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 12c8742f85SBenjamin Herrenschmidt #define pr_fmt(fmt) "opal: " fmt 1314a43e69SBenjamin Herrenschmidt 14c8742f85SBenjamin Herrenschmidt #include <linux/printk.h> 1514a43e69SBenjamin Herrenschmidt #include <linux/types.h> 1614a43e69SBenjamin Herrenschmidt #include <linux/of.h> 1726a2056eSRob Herring #include <linux/of_fdt.h> 1814a43e69SBenjamin Herrenschmidt #include <linux/of_platform.h> 198f95faaaSMadhavan Srinivasan #include <linux/of_address.h> 20a125e092SBenjamin Herrenschmidt #include <linux/interrupt.h> 211bc98de2SGavin Shan #include <linux/notifier.h> 2273ed148aSBenjamin Herrenschmidt #include <linux/slab.h> 23b63a0ffeSMahesh Salgaonkar #include <linux/sched.h> 246f68b5e2SVasant Hegde #include <linux/kobject.h> 25f7d98d18SVasant Hegde #include <linux/delay.h> 2655672ecfSMahesh Salgaonkar #include <linux/memblock.h> 273bf57561SBenjamin Herrenschmidt #include <linux/kthread.h> 283bf57561SBenjamin Herrenschmidt #include <linux/freezer.h> 29b746e3e0SNicholas Piggin #include <linux/printk.h> 30b746e3e0SNicholas Piggin #include <linux/kmsg_dump.h> 31b746e3e0SNicholas Piggin #include <linux/console.h> 32b746e3e0SNicholas Piggin #include <linux/sched/debug.h> 33b14726c5SMichael Ellerman 34b14726c5SMichael Ellerman #include <asm/machdep.h> 3514a43e69SBenjamin Herrenschmidt #include <asm/opal.h> 3614a43e69SBenjamin Herrenschmidt #include <asm/firmware.h> 3736df96f8SMahesh Salgaonkar #include <asm/mce.h> 388f95faaaSMadhavan Srinivasan #include <asm/imc-pmu.h> 396fcd6baaSNicholas Piggin #include <asm/bug.h> 4014a43e69SBenjamin Herrenschmidt 4114a43e69SBenjamin Herrenschmidt #include "powernv.h" 4214a43e69SBenjamin Herrenschmidt 436f68b5e2SVasant Hegde /* /sys/firmware/opal */ 446f68b5e2SVasant Hegde struct kobject *opal_kobj; 456f68b5e2SVasant Hegde 4614a43e69SBenjamin Herrenschmidt struct opal { 4714a43e69SBenjamin Herrenschmidt u64 base; 4814a43e69SBenjamin Herrenschmidt u64 entry; 4955672ecfSMahesh Salgaonkar u64 size; 5014a43e69SBenjamin Herrenschmidt } opal; 5114a43e69SBenjamin Herrenschmidt 5255672ecfSMahesh Salgaonkar struct mcheck_recoverable_range { 5355672ecfSMahesh Salgaonkar u64 start_addr; 5455672ecfSMahesh Salgaonkar u64 end_addr; 5555672ecfSMahesh Salgaonkar u64 recover_addr; 5655672ecfSMahesh Salgaonkar }; 5755672ecfSMahesh Salgaonkar 5855672ecfSMahesh Salgaonkar static struct mcheck_recoverable_range *mc_recoverable_range; 5955672ecfSMahesh Salgaonkar static int mc_recoverable_range_len; 6055672ecfSMahesh Salgaonkar 61bfc36894SJoel Stanley struct device_node *opal_node; 6214a43e69SBenjamin Herrenschmidt static DEFINE_SPINLOCK(opal_write_lock); 6324366360SMahesh Salgaonkar static struct atomic_notifier_head opal_msg_notifier_head[OPAL_MSG_TYPE_MAX]; 643bf57561SBenjamin Herrenschmidt static uint32_t opal_heartbeat; 65a203658bSBenjamin Herrenschmidt static struct task_struct *kopald_tsk; 6614a43e69SBenjamin Herrenschmidt 67d3cbff1bSBenjamin Herrenschmidt void opal_configure_cores(void) 684926616cSBenjamin Herrenschmidt { 691c0eaf0fSBenjamin Herrenschmidt u64 reinit_flags = 0; 701c0eaf0fSBenjamin Herrenschmidt 714926616cSBenjamin Herrenschmidt /* Do the actual re-init, This will clobber all FPRs, VRs, etc... 724926616cSBenjamin Herrenschmidt * 734926616cSBenjamin Herrenschmidt * It will preserve non volatile GPRs and HSPRG0/1. It will 744926616cSBenjamin Herrenschmidt * also restore HIDs and other SPRs to their original value 754926616cSBenjamin Herrenschmidt * but it might clobber a bunch. 764926616cSBenjamin Herrenschmidt */ 774926616cSBenjamin Herrenschmidt #ifdef __BIG_ENDIAN__ 781c0eaf0fSBenjamin Herrenschmidt reinit_flags |= OPAL_REINIT_CPUS_HILE_BE; 794926616cSBenjamin Herrenschmidt #else 801c0eaf0fSBenjamin Herrenschmidt reinit_flags |= OPAL_REINIT_CPUS_HILE_LE; 814926616cSBenjamin Herrenschmidt #endif 82d3cbff1bSBenjamin Herrenschmidt 831c0eaf0fSBenjamin Herrenschmidt /* 841c0eaf0fSBenjamin Herrenschmidt * POWER9 always support running hash: 851c0eaf0fSBenjamin Herrenschmidt * ie. Host hash supports hash guests 861c0eaf0fSBenjamin Herrenschmidt * Host radix supports hash/radix guests 871c0eaf0fSBenjamin Herrenschmidt */ 88a70b487bSMichael Ellerman if (early_cpu_has_feature(CPU_FTR_ARCH_300)) { 891c0eaf0fSBenjamin Herrenschmidt reinit_flags |= OPAL_REINIT_CPUS_MMU_HASH; 901c0eaf0fSBenjamin Herrenschmidt if (early_radix_enabled()) 911c0eaf0fSBenjamin Herrenschmidt reinit_flags |= OPAL_REINIT_CPUS_MMU_RADIX; 921c0eaf0fSBenjamin Herrenschmidt } 931c0eaf0fSBenjamin Herrenschmidt 941c0eaf0fSBenjamin Herrenschmidt opal_reinit_cpus(reinit_flags); 951c0eaf0fSBenjamin Herrenschmidt 96d3cbff1bSBenjamin Herrenschmidt /* Restore some bits */ 97d3cbff1bSBenjamin Herrenschmidt if (cur_cpu_spec->cpu_restore) 98d3cbff1bSBenjamin Herrenschmidt cur_cpu_spec->cpu_restore(); 994926616cSBenjamin Herrenschmidt } 1004926616cSBenjamin Herrenschmidt 10114a43e69SBenjamin Herrenschmidt int __init early_init_dt_scan_opal(unsigned long node, 10214a43e69SBenjamin Herrenschmidt const char *uname, int depth, void *data) 10314a43e69SBenjamin Herrenschmidt { 10455672ecfSMahesh Salgaonkar const void *basep, *entryp, *sizep; 1059d0c4dfeSRob Herring int basesz, entrysz, runtimesz; 10614a43e69SBenjamin Herrenschmidt 10714a43e69SBenjamin Herrenschmidt if (depth != 1 || strcmp(uname, "ibm,opal") != 0) 10814a43e69SBenjamin Herrenschmidt return 0; 10914a43e69SBenjamin Herrenschmidt 11014a43e69SBenjamin Herrenschmidt basep = of_get_flat_dt_prop(node, "opal-base-address", &basesz); 11114a43e69SBenjamin Herrenschmidt entryp = of_get_flat_dt_prop(node, "opal-entry-address", &entrysz); 11255672ecfSMahesh Salgaonkar sizep = of_get_flat_dt_prop(node, "opal-runtime-size", &runtimesz); 11314a43e69SBenjamin Herrenschmidt 11455672ecfSMahesh Salgaonkar if (!basep || !entryp || !sizep) 11514a43e69SBenjamin Herrenschmidt return 1; 11614a43e69SBenjamin Herrenschmidt 11714a43e69SBenjamin Herrenschmidt opal.base = of_read_number(basep, basesz/4); 11814a43e69SBenjamin Herrenschmidt opal.entry = of_read_number(entryp, entrysz/4); 11955672ecfSMahesh Salgaonkar opal.size = of_read_number(sizep, runtimesz/4); 12014a43e69SBenjamin Herrenschmidt 1219d0c4dfeSRob Herring pr_debug("OPAL Base = 0x%llx (basep=%p basesz=%d)\n", 12214a43e69SBenjamin Herrenschmidt opal.base, basep, basesz); 1239d0c4dfeSRob Herring pr_debug("OPAL Entry = 0x%llx (entryp=%p basesz=%d)\n", 12414a43e69SBenjamin Herrenschmidt opal.entry, entryp, entrysz); 1259d0c4dfeSRob Herring pr_debug("OPAL Entry = 0x%llx (sizep=%p runtimesz=%d)\n", 12655672ecfSMahesh Salgaonkar opal.size, sizep, runtimesz); 12714a43e69SBenjamin Herrenschmidt 12875b93da4SBenjamin Herrenschmidt if (of_flat_dt_is_compatible(node, "ibm,opal-v3")) { 129e4d54f71SStewart Smith powerpc_firmware_features |= FW_FEATURE_OPAL; 1305138b314SBenjamin Herrenschmidt pr_debug("OPAL detected !\n"); 13114a43e69SBenjamin Herrenschmidt } else { 132786842b6SStewart Smith panic("OPAL != V3 detected, no longer supported.