1 files changed, 104 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_debugfs.c b/drivers/gpu/drm/i915/gt/intel_gt_debugfs.c
new file mode 100644
index 000000000000..f103664b71d4
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/intel_gt_debugfs.c
@@ -0,0 +1,104 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#include <linux/debugfs.h>
+
+#include "i915_drv.h"
+#include "intel_gt_debugfs.h"
+#include "intel_gt_engines_debugfs.h"
+#include "intel_gt_pm_debugfs.h"
+#include "intel_sseu_debugfs.h"
+#include "pxp/intel_pxp_debugfs.h"
+#include "uc/intel_uc_debugfs.h"
+
+int intel_gt_debugfs_reset_show(struct intel_gt *gt, u64 *val)
+{
+	int ret = intel_gt_terminally_wedged(gt);
+
+	switch (ret) {
+	case -EIO:
+		*val = 1;
+		return 0;
+	case 0:
+		*val = 0;
+		return 0;
+	default:
+		return ret;
+	}
+}
+
+int intel_gt_debugfs_reset_store(struct intel_gt *gt, u64 val)
+{
+	/* Flush any previous reset before applying for a new one */
+	wait_event(gt->reset.queue,
+		   !test_bit(I915_RESET_BACKOFF, &gt->reset.flags));
+
+	intel_gt_handle_error(gt, val, I915_ERROR_CAPTURE,
+			      "Manually reset engine mask to %llx", val);
+	return 0;
+}
+
+/*
+ * keep the interface clean where the first parameter
+ * is a 'struct intel_gt *' instead of 'void *'
+ */
+static int __intel_gt_debugfs_reset_show(void *data, u64 *val)
+{
+	return intel_gt_debugfs_reset_show(data, val);
+}
+
+static int __intel_gt_debugfs_reset_store(void *data, u64 val)
+{
+	return intel_gt_debugfs_reset_store(data, val);
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(reset_fops, __intel_gt_debugfs_reset_show,
+			__intel_gt_debugfs_reset_store, "%llu\n");
+
+static void gt_debugfs_register(struct intel_gt *gt, struct dentry *root)
+{
+	static const struct intel_gt_debugfs_file files[] = {
+		{ "reset", &reset_fops, NULL },
+	};
+
+	intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), gt);
+}
+
+void intel_gt_debugfs_register(struct intel_gt *gt)
+{
+	struct dentry *root;
+
+	if (!gt->i915->drm.primary->debugfs_root)
+		return;
+
+	root = debugfs_create_dir("gt", gt->i915->drm.primary->debugfs_root);
+	if (IS_ERR(root))
+		return;
+
+	gt_debugfs_register(gt, root);
+
+	intel_gt_engines_debugfs_register(gt, root);
+	intel_gt_pm_debugfs_register(gt, root);
+	intel_sseu_debugfs_register(gt, root);
+
+	intel_uc_debugfs_register(&gt->uc, root);
+	intel_pxp_debugfs_register(&gt->pxp, root);
+}
+
+void intel_gt_debugfs_register_files(struct dentry *root,
+				     const struct intel_gt_debugfs_file *files,
+				     unsigned long count, void *data)
+{
+	while (count--) {
+		umode_t mode = files->fops->write ? 0644 : 0444;
+
+		if (!files->eval || files->eval(data))
+			debugfs_create_file(files->name,
+					    mode, root, data,
+					    files->fops);
+
+		files++;
+	}
+}