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eb39c880 MS |
1 | /* |
2 | * Firmware Assisted dump header file. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | * | |
18 | * Copyright 2011 IBM Corporation | |
19 | * Author: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> | |
20 | */ | |
21 | ||
22 | #ifndef __PPC64_FA_DUMP_H__ | |
23 | #define __PPC64_FA_DUMP_H__ | |
24 | ||
25 | #ifdef CONFIG_FA_DUMP | |
26 | ||
27 | /* | |
28 | * The RMA region will be saved for later dumping when kernel crashes. | |
29 | * RMA is Real Mode Area, the first block of logical memory address owned | |
30 | * by logical partition, containing the storage that may be accessed with | |
31 | * translate off. | |
32 | */ | |
33 | #define RMA_START 0x0 | |
34 | #define RMA_END (ppc64_rma_size) | |
35 | ||
36 | /* | |
37 | * On some Power systems where RMO is 128MB, it still requires minimum of | |
38 | * 256MB for kernel to boot successfully. When kdump infrastructure is | |
39 | * configured to save vmcore over network, we run into OOM issue while | |
40 | * loading modules related to network setup. Hence we need aditional 64M | |
41 | * of memory to avoid OOM issue. | |
42 | */ | |
43 | #define MIN_BOOT_MEM (((RMA_END < (0x1UL << 28)) ? (0x1UL << 28) : RMA_END) \ | |
44 | + (0x1UL << 26)) | |
45 | ||
48a316e3 HB |
46 | /* The upper limit percentage for user specified boot memory size (25%) */ |
47 | #define MAX_BOOT_MEM_RATIO 4 | |
48 | ||
2df173d9 MS |
49 | #define memblock_num_regions(memblock_type) (memblock.memblock_type.cnt) |
50 | ||
eb39c880 MS |
51 | /* Firmware provided dump sections */ |
52 | #define FADUMP_CPU_STATE_DATA 0x0001 | |
53 | #define FADUMP_HPTE_REGION 0x0002 | |
54 | #define FADUMP_REAL_MODE_REGION 0x0011 | |
55 | ||
3ccc00a7 MS |
56 | /* Dump request flag */ |
57 | #define FADUMP_REQUEST_FLAG 0x00000001 | |
58 | ||
59 | /* FAD commands */ | |
60 | #define FADUMP_REGISTER 1 | |
61 | #define FADUMP_UNREGISTER 2 | |
62 | #define FADUMP_INVALIDATE 3 | |
63 | ||
2df173d9 MS |
64 | /* Dump status flag */ |
65 | #define FADUMP_ERROR_FLAG 0x2000 | |
66 | ||
ebaeb5ae MS |
67 | #define FADUMP_CPU_ID_MASK ((1UL << 32) - 1) |
68 | ||
69 | #define CPU_UNKNOWN (~((u32)0)) | |
70 | ||
71 | /* Utility macros */ | |
408cddd9 HB |
72 | #define SKIP_TO_NEXT_CPU(reg_entry) \ |
73 | ({ \ | |
74 | while (be64_to_cpu(reg_entry->reg_id) != REG_ID("CPUEND")) \ | |
75 | reg_entry++; \ | |
76 | reg_entry++; \ | |
ebaeb5ae MS |
77 | }) |
78 | ||
22bd0177 HB |
79 | extern int crashing_cpu; |
80 | ||
3ccc00a7 MS |
81 | /* Kernel Dump section info */ |
82 | struct fadump_section { | |
408cddd9 HB |
83 | __be32 request_flag; |
84 | __be16 source_data_type; | |
85 | __be16 error_flags; | |
86 | __be64 source_address; | |
87 | __be64 source_len; | |
88 | __be64 bytes_dumped; | |
89 | __be64 destination_address; | |
3ccc00a7 MS |
90 | }; |
91 | ||
92 | /* ibm,configure-kernel-dump header. */ | |
93 | struct fadump_section_header { | |
408cddd9 HB |
94 | __be32 dump_format_version; |
95 | __be16 dump_num_sections; | |
96 | __be16 dump_status_flag; | |
97 | __be32 offset_first_dump_section; | |
3ccc00a7 MS |
98 | |
99 | /* Fields for disk dump option. */ | |
408cddd9 HB |
100 | __be32 dd_block_size; |
101 | __be64 dd_block_offset; | |
102 | __be64 dd_num_blocks; | |
103 | __be32 dd_offset_disk_path; | |
3ccc00a7 MS |
104 | |
105 | /* Maximum time allowed to prevent an automatic dump-reboot. */ | |
408cddd9 | 106 | __be32 max_time_auto; |
3ccc00a7 MS |
107 | }; |
108 | ||
109 | /* | |
110 | * Firmware Assisted dump memory structure. This structure is required for | |
111 | * registering future kernel dump with power firmware through rtas call. | |
112 | * | |
113 | * No disk dump option. Hence disk dump path string section is not included. | |
114 | */ | |
115 | struct fadump_mem_struct { | |
116 | struct fadump_section_header header; | |
117 | ||
118 | /* Kernel dump sections */ | |
119 | struct fadump_section cpu_state_data; | |
