summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/include/asm/rtas.h
blob: f0a4db31ecb691841c37843842ad0d76d7deba40 (plain)
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
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
#ifndef _POWERPC_RTAS_H
#define _POWERPC_RTAS_H
#ifdef __KERNEL__

#include <linux/spinlock.h>
#include <asm/page.h>

/*
 * Definitions for talking to the RTAS on CHRP machines.
 *
 * Copyright (C) 2001 Peter Bergner
 * Copyright (C) 2001 PPC 64 Team, IBM Corp
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#define RTAS_UNKNOWN_SERVICE (-1)
#define RTAS_INSTANTIATE_MAX (1ULL<<30) /* Don't instantiate rtas at/above this value */

/* Buffer size for ppc_rtas system call. */
#define RTAS_RMOBUF_MAX (64 * 1024)

/* RTAS return status codes */
#define RTAS_NOT_SUSPENDABLE	-9004
#define RTAS_BUSY		-2    /* RTAS Busy */
#define RTAS_EXTENDED_DELAY_MIN	9900
#define RTAS_EXTENDED_DELAY_MAX	9905

/*
 * In general to call RTAS use rtas_token("string") to lookup
 * an RTAS token for the given string (e.g. "event-scan").
 * To actually perform the call use
 *    ret = rtas_call(token, n_in, n_out, ...)
 * Where n_in is the number of input parameters and
 *       n_out is the number of output parameters
 *
 * If the "string" is invalid on this system, RTAS_UNKNOWN_SERVICE
 * will be returned as a token.  rtas_call() does look for this
 * token and error out gracefully so rtas_call(rtas_token("str"), ...)
 * may be safely used for one-shot calls to RTAS.
 *
 */

typedef u32 rtas_arg_t;

struct rtas_args {
	u32 token;
	u32 nargs;
	u32 nret; 
	rtas_arg_t args[16];
	rtas_arg_t *rets;     /* Pointer to return values in args[]. */
};  

struct rtas_t {
	unsigned long entry;		/* physical address pointer */
	unsigned long base;		/* physical address pointer */
	unsigned long size;
	arch_spinlock_t lock;
	struct rtas_args args;
	struct device_node *dev;	/* virtual address pointer */
};

struct rtas_suspend_me_data {
	atomic_t working; /* number of cpus accessing this struct */
	atomic_t done;
	int token; /* ibm,suspend-me */
	atomic_t error;
	struct completion *complete; /* wait on this until working == 0 */
};

/* RTAS event classes */
#define RTAS_INTERNAL_ERROR		0x80000000 /* set bit 0 */
#define RTAS_EPOW_WARNING		0x40000000 /* set bit 1 */
#define RTAS_HOTPLUG_EVENTS		0x10000000 /* set bit 3 */
#define RTAS_IO_EVENTS			0x08000000 /* set bit 4 */
#define RTAS_EVENT_SCAN_ALL_EVENTS	0xffffffff

/* RTAS event severity */
#define RTAS_SEVERITY_FATAL		0x5
#define RTAS_SEVERITY_ERROR		0x4
#define RTAS_SEVERITY_ERROR_SYNC	0x3
#define RTAS_SEVERITY_WARNING		0x2
#define RTAS_SEVERITY_EVENT		0x1
#define RTAS_SEVERITY_NO_ERROR		0x0

/* RTAS event disposition */
#define RTAS_DISP_FULLY_RECOVERED	0x0
#define RTAS_DISP_LIMITED_RECOVERY	0x1
#define RTAS_DISP_NOT_RECOVERED		0x2

/* RTAS event initiator */
#define RTAS_INITIATOR_UNKNOWN		0x0
#define RTAS_INITIATOR_CPU		0x1
#define RTAS_INITIATOR_PCI		0x2
#define RTAS_INITIATOR_ISA		0x3
#define RTAS_INITIATOR_MEMORY		0x4
#define RTAS_INITIATOR_POWERMGM		0x5

/* RTAS event target */
#define RTAS_TARGET_UNKNOWN		0x0
#define RTAS_TARGET_CPU			0x1
#define RTAS_TARGET_PCI			0x2
#define RTAS_TARGET_ISA			0x3
#define RTAS_TARGET_MEMORY		0x4
#define RTAS_TARGET_POWERMGM		0x5

