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a85d4bcb8a
Chris' fix for my 32b breakage was incorrect. do_div returns a remainder. Go back to a divide macro which is more 32b friendly. Tested on x86-64. This has only been compile tested on 32b systems. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=48756 Cc: Chris Wilson <chris@chris-wilson.co.uk> Sincere-apologies: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Ben Widawsky <benjamin.widawsky@intel.com> [danvet: fixup 32bit compile-fail.] Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
112 lines
3.6 KiB
C
112 lines
3.6 KiB
C
/*
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* Copyright © 2012 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Ben Widawsky <ben@bwidawsk.net>
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*
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*/
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/stat.h>
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#include <linux/sysfs.h>
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#include "i915_drv.h"
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static u32 calc_residency(struct drm_device *dev, const u32 reg)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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u64 raw_time; /* 32b value may overflow during fixed point math */
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if (!intel_enable_rc6(dev))
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return 0;
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raw_time = I915_READ(reg) * 128ULL;
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return DIV_ROUND_UP_ULL(raw_time, 100000);
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}
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static ssize_t
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show_rc6_mask(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
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return snprintf(buf, PAGE_SIZE, "%x", intel_enable_rc6(dminor->dev));
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}
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static ssize_t
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show_rc6_ms(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
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u32 rc6_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6);
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return snprintf(buf, PAGE_SIZE, "%u", rc6_residency);
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}
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static ssize_t
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show_rc6p_ms(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
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u32 rc6p_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6p);
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return snprintf(buf, PAGE_SIZE, "%u", rc6p_residency);
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}
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static ssize_t
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show_rc6pp_ms(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
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u32 rc6pp_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6pp);
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return snprintf(buf, PAGE_SIZE, "%u", rc6pp_residency);
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}
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static DEVICE_ATTR(rc6_enable, S_IRUGO, show_rc6_mask, NULL);
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static DEVICE_ATTR(rc6_residency_ms, S_IRUGO, show_rc6_ms, NULL);
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static DEVICE_ATTR(rc6p_residency_ms, S_IRUGO, show_rc6p_ms, NULL);
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static DEVICE_ATTR(rc6pp_residency_ms, S_IRUGO, show_rc6pp_ms, NULL);
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static struct attribute *rc6_attrs[] = {
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&dev_attr_rc6_enable.attr,
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&dev_attr_rc6_residency_ms.attr,
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&dev_attr_rc6p_residency_ms.attr,
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&dev_attr_rc6pp_residency_ms.attr,
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NULL
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};
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static struct attribute_group rc6_attr_group = {
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.name = power_group_name,
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.attrs = rc6_attrs
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};
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void i915_setup_sysfs(struct drm_device *dev)
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{
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int ret;
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/* ILK doesn't have any residency information */
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if (INTEL_INFO(dev)->gen < 6)
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return;
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ret = sysfs_merge_group(&dev->primary->kdev.kobj, &rc6_attr_group);
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if (ret)
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DRM_ERROR("sysfs setup failed\n");
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}
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void i915_teardown_sysfs(struct drm_device *dev)
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{
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sysfs_unmerge_group(&dev->primary->kdev.kobj, &rc6_attr_group);
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}
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