[RESEND RFC PATCH 07/10] EFI: FMP: Add provision to update image's ImageTypeId in image descriptor

[Sughosh Ganu]

The FWU Multi Banks Update feature allows updating different types of
updatable firmware images on the platform. These image types are
identified using the ImageTypeId GUID value. Add support in the
GetImageInfo function of the FMP protocol to get the GUID values for
the individual images and populate these in the image descriptor for
the corresponding images.

Signed-off-by: Sughosh Ganu <sughosh.ganu at linaro.org>
---
 lib/efi_loader/efi_firmware.c | 76 ++++++++++++++++++++++++++++++++---
 1 file changed, 71 insertions(+), 5 deletions(-)

diff --git a/lib/efi_loader/efi_firmware.c b/lib/efi_loader/efi_firmware.c
index a1b88dbfc2..a2b639b448 100644
--- a/lib/efi_loader/efi_firmware.c
+++ b/lib/efi_loader/efi_firmware.c
@@ -10,6 +10,7 @@
 #include <charset.h>
 #include <dfu.h>
 #include <efi_loader.h>
+#include <fwu_metadata.h>
 #include <image.h>
 #include <signatures.h>
 
@@ -106,7 +107,8 @@ efi_status_t EFIAPI efi_firmware_set_package_info_unsupported(
  * @descriptor_size:		Pointer to descriptor size
  * package_version:		Package version
  * package_version_name:	Package version's name
- * image_type:			Image type GUID
+ * guid_array:			Image type GUID array
+ * nparts:			Number of partions on the storage device
  *
  * Return information bout the current firmware image in @image_info.
  * @image_info will consist of a number of descriptors.
@@ -122,7 +124,7 @@ static efi_status_t efi_get_dfu_info(
 	efi_uintn_t *descriptor_size,
 	u32 *package_version,
 	u16 **package_version_name,
-	const efi_guid_t *image_type)
+	const efi_guid_t *guid_array, u32 nparts)
 {
 	struct dfu_entity *dfu;
 	size_t names_len, total_size;
@@ -145,6 +147,19 @@ static efi_status_t efi_get_dfu_info(
 		return EFI_SUCCESS;
 	}
 
+	if (IS_ENABLED(CONFIG_FWU_MULTI_BANK_UPDATE)) {
+		/*
+		 * For FWU multi bank updates, the number of partitions
+		 * should at least be same as dfu partitions or less
+		 */
+		if (nparts > dfu_num) {
+			log_err("Number of dfu alt no's less than partitions\n");
+			dfu_free_entities();
+
+			return EFI_INVALID_PARAMETER;
+		}
+	}
+
 	total_size = sizeof(*image_info) * dfu_num + names_len;
 	/*
 	 * we will assume that sizeof(*image_info) * dfu_name
@@ -172,7 +187,11 @@ static efi_status_t efi_get_dfu_info(
 	next = name;
 	list_for_each_entry(dfu, &dfu_list, list) {
 		image_info[i].image_index = dfu->alt + 1;
-		image_info[i].image_type_id = *image_type;
+		if (IS_ENABLED(CONFIG_FWU_MULTI_BANK_UPDATE))
+			image_info[i].image_type_id = guid_array[i];
+		else
+			image_info[i].image_type_id = *guid_array;
+
 		image_info[i].image_id = dfu->alt;
 
 		/* copy the DFU entity name */
@@ -249,7 +268,9 @@ efi_status_t EFIAPI efi_firmware_fit_get_image_info(
 	u32 *package_version,
 	u16 **package_version_name)
 {
+	u32 nparts;
 	efi_status_t ret;
+	efi_guid_t *part_guid_arr;
 
 	EFI_ENTRY("%p %p %p %p %p %p %p %p\n", this,
 		  image_info_size, image_info,
@@ -264,12 +285,24 @@ efi_status_t EFIAPI efi_firmware_fit_get_image_info(
 	     !descriptor_size || !package_version || !package_version_name))
 		return EFI_EXIT(EFI_INVALID_PARAMETER);
 
+	part_guid_arr = malloc(sizeof(efi_guid_t));
+	if (!part_guid_arr) {
+		log_err("Unable to allocate memory for guid array\n");
+		ret = EFI_OUT_OF_RESOURCES;
+		goto out;
+	}
+
+	guidcpy(part_guid_arr, &efi_firmware_image_type_uboot_fit);
+	nparts = 1;
+
 	ret = efi_get_dfu_info(image_info_size, image_info,
 			       descriptor_version, descriptor_count,
 			       descriptor_size,
 			       package_version, package_version_name,
-			       &efi_firmware_image_type_uboot_fit);
+			       part_guid_arr, nparts);
 
+out:
+	free(part_guid_arr);
 	return EFI_EXIT(ret);
 }
 
@@ -358,7 +391,10 @@ efi_status_t EFIAPI efi_firmware_raw_get_image_info(
 	u32 *package_version,
 	u16 **package_version_name)
 {
+	u32 nparts;
+	int status;
 	efi_status_t ret = EFI_SUCCESS;
+	efi_guid_t *part_guid_arr;
 
 	EFI_ENTRY("%p %p %p %p %p %p %p %p\n", this,
 		  image_info_size, image_info,
@@ -373,12 +409,42 @@ efi_status_t EFIAPI efi_firmware_raw_get_image_info(
 	     !descriptor_size || !package_version || !package_version_name))
 		return EFI_EXIT(EFI_INVALID_PARAMETER);
 
+	if (IS_ENABLED(CONFIG_FWU_MULTI_BANK_UPDATE)) {
+		/*
+		 * Read the ImageType GUID values. Populate the guid array
+		 * with thesevalues. These are the values to be used in the
+		 * capsule for ImageTypeId.
+		 */
+		status = fwu_fill_partition_guid_array(&part_guid_arr,
+						       &nparts);
+		if (status < 0) {
+			log_err("Unable to get partiion guid's\n");
+			if (status == -EIO)
+				ret = EFI_DEVICE_ERROR;
+			else if (status == -ENOMEM)
+				ret = EFI_OUT_OF_RESOURCES;
+			goto out;
+		}
+	} else {
+		part_guid_arr = malloc(sizeof(efi_guid_t));
+		if (!part_guid_arr) {
+			log_err("Unable to allocate memory for guid array\n");
+			ret = EFI_OUT_OF_RESOURCES;
+			goto out;
+		}
+
+		guidcpy(part_guid_arr, &efi_firmware_image_type_uboot_raw);
+		nparts = 1;
+	}
+
 	ret = efi_get_dfu_info(image_info_size, image_info,
 			       descriptor_version, descriptor_count,
 			       descriptor_size,
 			       package_version, package_version_name,
-			       &efi_firmware_image_type_uboot_raw);
+			       part_guid_arr, nparts);
 
+out:
+	free(part_guid_arr);
 	return EFI_EXIT(ret);
 }
 
-- 
2.17.1