1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef _POWERPC_RTAS_H
3 #define _POWERPC_RTAS_H
4 #ifdef __KERNEL__
5
6 #include <linux/spinlock.h>
7 #include <asm/page.h>
8 #include <asm/rtas-types.h>
9 #include <linux/time.h>
10 #include <linux/cpumask.h>
11
12 /*
13 * Definitions for talking to the RTAS on CHRP machines.
14 *
15 * Copyright (C) 2001 Peter Bergner
16 * Copyright (C) 2001 PPC 64 Team, IBM Corp
17 */
18
19 #define RTAS_UNKNOWN_SERVICE (-1)
20 #define RTAS_INSTANTIATE_MAX (1ULL<<30) /* Don't instantiate rtas at/above this value */
21
22 /* Buffer size for ppc_rtas system call. */
23 #define RTAS_RMOBUF_MAX (64 * 1024)
24
25 /* RTAS return status codes */
26 #define RTAS_NOT_SUSPENDABLE -9004
27 #define RTAS_BUSY -2 /* RTAS Busy */
28 #define RTAS_EXTENDED_DELAY_MIN 9900
29 #define RTAS_EXTENDED_DELAY_MAX 9905
30
31 /*
32 * In general to call RTAS use rtas_token("string") to lookup
33 * an RTAS token for the given string (e.g. "event-scan").
34 * To actually perform the call use
35 * ret = rtas_call(token, n_in, n_out, ...)
36 * Where n_in is the number of input parameters and
37 * n_out is the number of output parameters
38 *
39 * If the "string" is invalid on this system, RTAS_UNKNOWN_SERVICE
40 * will be returned as a token. rtas_call() does look for this
41 * token and error out gracefully so rtas_call(rtas_token("str"), ...)
42 * may be safely used for one-shot calls to RTAS.
43 *
44 */
45
46 /* RTAS event classes */
47 #define RTAS_INTERNAL_ERROR 0x80000000 /* set bit 0 */
48 #define RTAS_EPOW_WARNING 0x40000000 /* set bit 1 */
49 #define RTAS_HOTPLUG_EVENTS 0x10000000 /* set bit 3 */
50 #define RTAS_IO_EVENTS 0x08000000 /* set bit 4 */
51 #define RTAS_EVENT_SCAN_ALL_EVENTS 0xffffffff
52
53 /* RTAS event severity */
54 #define RTAS_SEVERITY_FATAL 0x5
55 #define RTAS_SEVERITY_ERROR 0x4
56 #define RTAS_SEVERITY_ERROR_SYNC 0x3
57 #define RTAS_SEVERITY_WARNING 0x2
58 #define RTAS_SEVERITY_EVENT 0x1
59 #define RTAS_SEVERITY_NO_ERROR 0x0
60
61 /* RTAS event disposition */
62 #define RTAS_DISP_FULLY_RECOVERED 0x0
63 #define RTAS_DISP_LIMITED_RECOVERY 0x1
64 #define RTAS_DISP_NOT_RECOVERED 0x2
65
66 /* RTAS event initiator */
67 #define RTAS_INITIATOR_UNKNOWN 0x0
68 #define RTAS_INITIATOR_CPU 0x1
69 #define RTAS_INITIATOR_PCI 0x2
70 #define RTAS_INITIATOR_ISA 0x3
71 #define RTAS_INITIATOR_MEMORY 0x4
72 #define RTAS_INITIATOR_POWERMGM 0x5
73
74 /* RTAS event target */
75 #define RTAS_TARGET_UNKNOWN 0x0
76 #define RTAS_TARGET_CPU 0x1
77 #define RTAS_TARGET_PCI 0x2
78 #define RTAS_TARGET_ISA 0x3
79 #define RTAS_TARGET_MEMORY 0x4
80 #define RTAS_TARGET_POWERMGM 0x5
81
82 /* RTAS event type */
83 #define RTAS_TYPE_RETRY 0x01
84 #define RTAS_TYPE_TCE_ERR 0x02
85 #define RTAS_TYPE_INTERN_DEV_FAIL 0x03
86 #define RTAS_TYPE_TIMEOUT 0x04
87 #define RTAS_TYPE_DATA_PARITY 0x05