/* RTAS event type */
#define RTAS_TYPE_RETRY			0x01
#define RTAS_TYPE_TCE_ERR		0x02
#define RTAS_TYPE_INTERN_DEV_FAIL	0x03
#define RTAS_TYPE_TIMEOUT		0x04
#define RTAS_TYPE_DATA_PARITY		0x05
#define RTAS_TYPE_ADDR_PARITY		0x06
#define RTAS_TYPE_CACHE_PARITY		0x07
#define RTAS_TYPE_ADDR_INVALID		0x08
#define RTAS_TYPE_ECC_UNCORR		0x09
#define RTAS_TYPE_ECC_CORR		0x0a
#define RTAS_TYPE_EPOW			0x40
#define RTAS_TYPE_PLATFORM		0xE0
#define RTAS_TYPE_IO			0xE1
#define RTAS_TYPE_INFO			0xE2
#define RTAS_TYPE_DEALLOC		0xE3
#define RTAS_TYPE_DUMP			0xE4
/* I don't add PowerMGM events right now, this is a different topic */ 
#define RTAS_TYPE_PMGM_POWER_SW_ON	0x60
#define RTAS_TYPE_PMGM_POWER_SW_OFF	0x61
#define RTAS_TYPE_PMGM_LID_OPEN		0x62
#define RTAS_TYPE_PMGM_LID_CLOSE	0x63
#define RTAS_TYPE_PMGM_SLEEP_BTN	0x64
#define RTAS_TYPE_PMGM_WAKE_BTN		0x65
#define RTAS_TYPE_PMGM_BATTERY_WARN	0x66
#define RTAS_TYPE_PMGM_BATTERY_CRIT	0x67
#define RTAS_TYPE_PMGM_SWITCH_TO_BAT	0x68
#define RTAS_TYPE_PMGM_SWITCH_TO_AC	0x69
#define RTAS_TYPE_PMGM_KBD_OR_MOUSE	0x6a
#define RTAS_TYPE_PMGM_ENCLOS_OPEN	0x6b
#define RTAS_TYPE_PMGM_ENCLOS_CLOSED	0x6c
#define RTAS_TYPE_PMGM_RING_INDICATE	0x6d
#define RTAS_TYPE_PMGM_LAN_ATTENTION	0x6e
#define RTAS_TYPE_PMGM_TIME_ALARM	0x6f
#define RTAS_TYPE_PMGM_CONFIG_CHANGE	0x70
#define RTAS_TYPE_PMGM_SERVICE_PROC	0x71

/* RTAS check-exception vector offset */
#define RTAS_VECTOR_EXTERNAL_INTERRUPT	0x500

struct rtas_error_log {
	unsigned long version:8;		/* Architectural version */
	unsigned long severity:3;		/* Severity level of error */
	unsigned long disposition:2;		/* Degree of recovery */
	unsigned long extended:1;		/* extended log present? */
	unsigned long /* reserved */ :2;	/* Reserved for future use */
	unsigned long initiator:4;		/* Initiator of event */
	unsigned long target:4;			/* Target of failed operation */
	unsigned long type:8;			/* General event or error*/
	unsigned long extended_log_length:32;	/* length in bytes */
	unsigned char buffer[1];		/* Start of extended log */
						/* Variable length.      */
};

#define RTAS_V6EXT_LOG_FORMAT_EVENT_LOG	14

#define RTAS_V6EXT_COMPANY_ID_IBM	(('I' << 24) | ('B' << 16) | ('M' << 8))

