[resent RFC 20/22] efi_driver: align with efi_disk-dm integration

[AKASHI Takahiro]

Signed-off-by: AKASHI Takahiro <takahiro.akashi at linaro.org>
---
 lib/efi_driver/efi_block_device.c |  6 ++++++
 lib/efi_loader/efi_device_path.c  | 29 +++++++++++++++++++++++++++++
 lib/efi_loader/efi_disk.c         | 12 +++++++++++-
 3 files changed, 46 insertions(+), 1 deletion(-)

diff --git a/lib/efi_driver/efi_block_device.c b/lib/efi_driver/efi_block_device.c
index 0937e3595a43..b6afa939e1d1 100644
--- a/lib/efi_driver/efi_block_device.c
+++ b/lib/efi_driver/efi_block_device.c
@@ -173,6 +173,12 @@ static int efi_bl_bind(efi_handle_t handle, void *interface)
 	plat->handle = handle;
 	plat->io = interface;
 
+	/*
+	 * FIXME: necessary because we won't do almost nothing in
+	 * efi_disk_create() when called from device_probe().
+	 */
+	bdev->efi_obj = handle;
+
 	ret = device_probe(bdev);
 	if (ret)
 		return ret;
diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c
index cbdb466da41c..36c77bce9a05 100644
--- a/lib/efi_loader/efi_device_path.c
+++ b/lib/efi_loader/efi_device_path.c
@@ -628,6 +628,35 @@ __maybe_unused static void *dp_fill(void *buf, struct udevice *dev)
 			return &dp->vendor_data[1];
 			}
 #endif
+#ifdef CONFIG_EFI_LOADER
+		/*
+		 * FIXME: conflicting with CONFIG_SANDBOX
+		 * This case is necessary to support efi_disk's created by
+		 * efi_driver (and efi_driver_binding_protocol).
+		 * TODO:
+		 * The best way to work around here is to create efi_root as
+		 * udevice and put all efi_driver objects under it.
+		 */
+		case UCLASS_ROOT: {
+			struct efi_device_path_vendor *dp;
+			struct blk_desc *desc = dev_get_uclass_plat(dev);
+			/* FIXME: guid_vendor used in selftest_block_device */
+			static efi_guid_t guid_vendor =
+				EFI_GUID(0xdbca4c98, 0x6cb0, 0x694d,
+				0x08, 0x72, 0x81, 0x9c, 0x65, 0x0c, 0xb7, 0xb8);
+
+
+			dp_fill(buf, dev->parent);
+			dp = buf;
+			++dp;
+			dp->dp.type = DEVICE_PATH_TYPE_HARDWARE_DEVICE;
+			dp->dp.sub_type = DEVICE_PATH_SUB_TYPE_VENDOR;
+			dp->dp.length = sizeof(*dp) + 1;
+			memcpy(&dp->guid, &guid_vendor, sizeof(efi_guid_t));
+			dp->vendor_data[0] = desc->devnum;
+			return &dp->vendor_data[1];
+			}
+#endif
 #ifdef CONFIG_VIRTIO_BLK
 		case UCLASS_VIRTIO: {
 			struct efi_device_path_vendor *dp;
diff --git a/lib/efi_loader/efi_disk.c b/lib/efi_loader/efi_disk.c
index dfd06dd31e4a..e7cf1567929b 100644
--- a/lib/efi_loader/efi_disk.c
+++ b/lib/efi_loader/efi_disk.c
@@ -562,11 +562,21 @@ static int efi_disk_create_part(struct udevice *dev)
 int efi_disk_create(struct udevice *dev)
 {
 	enum uclass_id id;
+	struct blk_desc *desc;
 
 	id = device_get_uclass_id(dev);
 
-	if (id == UCLASS_BLK)
+	if (id == UCLASS_BLK) {
+		/*
+		 * avoid creating duplicated objects now that efi_driver
+		 * has already created an efi_disk at this moment.
+		 */
+		desc = dev_get_uclass_plat(dev);
+		if (desc->if_type == IF_TYPE_EFI)
+			return 0;
+
 		return efi_disk_create_raw(dev);
+	}
 
 	if (id == UCLASS_PARTITION)
 		return efi_disk_create_part(dev);
-- 
2.33.0