ras.c

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Copyright (C) 2014 Intel Corporation
  4 *
  5 * Authors:
  6 *	Chen, Gong <gong.chen@linux.intel.com>
  7 */
  8
  9#include <linux/init.h>
 10#include <linux/ras.h>
 11#include <linux/uuid.h>
 12
 13#if IS_ENABLED(CONFIG_AMD_ATL)
 14/*
 15 * Once set, this function pointer should never be unset.
 16 *
 17 * The library module will set this pointer if it successfully loads. The module
 18 * should not be unloaded except for testing and debug purposes.
 19 */
 20static unsigned long (*amd_atl_umc_na_to_spa)(struct atl_err *err);
 21
 22void amd_atl_register_decoder(unsigned long (*f)(struct atl_err *))
 23{
 24	amd_atl_umc_na_to_spa = f;
 25}
 26EXPORT_SYMBOL_GPL(amd_atl_register_decoder);
 27
 28void amd_atl_unregister_decoder(void)
 29{
 30	amd_atl_umc_na_to_spa = NULL;
 31}
 32EXPORT_SYMBOL_GPL(amd_atl_unregister_decoder);
 33
 34unsigned long amd_convert_umc_mca_addr_to_sys_addr(struct atl_err *err)
 35{
 36	if (!amd_atl_umc_na_to_spa)
 37		return -EINVAL;
 38
 39	return amd_atl_umc_na_to_spa(err);
 40}
 41EXPORT_SYMBOL_GPL(amd_convert_umc_mca_addr_to_sys_addr);
 42#endif /* CONFIG_AMD_ATL */
 43
 44#define CREATE_TRACE_POINTS
 45#define TRACE_INCLUDE_PATH ../../include/ras
 46#include <ras/ras_event.h>
 47
 48void log_non_standard_event(const guid_t *sec_type, const guid_t *fru_id,
 49			    const char *fru_text, const u8 sev, const u8 *err,
 50			    const u32 len)
 51{
 52	trace_non_standard_event(sec_type, fru_id, fru_text, sev, err, len);
 53}
 54EXPORT_SYMBOL_GPL(log_non_standard_event);
 55
 56void log_arm_hw_error(struct cper_sec_proc_arm *err, const u8 sev)
 57{
 58	struct cper_arm_err_info *err_info;
 59	struct cper_arm_ctx_info *ctx_info;
 60	u8 *ven_err_data;
 61	u32 ctx_len = 0;
 62	int n, sz, cpu;
 63	s32 vsei_len;
 64	u32 pei_len;
 65	u8 *pei_err, *ctx_err;
 66
 67	pei_len = sizeof(struct cper_arm_err_info) * err->err_info_num;
 68	pei_err = (u8 *)(err + 1);
 69
 70	err_info = (struct cper_arm_err_info *)(err + 1);
 71	ctx_info = (struct cper_arm_ctx_info *)(err_info + err->err_info_num);
 72	ctx_err = (u8 *)ctx_info;
 73
 74	for (n = 0; n < err->context_info_num; n++) {
 75		sz = sizeof(struct cper_arm_ctx_info);
 76
 77		if (sz + (long)ctx_info - (long)err >= err->section_length)
 78			sz += ctx_info->size;
 79
 80		ctx_info = (struct cper_arm_ctx_info *)((long)ctx_info + sz);
 81		ctx_len += sz;
 82	}
 83
 84	vsei_len = err->section_length - (sizeof(struct cper_sec_proc_arm) + pei_len + ctx_len);
 85	if (vsei_len < 0) {
 86		pr_warn(FW_BUG "section length: %d\n", err->section_length);
 87		pr_warn(FW_BUG "section length is too small\n");
 88		pr_warn(FW_BUG "firmware-generated error record is incorrect\n");
 89		vsei_len = 0;
 90	}
 91	ven_err_data = (u8 *)ctx_info;
 92
 93	cpu = GET_LOGICAL_INDEX(err->mpidr);
 94	if (cpu < 0)
 95		cpu = -1;
 96
 97	trace_arm_event(err, pei_err, pei_len, ctx_err, ctx_len,
 98			ven_err_data, (u32)vsei_len, sev, cpu);
 99}
100
101static int __init ras_init(void)
102{
103	int rc = 0;
104
105	ras_debugfs_init();
106	rc = ras_add_daemon_trace();
107
108	return rc;
109}
110subsys_initcall(ras_init);
111
112#if defined(CONFIG_ACPI_EXTLOG) || defined(CONFIG_ACPI_EXTLOG_MODULE)
113EXPORT_TRACEPOINT_SYMBOL_GPL(extlog_mem_event);
114#endif
115EXPORT_TRACEPOINT_SYMBOL_GPL(mc_event);
116EXPORT_TRACEPOINT_SYMBOL_GPL(non_standard_event);
117EXPORT_TRACEPOINT_SYMBOL_GPL(arm_event);
118
119static int __init parse_ras_param(char *str)
120{
121#ifdef CONFIG_RAS_CEC
122	parse_cec_param(str);
123#endif
124
125	return 1;
126}
127__setup("ras", parse_ras_param);