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> 206f68b5e2SVasant Hegde #include <linux/kobject.h> 2114a43e69SBenjamin Herrenschmidt #include <asm/opal.h> 2214a43e69SBenjamin Herrenschmidt #include <asm/firmware.h> 2314a43e69SBenjamin Herrenschmidt 2414a43e69SBenjamin Herrenschmidt #include "powernv.h" 2514a43e69SBenjamin Herrenschmidt 266f68b5e2SVasant Hegde /* /sys/firmware/opal */ 276f68b5e2SVasant Hegde struct kobject *opal_kobj; 286f68b5e2SVasant Hegde 2914a43e69SBenjamin Herrenschmidt struct opal { 3014a43e69SBenjamin Herrenschmidt u64 base; 3114a43e69SBenjamin Herrenschmidt u64 entry; 3214a43e69SBenjamin Herrenschmidt } opal; 3314a43e69SBenjamin Herrenschmidt 3414a43e69SBenjamin Herrenschmidt static struct device_node *opal_node; 3514a43e69SBenjamin Herrenschmidt static DEFINE_SPINLOCK(opal_write_lock); 36ed79ba9eSBenjamin Herrenschmidt extern u64 opal_mc_secondary_handler[]; 3773ed148aSBenjamin Herrenschmidt static unsigned int *opal_irqs; 3873ed148aSBenjamin Herrenschmidt static unsigned int opal_irq_count; 391bc98de2SGavin Shan static ATOMIC_NOTIFIER_HEAD(opal_notifier_head); 401bc98de2SGavin Shan static DEFINE_SPINLOCK(opal_notifier_lock); 411bc98de2SGavin Shan static uint64_t last_notified_mask = 0x0ul; 421bc98de2SGavin Shan static atomic_t opal_notifier_hold = ATOMIC_INIT(0); 4314a43e69SBenjamin Herrenschmidt 4414a43e69SBenjamin Herrenschmidt int __init early_init_dt_scan_opal(unsigned long node, 4514a43e69SBenjamin Herrenschmidt const char *uname, int depth, void *data) 4614a43e69SBenjamin Herrenschmidt { 4714a43e69SBenjamin Herrenschmidt const void *basep, *entryp; 4814a43e69SBenjamin Herrenschmidt unsigned long basesz, entrysz; 4914a43e69SBenjamin Herrenschmidt 5014a43e69SBenjamin Herrenschmidt if (depth != 1 || strcmp(uname, "ibm,opal") != 0) 5114a43e69SBenjamin Herrenschmidt return 0; 5214a43e69SBenjamin Herrenschmidt 5314a43e69SBenjamin Herrenschmidt basep = of_get_flat_dt_prop(node, "opal-base-address", &basesz); 5414a43e69SBenjamin Herrenschmidt entryp = of_get_flat_dt_prop(node, "opal-entry-address", &entrysz); 5514a43e69SBenjamin Herrenschmidt 5614a43e69SBenjamin Herrenschmidt if (!basep || !entryp) 5714a43e69SBenjamin Herrenschmidt return 1; 5814a43e69SBenjamin Herrenschmidt 5914a43e69SBenjamin Herrenschmidt opal.base = of_read_number(basep, basesz/4); 6014a43e69SBenjamin Herrenschmidt opal.entry = of_read_number(entryp, entrysz/4); 6114a43e69SBenjamin Herrenschmidt 6214a43e69SBenjamin Herrenschmidt pr_debug("OPAL Base = 0x%llx (basep=%p basesz=%ld)\n", 6314a43e69SBenjamin Herrenschmidt opal.base, basep, basesz); 6414a43e69SBenjamin Herrenschmidt pr_debug("OPAL Entry = 0x%llx (entryp=%p basesz=%ld)\n", 6514a43e69SBenjamin Herrenschmidt opal.entry, entryp, entrysz); 6614a43e69SBenjamin Herrenschmidt 6714a43e69SBenjamin Herrenschmidt powerpc_firmware_features |= FW_FEATURE_OPAL; 6875b93da4SBenjamin Herrenschmidt if (of_flat_dt_is_compatible(node, "ibm,opal-v3")) { 6975b93da4SBenjamin Herrenschmidt powerpc_firmware_features |= FW_FEATURE_OPALv2; 7075b93da4SBenjamin Herrenschmidt powerpc_firmware_features |= FW_FEATURE_OPALv3; 7175b93da4SBenjamin Herrenschmidt printk("OPAL V3 detected !