diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_sysfs.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_sysfs.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c new file mode 100644 index 000000000000..79f83445afa0 --- /dev/null +++ b/drivers/gpu/drm/i915/i915_sysfs.c @@ -0,0 +1,111 @@ +/* + * 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; + return DIV_ROUND_UP_ULL(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); +} |