Commit d8dd3cbc authored by Len Brown's avatar Len Brown
Browse files

Pull bugzilla-8842 into release branch

parents fc0dc4d3 0b5bfa1c
......@@ -1822,6 +1822,26 @@ and is between 256 and 4096 characters. It is defined in the file
thash_entries= [KNL,NET]
Set number of hash buckets for TCP connection
thermal.act= [HW,ACPI]
-1: disable all active trip points in all thermal zones
<degrees C>: override all lowest active trip points
thermal.nocrt= [HW,ACPI]
Set to disable actions on ACPI thermal zone
critical and hot trip points.
thermal.off= [HW,ACPI]
1: disable ACPI thermal control
thermal.psv= [HW,ACPI]
-1: disable all passive trip points
<degrees C>: override all passive trip points to this value
thermal.tzp= [HW,ACPI]
Specify global default ACPI thermal zone polling rate
<deci-seconds>: poll all this frequency
0: no polling (default)
time Show timing data prefixed to each printk message line
[deprecated, see 'printk.time']
......
......@@ -33,6 +33,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/dmi.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
......@@ -74,10 +75,26 @@ MODULE_AUTHOR("Paul Diefenbaugh");
MODULE_DESCRIPTION("ACPI Thermal Zone Driver");
MODULE_LICENSE("GPL");
static int act;
module_param(act, int, 0644);
MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.\n");
static int tzp;
module_param(tzp, int, 0);
module_param(tzp, int, 0444);
MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n");
static int nocrt;
module_param(nocrt, int, 0);
MODULE_PARM_DESC(nocrt, "Set to disable action on ACPI thermal zone critical and hot trips.\n");
static int off;
module_param(off, int, 0);
MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.\n");
static int psv;
module_param(psv, int, 0644);
MODULE_PARM_DESC(psv, "Disable or override all passive trip points.\n");
static int acpi_thermal_add(struct acpi_device *device);
static int acpi_thermal_remove(struct acpi_device *device, int type);
static int acpi_thermal_resume(struct acpi_device *device);
......@@ -339,9 +356,16 @@ static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
/* Passive: Processors (optional) */
status =
acpi_evaluate_integer(tz->device->handle, "_PSV", NULL,
&tz->trips.passive.temperature);
if (psv == -1) {
status = AE_SUPPORT;
} else if (psv > 0) {
tz->trips.passive.temperature = CELSIUS_TO_KELVIN(psv);
status = AE_OK;
} else {
status = acpi_evaluate_integer(tz->device->handle,
"_PSV", NULL, &tz->trips.passive.temperature);
}
if (ACPI_FAILURE(status)) {
tz->trips.passive.flags.valid = 0;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No passive threshold\n"));
......@@ -386,11 +410,33 @@ static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
status =
acpi_evaluate_integer(tz->device->handle, name, NULL,
&tz->trips.active[i].temperature);
if (ACPI_FAILURE(status))
if (act == -1)
break; /* disable all active trip points */
status = acpi_evaluate_integer(tz->device->handle,
name, NULL, &tz->trips.active[i].temperature);
if (ACPI_FAILURE(status)) {
if (i == 0) /* no active trip points */
break;
if (act <= 0) /* no override requested */
break;
if (i == 1) { /* 1 trip point */
tz->trips.active[0].temperature =
CELSIUS_TO_KELVIN(act);
} else { /* multiple trips */
/*
* Don't allow override higher than
* the next higher trip point
*/
tz->trips.active[i - 1].temperature =
(tz->trips.active[i - 2].temperature <
CELSIUS_TO_KELVIN(act) ?
tz->trips.active[i - 2].temperature :
CELSIUS_TO_KELVIN(act));
}
break;
}
name[2] = 'L';
status =
......@@ -427,7 +473,7 @@ static int acpi_thermal_get_devices(struct acpi_thermal *tz)
static int acpi_thermal_critical(struct acpi_thermal *tz)
{
if (!tz || !tz->trips.critical.flags.valid)
if (!tz || !tz->trips.critical.flags.valid || nocrt)
return -EINVAL;
if (tz->temperature >= tz->trips.critical.temperature) {
......@@ -449,7 +495,7 @@ static int acpi_thermal_critical(struct acpi_thermal *tz)
static int acpi_thermal_hot(struct acpi_thermal *tz)
{
if (!tz || !tz->trips.hot.flags.valid)
if (!tz || !tz->trips.hot.flags.valid || nocrt)
return -EINVAL;
if (tz->temperature >= tz->trips.hot.temperature) {
......@@ -824,12 +870,14 @@ static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset)
goto end;
if (tz->trips.critical.flags.valid)
seq_printf(seq, "critical (S5): %ld C\n",
KELVIN_TO_CELSIUS(tz->trips.critical.temperature));
seq_printf(seq, "critical (S5): %ld C%s",
KELVIN_TO_CELSIUS(tz->trips.critical.temperature),
nocrt ? " <disabled>\n" : "\n");
if (tz->trips.hot.flags.valid)
seq_printf(seq, "hot (S4): %ld C\n",
KELVIN_TO_CELSIUS(tz->trips.hot.temperature));
seq_printf(seq, "hot (S4): %ld C%s",
KELVIN_TO_CELSIUS(tz->trips.hot.temperature),
nocrt ? " <disabled>\n" : "\n");
if (tz->trips.passive.flags.valid) {
seq_printf(seq,
......@@ -1281,11 +1329,78 @@ static int acpi_thermal_resume(struct acpi_device *device)
return AE_OK;
}
#ifdef CONFIG_DMI
static int thermal_act(struct dmi_system_id *d) {
if (act == 0) {
printk(KERN_NOTICE "ACPI: %s detected: "
"disabling all active thermal trip points\n", d->ident);
act = -1;
}
return 0;
}
static int thermal_tzp(struct dmi_system_id *d) {
if (tzp == 0) {
printk(KERN_NOTICE "ACPI: %s detected: "
"enabling thermal zone polling\n", d->ident);
tzp = 300; /* 300 dS = 30 Seconds */
}
return 0;
}
static int thermal_psv(struct dmi_system_id *d) {
if (psv == 0) {
printk(KERN_NOTICE "ACPI: %s detected: "
"disabling all passive thermal trip points\n", d->ident);
psv = -1;
}
return 0;
}
static struct dmi_system_id thermal_dmi_table[] __initdata = {
/*
* Award BIOS on this AOpen makes thermal control almost worthless.
* http://bugzilla.kernel.org/show_bug.cgi?id=8842
*/
{
.callback = thermal_act,
.ident = "AOpen i915GMm-HFS",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
},
},
{
.callback = thermal_psv,
.ident = "AOpen i915GMm-HFS",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
},
},
{
.callback = thermal_tzp,
.ident = "AOpen i915GMm-HFS",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
},
},
{}
};
#endif /* CONFIG_DMI */
static int __init acpi_thermal_init(void)
{
int result = 0;
dmi_check_system(thermal_dmi_table);
if (off) {
printk(KERN_NOTICE "ACPI: thermal control disabled\n");
return -ENODEV;
}
acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir);
if (!acpi_thermal_dir)
return -ENODEV;
......
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