\n"); 13314a43e69SBenjamin Herrenschmidt } 13414a43e69SBenjamin Herrenschmidt 135c4463b37SJeremy Kerr return 1; 136c4463b37SJeremy Kerr } 137c4463b37SJeremy Kerr 13855672ecfSMahesh Salgaonkar int __init early_init_dt_scan_recoverable_ranges(unsigned long node, 13955672ecfSMahesh Salgaonkar const char *uname, int depth, void *data) 14055672ecfSMahesh Salgaonkar { 1419d0c4dfeSRob Herring int i, psize, size; 14255672ecfSMahesh Salgaonkar const __be32 *prop; 14355672ecfSMahesh Salgaonkar 14455672ecfSMahesh Salgaonkar if (depth != 1 || strcmp(uname, "ibm,opal") != 0) 14555672ecfSMahesh Salgaonkar return 0; 14655672ecfSMahesh Salgaonkar 1476e556b47SMahesh Salgaonkar prop = of_get_flat_dt_prop(node, "mcheck-recoverable-ranges", &psize); 14855672ecfSMahesh Salgaonkar 14955672ecfSMahesh Salgaonkar if (!prop) 15055672ecfSMahesh Salgaonkar return 1; 15155672ecfSMahesh Salgaonkar 15255672ecfSMahesh Salgaonkar pr_debug("Found machine check recoverable ranges.\n"); 15355672ecfSMahesh Salgaonkar 15455672ecfSMahesh Salgaonkar /* 1556e556b47SMahesh Salgaonkar * Calculate number of available entries. 1566e556b47SMahesh Salgaonkar * 1576e556b47SMahesh Salgaonkar * Each recoverable address range entry is (start address, len, 1586e556b47SMahesh Salgaonkar * recovery address), 2 cells each for start and recovery address, 1596e556b47SMahesh Salgaonkar * 1 cell for len, totalling 5 cells per entry. 1606e556b47SMahesh Salgaonkar */ 1616e556b47SMahesh Salgaonkar mc_recoverable_range_len = psize / (sizeof(*prop) * 5); 1626e556b47SMahesh Salgaonkar 1636e556b47SMahesh Salgaonkar /* Sanity check */ 1646e556b47SMahesh Salgaonkar if (!mc_recoverable_range_len) 1656e556b47SMahesh Salgaonkar return 1; 1666e556b47SMahesh Salgaonkar 1676e556b47SMahesh Salgaonkar /* Size required to hold all the entries. */ 1686e556b47SMahesh Salgaonkar size = mc_recoverable_range_len * 1696e556b47SMahesh Salgaonkar sizeof(struct mcheck_recoverable_range); 1706e556b47SMahesh Salgaonkar 1716e556b47SMahesh Salgaonkar /* 17276b42e28SNicholas Piggin * Allocate a buffer to hold the MC recoverable ranges. 17355672ecfSMahesh Salgaonkar */ 174b63a07d6SMike Rapoport mc_recoverable_range = memblock_alloc(size, __alignof__(u64)); 17555672ecfSMahesh Salgaonkar 1766e556b47SMahesh Salgaonkar for (i = 0; i < mc_recoverable_range_len; i++) { 17755672ecfSMahesh Salgaonkar mc_recoverable_range[i].start_addr = 17855672ecfSMahesh Salgaonkar of_read_number(prop + (i * 5) + 0, 2); 17955672ecfSMahesh Salgaonkar mc_recoverable_range[i].end_addr = 18055672ecfSMahesh Salgaonkar mc_recoverable_range[i].start_addr + 18155672ecfSMahesh Salgaonkar of_read_number(prop + (i * 5) + 2, 1); 18255672ecfSMahesh Salgaonkar mc_recoverable_range[i].recover_addr = 18355672ecfSMahesh Salgaonkar of_read_number(prop + (i * 5) + 3, 2); 18455672ecfSMahesh Salgaonkar 18555672ecfSMahesh Salgaonkar pr_debug("Machine check recoverable range: %llx..%llx: %llx\n", 18655672ecfSMahesh Salgaonkar mc_recoverable_range[i].start_addr, 18755672ecfSMahesh Salgaonkar mc_recoverable_range[i].end_addr, 18855672ecfSMahesh Salgaonkar mc_recoverable_range[i].recover_addr); 18955672ecfSMahesh Salgaonkar } 19055672ecfSMahesh Salgaonkar return 1; 19155672ecfSMahesh Salgaonkar } 19255672ecfSMahesh Salgaonkar 193c4463b37SJeremy Kerr static int __init opal_register_exception_handlers(void) 194c4463b37SJeremy Kerr { 19529186097SBenjamin Herrenschmidt #ifdef __BIG_ENDIAN__ 196c4463b37SJeremy Kerr u64 glue; 197c4463b37SJeremy Kerr 198c4463b37SJeremy Kerr if (!(powerpc_firmware_features & FW_FEATURE_OPAL)) 199c4463b37SJeremy Kerr return -ENODEV; 200c4463b37SJeremy Kerr 20128446de2SMahesh Salgaonkar /* Hookup some exception handlers except machine check. We use the 20228446de2SMahesh Salgaonkar * fwnmi area at 0x7000 to provide the glue space to OPAL 203ed79ba9eSBenjamin Herrenschmidt */ 204ed79ba9eSBenjamin Herrenschmidt glue = 0x7000; 2056507955cSMahesh Salgaonkar 2066507955cSMahesh Salgaonkar /* 2076507955cSMahesh Salgaonkar * Check if we are running on newer firmware that exports 2086507955cSMahesh Salgaonkar * OPAL_HANDLE_HMI token. If yes, then don't ask OPAL to patch 2096507955cSMahesh Salgaonkar * the HMI interrupt and we catch it directly in Linux. 2106507955cSMahesh Salgaonkar * 2116507955cSMahesh Salgaonkar * For older firmware (i.e currently released POWER8 System Firmware 2126507955cSMahesh Salgaonkar * as of today <= SV810_087), we fallback to old behavior and let OPAL 2136507955cSMahesh Salgaonkar * patch the HMI vector and handle it inside OPAL firmware. 2146507955cSMahesh Salgaonkar * 2156507955cSMahesh Salgaonkar * For newer firmware (in development/yet to be released) we will 2166507955cSMahesh Salgaonkar * start catching/handling HMI directly in Linux. 2176507955cSMahesh Salgaonkar */ 2186507955cSMahesh Salgaonkar if (!opal_check_token(OPAL_HANDLE_HMI)) { 21908135139SMichael Ellerman pr_info("Old firmware detected, OPAL handles HMIs.\n"); 2206507955cSMahesh Salgaonkar opal_register_exception_handler( 2216507955cSMahesh Salgaonkar OPAL_HYPERVISOR_MAINTENANCE_HANDLER, 2226507955cSMahesh Salgaonkar 0, glue); 2236507955cSMahesh Salgaonkar glue += 128; 2246507955cSMahesh Salgaonkar } 2256507955cSMahesh Salgaonkar 226ed79ba9eSBenjamin Herrenschmidt opal_register_exception_handler(OPAL_SOFTPATCH_HANDLER, 0, glue); 22729186097SBenjamin Herrenschmidt #endif 228ed79ba9eSBenjamin Herrenschmidt 229c4463b37SJeremy Kerr return 0; 23014a43e69SBenjamin Herrenschmidt } 231b14726c5SMichael Ellerman machine_early_initcall(powernv, opal_register_exception_handlers); 232c4463b37SJeremy Kerr 23324366360SMahesh Salgaonkar /* 23424366360SMahesh Salgaonkar * Opal message notifier based on message type. Allow subscribers to get 23524366360SMahesh Salgaonkar * notified for specific messgae type. 23624366360SMahesh Salgaonkar */ 237d7cf83fcSMichael Ellerman int opal_message_notifier_register(enum opal_msg_type msg_type, 23824366360SMahesh Salgaonkar struct notifier_block *nb) 23924366360SMahesh Salgaonkar { 240792f96e9SNeelesh Gupta if (!nb || msg_type >= OPAL_MSG_TYPE_MAX) { 241f2c2cbccSJoe Perches pr_warn("%s: Invalid arguments, msg_type:%d\n", 24224366360SMahesh Salgaonkar __func__, msg_type); 24324366360SMahesh Salgaonkar return -EINVAL; 24424366360SMahesh Salgaonkar } 245792f96e9SNeelesh Gupta 24624366360SMahesh Salgaonkar return atomic_notifier_chain_register( 24724366360SMahesh Salgaonkar &opal_msg_notifier_head[msg_type], nb); 24824366360SMahesh Salgaonkar } 249594fcb9eSJeremy Kerr EXPORT_SYMBOL_GPL(opal_message_notifier_register); 25024366360SMahesh Salgaonkar 251df60f576SMichael Ellerman int opal_message_notifier_unregister(enum opal_msg_type msg_type, 252b921e902SNeelesh Gupta struct notifier_block *nb) 253b921e902SNeelesh Gupta { 254b921e902SNeelesh Gupta return atomic_notifier_chain_unregister( 255b921e902SNeelesh Gupta &opal_msg_notifier_head[msg_type], nb); 256b921e902SNeelesh Gupta } 257594fcb9eSJeremy Kerr EXPORT_SYMBOL_GPL(opal_message_notifier_unregister); 258b921e902SNeelesh Gupta 25924366360SMahesh Salgaonkar static void opal_message_do_notify(uint32_t msg_type, void *msg) 26024366360SMahesh Salgaonkar { 26124366360SMahesh Salgaonkar /* notify subscribers */ 26224366360SMahesh Salgaonkar atomic_notifier_call_chain(&opal_msg_notifier_head[msg_type], 26324366360SMahesh Salgaonkar msg_type, msg); 26424366360SMahesh Salgaonkar } 26524366360SMahesh Salgaonkar 26624366360SMahesh Salgaonkar static void opal_handle_message(void) 26724366360SMahesh Salgaonkar { 26824366360SMahesh Salgaonkar s64 ret; 