88 #define RTAS_TYPE_ADDR_PARITY 0x06
89 #define RTAS_TYPE_CACHE_PARITY 0x07
90 #define RTAS_TYPE_ADDR_INVALID 0x08
91 #define RTAS_TYPE_ECC_UNCORR 0x09
92 #define RTAS_TYPE_ECC_CORR 0x0a
93 #define RTAS_TYPE_EPOW 0x40
94 #define RTAS_TYPE_PLATFORM 0xE0
95 #define RTAS_TYPE_IO 0xE1
96 #define RTAS_TYPE_INFO 0xE2
97 #define RTAS_TYPE_DEALLOC 0xE3
98 #define RTAS_TYPE_DUMP 0xE4
99 #define RTAS_TYPE_HOTPLUG 0xE5
100 /* I don't add PowerMGM events right now, this is a different topic */
101 #define RTAS_TYPE_PMGM_POWER_SW_ON 0x60
102 #define RTAS_TYPE_PMGM_POWER_SW_OFF 0x61
103 #define RTAS_TYPE_PMGM_LID_OPEN 0x62
104 #define RTAS_TYPE_PMGM_LID_CLOSE 0x63
105 #define RTAS_TYPE_PMGM_SLEEP_BTN 0x64
106 #define RTAS_TYPE_PMGM_WAKE_BTN 0x65
107 #define RTAS_TYPE_PMGM_BATTERY_WARN 0x66
108 #define RTAS_TYPE_PMGM_BATTERY_CRIT 0x67
109 #define RTAS_TYPE_PMGM_SWITCH_TO_BAT 0x68
110 #define RTAS_TYPE_PMGM_SWITCH_TO_AC 0x69
111 #define RTAS_TYPE_PMGM_KBD_OR_MOUSE 0x6a
112 #define RTAS_TYPE_PMGM_ENCLOS_OPEN 0x6b
113 #define RTAS_TYPE_PMGM_ENCLOS_CLOSED 0x6c
114 #define RTAS_TYPE_PMGM_RING_INDICATE 0x6d
115 #define RTAS_TYPE_PMGM_LAN_ATTENTION 0x6e
116 #define RTAS_TYPE_PMGM_TIME_ALARM 0x6f
117 #define RTAS_TYPE_PMGM_CONFIG_CHANGE 0x70
118 #define RTAS_TYPE_PMGM_SERVICE_PROC 0x71
119 /* Platform Resource Reassignment Notification */
120 #define RTAS_TYPE_PRRN 0xA0
121
122 /* RTAS check-exception vector offset */
123 #define RTAS_VECTOR_EXTERNAL_INTERRUPT 0x500
124
rtas_error_severity(const struct rtas_error_log * elog)125 static inline uint8_t rtas_error_severity(const struct rtas_error_log *elog)
126 {
127 return (elog->byte1 & 0xE0) >> 5;
128 }
129
rtas_error_disposition(const struct rtas_error_log * elog)130 static inline uint8_t rtas_error_disposition(const struct rtas_error_log *elog)
131 {
132 return (elog->byte1 & 0x18) >> 3;
133 }
134
135 static inline
rtas_set_disposition_recovered(struct rtas_error_log * elog)136 void rtas_set_disposition_recovered(struct rtas_error_log *elog)
137 {
138 elog->byte1 &= ~0x18;
139 elog->byte1 |= (RTAS_DISP_FULLY_RECOVERED << 3);
140 }
141
rtas_error_extended(const struct rtas_error_log * elog)142 static inline uint8_t rtas_error_extended(const struct rtas_error_log *elog)
143 {
144 return (elog->byte1 & 0x04) >> 2;
145 }
146
rtas_error_initiator(const struct rtas_error_log * elog)147 static inline uint8_t rtas_error_initiator(const struct rtas_error_log *elog)
148 {
149 return (elog->byte2 & 0xf0) >> 4;
150 }
151
152 #define rtas_error_type(x) ((x)->byte3)
153
154 static inline
rtas_error_extended_log_length(const struct rtas_error_log * elog)155 uint32_t rtas_error_extended_log_length(const struct rtas_error_log *elog)
156 {
157 return be32_to_cpu(elog->extended_log_length);
158 }
159
160 #define RTAS_V6EXT_LOG_FORMAT_EVENT_LOG 14
161
