name : fadump-internal.h /* 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 */