images/trusted_applications/load_ree_ta.msc

# Generate with:
# mscgen -T png -o images/trusted_applications/load_ree_ta.png \
# 		images/trusted_applications/load_ree_ta.msc

msc {
	hscale = "2", wordwraparcs = on;

	a [label="OP-TEE Core"], b [label="Kernel OP-TEE driver"],
	c [label="tee-supplicant"];

	||| ;
	--- [ label = " OP-TEE loading a REE TA using rpc_load() "];
	... ;
	--- [ label = " Query size of TA " ];
	a=>b [ label = "RPC_CMD_LOAD_TA(TA uuid)" ];
	b=>c [ label = "RPC_CMD_LOAD_TA(TA uuid)" ];
	c=>c [ label = "Check size of TA with uuid" ];
	c>>b [ label = "Return size of TA" ];
	b>>a [ label = "Return size of TA" ];
	--- [ label = " Allocate payload buffer " ];
	a=>b [ label = "RPC_CMD_SHM_ALLOC(SHM_TYPE_APPL, size)" ];
	b=>c [ label = "RPC_CMD_SHM_ALLOC(SHM_TYPE_APPL, size)" ];
	c=>c [ label = "malloc(size)" ];
	c=>b [ label = "ioctl(SHM_REGISTER)" ];
	b=>b [ label = "allocate shm_ref" ];
	b=>b [ label = "create shm_ref ID" ];
	b=>a [ label = "CMD_REGISTER_SHM(shm_ref)" ];
	a>>b;
	b>>c [ label = "return shm_ref ID" ];
	c>>b [ label = "return shm_ref ID" ];
	b>>a [ label = "return shm_ref" ];
	--- [ label = " Load TA into payload buffer " ];
	a=>b [ label = "RPC_CMD_LOAD_TA(TA uuid, shm_ref)" ];
	b=>c [ label = "RPC_CMD_LOAD_TA(TA uuid, shm_ref ID)" ];
	c=>c [ label = "Copy TA into payload buffer" ];
	c>>b;
	b>>a;
}