790     int dh;  member
798     return core->mac[r->dh] == core->mac[r->dt] ||  in e1000e_ring_empty()
814     return e1000e_ring_base(core, r) + E1000_RING_DESC_LEN * core->mac[r->dh];  in e1000e_ring_head_descr()
820     core->mac[r->dh] += count;  in e1000e_ring_advance()
822     if (core->mac[r->dh] * E1000_RING_DESC_LEN >= core->mac[r->dlen]) {  in e1000e_ring_advance()
823         core->mac[r->dh] = 0;  in e1000e_ring_advance()
831                                  core->mac[r->dh],  core->mac[r->dt]);  in e1000e_ring_free_descr_num()
833     if (core->mac[r->dh] <= core->mac[r->dt]) {  in e1000e_ring_free_descr_num()
834         return core->mac[r->dt] - core->mac[r->dh];  in e1000e_ring_free_descr_num()
837     if (core->mac[r->dh] > core->mac[r->dt]) {  in e1000e_ring_free_descr_num()
839                core->mac[r->dt] - core->mac[r->dh];  in e1000e_ring_free_descr_num()