drm/nouveau: Add temperature support (vbios parsing, readings, hwmon)

Signed-off-by: Martin Peres <martin.peres@ensi-bourges.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 272 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_temp.c b/drivers/gpu/drm/nouveau/nouveau_temp.c
new file mode 100644
index 0000000..3394075
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_temp.c
@@ -0,0 +1,272 @@
+/*
+ * Copyright 2010 PathScale inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Martin Peres
+ */
+
+#include "drmP.h"
+
+#include "nouveau_drv.h"
+#include "nouveau_pm.h"
+
+void
+nouveau_temp_vbios_parse(struct drm_device *dev, u8 *temp)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
+	struct nouveau_pm_temp_sensor_constants *sensor = &pm->sensor_constants;
+	struct nouveau_pm_threshold_temp *temps = &pm->threshold_temp;
+	int i, headerlen, recordlen, entries;
+
+	if (!temp) {
+		NV_DEBUG(dev, "temperature table pointer invalid\n");
+		return;
+	}
+
+	/* Set the default sensor's contants */
+	sensor->offset_constant = 0;
+	sensor->offset_mult = 1;
+	sensor->offset_div = 1;
+	sensor->slope_mult = 1;
+	sensor->slope_div = 1;
+
+	/* Set the default temperature thresholds */
+	temps->critical = 110;
+	temps->down_clock = 100;
+	temps->fan_boost = 90;
+
+	/* Set the known default values to setup the temperature sensor */
+	if (dev_priv->card_type >= NV_40) {
+		switch (dev_priv->chipset) {
+		case 0x43:
+			sensor->offset_mult = 32060;
+			sensor->offset_div = 1000;
+			sensor->slope_mult = 792;
+			sensor->slope_div = 1000;
+			break;
+
+		case 0x44:
+		case 0x47:
+			sensor->offset_mult = 27839;
+			sensor->offset_div = 1000;
+			sensor->slope_mult = 780;
+			sensor->slope_div = 1000;
+			break;
+
+		case 0x46:
+			sensor->offset_mult = -24775;
+			sensor->offset_div = 100;
+			sensor->slope_mult = 467;
+			sensor->slope_div = 10000;
+			break;
+
+		case 0x49:
+			sensor->offset_mult = -25051;
+			sensor->offset_div = 100;
+			sensor->slope_mult = 458;
+			sensor->slope_div = 10000;
+			break;
+
+		case 0x4b:
+			sensor->offset_mult = -24088;
+			sensor->offset_div = 100;
+			sensor->slope_mult = 442;
+			sensor->slope_div = 10000;
+			break;
+
+		case 0x50:
+			sensor->offset_mult = -22749;
+			sensor->offset_div = 100;
+			sensor->slope_mult = 431;
+			sensor->slope_div = 10000;
+			break;
+		}
+	}
+
+	headerlen = temp[1];
+	recordlen = temp[2];
+	entries = temp[3];
+	temp = temp + headerlen;
+
+	/* Read the entries from the table */
+	for (i = 0; i < entries; i++) {
+		u16 value = ROM16(temp[1]);
+
+		switch (temp[0]) {
+		case 0x01:
+			value = (value&0x8f) == 0 ? (value >> 9) & 0x7f : 0;
+			sensor->offset_constant = value;
+			break;
+
+		case 0x04:
+			if ((value & 0xf00f) == 0xa000) /* core */
+				temps->critical = (value&0x0ff0) >> 4;
+			break;
+
+		case 0x07:
+			if ((value & 0xf00f) == 0xa000) /* core */
+				temps->down_clock = (value&0x0ff0) >> 4;
+			break;
+
+		case 0x08:
+			if ((value & 0xf00f) == 0xa000) /* core */
+				temps->fan_boost = (value&0x0ff0) >> 4;
+			break;
+
+		case 0x10:
+			sensor->offset_mult = value;
