/* SPDX-License-Identifier: GPL-2.0 */ /* Copyright(c) 2023 Intel Corporation. */ #ifndef _LINUX_CXL_EVENT_H #define _LINUX_CXL_EVENT_H #include #include #include /* * Common Event Record Format * CXL rev 3.0 section 8.2.9.2.1; Table 8-42 */ struct cxl_event_record_hdr { u8 length; u8 flags[3]; __le16 handle; __le16 related_handle; __le64 timestamp; u8 maint_op_class; u8 reserved[15]; } __packed; struct cxl_event_media_hdr { struct cxl_event_record_hdr hdr; __le64 phys_addr; u8 descriptor; u8 type; u8 transaction_type; /* * The meaning of Validity Flags from bit 2 is * different across DRAM and General Media records */ u8 validity_flags[2]; u8 channel; u8 rank; } __packed; #define CXL_EVENT_RECORD_DATA_LENGTH 0x50 struct cxl_event_generic { struct cxl_event_record_hdr hdr; u8 data[CXL_EVENT_RECORD_DATA_LENGTH]; } __packed; /* * General Media Event Record * CXL rev 3.0 Section 8.2.9.2.1.1; Table 8-43 */ #define CXL_EVENT_GEN_MED_COMP_ID_SIZE 0x10 struct cxl_event_gen_media { struct cxl_event_media_hdr media_hdr; u8 device[3]; u8 component_id[CXL_EVENT_GEN_MED_COMP_ID_SIZE]; u8 reserved[46]; } __packed; /* * DRAM Event Record - DER * CXL rev 3.0 section 8.2.9.2.1.2; Table 3-44 */ #define CXL_EVENT_DER_CORRECTION_MASK_SIZE 0x20 struct cxl_event_dram { struct cxl_event_media_hdr media_hdr; u8 nibble_mask[3]; u8 bank_group; u8 bank; u8 row[3]; u8 column[2]; u8 correction_mask[CXL_EVENT_DER_CORRECTION_MASK_SIZE]; u8 reserved[0x17]; } __packed; /* * Get Health Info Record * CXL rev 3.0 section 8.2.9.8.3.1; Table 8-100 */ struct cxl_get_health_info { u8 health_status; u8 media_status; u8 add_status; u8 life_used; u8 device_temp[2]; u8 dirty_shutdown_cnt[4]; u8 cor_vol_err_cnt[4]; u8 cor_per_err_cnt[4]; } __packed; /* * Memory Module Event Record * CXL rev 3.0 section 8.2.9.2.1.3; Table 8-45 */ struct cxl_event_mem_module { struct cxl_event_record_hdr hdr; u8 event_type; struct cxl_get_health_info info; u8 reserved[0x3d]; } __packed; union cxl_event { struct cxl_event_generic generic; struct cxl_event_gen_media gen_media; struct cxl_event_dram dram; struct cxl_event_mem_module mem_module; /* dram & gen_media event header */ struct cxl_event_media_hdr media_hdr; } __packed; /* * Common Event Record Format; in event logs * CXL rev 3.0 section 8.2.9.2.1; Table 8-42 */ struct cxl_event_record_raw { uuid_t id; union cxl_event event; } __packed; enum cxl_event_type { CXL_CPER_EVENT_GENERIC, CXL_CPER_EVENT_GEN_MEDIA, CXL_CPER_EVENT_DRAM, CXL_CPER_EVENT_MEM_MODULE, }; #define CPER_CXL_DEVICE_ID_VALID BIT(0) #define CPER_CXL_DEVICE_SN_VALID BIT(1) #define CPER_CXL_COMP_EVENT_LOG_VALID BIT(2) struct cxl_cper_event_rec { struct { u32 length; u64 validation_bits; struct cper_cxl_event_devid { u16 vendor_id; u16 device_id; u8 func_num; u8 device_num; u8 bus_num; u16 segment_num; u16 slot_num; /* bits 2:0 reserved */ u8 reserved; } __packed device_id; struct cper_cxl_event_sn { u32 lower_dw; u32 upper_dw; } __packed dev_serial_num; } __packed hdr; union cxl_event event; } __packed; struct cxl_cper_work_data { enum cxl_event_type event_type; struct cxl_cper_event_rec rec; }; #ifdef CONFIG_ACPI_APEI_GHES int cxl_cper_register_work(struct work_struct *work); int cxl_cper_unregister_work(struct work_struct *work); int cxl_cper_kfifo_get(struct cxl_cper_work_data *wd); #else static inline int cxl_cper_register_work(struct work_struct *work) { return 0; } static inline int cxl_cper_unregister_work(struct work_struct *work) { return 0; } static inline int cxl_cper_kfifo_get(struct cxl_cper_work_data *wd) { return 0; } #endif #endif /* _LINUX_CXL_EVENT_H */