hfi1_read_cntrs
u32 hfi1_read_cntrs(struct hfi1_devdata *dd, char **namep, u64 **cntrp);
avail = hfi1_read_cntrs(dd, NULL, &counters);
avail = hfi1_read_cntrs(dd, &names, NULL);
hfi1_read_cntrs(dd_from_ibdev(ibdev), NULL, &values);