1 files changed, 124 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_log_debugfs.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_log_debugfs.c
new file mode 100644
index 000000000000..129e0cf7dfe2
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_log_debugfs.c
@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#include <linux/fs.h>
+#include <drm/drm_print.h>
+
+#include "gt/debugfs_gt.h"
+#include "intel_guc.h"
+#include "intel_guc_log.h"
+#include "intel_guc_log_debugfs.h"
+
+static int guc_log_dump_show(struct seq_file *m, void *data)
+{
+	struct drm_printer p = drm_seq_file_printer(m);
+
+	return intel_guc_log_dump(m->private, &p, false);
+}
+DEFINE_GT_DEBUGFS_ATTRIBUTE(guc_log_dump);
+
+static int guc_load_err_log_dump_show(struct seq_file *m, void *data)
+{
+	struct drm_printer p = drm_seq_file_printer(m);
+
+	return intel_guc_log_dump(m->private, &p, true);
+}
+DEFINE_GT_DEBUGFS_ATTRIBUTE(guc_load_err_log_dump);
+
+static int guc_log_level_get(void *data, u64 *val)
+{
+	struct intel_guc_log *log = data;
+
+	if (!intel_guc_is_used(log_to_guc(log)))
+		return -ENODEV;
+
+	*val = intel_guc_log_get_level(log);
+
+	return 0;
+}
+
+static int guc_log_level_set(void *data, u64 val)
+{
+	struct intel_guc_log *log = data;
+
+	if (!intel_guc_is_used(log_to_guc(log)))
+		return -ENODEV;
+
+	return intel_guc_log_set_level(log, val);
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(guc_log_level_fops,
+			guc_log_level_get, guc_log_level_set,
+			"%lld\n");
+
+static int guc_log_relay_open(struct inode *inode, struct file *file)
+{
+	struct intel_guc_log *log = inode->i_private;
+
+	if (!intel_guc_is_ready(log_to_guc(log)))
+		return -ENODEV;
+
+	file->private_data = log;
+
+	return intel_guc_log_relay_open(log);
+}
+
+static ssize_t
+guc_log_relay_write(struct file *filp,
+		    const char __user *ubuf,
+		    size_t cnt,
+		    loff_t *ppos)
+{
+	struct intel_guc_log *log = filp->private_data;
+	int val;
+	int ret;
+
+	ret = kstrtoint_from_user(ubuf, cnt, 0, &val);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * Enable and start the guc log relay on value of 1.
+	 * Flush log relay for any other value.
+	 */
+	if (val == 1)
+		ret = intel_guc_log_relay_start(log);
+	else
+		intel_guc_log_relay_flush(log);
+
+	return ret ?: cnt;
+}
+
+static int guc_log_relay_release(struct inode *inode, struct file *file)
+{
+	struct intel_guc_log *log = inode->i_private;
+
+	intel_guc_log_relay_close(log);
+	return 0;
+}
+
+static const struct file_operations guc_log_relay_fops = {
+	.owner = THIS_MODULE,
+	.open = guc_log_relay_open,
+	.write = guc_log_relay_write,
+	.release = guc_log_relay_release,
+};
+
+void intel_guc_log_debugfs_register(struct intel_guc_log *log,
+				    struct dentry *root)
+{
+	static const struct debugfs_gt_file files[] = {
+		{ "guc_log_dump", &guc_log_dump_fops, NULL },
+		{ "guc_load_err_log_dump", &guc_load_err_log_dump_fops, NULL },
+		{ "guc_log_level", &guc_log_level_fops, NULL },
+		{ "guc_log_relay", &guc_log_relay_fops, NULL },
+	};
+
+	if (!intel_guc_is_supported(log_to_guc(log)))
+		return;
+
+	intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), log);
+}
+