2 * Copyright © 2012 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Ben Widawsky <ben@bwidawsk.net>
28 #include <linux/device.h>
29 #include <linux/module.h>
30 #include <linux/stat.h>
31 #include <linux/sysfs.h>
34 static u32 calc_residency(struct drm_device *dev, const u32 reg)
36 struct drm_i915_private *dev_priv = dev->dev_private;
37 u64 raw_time; /* 32b value may overflow during fixed point math */
39 if (!intel_enable_rc6(dev))
42 raw_time = I915_READ(reg) * 128ULL;
43 return DIV_ROUND_UP_ULL(raw_time, 100000);
47 show_rc6_mask(struct device *dev, struct device_attribute *attr, char *buf)
49 struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
50 return snprintf(buf, PAGE_SIZE, "%x", intel_enable_rc6(dminor->dev));
54 show_rc6_ms(struct device *dev, struct device_attribute *attr, char *buf)
56 struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
57 u32 rc6_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6);
58 return snprintf(buf, PAGE_SIZE, "%u", rc6_residency);
62 show_rc6p_ms(struct device *dev, struct device_attribute *attr, char *buf)
64 struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
65 u32 rc6p_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6p);
66 return snprintf(buf, PAGE_SIZE, "%u", rc6p_residency);
70 show_rc6pp_ms(struct device *dev, struct device_attribute *attr, char *buf)
72 struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
73 u32 rc6pp_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6pp);
74 return snprintf(buf, PAGE_SIZE, "%u", rc6pp_residency);
77 static DEVICE_ATTR(rc6_enable, S_IRUGO, show_rc6_mask, NULL);
78 static DEVICE_ATTR(rc6_residency_ms, S_IRUGO, show_rc6_ms, NULL);
79 static DEVICE_ATTR(rc6p_residency_ms, S_IRUGO, show_rc6p_ms, NULL);
80 static DEVICE_ATTR(rc6pp_residency_ms, S_IRUGO, show_rc6pp_ms, NULL);
82 static struct attribute *rc6_attrs[] = {
83 &dev_attr_rc6_enable.attr,
84 &dev_attr_rc6_residency_ms.attr,
85 &dev_attr_rc6p_residency_ms.attr,
86 &dev_attr_rc6pp_residency_ms.attr,
90 static struct attribute_group rc6_attr_group = {
91 .name = power_group_name,
95 void i915_setup_sysfs(struct drm_device *dev)
99 /* ILK doesn't have any residency information */
100 if (INTEL_INFO(dev)->gen < 6)
103 ret = sysfs_merge_group(&dev->primary->kdev.kobj, &rc6_attr_group);
105 DRM_ERROR("sysfs setup failed\n");
108 void i915_teardown_sysfs(struct drm_device *dev)
110 sysfs_unmerge_group(&dev->primary->kdev.kobj, &rc6_attr_group);