capsule: FMP: Populate the image descriptor array from platform data

Currently, the image descriptor array that has been passed to the
GetImageInfo function of the Firmware Management Protocol(FMP) gets
populated through the data stored with the dfu framework. The
dfu data is not restricted to contain information only of the images
updatable through the capsule update mechanism, but it also contains
information on other images. The image descriptor array is also parsed
by the ESRT generation code, and thus the ESRT table contains entries
for other images that are not being handled by the FMP for the capsule
updates. Fix this by populating the image descriptor array from the
structure initialised in the board file.

The other issue fixed is assignment of a separate GUID for all images
in the image descriptor array. The UEFI specification mandates that
all entries in the ESRT table should have a unique GUID value as part
of the FwClass member of the EFI_SYSTEM_RESOURCE_ENTRY. Currently, all
images are assigned a single GUID value, either an FIT GUID or a raw
image GUID. This is fixed by obtaining the GUID values from the
efi_fw_images array defined per platform.

Signed-off-by: Sughosh Ganu <[email protected]>
Reviewed-by: Masami Hiramatsu <[email protected]>

lib/efi_loader/efi_firmware.c

@@ -97,91 +97,57 @@ efi_status_t EFIAPI efi_firmware_set_package_info_unsupported(
 }
 
 /**
- * efi_get_dfu_info - return information about the current firmware image
- * @this:			Protocol instance
+ * efi_fill_image_desc_array - populate image descriptor array
  * @image_info_size:		Size of @image_info
  * @image_info:			Image information
  * @descriptor_version:		Pointer to version number
- * @descriptor_count:		Pointer to number of descriptors
+ * @descriptor_count:		Image count
  * @descriptor_size:		Pointer to descriptor size
- * package_version:		Package version
- * package_version_name:	Package version's name
- * image_type:			Image type GUID
+ * @package_version:		Package version
+ * @package_version_name:	Package version's name
  *
- * Return information bout the current firmware image in @image_info.
+ * Return information about the current firmware image in @image_info.
  * @image_info will consist of a number of descriptors.
- * Each descriptor will be created based on "dfu_alt_info" variable.
+ * Each descriptor will be created based on efi_fw_image array.
  *
  * Return		status code
  */
-static efi_status_t efi_get_dfu_info(
+static efi_status_t efi_fill_image_desc_array(
 	efi_uintn_t *image_info_size,
 	struct efi_firmware_image_descriptor *image_info,
 	u32 *descriptor_version,
 	u8 *descriptor_count,
 	efi_uintn_t *descriptor_size,
 	u32 *package_version,
-	u16 **package_version_name,
-	const efi_guid_t *image_type)
+	u16 **package_version_name)
 {
-	struct dfu_entity *dfu;
-	size_t names_len, total_size;
-	int dfu_num, i;
-	u16 *name, *next;
-	int ret;
-
-	ret = dfu_init_env_entities(NULL, NULL);
-	if (ret)
-		return EFI_SUCCESS;
-
-	names_len = 0;
-	dfu_num = 0;
-	list_for_each_entry(dfu, &dfu_list, list) {
-		names_len += (utf8_utf16_strlen(dfu->name) + 1) * 2;
-		dfu_num++;
-	}
-	if (!dfu_num) {
-		log_warning("No entities in dfu_alt_info\n");
-		*image_info_size = 0;
-		dfu_free_entities();
+	size_t total_size;
+	struct efi_fw_image *fw_array;
+	int i;
 
-		return EFI_SUCCESS;
-	}
+	fw_array = update_info.images;
+	*descriptor_count = num_image_type_guids;
+
+	total_size = sizeof(*image_info) * num_image_type_guids;
 
-	total_size = sizeof(*image_info) * dfu_num + names_len;
-	/*
-	 * we will assume that sizeof(*image_info) * dfu_name
-	 * is, at least, a multiple of 2. So the start address for
-	 * image_id_name would be aligned with 2 bytes.
-	 */
 	if (*image_info_size < total_size) {
 		*image_info_size = total_size;
-		dfu_free_entities();
 
 		return EFI_BUFFER_TOO_SMALL;
 	}
 	*image_info_size = total_size;
 
 	*descriptor_version = EFI_FIRMWARE_IMAGE_DESCRIPTOR_VERSION;
-	*descriptor_count = dfu_num;
 	*descriptor_size = sizeof(*image_info);
 	*package_version = 0xffffffff; /* not supported */
 	*package_version_name = NULL; /* not supported */
 
-	/* DFU alt number should correspond to image_index */
-	i = 0;
-	/* Name area starts just after descriptors */
-	name = (u16 *)((u8 *)image_info + sizeof(*image_info) * dfu_num);
-	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;
-		image_info[i].image_id = dfu->alt;
-
-		/* copy the DFU entity name */
-		utf8_utf16_strcpy(&next, dfu->name);
-		image_info[i].image_id_name = name;
-		name = ++next;
+	for (i = 0; i < num_image_type_guids; i++) {
+		image_info[i].image_index = fw_array[i].image_index;
+		image_info[i].image_type_id = fw_array[i].image_type_id;
+		image_info[i].image_id = fw_array[i].image_index;
+
+		image_info[i].image_id_name = fw_array[i].fw_name;
 
 		image_info[i].version = 0; /* not supported */
 		image_info[i].version_name = NULL; /* not supported */
@@ -202,12 +168,8 @@ static efi_status_t efi_get_dfu_info(
 		image_info[i].last_attempt_status = LAST_ATTEMPT_STATUS_SUCCESS;
 		image_info[i].hardware_instance = 1;
 		image_info[i].dependencies = NULL;
-
-		i++;
 	}
 
-	dfu_free_entities();
-
 	return EFI_SUCCESS;
 }
 
@@ -267,11 +229,10 @@ efi_status_t EFIAPI efi_firmware_fit_get_image_info(
 	     !descriptor_size || !package_version || !package_version_name))
 		return EFI_EXIT(EFI_INVALID_PARAMETER);
 
-	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);
+	ret = efi_fill_image_desc_array(image_info_size, image_info,
+					descriptor_version, descriptor_count,
+					descriptor_size, package_version,
+					package_version_name);
 
 	return EFI_EXIT(ret);
 }
@@ -376,11 +337,10 @@ efi_status_t EFIAPI efi_firmware_raw_get_image_info(
 	     !descriptor_size || !package_version || !package_version_name))
 		return EFI_EXIT(EFI_INVALID_PARAMETER);
 
-	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);
+	ret = efi_fill_image_desc_array(image_info_size, image_info,
+					descriptor_version, descriptor_count,
+					descriptor_size, package_version,
+					package_version_name);
 
 	return EFI_EXIT(ret);
 }