Commit 7708550c authored by Robert Bragg's avatar Robert Bragg Committed by Daniel Vetter
Browse files

drm/i915/perf: use DRM_DEBUG for userspace issues 



Avoid using DRM_ERROR for conditions userspace can trigger with a bad
config when opening a stream or from not reading data in a timely
fashion (whereby the OA buffer fills up). These conditions are tested
by i-g-t which treats error messages as failures if using the test
runner. This wasn't an issue while the i915-perf igt tests were being
run in isolation.

One message relating to seeing a spurious zeroed report was changed to
use DRM_NOTE instead of DRM_ERROR. Ideally this warning shouldn't be
seen, but it's not a serious problem if it is. Considering that the
tail margin mechanism is only a heuristic it's possible we might see
this from time to time.

Signed-off-by: default avatarRobert Bragg <robert@sixbynine.org:>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161201172152.10893-1-robert@sixbynine.org
parent 467a14d9

drivers/gpu/drm/i915/i915_perf.c

+21 −21
Original line number Diff line number Diff line
@@ -474,7 +474,7 @@ static int gen7_append_oa_reports(struct i915_perf_stream *stream, 
		 * copying it to userspace...

		 */

		if (report32[0] == 0) {

			DRM_ERROR("Skipping spurious, invalid OA report\n");

			DRM_NOTE("Skipping spurious, invalid OA report\n");

			continue;

		}
@@ -551,7 +551,7 @@ static int gen7_oa_read(struct i915_perf_stream *stream, 
		if (ret)

			return ret;



		DRM_ERROR("OA buffer overflow: force restart\n");

		DRM_DEBUG("OA buffer overflow: force restart\n");



		dev_priv->perf.oa.ops.oa_disable(dev_priv);

		dev_priv->perf.oa.ops.oa_enable(dev_priv);
@@ -1000,17 +1000,17 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream, 
	 * IDs

	 */

	if (!dev_priv->perf.metrics_kobj) {

		DRM_ERROR("OA metrics weren't advertised via sysfs\n");

		DRM_DEBUG("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");

		DRM_DEBUG("Only OA report sampling supported\n");

		return -EINVAL;

	}



	if (!dev_priv->perf.oa.ops.init_oa_buffer) {

		DRM_ERROR("OA unit not supported\n");

		DRM_DEBUG("OA unit not supported\n");

		return -ENODEV;

	}
@@ -1019,17 +1019,17 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream, 
	 * we currently only allow exclusive access

	 */

	if (dev_priv->perf.oa.exclusive_stream) {

		DRM_ERROR("OA unit already in use\n");

		DRM_DEBUG("OA unit already in use\n");

		return -EBUSY;

	}



	if (!props->metrics_set) {

		DRM_ERROR("OA metric set not specified\n");

		DRM_DEBUG("OA metric set not specified\n");

		return -EINVAL;

	}



	if (!props->oa_format) {

		DRM_ERROR("OA report format not specified\n");

		DRM_DEBUG("OA report format not specified\n");

		return -EINVAL;

	}
@@ -1385,7 +1385,7 @@ i915_perf_open_ioctl_locked(struct drm_i915_private *dev_priv, 
		if (IS_ERR(specific_ctx)) {

			ret = PTR_ERR(specific_ctx);

			if (ret != -EINTR)

				DRM_ERROR("Failed to look up context with ID %u for opening perf stream\n",

				DRM_DEBUG("Failed to look up context with ID %u for opening perf stream\n",

					  ctx_handle);

			goto err;

		}
@@ -1398,7 +1398,7 @@ i915_perf_open_ioctl_locked(struct drm_i915_private *dev_priv, 
	 */

	if (!specific_ctx &&

	    i915_perf_stream_paranoid && !capable(CAP_SYS_ADMIN)) {

		DRM_ERROR("Insufficient privileges to open system-wide i915 perf stream\n");

		DRM_DEBUG("Insufficient privileges to open system-wide i915 perf stream\n");

		ret = -EACCES;

		goto err_ctx;

	}
@@ -1477,7 +1477,7 @@ static int read_properties_unlocked(struct drm_i915_private *dev_priv, 
	memset(props, 0, sizeof(struct perf_open_properties));



	if (!n_props) {

		DRM_ERROR("No i915 perf properties given");

		DRM_DEBUG("No i915 perf properties given\n");

		return -EINVAL;

	}
@@ -1488,7 +1488,7 @@ static int read_properties_unlocked(struct drm_i915_private *dev_priv, 
	 * from userspace.

