linux/drivers/gpu/drm/nouveau/nouveau_pm.c

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/*
* Copyright 2010 Red Hat 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: Ben Skeggs
*/
#include "drmP.h"
#include "nouveau_drv.h"
#include "nouveau_pm.h"
#ifdef CONFIG_ACPI
#include <linux/acpi.h>
#endif
#include <linux/power_supply.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
static int
nouveau_pm_clock_set(struct drm_device *dev, struct nouveau_pm_level *perflvl,
u8 id, u32 khz)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
void *pre_state;
if (khz == 0)
return 0;
pre_state = pm->clock_pre(dev, perflvl, id, khz);
if (IS_ERR(pre_state))
return PTR_ERR(pre_state);
if (pre_state)
pm->clock_set(dev, pre_state);
return 0;
}
static int
nouveau_pm_perflvl_set(struct drm_device *dev, struct nouveau_pm_level *perflvl)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
int ret;
if (perflvl == pm->cur)
return 0;
if (pm->voltage.supported && pm->voltage_set && perflvl->volt_min) {
ret = pm->voltage_set(dev, perflvl->volt_min);
if (ret) {
NV_ERROR(dev, "voltage_set %d failed: %d\n",
perflvl->volt_min, ret);
}
}
nouveau_pm_clock_set(dev, perflvl, PLL_CORE, perflvl->core);
nouveau_pm_clock_set(dev, perflvl, PLL_SHADER, perflvl->shader);
nouveau_pm_clock_set(dev, perflvl, PLL_MEMORY, perflvl->memory);
nouveau_pm_clock_set(dev, perflvl, PLL_UNK05, perflvl->unk05);
pm->cur = perflvl;
return 0;
}
static int
nouveau_pm_profile_set(struct drm_device *dev, const char *profile)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
struct nouveau_pm_level *perflvl = NULL;
/* safety precaution, for now */
if (nouveau_perflvl_wr != 7777)
return -EPERM;
if (!pm->clock_set)
return -EINVAL;
if (!strncmp(profile, "boot", 4))
perflvl = &pm->boot;
else {
int pl = simple_strtol(profile, NULL, 10);
int i;
for (i = 0; i < pm->nr_perflvl; i++) {
if (pm->perflvl[i].id == pl) {
perflvl = &pm->perflvl[i];
break;
}
}
if (!perflvl)
return -EINVAL;
}
NV_INFO(dev, "setting performance level: %s\n", profile);
return nouveau_pm_perflvl_set(dev, perflvl);
}
static int
nouveau_pm_perflvl_get(struct drm_device *dev, struct nouveau_pm_level *perflvl)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
int ret;
if (!pm->clock_get)
return -EINVAL;
memset(perflvl, 0, sizeof(*perflvl));
ret = pm->clock_get(dev, PLL_CORE);
if (ret > 0)
perflvl->core = ret;
ret = pm->clock_get(dev, PLL_MEMORY);
if (ret > 0)
perflvl->memory = ret;
ret = pm->clock_get(dev, PLL_SHADER);
if (ret > 0)
perflvl->shader = ret;
ret = pm->clock_get(dev, PLL_UNK05);
if (ret > 0)
perflvl->unk05 = ret;
if (pm->voltage.supported && pm->voltage_get) {
ret = pm->voltage_get(dev);
if (ret > 0) {
perflvl->volt_min = ret;
perflvl->volt_max = ret;
}
}
return 0;
}
static void
nouveau_pm_perflvl_info(struct nouveau_pm_level *perflvl, char *ptr, int len)
{
char c[16], s[16], v[32], f[16], t[16];
c[0] = '\0';
if (perflvl->core)
snprintf(c, sizeof(c), " core %dMHz", perflvl->core / 1000);
s[0] = '\0';
if (perflvl->shader)
snprintf(s, sizeof(s), " shader %dMHz", perflvl->shader / 1000);
v[0] = '\0';
if (perflvl->volt_min && perflvl->volt_min != perflvl->volt_max) {
snprintf(v, sizeof(v), " voltage %dmV-%dmV",
perflvl->volt_min / 1000, perflvl->volt_max / 1000);
} else
if (perflvl->volt_min) {
snprintf(v, sizeof(v), " voltage %dmV",
perflvl->volt_min / 1000);
}
f[0] = '\0';
if (perflvl->fanspeed)
snprintf(f, sizeof(f), " fanspeed %d%%", perflvl->fanspeed);
t[0] = '\0';
if (perflvl->timing)
snprintf(t, sizeof(t), " timing %d", perflvl->timing->id);
snprintf(ptr, len, "memory %dMHz%s%s%s%s%s\n", perflvl->memory / 1000,
c, s, v, f, t);
}
static ssize_t
nouveau_pm_get_perflvl_info(struct device *d,
struct device_attribute *a, char *buf)
{
struct nouveau_pm_level *perflvl = (struct nouveau_pm_level *)a;
char *ptr = buf;
int len = PAGE_SIZE;
snprintf(ptr, len, "%d: ", perflvl->id);
ptr += strlen(buf);
len -= strlen(buf);
nouveau_pm_perflvl_info(perflvl, ptr, len);