\n"); 7275b93da4SBenjamin Herrenschmidt } else if (of_flat_dt_is_compatible(node, "ibm,opal-v2")) { 7314a43e69SBenjamin Herrenschmidt powerpc_firmware_features |= FW_FEATURE_OPALv2; 7414a43e69SBenjamin Herrenschmidt printk("OPAL V2 detected !\n"); 7514a43e69SBenjamin Herrenschmidt } else { 7614a43e69SBenjamin Herrenschmidt printk("OPAL V1 detected !\n"); 7714a43e69SBenjamin Herrenschmidt } 7814a43e69SBenjamin Herrenschmidt 79c4463b37SJeremy Kerr return 1; 80c4463b37SJeremy Kerr } 81c4463b37SJeremy Kerr 82c4463b37SJeremy Kerr static int __init opal_register_exception_handlers(void) 83c4463b37SJeremy Kerr { 8429186097SBenjamin Herrenschmidt #ifdef __BIG_ENDIAN__ 85c4463b37SJeremy Kerr u64 glue; 86c4463b37SJeremy Kerr 87c4463b37SJeremy Kerr if (!(powerpc_firmware_features & FW_FEATURE_OPAL)) 88c4463b37SJeremy Kerr return -ENODEV; 89c4463b37SJeremy Kerr 90ed79ba9eSBenjamin Herrenschmidt /* Hookup some exception handlers. We use the fwnmi area at 0x7000 91ed79ba9eSBenjamin Herrenschmidt * to provide the glue space to OPAL 92ed79ba9eSBenjamin Herrenschmidt */ 93ed79ba9eSBenjamin Herrenschmidt glue = 0x7000; 94ed79ba9eSBenjamin Herrenschmidt opal_register_exception_handler(OPAL_MACHINE_CHECK_HANDLER, 95ed79ba9eSBenjamin Herrenschmidt __pa(opal_mc_secondary_handler[0]), 96ed79ba9eSBenjamin Herrenschmidt glue); 97ed79ba9eSBenjamin Herrenschmidt glue += 128; 98ed79ba9eSBenjamin Herrenschmidt opal_register_exception_handler(OPAL_HYPERVISOR_MAINTENANCE_HANDLER, 99ed79ba9eSBenjamin Herrenschmidt 0, glue); 100ed79ba9eSBenjamin Herrenschmidt glue += 128; 101ed79ba9eSBenjamin Herrenschmidt opal_register_exception_handler(OPAL_SOFTPATCH_HANDLER, 0, glue); 10229186097SBenjamin Herrenschmidt #endif 103ed79ba9eSBenjamin Herrenschmidt 104c4463b37SJeremy Kerr return 0; 10514a43e69SBenjamin Herrenschmidt } 10614a43e69SBenjamin Herrenschmidt 107c4463b37SJeremy Kerr early_initcall(opal_register_exception_handlers); 108c4463b37SJeremy Kerr 1091bc98de2SGavin Shan int opal_notifier_register(struct notifier_block *nb) 1101bc98de2SGavin Shan { 1111bc98de2SGavin Shan if (!nb) { 1121bc98de2SGavin Shan pr_warning("%s: Invalid argument (%p)\n", 1131bc98de2SGavin Shan __func__, nb); 1141bc98de2SGavin Shan return -EINVAL; 1151bc98de2SGavin Shan } 1161bc98de2SGavin Shan 1171bc98de2SGavin Shan atomic_notifier_chain_register(&opal_notifier_head, nb); 1181bc98de2SGavin Shan return 0; 1191bc98de2SGavin Shan } 1201bc98de2SGavin Shan 1211bc98de2SGavin Shan static void opal_do_notifier(uint64_t events) 1221bc98de2SGavin Shan { 1231bc98de2SGavin Shan unsigned long flags; 1241bc98de2SGavin Shan uint64_t changed_mask; 1251bc98de2SGavin Shan 1261bc98de2SGavin Shan if (atomic_read(&opal_notifier_hold)) 1271bc98de2SGavin Shan return; 1281bc98de2SGavin Shan 1291bc98de2SGavin Shan spin_lock_irqsave(&opal_notifier_lock, flags); 1301bc98de2SGavin Shan changed_mask = last_notified_mask ^ events; 1311bc98de2SGavin Shan last_notified_mask = events; 1321bc98de2SGavin Shan spin_unlock_irqrestore(&opal_notifier_lock, flags); 1331bc98de2SGavin Shan 1341bc98de2SGavin Shan /* 1351bc98de2SGavin Shan * We feed with the event bits and changed bits for 1361bc98de2SGavin Shan * enough information to the callback. 