	 */

	if (n_props >= DRM_I915_PERF_PROP_MAX) {

		DRM_ERROR("More i915 perf properties specified than exist");

		DRM_DEBUG("More i915 perf properties specified than exist\n");

		return -EINVAL;

	}
@@ -1516,25 +1516,25 @@ static int read_properties_unlocked(struct drm_i915_private *dev_priv, 
		case DRM_I915_PERF_PROP_OA_METRICS_SET:

			if (value == 0 ||

			    value > dev_priv->perf.oa.n_builtin_sets) {

				DRM_ERROR("Unknown OA metric set ID");

				DRM_DEBUG("Unknown OA metric set ID\n");

				return -EINVAL;

			}

			props->metrics_set = value;

			break;

		case DRM_I915_PERF_PROP_OA_FORMAT:

			if (value == 0 || value >= I915_OA_FORMAT_MAX) {

				DRM_ERROR("Invalid OA report format\n");

				DRM_DEBUG("Invalid OA report format\n");

				return -EINVAL;

			}

			if (!dev_priv->perf.oa.oa_formats[value].size) {

				DRM_ERROR("Invalid OA report format\n");

				DRM_DEBUG("Invalid OA report format\n");

				return -EINVAL;

			}

			props->oa_format = value;

			break;

		case DRM_I915_PERF_PROP_OA_EXPONENT:

			if (value > OA_EXPONENT_MAX) {

				DRM_ERROR("OA timer exponent too high (> %u)\n",

				DRM_DEBUG("OA timer exponent too high (> %u)\n",

					 OA_EXPONENT_MAX);

				return -EINVAL;

			}
@@ -1566,7 +1566,7 @@ static int read_properties_unlocked(struct drm_i915_private *dev_priv, 


			if (oa_freq_hz > i915_oa_max_sample_rate &&

			    !capable(CAP_SYS_ADMIN)) {

				DRM_ERROR("OA exponent would exceed the max sampling frequency (sysctl dev.i915.oa_max_sample_rate) %uHz without root privileges\n",

				DRM_DEBUG("OA exponent would exceed the max sampling frequency (sysctl dev.i915.oa_max_sample_rate) %uHz without root privileges\n",

					  i915_oa_max_sample_rate);

				return -EACCES;

			}
@@ -1576,7 +1576,7 @@ static int read_properties_unlocked(struct drm_i915_private *dev_priv, 
			break;

		default:

			MISSING_CASE(id);

			DRM_ERROR("Unknown i915 perf property ID");

			DRM_DEBUG("Unknown i915 perf property ID\n");

			return -EINVAL;

		}
@@ -1596,7 +1596,7 @@ int i915_perf_open_ioctl(struct drm_device *dev, void *data, 
	int ret;



	if (!dev_priv->perf.initialized) {

		DRM_ERROR("i915 perf interface not available for this system");

		DRM_DEBUG("i915 perf interface not available for this system\n");

		return -ENOTSUPP;

	}
@@ -1604,7 +1604,7 @@ int i915_perf_open_ioctl(struct drm_device *dev, void *data, 
			   I915_PERF_FLAG_FD_NONBLOCK |

			   I915_PERF_FLAG_DISABLED;

	if (param->flags & ~known_open_flags) {

		DRM_ERROR("Unknown drm_i915_perf_open_param flag\n");

		DRM_DEBUG("Unknown drm_i915_perf_open_param flag\n");

		return -EINVAL;

	}

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