/* RTAS general extended event log, Version 6. The extended log starts
 * from "buffer" field of struct rtas_error_log defined above.
 */
struct rtas_ext_event_log_v6 {
	/* Byte 0 */
	uint32_t log_valid:1;		/* 1:Log valid */
	uint32_t unrecoverable_error:1;	/* 1:Unrecoverable error */
	uint32_t recoverable_error:1;	/* 1:recoverable (correctable	*/
					/*   or successfully retried)	*/
	uint32_t degraded_operation:1;	/* 1:Unrecoverable err, bypassed*/
					/*   - degraded operation (e.g.	*/
					/*   CPU or mem taken off-line)	*/
	uint32_t predictive_error:1;
	uint32_t new_log:1;		/* 1:"New" log (Always 1 for	*/
					/*   data returned from RTAS	*/
	uint32_t big_endian:1;		/* 1: Big endian */
	uint32_t :1;			/* reserved */
	/* Byte 1 */
	uint32_t :8;			/* reserved */
	/* Byte 2 */
	uint32_t powerpc_format:1;	/* Set to 1 (indicating log is	*/
					/* in PowerPC format		*/
	uint32_t :3;			/* reserved */
	uint32_t log_format:4;		/* Log format indicator. Define	*/
					/* format used for byte 12-2047	*/
	/* Byte 3 */
	uint32_t :8;			/* reserved */
	/* Byte 4-11 */
	uint8_t reserved[8];		/* reserved */
	/* Byte 12-15 */
	uint32_t company_id;		/* Company ID of the company	*/
					/* that defines the format for	*/
					/* the vendor specific log type	*/
	/* Byte 16-end of log */
	uint8_t vendor_log[1];		/* Start of vendor specific log	*/
					/* Variable length.		*/
};

/* pSeries event log format */

/* Two bytes ASCII section IDs */
#define PSERIES_ELOG_SECT_ID_PRIV_HDR		(('P' << 8) | 'H')
#define PSERIES_ELOG_SECT_ID_USER_HDR		(('U' << 8) | 'H')
#define PSERIES_ELOG_SECT_ID_PRIMARY_SRC	(('P' << 8) | 'S')
#define PSERIES_ELOG_SECT_ID_EXTENDED_UH	(('E' << 8) | 'H')
#define PSERIES_ELOG_SECT_ID_FAILING_MTMS	(('M' << 8) | 'T')
#define PSERIES_ELOG_SECT_ID_SECONDARY_SRC	(('S' << 8) | 'S')
#define PSERIES_ELOG_SECT_ID_DUMP_LOCATOR	(('D' << 8) | 'H')
#define PSERIES_ELOG_SECT_ID_FW_ERROR		(('S' << 8) | 'W')
#define PSERIES_ELOG_SECT_ID_IMPACT_PART_ID	(('L' << 8) | 'P')
#define PSERIES_ELOG_SECT_ID_LOGIC_RESOURCE_ID	(('L' << 8) | 'R')
#define PSERIES_ELOG_SECT_ID_HMC_ID		(('H' << 8) | 'M')
#define PSERIES_ELOG_SECT_ID_EPOW		(('E' << 8) | 'P')
#define PSERIES_ELOG_SECT_ID_IO_EVENT		(('I' << 8) | 'E')
#define PSERIES_ELOG_SECT_ID_MANUFACT_INFO	(('M' << 8) | 'I')
#define PSERIES_ELOG_SECT_ID_CALL_HOME		(('C' << 8) | 'H')
#define PSERIES_ELOG_SECT_ID_USER_DEF		(('U' << 8) | 'D')

/* Vendor specific Platform Event Log Format, Version 6, section header */
struct pseries_errorlog {
	uint16_t id;			/* 0x00 2-byte ASCII section ID	*/
	uint16_t length;		/* 0x02 Section length in bytes	*/
	uint8_t version;		/* 0x04 Section version		*/
	uint8_t subtype;		/* 0x05 Section subtype		*/
	uint16_t creator_component;	/* 0x06 Creator component ID	*/
	uint8_t data[];			/* 0x08 Start of section data	*/
};

struct pseries_errorlog *get_pseries_errorlog(struct rtas_error_log *log,
					      uint16_t section_id);

/*
 * This can be set by the rtas_flash module so that it can get called
 * as the absolutely last thing before the kernel terminates.
 */
extern void (*rtas_flash_term_hook)(int);

extern struct rtas_t rtas;

extern void enter_rtas(unsigned long);
extern int rtas_token(const char *service);
extern int rtas_service_present(const char *service);
extern int rtas_call(int token, int, int, int *, ...);
extern void rtas_restart(char *cmd);
extern void rtas_power_off(void);
extern void rtas_halt(void);
extern void rtas_os_term(char *str);
extern int rtas_get_sensor(int sensor, int index, int *state);
extern int rtas_get_power_level(int powerdomain, int *level);
extern int rtas_set_power_level(int powerdomain, int level, int *setlevel);
extern bool rtas_indicator_present(int token, int *maxindex);
extern int rtas_set_indicator(int indicator, int index, int new_value);
extern int rtas_set_indicator_fast(int indicator, int index, int new_value);
extern void rtas_progress(char *s, unsigned short hex);
extern void rtas_initialize(void);
extern int rtas_suspend_cpu(struct rtas_suspend_me_data *data);
extern int rtas_suspend_last_cpu(struct rtas_suspend_me_data *data);
extern int rtas_ibm_suspend_me(struct rtas_args *);