26924366360SMahesh Salgaonkar /* 27024366360SMahesh Salgaonkar * TODO: pre-allocate a message buffer depending on opal-msg-size 27124366360SMahesh Salgaonkar * value in /proc/device-tree. 27224366360SMahesh Salgaonkar */ 27324366360SMahesh Salgaonkar static struct opal_msg msg; 274bb4398e1SAnton Blanchard u32 type; 27524366360SMahesh Salgaonkar 27624366360SMahesh Salgaonkar ret = opal_get_msg(__pa(&msg), sizeof(msg)); 27724366360SMahesh Salgaonkar /* No opal message pending. */ 27824366360SMahesh Salgaonkar if (ret == OPAL_RESOURCE) 27924366360SMahesh Salgaonkar return; 28024366360SMahesh Salgaonkar 28124366360SMahesh Salgaonkar /* check for errors. */ 28224366360SMahesh Salgaonkar if (ret) { 283f2c2cbccSJoe Perches pr_warn("%s: Failed to retrieve opal message, err=%lld\n", 28424366360SMahesh Salgaonkar __func__, ret); 28524366360SMahesh Salgaonkar return; 28624366360SMahesh Salgaonkar } 28724366360SMahesh Salgaonkar 288bb4398e1SAnton Blanchard type = be32_to_cpu(msg.msg_type); 289bb4398e1SAnton Blanchard 29024366360SMahesh Salgaonkar /* Sanity check */ 291792f96e9SNeelesh Gupta if (type >= OPAL_MSG_TYPE_MAX) { 29298da62b7SStewart Smith pr_warn_once("%s: Unknown message type: %u\n", __func__, type); 29324366360SMahesh Salgaonkar return; 29424366360SMahesh Salgaonkar } 295bb4398e1SAnton Blanchard opal_message_do_notify(type, (void *)&msg); 29624366360SMahesh Salgaonkar } 29724366360SMahesh Salgaonkar 298a295af24SAlistair Popple static irqreturn_t opal_message_notify(int irq, void *data) 29924366360SMahesh Salgaonkar { 30024366360SMahesh Salgaonkar opal_handle_message(); 301a295af24SAlistair Popple return IRQ_HANDLED; 30224366360SMahesh Salgaonkar } 30324366360SMahesh Salgaonkar 30424366360SMahesh Salgaonkar static int __init opal_message_init(void) 30524366360SMahesh Salgaonkar { 306a295af24SAlistair Popple int ret, i, irq; 30724366360SMahesh Salgaonkar 30824366360SMahesh Salgaonkar for (i = 0; i < OPAL_MSG_TYPE_MAX; i++) 30924366360SMahesh Salgaonkar ATOMIC_INIT_NOTIFIER_HEAD(&opal_msg_notifier_head[i]); 31024366360SMahesh Salgaonkar 311a295af24SAlistair Popple irq = opal_event_request(ilog2(OPAL_EVENT_MSG_PENDING)); 312a295af24SAlistair Popple if (!irq) { 313a295af24SAlistair Popple pr_err("%s: Can't register OPAL event irq (%d)\n", 314a295af24SAlistair Popple __func__, irq); 315a295af24SAlistair Popple return irq; 316a295af24SAlistair Popple } 317a295af24SAlistair Popple 318a295af24SAlistair Popple ret = request_irq(irq, opal_message_notify, 319a295af24SAlistair Popple IRQ_TYPE_LEVEL_HIGH, "opal-msg", NULL); 32024366360SMahesh Salgaonkar if (ret) { 321a295af24SAlistair Popple pr_err("%s: Can't request OPAL event irq (%d)\n", 32224366360SMahesh Salgaonkar __func__, ret); 32324366360SMahesh Salgaonkar return ret; 32424366360SMahesh Salgaonkar } 325a295af24SAlistair Popple 32624366360SMahesh Salgaonkar return 0; 32724366360SMahesh Salgaonkar } 32824366360SMahesh Salgaonkar 32914a43e69SBenjamin Herrenschmidt int opal_get_chars(uint32_t vtermno, char *buf, int count) 33014a43e69SBenjamin Herrenschmidt { 3314f89363bSBenjamin Herrenschmidt s64 rc; 3324f89363bSBenjamin Herrenschmidt __be64 evt, len; 33314a43e69SBenjamin Herrenschmidt 33414a43e69SBenjamin Herrenschmidt if (!opal.entry) 335daea1175SBenjamin Herrenschmidt return -ENODEV; 33614a43e69SBenjamin Herrenschmidt opal_poll_events(&evt); 3374f89363bSBenjamin Herrenschmidt if ((be64_to_cpu(evt) & OPAL_EVENT_CONSOLE_INPUT) == 0) 33814a43e69SBenjamin Herrenschmidt return 0; 3394f89363bSBenjamin Herrenschmidt len = cpu_to_be64(count); 34014a43e69SBenjamin Herrenschmidt rc = opal_console_read(vtermno, &len, buf); 34114a43e69SBenjamin Herrenschmidt if (rc == OPAL_SUCCESS) 3424f89363bSBenjamin Herrenschmidt return be64_to_cpu(len); 34314a43e69SBenjamin Herrenschmidt return 0; 34414a43e69SBenjamin Herrenschmidt } 34514a43e69SBenjamin Herrenschmidt 34617cc1dd4SNicholas Piggin static int __opal_put_chars(uint32_t vtermno, const char *data, int total_len, bool atomic) 34714a43e69SBenjamin Herrenschmidt { 34817cc1dd4SNicholas Piggin unsigned long flags = 0 /* shut up gcc */; 349b74d2807SNicholas Piggin int written; 350b74d2807SNicholas Piggin __be64 olen; 351b74d2807SNicholas Piggin s64 rc; 35214a43e69SBenjamin Herrenschmidt 35314a43e69SBenjamin Herrenschmidt if (!opal.entry) 354daea1175SBenjamin Herrenschmidt return -ENODEV; 35514a43e69SBenjamin Herrenschmidt 35617cc1dd4SNicholas Piggin if (atomic) 35714a43e69SBenjamin Herrenschmidt spin_lock_irqsave(&opal_write_lock, flags); 3584f89363bSBenjamin Herrenschmidt rc = opal_console_write_buffer_space(vtermno, &olen); 359b74d2807SNicholas Piggin if (rc || be64_to_cpu(olen) < total_len) { 36014a43e69SBenjamin Herrenschmidt /* Closed -> drop characters */ 36114a43e69SBenjamin Herrenschmidt if (rc) 362b74d2807SNicholas Piggin written = total_len; 363b74d2807SNicholas Piggin else 364b74d2807SNicholas Piggin written = -EAGAIN; 365b74d2807SNicholas Piggin goto out; 36614a43e69SBenjamin Herrenschmidt } 36714a43e69SBenjamin Herrenschmidt 368b74d2807SNicholas Piggin /* Should not get a partial write here because space is available. */ 3694f89363bSBenjamin Herrenschmidt olen = cpu_to_be64(total_len); 3704f89363bSBenjamin Herrenschmidt rc = opal_console_write(vtermno, &olen, data); 371b74d2807SNicholas Piggin if (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) { 37295b861a7SNicholas Piggin if (rc == OPAL_BUSY_EVENT) 37336d2dabcSNicholas Piggin opal_poll_events(NULL); 374b74d2807SNicholas Piggin written = -EAGAIN; 375b74d2807SNicholas Piggin goto out; 37636d2dabcSNicholas Piggin } 37736d2dabcSNicholas Piggin 3781de1455fSBenjamin Herrenschmidt /* Closed or other error drop */ 37936d2dabcSNicholas Piggin if (rc != OPAL_SUCCESS) { 380b74d2807SNicholas Piggin written = opal_error_code(rc); 381b74d2807SNicholas Piggin goto out; 3821de1455fSBenjamin Herrenschmidt } 38336d2dabcSNicholas Piggin 384b74d2807SNicholas Piggin written = be64_to_cpu(olen); 385b74d2807SNicholas Piggin if (written < total_len) { 38617cc1dd4SNicholas Piggin if (atomic) { 387b74d2807SNicholas Piggin /* Should not happen */ 38817cc1dd4SNicholas Piggin pr_warn("atomic console write returned partial " 38917cc1dd4SNicholas Piggin "len=%d written=%d\n", total_len, written); 39017cc1dd4SNicholas Piggin } 391b74d2807SNicholas Piggin if (!written) 392b74d2807SNicholas Piggin written = -EAGAIN; 393b74d2807SNicholas Piggin } 394b74d2807SNicholas Piggin 395b74d2807SNicholas Piggin out: 39617cc1dd4SNicholas Piggin if (atomic) 397b74d2807SNicholas Piggin spin_unlock_irqrestore(&opal_write_lock, flags); 39836d2dabcSNicholas Piggin 399d2a2262eSNicholas Piggin return written; 400d2a2262eSNicholas Piggin } 401d2a2262eSNicholas Piggin 40217cc1dd4SNicholas Piggin int opal_put_chars(uint32_t vtermno, const char *data, int total_len) 40317cc1dd4SNicholas Piggin { 40417cc1dd4SNicholas Piggin return __opal_put_chars(vtermno, data, total_len, false); 40517cc1dd4SNicholas Piggin } 40617cc1dd4SNicholas Piggin 40717cc1dd4SNicholas Piggin /* 40817cc1dd4SNicholas Piggin * opal_put_chars_atomic will not perform partial-writes. Data will be 40917cc1dd4SNicholas Piggin * atomically written to the terminal or not at all. This is not strictly 41017cc1dd4SNicholas Piggin * true at the moment because console space can race with OPAL's console 41117cc1dd4SNicholas Piggin * writes. 