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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 136 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190530000436.384967451@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
279 lines
7.1 KiB
C
279 lines
7.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* interfaces to Chassis Codes via PDC (firmware)
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*
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* Copyright (C) 2002 Laurent Canet <canetl@esiee.fr>
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* Copyright (C) 2002-2006 Thibaut VARENE <varenet@parisc-linux.org>
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*
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* TODO: poll chassis warns, trigger (configurable) machine shutdown when
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* needed.
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* Find out how to get Chassis warnings out of PAT boxes?
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*/
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#undef PDC_CHASSIS_DEBUG
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#ifdef PDC_CHASSIS_DEBUG
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#define DPRINTK(fmt, args...) printk(fmt, ## args)
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#else
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#define DPRINTK(fmt, args...)
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#endif
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/reboot.h>
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#include <linux/notifier.h>
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#include <linux/cache.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <asm/pdc_chassis.h>
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#include <asm/processor.h>
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#include <asm/pdc.h>
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#include <asm/pdcpat.h>
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#define PDC_CHASSIS_VER "0.05"
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#ifdef CONFIG_PDC_CHASSIS
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static unsigned int pdc_chassis_enabled __read_mostly = 1;
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/**
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* pdc_chassis_setup() - Enable/disable pdc_chassis code at boot time.
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* @str configuration param: 0 to disable chassis log
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* @return 1
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*/
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static int __init pdc_chassis_setup(char *str)
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{
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/*panic_timeout = simple_strtoul(str, NULL, 0);*/
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get_option(&str, &pdc_chassis_enabled);
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return 1;
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}
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__setup("pdcchassis=", pdc_chassis_setup);
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/**
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* pdc_chassis_checkold() - Checks for old PDC_CHASSIS compatibility
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* @pdc_chassis_old: 1 if old pdc chassis style
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*
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* Currently, only E class and A180 are known to work with this.
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* Inspired by Christoph Plattner
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*/
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#if 0
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static void __init pdc_chassis_checkold(void)
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{
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switch(CPU_HVERSION) {
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case 0x480: /* E25 */
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case 0x481: /* E35 */
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case 0x482: /* E45 */
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case 0x483: /* E55 */
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case 0x516: /* A180 */
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break;
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default:
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break;
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}
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DPRINTK(KERN_DEBUG "%s: pdc_chassis_checkold(); pdc_chassis_old = %d\n", __FILE__, pdc_chassis_old);
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}
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#endif
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/**
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* pdc_chassis_panic_event() - Called by the panic handler.
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*
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* As soon as a panic occurs, we should inform the PDC.
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*/
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static int pdc_chassis_panic_event(struct notifier_block *this,
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unsigned long event, void *ptr)
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{
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pdc_chassis_send_status(PDC_CHASSIS_DIRECT_PANIC);
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return NOTIFY_DONE;
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}
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static struct notifier_block pdc_chassis_panic_block = {
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.notifier_call = pdc_chassis_panic_event,
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.priority = INT_MAX,
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};
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/**
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* parisc_reboot_event() - Called by the reboot handler.
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*
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* As soon as a reboot occurs, we should inform the PDC.
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*/
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static int pdc_chassis_reboot_event(struct notifier_block *this,
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unsigned long event, void *ptr)
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{
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pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN);
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return NOTIFY_DONE;
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}
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static struct notifier_block pdc_chassis_reboot_block = {
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.notifier_call = pdc_chassis_reboot_event,
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.priority = INT_MAX,
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};
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#endif /* CONFIG_PDC_CHASSIS */
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/**
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* parisc_pdc_chassis_init() - Called at boot time.
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*/
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void __init parisc_pdc_chassis_init(void)
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{
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#ifdef CONFIG_PDC_CHASSIS
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if (likely(pdc_chassis_enabled)) {
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DPRINTK(KERN_DEBUG "%s: parisc_pdc_chassis_init()\n", __FILE__);
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/* Let see if we have something to handle... */
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printk(KERN_INFO "Enabling %s chassis codes support v%s\n",
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is_pdc_pat() ? "PDC_PAT" : "regular",
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PDC_CHASSIS_VER);
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/* initialize panic notifier chain */
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atomic_notifier_chain_register(&panic_notifier_list,
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&pdc_chassis_panic_block);
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/* initialize reboot notifier chain */
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register_reboot_notifier(&pdc_chassis_reboot_block);
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}
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#endif /* CONFIG_PDC_CHASSIS */
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}
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/**
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* pdc_chassis_send_status() - Sends a predefined message to the chassis,
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* and changes the front panel LEDs according to the new system state
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* @retval: PDC call return value.
