diff options
Diffstat (limited to 'drivers/char/snsc_event.c')
| -rw-r--r-- | drivers/char/snsc_event.c | 303 |
1 files changed, 0 insertions, 303 deletions
diff --git a/drivers/char/snsc_event.c b/drivers/char/snsc_event.c deleted file mode 100644 index e452673dff66..000000000000 --- a/drivers/char/snsc_event.c +++ /dev/null @@ -1,303 +0,0 @@ -/* - * SN Platform system controller communication support - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2004-2006 Silicon Graphics, Inc. All rights reserved. - */ - -/* - * System controller event handler - * - * These routines deal with environmental events arriving from the - * system controllers. - */ - -#include <linux/interrupt.h> -#include <linux/sched/signal.h> -#include <linux/slab.h> -#include <asm/byteorder.h> -#include <asm/sn/sn_sal.h> -#include <asm/unaligned.h> -#include "snsc.h" - -static struct subch_data_s *event_sd; - -void scdrv_event(unsigned long); -DECLARE_TASKLET(sn_sysctl_event, scdrv_event, 0); - -/* - * scdrv_event_interrupt - * - * Pull incoming environmental events off the physical link to the - * system controller and put them in a temporary holding area in SAL. - * Schedule scdrv_event() to move them along to their ultimate - * destination. - */ -static irqreturn_t -scdrv_event_interrupt(int irq, void *subch_data) -{ - struct subch_data_s *sd = subch_data; - unsigned long flags; - int status; - - spin_lock_irqsave(&sd->sd_rlock, flags); - status = ia64_sn_irtr_intr(sd->sd_nasid, sd->sd_subch); - - if ((status > 0) && (status & SAL_IROUTER_INTR_RECV)) { - tasklet_schedule(&sn_sysctl_event); - } - spin_unlock_irqrestore(&sd->sd_rlock, flags); - return IRQ_HANDLED; -} - - -/* - * scdrv_parse_event - * - * Break an event (as read from SAL) into useful pieces so we can decide - * what to do with it. - */ -static int -scdrv_parse_event(char *event, int *src, int *code, int *esp_code, char *desc) -{ - char *desc_end; - - /* record event source address */ - *src = get_unaligned_be32(event); - event += 4; /* move on to event code */ - - /* record the system controller's event code */ - *code = get_unaligned_be32(event); - event += 4; /* move on to event arguments */ - - /* how many arguments are in the packet? */ - if (*event++ != 2) { - /* if not 2, give up */ - return -1; - } - - /* parse out the ESP code */ - if (*event++ != IR_ARG_INT) { - /* not an integer argument, so give up */ - return -1; - } - *esp_code = get_unaligned_be32(event); - event += 4; - - /* parse out the event description */ - if (*event++ != IR_ARG_ASCII) { - /* not an ASCII string, so give up */ - return -1; - } - event[CHUNKSIZE-1] = '\0'; /* ensure this string ends! */ - event += 2; /* skip leading CR/LF */ - desc_end = desc + sprintf(desc, "%s", event); - - /* strip trailing CR/LF (if any) */ - for (desc_end--; - (desc_end != desc) && ((*desc_end == 0xd) || (*desc_end == 0xa)); - desc_end--) { - *desc_end = '\0'; - } - - return 0; -} - - -/* - * scdrv_event_severity - * - * Figure out how urgent a message we should write to the console/syslog - * via printk. - */ -static char * -scdrv_event_severity(int code) -{ - int ev_class = (code & EV_CLASS_MASK); - int ev_severity = (code & EV_SEVERITY_MASK); - char *pk_severity = KERN_NOTICE; - - switch (ev_class) { - case EV_CLASS_POWER: - switch (ev_severity) { - case EV_SEVERITY_POWER_LOW_WARNING: - case EV_SEVERITY_POWER_HIGH_WARNING: - pk_severity = KERN_WARNING; - break; - case EV_SEVERITY_POWER_HIGH_FAULT: - case EV_SEVERITY_POWER_LOW_FAULT: - pk_severity = KERN_ALERT; - break; - } - break; - case EV_CLASS_FAN: - switch (ev_severity) { - case EV_SEVERITY_FAN_WARNING: - pk_severity = KERN_WARNING; - break; - case EV_SEVERITY_FAN_FAULT: - pk_severity = KERN_CRIT; - break; - } - break; - case EV_CLASS_TEMP: - switch (ev_severity) { - case EV_SEVERITY_TEMP_ADVISORY: - pk_severity = KERN_WARNING; - break; - case