Ben Widawsky | 0136db58 | 2012-04-10 21:17:01 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright © 2012 Intel Corporation |
| 3 | * |
| 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: |
| 10 | * |
| 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 |
| 13 | * Software. |
| 14 | * |
| 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 |
| 21 | * IN THE SOFTWARE. |
| 22 | * |
| 23 | * Authors: |
| 24 | * Ben Widawsky <ben@bwidawsk.net> |
| 25 | * |
| 26 | */ |
| 27 | |
| 28 | #include <linux/device.h> |
| 29 | #include <linux/module.h> |
| 30 | #include <linux/stat.h> |
| 31 | #include <linux/sysfs.h> |
| 32 | #include "i915_drv.h" |
| 33 | |
| 34 | static u32 calc_residency(struct drm_device *dev, const u32 reg) |
| 35 | { |
| 36 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 37 | u64 raw_time; /* 32b value may overflow during fixed point math */ |
| 38 | |
| 39 | if (!intel_enable_rc6(dev)) |
| 40 | return 0; |
| 41 | |
Ben Widawsky | a85d4bc | 2012-04-20 11:50:01 -0700 | [diff] [blame^] | 42 | raw_time = I915_READ(reg) * 128ULL; |
| 43 | return DIV_ROUND_UP_ULL(raw_time, 100000); |
Ben Widawsky | 0136db58 | 2012-04-10 21:17:01 -0700 | [diff] [blame] | 44 | } |
| 45 | |
| 46 | static ssize_t |
| 47 | show_rc6_mask(struct device *dev, struct device_attribute *attr, char *buf) |
| 48 | { |
| 49 | struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev); |
| 50 | return snprintf(buf, PAGE_SIZE, "%x", intel_enable_rc6(dminor->dev)); |
| 51 | } |
| 52 | |
| 53 | static ssize_t |
| 54 | show_rc6_ms(struct device *dev, struct device_attribute *attr, char *buf) |
| 55 | { |
| 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); |
| 59 | } |
| 60 | |
| 61 | static ssize_t |
| 62 | show_rc6p_ms(struct device *dev, struct device_attribute *attr, char *buf) |
| 63 | { |
| 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); |
| 67 | } |
| 68 | |
| 69 | static ssize_t |
| 70 | show_rc6pp_ms(struct device *dev, struct device_attribute *attr, char *buf) |
| 71 | { |
| 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); |
| 75 | } |
| 76 | |
| 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); |
| 81 | |
| 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, |
| 87 | NULL |
| 88 | }; |
| 89 | |
| 90 | static struct attribute_group rc6_attr_group = { |
| 91 | .name = power_group_name, |
| 92 | .attrs = rc6_attrs |
| 93 | }; |
| 94 | |
| 95 | void i915_setup_sysfs(struct drm_device *dev) |
| 96 | { |
| 97 | int ret; |
| 98 | |
| 99 | /* ILK doesn't have any residency information */ |
| 100 | if (INTEL_INFO(dev)->gen < 6) |
| 101 | return; |
| 102 | |
| 103 | ret = sysfs_merge_group(&dev->primary->kdev.kobj, &rc6_attr_group); |
| 104 | if (ret) |
| 105 | DRM_ERROR("sysfs setup failed\n"); |
| 106 | } |
| 107 | |
| 108 | void i915_teardown_sysfs(struct drm_device *dev) |
| 109 | { |
| 110 | sysfs_unmerge_group(&dev->primary->kdev.kobj, &rc6_attr_group); |
| 111 | } |