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*
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* Only machines with 64 bits PDC PAT and those reported in
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* pdc_chassis_checkold() are supported atm.
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*
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* returns 0 if no error, -1 if no supported PDC is present or invalid message,
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* else returns the appropriate PDC error code.
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*
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* For a list of predefined messages, see asm-parisc/pdc_chassis.h
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*/
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int pdc_chassis_send_status(int message)
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{
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/* Maybe we should do that in an other way ? */
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int retval = 0;
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#ifdef CONFIG_PDC_CHASSIS
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if (likely(pdc_chassis_enabled)) {
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DPRINTK(KERN_DEBUG "%s: pdc_chassis_send_status(%d)\n", __FILE__, message);
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#ifdef CONFIG_64BIT
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if (is_pdc_pat()) {
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switch(message) {
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case PDC_CHASSIS_DIRECT_BSTART:
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BSTART, PDC_CHASSIS_LSTATE_RUN_NORMAL);
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break;
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case PDC_CHASSIS_DIRECT_BCOMPLETE:
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BCOMPLETE, PDC_CHASSIS_LSTATE_RUN_NORMAL);
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break;
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case PDC_CHASSIS_DIRECT_SHUTDOWN:
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_SHUTDOWN, PDC_CHASSIS_LSTATE_NONOS);
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break;
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case PDC_CHASSIS_DIRECT_PANIC:
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_PANIC, PDC_CHASSIS_LSTATE_RUN_CRASHREC);
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break;
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case PDC_CHASSIS_DIRECT_LPMC:
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_LPMC, PDC_CHASSIS_LSTATE_RUN_SYSINT);
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break;
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case PDC_CHASSIS_DIRECT_HPMC:
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_HPMC, PDC_CHASSIS_LSTATE_RUN_NCRIT);
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break;
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default:
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retval = -1;
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}
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} else retval = -1;
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#else
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if (1) {
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switch (message) {
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case PDC_CHASSIS_DIRECT_BSTART:
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retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_INIT));
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break;
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case PDC_CHASSIS_DIRECT_BCOMPLETE:
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retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_RUN));
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break;
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case PDC_CHASSIS_DIRECT_SHUTDOWN:
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retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_SHUT));
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break;
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case PDC_CHASSIS_DIRECT_HPMC:
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case PDC_CHASSIS_DIRECT_PANIC:
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retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_FLT));
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break;
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case PDC_CHASSIS_DIRECT_LPMC:
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retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_WARN));
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break;
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default:
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retval = -1;
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}
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} else retval = -1;
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#endif /* CONFIG_64BIT */
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} /* if (pdc_chassis_enabled) */
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#endif /* CONFIG_PDC_CHASSIS */
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return retval;
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}
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#ifdef CONFIG_PDC_CHASSIS_WARN
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#ifdef CONFIG_PROC_FS
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static int pdc_chassis_warn_show(struct seq_file *m, void *v)
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{
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unsigned long warn;
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u32 warnreg;
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if (pdc_chassis_warn(&warn) != PDC_OK)
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return -EIO;
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warnreg = (warn & 0xFFFFFFFF);
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if ((warnreg >> 24) & 0xFF)
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seq_printf(m, "Chassis component failure! (eg fan or PSU): 0x%.2x\n",
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(warnreg >> 24) & 0xFF);
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seq_printf(m, "Battery: %s\n", (warnreg & 0x04) ? "Low!" : "OK");
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seq_printf(m, "Temp low: %s\n", (warnreg & 0x02) ? "Exceeded!" : "OK");
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seq_printf(m, "Temp mid: %s\n", (warnreg & 0x01) ? "Exceeded!" : "OK");
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return 0;
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}
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static int __init pdc_chassis_create_procfs(void)
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{
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unsigned long test;
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int ret;
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ret = pdc_chassis_warn(&test);
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if ((ret == PDC_BAD_PROC) || (ret == PDC_BAD_OPTION)) {
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/* seems that some boxes (eg L1000) do not implement this */
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printk(KERN_INFO "Chassis warnings not supported.\n");
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return 0;
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}
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printk(KERN_INFO "Enabling PDC chassis warnings support v%s\n",
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PDC_CHASSIS_VER);
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proc_create_single("chassis", 0400, NULL, pdc_chassis_warn_show);
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return 0;
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}
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__initcall(pdc_chassis_create_procfs);
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#endif /* CONFIG_PROC_FS */
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#endif /* CONFIG_PDC_CHASSIS_WARN */
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