41217cc1dd4SNicholas Piggin */ 41317cc1dd4SNicholas Piggin int opal_put_chars_atomic(uint32_t vtermno, const char *data, int total_len) 41417cc1dd4SNicholas Piggin { 41517cc1dd4SNicholas Piggin return __opal_put_chars(vtermno, data, total_len, true); 41617cc1dd4SNicholas Piggin } 41717cc1dd4SNicholas Piggin 41895b861a7SNicholas Piggin static s64 __opal_flush_console(uint32_t vtermno) 419d2a2262eSNicholas Piggin { 420d2a2262eSNicholas Piggin s64 rc; 421d2a2262eSNicholas Piggin 422d2a2262eSNicholas Piggin if (!opal_check_token(OPAL_CONSOLE_FLUSH)) { 423d2a2262eSNicholas Piggin __be64 evt; 424d2a2262eSNicholas Piggin 425d2a2262eSNicholas Piggin /* 426d2a2262eSNicholas Piggin * If OPAL_CONSOLE_FLUSH is not implemented in the firmware, 427d2a2262eSNicholas Piggin * the console can still be flushed by calling the polling 428d2a2262eSNicholas Piggin * function while it has OPAL_EVENT_CONSOLE_OUTPUT events. 429d2a2262eSNicholas Piggin */ 43095b861a7SNicholas Piggin WARN_ONCE(1, "opal: OPAL_CONSOLE_FLUSH missing.\n"); 43195b861a7SNicholas Piggin 43214a43e69SBenjamin Herrenschmidt opal_poll_events(&evt); 43395b861a7SNicholas Piggin if (!(be64_to_cpu(evt) & OPAL_EVENT_CONSOLE_OUTPUT)) 434d2a2262eSNicholas Piggin return OPAL_SUCCESS; 43595b861a7SNicholas Piggin return OPAL_BUSY; 436d2a2262eSNicholas Piggin 43795b861a7SNicholas Piggin } else { 438d2a2262eSNicholas Piggin rc = opal_console_flush(vtermno); 439d2a2262eSNicholas Piggin if (rc == OPAL_BUSY_EVENT) { 440d2a2262eSNicholas Piggin opal_poll_events(NULL); 44195b861a7SNicholas Piggin rc = OPAL_BUSY; 442d2a2262eSNicholas Piggin } 44395b861a7SNicholas Piggin return rc; 444d2a2262eSNicholas Piggin } 44595b861a7SNicholas Piggin 44695b861a7SNicholas Piggin } 44795b861a7SNicholas Piggin 44895b861a7SNicholas Piggin /* 44995b861a7SNicholas Piggin * opal_flush_console spins until the console is flushed 45095b861a7SNicholas Piggin */ 45195b861a7SNicholas Piggin int opal_flush_console(uint32_t vtermno) 45295b861a7SNicholas Piggin { 45395b861a7SNicholas Piggin for (;;) { 45495b861a7SNicholas Piggin s64 rc = __opal_flush_console(vtermno); 45595b861a7SNicholas Piggin 45695b861a7SNicholas Piggin if (rc == OPAL_BUSY || rc == OPAL_PARTIAL) { 45795b861a7SNicholas Piggin mdelay(1); 45895b861a7SNicholas Piggin continue; 45995b861a7SNicholas Piggin } 460d2a2262eSNicholas Piggin 461d2a2262eSNicholas Piggin return opal_error_code(rc); 46214a43e69SBenjamin Herrenschmidt } 46395b861a7SNicholas Piggin } 46495b861a7SNicholas Piggin 46595b861a7SNicholas Piggin /* 46695b861a7SNicholas Piggin * opal_flush_chars is an hvc interface that sleeps until the console is 46795b861a7SNicholas Piggin * flushed if wait, otherwise it will return -EBUSY if the console has data, 46895b861a7SNicholas Piggin * -EAGAIN if it has data and some of it was flushed. 46995b861a7SNicholas Piggin */ 47095b861a7SNicholas Piggin int opal_flush_chars(uint32_t vtermno, bool wait) 47195b861a7SNicholas Piggin { 47295b861a7SNicholas Piggin for (;;) { 47395b861a7SNicholas Piggin s64 rc = __opal_flush_console(vtermno); 47495b861a7SNicholas Piggin 47595b861a7SNicholas Piggin if (rc == OPAL_BUSY || rc == OPAL_PARTIAL) { 47695b861a7SNicholas Piggin if (wait) { 47795b861a7SNicholas Piggin msleep(OPAL_BUSY_DELAY_MS); 47895b861a7SNicholas Piggin continue; 47995b861a7SNicholas Piggin } 48095b861a7SNicholas Piggin if (rc == OPAL_PARTIAL) 48195b861a7SNicholas Piggin return -EAGAIN; 48295b861a7SNicholas Piggin } 48395b861a7SNicholas Piggin 48495b861a7SNicholas Piggin return opal_error_code(rc); 48595b861a7SNicholas Piggin } 48695b861a7SNicholas Piggin } 48714a43e69SBenjamin Herrenschmidt 488b63a0ffeSMahesh Salgaonkar static int opal_recover_mce(struct pt_regs *regs, 489b63a0ffeSMahesh Salgaonkar struct machine_check_event *evt) 490b63a0ffeSMahesh Salgaonkar { 491b63a0ffeSMahesh Salgaonkar int recovered = 0; 492b63a0ffeSMahesh Salgaonkar 493b63a0ffeSMahesh Salgaonkar if (!(regs->msr & MSR_RI)) { 494b63a0ffeSMahesh Salgaonkar /* If MSR_RI isn't set, we cannot recover */ 495c74dd88eSMahesh Salgaonkar pr_err("Machine check interrupt unrecoverable: MSR(RI=0)\n"); 496b63a0ffeSMahesh Salgaonkar recovered = 0; 497b63a0ffeSMahesh Salgaonkar } else if (evt->disposition == MCE_DISPOSITION_RECOVERED) { 498b63a0ffeSMahesh Salgaonkar /* Platform corrected itself */ 499b63a0ffeSMahesh Salgaonkar recovered = 1; 5001363875bSNicholas Piggin } else if (evt->severity == MCE_SEV_FATAL) { 5011363875bSNicholas Piggin /* Fatal machine check */ 5021363875bSNicholas Piggin pr_err("Machine check interrupt is fatal\n"); 5031363875bSNicholas Piggin recovered = 0; 5046fcd6baaSNicholas Piggin } 5056fcd6baaSNicholas Piggin 5066fcd6baaSNicholas Piggin if (!recovered && evt->severity == MCE_SEV_ERROR_SYNC) { 507b63a0ffeSMahesh Salgaonkar /* 5086fcd6baaSNicholas Piggin * Try to kill processes if we get a synchronous machine check 5096fcd6baaSNicholas Piggin * (e.g., one caused by execution of this instruction). This 5106fcd6baaSNicholas Piggin * will devolve into a panic if we try to kill init or are in 5116fcd6baaSNicholas Piggin * an interrupt etc. 512b63a0ffeSMahesh Salgaonkar * 513b63a0ffeSMahesh Salgaonkar * TODO: Queue up this address for hwpoisioning later. 5146fcd6baaSNicholas Piggin * TODO: This is not quite right for d-side machine 5156fcd6baaSNicholas Piggin * checks ->nip is not necessarily the important 5166fcd6baaSNicholas Piggin * address. 517b63a0ffeSMahesh Salgaonkar */ 5186fcd6baaSNicholas Piggin if ((user_mode(regs))) { 519b63a0ffeSMahesh Salgaonkar _exception(SIGBUS, regs, BUS_MCEERR_AR, regs->nip); 520b63a0ffeSMahesh Salgaonkar recovered = 1; 5216fcd6baaSNicholas Piggin } else if (die_will_crash()) { 5226fcd6baaSNicholas Piggin /* 5236fcd6baaSNicholas Piggin * die() would kill the kernel, so better to go via 5246fcd6baaSNicholas Piggin * the platform reboot code that will log the 5256fcd6baaSNicholas Piggin * machine check. 5266fcd6baaSNicholas Piggin */ 5276fcd6baaSNicholas Piggin recovered = 0; 5286fcd6baaSNicholas Piggin } else { 5296fcd6baaSNicholas Piggin die("Machine check", regs, SIGBUS); 5306fcd6baaSNicholas Piggin recovered = 1; 531b63a0ffeSMahesh Salgaonkar } 5326fcd6baaSNicholas Piggin } 5336fcd6baaSNicholas Piggin 534b63a0ffeSMahesh Salgaonkar return recovered; 535b63a0ffeSMahesh Salgaonkar } 536b63a0ffeSMahesh Salgaonkar 53762dea077SBreno Leitao void __noreturn pnv_platform_error_reboot(struct pt_regs *regs, const char *msg) 538b746e3e0SNicholas Piggin { 53935adacd6SNicholas Piggin panic_flush_kmsg_start(); 54035adacd6SNicholas Piggin 541b746e3e0SNicholas Piggin pr_emerg("Hardware platform error: %s\n", msg); 542b746e3e0SNicholas Piggin if (regs) 543b746e3e0SNicholas Piggin show_regs(regs); 544b746e3e0SNicholas Piggin smp_send_stop(); 54535adacd6SNicholas Piggin 54635adacd6SNicholas Piggin panic_flush_kmsg_end(); 547b746e3e0SNicholas Piggin 548b746e3e0SNicholas Piggin /* 549b746e3e0SNicholas Piggin * Don't bother to shut things down because this will 550b746e3e0SNicholas Piggin * xstop the system. 