Merge patch series "FWU: Add support for FWU metadata version 2"

Sughosh Ganu <[email protected]> says:

The following patch series adds support for version 2 of the FWU
metadata. The version 2 metadata structure is defined in the latest
revision of the FWU specification [1].

The earlier versions of these patches were migrating to a version 2
only support in U-Boot, similar to TF-A. However, based on feedback
from ST [2], this series has been updated to support both versions. A
platform would still be needed to enable one of the two versions of
metadata through a config symbol.

TF-A has code which reads the FWU metadata and boots the platform from
the active partition. TF-A has decided to migrate the FWU code to a
version 2 only support. These changes have been merged in upstream
TF-A.

These changes have been tested on the ST DK2 board, which uses the GPT
based partitioning scheme. Both V1 and V2 metadata versions have been
tested on the DK2 board.

These changes need to be tested on platforms with MTD partitioned
storage devices.

1 files changed, 65 insertions, 6 deletions

diff --git a/include/fwu_mdata.h b/include/fwu_mdata.h
index 56189e2f40a..d2521f39b42 100644
--- a/include/fwu_mdata.h
+++ b/include/fwu_mdata.h
@@ -11,7 +11,7 @@
 
 /**
  * struct fwu_image_bank_info - firmware image information
- * @image_uuid: Guid value of the image in this bank
+ * @image_guid: Guid value of the image in this bank
  * @accepted: Acceptance status of the image
  * @reserved: Reserved
  *
@@ -20,15 +20,15 @@
  * acceptance status
  */
 struct fwu_image_bank_info {
-	efi_guid_t  image_uuid;
+	efi_guid_t  image_guid;
 	uint32_t accepted;
 	uint32_t reserved;
 } __packed;
 
 /**
  * struct fwu_image_entry - information for a particular type of image
- * @image_type_uuid: Guid value for identifying the image type
- * @location_uuid: Guid of the storage volume where the image is located
+ * @image_type_guid: Guid value for identifying the image type
+ * @location_guid: Guid of the storage volume where the image is located
  * @img_bank_info: Array containing properties of images
  *
  * This structure contains information on various types of updatable
@@ -36,12 +36,36 @@ struct fwu_image_bank_info {
  * information per bank.
  */
 struct fwu_image_entry {
-	efi_guid_t image_type_uuid;
-	efi_guid_t location_uuid;
+	efi_guid_t image_type_guid;
+	efi_guid_t location_guid;
 	struct fwu_image_bank_info img_bank_info[CONFIG_FWU_NUM_BANKS];
 } __packed;
 
 /**
+ * struct fwu_fw_store_desc - FWU updatable image information
+ * @num_banks: Number of firmware banks
+ * @num_images: Number of images per bank
+ * @img_entry_size: The size of the img_entry array
+ * @bank_info_entry_size: The size of the img_bank_info array
+ * @img_entry: Array of image entries each giving information on a image
+ *
+ * This image descriptor structure contains information on the number of
+ * updatable banks and images per bank. It also gives the total sizes of
+ * the fwu_image_entry and fwu_image_bank_info arrays. This structure is
+ * only present in version 2 of the metadata structure.
+ */
+struct fwu_fw_store_desc {
+	uint8_t  num_banks;
+	uint8_t  reserved;
+	uint16_t num_images;
+	uint16_t img_entry_size;
+	uint16_t bank_info_entry_size;
+
+	struct fwu_image_entry img_entry[CONFIG_FWU_NUM_IMAGES_PER_BANK];
+} __packed;
+
+#if defined(CONFIG_FWU_MDATA_V1)
+/**
  * struct fwu_mdata - FWU metadata structure for multi-bank updates
  * @crc32: crc32 value for the FWU metadata
  * @version: FWU metadata version
@@ -65,4 +89,39 @@ struct fwu_mdata {
 	struct fwu_image_entry img_entry[CONFIG_FWU_NUM_IMAGES_PER_BANK];
 } __packed;
 
+#else /* CONFIG_FWU_MDATA_V1 */
+/**
+ * struct fwu_mdata - FWU metadata structure for multi-bank updates
+ * @crc32: crc32 value for the FWU metadata
+ * @version: FWU metadata version
+ * @active_index: Index of the bank currently used for booting images
+ * @previous_active_inde: Index of the bank used before the current bank
+ *                        being used for booting
+ * @metadata_size: Size of the entire metadata structure, including the
+ *                 image descriptors
+ * @desc_offset: The offset from the start of this structure where the
+ *               image descriptor structure starts. 0 if absent
+ * @bank_state: State of each bank, valid, invalid or accepted
+ * @fw_desc: The structure describing the FWU updatable images
+ *
+ * This is the top level structure used to store all information for performing
+ * multi bank updates on the platform. This contains info on the bank being
+ * used to boot along with the information on state of individual banks.
+ */
+struct fwu_mdata {
+	uint32_t crc32;
+	uint32_t version;
+	uint32_t active_index;
+	uint32_t previous_active_index;
+	uint32_t metadata_size;
+	uint16_t desc_offset;
+	uint16_t reserved1;
+	uint8_t  bank_state[4];
+	uint32_t reserved2;
+
+	// struct fwu_fw_store_desc fw_desc;
+} __packed;
+
+#endif /* CONFIG_FWU_MDATA_V1 */
+
 #endif /* _FWU_MDATA_H_ */