Lines Matching refs:head
55 int head, tail;
59 * Update head and tail of xmit buffer
63 head = iforce->xmit.head;
67 if (CIRC_SPACE(head, tail, XMIT_SIZE) < n+2) {
74 empty = head == tail;
75 XMIT_INC(iforce->xmit.head, n+2);
80 iforce->xmit.buf[head] = HI(cmd);
81 XMIT_INC(head, 1);
82 iforce->xmit.buf[head] = LO(cmd);
83 XMIT_INC(head, 1);
85 c = CIRC_SPACE_TO_END(head, tail, XMIT_SIZE);
88 memcpy(&iforce->xmit.buf[head],
96 XMIT_INC(head, n);