[PATCH 10/18] fwu: mtd: Modify the DFU API's to align with metadata version 2

[Sughosh Ganu]

Make changes to the functions used for generating the DFU's alt
variable so that they are aligned with changes to the metadata version
2.

These changes include getting the number of banks and images per bank
at runtime from the metadata, as well as accessing the updatable image
information from the FWU MTD driver's private structure.

Signed-off-by: Sughosh Ganu <sughosh.ganu at linaro.org>
---
 lib/fwu_updates/fwu_mtd.c | 76 +++++++++++++++++++++++++++++----------
 1 file changed, 58 insertions(+), 18 deletions(-)

diff --git a/lib/fwu_updates/fwu_mtd.c b/lib/fwu_updates/fwu_mtd.c
index 69cd3d7001..a82133de2e 100644
--- a/lib/fwu_updates/fwu_mtd.c
+++ b/lib/fwu_updates/fwu_mtd.c
@@ -15,16 +15,51 @@
 
 #include <dm/ofnode.h>
 
-struct fwu_mtd_image_info
-fwu_mtd_images[CONFIG_FWU_NUM_BANKS * CONFIG_FWU_NUM_IMAGES_PER_BANK];
+static struct fwu_mdata *mdata;
+
+static int read_mdata(void)
+{
+	int ret = 0;
+	u32 mdata_size;
+
+	ret = fwu_get_mdata_size(&mdata_size);
+	if (ret)
+		return ret;
+
+	mdata = malloc(mdata_size);
+	if (!mdata)
+		return -ENOMEM;
+
+	ret = fwu_get_mdata(mdata);
+	if (ret < 0) {
+		log_err("Failed to get the FWU mdata\n");
+		free(mdata);
+		mdata = NULL;
+	}
+
+	return ret;
+}
 
 static struct fwu_mtd_image_info *mtd_img_by_uuid(const char *uuidbuf)
 {
-	int num_images = ARRAY_SIZE(fwu_mtd_images);
+	u8 nbanks;
+	u16 nimages;
+	int num_images, ret;
+	struct fwu_mdata_mtd_priv *mtd_priv = dev_get_priv(fwu_get_dev());
+	struct fwu_mtd_image_info *image_info = mtd_priv->fwu_mtd_images;
+
+	if (!image_info)
+		return NULL;
+
+	ret = fwu_get_banks_images(&nbanks, &nimages);
+	if (ret)
+		return NULL;
+
+	num_images = nbanks * nimages;
 
 	for (int i = 0; i < num_images; i++)
-		if (!strcmp(uuidbuf, fwu_mtd_images[i].uuidbuf))
-			return &fwu_mtd_images[i];
+		if (!strcmp(uuidbuf, image_info[i].uuidbuf))
+			return &image_info[i];
 
 	return NULL;
 }
@@ -108,7 +143,8 @@ __weak int fwu_plat_get_alt_num(struct udevice *dev, efi_guid_t *image_id,
 }
 
 static int gen_image_alt_info(char *buf, size_t len, int sidx,
-			      struct fwu_image_entry *img, struct mtd_info *mtd)
+			      struct fwu_image_entry *img,
+			      struct mtd_info *mtd, uint8_t num_banks)
 {
 	char *p = buf, *end = buf + len;
 	int i;
@@ -123,7 +159,7 @@ static int gen_image_alt_info(char *buf, size_t len, int sidx,
 	 * List the image banks in the FWU mdata and search the corresponding
 	 * partition based on partition's uuid.
 	 */
-	for (i = 0; i < CONFIG_FWU_NUM_BANKS; i++) {
+	for (i = 0; i < num_banks; i++) {
 		struct fwu_mtd_image_info *mtd_img_info;
 		struct fwu_image_bank_info *bank;
 		char uuidbuf[UUID_STR_LEN + 1];
@@ -131,7 +167,7 @@ static int gen_image_alt_info(char *buf, size_t len, int sidx,
 
 		/* Query a partition by image UUID */
 		bank = &img->img_bank_info[i];
-		uuid_bin_to_str(bank->image_uuid.b, uuidbuf, UUID_STR_FORMAT_STD);
+		uuid_bin_to_str(bank->image_guid.b, uuidbuf, UUID_STR_FORMAT_STD);
 
 		mtd_img_info = mtd_img_by_uuid(uuidbuf);
 		if (!mtd_img_info) {
@@ -150,7 +186,7 @@ static int gen_image_alt_info(char *buf, size_t len, int sidx,
 		}
 	}
 
-	if (i == CONFIG_FWU_NUM_BANKS)
+	if (i == num_banks)
 		return 0;
 
 	return -ENOENT;
@@ -158,24 +194,28 @@ static int gen_image_alt_info(char *buf, size_t len, int sidx,
 
 int fwu_gen_alt_info_from_mtd(char *buf, size_t len, struct mtd_info *mtd)
 {
-	struct fwu_mdata mdata;
+	u8 num_banks;
+	u16 num_images;
 	int i, l, ret;
 
-	ret = fwu_get_mdata(&mdata);
-	if (ret < 0) {
-		log_err("Failed to get the FWU mdata.\n");
-		return ret;
+	if (!mdata) {
+		ret = read_mdata();
+		if (ret)
+			return ret;
 	}
 
-	for (i = 0; i < CONFIG_FWU_NUM_IMAGES_PER_BANK; i++) {
-		ret = gen_image_alt_info(buf, len, i * CONFIG_FWU_NUM_BANKS,
-					 &mdata.img_entry[i], mtd);
+	num_banks = mdata->fw_desc[0].num_banks;
+	num_images = mdata->fw_desc[0].num_images;
+	for (i = 0; i < num_images; i++) {
+		ret = gen_image_alt_info(buf, len, i * num_banks,
+					 &mdata->fw_desc[0].img_entry[i],
+					 mtd, num_banks);
 		if (ret)
 			break;
 
 		l = strlen(buf);
 		/* Replace the last ';' with '&' if there is another image. */
-		if (i != CONFIG_FWU_NUM_IMAGES_PER_BANK - 1 && l) {
+		if (i != num_images - 1 && l) {
 			buf[l] = '&';
 			buf++;
 		}
-- 
2.34.1