From: Heinrich Schuchardt <xypron.glpk@gmx.de>
Date: Fri, 4 Dec 2020 02:02:03 +0000 (+0100)
Subject: efi_loader: resequence functions in efi_boottime.c
X-Git-Url: http://git.dujemihanovic.xyz/%22http:/www.sics.se/static/git-logo.png?a=commitdiff_plain;h=0e9d2d7bc25bd3114e8f6ff0d18cdf9ee675909c;p=u-boot.git

efi_loader: resequence functions in efi_boottime.c

For implementing support for the EFI_LOAD_FILE_PROTOCOL in the LoadImage()
service we will have to call the LocateDevicePath() service. To avoid a
forward declaration resequence the functions.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
---

diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index 246b59d3b3..4f7479d4df 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -1769,6 +1769,88 @@ failure:
 	return ret;
 }
 
+/**
+ * efi_locate_device_path() - Get the device path and handle of an device
+ *                            implementing a protocol
+ * @protocol:    GUID of the protocol
+ * @device_path: device path
+ * @device:      handle of the device
+ *
+ * This function implements the LocateDevicePath service.
+ *
+ * See the Unified Extensible Firmware Interface (UEFI) specification for
+ * details.
+ *
+ * Return: status code
+ */
+static efi_status_t EFIAPI efi_locate_device_path(
+			const efi_guid_t *protocol,
+			struct efi_device_path **device_path,
+			efi_handle_t *device)
+{
+	struct efi_device_path *dp;
+	size_t i;
+	struct efi_handler *handler;
+	efi_handle_t *handles;
+	size_t len, len_dp;
+	size_t len_best = 0;
+	efi_uintn_t no_handles;
+	u8 *remainder;
+	efi_status_t ret;
+
+	EFI_ENTRY("%pUl, %p, %p", protocol, device_path, device);
+
+	if (!protocol || !device_path || !*device_path) {
+		ret = EFI_INVALID_PARAMETER;
+		goto out;
+	}
+
+	/* Find end of device path */
+	len = efi_dp_instance_size(*device_path);
+
+	/* Get all handles implementing the protocol */
+	ret = EFI_CALL(efi_locate_handle_buffer(BY_PROTOCOL, protocol, NULL,
+						&no_handles, &handles));
+	if (ret != EFI_SUCCESS)
+		goto out;
+
+	for (i = 0; i < no_handles; ++i) {
+		/* Find the device path protocol */
+		ret = efi_search_protocol(handles[i], &efi_guid_device_path,
+					  &handler);
+		if (ret != EFI_SUCCESS)
+			continue;
+		dp = (struct efi_device_path *)handler->protocol_interface;
+		len_dp = efi_dp_instance_size(dp);
+		/*
+		 * This handle can only be a better fit
+		 * if its device path length is longer than the best fit and
+		 * if its device path length is shorter of equal the searched
+		 * device path.
+		 */
+		if (len_dp <= len_best || len_dp > len)
+			continue;
+		/* Check if dp is a subpath of device_path */
+		if (memcmp(*device_path, dp, len_dp))
+			continue;
+		if (!device) {
+			ret = EFI_INVALID_PARAMETER;
+			goto out;
+		}
+		*device = handles[i];
+		len_best = len_dp;
+	}
+	if (len_best) {
+		remainder = (u8 *)*device_path + len_best;
+		*device_path = (struct efi_device_path *)remainder;
+		ret = EFI_SUCCESS;
+	} else {
+		ret = EFI_NOT_FOUND;
+	}
+out:
+	return EFI_EXIT(ret);
+}
+
 /**
  * efi_load_image_from_path() - load an image using a file path
  *
@@ -2403,88 +2485,6 @@ found:
 	return EFI_EXIT(EFI_SUCCESS);
 }
 
-/**
- * efi_locate_device_path() - Get the device path and handle of an device
- *                            implementing a protocol
- * @protocol:    GUID of the protocol
- * @device_path: device path
- * @device:      handle of the device
- *
- * This function implements the LocateDevicePath service.
- *
- * See the Unified Extensible Firmware Interface (UEFI) specification for
- * details.
- *
- * Return: status code
- */
-static efi_status_t EFIAPI efi_locate_device_path(
-			const efi_guid_t *protocol,
-			struct efi_device_path **device_path,
-			efi_handle_t *device)
-{
-	struct efi_device_path *dp;
-	size_t i;
-	struct efi_handler *handler;
-	efi_handle_t *handles;
-	size_t len, len_dp;
-	size_t len_best = 0;
-	efi_uintn_t no_handles;
-	u8 *remainder;
-	efi_status_t ret;
-
-	EFI_ENTRY("%pUl, %p, %p", protocol, device_path, device);
-
-	if (!protocol || !device_path || !*device_path) {
-		ret = EFI_INVALID_PARAMETER;
-		goto out;
-	}
-
-	/* Find end of device path */
-	len = efi_dp_instance_size(*device_path);
-
-	/* Get all handles implementing the protocol */
-	ret = EFI_CALL(efi_locate_handle_buffer(BY_PROTOCOL, protocol, NULL,
-						&no_handles, &handles));
-	if (ret != EFI_SUCCESS)
-		goto out;
-
-	for (i = 0; i < no_handles; ++i) {
-		/* Find the device path protocol */
-		ret = efi_search_protocol(handles[i], &efi_guid_device_path,
-					  &handler);
-		if (ret != EFI_SUCCESS)
-			continue;
-		dp = (struct efi_device_path *)handler->protocol_interface;
-		len_dp = efi_dp_instance_size(dp);
-		/*
-		 * This handle can only be a better fit
-		 * if its device path length is longer than the best fit and
-		 * if its device path length is shorter of equal the searched
-		 * device path.
-		 */
-		if (len_dp <= len_best || len_dp > len)
-			continue;
-		/* Check if dp is a subpath of device_path */
-		if (memcmp(*device_path, dp, len_dp))
-			continue;
-		if (!device) {
-			ret = EFI_INVALID_PARAMETER;
-			goto out;
-		}
-		*device = handles[i];
-		len_best = len_dp;
-	}
-	if (len_best) {
-		remainder = (u8 *)*device_path + len_best;
-		*device_path = (struct efi_device_path *)remainder;
-		ret = EFI_SUCCESS;
-	} else {
-		ret = EFI_NOT_FOUND;
-	}
-out:
-	return EFI_EXIT(ret);
-}
-
 /**
  * efi_install_multiple_protocol_interfaces() - Install multiple protocol
  *                                              interfaces