blk: Introduce IF_TYPE_VIRTIO

This adds a new block interface type for VirtIO block devices.

Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

disk/part.c

@@ -150,6 +150,9 @@ void dev_print (struct blk_desc *dev_desc)
 			dev_desc->revision,
 			dev_desc->product);
 		break;
+	case IF_TYPE_VIRTIO:
+		printf("%s VirtIO Block Device\n", dev_desc->vendor);
+		break;
 	case IF_TYPE_DOC:
 		puts("device type DOC\n");
 		return;
@@ -281,6 +284,9 @@ static void print_part_header(const char *type, struct blk_desc *dev_desc)
 	case IF_TYPE_NVME:
 		puts ("NVMe");
 		break;
+	case IF_TYPE_VIRTIO:
+		puts("VirtIO");
+		break;
 	default:
 		puts ("UNKNOWN");
 		break;

drivers/block/blk-uclass.c

@@ -23,6 +23,7 @@ static const char *if_typename_str[IF_TYPE_COUNT] = {
 	[IF_TYPE_HOST]		= "host",
 	[IF_TYPE_NVME]		= "nvme",
 	[IF_TYPE_EFI]		= "efi",
+	[IF_TYPE_VIRTIO]	= "virtio",
 };
 
 static enum uclass_id if_type_uclass_id[IF_TYPE_COUNT] = {
@@ -37,6 +38,7 @@ static enum uclass_id if_type_uclass_id[IF_TYPE_COUNT] = {
 	[IF_TYPE_HOST]		= UCLASS_ROOT,
 	[IF_TYPE_NVME]		= UCLASS_NVME,
 	[IF_TYPE_EFI]		= UCLASS_EFI,
+	[IF_TYPE_VIRTIO]	= UCLASS_VIRTIO,
 };
 
 static enum if_type if_typename_to_iftype(const char *if_typename)

include/blk.h

@@ -33,6 +33,7 @@ enum if_type {
 	IF_TYPE_HOST,
 	IF_TYPE_NVME,
 	IF_TYPE_EFI,
+	IF_TYPE_VIRTIO,
 
 	IF_TYPE_COUNT,			/* Number of interface types */
 };