drm/i915: Add current/max/min GPU freq to sysfs

[deliverable/linux.git] / drivers / gpu / drm / i915 / i915_sysfs.c

diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c
index c701a173bd48bee8f00e08a535b4c73753a88c6c..1da07e3e85af36232547dcf9dac5263215eff4f8 100644 (file)
--- a/drivers/gpu/drm/i915/i915_sysfs.c
+++ b/drivers/gpu/drm/i915/i915_sysfs.c
@@ -203,6 +203,69 @@ static struct bin_attribute dpf_attrs = {
        .mmap = NULL
 };
 
+static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
+                                   struct device_attribute *attr, char *buf)
+{
+       struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev);
+       struct drm_device *dev = minor->dev;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       int ret;
+
+       ret = i915_mutex_lock_interruptible(dev);
+       if (ret)
+               return ret;
+
+       ret = dev_priv->rps.cur_delay * GT_FREQUENCY_MULTIPLIER;
+       mutex_unlock(&dev->struct_mutex);
+
+       return snprintf(buf, PAGE_SIZE, "%d", ret);
+}
+
+static ssize_t gt_max_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
+{
+       struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev);
+       struct drm_device *dev = minor->dev;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       int ret;
+
+       ret = i915_mutex_lock_interruptible(dev);
+       if (ret)
+               return ret;
+
+       ret = dev_priv->rps.max_delay * GT_FREQUENCY_MULTIPLIER;
+       mutex_unlock(&dev->struct_mutex);
+
+       return snprintf(buf, PAGE_SIZE, "%d", ret);
+}
+
+static ssize_t gt_min_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
+{
+       struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev);
+       struct drm_device *dev = minor->dev;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       int ret;
+
+       ret = i915_mutex_lock_interruptible(dev);
+       if (ret)
+               return ret;
+
+       ret = dev_priv->rps.min_delay * GT_FREQUENCY_MULTIPLIER;
+       mutex_unlock(&dev->struct_mutex);
+
+       return snprintf(buf, PAGE_SIZE, "%d", ret);
+}
+
+static DEVICE_ATTR(gt_cur_freq_mhz, S_IRUGO, gt_cur_freq_mhz_show, NULL);
+static DEVICE_ATTR(gt_max_freq_mhz, S_IRUGO | S_IWUSR, gt_max_freq_mhz_show, NULL);
+static DEVICE_ATTR(gt_min_freq_mhz, S_IRUGO | S_IWUSR, gt_min_freq_mhz_show, NULL);
+
+static const struct attribute *gen6_attrs[] = {
+       &dev_attr_gt_cur_freq_mhz.attr,
+       &dev_attr_gt_max_freq_mhz.attr,
+       &dev_attr_gt_min_freq_mhz.attr,
+       NULL,
+};
+
 void i915_setup_sysfs(struct drm_device *dev)
 {
        int ret;
@@ -220,10 +283,17 @@ void i915_setup_sysfs(struct drm_device *dev)
                if (ret)
                        DRM_ERROR("l3 parity sysfs setup failed\n");
        }
+
+       if (INTEL_INFO(dev)->gen >= 6) {
+               ret = sysfs_create_files(&dev->primary->kdev.kobj, gen6_attrs);
+               if (ret)
+                       DRM_ERROR("gen6 sysfs setup failed\n");
+       }
 }
 
 void i915_teardown_sysfs(struct drm_device *dev)
 {
+       sysfs_remove_files(&dev->primary->kdev.kobj, gen6_attrs);
        device_remove_bin_file(&dev->primary->kdev,  &dpf_attrs);
        sysfs_unmerge_group(&dev->primary->kdev.kobj, &rc6_attr_group);
 }