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192.168.1.100 / T108 / e958203796650e3959a43708d67534bf36f4c83b / . / marvell / linux / arch / powerpc / include / asm / fadump-internal.h
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b.liue9582032025-04-17 19:18:16 +0800[diff] [blame^]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/* Alignment per CMA requirement. */
23#define FADUMP_CMA_ALIGNMENT (PAGE_SIZE << \
24 max_t(unsigned long, MAX_ORDER - 1, \
25 pageblock_order))
26
27/* FAD commands */
28#define FADUMP_REGISTER 1
29#define FADUMP_UNREGISTER 2
30#define FADUMP_INVALIDATE 3
31
32/*
33 * Copy the ascii values for first 8 characters from a string into u64
34 * variable at their respective indexes.
35 * e.g.
36 * The string "FADMPINF" will be converted into 0x4641444d50494e46
37 */
38static inline u64 fadump_str_to_u64(const char *str)
39{
40 u64 val = 0;
41 int i;
42
43 for (i = 0; i < sizeof(val); i++)
44 val = (*str) ? (val << 8) | *str++ : val << 8;
45 return val;
46}
47
48#define FADUMP_CPU_UNKNOWN (~((u32)0))
49
50#define FADUMP_CRASH_INFO_MAGIC fadump_str_to_u64("FADMPINF")
51
52/* fadump crash info structure */
53struct fadump_crash_info_header {
54 u64 magic_number;
55 u64 elfcorehdr_addr;
56 u32 crashing_cpu;
57 struct pt_regs regs;
58 struct cpumask online_mask;
59};
60
61struct fadump_memory_range {
62 u64 base;
63 u64 size;
64};
65
66/* fadump memory ranges info */
67#define RNG_NAME_SZ 16
68struct fadump_mrange_info {
69 char name[RNG_NAME_SZ];
70 struct fadump_memory_range *mem_ranges;
71 u32 mem_ranges_sz;
72 u32 mem_range_cnt;
73 u32 max_mem_ranges;
74 bool is_static;
75};
76
77/* Platform specific callback functions */
78struct fadump_ops;
79
80/* Firmware-assisted dump configuration details. */
81struct fw_dump {
82 unsigned long reserve_dump_area_start;
83 unsigned long reserve_dump_area_size;
84 /* cmd line option during boot */
85 unsigned long reserve_bootvar;
86
87 unsigned long cpu_state_data_size;
88 u64 cpu_state_dest_vaddr;
89 u32 cpu_state_data_version;
90 u32 cpu_state_entry_size;
91
92 unsigned long hpte_region_size;
93
94 unsigned long boot_memory_size;
95 u64 boot_mem_dest_addr;
96 u64 boot_mem_addr[FADUMP_MAX_MEM_REGS];
97 u64 boot_mem_sz[FADUMP_MAX_MEM_REGS];
98 u64 boot_mem_top;
99 u64 boot_mem_regs_cnt;
100
101 unsigned long fadumphdr_addr;
102 unsigned long cpu_notes_buf_vaddr;
103 unsigned long cpu_notes_buf_size;
104
105 /*
106 * Maximum size supported by firmware to copy from source to
107 * destination address per entry.
108 */
109 u64 max_copy_size;
110 u64 kernel_metadata;
111
112 int ibm_configure_kernel_dump;
113
114 unsigned long fadump_enabled:1;
115 unsigned long fadump_supported:1;
116 unsigned long dump_active:1;
117 unsigned long dump_registered:1;
118 unsigned long nocma:1;
119
120 struct fadump_ops *ops;
121};
122
123struct fadump_ops {
124 u64 (*fadump_init_mem_struct)(struct fw_dump *fadump_conf);
125 u64 (*fadump_get_metadata_size)(void);
126 int (*fadump_setup_metadata)(struct fw_dump *fadump_conf);
127 u64 (*fadump_get_bootmem_min)(void);
128 int (*fadump_register)(struct fw_dump *fadump_conf);
129 int (*fadump_unregister)(struct fw_dump *fadump_conf);
130 int (*fadump_invalidate)(struct fw_dump *fadump_conf);
131 void (*fadump_cleanup)(struct fw_dump *fadump_conf);
132 int (*fadump_process)(struct fw_dump *fadump_conf);
133 void (*fadump_region_show)(struct fw_dump *fadump_conf,
134 struct seq_file *m);
135 void (*fadump_trigger)(struct fadump_crash_info_header *fdh,
136 const char *msg);
137};
138
139/* Helper functions */
140s32 fadump_setup_cpu_notes_buf(u32 num_cpus);
141void fadump_free_cpu_notes_buf(void);
142u32 *fadump_regs_to_elf_notes(u32 *buf, struct pt_regs *regs);
143void fadump_update_elfcore_header(char *bufp);
144bool is_fadump_boot_mem_contiguous(void);
145bool is_fadump_reserved_mem_contiguous(void);
146
147#else /* !CONFIG_PRESERVE_FA_DUMP */
148
149/* Firmware-assisted dump configuration details. */
150struct fw_dump {
151 u64 boot_mem_top;
152 u64 dump_active;
153};
154
155#endif /* CONFIG_PRESERVE_FA_DUMP */
156
157#ifdef CONFIG_PPC_PSERIES
158extern void rtas_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node);
159#else
160static inline void
161rtas_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node) { }
162#endif
163
164#ifdef CONFIG_PPC_POWERNV
165extern void opal_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node);
166#else
167static inline void
168opal_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node) { }
169#endif
170
171#endif /* _ASM_POWERPC_FADUMP_INTERNAL_H */