From dd17e5efb9ef765617fcc84923dc569a3d57726d Mon Sep 17 00:00:00 2001
From: Zhi Wang <zhi.wang.linux@gmail.com>
Date: Tue, 22 Feb 2022 10:05:32 -0500
Subject: drm/i915/gvt: add the missing mdev attribute "name"
Git-commit: 43d26c4fc6c446d766253d546f0083d78023d34a
Patch-mainline: v5.18-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

The mdev attribute "name" is required by some middle software, e.g.
KubeVirt, an open source SW that manages VM on Kubernetes cluster uses
the mdev sysfs directory/file structure to discover mediated device in
nodes in the cluster.

v2:

- Fix the missing defination in gvt_type_attrs. (Zhenyu)

Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Hui Chun Ong <hui.chun.ong@intel.com>
Cc: Terrence Xu <terrence.xu@intel.com>
Cc: Zhi Wang <zhi.a.wang@intel.com>
Signed-off-by: Zhi Wang <zhi.wang.linux@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220222150532.9090-1-zhi.a.wang@intel.com
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/i915/gvt/kvmgt.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index e8d6c76e9234..057ec4490104 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -188,14 +188,29 @@ static ssize_t description_show(struct mdev_type *mtype,
 		       type->weight);
 }
 
+static ssize_t name_show(struct mdev_type *mtype,
+			 struct mdev_type_attribute *attr, char *buf)
+{
+	struct intel_vgpu_type *type;
+	struct intel_gvt *gvt = kdev_to_i915(mtype_get_parent_dev(mtype))->gvt;
+
+	type = &gvt->types[mtype_get_type_group_id(mtype)];
+	if (!type)
+		return 0;
+
+	return sprintf(buf, "%s\n", type->name);
+}
+
 static MDEV_TYPE_ATTR_RO(available_instances);
 static MDEV_TYPE_ATTR_RO(device_api);
 static MDEV_TYPE_ATTR_RO(description);
+static MDEV_TYPE_ATTR_RO(name);
 
 static struct attribute *gvt_type_attrs[] = {
 	&mdev_type_attr_available_instances.attr,
 	&mdev_type_attr_device_api.attr,
 	&mdev_type_attr_description.attr,
+	&mdev_type_attr_name.attr,
 	NULL,
 };
 
-- 
2.38.1