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 124 125 static inline uint8_t rtas_error_severity(const struct rtas_error_log *elog) 126 { 127 return (elog->byte1 & 0xE0) >> 5; 128 } 129 130 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 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 } 141 142 static inline uint8_t rtas_error_extended(const struct rtas_error_log *elog) 143 { 144 return (elog->byte1 & 0x04) >> 2; 145 } 146 147 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 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 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 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 199 inline uint16_t pseries_errorlog_id(struct pseries_errorlog *sect) 200 { 201 return be16_to_cpu(sect->id); 202 } 203 204 static 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 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 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 */ 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 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 361 static inline int page_is_rtas_user_buf(unsigned long pfn) { return 0;} 362 static inline void pSeries_coalesce_init(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 371 static inline void read_24x7_sys_info(void) { } 372 #endif 373 374 #endif /* __KERNEL__ */ 375 #endif /* _POWERPC_RTAS_H */ 376