114a43e69SBenjamin Herrenschmidt /* 214a43e69SBenjamin Herrenschmidt * PowerNV OPAL high level interfaces 314a43e69SBenjamin Herrenschmidt * 414a43e69SBenjamin Herrenschmidt * Copyright 2011 IBM Corp. 514a43e69SBenjamin Herrenschmidt * 614a43e69SBenjamin Herrenschmidt * This program is free software; you can redistribute it and/or 714a43e69SBenjamin Herrenschmidt * modify it under the terms of the GNU General Public License 814a43e69SBenjamin Herrenschmidt * as published by the Free Software Foundation; either version 914a43e69SBenjamin Herrenschmidt * 2 of the License, or (at your option) any later version. 1014a43e69SBenjamin Herrenschmidt */ 1114a43e69SBenjamin Herrenschmidt 1214a43e69SBenjamin Herrenschmidt #undef DEBUG 1314a43e69SBenjamin Herrenschmidt 1414a43e69SBenjamin Herrenschmidt #include <linux/types.h> 1514a43e69SBenjamin Herrenschmidt #include <linux/of.h> 1614a43e69SBenjamin Herrenschmidt #include <linux/of_platform.h> 17a125e092SBenjamin Herrenschmidt #include <linux/interrupt.h> 181bc98de2SGavin Shan #include <linux/notifier.h> 1973ed148aSBenjamin Herrenschmidt #include <linux/slab.h> 2014a43e69SBenjamin Herrenschmidt #include <asm/opal.h> 2114a43e69SBenjamin Herrenschmidt #include <asm/firmware.h> 2214a43e69SBenjamin Herrenschmidt 2314a43e69SBenjamin Herrenschmidt #include "powernv.h" 2414a43e69SBenjamin Herrenschmidt 2514a43e69SBenjamin Herrenschmidt struct opal { 2614a43e69SBenjamin Herrenschmidt u64 base; 2714a43e69SBenjamin Herrenschmidt u64 entry; 2814a43e69SBenjamin Herrenschmidt } opal; 2914a43e69SBenjamin Herrenschmidt 3014a43e69SBenjamin Herrenschmidt static struct device_node *opal_node; 3114a43e69SBenjamin Herrenschmidt static DEFINE_SPINLOCK(opal_write_lock); 32ed79ba9eSBenjamin Herrenschmidt extern u64 opal_mc_secondary_handler[]; 3373ed148aSBenjamin Herrenschmidt static unsigned int *opal_irqs; 3473ed148aSBenjamin Herrenschmidt static unsigned int opal_irq_count; 351bc98de2SGavin Shan static ATOMIC_NOTIFIER_HEAD(opal_notifier_head); 361bc98de2SGavin Shan static DEFINE_SPINLOCK(opal_notifier_lock); 371bc98de2SGavin Shan static uint64_t last_notified_mask = 0x0ul; 381bc98de2SGavin Shan static atomic_t opal_notifier_hold = ATOMIC_INIT(0); 3914a43e69SBenjamin Herrenschmidt 4014a43e69SBenjamin Herrenschmidt int __init early_init_dt_scan_opal(unsigned long node, 4114a43e69SBenjamin Herrenschmidt const char *uname, int depth, void *data) 4214a43e69SBenjamin Herrenschmidt { 4314a43e69SBenjamin Herrenschmidt const void *basep, *entryp; 4414a43e69SBenjamin Herrenschmidt unsigned long basesz, entrysz; 4514a43e69SBenjamin Herrenschmidt 4614a43e69SBenjamin Herrenschmidt if (depth != 1 || strcmp(uname, "ibm,opal") != 0) 4714a43e69SBenjamin Herrenschmidt return 0; 4814a43e69SBenjamin Herrenschmidt 4914a43e69SBenjamin Herrenschmidt basep = of_get_flat_dt_prop(node, "opal-base-address", &basesz); 5014a43e69SBenjamin Herrenschmidt entryp = of_get_flat_dt_prop(node, "opal-entry-address", &entrysz); 5114a43e69SBenjamin Herrenschmidt 5214a43e69SBenjamin Herrenschmidt if (!basep || !entryp) 5314a43e69SBenjamin