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9057a3f7ac
To make ghes_edac a proper module, prepare to decouple its dependencies from GHES. Move the ghes_edac.force_load parameter to ghes.c in order to properly control whether ghes_edac should be force-loaded: In ghes_edac_register() it is too late to set the module flag. Introduce a helper ghes_get_devices(), which returns the list of GHES devices which got probed when the platform-check passes on the system. The previous force_load check is not needed in ghes_edac_unregister() since it will be checked in the module's init function of ghes_edac later. [ bp: Massage. ] Suggested-by: Toshi Kani <toshi.kani@hpe.com> Suggested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Jia He <justin.he@arm.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lore.kernel.org/r/20221010023559.69655-4-justin.he@arm.com
151 lines
3.7 KiB
C
151 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef GHES_H
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#define GHES_H
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#include <acpi/apei.h>
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#include <acpi/hed.h>
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/*
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* One struct ghes is created for each generic hardware error source.
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* It provides the context for APEI hardware error timer/IRQ/SCI/NMI
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* handler.
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*
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* estatus: memory buffer for error status block, allocated during
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* HEST parsing.
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*/
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#define GHES_EXITING 0x0002
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struct ghes {
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union {
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struct acpi_hest_generic *generic;
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struct acpi_hest_generic_v2 *generic_v2;
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};
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struct acpi_hest_generic_status *estatus;
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unsigned long flags;
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union {
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struct list_head list;
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struct timer_list timer;
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unsigned int irq;
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};
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struct device *dev;
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struct list_head elist;
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};
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struct ghes_estatus_node {
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struct llist_node llnode;
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struct acpi_hest_generic *generic;
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struct ghes *ghes;
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int task_work_cpu;
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struct callback_head task_work;
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};
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struct ghes_estatus_cache {
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u32 estatus_len;
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atomic_t count;
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struct acpi_hest_generic *generic;
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unsigned long long time_in;
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struct rcu_head rcu;
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};
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enum {
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GHES_SEV_NO = 0x0,
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GHES_SEV_CORRECTED = 0x1,
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GHES_SEV_RECOVERABLE = 0x2,
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GHES_SEV_PANIC = 0x3,
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};
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#ifdef CONFIG_ACPI_APEI_GHES
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/**
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* ghes_register_vendor_record_notifier - register a notifier for vendor
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* records that the kernel would otherwise ignore.
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* @nb: pointer to the notifier_block structure of the event handler.
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*
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* return 0 : SUCCESS, non-zero : FAIL
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*/
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int ghes_register_vendor_record_notifier(struct notifier_block *nb);
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/**
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* ghes_unregister_vendor_record_notifier - unregister the previously
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* registered vendor record notifier.
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* @nb: pointer to the notifier_block structure of the vendor record handler.
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*/
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void ghes_unregister_vendor_record_notifier(struct notifier_block *nb);
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#endif
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int ghes_estatus_pool_init(int num_ghes);
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/* From drivers/edac/ghes_edac.c */
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#ifdef CONFIG_EDAC_GHES
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int ghes_edac_register(struct ghes *ghes, struct device *dev);
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void ghes_edac_unregister(struct ghes *ghes);
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struct list_head *ghes_get_devices(void);
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#else
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static inline int ghes_edac_register(struct ghes *ghes, struct device *dev)
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{
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return -ENODEV;
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}
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static inline void ghes_edac_unregister(struct ghes *ghes)
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{
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}
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static inline struct list_head *ghes_get_devices(void) { return NULL; }
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#endif
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static inline int acpi_hest_get_version(struct acpi_hest_generic_data *gdata)
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{
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return gdata->revision >> 8;
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}
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static inline void *acpi_hest_get_payload(struct acpi_hest_generic_data *gdata)
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{
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if (acpi_hest_get_version(gdata) >= 3)
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return (void *)(((struct acpi_hest_generic_data_v300 *)(gdata)) + 1);
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return gdata + 1;
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}
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static inline int acpi_hest_get_error_length(struct acpi_hest_generic_data *gdata)
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{
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return ((struct acpi_hest_generic_data *)(gdata))->error_data_length;
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}
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static inline int acpi_hest_get_size(struct acpi_hest_generic_data *gdata)
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{
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if (acpi_hest_get_version(gdata) >= 3)
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return sizeof(struct acpi_hest_generic_data_v300);
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return sizeof(struct acpi_hest_generic_data);
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}
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static inline int acpi_hest_get_record_size(struct acpi_hest_generic_data *gdata)
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{
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return (acpi_hest_get_size(gdata) + acpi_hest_get_error_length(gdata));
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}
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static inline void *acpi_hest_get_next(struct acpi_hest_generic_data *gdata)
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{
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return (void *)(gdata) + acpi_hest_get_record_size(gdata);
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}
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#define apei_estatus_for_each_section(estatus, section) \
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for (section = (struct acpi_hest_generic_data *)(estatus + 1); \
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(void *)section - (void *)(estatus + 1) < estatus->data_length; \
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section = acpi_hest_get_next(section))
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#ifdef CONFIG_ACPI_APEI_SEA
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int ghes_notify_sea(void);
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#else
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static inline int ghes_notify_sea(void) { return -ENOENT; }
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#endif
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struct notifier_block;
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extern void ghes_register_report_chain(struct notifier_block *nb);
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extern void ghes_unregister_report_chain(struct notifier_block *nb);
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#endif /* GHES_H */
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