162 #define RTAS_V6EXT_COMPANY_ID_IBM (('I' << 24) | ('B' << 16) | ('M' << 8))
163
164 static
rtas_ext_event_log_format(struct rtas_ext_event_log_v6 * ext_log)165 inline uint8_t rtas_ext_event_log_format(struct rtas_ext_event_log_v6 *ext_log)
166 {
167 return ext_log->byte2 & 0x0F;
168 }
169
170 static
rtas_ext_event_company_id(struct rtas_ext_event_log_v6 * ext_log)171 inline uint32_t rtas_ext_event_company_id(struct rtas_ext_event_log_v6 *ext_log)
172 {
173 return be32_to_cpu(ext_log->company_id);
174 }
175
176 /* pSeries event log format */
177
178 /* Two bytes ASCII section IDs */
179 #define PSERIES_ELOG_SECT_ID_PRIV_HDR (('P' << 8) | 'H')
180 #define PSERIES_ELOG_SECT_ID_USER_HDR (('U' << 8) | 'H')
181 #define PSERIES_ELOG_SECT_ID_PRIMARY_SRC (('P' << 8) | 'S')
182 #define PSERIES_ELOG_SECT_ID_EXTENDED_UH (('E' << 8) | 'H')
183 #define PSERIES_ELOG_SECT_ID_FAILING_MTMS (('M' << 8) | 'T')
184 #define PSERIES_ELOG_SECT_ID_SECONDARY_SRC (('S' << 8) | 'S')
185 #define PSERIES_ELOG_SECT_ID_DUMP_LOCATOR (('D' << 8) | 'H')
186 #define PSERIES_ELOG_SECT_ID_FW_ERROR (('S' << 8) | 'W')
187 #define PSERIES_ELOG_SECT_ID_IMPACT_PART_ID (('L' << 8) | 'P')
188 #define PSERIES_ELOG_SECT_ID_LOGIC_RESOURCE_ID (('L' << 8) | 'R')
189 #define PSERIES_ELOG_SECT_ID_HMC_ID (('H' << 8) | 'M')
190 #define PSERIES_ELOG_SECT_ID_EPOW (('E' << 8) | 'P')
191 #define PSERIES_ELOG_SECT_ID_IO_EVENT (('I' << 8) | 'E')
192 #define PSERIES_ELOG_SECT_ID_MANUFACT_INFO (('M' << 8) | 'I')
193 #define PSERIES_ELOG_SECT_ID_CALL_HOME (('C' << 8) | 'H')
194 #define PSERIES_ELOG_SECT_ID_USER_DEF (('U' << 8) | 'D')
195 #define PSERIES_ELOG_SECT_ID_HOTPLUG (('H' << 8) | 'P')
196 #define PSERIES_ELOG_SECT_ID_MCE (('M' << 8) | 'C')
197
198 static
pseries_errorlog_id(struct pseries_errorlog * sect)199 inline uint16_t pseries_errorlog_id(struct pseries_errorlog *sect)
200 {
201 return be16_to_cpu(sect->id);
202 }
203
204 static
pseries_errorlog_length(struct pseries_errorlog * sect)205 inline uint16_t pseries_errorlog_length(struct pseries_errorlog *sect)
206 {
207 return be16_to_cpu(sect->length);
208 }
209
210 #define PSERIES_HP_ELOG_RESOURCE_CPU 1
211 #define PSERIES_HP_ELOG_RESOURCE_MEM 2
212 #define PSERIES_HP_ELOG_RESOURCE_SLOT 3
213 #define PSERIES_HP_ELOG_RESOURCE_PHB 4
214 #define PSERIES_HP_ELOG_RESOURCE_PMEM 6
215
216 #define PSERIES_HP_ELOG_ACTION_ADD 1
217 #define PSERIES_HP_ELOG_ACTION_REMOVE 2
218
219 #define PSERIES_HP_ELOG_ID_DRC_NAME 1
220 #define PSERIES_HP_ELOG_ID_DRC_INDEX 2
221 #define PSERIES_HP_ELOG_ID_DRC_COUNT 3
222 #define PSERIES_HP_ELOG_ID_DRC_IC 4
223
224 struct pseries_errorlog *get_pseries_errorlog(struct rtas_error_log *log,
225 uint16_t section_id);
226
227 /*
228 * This can be set by the rtas_flash module so that it can get called
229 * as the absolutely last thing before the kernel terminates.
