GEM_NTXDESC
v = gem_ringsize(GEM_NTXDESC /*XXX*/);
if (sc->sc_txfree == GEM_NTXDESC - 1)
for (i = 0; i < GEM_NTXDESC; i++) {
GEM_CDTXSYNC(sc, 0, GEM_NTXDESC,
sc->sc_txfree = GEM_NTXDESC-1;
if ((__x + __n) > GEM_NTXDESC) { \
(GEM_NTXDESC - __x), (ops)); \
__n -= (GEM_NTXDESC - __x); \
#define GEM_NTXDESC_MASK (GEM_NTXDESC - 1)
struct gem_desc gcd_txdescs[GEM_NTXDESC];