1371bc98de2SGavin Shan */ 1381bc98de2SGavin Shan atomic_notifier_call_chain(&opal_notifier_head, 1391bc98de2SGavin Shan events, (void *)changed_mask); 1401bc98de2SGavin Shan } 1411bc98de2SGavin Shan 1421bc98de2SGavin Shan void opal_notifier_update_evt(uint64_t evt_mask, 1431bc98de2SGavin Shan uint64_t evt_val) 1441bc98de2SGavin Shan { 1451bc98de2SGavin Shan unsigned long flags; 1461bc98de2SGavin Shan 1471bc98de2SGavin Shan spin_lock_irqsave(&opal_notifier_lock, flags); 1481bc98de2SGavin Shan last_notified_mask &= ~evt_mask; 1491bc98de2SGavin Shan last_notified_mask |= evt_val; 1501bc98de2SGavin Shan spin_unlock_irqrestore(&opal_notifier_lock, flags); 1511bc98de2SGavin Shan } 1521bc98de2SGavin Shan 1531bc98de2SGavin Shan void opal_notifier_enable(void) 1541bc98de2SGavin Shan { 1551bc98de2SGavin Shan int64_t rc; 1561bc98de2SGavin Shan uint64_t evt = 0; 1571bc98de2SGavin Shan 1581bc98de2SGavin Shan atomic_set(&opal_notifier_hold, 0); 1591bc98de2SGavin Shan 1601bc98de2SGavin Shan /* Process pending events */ 1611bc98de2SGavin Shan rc = opal_poll_events(&evt); 1621bc98de2SGavin Shan if (rc == OPAL_SUCCESS && evt) 1631bc98de2SGavin Shan opal_do_notifier(evt); 1641bc98de2SGavin Shan } 1651bc98de2SGavin Shan 1661bc98de2SGavin Shan void opal_notifier_disable(void) 1671bc98de2SGavin Shan { 1681bc98de2SGavin Shan atomic_set(&opal_notifier_hold, 1); 1691bc98de2SGavin Shan } 1701bc98de2SGavin Shan 17114a43e69SBenjamin Herrenschmidt int opal_get_chars(uint32_t vtermno, char *buf, int count) 17214a43e69SBenjamin Herrenschmidt { 1734f89363bSBenjamin Herrenschmidt s64 rc; 1744f89363bSBenjamin Herrenschmidt __be64 evt, len; 17514a43e69SBenjamin Herrenschmidt 17614a43e69SBenjamin Herrenschmidt if (!opal.entry) 177daea1175SBenjamin Herrenschmidt return -ENODEV; 17814a43e69SBenjamin Herrenschmidt opal_poll_events(&evt); 1794f89363bSBenjamin Herrenschmidt if ((be64_to_cpu(evt) & OPAL_EVENT_CONSOLE_INPUT) == 0) 18014a43e69SBenjamin Herrenschmidt return 0; 1814f89363bSBenjamin Herrenschmidt len = cpu_to_be64(count); 18214a43e69SBenjamin Herrenschmidt rc = opal_console_read(vtermno, &len, buf); 18314a43e69SBenjamin Herrenschmidt if (rc == OPAL_SUCCESS) 1844f89363bSBenjamin Herrenschmidt return be64_to_cpu(len); 18514a43e69SBenjamin Herrenschmidt return 0; 18614a43e69SBenjamin Herrenschmidt } 18714a43e69SBenjamin Herrenschmidt 18814a43e69SBenjamin Herrenschmidt int opal_put_chars(uint32_t vtermno, const char *data, int total_len) 18914a43e69SBenjamin Herrenschmidt { 19014a43e69SBenjamin Herrenschmidt int written = 0; 1914f89363bSBenjamin Herrenschmidt __be64 olen; 192daea1175SBenjamin Herrenschmidt s64 len, rc; 19314a43e69SBenjamin Herrenschmidt unsigned long flags; 1944f89363bSBenjamin Herrenschmidt __be64 evt; 19514a43e69SBenjamin Herrenschmidt 19614a43e69SBenjamin Herrenschmidt if (!opal.entry) 197daea1175SBenjamin Herrenschmidt return -ENODEV; 19814a43e69SBenjamin Herrenschmidt 19914a43e69SBenjamin Herrenschmidt /* We want put_chars to be atomic to avoid mangling of hvsi 20014a43e69SBenjamin Herrenschmidt * packets. To do that, we first test for room and return 201daea1175SBenjamin Herrenschmidt * -EAGAIN if there isn't enough. 