551b746e3e0SNicholas Piggin */ 552b746e3e0SNicholas Piggin if (opal_cec_reboot2(OPAL_REBOOT_PLATFORM_ERROR, msg) 553b746e3e0SNicholas Piggin == OPAL_UNSUPPORTED) { 554b746e3e0SNicholas Piggin pr_emerg("Reboot type %d not supported for %s\n", 555b746e3e0SNicholas Piggin OPAL_REBOOT_PLATFORM_ERROR, msg); 556b746e3e0SNicholas Piggin } 557b746e3e0SNicholas Piggin 558b746e3e0SNicholas Piggin /* 559b746e3e0SNicholas Piggin * We reached here. There can be three possibilities: 560b746e3e0SNicholas Piggin * 1. We are running on a firmware level that do not support 561b746e3e0SNicholas Piggin * opal_cec_reboot2() 562b746e3e0SNicholas Piggin * 2. We are running on a firmware level that do not support 563b746e3e0SNicholas Piggin * OPAL_REBOOT_PLATFORM_ERROR reboot type. 564b746e3e0SNicholas Piggin * 3. We are running on FSP based system that does not need 565b746e3e0SNicholas Piggin * opal to trigger checkstop explicitly for error analysis. 566b746e3e0SNicholas Piggin * The FSP PRD component would have already got notified 567b746e3e0SNicholas Piggin * about this error through other channels. 5685ee573e8SBalbir Singh * 4. We are running on a newer skiboot that by default does 5695ee573e8SBalbir Singh * not cause a checkstop, drops us back to the kernel to 5705ee573e8SBalbir Singh * extract context and state at the time of the error. 571b746e3e0SNicholas Piggin */ 572b746e3e0SNicholas Piggin 5735ee573e8SBalbir Singh panic(msg); 574b746e3e0SNicholas Piggin } 575b746e3e0SNicholas Piggin 576ed79ba9eSBenjamin Herrenschmidt int opal_machine_check(struct pt_regs *regs) 577ed79ba9eSBenjamin Herrenschmidt { 57836df96f8SMahesh Salgaonkar struct machine_check_event evt; 579ed79ba9eSBenjamin Herrenschmidt 58036df96f8SMahesh Salgaonkar if (!get_mce_event(&evt, MCE_EVENT_RELEASE)) 58136df96f8SMahesh Salgaonkar return 0; 582ed79ba9eSBenjamin Herrenschmidt 583ed79ba9eSBenjamin Herrenschmidt /* Print things out */ 58436df96f8SMahesh Salgaonkar if (evt.version != MCE_V1) { 585ed79ba9eSBenjamin Herrenschmidt pr_err("Machine Check Exception, Unknown event version %d !\n", 586ed79ba9eSBenjamin Herrenschmidt evt.version); 587ed79ba9eSBenjamin Herrenschmidt return 0; 588ed79ba9eSBenjamin Herrenschmidt } 58963f44d65SMichael Ellerman machine_check_print_event_info(&evt, user_mode(regs)); 590ed79ba9eSBenjamin Herrenschmidt 591b63a0ffeSMahesh Salgaonkar if (opal_recover_mce(regs, &evt)) 592b63a0ffeSMahesh Salgaonkar return 1; 593e784b649SMahesh Salgaonkar 594b746e3e0SNicholas Piggin pnv_platform_error_reboot(regs, "Unrecoverable Machine Check exception"); 595ed79ba9eSBenjamin Herrenschmidt } 596ed79ba9eSBenjamin Herrenschmidt 5970869b6fdSMahesh Salgaonkar /* Early hmi handler called in real mode. */ 5980869b6fdSMahesh Salgaonkar int opal_hmi_exception_early(struct pt_regs *regs) 5990869b6fdSMahesh Salgaonkar { 6000ef95b41SMahesh Salgaonkar s64 rc; 6010ef95b41SMahesh Salgaonkar 6020ef95b41SMahesh Salgaonkar /* 6030ef95b41SMahesh Salgaonkar * call opal hmi handler. Pass paca address as token. 6040ef95b41SMahesh Salgaonkar * The return value OPAL_SUCCESS is an indication that there is 6050ef95b41SMahesh Salgaonkar * an HMI event generated waiting to pull by Linux. 6060ef95b41SMahesh Salgaonkar */ 6070ef95b41SMahesh Salgaonkar rc = opal_handle_hmi(); 6080ef95b41SMahesh Salgaonkar if (rc == OPAL_SUCCESS) { 6090ef95b41SMahesh Salgaonkar local_paca->hmi_event_available = 1; 6100ef95b41SMahesh Salgaonkar return 1; 6110ef95b41SMahesh Salgaonkar } 6120869b6fdSMahesh Salgaonkar return 0; 6130869b6fdSMahesh Salgaonkar } 6140869b6fdSMahesh Salgaonkar 6150869b6fdSMahesh Salgaonkar /* HMI exception handler called in virtual mode during check_irq_replay. */ 6160869b6fdSMahesh Salgaonkar int opal_handle_hmi_exception(struct pt_regs *regs) 6170869b6fdSMahesh Salgaonkar { 6180ef95b41SMahesh Salgaonkar /* 6190ef95b41SMahesh Salgaonkar * Check if HMI event is available. 62056c0b48bSNicholas Piggin * if Yes, then wake kopald to process them. 6210ef95b41SMahesh Salgaonkar */ 6220ef95b41SMahesh Salgaonkar if (!local_paca->hmi_event_available) 6230869b6fdSMahesh Salgaonkar return 0; 6240ef95b41SMahesh Salgaonkar 6250ef95b41SMahesh Salgaonkar local_paca->hmi_event_available = 0; 62656c0b48bSNicholas Piggin opal_wake_poller(); 6270ef95b41SMahesh Salgaonkar 6280ef95b41SMahesh Salgaonkar return 1; 6290869b6fdSMahesh Salgaonkar } 6300869b6fdSMahesh Salgaonkar 63155672ecfSMahesh Salgaonkar static uint64_t find_recovery_address(uint64_t nip) 63255672ecfSMahesh Salgaonkar { 63355672ecfSMahesh Salgaonkar int i; 63455672ecfSMahesh Salgaonkar 63555672ecfSMahesh Salgaonkar for (i = 0; i < mc_recoverable_range_len; i++) 63655672ecfSMahesh Salgaonkar if ((nip >= mc_recoverable_range[i].start_addr) && 63755672ecfSMahesh Salgaonkar (nip < mc_recoverable_range[i].end_addr)) 63855672ecfSMahesh Salgaonkar return mc_recoverable_range[i].recover_addr; 63955672ecfSMahesh Salgaonkar return 0; 64055672ecfSMahesh Salgaonkar } 64155672ecfSMahesh Salgaonkar 64255672ecfSMahesh Salgaonkar bool opal_mce_check_early_recovery(struct pt_regs *regs) 64355672ecfSMahesh Salgaonkar { 64455672ecfSMahesh Salgaonkar uint64_t recover_addr = 0; 64555672ecfSMahesh Salgaonkar 64655672ecfSMahesh Salgaonkar if (!opal.base || !opal.size) 64755672ecfSMahesh Salgaonkar goto out; 64855672ecfSMahesh Salgaonkar 64955672ecfSMahesh Salgaonkar if ((regs->nip >= opal.base) && 650dc3799bbSAndrew Donnellan (regs->nip < (opal.base + opal.size))) 65155672ecfSMahesh Salgaonkar recover_addr = find_recovery_address(regs->nip); 65255672ecfSMahesh Salgaonkar 65355672ecfSMahesh Salgaonkar /* 65455672ecfSMahesh Salgaonkar * Setup regs->nip to rfi into fixup address. 65555672ecfSMahesh Salgaonkar */ 65655672ecfSMahesh Salgaonkar if (recover_addr) 65755672ecfSMahesh Salgaonkar regs->nip = recover_addr; 65855672ecfSMahesh Salgaonkar 65955672ecfSMahesh Salgaonkar out: 66055672ecfSMahesh Salgaonkar return !!recover_addr; 66155672ecfSMahesh Salgaonkar } 66255672ecfSMahesh Salgaonkar 6636f68b5e2SVasant Hegde static int opal_sysfs_init(void) 6646f68b5e2SVasant Hegde { 6656f68b5e2SVasant Hegde opal_kobj = kobject_create_and_add("opal", firmware_kobj); 6666f68b5e2SVasant Hegde if (!opal_kobj) { 6676f68b5e2SVasant Hegde pr_warn("kobject_create_and_add opal failed\n"); 6686f68b5e2SVasant Hegde return -ENOMEM; 6696f68b5e2SVasant Hegde } 6706f68b5e2SVasant Hegde 6716f68b5e2SVasant Hegde return 0; 6726f68b5e2SVasant Hegde } 6736f68b5e2SVasant Hegde 674c8742f85SBenjamin Herrenschmidt static ssize_t symbol_map_read(struct file *fp, struct kobject *kobj, 675c8742f85SBenjamin Herrenschmidt struct bin_attribute *bin_attr, 676c8742f85SBenjamin Herrenschmidt char *buf, loff_t off, size_t count) 677c8742f85SBenjamin Herrenschmidt { 678c8742f85SBenjamin Herrenschmidt return memory_read_from_buffer(buf, count, &off, bin_attr->private, 679c8742f85SBenjamin Herrenschmidt bin_attr->size); 680c8742f85SBenjamin Herrenschmidt } 681c8742f85SBenjamin Herrenschmidt 682c8742f85SBenjamin Herrenschmidt static BIN_ATTR_RO(symbol_map, 0); 683c8742f85SBenjamin Herrenschmidt 684c8742f85SBenjamin Herrenschmidt static void opal_export_symmap(void) 685c8742f85SBenjamin Herrenschmidt { 686c8742f85SBenjamin Herrenschmidt const __be64 *syms; 687c8742f85SBenjamin Herrenschmidt unsigned int size; 688c8742f85SBenjamin Herrenschmidt struct device_node *fw; 689c8742f85SBenjamin Herrenschmidt int rc; 690c8742f85SBenjamin Herrenschmidt 691c8742f85SBenjamin