Herrenschmidt return 1; 5414a43e69SBenjamin Herrenschmidt 5514a43e69SBenjamin Herrenschmidt opal.base = of_read_number(basep, basesz/4); 5614a43e69SBenjamin Herrenschmidt opal.entry = of_read_number(entryp, entrysz/4); 5714a43e69SBenjamin Herrenschmidt 5814a43e69SBenjamin Herrenschmidt pr_debug("OPAL Base = 0x%llx (basep=%p basesz=%ld)\n", 5914a43e69SBenjamin Herrenschmidt opal.base, basep, basesz); 6014a43e69SBenjamin Herrenschmidt pr_debug("OPAL Entry = 0x%llx (entryp=%p basesz=%ld)\n", 6114a43e69SBenjamin Herrenschmidt opal.entry, entryp, entrysz); 6214a43e69SBenjamin Herrenschmidt 6314a43e69SBenjamin Herrenschmidt powerpc_firmware_features |= FW_FEATURE_OPAL; 6475b93da4SBenjamin Herrenschmidt if (of_flat_dt_is_compatible(node, "ibm,opal-v3")) { 6575b93da4SBenjamin Herrenschmidt powerpc_firmware_features |= FW_FEATURE_OPALv2; 6675b93da4SBenjamin Herrenschmidt powerpc_firmware_features |= FW_FEATURE_OPALv3; 6775b93da4SBenjamin Herrenschmidt printk("OPAL V3 detected !\n"); 6875b93da4SBenjamin Herrenschmidt } else if (of_flat_dt_is_compatible(node, "ibm,opal-v2")) { 6914a43e69SBenjamin Herrenschmidt powerpc_firmware_features |= FW_FEATURE_OPALv2; 7014a43e69SBenjamin Herrenschmidt printk("OPAL V2 detected !\n"); 7114a43e69SBenjamin Herrenschmidt } else { 7214a43e69SBenjamin Herrenschmidt printk("OPAL V1 detected !\n"); 7314a43e69SBenjamin Herrenschmidt } 7414a43e69SBenjamin Herrenschmidt 75c4463b37SJeremy Kerr return 1; 76c4463b37SJeremy Kerr } 77c4463b37SJeremy Kerr 78c4463b37SJeremy Kerr static int __init opal_register_exception_handlers(void) 79c4463b37SJeremy Kerr { 80c4463b37SJeremy Kerr u64 glue; 81c4463b37SJeremy Kerr 82c4463b37SJeremy Kerr if (!(powerpc_firmware_features & FW_FEATURE_OPAL)) 83c4463b37SJeremy Kerr return -ENODEV; 84c4463b37SJeremy Kerr 85ed79ba9eSBenjamin Herrenschmidt /* Hookup some exception handlers. We use the fwnmi area at 0x7000 86ed79ba9eSBenjamin Herrenschmidt * to provide the glue space to OPAL 87ed79ba9eSBenjamin Herrenschmidt */ 88ed79ba9eSBenjamin Herrenschmidt glue = 0x7000; 89ed79ba9eSBenjamin Herrenschmidt opal_register_exception_handler(OPAL_MACHINE_CHECK_HANDLER, 90ed79ba9eSBenjamin Herrenschmidt __pa(opal_mc_secondary_handler[0]), 91ed79ba9eSBenjamin Herrenschmidt glue); 92ed79ba9eSBenjamin Herrenschmidt glue += 128; 93ed79ba9eSBenjamin Herrenschmidt opal_register_exception_handler(OPAL_HYPERVISOR_MAINTENANCE_HANDLER, 94ed79ba9eSBenjamin Herrenschmidt 0, glue); 95ed79ba9eSBenjamin Herrenschmidt glue += 128; 96ed79ba9eSBenjamin Herrenschmidt opal_register_exception_handler(OPAL_SOFTPATCH_HANDLER, 0, glue); 97ed79ba9eSBenjamin Herrenschmidt 98c4463b37SJeremy Kerr return 0; 9914a43e69SBenjamin Herrenschmidt } 10014a43e69SBenjamin Herrenschmidt 101c4463b37SJeremy Kerr early_initcall(opal_register_exception_handlers); 102c4463b37SJeremy Kerr 1031bc98de2SGavin Shan int opal_notifier_register(struct notifier_block *nb) 1041bc98de2SGavin Shan { 1051bc98de2SGavin Shan if (!nb) { 1061bc98de2SGavin Shan pr_warning("%s: Invalid argument (%p)\n", 1071bc98de2SGavin Shan __func__, nb); 