202daea1175SBenjamin Herrenschmidt * 203daea1175SBenjamin Herrenschmidt * Unfortunately, opal_console_write_buffer_space() doesn't 204daea1175SBenjamin Herrenschmidt * appear to work on opal v1, so we just assume there is 205daea1175SBenjamin Herrenschmidt * enough room and be done with it 20614a43e69SBenjamin Herrenschmidt */ 20714a43e69SBenjamin Herrenschmidt spin_lock_irqsave(&opal_write_lock, flags); 208daea1175SBenjamin Herrenschmidt if (firmware_has_feature(FW_FEATURE_OPALv2)) { 2094f89363bSBenjamin Herrenschmidt rc = opal_console_write_buffer_space(vtermno, &olen); 2104f89363bSBenjamin Herrenschmidt len = be64_to_cpu(olen); 21114a43e69SBenjamin Herrenschmidt if (rc || len < total_len) { 21214a43e69SBenjamin Herrenschmidt spin_unlock_irqrestore(&opal_write_lock, flags); 21314a43e69SBenjamin Herrenschmidt /* Closed -> drop characters */ 21414a43e69SBenjamin Herrenschmidt if (rc) 21514a43e69SBenjamin Herrenschmidt return total_len; 2164f89363bSBenjamin Herrenschmidt opal_poll_events(NULL); 21714a43e69SBenjamin Herrenschmidt return -EAGAIN; 21814a43e69SBenjamin Herrenschmidt } 219daea1175SBenjamin Herrenschmidt } 22014a43e69SBenjamin Herrenschmidt 22114a43e69SBenjamin Herrenschmidt /* We still try to handle partial completions, though they 22214a43e69SBenjamin Herrenschmidt * should no longer happen. 22314a43e69SBenjamin Herrenschmidt */ 224daea1175SBenjamin Herrenschmidt rc = OPAL_BUSY; 22514a43e69SBenjamin Herrenschmidt while(total_len > 0 && (rc == OPAL_BUSY || 22614a43e69SBenjamin Herrenschmidt rc == OPAL_BUSY_EVENT || rc == OPAL_SUCCESS)) { 2274f89363bSBenjamin Herrenschmidt olen = cpu_to_be64(total_len); 2284f89363bSBenjamin Herrenschmidt rc = opal_console_write(vtermno, &olen, data); 2294f89363bSBenjamin Herrenschmidt len = be64_to_cpu(olen); 2301de1455fSBenjamin Herrenschmidt 2311de1455fSBenjamin Herrenschmidt /* Closed or other error drop */ 2321de1455fSBenjamin Herrenschmidt if (rc != OPAL_SUCCESS && rc != OPAL_BUSY && 2331de1455fSBenjamin Herrenschmidt rc != OPAL_BUSY_EVENT) { 2341de1455fSBenjamin Herrenschmidt written = total_len; 2351de1455fSBenjamin Herrenschmidt break; 2361de1455fSBenjamin Herrenschmidt } 23714a43e69SBenjamin Herrenschmidt if (rc == OPAL_SUCCESS) { 23814a43e69SBenjamin Herrenschmidt total_len -= len; 23914a43e69SBenjamin Herrenschmidt data += len; 24014a43e69SBenjamin Herrenschmidt written += len; 24114a43e69SBenjamin Herrenschmidt } 24214a43e69SBenjamin Herrenschmidt /* This is a bit nasty but we need that for the console to 24314a43e69SBenjamin Herrenschmidt * flush when there aren't any interrupts. We will clean 24414a43e69SBenjamin Herrenschmidt * things a bit later to limit that to synchronous path 24514a43e69SBenjamin Herrenschmidt * such as the kernel console and xmon/udbg 24614a43e69SBenjamin Herrenschmidt */ 24714a43e69SBenjamin Herrenschmidt do 24814a43e69SBenjamin Herrenschmidt