Herrenschmidt fw = of_find_node_by_path("/ibm,opal/firmware"); 692c8742f85SBenjamin Herrenschmidt if (!fw) 693c8742f85SBenjamin Herrenschmidt return; 694c8742f85SBenjamin Herrenschmidt syms = of_get_property(fw, "symbol-map", &size); 695c8742f85SBenjamin Herrenschmidt if (!syms || size != 2 * sizeof(__be64)) 696c8742f85SBenjamin Herrenschmidt return; 697c8742f85SBenjamin Herrenschmidt 698c8742f85SBenjamin Herrenschmidt /* Setup attributes */ 699c8742f85SBenjamin Herrenschmidt bin_attr_symbol_map.private = __va(be64_to_cpu(syms[0])); 700c8742f85SBenjamin Herrenschmidt bin_attr_symbol_map.size = be64_to_cpu(syms[1]); 701c8742f85SBenjamin Herrenschmidt 702c8742f85SBenjamin Herrenschmidt rc = sysfs_create_bin_file(opal_kobj, &bin_attr_symbol_map); 703c8742f85SBenjamin Herrenschmidt if (rc) 704c8742f85SBenjamin Herrenschmidt pr_warn("Error %d creating OPAL symbols file\n", rc); 705c8742f85SBenjamin Herrenschmidt } 706c8742f85SBenjamin Herrenschmidt 70711fe909dSMatt Brown static ssize_t export_attr_read(struct file *fp, struct kobject *kobj, 70811fe909dSMatt Brown struct bin_attribute *bin_attr, char *buf, 70911fe909dSMatt Brown loff_t off, size_t count) 71011fe909dSMatt Brown { 71111fe909dSMatt Brown return memory_read_from_buffer(buf, count, &off, bin_attr->private, 71211fe909dSMatt Brown bin_attr->size); 71311fe909dSMatt Brown } 71411fe909dSMatt Brown 71511fe909dSMatt Brown /* 71611fe909dSMatt Brown * opal_export_attrs: creates a sysfs node for each property listed in 71711fe909dSMatt Brown * the device-tree under /ibm,opal/firmware/exports/ 71811fe909dSMatt Brown * All new sysfs nodes are created under /opal/exports/. 71911fe909dSMatt Brown * This allows for reserved memory regions (e.g. HDAT) to be read. 72011fe909dSMatt Brown * The new sysfs nodes are only readable by root. 72111fe909dSMatt Brown */ 72211fe909dSMatt Brown static void opal_export_attrs(void) 72311fe909dSMatt Brown { 72411fe909dSMatt Brown struct bin_attribute *attr; 72511fe909dSMatt Brown struct device_node *np; 72611fe909dSMatt Brown struct property *prop; 72711fe909dSMatt Brown struct kobject *kobj; 72811fe909dSMatt Brown u64 vals[2]; 72911fe909dSMatt Brown int rc; 73011fe909dSMatt Brown 73111fe909dSMatt Brown np = of_find_node_by_path("/ibm,opal/firmware/exports"); 73211fe909dSMatt Brown if (!np) 73311fe909dSMatt Brown return; 73411fe909dSMatt Brown 73511fe909dSMatt Brown /* Create new 'exports' directory - /sys/firmware/opal/exports */ 73611fe909dSMatt Brown kobj = kobject_create_and_add("exports", opal_kobj); 73711fe909dSMatt Brown if (!kobj) { 73811fe909dSMatt Brown pr_warn("kobject_create_and_add() of exports failed\n"); 73911fe909dSMatt Brown return; 74011fe909dSMatt Brown } 74111fe909dSMatt Brown 74211fe909dSMatt Brown for_each_property_of_node(np, prop) { 74311fe909dSMatt Brown if (!strcmp(prop->name, "name") || !strcmp(prop->name, "phandle")) 74411fe909dSMatt Brown continue; 74511fe909dSMatt Brown 74611fe909dSMatt Brown if (of_property_read_u64_array(np, prop->name, &vals[0], 2)) 74711fe909dSMatt Brown continue; 74811fe909dSMatt Brown 74983c49190SMichael Ellerman attr = kzalloc(sizeof(*attr), GFP_KERNEL); 75011fe909dSMatt Brown 75111fe909dSMatt Brown if (attr == NULL) { 75211fe909dSMatt Brown pr_warn("Failed kmalloc for bin_attribute!"); 75311fe909dSMatt Brown continue; 75411fe909dSMatt Brown } 75511fe909dSMatt Brown 75683c49190SMichael Ellerman sysfs_bin_attr_init(attr); 75711fe909dSMatt Brown attr->attr.name = kstrdup(prop->name, GFP_KERNEL); 75811fe909dSMatt Brown attr->attr.mode = 0400; 75911fe909dSMatt Brown attr->read = export_attr_read; 76011fe909dSMatt Brown attr->private = __va(vals[0]); 76111fe909dSMatt Brown attr->size = vals[1]; 76211fe909dSMatt Brown 76311fe909dSMatt Brown if (attr->attr.name == NULL) { 76411fe909dSMatt Brown pr_warn("Failed kstrdup for bin_attribute attr.name"); 76511fe909dSMatt Brown kfree(attr); 76611fe909dSMatt Brown continue; 76711fe909dSMatt Brown } 76811fe909dSMatt Brown 76911fe909dSMatt Brown rc = sysfs_create_bin_file(kobj, attr); 77011fe909dSMatt Brown if (rc) { 77111fe909dSMatt Brown pr_warn("Error %d creating OPAL sysfs exports/%s file\n", 77211fe909dSMatt Brown rc, prop->name); 77311fe909dSMatt Brown kfree(attr->attr.name); 77411fe909dSMatt Brown kfree(attr); 77511fe909dSMatt Brown } 77611fe909dSMatt Brown } 77711fe909dSMatt Brown 77811fe909dSMatt Brown of_node_put(np); 77911fe909dSMatt Brown } 78011fe909dSMatt Brown 781b09c2ec4SVasant Hegde static void __init opal_dump_region_init(void) 782b09c2ec4SVasant Hegde { 783b09c2ec4SVasant Hegde void *addr; 784b09c2ec4SVasant Hegde uint64_t size; 785b09c2ec4SVasant Hegde int rc; 786b09c2ec4SVasant Hegde 787b962f5a4SStewart Smith if (!opal_check_token(OPAL_REGISTER_DUMP_REGION)) 788b962f5a4SStewart Smith return; 789b962f5a4SStewart Smith 790b09c2ec4SVasant Hegde /* Register kernel log buffer */ 791b09c2ec4SVasant Hegde addr = log_buf_addr_get(); 7926501ab5eSPranith Kumar if (addr == NULL) 7936501ab5eSPranith Kumar return; 7946501ab5eSPranith Kumar 795b09c2ec4SVasant Hegde size = log_buf_len_get(); 7966501ab5eSPranith Kumar if (size == 0) 7976501ab5eSPranith Kumar return; 7986501ab5eSPranith Kumar 799b09c2ec4SVasant Hegde rc = opal_register_dump_region(OPAL_DUMP_REGION_LOG_BUF, 800b09c2ec4SVasant Hegde __pa(addr), size); 801b09c2ec4SVasant Hegde /* Don't warn if this is just an older OPAL that doesn't 802b09c2ec4SVasant Hegde * know about that call 803b09c2ec4SVasant Hegde */ 804b09c2ec4SVasant Hegde if (rc && rc != OPAL_UNSUPPORTED) 805b09c2ec4SVasant Hegde pr_warn("DUMP: Failed to register kernel log buffer. " 806b09c2ec4SVasant Hegde "rc = %d\n", rc); 807b09c2ec4SVasant Hegde } 808608b286dSJeremy Kerr 8099e4f51bdSJack Miller static void opal_pdev_init(const char *compatible) 810ed59190eSCyril Bur { 811ed59190eSCyril Bur struct device_node *np; 812ed59190eSCyril Bur 8139e4f51bdSJack Miller for_each_compatible_node(np, NULL, compatible) 81447083450SNeelesh Gupta of_platform_device_create(np, NULL, NULL); 81547083450SNeelesh Gupta } 81647083450SNeelesh Gupta 8178f95faaaSMadhavan Srinivasan static void __init opal_imc_init_dev(void) 8188f95faaaSMadhavan Srinivasan { 8198f95faaaSMadhavan Srinivasan struct device_node *np; 8208f95faaaSMadhavan Srinivasan 8218f95faaaSMadhavan Srinivasan np = of_find_compatible_node(NULL, NULL, IMC_DTB_COMPAT); 8228f95faaaSMadhavan Srinivasan if (np) 8238f95faaaSMadhavan Srinivasan of_platform_device_create(np, NULL, NULL); 8248f95faaaSMadhavan Srinivasan } 8258f95faaaSMadhavan Srinivasan 8263bf57561SBenjamin Herrenschmidt static int kopald(void *unused) 8273bf57561SBenjamin Herrenschmidt { 828a203658bSBenjamin Herrenschmidt unsigned long timeout = msecs_to_jiffies(opal_heartbeat) + 1; 8299f0fd049SAlistair Popple 8303bf57561SBenjamin Herrenschmidt set_freezable(); 8313bf57561SBenjamin Herrenschmidt do { 8323bf57561SBenjamin Herrenschmidt try_to_freeze(); 83356c0b48bSNicholas Piggin 83456c0b48bSNicholas Piggin opal_handle_events(); 83556c0b48bSNicholas Piggin 83656c0b48bSNicholas Piggin set_current_state(TASK_INTERRUPTIBLE); 83756c0b48bSNicholas Piggin if (opal_have_pending_events()) 83856c0b48bSNicholas Piggin __set_current_state(TASK_RUNNING); 83956c0b48bSNicholas Piggin else 84056c0b48bSNicholas Piggin