1081bc98de2SGavin Shan return -EINVAL; 1091bc98de2SGavin Shan } 1101bc98de2SGavin Shan 1111bc98de2SGavin Shan atomic_notifier_chain_register(&opal_notifier_head, nb); 1121bc98de2SGavin Shan return 0; 1131bc98de2SGavin Shan } 1141bc98de2SGavin Shan 1151bc98de2SGavin Shan static void opal_do_notifier(uint64_t events) 1161bc98de2SGavin Shan { 1171bc98de2SGavin Shan unsigned long flags; 1181bc98de2SGavin Shan uint64_t changed_mask; 1191bc98de2SGavin Shan 1201bc98de2SGavin Shan if (atomic_read(&opal_notifier_hold)) 1211bc98de2SGavin Shan return; 1221bc98de2SGavin Shan 1231bc98de2SGavin Shan spin_lock_irqsave(&opal_notifier_lock, flags); 1241bc98de2SGavin Shan changed_mask = last_notified_mask ^ events; 1251bc98de2SGavin Shan last_notified_mask = events; 1261bc98de2SGavin Shan spin_unlock_irqrestore(&opal_notifier_lock, flags); 1271bc98de2SGavin Shan 1281bc98de2SGavin Shan /* 1291bc98de2SGavin Shan * We feed with the event bits and changed bits for 1301bc98de2SGavin Shan * enough information to the callback. 1311bc98de2SGavin Shan */ 1321bc98de2SGavin Shan atomic_notifier_call_chain(&opal_notifier_head, 1331bc98de2SGavin Shan events, (void *)changed_mask); 1341bc98de2SGavin Shan } 1351bc98de2SGavin Shan 1361bc98de2SGavin Shan void opal_notifier_update_evt(uint64_t evt_mask, 1371bc98de2SGavin Shan uint64_t evt_val) 1381bc98de2SGavin Shan { 1391bc98de2SGavin Shan unsigned long flags; 1401bc98de2SGavin Shan 1411bc98de2SGavin Shan spin_lock_irqsave(&opal_notifier_lock, flags); 1421bc98de2SGavin Shan last_notified_mask &= ~evt_mask; 1431bc98de2SGavin Shan last_notified_mask |= evt_val; 1441bc98de2SGavin Shan spin_unlock_irqrestore(&opal_notifier_lock, flags); 1451bc98de2SGavin Shan } 1461bc98de2SGavin Shan 1471bc98de2SGavin Shan void opal_notifier_enable(void) 1481bc98de2SGavin Shan { 1491bc98de2SGavin Shan int64_t rc; 1501bc98de2SGavin Shan uint64_t evt = 0; 1511bc98de2SGavin Shan 1521bc98de2SGavin Shan atomic_set(&opal_notifier_hold, 0); 1531bc98de2SGavin Shan 1541bc98de2SGavin Shan /* Process pending events */ 1551bc98de2SGavin Shan rc = opal_poll_events(&evt); 1561bc98de2SGavin Shan if (rc == OPAL_SUCCESS && evt) 1571bc98de2SGavin Shan opal_do_notifier(evt); 1581bc98de2SGavin Shan } 1591bc98de2SGavin Shan 1601bc98de2SGavin Shan void opal_notifier_disable(void) 1611bc98de2SGavin Shan { 1621bc98de2SGavin Shan atomic_set(&opal_notifier_hold, 1); 1631bc98de2SGavin Shan } 1641bc98de2SGavin Shan 16514a43e69SBenjamin Herrenschmidt int opal_get_chars(uint32_t vtermno, char *buf, int count) 16614a43e69SBenjamin Herrenschmidt { 16714a43e69SBenjamin Herrenschmidt s64 len, rc; 16814a43e69SBenjamin Herrenschmidt u64 evt; 16914a43e69SBenjamin Herrenschmidt 17014a43e69SBenjamin Herrenschmidt if (!opal.entry) 171daea1175SBenjamin Herrenschmidt return -ENODEV; 17214a43e69SBenjamin Herrenschmidt opal_poll_events(&evt); 17314a43e69SBenjamin Herrenschmidt if ((evt & OPAL_EVENT_CONSOLE_INPUT) == 0) 17414a43e69SBenjamin Herrenschmidt return 0; 17514a43e69SBenjamin Herrenschmidt len = count; 17614a43e69SBenjamin Herrenschmidt rc = opal_console_read(vtermno, &len, buf); 17714a43e69SBenjamin Herrenschmidt if (rc == OPAL_SUCCESS) 17814a43e69SBenjamin Herrenschmidt return len; 17914a43e69SBenjamin Herrenschmidt return 0; 18014a43e69SBenjamin Herrenschmidt } 18114a43e69SBenjamin Herrenschmidt 18214a43e69SBenjamin Herrenschmidt int opal_put_chars(uint32_t vtermno, const char *data, int total_len) 18314a43e69SBenjamin Herrenschmidt { 18414a43e69SBenjamin Herrenschmidt int written = 0; 185daea1175SBenjamin Herrenschmidt s64 len, rc; 18614a43e69SBenjamin Herrenschmidt unsigned long flags; 18714a43e69SBenjamin Herrenschmidt u64 evt; 18814a43e69SBenjamin Herrenschmidt 18914a43e69SBenjamin Herrenschmidt if (!opal.entry) 190daea1175SBenjamin Herrenschmidt return -ENODEV; 19114a43e69SBenjamin Herrenschmidt 19214a43e69SBenjamin Herrenschmidt /* We want put_chars to be atomic to avoid mangling of hvsi 19314a43e69SBenjamin Herrenschmidt * packets. To do that, we first test for room and return 194daea1175SBenjamin Herrenschmidt * -EAGAIN if there isn't enough. 195daea1175SBenjamin Herrenschmidt * 196daea1175SBenjamin Herrenschmidt * Unfortunately, opal_console_write_buffer_space() doesn't 197daea1175SBenjamin Herrenschmidt * appear to work on opal v1, so we just assume there is 198daea1175SBenjamin Herrenschmidt * enough room and be done with it 19914a43e69SBenjamin Herrenschmidt */ 20014a43e69SBenjamin Herrenschmidt spin_lock_irqsave(&opal_write_lock, flags); 201daea1175SBenjamin Herrenschmidt if (firmware_has_feature(FW_FEATURE_OPALv2)) { 20214a43e69SBenjamin Herrenschmidt rc = opal_console_write_buffer_space(vtermno, &len); 20314a43e69SBenjamin Herrenschmidt if (rc || len < total_len) { 20414a43e69SBenjamin Herrenschmidt spin_unlock_irqrestore(&opal_write_lock, flags); 20514a43e69SBenjamin Herrenschmidt /* Closed -> drop characters */ 20614a43e69SBenjamin Herrenschmidt if (rc) 20714a43e69SBenjamin Herrenschmidt return total_len; 20814a43e69SBenjamin Herrenschmidt opal_poll_events(&evt); 20914a43e69SBenjamin Herrenschmidt return -EAGAIN; 21014a43e69SBenjamin Herrenschmidt } 211daea1175SBenjamin Herrenschmidt } 21214a43e69SBenjamin Herrenschmidt 21314a43e69SBenjamin Herrenschmidt /* We still try to handle partial completions, though they 21414a43e69SBenjamin Herrenschmidt * should no longer happen. 21514a43e69SBenjamin Herrenschmidt */ 216daea1175SBenjamin Herrenschmidt rc = OPAL_BUSY; 21714a43e69SBenjamin Herrenschmidt while(total_len > 0 && (rc == OPAL_BUSY || 21814a43e69SBenjamin Herrenschmidt rc == OPAL_BUSY_EVENT || rc == OPAL_SUCCESS)) { 21914a43e69SBenjamin Herrenschmidt len = total_len; 22014a43e69SBenjamin Herrenschmidt rc = opal_console_write(vtermno, &len, data); 2211de1455fSBenjamin Herrenschmidt 2221de1455fSBenjamin Herrenschmidt /* Closed or other error drop */ 2231de1455fSBenjamin Herrenschmidt if (rc != OPAL_SUCCESS && rc != OPAL_BUSY && 2241de1455fSBenjamin Herrenschmidt rc != OPAL_BUSY_EVENT) { 2251de1455fSBenjamin Herrenschmidt written = total_len; 2261de1455fSBenjamin Herrenschmidt break; 2271de1455fSBenjamin Herrenschmidt } 22814a43e69SBenjamin