/* * (C) 2005, 2006 Linux Networx (http://lnxi.com) * This file may be distributed under the terms of the * GNU General Public License. * * Written Doug Thompson <[email protected]> * */ #include <linux/module.h> #include <linux/edac.h> #include <linux/slab.h> #include <linux/ctype.h> #include "edac_pci.h" #include "edac_module.h" #define EDAC_PCI_SYMLINK … /* data variables exported via sysfs */ static int check_pci_errors; /* default NO check PCI parity */ static int edac_pci_panic_on_pe; /* default NO panic on PCI Parity */ static int edac_pci_log_pe = …; /* log PCI parity errors */ static int edac_pci_log_npe = …; /* log PCI non-parity error errors */ static int edac_pci_poll_msec = …; /* one second workq period */ static atomic_t pci_parity_count = …; static atomic_t pci_nonparity_count = …; static struct kobject *edac_pci_top_main_kobj; static atomic_t edac_pci_sysfs_refcount = …; /* getter functions for the data variables */ int edac_pci_get_check_errors(void) { … } static int edac_pci_get_log_pe(void) { … } static int edac_pci_get_log_npe(void) { … } static int edac_pci_get_panic_on_pe(void) { … } int edac_pci_get_poll_msec(void) { … } /**************************** EDAC PCI sysfs instance *******************/ static ssize_t instance_pe_count_show(struct edac_pci_ctl_info *pci, char *data) { … } static ssize_t instance_npe_count_show(struct edac_pci_ctl_info *pci, char *data) { … } #define to_instance(k) … #define to_instance_attr(a) … /* DEVICE instance kobject release() function */ static void edac_pci_instance_release(struct kobject *kobj) { … } /* instance specific attribute structure */ struct instance_attribute { … }; /* Function to 'show' fields from the edac_pci 'instance' structure */ static ssize_t edac_pci_instance_show(struct kobject *kobj, struct attribute *attr, char *buffer) { … } /* Function to 'store' fields into the edac_pci 'instance' structure */ static ssize_t edac_pci_instance_store(struct kobject *kobj, struct attribute *attr, const char *buffer, size_t count) { … } /* fs_ops table */ static const struct sysfs_ops pci_instance_ops = …; #define INSTANCE_ATTR(_name, _mode, _show, _store) … INSTANCE_ATTR(pe_count, S_IRUGO, instance_pe_count_show, NULL); INSTANCE_ATTR(npe_count, S_IRUGO, instance_npe_count_show, NULL); /* pci instance attributes */ static struct attribute *pci_instance_attrs[] = …; ATTRIBUTE_GROUPS(…); /* the ktype for a pci instance */ static struct kobj_type ktype_pci_instance = …; /* * edac_pci_create_instance_kobj * * construct one EDAC PCI instance's kobject for use */ static int edac_pci_create_instance_kobj(struct edac_pci_ctl_info *pci, int idx) { … } /* * edac_pci_unregister_sysfs_instance_kobj * * unregister the kobj for the EDAC PCI instance */ static void edac_pci_unregister_sysfs_instance_kobj( struct edac_pci_ctl_info *pci) { … } /***************************** EDAC PCI sysfs root **********************/ #define to_edacpci(k) … #define to_edacpci_attr(a) … /* simple show/store functions for attributes */ static ssize_t edac_pci_int_show(void *ptr, char *buffer) { … } static ssize_t edac_pci_int_store(void *ptr, const char *buffer, size_t count) { … } struct edac_pci_dev_attribute { … }; /* Set of show/store abstract level functions for PCI Parity object */ static ssize_t edac_pci_dev_show(struct kobject *kobj, struct attribute *attr, char *buffer) { … } static ssize_t edac_pci_dev_store(struct