1 files changed, 93 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_observation.c b/drivers/gpu/drm/xe/xe_observation.c
new file mode 100644
index 000000000000..fcb584b42a7d
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_observation.c
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2023-2024 Intel Corporation
+ */
+
+#include <linux/errno.h>
+#include <linux/sysctl.h>
+
+#include <drm/xe_drm.h>
+
+#include "xe_oa.h"
+#include "xe_observation.h"
+
+u32 xe_observation_paranoid = true;
+static struct ctl_table_header *sysctl_header;
+
+static int xe_oa_ioctl(struct drm_device *dev, struct drm_xe_observation_param *arg,
+		       struct drm_file *file)
+{
+	switch (arg->observation_op) {
+	case DRM_XE_OBSERVATION_OP_STREAM_OPEN:
+		return xe_oa_stream_open_ioctl(dev, arg->param, file);
+	case DRM_XE_OBSERVATION_OP_ADD_CONFIG:
+		return xe_oa_add_config_ioctl(dev, arg->param, file);
+	case DRM_XE_OBSERVATION_OP_REMOVE_CONFIG:
+		return xe_oa_remove_config_ioctl(dev, arg->param, file);
+	default:
+		return -EINVAL;
+	}
+}
+
+/**
+ * xe_observation_ioctl - The top level observation layer ioctl
+ * @dev: @drm_device
+ * @data: pointer to struct @drm_xe_observation_param
+ * @file: @drm_file
+ *
+ * The function is called for different observation streams types and
+ * allows execution of different operations supported by those stream
+ * types.
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int xe_observation_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
+{
+	struct drm_xe_observation_param *arg = data;
+
+	if (arg->extensions)
+		return -EINVAL;
+
+	switch (arg->observation_type) {
+	case DRM_XE_OBSERVATION_TYPE_OA:
+		return xe_oa_ioctl(dev, arg, file);
+	default:
+		return -EINVAL;
+	}
+}
+
+static struct ctl_table observation_ctl_table[] = {
+	{
+	 .procname = "observation_paranoid",
+	 .data = &xe_observation_paranoid,
+	 .maxlen = sizeof(xe_observation_paranoid),
+	 .mode = 0644,
+	 .proc_handler = proc_dointvec_minmax,
+	 .extra1 = SYSCTL_ZERO,
+	 .extra2 = SYSCTL_ONE,
+	 },
+	{}
+};
+
+/**
+ * xe_observation_sysctl_register - Register xe_observation_paranoid sysctl
+ *
+ * Normally only superuser/root can access observation stream
+ * data. However, superuser can set xe_observation_paranoid sysctl to 0 to
+ * allow non-privileged users to also access observation data.
+ *
+ * Return: always returns 0
+ */
+int xe_observation_sysctl_register(void)
+{
+	sysctl_header = register_sysctl("dev/xe", observation_ctl_table);
+	return 0;
+}
+
+/**
+ * xe_observation_sysctl_unregister - Unregister xe_observation_paranoid sysctl
+ */
+void xe_observation_sysctl_unregister(void)
+{
+	unregister_sysctl_table(sysctl_header);
+}