one_qsfp_read
if (one_qsfp_read(ppd, dd->hfi1_id, 6,
ret = one_qsfp_read(ppd, ppd->dd->hfi1_id, 2, &status, 1);
ret = one_qsfp_read(ppd, dd->hfi1_id, addr, data + offset, len);
int one_qsfp_read(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,