120 | struct fadump_section hpte_region; | |
121 | struct fadump_section rmr_region; | |
122 | }; | |
123 | ||
124 | /* Firmware-assisted dump configuration details. */ | |
eb39c880 MS |
125 | struct fw_dump { |
126 | unsigned long cpu_state_data_size; | |
127 | unsigned long hpte_region_size; | |
128 | unsigned long boot_memory_size; | |
129 | unsigned long reserve_dump_area_start; | |
130 | unsigned long reserve_dump_area_size; | |
131 | /* cmd line option during boot */ | |
132 | unsigned long reserve_bootvar; | |
133 | ||
2df173d9 | 134 | unsigned long fadumphdr_addr; |
ebaeb5ae MS |
135 | unsigned long cpu_notes_buf; |
136 | unsigned long cpu_notes_buf_size; | |
137 | ||
eb39c880 MS |
138 | int ibm_configure_kernel_dump; |
139 | ||
140 | unsigned long fadump_enabled:1; | |
141 | unsigned long fadump_supported:1; | |
142 | unsigned long dump_active:1; | |
3ccc00a7 | 143 | unsigned long dump_registered:1; |
eb39c880 MS |
144 | }; |
145 | ||
2df173d9 MS |
146 | /* |
147 | * Copy the ascii values for first 8 characters from a string into u64 | |
148 | * variable at their respective indexes. | |
149 | * e.g. | |
150 | * The string "FADMPINF" will be converted into 0x4641444d50494e46 | |
151 | */ | |
152 | static inline u64 str_to_u64(const char *str) | |
153 | { | |
154 | u64 val = 0; | |
155 | int i; | |
156 | ||
157 | for (i = 0; i < sizeof(val); i++) | |
158 | val = (*str) ? (val << 8) | *str++ : val << 8; | |
159 | return val; | |
160 | } | |
161 | #define STR_TO_HEX(x) str_to_u64(x) | |
ebaeb5ae | 162 | #define REG_ID(x) str_to_u64(x) |
2df173d9 MS |
163 | |
164 | #define FADUMP_CRASH_INFO_MAGIC STR_TO_HEX("FADMPINF") | |
ebaeb5ae MS |
165 | #define REGSAVE_AREA_MAGIC STR_TO_HEX("REGSAVE") |
166 | ||
167 | /* The firmware-assisted dump format. | |
168 | * | |
169 | * The register save area is an area in the partition's memory used to preserve | |
170 | * the register contents (CPU state data) for the active CPUs during a firmware | |
171 | * assisted dump. The dump format contains register save area header followed | |
172 | * by register entries. Each list of registers for a CPU starts with | |
173 | * "CPUSTRT" and ends with "CPUEND". | |
174 | */ | |
175 | ||
176 | /* Register save area header. */ | |
177 | struct fadump_reg_save_area_header { | |
408cddd9 HB |
178 | __be64 magic_number; |
179 | __be32 version; | |
180 | __be32 num_cpu_offset; | |
ebaeb5ae MS |
181 | }; |
182 | ||
183 | /* Register entry. */ | |
184 | struct fadump_reg_entry { | |
408cddd9 HB |
185 | __be64 reg_id; |
186 | __be64 reg_value; | |
ebaeb5ae | 187 | }; |
2df173d9 MS |
188 | |
189 | /* fadump crash info structure */ | |
190 | struct fadump_crash_info_header { | |
191 | u64 magic_number; | |
192 | u64 elfcorehdr_addr; | |
ebaeb5ae MS |
193 | u32 crashing_cpu; |
194 | struct pt_regs regs; | |
a0512164 | 195 | struct cpumask online_mask; |
2df173d9 MS |
196 | }; |
197 | ||
2df173d9 MS |
198 | struct fad_crash_memory_ranges { |
199 | unsigned long long base; | |
200 | unsigned long long size; | |
201 | }; | |
202 | ||
eae0dfcc | 203 | extern int is_fadump_boot_memory_area(u64 addr, ulong size); |
eb39c880 MS |
204 | extern int early_init_dt_scan_fw_dump(unsigned long node, |
205 | const char *uname, int depth, void *data); | |
206 | extern int fadump_reserve_mem(void); | |
3ccc00a7 MS |
207 | extern int setup_fadump(void); |
208 | extern int is_fadump_active(void); | |
6fcd6baa | 209 | extern int should_fadump_crash(void); |
ebaeb5ae | 210 | extern void crash_fadump(struct pt_regs *, const char *); |
b500afff MS |
211 | extern void fadump_cleanup(void); |
212 | ||
3ccc00a7 MS |
213 | #else /* CONFIG_FA_DUMP */ |
214 | static inline int is_fadump_active(void) { return 0; } | |
6fcd6baa | 215 | static inline int should_fadump_crash(void) { return 0; } |
ebaeb5ae | 216 | static inline void crash_fadump(struct pt_regs *regs, const char *str) { } |
eb39c880 MS |
217 | #endif |
218 | #endif |