t4_mem_range
#define CHELSIO_T4_GET_MEM _IOW('f', T4_GET_MEM, struct t4_mem_range)
read_card_mem(struct adapter *sc, int win, struct t4_mem_range *mr)
rc = read_card_mem(sc, 2, (struct t4_mem_range *)data);
static int read_card_mem(struct adapter *, int, struct t4_mem_range *);
struct t4_mem_range mr;