accel/ivpu: Initial debugfs support

Add initial debugfs support. Provide below functionality:

- print buffer objects
- print latest boot mode
- trigger vpu engine reset

Signed-off-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Reviewed-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230524074847.866711-2-stanislaw.gruszka@linux.intel.com

1 files changed, 74 insertions, 0 deletions

diff --git a/drivers/accel/ivpu/ivpu_debugfs.c b/drivers/accel/ivpu/ivpu_debugfs.c
new file mode 100644
index 000000000000..df51ec008fb5
--- /dev/null
+++ b/drivers/accel/ivpu/ivpu_debugfs.c
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020-2023 Intel Corporation
+ */
+
+#include <drm/drm_debugfs.h>
+#include <drm/drm_file.h>
+#include <drm/drm_print.h>
+
+#include <uapi/drm/ivpu_accel.h>
+
+#include "ivpu_debugfs.h"
+#include "ivpu_drv.h"
+#include "ivpu_gem.h"
+#include "ivpu_jsm_msg.h"
+#include "ivpu_pm.h"
+
+static int bo_list_show(struct seq_file *s, void *v)
+{
+	struct drm_info_node *node = (struct drm_info_node *)s->private;
+	struct drm_printer p = drm_seq_file_printer(s);
+
+	ivpu_bo_list(node->minor->dev, &p);
+
+	return 0;
+}
+
+static int last_bootmode_show(struct seq_file *s, void *v)
+{
+	struct drm_info_node *node = (struct drm_info_node *)s->private;
+	struct ivpu_device *vdev = to_ivpu_device(node->minor->dev);
+
+	seq_printf(s, "%s\n", (vdev->pm->is_warmboot) ? "warmboot" : "coldboot");
+
+	return 0;
+}
+
+static const struct drm_info_list vdev_debugfs_list[] = {
+	{"bo_list", bo_list_show, 0},
+	{"last_bootmode", last_bootmode_show, 0},
+};
+
+static ssize_t
+ivpu_reset_engine_fn(struct file *file, const char __user *user_buf, size_t size, loff_t *pos)
+{
+	struct ivpu_device *vdev = file->private_data;
+
+	if (!size)
+		return -EINVAL;
+
+	if (ivpu_jsm_reset_engine(vdev, DRM_IVPU_ENGINE_COMPUTE))
+		return -ENODEV;
+	if (ivpu_jsm_reset_engine(vdev, DRM_IVPU_ENGINE_COPY))
+		return -ENODEV;
+
+	return size;
+}
+
+static const struct file_operations ivpu_reset_engine_fops = {
+	.owner = THIS_MODULE,
+	.open = simple_open,
+	.write = ivpu_reset_engine_fn,
+};
+
+void ivpu_debugfs_init(struct drm_minor *minor)
+{
+	struct ivpu_device *vdev = to_ivpu_device(minor->dev);
+
+	drm_debugfs_create_files(vdev_debugfs_list, ARRAY_SIZE(vdev_debugfs_list),
+				 minor->debugfs_root, minor);
+
+	debugfs_create_file("reset_engine", 0200, minor->debugfs_root, vdev,
+			    &ivpu_reset_engine_fops);
+}