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