id32_alloc
cmd->ctx = id32_alloc(cmd, sleep);
extern uint32_t id32_alloc(void *, int);
#define EHCI_GET_ID(x) id32_alloc((void *)(x), KM_SLEEP)
#define OHCI_GET_ID(x) id32_alloc((void *)(x), KM_SLEEP)
#define SOCAL_ID_GET(x, w) id32_alloc((x), (w))