diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_perf.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_perf.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c index 54653bcf0d79..c427cd8cbe1b 100644 --- a/drivers/gpu/drm/i915/i915_perf.c +++ b/drivers/gpu/drm/i915/i915_perf.c @@ -812,6 +812,15 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream, int format_size; int ret; + /* If the sysfs metrics/ directory wasn't registered for some + * reason then don't let userspace try their luck with config + * IDs + */ + if (!dev_priv->perf.metrics_kobj) { + DRM_ERROR("OA metrics weren't advertised via sysfs\n"); + return -EINVAL; + } + if (!(props->sample_flags & SAMPLE_OA_REPORT)) { DRM_ERROR("Only OA report sampling supported\n"); return -EINVAL; @@ -1408,6 +1417,49 @@ int i915_perf_open_ioctl(struct drm_device *dev, void *data, return ret; } +void i915_perf_register(struct drm_i915_private *dev_priv) +{ + if (!IS_HASWELL(dev_priv)) + return; + + if (!dev_priv->perf.initialized) + return; + + /* To be sure we're synchronized with an attempted + * i915_perf_open_ioctl(); considering that we register after + * being exposed to userspace. + */ + mutex_lock(&dev_priv->perf.lock); + + dev_priv->perf.metrics_kobj = + kobject_create_and_add("metrics", + &dev_priv->drm.primary->kdev->kobj); + if (!dev_priv->perf.metrics_kobj) + goto exit; + + if (i915_perf_register_sysfs_hsw(dev_priv)) { + kobject_put(dev_priv->perf.metrics_kobj); + dev_priv->perf.metrics_kobj = NULL; + } + +exit: + mutex_unlock(&dev_priv->perf.lock); +} + +void i915_perf_unregister(struct drm_i915_private *dev_priv) +{ + if (!IS_HASWELL(dev_priv)) + return; + + if (!dev_priv->perf.metrics_kobj) + return; + + i915_perf_unregister_sysfs_hsw(dev_priv); + + kobject_put(dev_priv->perf.metrics_kobj); + dev_priv->perf.metrics_kobj = NULL; +} + void i915_perf_init(struct drm_i915_private *dev_priv) { if (!IS_HASWELL(dev_priv)) |