230 */
231 extern void (*rtas_flash_term_hook)(int);
232
233 extern struct rtas_t rtas;
234
235 extern int rtas_token(const char *service);
236 extern int rtas_service_present(const char *service);
237 extern int rtas_call(int token, int, int, int *, ...);
238 int rtas_call_reentrant(int token, int nargs, int nret, int *outputs, ...);
239 void rtas_call_unlocked(struct rtas_args *args, int token, int nargs,
240 int nret, ...);
241 extern void __noreturn rtas_restart(char *cmd);
242 extern void rtas_power_off(void);
243 extern void __noreturn rtas_halt(void);
244 extern void rtas_os_term(char *str);
245 extern int rtas_get_sensor(int sensor, int index, int *state);
246 extern int rtas_get_sensor_fast(int sensor, int index, int *state);
247 extern int rtas_get_power_level(int powerdomain, int *level);
248 extern int rtas_set_power_level(int powerdomain, int level, int *setlevel);
249 extern bool rtas_indicator_present(int token, int *maxindex);
250 extern int rtas_set_indicator(int indicator, int index, int new_value);
251 extern int rtas_set_indicator_fast(int indicator, int index, int new_value);
252 extern void rtas_progress(char *s, unsigned short hex);
253 extern int rtas_suspend_cpu(struct rtas_suspend_me_data *data);
254 extern int rtas_suspend_last_cpu(struct rtas_suspend_me_data *data);
255 extern int rtas_ibm_suspend_me(u64 handle);
256
257 struct rtc_time;
258 extern time64_t rtas_get_boot_time(void);
259 extern void rtas_get_rtc_time(struct rtc_time *rtc_time);
260 extern int rtas_set_rtc_time(struct rtc_time *rtc_time);
261
262 extern unsigned int rtas_busy_delay_time(int status);
263 extern unsigned int rtas_busy_delay(int status);
264
265 extern int early_init_dt_scan_rtas(unsigned long node,
266 const char *uname, int depth, void *data);
267
268 extern void pSeries_log_error(char *buf, unsigned int err_type, int fatal);
269
270 #ifdef CONFIG_PPC_PSERIES
271 extern time64_t last_rtas_event;
272 extern int clobbering_unread_rtas_event(void);
273 extern int pseries_devicetree_update(s32 scope);
274 extern void post_mobility_fixup(void);
275 #else
clobbering_unread_rtas_event(void)276 static inline int clobbering_unread_rtas_event(void) { return 0; }
277 #endif
278
279 #ifdef CONFIG_PPC_RTAS_DAEMON
280 extern void rtas_cancel_event_scan(void);
281 #else
rtas_cancel_event_scan(void)282 static inline void rtas_cancel_event_scan(void) { }
283 #endif
284
285 /* Error types logged. */
286 #define ERR_FLAG_ALREADY_LOGGED 0x0
287 #define ERR_FLAG_BOOT 0x1 /* log was pulled from NVRAM on boot */
288 #define ERR_TYPE_RTAS_LOG 0x2 /* from rtas event-scan */
289 #define ERR_TYPE_KERNEL_PANIC 0x4 /* from die()/panic() */
290 #define ERR_TYPE_KERNEL_PANIC_GZ 0x8 /* ditto, compressed */
291
292 /* All the types and not flags */
293 #define ERR_TYPE_MASK \
294 (ERR_TYPE_RTAS_LOG | ERR_TYPE_KERNEL_PANIC | ERR_TYPE_KERNEL_PANIC_GZ)
295
296 #define RTAS_DEBUG KERN_DEBUG "RTAS: "
297
298 #define RTAS_ERROR_LOG_MAX 2048
299
300 /*
301 * Return the firmware-specified size of the error log buffer
302 * for all rtas calls that require an error buffer argument.