+			break;
+
+		case 0x11:
+			sensor->offset_div = value;
+			break;
+
+		case 0x12:
+			sensor->slope_mult = value;
+			break;
+
+		case 0x13:
+			sensor->slope_div = value;
+			break;
+		}
+		temp += recordlen;
+	}
+
+	nouveau_temp_safety_checks(dev);
+}
+
+static s16
+nouveau_nv40_sensor_setup(struct drm_device *dev)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
+	struct nouveau_pm_temp_sensor_constants *sensor = &pm->sensor_constants;
+	u32 offset = sensor->offset_mult / sensor->offset_div;
+	u32 sensor_calibration;
+
+	/* set up the sensors */
+	sensor_calibration = 120 - offset - sensor->offset_constant;
+	sensor_calibration = sensor_calibration * sensor->slope_div /
+				sensor->slope_mult;
+
+	if (dev_priv->chipset >= 0x46)
+		sensor_calibration |= 0x80000000;
+	else
+		sensor_calibration |= 0x10000000;
+
+	nv_wr32(dev, 0x0015b0, sensor_calibration);
+
+	/* Wait for the sensor to update */
+	msleep(5);
+
+	/* read */
+	return nv_rd32(dev, 0x0015b4);
+}
+
+s16
+nouveau_temp_get(struct drm_device *dev)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
+	struct nouveau_pm_temp_sensor_constants *sensor = &pm->sensor_constants;
+
+	if (dev_priv->chipset >= 0x84) {
+		return nv_rd32(dev, 0x20400);
+	} else if (dev_priv->chipset >= 0x40) {
+		u32 offset = sensor->offset_mult / sensor->offset_div;
+		u32 core_temp;
+
+		if (dev_priv->chipset >= 0x50) {
+			core_temp = nv_rd32(dev, 0x20008);
+		} else {
+			core_temp = nv_rd32(dev, 0x0015b4);
+			/* Setup the sensor if the temperature is 0 */
+			if (core_temp == 0)
+				core_temp = nouveau_nv40_sensor_setup(dev);
+		}
+
+		core_temp = core_temp * sensor->slope_mult / sensor->slope_div;
+		core_temp = core_temp + offset + sensor->offset_constant;
+
+		return core_temp;
+	} else {
+		NV_ERROR(dev,
+				 "Temperature cannot be retrieved from an nv%x card\n",
+				 dev_priv->chipset);
+		return 0;
+	}
+
+	return 0;
+}
+
+void
+nouveau_temp_safety_checks(struct drm_device *dev)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
+	struct nouveau_pm_threshold_temp *temps = &pm->threshold_temp;
+
+	if (temps->critical > 120)
+		temps->critical = 120;
+	else if (temps->critical < 80)
+		temps->critical = 80;
+
+	if (temps->down_clock > 110)
+		temps->down_clock = 110;
+	else if (temps->down_clock < 60)
+		temps->down_clock = 60;
+
+	if (temps->fan_boost > 100)
+		temps->fan_boost = 100;
+	else if (temps->fan_boost < 40)
+		temps->fan_boost = 40;
+}
+
+void
+nouveau_temp_init(struct drm_device *dev)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nvbios *bios = &dev_priv->vbios;
+	struct bit_entry P;
+	u8 *temp = NULL;
+
+	if (bios->type == NVBIOS_BIT) {
+		if (bit_table(dev, 'P', &P))
+			return;
+
+		if (P.version == 1)
+			temp = ROMPTR(bios, P.data[12]);
+		else if (P.version == 2)
+			temp = ROMPTR(bios, P.data[16]);
+		else
+			NV_WARN(dev, "unknown temp for BIT P %d\n", P.version);
+	} else {
+		NV_WARN(dev, "BMP entry unknown for temperature table.\n");
+	}
+
+	nouveau_temp_vbios_parse(dev, temp);
+}
+
+void
+nouveau_temp_fini(struct drm_device *dev)
+{
+
+}