opal_poll_events(&evt); 2494f89363bSBenjamin Herrenschmidt while(rc == OPAL_SUCCESS && 2504f89363bSBenjamin Herrenschmidt (be64_to_cpu(evt) & OPAL_EVENT_CONSOLE_OUTPUT)); 25114a43e69SBenjamin Herrenschmidt } 25214a43e69SBenjamin Herrenschmidt spin_unlock_irqrestore(&opal_write_lock, flags); 25314a43e69SBenjamin Herrenschmidt return written; 25414a43e69SBenjamin Herrenschmidt } 25514a43e69SBenjamin Herrenschmidt 256ed79ba9eSBenjamin Herrenschmidt int opal_machine_check(struct pt_regs *regs) 257ed79ba9eSBenjamin Herrenschmidt { 258ed79ba9eSBenjamin Herrenschmidt struct opal_machine_check_event *opal_evt = get_paca()->opal_mc_evt; 259ed79ba9eSBenjamin Herrenschmidt struct opal_machine_check_event evt; 260ed79ba9eSBenjamin Herrenschmidt const char *level, *sevstr, *subtype; 261ed79ba9eSBenjamin Herrenschmidt static const char *opal_mc_ue_types[] = { 262ed79ba9eSBenjamin Herrenschmidt "Indeterminate", 263ed79ba9eSBenjamin Herrenschmidt "Instruction fetch", 264ed79ba9eSBenjamin Herrenschmidt "Page table walk ifetch", 265ed79ba9eSBenjamin Herrenschmidt "Load/Store", 266ed79ba9eSBenjamin Herrenschmidt "Page table walk Load/Store", 267ed79ba9eSBenjamin Herrenschmidt }; 268ed79ba9eSBenjamin Herrenschmidt static const char *opal_mc_slb_types[] = { 269ed79ba9eSBenjamin Herrenschmidt "Indeterminate", 270ed79ba9eSBenjamin Herrenschmidt "Parity", 271ed79ba9eSBenjamin Herrenschmidt "Multihit", 272ed79ba9eSBenjamin Herrenschmidt }; 273ed79ba9eSBenjamin Herrenschmidt static const char *opal_mc_erat_types[] = { 274ed79ba9eSBenjamin Herrenschmidt "Indeterminate", 275ed79ba9eSBenjamin Herrenschmidt "Parity", 276ed79ba9eSBenjamin Herrenschmidt "Multihit", 277ed79ba9eSBenjamin Herrenschmidt }; 278ed79ba9eSBenjamin Herrenschmidt static const char *opal_mc_tlb_types[] = { 279ed79ba9eSBenjamin Herrenschmidt "Indeterminate", 280ed79ba9eSBenjamin Herrenschmidt "Parity", 281ed79ba9eSBenjamin Herrenschmidt "Multihit", 282ed79ba9eSBenjamin Herrenschmidt }; 283ed79ba9eSBenjamin Herrenschmidt 284ed79ba9eSBenjamin Herrenschmidt /* Copy the event structure and release the original */ 285ed79ba9eSBenjamin Herrenschmidt evt = *opal_evt; 286ed79ba9eSBenjamin Herrenschmidt opal_evt->in_use = 0; 287ed79ba9eSBenjamin Herrenschmidt 288ed79ba9eSBenjamin Herrenschmidt /* Print things out */ 289ed79ba9eSBenjamin Herrenschmidt if (evt.version != OpalMCE_V1) { 290ed79ba9eSBenjamin Herrenschmidt pr_err("Machine Check Exception, Unknown event version %d !\n", 291ed79ba9eSBenjamin Herrenschmidt evt.version); 292ed79ba9eSBenjamin Herrenschmidt return 0; 293ed79ba9eSBenjamin Herrenschmidt } 294ed79ba9eSBenjamin Herrenschmidt switch(evt.severity) { 295ed79ba9eSBenjamin Herrenschmidt case OpalMCE_SEV_NO_ERROR: 296ed79ba9eSBenjamin Herrenschmidt level = KERN_INFO; 297ed79ba9eSBenjamin Herrenschmidt sevstr = "Harmless"; 298ed79ba9eSBenjamin Herrenschmidt break; 299ed79ba9eSBenjamin Herrenschmidt case OpalMCE_SEV_WARNING: 300ed79ba9eSBenjamin Herrenschmidt level = KERN_WARNING; 301ed79ba9eSBenjamin Herrenschmidt sevstr = ""; 302ed79ba9eSBenjamin Herrenschmidt break; 303ed79ba9eSBenjamin Herrenschmidt case