Herrenschmidt if (rc == OPAL_SUCCESS) { 22914a43e69SBenjamin Herrenschmidt total_len -= len; 23014a43e69SBenjamin Herrenschmidt data += len; 23114a43e69SBenjamin Herrenschmidt written += len; 23214a43e69SBenjamin Herrenschmidt } 23314a43e69SBenjamin Herrenschmidt /* This is a bit nasty but we need that for the console to 23414a43e69SBenjamin Herrenschmidt * flush when there aren't any interrupts. We will clean 23514a43e69SBenjamin Herrenschmidt * things a bit later to limit that to synchronous path 23614a43e69SBenjamin Herrenschmidt * such as the kernel console and xmon/udbg 23714a43e69SBenjamin Herrenschmidt */ 23814a43e69SBenjamin Herrenschmidt do 23914a43e69SBenjamin Herrenschmidt opal_poll_events(&evt); 24014a43e69SBenjamin Herrenschmidt while(rc == OPAL_SUCCESS && (evt & OPAL_EVENT_CONSOLE_OUTPUT)); 24114a43e69SBenjamin Herrenschmidt } 24214a43e69SBenjamin Herrenschmidt spin_unlock_irqrestore(&opal_write_lock, flags); 24314a43e69SBenjamin Herrenschmidt return written; 24414a43e69SBenjamin Herrenschmidt } 24514a43e69SBenjamin Herrenschmidt 246ed79ba9eSBenjamin Herrenschmidt int opal_machine_check(struct pt_regs *regs) 247ed79ba9eSBenjamin Herrenschmidt { 248ed79ba9eSBenjamin Herrenschmidt struct opal_machine_check_event *opal_evt = get_paca()->opal_mc_evt; 249ed79ba9eSBenjamin Herrenschmidt struct opal_machine_check_event evt; 250ed79ba9eSBenjamin Herrenschmidt const char *level, *sevstr, *subtype; 251ed79ba9eSBenjamin Herrenschmidt static const char *opal_mc_ue_types[] = { 252ed79ba9eSBenjamin Herrenschmidt "Indeterminate", 253ed79ba9eSBenjamin Herrenschmidt "Instruction fetch", 254ed79ba9eSBenjamin Herrenschmidt "Page table walk ifetch", 255ed79ba9eSBenjamin Herrenschmidt "Load/Store", 256ed79ba9eSBenjamin Herrenschmidt "Page table walk Load/Store", 257ed79ba9eSBenjamin Herrenschmidt }; 258ed79ba9eSBenjamin Herrenschmidt static const char *opal_mc_slb_types[] = { 259ed79ba9eSBenjamin Herrenschmidt "Indeterminate", 260ed79ba9eSBenjamin Herrenschmidt "Parity", 261ed79ba9eSBenjamin Herrenschmidt "Multihit", 262ed79ba9eSBenjamin Herrenschmidt }; 263ed79ba9eSBenjamin Herrenschmidt static const char *opal_mc_erat_types[] = { 264ed79ba9eSBenjamin Herrenschmidt "Indeterminate", 265ed79ba9eSBenjamin Herrenschmidt "Parity", 266ed79ba9eSBenjamin Herrenschmidt "Multihit", 267ed79ba9eSBenjamin Herrenschmidt }; 268ed79ba9eSBenjamin Herrenschmidt static const char *opal_mc_tlb_types[] = { 269ed79ba9eSBenjamin Herrenschmidt "Indeterminate", 270ed79ba9eSBenjamin Herrenschmidt "Parity", 271ed79ba9eSBenjamin Herrenschmidt "Multihit", 272ed79ba9eSBenjamin Herrenschmidt }; 273ed79ba9eSBenjamin Herrenschmidt 274ed79ba9eSBenjamin Herrenschmidt /* Copy the event structure and release the original */ 275ed79ba9eSBenjamin Herrenschmidt evt = *opal_evt; 276ed79ba9eSBenjamin Herrenschmidt opal_evt->in_use = 0; 277ed79ba9eSBenjamin Herrenschmidt 278ed79ba9eSBenjamin Herrenschmidt /* Print things out */ 279ed79ba9eSBenjamin Herrenschmidt if (evt.version != OpalMCE_V1) { 280ed79ba9eSBenjamin Herrenschmidt pr_err("Machine Check Exception, Unknown event version %d !