kobject *kobj, struct attribute *attr, const char *buffer, size_t count) { … } static const struct sysfs_ops edac_pci_sysfs_ops = …; #define EDAC_PCI_ATTR(_name,_mode,_show,_store) … #define EDAC_PCI_STRING_ATTR(_name,_data,_mode,_show,_store) … /* PCI Parity control files */ EDAC_PCI_ATTR(check_pci_errors, S_IRUGO | S_IWUSR, edac_pci_int_show, edac_pci_int_store); EDAC_PCI_ATTR(edac_pci_log_pe, S_IRUGO | S_IWUSR, edac_pci_int_show, edac_pci_int_store); EDAC_PCI_ATTR(edac_pci_log_npe, S_IRUGO | S_IWUSR, edac_pci_int_show, edac_pci_int_store); EDAC_PCI_ATTR(edac_pci_panic_on_pe, S_IRUGO | S_IWUSR, edac_pci_int_show, edac_pci_int_store); EDAC_PCI_ATTR(pci_parity_count, S_IRUGO, edac_pci_int_show, NULL); EDAC_PCI_ATTR(pci_nonparity_count, S_IRUGO, edac_pci_int_show, NULL); /* Base Attributes of the memory ECC object */ static struct attribute *edac_pci_attrs[] = …; ATTRIBUTE_GROUPS(…); /* * edac_pci_release_main_kobj * * This release function is called when the reference count to the * passed kobj goes to zero. * * This kobj is the 'main' kobject that EDAC PCI instances * link to, and thus provide for proper nesting counts */ static void edac_pci_release_main_kobj(struct kobject *kobj) { … } /* ktype struct for the EDAC PCI main kobj */ static struct kobj_type ktype_edac_pci_main_kobj = …; /** * edac_pci_main_kobj_setup: Setup the sysfs for EDAC PCI attributes. */ static int edac_pci_main_kobj_setup(void) { … } /* * edac_pci_main_kobj_teardown() * * if no longer linked (needed) remove the top level EDAC PCI * kobject with its controls and attributes */ static void edac_pci_main_kobj_teardown(void) { … } int edac_pci_create_sysfs(struct edac_pci_ctl_info *pci) { … } void edac_pci_remove_sysfs(struct edac_pci_ctl_info *pci) { … } /************************ PCI error handling *************************/ static u16 get_pci_parity_status(struct pci_dev *dev, int secondary) { … } /* Clear any PCI parity errors logged by this device. */ static void edac_pci_dev_parity_clear(struct pci_dev *dev) { … } /* * PCI Parity polling * * Function to retrieve the current parity status * and decode it * */ static void edac_pci_dev_parity_test(struct pci_dev *dev) { … } /* reduce some complexity in definition of the iterator */ pci_parity_check_fn_t; /* * pci_dev parity list iterator * * Scan the PCI device list looking for SERRORs, Master Parity ERRORS or * Parity ERRORs on primary or secondary devices. */ static inline void edac_pci_dev_parity_iterator(pci_parity_check_fn_t fn) { … } /* * edac_pci_do_parity_check * * performs the actual PCI parity check operation */ void edac_pci_do_parity_check(void) { … } /* * edac_pci_clear_parity_errors * * function to perform an iteration over the PCI devices * and clearn their current status */ void edac_pci_clear_parity_errors(void) { … } /* * edac_pci_handle_pe * * Called to handle a PARITY ERROR event */ void edac_pci_handle_pe(struct edac_pci_ctl_info *pci, const char *msg) { … } EXPORT_SYMBOL_GPL(…); /* * edac_pci_handle_npe * * Called to handle a NON-PARITY ERROR event */ void edac_pci_handle_npe(struct edac_pci_ctl_info *pci, const char *msg) { … } EXPORT_SYMBOL_GPL(…); /* * Define the PCI parameter to the module */ module_param(check_pci_errors, int, 0644); MODULE_PARM_DESC(…) …; module_param(edac_pci_panic_on_pe, int, 0644); MODULE_PARM_DESC(…) …;
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