OpalMCE_SEV_ERROR_SYNC: 304ed79ba9eSBenjamin Herrenschmidt level = KERN_ERR; 305ed79ba9eSBenjamin Herrenschmidt sevstr = "Severe"; 306ed79ba9eSBenjamin Herrenschmidt break; 307ed79ba9eSBenjamin Herrenschmidt case OpalMCE_SEV_FATAL: 308ed79ba9eSBenjamin Herrenschmidt default: 309ed79ba9eSBenjamin Herrenschmidt level = KERN_ERR; 310ed79ba9eSBenjamin Herrenschmidt sevstr = "Fatal"; 311ed79ba9eSBenjamin Herrenschmidt break; 312ed79ba9eSBenjamin Herrenschmidt } 313ed79ba9eSBenjamin Herrenschmidt 314ed79ba9eSBenjamin Herrenschmidt printk("%s%s Machine check interrupt [%s]\n", level, sevstr, 315ed79ba9eSBenjamin Herrenschmidt evt.disposition == OpalMCE_DISPOSITION_RECOVERED ? 316ed79ba9eSBenjamin Herrenschmidt "Recovered" : "[Not recovered"); 317ed79ba9eSBenjamin Herrenschmidt printk("%s Initiator: %s\n", level, 318ed79ba9eSBenjamin Herrenschmidt evt.initiator == OpalMCE_INITIATOR_CPU ? "CPU" : "Unknown"); 319ed79ba9eSBenjamin Herrenschmidt switch(evt.error_type) { 320ed79ba9eSBenjamin Herrenschmidt case OpalMCE_ERROR_TYPE_UE: 321ed79ba9eSBenjamin Herrenschmidt subtype = evt.u.ue_error.ue_error_type < 322ed79ba9eSBenjamin Herrenschmidt ARRAY_SIZE(opal_mc_ue_types) ? 323ed79ba9eSBenjamin Herrenschmidt opal_mc_ue_types[evt.u.ue_error.ue_error_type] 324ed79ba9eSBenjamin Herrenschmidt : "Unknown"; 325ed79ba9eSBenjamin Herrenschmidt printk("%s Error type: UE [%s]\n", level, subtype); 326ed79ba9eSBenjamin Herrenschmidt if (evt.u.ue_error.effective_address_provided) 327ed79ba9eSBenjamin Herrenschmidt printk("%s Effective address: %016llx\n", 328ed79ba9eSBenjamin Herrenschmidt level, evt.u.ue_error.effective_address); 329ed79ba9eSBenjamin Herrenschmidt if (evt.u.ue_error.physical_address_provided) 330ed79ba9eSBenjamin Herrenschmidt printk("%s Physial address: %016llx\n", 331ed79ba9eSBenjamin Herrenschmidt level, evt.u.ue_error.physical_address); 332ed79ba9eSBenjamin Herrenschmidt break; 333ed79ba9eSBenjamin Herrenschmidt case OpalMCE_ERROR_TYPE_SLB: 334ed79ba9eSBenjamin Herrenschmidt subtype = evt.u.slb_error.slb_error_type < 335ed79ba9eSBenjamin Herrenschmidt ARRAY_SIZE(opal_mc_slb_types) ? 336ed79ba9eSBenjamin Herrenschmidt opal_mc_slb_types[evt.u.slb_error.slb_error_type] 337ed79ba9eSBenjamin Herrenschmidt : "Unknown"; 338ed79ba9eSBenjamin Herrenschmidt printk("%s Error type: SLB [%s]\n", level, subtype); 339ed79ba9eSBenjamin Herrenschmidt if (evt.u.slb_error.effective_address_provided) 340ed79ba9eSBenjamin Herrenschmidt printk("%s Effective address: %016llx\n", 341ed79ba9eSBenjamin Herrenschmidt level, evt.u.slb_error.effective_address); 342ed79ba9eSBenjamin Herrenschmidt break; 343ed79ba9eSBenjamin Herrenschmidt case OpalMCE_ERROR_TYPE_ERAT: 344ed79ba9eSBenjamin Herrenschmidt subtype = evt.u.erat_error.erat_error_type < 345ed79ba9eSBenjamin Herrenschmidt ARRAY_SIZE(opal_mc_erat_types) ? 