fadump-internal.h (4370B)
1/* SPDX-License-Identifier: GPL-2.0-or-later */ 2/* 3 * Firmware-Assisted Dump internal code. 4 * 5 * Copyright 2011, Mahesh Salgaonkar, IBM Corporation. 6 * Copyright 2019, Hari Bathini, IBM Corporation. 7 */ 8 9#ifndef _ASM_POWERPC_FADUMP_INTERNAL_H 10#define _ASM_POWERPC_FADUMP_INTERNAL_H 11 12/* Maximum number of memory regions kernel supports */ 13#define FADUMP_MAX_MEM_REGS 128 14 15#ifndef CONFIG_PRESERVE_FA_DUMP 16 17/* The upper limit percentage for user specified boot memory size (25%) */ 18#define MAX_BOOT_MEM_RATIO 4 19 20#define memblock_num_regions(memblock_type) (memblock.memblock_type.cnt) 21 22/* FAD commands */ 23#define FADUMP_REGISTER 1 24#define FADUMP_UNREGISTER 2 25#define FADUMP_INVALIDATE 3 26 27/* 28 * Copy the ascii values for first 8 characters from a string into u64 29 * variable at their respective indexes. 30 * e.g. 31 * The string "FADMPINF" will be converted into 0x4641444d50494e46 32 */ 33static inline u64 fadump_str_to_u64(const char *str) 34{ 35 u64 val = 0; 36 int i; 37 38 for (i = 0; i < sizeof(val); i++) 39 val = (*str) ? (val << 8) | *str++ : val << 8; 40 return val; 41} 42 43#define FADUMP_CPU_UNKNOWN (~((u32)0)) 44 45#define FADUMP_CRASH_INFO_MAGIC fadump_str_to_u64("FADMPINF") 46 47/* fadump crash info structure */ 48struct fadump_crash_info_header { 49 u64 magic_number; 50 u64 elfcorehdr_addr; 51 u32 crashing_cpu; 52 struct pt_regs regs; 53 struct cpumask cpu_mask; 54}; 55 56struct fadump_memory_range { 57 u64 base; 58 u64 size; 59}; 60 61/* fadump memory ranges info */ 62#define RNG_NAME_SZ 16 63struct fadump_mrange_info { 64 char name[RNG_NAME_SZ]; 65 struct fadump_memory_range *mem_ranges; 66 u32 mem_ranges_sz; 67 u32 mem_range_cnt; 68 u32 max_mem_ranges; 69 bool is_static; 70}; 71 72/* Platform specific callback functions */ 73struct fadump_ops; 74 75/* Firmware-assisted dump configuration details. */ 76struct fw_dump { 77 unsigned long reserve_dump_area_start; 78 unsigned long reserve_dump_area_size; 79 /* cmd line option during boot */ 80 unsigned long reserve_bootvar; 81 82 unsigned long cpu_state_data_size; 83 u64 cpu_state_dest_vaddr; 84 u32 cpu_state_data_version; 85 u32 cpu_state_entry_size; 86 87 unsigned long hpte_region_size; 88 89 unsigned long boot_memory_size; 90 u64 boot_mem_dest_addr; 91 u64 boot_mem_addr[FADUMP_MAX_MEM_REGS]; 92 u64 boot_mem_sz[FADUMP_MAX_MEM_REGS]; 93 u64 boot_mem_top; 94 u64 boot_mem_regs_cnt; 95 96 unsigned long fadumphdr_addr; 97 unsigned long cpu_notes_buf_vaddr; 98 unsigned long cpu_notes_buf_size; 99 100 /* 101 * Maximum size supported by firmware to copy from source to 102 * destination address per entry. 103 */ 104 u64 max_copy_size; 105 u64 kernel_metadata; 106 107 int ibm_configure_kernel_dump; 108 109 unsigned long fadump_enabled:1; 110 unsigned long fadump_supported:1; 111 unsigned long dump_active:1; 112 unsigned long dump_registered:1; 113 unsigned long nocma:1; 114 115 struct fadump_ops *ops; 116}; 117 118struct fadump_ops { 119 u64 (*fadump_init_mem_struct)(struct fw_dump *fadump_conf); 120 u64 (*fadump_get_metadata_size)(void); 121 int (*fadump_setup_metadata)(struct fw_dump *fadump_conf); 122 u64 (*fadump_get_bootmem_min)(void); 123 int (*fadump_register)(struct fw_dump *fadump_conf); 124 int (*fadump_unregister)(struct fw_dump *fadump_conf); 125 int (*fadump_invalidate)(struct fw_dump *fadump_conf); 126 void (*fadump_cleanup)(struct fw_dump *fadump_conf); 127 int (*fadump_process)(struct fw_dump *fadump_conf); 128 void (*fadump_region_show)(struct fw_dump *fadump_conf, 129 struct seq_file *m); 130 void (*fadump_trigger)(struct fadump_crash_info_header *fdh, 131 const char *msg); 132}; 133 134/* Helper functions */ 135s32 __init fadump_setup_cpu_notes_buf(u32 num_cpus); 136void fadump_free_cpu_notes_buf(void); 137u32 *__init fadump_regs_to_elf_notes(u32 *buf, struct pt_regs *regs); 138void __init fadump_update_elfcore_header(char *bufp); 139bool is_fadump_boot_mem_contiguous(void); 140bool is_fadump_reserved_mem_contiguous(void); 141 142#else /* !CONFIG_PRESERVE_FA_DUMP */ 143 144/* Firmware-assisted dump configuration details. */ 145struct fw_dump { 146 u64 boot_mem_top; 147 u64 dump_active; 148}; 149 150#endif /* CONFIG_PRESERVE_FA_DUMP */ 151 152#ifdef CONFIG_PPC_PSERIES 153extern void rtas_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node); 154#else 155static inline void 156rtas_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node) { } 157#endif 158 159#ifdef CONFIG_PPC_POWERNV 160extern void opal_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node); 161#else 162static inline void 163opal_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node) { } 164#endif 165 166#endif /* _ASM_POWERPC_FADUMP_INTERNAL_H */