqueue = create_singlethread_workqueue("edac-poller");
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if (edac_workqueue == NULL)
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return -ENODEV;
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else
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return 0;
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}
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/*
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* edac_workqueue_teardown
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* teardown the edac workqueue
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*/
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static void edac_workqueue_teardown(void)
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{
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if (edac_workqueue) {
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flush_workqueue(edac_workqueue);
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destroy_workqueue(edac_workqueue);
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edac_workqueue = NULL;
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}
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}
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/*
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* edac_init
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* module initialization entry point
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*/
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static int __init edac_init(void)
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{
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int err = 0;
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edac_printk(KERN_INFO, EDAC_MC, EDAC_VERSION "\n");
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/*
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* Harvest and clear any boot/initialization PCI parity errors
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*
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* FIXME: This only clears errors logged by devices present at time of
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* module initialization. We should also do an initial clear
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* of each newly hotplugged device.
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*/
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edac_pci_clear_parity_errors();
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err = edac_mc_sysfs_init();
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if (err)
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goto err_sysfs;
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edac_debugfs_init();
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err = edac_workqueue_setup();
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if (err) {
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edac_printk(KERN_ERR, EDAC_MC, "Failure initializing workqueue\n");
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goto err_wq;
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}
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return 0;
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err_wq:
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edac_debugfs_exit();
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edac_mc_sysfs_exit();
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err_sysfs:
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return err;
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}
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/*
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* edac_exit()
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* module exit/termination function
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*/
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static void __exit edac_exit(void)
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{
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edac_dbg(0, "\n");
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/* tear down the various subsystems */
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edac_workqueue_teardown();
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edac_mc_sysfs_exit();
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edac_debugfs_exit();
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}
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/*
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* Inform the kernel of our entry and exit points
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*/
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subsys_initcall(edac_init);
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module_exit(edac_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Doug Thompson www.softwarebitmaker.com, et al");
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MODULE_DESCRIPTION("Core library routines for EDAC reporting");
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