1 files changed, 190 insertions, 44 deletions

diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 88a6fc7fd271..ad898e10c1a9 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -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>
@@ -40,6 +41,7 @@
 #include <linux/jiffies.h>
 #include <linux/kmod.h>
 #include <linux/seq_file.h>
+#include <linux/reboot.h>
 #include <asm/uaccess.h>
 
 #include <acpi/acpi_bus.h>
@@ -59,7 +61,6 @@
 #define ACPI_THERMAL_NOTIFY_CRITICAL	0xF0
 #define ACPI_THERMAL_NOTIFY_HOT		0xF1
 #define ACPI_THERMAL_MODE_ACTIVE	0x00
-#define ACPI_THERMAL_PATH_POWEROFF	"/sbin/poweroff"
 
 #define ACPI_THERMAL_MAX_ACTIVE	10
 #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65
@@ -74,9 +75,29 @@ 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.");
+
+static int crt;
+module_param(crt, int, 0644);
+MODULE_PARM_DESC(crt, "Disable or lower all critical trip points.");
+
 static int tzp;
-module_param(tzp, int, 0);
-MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n");
+module_param(tzp, int, 0444);
+MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.");
+
+static int nocrt;
+module_param(nocrt, int, 0);
+MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points.");
+
+static int off;
+module_param(off, int, 0);
+MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.");
+
+static int psv;
+module_param(psv, int, 0644);
+MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
 
 static int acpi_thermal_add(struct acpi_device *device);
 static int acpi_thermal_remove(struct acpi_device *device, int type);
@@ -92,10 +113,16 @@ static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file);
 static ssize_t acpi_thermal_write_polling(struct file *, const char __user *,
 					  size_t, loff_t *);
 
+static const struct acpi_device_id  thermal_device_ids[] = {
+	{ACPI_THERMAL_HID, 0},
+	{"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, thermal_device_ids);
+
 static struct acpi_driver acpi_thermal_driver = {
 	.name = "thermal",
 	.class = ACPI_THERMAL_CLASS,
-	.ids = ACPI_THERMAL_HID,
+	.ids = thermal_device_ids,
 	.ops = {
 		.add = acpi_thermal_add,
 		.remove = acpi_thermal_remove,
@@ -317,6 +344,20 @@ static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
 				  tz->trips.critical.temperature));
 	}
 
+	if (tz->trips.critical.flags.valid == 1) {
+		if (crt == -1) {
+			tz->trips.critical.flags.valid = 0;
+		} else if (crt > 0) {
+			unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
+
+			/*
+			 * Allow override to lower critical threshold
+			 */
+			if (crt_k < tz->trips.critical.temperature)
+				tz->trips.critical.temperature = crt_k;
+		}
+	}
+
 	/* Critical Sleep (optional) */
 
 	status =
@@ -333,9 +374,16 @@ 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"));
@@ -380,11 +428,33 @@ 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 =
@@ -419,29 +489,9 @@ static int acpi_thermal_get_devices(struct acpi_thermal *tz)
 	return 0;
 }
 
-static int acpi_thermal_call_usermode(char *path)
-{
-	char *argv[2] = { NULL, NULL };
-	char *envp[3] = { NULL, NULL, NULL };
-
-
-	if (!path)
-		return -EINVAL;
-
-	argv[0] = path;
-
-	/* minimal command environment */
-	envp[0] = "HOME=/";
-	envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
-
-	call_usermodehelper(argv[0], argv, envp, 0);
-
-	return 0;
-}
-
 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) {
@@ -453,17 +503,21 @@ static int acpi_thermal_critical(struct acpi_thermal *tz)
 	printk(KERN_EMERG
 	       "Critical temperature reached (%ld C), shutting down.\n",
 	       KELVIN_TO_CELSIUS(tz->temperature));
-	acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL,
+	acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL,
 				tz->trips.critical.flags.enabled);
+	acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
+					  tz->device->dev.bus_id,
+					  ACPI_THERMAL_NOTIFY_CRITICAL,
+					  tz->trips.critical.flags.enabled);
 
-	acpi_thermal_call_usermode(ACPI_THERMAL_PATH_POWEROFF);
+	orderly_poweroff(true);
 
 	return 0;
 }
 
 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) {
@@ -472,8 +526,12 @@ static int acpi_thermal_hot(struct acpi_thermal *tz)
 	} else if (tz->trips.hot.flags.enabled)
 		tz->trips.hot.flags.enabled = 0;
 
-	acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_HOT,
+	acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_HOT,
 				tz->trips.hot.flags.enabled);
+	acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
+					  tz->device->dev.bus_id,
+					  ACPI_THERMAL_NOTIFY_HOT,
+					  tz->trips.hot.flags.enabled);
 
 	/* TBD: Call user-mode "sleep(S4)" function */
 
@@ -838,12 +896,14 @@ 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,
@@ -1033,9 +1093,9 @@ static int acpi_thermal_add_fs(struct acpi_device *device)
 		entry->owner = THIS_MODULE;
 	}
 
-	/* 'trip_points' [R/W] */
+	/* 'trip_points' [R] */
 	entry = create_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS,
-				  S_IFREG | S_IRUGO | S_IWUSR,
+				  S_IRUGO,
 				  acpi_device_dir(device));
 	if (!entry)
 		return -ENODEV;
@@ -1115,12 +1175,16 @@ static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data)
 	case ACPI_THERMAL_NOTIFY_THRESHOLDS:
 		acpi_thermal_get_trip_points(tz);
 		acpi_thermal_check(tz);
-		acpi_bus_generate_event(device, event, 0);
+		acpi_bus_generate_proc_event(device, event, 0);
+		acpi_bus_generate_netlink_event(device->pnp.device_class,
+						  device->dev.bus_id, event, 0);
 		break;
 	case ACPI_THERMAL_NOTIFY_DEVICES:
 		if (tz->flags.devices)
 			acpi_thermal_get_devices(tz);
-		acpi_bus_generate_event(device, event, 0);
+		acpi_bus_generate_proc_event(device, event, 0);
+		acpi_bus_generate_netlink_event(device->pnp.device_class,
+						  device->dev.bus_id, event, 0);
 		break;
 	default:
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
@@ -1295,11 +1359,93 @@ static int acpi_thermal_resume(struct acpi_device *device)
 	return AE_OK;
 }
 
+#ifdef CONFIG_DMI
+static int thermal_act(const 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_nocrt(const struct dmi_system_id *d) {
+
+	printk(KERN_NOTICE "ACPI: %s detected: "
+		"disabling all critical thermal trip point actions.\n", d->ident);
+	nocrt = 1;
+	return 0;
+}
+static int thermal_tzp(const 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(const 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"),
+		},
+	},
+	{
+	 .callback = thermal_nocrt,
+	 .ident = "Gigabyte GA-7ZX",
+	 .matches = {
+		DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
+		DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
+		},
+	},
+	{}
+};
+#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;