\n", 281ed79ba9eSBenjamin Herrenschmidt evt.version); 282ed79ba9eSBenjamin Herrenschmidt return 0; 283ed79ba9eSBenjamin Herrenschmidt } 284ed79ba9eSBenjamin Herrenschmidt switch(evt.severity) { 285ed79ba9eSBenjamin Herrenschmidt case OpalMCE_SEV_NO_ERROR: 286ed79ba9eSBenjamin Herrenschmidt level = KERN_INFO; 287ed79ba9eSBenjamin Herrenschmidt sevstr = "Harmless"; 288ed79ba9eSBenjamin Herrenschmidt break; 289ed79ba9eSBenjamin Herrenschmidt case OpalMCE_SEV_WARNING: 290ed79ba9eSBenjamin Herrenschmidt level = KERN_WARNING; 291ed79ba9eSBenjamin Herrenschmidt sevstr = ""; 292ed79ba9eSBenjamin Herrenschmidt break; 293ed79ba9eSBenjamin Herrenschmidt case OpalMCE_SEV_ERROR_SYNC: 294ed79ba9eSBenjamin Herrenschmidt level = KERN_ERR; 295ed79ba9eSBenjamin Herrenschmidt sevstr = "Severe"; 296ed79ba9eSBenjamin Herrenschmidt break; 297ed79ba9eSBenjamin Herrenschmidt case OpalMCE_SEV_FATAL: 298ed79ba9eSBenjamin Herrenschmidt default: 299ed79ba9eSBenjamin Herrenschmidt level = KERN_ERR; 300ed79ba9eSBenjamin Herrenschmidt sevstr = "Fatal"; 301ed79ba9eSBenjamin Herrenschmidt break; 302ed79ba9eSBenjamin Herrenschmidt } 303ed79ba9eSBenjamin Herrenschmidt 304ed79ba9eSBenjamin Herrenschmidt printk("%s%s Machine check interrupt [%s]\n", level, sevstr, 305ed79ba9eSBenjamin Herrenschmidt evt.disposition == OpalMCE_DISPOSITION_RECOVERED ? 306ed79ba9eSBenjamin Herrenschmidt "Recovered" : "[Not recovered"); 307ed79ba9eSBenjamin Herrenschmidt printk("%s Initiator: %s\n", level, 308ed79ba9eSBenjamin Herrenschmidt evt.initiator == OpalMCE_INITIATOR_CPU ? "CPU" : "Unknown"); 309ed79ba9eSBenjamin Herrenschmidt switch(evt.error_type) { 310ed79ba9eSBenjamin Herrenschmidt case OpalMCE_ERROR_TYPE_UE: 311ed79ba9eSBenjamin Herrenschmidt subtype = evt.u.ue_error.ue_error_type < 312ed79ba9eSBenjamin Herrenschmidt ARRAY_SIZE(opal_mc_ue_types) ? 313ed79ba9eSBenjamin Herrenschmidt opal_mc_ue_types[evt.u.ue_error.ue_error_type] 314ed79ba9eSBenjamin Herrenschmidt : "Unknown"; 315ed79ba9eSBenjamin Herrenschmidt printk("%s Error type: UE [%s]\n", level, subtype); 316ed79ba9eSBenjamin Herrenschmidt if (evt.u.ue_error.effective_address_provided) 317ed79ba9eSBenjamin Herrenschmidt printk("%s Effective address: %016llx\n", 318ed79ba9eSBenjamin Herrenschmidt level, evt.u.ue_error.effective_address); 319ed79ba9eSBenjamin Herrenschmidt if (evt.u.ue_error.physical_address_provided) 320ed79ba9eSBenjamin Herrenschmidt printk("%s Physial address: %016llx\n", 321ed79ba9eSBenjamin Herrenschmidt level, evt.u.ue_error.physical_address); 322ed79ba9eSBenjamin Herrenschmidt break; 323ed79ba9eSBenjamin Herrenschmidt case OpalMCE_ERROR_TYPE_SLB: 324ed79ba9eSBenjamin Herrenschmidt subtype = evt.u.slb_error.slb_error_type < 325ed79ba9eSBenjamin Herrenschmidt ARRAY_SIZE(opal_mc_slb_types) ? 