346ed79ba9eSBenjamin Herrenschmidt opal_mc_erat_types[evt.u.erat_error.erat_error_type] 347ed79ba9eSBenjamin Herrenschmidt : "Unknown"; 348ed79ba9eSBenjamin Herrenschmidt printk("%s Error type: ERAT [%s]\n", level, subtype); 349ed79ba9eSBenjamin Herrenschmidt if (evt.u.erat_error.effective_address_provided) 350ed79ba9eSBenjamin Herrenschmidt printk("%s Effective address: %016llx\n", 351ed79ba9eSBenjamin Herrenschmidt level, evt.u.erat_error.effective_address); 352ed79ba9eSBenjamin Herrenschmidt break; 353ed79ba9eSBenjamin Herrenschmidt case OpalMCE_ERROR_TYPE_TLB: 354ed79ba9eSBenjamin Herrenschmidt subtype = evt.u.tlb_error.tlb_error_type < 355ed79ba9eSBenjamin Herrenschmidt ARRAY_SIZE(opal_mc_tlb_types) ? 356ed79ba9eSBenjamin Herrenschmidt opal_mc_tlb_types[evt.u.tlb_error.tlb_error_type] 357ed79ba9eSBenjamin Herrenschmidt : "Unknown"; 358ed79ba9eSBenjamin Herrenschmidt printk("%s Error type: TLB [%s]\n", level, subtype); 359ed79ba9eSBenjamin Herrenschmidt if (evt.u.tlb_error.effective_address_provided) 360ed79ba9eSBenjamin Herrenschmidt printk("%s Effective address: %016llx\n", 361ed79ba9eSBenjamin Herrenschmidt level, evt.u.tlb_error.effective_address); 362ed79ba9eSBenjamin Herrenschmidt break; 363ed79ba9eSBenjamin Herrenschmidt default: 364ed79ba9eSBenjamin Herrenschmidt case OpalMCE_ERROR_TYPE_UNKNOWN: 365ed79ba9eSBenjamin Herrenschmidt printk("%s Error type: Unknown\n", level); 366ed79ba9eSBenjamin Herrenschmidt break; 367ed79ba9eSBenjamin Herrenschmidt } 368ed79ba9eSBenjamin Herrenschmidt return evt.severity == OpalMCE_SEV_FATAL ? 0 : 1; 369ed79ba9eSBenjamin Herrenschmidt } 370ed79ba9eSBenjamin Herrenschmidt 371a125e092SBenjamin Herrenschmidt static irqreturn_t opal_interrupt(int irq, void *data) 372a125e092SBenjamin Herrenschmidt { 3735e4da530SAnton Blanchard __be64 events; 374a125e092SBenjamin Herrenschmidt 375a125e092SBenjamin Herrenschmidt opal_handle_interrupt(virq_to_hw(irq), &events); 376a125e092SBenjamin Herrenschmidt 3771bc98de2SGavin Shan opal_do_notifier(events); 378a125e092SBenjamin Herrenschmidt 379a125e092SBenjamin Herrenschmidt return IRQ_HANDLED; 380a125e092SBenjamin Herrenschmidt } 381a125e092SBenjamin Herrenschmidt 3826f68b5e2SVasant Hegde static int opal_sysfs_init(void) 3836f68b5e2SVasant Hegde { 3846f68b5e2SVasant Hegde opal_kobj = kobject_create_and_add("opal", firmware_kobj); 3856f68b5e2SVasant Hegde if (!opal_kobj) { 3866f68b5e2SVasant Hegde pr_warn("kobject_create_and_add opal failed\n"); 3876f68b5e2SVasant Hegde return -ENOMEM; 3886f68b5e2SVasant Hegde } 3896f68b5e2SVasant Hegde 3906f68b5e2SVasant Hegde return 0; 3916f68b5e2SVasant Hegde } 3926f68b5e2SVasant Hegde 39314a43e69SBenjamin Herrenschmidt static int __init opal_init(void) 39414a43e69SBenjamin Herrenschmidt { 39514a43e69SBenjamin Herrenschmidt struct device_node *np, *consoles; 3961cc79bc8SAlistair Popple const __be32 *irqs; 397a125e092SBenjamin Herrenschmidt int rc, i, irqlen; 39814a43e69SBenjamin Herrenschmidt 39914a43e69SBenjamin Herrenschmidt opal_node = of_find_node_by_path("/ibm,opal"); 40014a43e69SBenjamin Herrenschmidt if (!opal_node) { 40114a43e69SBenjamin Herrenschmidt pr_warn("opal: Node not found\n"); 40214a43e69SBenjamin Herrenschmidt return -ENODEV; 40314a43e69SBenjamin Herrenschmidt } 4042db29d28SBenjamin Herrenschmidt 4052db29d28SBenjamin Herrenschmidt /* Register OPAL consoles if any ports */ 40614a43e69SBenjamin Herrenschmidt