schedule_timeout(timeout); 84156c0b48bSNicholas Piggin 8423bf57561SBenjamin Herrenschmidt } while (!kthread_should_stop()); 8433bf57561SBenjamin Herrenschmidt 8443bf57561SBenjamin Herrenschmidt return 0; 8453bf57561SBenjamin Herrenschmidt } 8463bf57561SBenjamin Herrenschmidt 847a203658bSBenjamin Herrenschmidt void opal_wake_poller(void) 848a203658bSBenjamin Herrenschmidt { 849a203658bSBenjamin Herrenschmidt if (kopald_tsk) 850a203658bSBenjamin Herrenschmidt wake_up_process(kopald_tsk); 851a203658bSBenjamin Herrenschmidt } 852a203658bSBenjamin Herrenschmidt 8533bf57561SBenjamin Herrenschmidt static void opal_init_heartbeat(void) 8543bf57561SBenjamin Herrenschmidt { 8553bf57561SBenjamin Herrenschmidt /* Old firwmware, we assume the HVC heartbeat is sufficient */ 8563bf57561SBenjamin Herrenschmidt if (of_property_read_u32(opal_node, "ibm,heartbeat-ms", 8573bf57561SBenjamin Herrenschmidt &opal_heartbeat) != 0) 8583bf57561SBenjamin Herrenschmidt opal_heartbeat = 0; 8593bf57561SBenjamin Herrenschmidt 8603bf57561SBenjamin Herrenschmidt if (opal_heartbeat) 861a203658bSBenjamin Herrenschmidt kopald_tsk = kthread_run(kopald, NULL, "kopald"); 8623bf57561SBenjamin Herrenschmidt } 8633bf57561SBenjamin Herrenschmidt 86414a43e69SBenjamin Herrenschmidt static int __init opal_init(void) 86514a43e69SBenjamin Herrenschmidt { 866c159b596SVasant Hegde struct device_node *np, *consoles, *leds; 867c1c3a526SGavin Shan int rc; 86814a43e69SBenjamin Herrenschmidt 86914a43e69SBenjamin Herrenschmidt opal_node = of_find_node_by_path("/ibm,opal"); 87014a43e69SBenjamin Herrenschmidt if (!opal_node) { 87108135139SMichael Ellerman pr_warn("Device node not found\n"); 87214a43e69SBenjamin Herrenschmidt return -ENODEV; 87314a43e69SBenjamin Herrenschmidt } 8742db29d28SBenjamin Herrenschmidt 8752db29d28SBenjamin Herrenschmidt /* Register OPAL consoles if any ports */ 87614a43e69SBenjamin Herrenschmidt consoles = of_find_node_by_path("/ibm,opal/consoles"); 8772db29d28SBenjamin Herrenschmidt if (consoles) { 87814a43e69SBenjamin Herrenschmidt for_each_child_of_node(consoles, np) { 8792c8e65b5SRob Herring if (!of_node_name_eq(np, "serial")) 88014a43e69SBenjamin Herrenschmidt continue; 88114a43e69SBenjamin Herrenschmidt of_platform_device_create(np, NULL, NULL); 88214a43e69SBenjamin Herrenschmidt } 88314a43e69SBenjamin Herrenschmidt of_node_put(consoles); 8842db29d28SBenjamin Herrenschmidt } 885a125e092SBenjamin Herrenschmidt 88696e023e7SAlistair Popple /* Initialise OPAL messaging system */ 88796e023e7SAlistair Popple opal_message_init(); 88896e023e7SAlistair Popple 88996e023e7SAlistair Popple /* Initialise OPAL asynchronous completion interface */ 89096e023e7SAlistair Popple opal_async_comp_init(); 89196e023e7SAlistair Popple 89296e023e7SAlistair Popple /* Initialise OPAL sensor interface */ 89396e023e7SAlistair Popple opal_sensor_init(); 89496e023e7SAlistair Popple 89596e023e7SAlistair Popple /* Initialise OPAL hypervisor maintainence interrupt handling */ 89696e023e7SAlistair Popple opal_hmi_handler_init(); 89796e023e7SAlistair Popple 89847083450SNeelesh Gupta /* Create i2c platform devices */ 8999e4f51bdSJack Miller opal_pdev_init("ibm,opal-i2c"); 90047083450SNeelesh Gupta 9013013e173SOliver O'Halloran /* Handle non-volatile memory devices */ 9023013e173SOliver O'Halloran opal_pdev_init("pmem-region"); 9033013e173SOliver O'Halloran 9043bf57561SBenjamin Herrenschmidt /* Setup a heatbeat thread if requested by OPAL */ 9053bf57561SBenjamin Herrenschmidt opal_init_heartbeat(); 9063bf57561SBenjamin Herrenschmidt 9078f95faaaSMadhavan Srinivasan /* Detect In-Memory Collection counters and create devices*/ 9088f95faaaSMadhavan Srinivasan opal_imc_init_dev(); 9098f95faaaSMadhavan Srinivasan 910c159b596SVasant Hegde /* Create leds platform devices */ 911c159b596SVasant Hegde leds = of_find_node_by_path("/ibm,opal/leds"); 912c159b596SVasant Hegde if (leds) { 913c159b596SVasant Hegde of_platform_device_create(leds, "opal_leds", NULL); 914c159b596SVasant Hegde of_node_put(leds); 915c159b596SVasant Hegde } 916c159b596SVasant Hegde 9179b4fffa1SAndrew Donnellan /* Initialise OPAL message log interface */ 9189b4fffa1SAndrew Donnellan opal_msglog_init(); 9199b4fffa1SAndrew Donnellan 9206f68b5e2SVasant Hegde /* Create "opal" kobject under /sys/firmware */ 9216f68b5e2SVasant Hegde rc = opal_sysfs_init(); 92250bd6153SVasant Hegde if (rc == 0) { 923c8742f85SBenjamin Herrenschmidt /* Export symbol map to userspace */ 924c8742f85SBenjamin Herrenschmidt opal_export_symmap(); 925b09c2ec4SVasant Hegde /* Setup dump region interface */ 926b09c2ec4SVasant Hegde opal_dump_region_init(); 927774fea1aSStewart Smith /* Setup error log interface */ 928774fea1aSStewart Smith rc = opal_elog_init(); 92950bd6153SVasant Hegde /* Setup code update interface */ 930ed59190eSCyril Bur opal_flash_update_init(); 931c7e64b9cSStewart Smith /* Setup platform dump extract interface */ 932c7e64b9cSStewart Smith opal_platform_dump_init(); 9334029cd66SNeelesh Gupta /* Setup system parameters interface */ 9344029cd66SNeelesh Gupta opal_sys_param_init(); 9359b4fffa1SAndrew Donnellan /* Setup message log sysfs interface. */ 9369b4fffa1SAndrew Donnellan opal_msglog_sysfs_init(); 93750bd6153SVasant Hegde } 9386f68b5e2SVasant Hegde 93911fe909dSMatt Brown /* Export all properties */ 94011fe909dSMatt Brown opal_export_attrs(); 94111fe909dSMatt Brown 9420d7cd855SJeremy Kerr /* Initialize platform devices: IPMI backend, PRD & flash interface */ 9439e4f51bdSJack Miller opal_pdev_init("ibm,opal-ipmi"); 9449e4f51bdSJack Miller opal_pdev_init("ibm,opal-flash"); 9459e4f51bdSJack Miller opal_pdev_init("ibm,opal-prd"); 946ed59190eSCyril Bur 94743a1dd9bSSuraj Jitindar Singh /* Initialise platform device: oppanel interface */ 9489e4f51bdSJack Miller opal_pdev_init("ibm,opal-oppanel"); 94943a1dd9bSSuraj Jitindar Singh 950affddff6SRussell Currey /* Initialise OPAL kmsg dumper for flushing console on panic */ 951affddff6SRussell Currey opal_kmsg_init(); 952affddff6SRussell Currey 953cb8b340dSShilpasri G Bhat /* Initialise OPAL powercap interface */ 954cb8b340dSShilpasri G Bhat opal_powercap_init(); 955cb8b340dSShilpasri G Bhat 9568e84b2d1SShilpasri G Bhat /* Initialise OPAL Power-Shifting-Ratio interface */ 9578e84b2d1SShilpasri G Bhat opal_psr_init(); 9588e84b2d1SShilpasri G Bhat 959bf957155SShilpasri G Bhat /* Initialise OPAL sensor groups */ 960bf957155SShilpasri G Bhat opal_sensor_groups_init(); 961bf957155SShilpasri G Bhat 96208fb726dSMahesh Salgaonkar /* Initialise OPAL Power control interface */ 96308fb726dSMahesh Salgaonkar opal_power_control_init(); 96408fb726dSMahesh Salgaonkar 96514a43e69SBenjamin Herrenschmidt return 0; 96614a43e69SBenjamin Herrenschmidt } 967b14726c5SMichael Ellerman machine_subsys_initcall(powernv, opal_init); 96873ed148aSBenjamin Herrenschmidt 96973ed148aSBenjamin Herrenschmidt void opal_shutdown(void) 97073ed148aSBenjamin Herrenschmidt { 971f7d98d18SVasant Hegde long rc = OPAL_BUSY; 97273ed148aSBenjamin Herrenschmidt 9739f0fd049SAlistair Popple opal_event_shutdown(); 974f7d98d18SVasant Hegde 975f7d98d18SVasant Hegde /* 976f7d98d18SVasant Hegde * Then sync with OPAL which ensure anything that can 977f7d98d18SVasant Hegde * potentially write to our memory has completed such 978f7d98d18SVasant Hegde * as