119 #define NETMAP_BUF(ring, index)				\  argument
120 	((char *)(ring) + (ring)->buf_ofs + ((size_t)(index)*(ring)->nr_buf_size))
122 #define NETMAP_BUF_IDX(ring, buf)			\  argument
123 	( ((char *)(buf) - ((char *)(ring) + (ring)->buf_ofs) ) / \
124 		(ring)->nr_buf_size )
147 nm_ring_space(struct netmap_ring *ring)  in nm_ring_space()  argument
149         int ret = ring->tail - ring->head;  in nm_ring_space()
151                 ret += ring->num_slots;  in nm_ring_space()
1034 		struct netmap_ring *ring;  in nm_inject()  local
1040 		ring = NETMAP_TXRING(d->nifp, ri);  in nm_inject()
1042 		j = ring->cur;  in nm_inject()
1043 		while (rem > ring->nr_buf_size && j != ring->tail) {  in nm_inject()
1044 			rem -= ring->nr_buf_size;  in nm_inject()
1045 			j = nm_ring_next(ring, j);  in nm_inject()
1047 		if (j == ring->tail && rem > 0)  in nm_inject()
1049 		i = ring->cur;  in nm_inject()
1051 			idx = ring->slot[i].buf_idx;  in nm_inject()
1052 			ring->slot[i].len = ring->nr_buf_size;  in nm_inject()
1053 			ring->slot[i].flags = NS_MOREFRAG;  in nm_inject()
1054 			nm_pkt_copy(buf, NETMAP_BUF(ring, idx), ring->nr_buf_size);  in nm_inject()
1055 			i = nm_ring_next(ring, i);  in nm_inject()
1056 			buf = (char *)buf + ring->nr_buf_size;  in nm_inject()
1058 		idx = ring->slot[i].buf_idx;  in nm_inject()
1059 		ring->slot[i].len = rem;  in nm_inject()
1060 		ring->slot[i].flags = 0;  in nm_inject()
1061 		nm_pkt_copy(buf, NETMAP_BUF(ring, idx), rem);  in nm_inject()
1062 		ring->head = ring->cur = nm_ring_next(ring, i);  in nm_inject()
1090 		struct netmap_ring *ring;  in nm_dispatch()  local
1094 		ring = NETMAP_RXRING(d->nifp, ri);  in nm_dispatch()
1095 		for ( ; !nm_ring_empty(ring) && cnt != got; got++) {  in nm_dispatch()
1102 			i = ring->cur;  in nm_dispatch()
1103 			slot = &ring->slot[i];  in nm_dispatch()
1109 			oldbuf = d->hdr.buf = (u_char *)NETMAP_BUF(ring, idx);  in nm_dispatch()
1115 				i = nm_ring_next(ring, i);  in nm_dispatch()
1116 				slot = &ring->slot[i];  in nm_dispatch()
1118 				nbuf = (u_char *)NETMAP_BUF(ring, slot->buf_idx);  in nm_dispatch()
1119 				if (oldbuf != NULL && nbuf - oldbuf == ring->nr_buf_size &&  in nm_dispatch()
1120 						oldlen == ring->nr_buf_size) {  in nm_dispatch()
1127 			d->hdr.ts = ring->ts;  in nm_dispatch()
1128 			ring->head = ring->cur = nm_ring_next(ring, i);  in nm_dispatch()
1145 		struct netmap_ring *ring = NETMAP_RXRING(d->nifp, ri);  in nm_nextpkt()  local
1146 		if (!nm_ring_empty(ring)) {  in nm_nextpkt()
1147 			u_int i = ring->cur;  in nm_nextpkt()
1148 			u_int idx = ring->slot[i].buf_idx;  in nm_nextpkt()
1149 			u_char *buf = (u_char *)NETMAP_BUF(ring, idx);  in nm_nextpkt()
1152 			hdr->ts = ring->ts;  in nm_nextpkt()
1153 			hdr->len = hdr->caplen = ring->slot[i].len;  in nm_nextpkt()
1154 			ring->cur = nm_ring_next(ring, i);  in nm_nextpkt()
1159 			ring->head = ring->cur;  in nm_nextpkt()