EV_SEVERITY_TEMP_CRITICAL: - pk_severity = KERN_CRIT; - break; - case EV_SEVERITY_TEMP_FAULT: - pk_severity = KERN_ALERT; - break; - } - break; - case EV_CLASS_ENV: - pk_severity = KERN_ALERT; - break; - case EV_CLASS_TEST_FAULT: - pk_severity = KERN_ALERT; - break; - case EV_CLASS_TEST_WARNING: - pk_severity = KERN_WARNING; - break; - case EV_CLASS_PWRD_NOTIFY: - pk_severity = KERN_ALERT; - break; - } - - return pk_severity; -} - - -/* - * scdrv_dispatch_event - * - * Do the right thing with an incoming event. That's often nothing - * more than printing it to the system log. For power-down notifications - * we start a graceful shutdown. - */ -static void -scdrv_dispatch_event(char *event, int len) -{ - static int snsc_shutting_down = 0; - int code, esp_code, src, class; - char desc[CHUNKSIZE]; - char *severity; - - if (scdrv_parse_event(event, &src, &code, &esp_code, desc) < 0) { - /* ignore uninterpretible event */ - return; - } - - /* how urgent is the message? */ - severity = scdrv_event_severity(code); - - class = (code & EV_CLASS_MASK); - - if (class == EV_CLASS_PWRD_NOTIFY || code == ENV_PWRDN_PEND) { - if (snsc_shutting_down) - return; - - snsc_shutting_down = 1; - - /* give a message for each type of event */ - if (class == EV_CLASS_PWRD_NOTIFY) - printk(KERN_NOTICE "Power off indication received." - " Sending SIGPWR to init...\n"); - else if (code == ENV_PWRDN_PEND) - printk(KERN_CRIT "WARNING: Shutting down the system" - " due to a critical environmental condition." - " Sending SIGPWR to init...\n"); - - /* give a SIGPWR signal to init proc */ - kill_cad_pid(SIGPWR, 0); - } else { - /* print to system log */ - printk("%s|$(0x%x)%s\n", severity, esp_code, desc); - } -} - - -/* - * scdrv_event - * - * Called as a tasklet when an event arrives from the L1. Read the event - * from where it's temporarily stored in SAL and call scdrv_dispatch_event() - * to send it on its way. Keep trying to read events until SAL indicates - * that there are no more immediately available. - */ -void -scdrv_event(unsigned long dummy) -{ - int status; - int len; - unsigned long flags; - struct subch_data_s *sd = event_sd; - - /* anything to read? */ - len = CHUNKSIZE; - spin_lock_irqsave(&sd->sd_rlock, flags); - status = ia64_sn_irtr_recv(sd->sd_nasid, sd->sd_subch, - sd->sd_rb, &len); - - while (!(status < 0)) { - spin_unlock_irqrestore(&sd->sd_rlock, flags); - scdrv_dispatch_event(sd->sd_rb, len); - len = CHUNKSIZE; - spin_lock_irqsave(&sd->sd_rlock, flags); - status = ia64_sn_irtr_recv(sd->sd_nasid, sd->sd_subch, - sd->sd_rb, &len); - } - spin_unlock_irqrestore(&sd->sd_rlock, flags); -} - - -/* - * scdrv_event_init - * - * Sets up a system controller subchannel to begin receiving event - * messages. This is sort of a specialized version of scdrv_open() - * in drivers/char/sn_sysctl.c. - */ -void -scdrv_event_init(struct sysctl_data_s *scd) -{ - int rv; - - event_sd = kzalloc(sizeof (struct subch_data_s), GFP_KERNEL); - if (event_sd == NULL) { - printk(KERN_WARNING "%s: couldn't allocate subchannel info" - " for event monitoring\n", __func__); - return; - } - - /* initialize subch_data_s fields */ - event_sd->sd_nasid = scd->scd_nasid; - spin_lock_init(&event_sd->sd_rlock); - - /* ask the system controllers to send events to this node */ - event_sd->sd_subch = ia64_sn_sysctl_event_init(scd->scd_nasid); - - if (event_sd->sd_subch < 0) { - kfree(event_sd); - printk(KERN_WARNING "%s: couldn't open event subchannel\n", - __func__); - return; - } - - /* hook event subchannel up to the system controller interrupt */ - rv = request_irq(SGI_UART_VECTOR, scdrv_event_interrupt, - IRQF_SHARED, "system controller events", event_sd); - if (rv) { - printk(KERN_WARNING "%s: irq request failed (%d)\n", - __func__, rv); - ia64_sn_irtr_close(event_sd->sd_nasid, event_sd->sd_subch); - kfree(event_sd); - return; - } -} |