326ed79ba9eSBenjamin Herrenschmidt opal_mc_slb_types[evt.u.slb_error.slb_error_type] 327ed79ba9eSBenjamin Herrenschmidt : "Unknown"; 328ed79ba9eSBenjamin Herrenschmidt printk("%s Error type: SLB [%s]\n", level, subtype); 329ed79ba9eSBenjamin Herrenschmidt if (evt.u.slb_error.effective_address_provided) 330ed79ba9eSBenjamin Herrenschmidt printk("%s Effective address: %016llx\n", 331ed79ba9eSBenjamin Herrenschmidt level, evt.u.slb_error.effective_address); 332ed79ba9eSBenjamin Herrenschmidt break; 333ed79ba9eSBenjamin Herrenschmidt case OpalMCE_ERROR_TYPE_ERAT: 334ed79ba9eSBenjamin Herrenschmidt subtype = evt.u.erat_error.erat_error_type < 335ed79ba9eSBenjamin Herrenschmidt ARRAY_SIZE(opal_mc_erat_types) ? 336ed79ba9eSBenjamin Herrenschmidt opal_mc_erat_types[evt.u.erat_error.erat_error_type] 337ed79ba9eSBenjamin Herrenschmidt : "Unknown"; 338ed79ba9eSBenjamin Herrenschmidt printk("%s Error type: ERAT [%s]\n", level, subtype); 339ed79ba9eSBenjamin Herrenschmidt if (evt.u.erat_error.effective_address_provided) 340ed79ba9eSBenjamin Herrenschmidt printk("%s Effective address: %016llx\n", 341ed79ba9eSBenjamin Herrenschmidt level, evt.u.erat_error.effective_address); 342ed79ba9eSBenjamin Herrenschmidt break; 343ed79ba9eSBenjamin Herrenschmidt case OpalMCE_ERROR_TYPE_TLB: 344ed79ba9eSBenjamin Herrenschmidt subtype = evt.u.tlb_error.tlb_error_type < 345ed79ba9eSBenjamin Herrenschmidt ARRAY_SIZE(opal_mc_tlb_types) ? 346ed79ba9eSBenjamin Herrenschmidt opal_mc_tlb_types[evt.u.tlb_error.tlb_error_type] 347ed79ba9eSBenjamin Herrenschmidt : "Unknown"; 348ed79ba9eSBenjamin Herrenschmidt printk("%s Error type: TLB [%s]\n", level, subtype); 349ed79ba9eSBenjamin Herrenschmidt if (evt.u.tlb_error.effective_address_provided) 350ed79ba9eSBenjamin Herrenschmidt printk("%s Effective address: %016llx\n", 351ed79ba9eSBenjamin Herrenschmidt level, evt.u.tlb_error.effective_address); 352ed79ba9eSBenjamin Herrenschmidt break; 353ed79ba9eSBenjamin Herrenschmidt default: 354ed79ba9eSBenjamin Herrenschmidt case OpalMCE_ERROR_TYPE_UNKNOWN: 355ed79ba9eSBenjamin Herrenschmidt printk("%s Error type: Unknown\n", level); 356ed79ba9eSBenjamin Herrenschmidt break; 357ed79ba9eSBenjamin Herrenschmidt } 358ed79ba9eSBenjamin Herrenschmidt return evt.severity == OpalMCE_SEV_FATAL ? 0 : 1; 359ed79ba9eSBenjamin Herrenschmidt } 360ed79ba9eSBenjamin Herrenschmidt 361a125e092SBenjamin Herrenschmidt static irqreturn_t opal_interrupt(int irq, void *data) 362a125e092SBenjamin Herrenschmidt { 363a125e092SBenjamin Herrenschmidt uint64_t events; 364a125e092SBenjamin Herrenschmidt 365a125e092SBenjamin Herrenschmidt opal_handle_interrupt(virq_to_hw(irq), &events); 366a125e092SBenjamin Herrenschmidt 3671bc98de2SGavin Shan opal_do_notifier(events); 368a125e092SBenjamin Herrenschmidt 369a125e092SBenjamin Herrenschmidt return IRQ_HANDLED; 370a125e092SBenjamin Herrenschmidt } 371a125e092SBenjamin Herrenschmidt 37214a43e69SBenjamin Herrenschmidt static int __init opal_init(void) 37314a43e69SBenjamin Herrenschmidt { 37414a43e69SBenjamin Herrenschmidt struct device_node *np, *consoles; 375a125e092SBenjamin Herrenschmidt const u32 *irqs; 376a125e092SBenjamin Herrenschmidt int rc, i, irqlen; 37714a43e69SBenjamin Herrenschmidt 37814a43e69SBenjamin Herrenschmidt opal_node = of_find_node_by_path("/ibm,opal"); 37914a43e69SBenjamin Herrenschmidt if (!opal_node) { 