WR_FLITS
#define WR_LEN (WR_FLITS * 8)
unsigned int avail = WR_FLITS - flits;
wrp->wrh_lo = htonl(V_WR_LEN(min(WR_FLITS,
wp->wrh_lo = htonl(V_WR_LEN(WR_FLITS) | V_WR_GEN(ogen)) | wr_lo;