if (firmware_has_feature(FW_FEATURE_OPALv2)) 40714a43e69SBenjamin Herrenschmidt consoles = of_find_node_by_path("/ibm,opal/consoles"); 40814a43e69SBenjamin Herrenschmidt else 40914a43e69SBenjamin Herrenschmidt consoles = of_node_get(opal_node); 4102db29d28SBenjamin Herrenschmidt if (consoles) { 41114a43e69SBenjamin Herrenschmidt for_each_child_of_node(consoles, np) { 41214a43e69SBenjamin Herrenschmidt if (strcmp(np->name, "serial")) 41314a43e69SBenjamin Herrenschmidt continue; 41414a43e69SBenjamin Herrenschmidt of_platform_device_create(np, NULL, NULL); 41514a43e69SBenjamin Herrenschmidt } 41614a43e69SBenjamin Herrenschmidt of_node_put(consoles); 4172db29d28SBenjamin Herrenschmidt } 418a125e092SBenjamin Herrenschmidt 419a125e092SBenjamin Herrenschmidt /* Find all OPAL interrupts and request them */ 420a125e092SBenjamin Herrenschmidt irqs = of_get_property(opal_node, "opal-interrupts", &irqlen); 421a125e092SBenjamin Herrenschmidt pr_debug("opal: Found %d interrupts reserved for OPAL\n", 422a125e092SBenjamin Herrenschmidt irqs ? (irqlen / 4) : 0); 42373ed148aSBenjamin Herrenschmidt opal_irq_count = irqlen / 4; 42473ed148aSBenjamin Herrenschmidt opal_irqs = kzalloc(opal_irq_count * sizeof(unsigned int), GFP_KERNEL); 425a125e092SBenjamin Herrenschmidt for (i = 0; irqs && i < (irqlen / 4); i++, irqs++) { 426a125e092SBenjamin Herrenschmidt unsigned int hwirq = be32_to_cpup(irqs); 427a125e092SBenjamin Herrenschmidt unsigned int irq = irq_create_mapping(NULL, hwirq); 428a125e092SBenjamin Herrenschmidt if (irq == NO_IRQ) { 429a125e092SBenjamin Herrenschmidt pr_warning("opal: Failed to map irq 0x%x\n", hwirq); 430a125e092SBenjamin Herrenschmidt continue; 431a125e092SBenjamin Herrenschmidt } 432a125e092SBenjamin Herrenschmidt rc = request_irq(irq, opal_interrupt, 0, "opal", NULL); 433a125e092SBenjamin Herrenschmidt if (rc) 434a125e092SBenjamin Herrenschmidt pr_warning("opal: Error %d requesting irq %d" 435a125e092SBenjamin Herrenschmidt " (0x%x)\n", rc, irq, hwirq); 43673ed148aSBenjamin Herrenschmidt opal_irqs[i] = irq; 437a125e092SBenjamin Herrenschmidt } 4386f68b5e2SVasant Hegde 4396f68b5e2SVasant Hegde /* Create "opal" kobject under /sys/firmware */ 4406f68b5e2SVasant Hegde rc = opal_sysfs_init(); 44150bd6153SVasant Hegde if (rc == 0) { 44250bd6153SVasant Hegde /* Setup code update interface */ 44350bd6153SVasant Hegde opal_flash_init(); 44450bd6153SVasant Hegde } 4456f68b5e2SVasant Hegde 44614a43e69SBenjamin Herrenschmidt return 0; 44714a43e69SBenjamin Herrenschmidt } 44814a43e69SBenjamin Herrenschmidt subsys_initcall(opal_init); 44973ed148aSBenjamin Herrenschmidt 45073ed148aSBenjamin Herrenschmidt void opal_shutdown(void) 45173ed148aSBenjamin Herrenschmidt { 45273ed148aSBenjamin Herrenschmidt unsigned int i; 45373ed148aSBenjamin Herrenschmidt 45473ed148aSBenjamin Herrenschmidt for (i = 0; i < opal_irq_count; i++) { 45573ed148aSBenjamin Herrenschmidt if (opal_irqs[i]) 456b0d436c7SAnton Blanchard free_irq(opal_irqs[i], NULL); 45773ed148aSBenjamin Herrenschmidt opal_irqs[i] = 0; 45873ed148aSBenjamin Herrenschmidt } 45973ed148aSBenjamin Herrenschmidt } 460