struct rtc_time;
extern unsigned long rtas_get_boot_time(void);
extern void rtas_get_rtc_time(struct rtc_time *rtc_time);
extern int rtas_set_rtc_time(struct rtc_time *rtc_time);

extern unsigned int rtas_busy_delay_time(int status);
extern unsigned int rtas_busy_delay(int status);

extern int early_init_dt_scan_rtas(unsigned long node,
		const char *uname, int depth, void *data);

extern void pSeries_log_error(char *buf, unsigned int err_type, int fatal);

#ifdef CONFIG_PPC_RTAS_DAEMON
extern void rtas_cancel_event_scan(void);
#else
static inline void rtas_cancel_event_scan(void) { }
#endif

/* Error types logged.  */
#define ERR_FLAG_ALREADY_LOGGED	0x0
#define ERR_FLAG_BOOT		0x1 	/* log was pulled from NVRAM on boot */
#define ERR_TYPE_RTAS_LOG	0x2	/* from rtas event-scan */
#define ERR_TYPE_KERNEL_PANIC	0x4	/* from die()/panic() */
#define ERR_TYPE_KERNEL_PANIC_GZ 0x8	/* ditto, compressed */

/* All the types and not flags */
#define ERR_TYPE_MASK \
	(ERR_TYPE_RTAS_LOG | ERR_TYPE_KERNEL_PANIC | ERR_TYPE_KERNEL_PANIC_GZ)

#define RTAS_DEBUG KERN_DEBUG "RTAS: "
 
#define RTAS_ERROR_LOG_MAX 2048

/*
 * Return the firmware-specified size of the error log buffer
 *  for all rtas calls that require an error buffer argument.
 *  This includes 'check-exception' and 'rtas-last-error'.
 */
extern int rtas_get_error_log_max(void);

/* Event Scan Parameters */
#define EVENT_SCAN_ALL_EVENTS	0xf0000000
#define SURVEILLANCE_TOKEN	9000
#define LOG_NUMBER		64		/* must be a power of two */
#define LOG_NUMBER_MASK		(LOG_NUMBER-1)

/* Some RTAS ops require a data buffer and that buffer must be < 4G.
 * Rather than having a memory allocator, just use this buffer
 * (get the lock first), make the RTAS call.  Copy the data instead
 * of holding the buffer for long.
 */

#define RTAS_DATA_BUF_SIZE 4096
extern spinlock_t rtas_data_buf_lock;
extern char rtas_data_buf[RTAS_DATA_BUF_SIZE];

/* RMO buffer reserved for user-space RTAS use */
extern unsigned long rtas_rmo_buf;

#define GLOBAL_INTERRUPT_QUEUE 9005

/**
 * rtas_config_addr - Format a busno, devfn and reg for RTAS.
 * @busno: The bus number.
 * @devfn: The device and function number as encoded by PCI_DEVFN().
 * @reg: The register number.
 *
 * This function encodes the given busno, devfn and register number as
 * required for RTAS calls that take a "config_addr" parameter.
 * See PAPR requirement 7.3.4-1 for more info.
 */
static inline u32 rtas_config_addr(int busno, int devfn, int reg)
{
	return ((reg & 0xf00) << 20) | ((busno & 0xff) << 16) |
			(devfn << 8) | (reg & 0xff);
}

extern void __cpuinit rtas_give_timebase(void);
extern void __cpuinit rtas_take_timebase(void);

#ifdef CONFIG_PPC_RTAS
static inline int page_is_rtas_user_buf(unsigned long pfn)
{
	unsigned long paddr = (pfn << PAGE_SHIFT);
	if (paddr >= rtas_rmo_buf && paddr < (rtas_rmo_buf + RTAS_RMOBUF_MAX))
		return 1;
	return 0;
}
#else
static inline int page_is_rtas_user_buf(unsigned long pfn) { return 0;}
#endif

#endif /* __KERNEL__ */
#endif /* _POWERPC_RTAS_H */