return strlen(buf);
}
static ssize_t
nouveau_pm_get_perflvl(struct device *d, struct device_attribute *a, char *buf)
{
struct drm_device *dev = pci_get_drvdata(to_pci_dev(d));
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
struct nouveau_pm_level cur;
int len = PAGE_SIZE, ret;
char *ptr = buf;
if (!pm->cur)
snprintf(ptr, len, "setting: boot\n");
else if (pm->cur == &pm->boot)
snprintf(ptr, len, "setting: boot\nc: ");
else
snprintf(ptr, len, "setting: static %d\nc: ", pm->cur->id);
ptr += strlen(buf);
len -= strlen(buf);
ret = nouveau_pm_perflvl_get(dev, &cur);
if (ret == 0)
nouveau_pm_perflvl_info(&cur, ptr, len);
return strlen(buf);
}
static ssize_t
nouveau_pm_set_perflvl(struct device *d, struct device_attribute *a,
const char *buf, size_t count)
{
struct drm_device *dev = pci_get_drvdata(to_pci_dev(d));
int ret;
ret = nouveau_pm_profile_set(dev, buf);
if (ret)
return ret;
return strlen(buf);
}
static DEVICE_ATTR(performance_level, S_IRUGO | S_IWUSR,
nouveau_pm_get_perflvl, nouveau_pm_set_perflvl);
static int
nouveau_sysfs_init(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
struct device *d = &dev->pdev->dev;
int ret, i;
ret = device_create_file(d, &dev_attr_performance_level);
if (ret)
return ret;
for (i = 0; i < pm->nr_perflvl; i++) {
struct nouveau_pm_level *perflvl = &pm->perflvl[i];
perflvl->dev_attr.attr.name = perflvl->name;
perflvl->dev_attr.attr.mode = S_IRUGO;
perflvl->dev_attr.show = nouveau_pm_get_perflvl_info;
perflvl->dev_attr.store = NULL;
sysfs_attr_init(&perflvl->dev_attr.attr);
ret = device_create_file(d, &perflvl->dev_attr);
if (ret) {
NV_ERROR(dev, "failed pervlvl %d sysfs: %d\n",
perflvl->id, i);
perflvl->dev_attr.attr.name = NULL;
nouveau_pm_fini(dev);
return ret;
}
}
return 0;
}
static void
nouveau_sysfs_fini(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
struct device *d = &dev->pdev->dev;
int i;
device_remove_file(d, &dev_attr_performance_level);
for (i = 0; i < pm->nr_perflvl; i++) {
struct nouveau_pm_level *pl = &pm->perflvl[i];
if (!pl->dev_attr.attr.name)
break;
device_remove_file(d, &pl->dev_attr);
}
}
#ifdef CONFIG_HWMON
static ssize_t
nouveau_hwmon_show_temp(struct device *d, struct device_attribute *a, char *buf)
{
struct drm_device *dev = dev_get_drvdata(d);
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
return snprintf(buf, PAGE_SIZE, "%d\n", pm->temp_get(dev)*1000);
}
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, nouveau_hwmon_show_temp,
NULL, 0);
static ssize_t
nouveau_hwmon_max_temp(struct device *d, struct device_attribute *a, char *buf)
{
struct drm_device *dev = dev_get_drvdata(d);
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
return snprintf(buf, PAGE_SIZE, "%d\n", temp->down_clock*1000);
}
static ssize_t
nouveau_hwmon_set_max_temp(struct device *d, struct device_attribute *a,
const char *buf, size_t count)
{
struct drm_device *dev = dev_get_drvdata(d);
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
long value;
if (strict_strtol(buf, 10, &value) == -EINVAL)
return count;
temp->down_clock = value/1000;
nouveau_temp_safety_checks(dev);
return count;
}
static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, nouveau_hwmon_max_temp,
nouveau_hwmon_set_max_temp,
0);
static ssize_t
nouveau_hwmon_critical_temp(struct device *d, struct device_attribute *a,
char *buf)
{
struct drm_device *dev = dev_get_drvdata(d);
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
return snprintf(buf, PAGE_SIZE, "%d\n", temp->critical*1000);
}
static ssize_t
nouveau_hwmon_set_critical_temp(struct device *d, struct device_attribute *a,
const char *buf,
size_t count)
{
struct drm_device *dev = dev_get_drvdata(d);
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
struct nouveau_pm_threshold_temp *temp = &pm->threshold_temp;
long value;
if (strict_strtol(buf, 10, &value) == -EINVAL)
return count;
temp->critical = value/1000;
nouveau_temp_safety_checks(dev);
return count;
}
static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO | S_IWUSR,
