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/*
* Copyright © 2012 Intel Corporation
*
* 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 (including the next
* paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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 Widawsky <ben@bwidawsk.net>
*
*/
#include <linux/device.h>
#include <linux/module.h>
#include <linux/stat.h>
#include <linux/sysfs.h>
#include "i915_drv.h"
static u32 calc_residency(struct drm_device *dev, const u32 reg)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u64 raw_time; /* 32b value may overflow during fixed point math */
if (!intel_enable_rc6(dev))
return 0;
raw_time = I915_READ(reg) * 128ULL + 500;
return do_div(raw_time, 100000);
}
static ssize_t
show_rc6_mask(struct device *dev, struct device_attribute *attr, char *buf)
{
struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
return snprintf(buf, PAGE_SIZE, "%x", intel_enable_rc6(dminor->dev));
}
static ssize_t
show_rc6_ms(struct device *dev, struct device_attribute *attr, char *buf)
{
struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
u32 rc6_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6);
return snprintf(buf, PAGE_SIZE, "%u", rc6_residency);
}
static ssize_t
show_rc6p_ms(struct device *dev, struct device_attribute *attr, char *buf)
{
struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
u32 rc6p_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6p);
return snprintf(buf, PAGE_SIZE, "%u", rc6p_residency);
}
static ssize_t
show_rc6pp_ms(struct device *dev, struct device_attribute *attr, char *buf)
{
struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
u32 rc6pp_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6pp);
return snprintf(buf, PAGE_SIZE, "%u", rc6pp_residency);
}
static DEVICE_ATTR(rc6_enable, S_IRUGO, show_rc6_mask, NULL);
static DEVICE_ATTR(rc6_residency_ms, S_IRUGO, show_rc6_ms, NULL);
static DEVICE_ATTR(rc6p_residency_ms, S_IRUGO, show_rc6p_ms, NULL);
static DEVICE_ATTR(rc6pp_residency_ms, S_IRUGO, show_rc6pp_ms, NULL);
static struct attribute *rc6_attrs[] = {
&dev_attr_rc6_enable.attr,
&dev_attr_rc6_residency_ms.attr,
&dev_attr_rc6p_residency_ms.attr,
&dev_attr_rc6pp_residency_ms.attr,
NULL
};
static struct attribute_group rc6_attr_group = {
.name = power_group_name,
.attrs = rc6_attrs
};
void i915_setup_sysfs(struct drm_device *dev)
{
int ret;
/* ILK doesn't have any residency information */
if (INTEL_INFO(dev)->gen < 6)
return;
ret = sysfs_merge_group(&dev->primary->kdev.kobj, &rc6_attr_group);
if (ret)
DRM_ERROR("sysfs setup failed\n");
}
void i915_teardown_sysfs(struct drm_device *dev)
{
sysfs_unmerge_group(&dev->primary->kdev.kobj, &rc6_attr_group);
}
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