38014a43e69SBenjamin Herrenschmidt pr_warn("opal: Node not found\n"); 38114a43e69SBenjamin Herrenschmidt return -ENODEV; 38214a43e69SBenjamin Herrenschmidt } 3832db29d28SBenjamin Herrenschmidt 3842db29d28SBenjamin Herrenschmidt /* Register OPAL consoles if any ports */ 38514a43e69SBenjamin Herrenschmidt if (firmware_has_feature(FW_FEATURE_OPALv2)) 38614a43e69SBenjamin Herrenschmidt consoles = of_find_node_by_path("/ibm,opal/consoles"); 38714a43e69SBenjamin Herrenschmidt else 38814a43e69SBenjamin Herrenschmidt consoles = of_node_get(opal_node); 3892db29d28SBenjamin Herrenschmidt if (consoles) { 39014a43e69SBenjamin Herrenschmidt for_each_child_of_node(consoles, np) { 39114a43e69SBenjamin Herrenschmidt if (strcmp(np->name, "serial")) 39214a43e69SBenjamin Herrenschmidt continue; 39314a43e69SBenjamin Herrenschmidt of_platform_device_create(np, NULL, NULL); 39414a43e69SBenjamin Herrenschmidt } 39514a43e69SBenjamin Herrenschmidt of_node_put(consoles); 3962db29d28SBenjamin Herrenschmidt } 397a125e092SBenjamin Herrenschmidt 398a125e092SBenjamin Herrenschmidt /* Find all OPAL interrupts and request them */ 399a125e092SBenjamin Herrenschmidt irqs = of_get_property(opal_node, "opal-interrupts", &irqlen); 400a125e092SBenjamin Herrenschmidt pr_debug("opal: Found %d interrupts reserved for OPAL\n", 401a125e092SBenjamin Herrenschmidt irqs ? (irqlen / 4) : 0); 40273ed148aSBenjamin Herrenschmidt opal_irq_count = irqlen / 4; 40373ed148aSBenjamin Herrenschmidt opal_irqs = kzalloc(opal_irq_count * sizeof(unsigned int), GFP_KERNEL); 404a125e092SBenjamin Herrenschmidt for (i = 0; irqs && i < (irqlen / 4); i++, irqs++) { 405a125e092SBenjamin Herrenschmidt unsigned int hwirq = be32_to_cpup(irqs); 406a125e092SBenjamin Herrenschmidt unsigned int irq = irq_create_mapping(NULL, hwirq); 407a125e092SBenjamin Herrenschmidt if (irq == NO_IRQ) { 408a125e092SBenjamin Herrenschmidt pr_warning("opal: Failed to map irq 0x%x\n", hwirq); 409a125e092SBenjamin Herrenschmidt continue; 410a125e092SBenjamin Herrenschmidt } 411a125e092SBenjamin Herrenschmidt rc = request_irq(irq, opal_interrupt, 0, "opal", NULL); 412a125e092SBenjamin Herrenschmidt if (rc) 413a125e092SBenjamin Herrenschmidt pr_warning("opal: Error %d requesting irq %d" 414a125e092SBenjamin Herrenschmidt " (0x%x)\n", rc, irq, hwirq); 41573ed148aSBenjamin Herrenschmidt opal_irqs[i] = irq; 416a125e092SBenjamin Herrenschmidt } 41714a43e69SBenjamin Herrenschmidt return 0; 41814a43e69SBenjamin Herrenschmidt } 41914a43e69SBenjamin Herrenschmidt subsys_initcall(opal_init); 42073ed148aSBenjamin Herrenschmidt 42173ed148aSBenjamin Herrenschmidt void opal_shutdown(void) 42273ed148aSBenjamin Herrenschmidt { 42373ed148aSBenjamin Herrenschmidt unsigned int i; 42473ed148aSBenjamin Herrenschmidt 42573ed148aSBenjamin Herrenschmidt for (i = 0; i < opal_irq_count; i++) { 42673ed148aSBenjamin Herrenschmidt if (opal_irqs[i]) 427b0d436c7SAnton Blanchard free_irq(opal_irqs[i], NULL); 42873ed148aSBenjamin Herrenschmidt opal_irqs[i] = 0; 42973ed148aSBenjamin Herrenschmidt } 43073ed148aSBenjamin Herrenschmidt } 431