nouveau_hwmon_critical_temp,
nouveau_hwmon_set_critical_temp,
0);
static ssize_t nouveau_hwmon_show_name(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "nouveau\n");
}
static SENSOR_DEVICE_ATTR(name, S_IRUGO, nouveau_hwmon_show_name, NULL, 0);
static ssize_t nouveau_hwmon_show_update_rate(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "1000\n");
}
static SENSOR_DEVICE_ATTR(update_rate, S_IRUGO,
nouveau_hwmon_show_update_rate,
NULL, 0);
static struct attribute *hwmon_attributes[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp1_crit.dev_attr.attr,
&sensor_dev_attr_name.dev_attr.attr,
&sensor_dev_attr_update_rate.dev_attr.attr,
NULL
};
static const struct attribute_group hwmon_attrgroup = {
.attrs = hwmon_attributes,
};
#endif
static int
nouveau_hwmon_init(struct drm_device *dev)
{
#ifdef CONFIG_HWMON
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
struct device *hwmon_dev;
int ret;
if (!pm->temp_get)
return -ENODEV;
hwmon_dev = hwmon_device_register(&dev->pdev->dev);
if (IS_ERR(hwmon_dev)) {
ret = PTR_ERR(hwmon_dev);
NV_ERROR(dev,
"Unable to register hwmon device: %d\n", ret);
return ret;
}
dev_set_drvdata(hwmon_dev, dev);
ret = sysfs_create_group(&dev->pdev->dev.kobj, &hwmon_attrgroup);
if (ret) {
NV_ERROR(dev,
"Unable to create hwmon sysfs file: %d\n", ret);
hwmon_device_unregister(hwmon_dev);
return ret;
}
pm->hwmon = hwmon_dev;
#endif
return 0;
}
static void
nouveau_hwmon_fini(struct drm_device *dev)
{
#ifdef CONFIG_HWMON
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
if (pm->hwmon) {
sysfs_remove_group(&dev->pdev->dev.kobj, &hwmon_attrgroup);
hwmon_device_unregister(pm->hwmon);
}
#endif
}
#if defined(CONFIG_ACPI) && defined(CONFIG_POWER_SUPPLY)
static int
nouveau_pm_acpi_event(struct notifier_block *nb, unsigned long val, void *data)
{
struct drm_nouveau_private *dev_priv =
container_of(nb, struct drm_nouveau_private, engine.pm.acpi_nb);
struct drm_device *dev = dev_priv->dev;
struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
if (strcmp(entry->device_class, "ac_adapter") == 0) {
bool ac = power_supply_is_system_supplied();
NV_DEBUG(dev, "power supply changed: %s\n", ac ? "AC" : "DC");
}
return NOTIFY_OK;
}
#endif
int
nouveau_pm_init(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
char info[256];
int ret, i;
nouveau_mem_timing_init(dev);
nouveau_volt_init(dev);
nouveau_perf_init(dev);
nouveau_temp_init(dev);
NV_INFO(dev, "%d available performance level(s)\n", pm->nr_perflvl);
for (i = 0; i < pm->nr_perflvl; i++) {
nouveau_pm_perflvl_info(&pm->perflvl[i], info, sizeof(info));
NV_INFO(dev, "%d: %s", pm->perflvl[i].id, info);
}
/* determine current ("boot") performance level */
ret = nouveau_pm_perflvl_get(dev, &pm->boot);
if (ret == 0) {
strncpy(pm->boot.name, "boot", 4);
pm->cur = &pm->boot;
nouveau_pm_perflvl_info(&pm->boot, info, sizeof(info));
NV_INFO(dev, "c: %s", info);
}
/* switch performance levels now if requested */
if (nouveau_perflvl != NULL) {
ret = nouveau_pm_profile_set(dev, nouveau_perflvl);
if (ret) {
NV_ERROR(dev, "error setting perflvl \"%s\": %d\n",
nouveau_perflvl, ret);
}
}
nouveau_sysfs_init(dev);
nouveau_hwmon_init(dev);
#if defined(CONFIG_ACPI) && defined(CONFIG_POWER_SUPPLY)
pm->acpi_nb.notifier_call = nouveau_pm_acpi_event;
register_acpi_notifier(&pm->acpi_nb);
#endif
return 0;
}
void
nouveau_pm_fini(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
if (pm->cur != &pm->boot)
nouveau_pm_perflvl_set(dev, &pm->boot);
nouveau_temp_fini(dev);
nouveau_perf_fini(dev);
nouveau_volt_fini(dev);
nouveau_mem_timing_fini(dev);
#if defined(CONFIG_ACPI) && defined(CONFIG_POWER_SUPPLY)
unregister_acpi_notifier(&pm->acpi_nb);
#endif
nouveau_hwmon_fini(dev);
nouveau_sysfs_fini(dev);
}
void
nouveau_pm_resume(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_level *perflvl;
if (!pm->cur || pm->cur == &pm->boot)
return;
perflvl = pm->cur;
pm->cur = &pm->boot;
nouveau_pm_perflvl_set(dev, perflvl);
}