feat(indirect messaging): change mailbox state on RX buffer full
Mailbox state transitions from RECEIVED to READ when the VM gets
notification and RX buffer full is set.
Change-Id: Ib90acf4b2949e1164bd7325d6ce14c4d203a37a7
Signed-off-by: Federico Recanati <federico.recanati@arm.com>
diff --git a/src/vm.c b/src/vm.c
index 2c479f3..514c74c 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -779,9 +779,27 @@
ffa_notifications_bitmap_t vm_notifications_framework_get_pending(
struct vm_locked vm_locked)
{
- assert(vm_locked.vm != NULL);
- return vm_notifications_state_get_pending(
- &vm_locked.vm->notifications.framework);
+ struct vm *vm = vm_locked.vm;
+ ffa_notifications_bitmap_t framework;
+ bool rx_buffer_full;
+
+ assert(vm != NULL);
+
+ framework = vm_notifications_state_get_pending(
+ &vm->notifications.framework);
+
+ /*
+ * By retrieving an RX buffer full notification the buffer state
+ * transitions from RECEIVED to READ; the VM is now the RX buffer
+ * owner, can read it and is allowed to release it.
+ */
+ rx_buffer_full = is_ffa_spm_buffer_full_notification(framework) ||
+ is_ffa_hyp_buffer_full_notification(framework);
+ if (rx_buffer_full && vm->mailbox.state == MAILBOX_STATE_RECEIVED) {
+ vm->mailbox.state = MAILBOX_STATE_READ;
+ }
+
+ return framework;
}
static void vm_notifications_state_info_get(