303 * This includes 'check-exception' and 'rtas-last-error'.
304 */
305 extern int rtas_get_error_log_max(void);
306
307 /* Event Scan Parameters */
308 #define EVENT_SCAN_ALL_EVENTS 0xf0000000
309 #define SURVEILLANCE_TOKEN 9000
310 #define LOG_NUMBER 64 /* must be a power of two */
311 #define LOG_NUMBER_MASK (LOG_NUMBER-1)
312
313 /* Some RTAS ops require a data buffer and that buffer must be < 4G.
314 * Rather than having a memory allocator, just use this buffer
315 * (get the lock first), make the RTAS call. Copy the data instead
316 * of holding the buffer for long.
317 */
318
319 #define RTAS_DATA_BUF_SIZE 4096
320 extern spinlock_t rtas_data_buf_lock;
321 extern char rtas_data_buf[RTAS_DATA_BUF_SIZE];
322
323 /* RMO buffer reserved for user-space RTAS use */
324 extern unsigned long rtas_rmo_buf;
325
326 #define GLOBAL_INTERRUPT_QUEUE 9005
327
328 /**
329 * rtas_config_addr - Format a busno, devfn and reg for RTAS.
330 * @busno: The bus number.
331 * @devfn: The device and function number as encoded by PCI_DEVFN().
332 * @reg: The register number.
333 *
334 * This function encodes the given busno, devfn and register number as
335 * required for RTAS calls that take a "config_addr" parameter.
336 * See PAPR requirement 7.3.4-1 for more info.
337 */
rtas_config_addr(int busno,int devfn,int reg)338 static inline u32 rtas_config_addr(int busno, int devfn, int reg)
339 {
340 return ((reg & 0xf00) << 20) | ((busno & 0xff) << 16) |
341 (devfn << 8) | (reg & 0xff);
342 }
343
344 extern void rtas_give_timebase(void);
345 extern void rtas_take_timebase(void);
346
347 #ifdef CONFIG_PPC_RTAS
page_is_rtas_user_buf(unsigned long pfn)348 static inline int page_is_rtas_user_buf(unsigned long pfn)
349 {
350 unsigned long paddr = (pfn << PAGE_SHIFT);
351 if (paddr >= rtas_rmo_buf && paddr < (rtas_rmo_buf + RTAS_RMOBUF_MAX))
352 return 1;
353 return 0;
354 }
355
356 /* Not the best place to put pSeries_coalesce_init, will be fixed when we
357 * move some of the rtas suspend-me stuff to pseries */
358 extern void pSeries_coalesce_init(void);
359 void rtas_initialize(void);
360 #else
page_is_rtas_user_buf(unsigned long pfn)361 static inline int page_is_rtas_user_buf(unsigned long pfn) { return 0;}
pSeries_coalesce_init(void)362 static inline void pSeries_coalesce_init(void) { }
rtas_initialize(void)363 static inline void rtas_initialize(void) { };
364 #endif
365
366 extern int call_rtas(const char *, int, int, unsigned long *, ...);
367
368 #ifdef CONFIG_HV_PERF_CTRS
369 void read_24x7_sys_info(void);
370 #else
read_24x7_sys_info(void)371 static inline void read_24x7_sys_info(void) { }
372 #endif
373
374 #endif /* __KERNEL__ */
375 #endif /* _POWERPC_RTAS_H */
376