an ongoing dump retrieval 979f7d98d18SVasant Hegde */ 980f7d98d18SVasant Hegde while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) { 981f7d98d18SVasant Hegde rc = opal_sync_host_reboot(); 982f7d98d18SVasant Hegde if (rc == OPAL_BUSY) 983f7d98d18SVasant Hegde opal_poll_events(NULL); 984f7d98d18SVasant Hegde else 985f7d98d18SVasant Hegde mdelay(10); 986f7d98d18SVasant Hegde } 987b09c2ec4SVasant Hegde 988b09c2ec4SVasant Hegde /* Unregister memory dump region */ 989b962f5a4SStewart Smith if (opal_check_token(OPAL_UNREGISTER_DUMP_REGION)) 990b09c2ec4SVasant Hegde opal_unregister_dump_region(OPAL_DUMP_REGION_LOG_BUF); 99173ed148aSBenjamin Herrenschmidt } 992e28b05e7SJoel Stanley 993e28b05e7SJoel Stanley /* Export this so that test modules can use it */ 994e28b05e7SJoel Stanley EXPORT_SYMBOL_GPL(opal_invalid_call); 995594fcb9eSJeremy Kerr EXPORT_SYMBOL_GPL(opal_xscom_read); 996594fcb9eSJeremy Kerr EXPORT_SYMBOL_GPL(opal_xscom_write); 997608b286dSJeremy Kerr EXPORT_SYMBOL_GPL(opal_ipmi_send); 998608b286dSJeremy Kerr EXPORT_SYMBOL_GPL(opal_ipmi_recv); 999ed59190eSCyril Bur EXPORT_SYMBOL_GPL(opal_flash_read); 1000ed59190eSCyril Bur EXPORT_SYMBOL_GPL(opal_flash_write); 1001ed59190eSCyril Bur EXPORT_SYMBOL_GPL(opal_flash_erase); 10020d7cd855SJeremy Kerr EXPORT_SYMBOL_GPL(opal_prd_msg); 10036e708000SHaren Myneni EXPORT_SYMBOL_GPL(opal_check_token); 10043441f04bSAnton Blanchard 10053441f04bSAnton Blanchard /* Convert a region of vmalloc memory to an opal sg list */ 10063441f04bSAnton Blanchard struct opal_sg_list *opal_vmalloc_to_sg_list(void *vmalloc_addr, 10073441f04bSAnton Blanchard unsigned long vmalloc_size) 10083441f04bSAnton Blanchard { 10093441f04bSAnton Blanchard struct opal_sg_list *sg, *first = NULL; 10103441f04bSAnton Blanchard unsigned long i = 0; 10113441f04bSAnton Blanchard 10123441f04bSAnton Blanchard sg = kzalloc(PAGE_SIZE, GFP_KERNEL); 10133441f04bSAnton Blanchard if (!sg) 10143441f04bSAnton Blanchard goto nomem; 10153441f04bSAnton Blanchard 10163441f04bSAnton Blanchard first = sg; 10173441f04bSAnton Blanchard 10183441f04bSAnton Blanchard while (vmalloc_size > 0) { 10193441f04bSAnton Blanchard uint64_t data = vmalloc_to_pfn(vmalloc_addr) << PAGE_SHIFT; 10203441f04bSAnton Blanchard uint64_t length = min(vmalloc_size, PAGE_SIZE); 10213441f04bSAnton Blanchard 10223441f04bSAnton Blanchard sg->entry[i].data = cpu_to_be64(data); 10233441f04bSAnton Blanchard sg->entry[i].length = cpu_to_be64(length); 10243441f04bSAnton Blanchard i++; 10253441f04bSAnton Blanchard 10263441f04bSAnton Blanchard if (i >= SG_ENTRIES_PER_NODE) { 10273441f04bSAnton Blanchard struct opal_sg_list *next; 10283441f04bSAnton Blanchard 10293441f04bSAnton Blanchard next = kzalloc(PAGE_SIZE, GFP_KERNEL); 10303441f04bSAnton Blanchard if (!next) 10313441f04bSAnton Blanchard goto nomem; 10323441f04bSAnton Blanchard 10333441f04bSAnton Blanchard sg->length = cpu_to_be64( 10343441f04bSAnton Blanchard i * sizeof(struct opal_sg_entry) + 16); 10353441f04bSAnton Blanchard i = 0; 10363441f04bSAnton Blanchard sg->next = cpu_to_be64(__pa(next)); 10373441f04bSAnton Blanchard sg = next; 10383441f04bSAnton Blanchard } 10393441f04bSAnton Blanchard 10403441f04bSAnton Blanchard vmalloc_addr += length; 10413441f04bSAnton Blanchard vmalloc_size -= length; 10423441f04bSAnton Blanchard } 10433441f04bSAnton Blanchard 10443441f04bSAnton Blanchard sg->length = cpu_to_be64(i * sizeof(struct opal_sg_entry) + 16); 10453441f04bSAnton Blanchard 10463441f04bSAnton Blanchard return first; 10473441f04bSAnton Blanchard 10483441f04bSAnton Blanchard nomem: 10493441f04bSAnton Blanchard pr_err("%s : Failed to allocate memory\n", __func__); 10503441f04bSAnton Blanchard opal_free_sg_list(first); 10513441f04bSAnton Blanchard return NULL; 10523441f04bSAnton Blanchard } 10533441f04bSAnton Blanchard 10543441f04bSAnton Blanchard void opal_free_sg_list(struct opal_sg_list *sg) 10553441f04bSAnton Blanchard { 10563441f04bSAnton Blanchard while (sg) { 10573441f04bSAnton Blanchard uint64_t next = be64_to_cpu(sg->next); 10583441f04bSAnton Blanchard 10593441f04bSAnton Blanchard kfree(sg); 10603441f04bSAnton Blanchard 10613441f04bSAnton Blanchard if (next) 10623441f04bSAnton Blanchard sg = __va(next); 10633441f04bSAnton Blanchard else 10643441f04bSAnton Blanchard sg = NULL; 10653441f04bSAnton Blanchard } 10663441f04bSAnton Blanchard } 106716b1d26eSNeelesh Gupta 1068e3c5c2e0SCédric Le Goater int opal_error_code(int rc) 1069e3c5c2e0SCédric Le Goater { 1070e3c5c2e0SCédric Le Goater switch (rc) { 1071e3c5c2e0SCédric Le Goater case OPAL_SUCCESS: return 0; 1072e3c5c2e0SCédric Le Goater 1073e3c5c2e0SCédric Le Goater case OPAL_PARAMETER: return -EINVAL; 1074e3c5c2e0SCédric Le Goater case OPAL_ASYNC_COMPLETION: return -EINPROGRESS; 107577adbd22SCyril Bur case OPAL_BUSY: 1076e3c5c2e0SCédric Le Goater case OPAL_BUSY_EVENT: return -EBUSY; 1077e3c5c2e0SCédric Le Goater case OPAL_NO_MEM: return -ENOMEM; 107814aae78fSCédric Le Goater case OPAL_PERMISSION: return -EPERM; 1079e3c5c2e0SCédric Le Goater 1080e3c5c2e0SCédric Le Goater case OPAL_UNSUPPORTED: return -EIO; 1081e3c5c2e0SCédric Le Goater case OPAL_HARDWARE: return -EIO; 1082e3c5c2e0SCédric Le Goater case OPAL_INTERNAL_ERROR: return -EIO; 1083cb8b340dSShilpasri G Bhat case OPAL_TIMEOUT: return -ETIMEDOUT; 1084e3c5c2e0SCédric Le Goater default: 1085e3c5c2e0SCédric Le Goater pr_err("%s: unexpected OPAL error %d\n", __func__, rc); 1086e3c5c2e0SCédric Le Goater return -EIO; 1087e3c5c2e0SCédric Le Goater } 1088e3c5c2e0SCédric Le Goater } 1089e3c5c2e0SCédric Le Goater 10901d0761d2SAlistair Popple void powernv_set_nmmu_ptcr(unsigned long ptcr) 10911d0761d2SAlistair Popple { 10921d0761d2SAlistair Popple int rc; 10931d0761d2SAlistair Popple 10941d0761d2SAlistair Popple if (firmware_has_feature(FW_FEATURE_OPAL)) { 10951d0761d2SAlistair Popple rc = opal_nmmu_set_ptcr(-1UL, ptcr); 10961d0761d2SAlistair Popple if (rc != OPAL_SUCCESS && rc != OPAL_UNSUPPORTED) 10971d0761d2SAlistair Popple pr_warn("%s: Unable to set nest mmu ptcr\n", __func__); 10981d0761d2SAlistair Popple } 10991d0761d2SAlistair Popple } 11001d0761d2SAlistair Popple 110116b1d26eSNeelesh Gupta EXPORT_SYMBOL_GPL(opal_poll_events); 110216b1d26eSNeelesh Gupta EXPORT_SYMBOL_GPL(opal_rtc_read); 110316b1d26eSNeelesh Gupta EXPORT_SYMBOL_GPL(opal_rtc_write); 110416b1d26eSNeelesh Gupta EXPORT_SYMBOL_GPL(opal_tpo_read); 110516b1d26eSNeelesh Gupta EXPORT_SYMBOL_GPL(opal_tpo_write); 110647083450SNeelesh Gupta EXPORT_SYMBOL_GPL(opal_i2c_request); 1107c159b596SVasant Hegde /* Export these symbols for PowerNV LED class driver */ 1108c159b596SVasant Hegde EXPORT_SYMBOL_GPL(opal_leds_get_ind); 1109c159b596SVasant Hegde EXPORT_SYMBOL_GPL(opal_leds_set_ind); 111043a1dd9bSSuraj Jitindar Singh /* Export this symbol for PowerNV Operator Panel class driver */ 111143a1dd9bSSuraj Jitindar Singh EXPORT_SYMBOL_GPL(opal_write_oppanel_async); 1112ffe6d810SPaul Mackerras /* Export this for KVM */ 1113ffe6d810SPaul Mackerras EXPORT_SYMBOL_GPL(opal_int_set_mfrr); 11145af50993SBenjamin Herrenschmidt EXPORT_SYMBOL_GPL(opal_int_eoi); 111577adbd22SCyril Bur EXPORT_SYMBOL_GPL(opal_error_code); 1116656ecc16SHaren Myneni /* Export the below symbol for NX compression */ 1117656ecc16SHaren Myneni EXPORT_SYMBOL(opal_nx_coproc_init); 1118