fwu: check all images for transitioning out of Trial State

The platform transitions out of Trial State into the Regular State
only when all the images in the update bank have been accepted. Check
for this condition before transitioning out of Trial State.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Tested-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

include/fwu.h

@@ -417,4 +417,15 @@ int fwu_state_machine_updates(bool trial_state, uint32_t update_index);
  */
 int fwu_init(void);
 
+/**
+ * fwu_bank_accepted() - Has the bank been accepted
+ * @data: Version agnostic FWU metadata information
+ * @bank: Update bank to check
+ *
+ * Check in the given bank if all the images have been accepted.
+ *
+ * Return: true if all images accepted, false otherwise
+ */
+bool fwu_bank_accepted(struct fwu_data *data, uint32_t bank);
+
 #endif /* _FWU_H_ */

lib/fwu_updates/fwu.c

@@ -28,6 +28,31 @@ enum {
 	IMAGE_ACCEPT_CLEAR,
 };
 
+/**
+ * fwu_bank_accepted() - Has the bank been accepted
+ * @data: Version agnostic FWU metadata information
+ * @bank: Update bank to check
+ *
+ * Check in the given bank if all the images have been accepted.
+ *
+ * Return: true if all images accepted, false otherwise
+ */
+bool fwu_bank_accepted(struct fwu_data *data, uint32_t bank)
+{
+	u32 i;
+	struct fwu_image_entry *img_entry;
+	struct fwu_image_bank_info *img_bank_info;
+
+	img_entry = &data->fwu_images[0];
+	for (i = 0; i < CONFIG_FWU_NUM_IMAGES_PER_BANK; i++) {
+		img_bank_info = &img_entry[i].img_bank_info[bank];
+		if (!img_bank_info->accepted)
+			return false;
+	}
+
+	return true;
+}
+
 static int trial_counter_update(u16 *trial_state_ctr)
 {
 	bool delete;

lib/fwu_updates/fwu_v1.c

@@ -52,11 +52,14 @@ static void fwu_data_init(void)
 	memcpy(dst_img_info, src_img_info, image_info_size);
 }
 
-static int fwu_trial_state_update(bool trial_state)
+static int fwu_trial_state_update(bool trial_state, uint32_t bank)
 {
 	int ret;
 	struct fwu_data *data = fwu_get_data();
 
+	if (!trial_state && !fwu_bank_accepted(data, bank))
+		return 0;
+
 	if (trial_state) {
 		ret = fwu_trial_state_ctr_start();
 		if (ret)
@@ -112,9 +115,9 @@ void fwu_populate_mdata_image_info(struct fwu_data *data)
  * Return: 0 if OK, -ve on error
  */
 int fwu_state_machine_updates(bool trial_state,
-			      __maybe_unused uint32_t update_index)
+			      uint32_t update_index)
 {
-	return fwu_trial_state_update(trial_state);
+	return fwu_trial_state_update(trial_state, update_index);
 }
 
 /**

lib/fwu_updates/fwu_v2.c

@@ -85,6 +85,9 @@ static int fwu_bank_state_update(bool trial_state, uint32_t bank)
 	struct fwu_data *data = fwu_get_data();
 	struct fwu_mdata *mdata = data->fwu_mdata;
 
+	if (!trial_state && !fwu_bank_accepted(data, bank))
+		return 0;
+
 	mdata->bank_state[bank] = data->bank_state[bank] = trial_state ?
 		FWU_BANK_VALID : FWU_BANK_ACCEPTED;