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 )
145 nm_ring_space(struct netmap_ring *ring)  in nm_ring_space()  argument
147         int ret = ring->tail - ring->head;  in nm_ring_space()
149                 ret += ring->num_slots;  in nm_ring_space()
1027 		struct netmap_ring *ring;  in nm_inject()  local
1033 		ring = NETMAP_TXRING(d->nifp, ri);  in nm_inject()
1035 		j = ring->cur;  in nm_inject()
1036 		while (rem > ring->nr_buf_size && j != ring->tail) {  in nm_inject()
1037 			rem -= ring->nr_buf_size;  in nm_inject()
1038 			j = nm_ring_next(ring, j);  in nm_inject()
1040 		if (j == ring->tail && rem > 0)  in nm_inject()
1042 		i = ring->cur;  in nm_inject()
1044 			idx = ring->slot[i].buf_idx;  in nm_inject()
1045 			ring->slot[i].len = ring->nr_buf_size;  in nm_inject()
1046 			ring->slot[i].flags = NS_MOREFRAG;  in nm_inject()
1047 			nm_pkt_copy(buf, NETMAP_BUF(ring, idx), ring->nr_buf_size);  in nm_inject()
1048 			i = nm_ring_next(ring, i);  in nm_inject()
1049 			buf = (const char *)buf + ring->nr_buf_size;  in nm_inject()
1051 		idx = ring->slot[i].buf_idx;  in nm_inject()
1052 		ring->slot[i].len = rem;  in nm_inject()
1053 		ring->slot[i].flags = 0;  in nm_inject()
1054 		nm_pkt_copy(buf, NETMAP_BUF(ring, idx), rem);  in nm_inject()
1055 		ring->head = ring->cur = nm_ring_next(ring, i);  in nm_inject()
1082 		struct netmap_ring *ring;  in nm_dispatch()  local
1086 		ring = NETMAP_RXRING(d->nifp, ri);  in nm_dispatch()
1087 		for ( ; !nm_ring_empty(ring) && cnt != got; got++) {  in nm_dispatch()
1094 			i = ring->cur;  in nm_dispatch()
1095 			slot = &ring->slot[i];  in nm_dispatch()
1101 			oldbuf = d->hdr.buf = (u_char *)NETMAP_BUF(ring, idx);  in nm_dispatch()
1107 				i = nm_ring_next(ring, i);  in nm_dispatch()
1108 				slot = &ring->slot[i];  in nm_dispatch()
1110 				nbuf = (u_char *)NETMAP_BUF(ring, slot->buf_idx);  in nm_dispatch()
1111 				if (oldbuf != NULL && nbuf - oldbuf == (int)ring->nr_buf_size &&  in nm_dispatch()
1112 						oldlen == ring->nr_buf_size) {  in nm_dispatch()
1119 			d->hdr.ts = ring->ts;  in nm_dispatch()
1120 			ring->head = ring->cur = nm_ring_next(ring, i);  in nm_dispatch()
1137 		struct netmap_ring *ring = NETMAP_RXRING(d->nifp, ri);  in nm_nextpkt()  local
1138 		if (!nm_ring_empty(ring)) {  in nm_nextpkt()
1139 			u_int i = ring->cur;  in nm_nextpkt()
1140 			u_int idx = ring->slot[i].buf_idx;  in nm_nextpkt()
1141 			u_char *buf = (u_char *)NETMAP_BUF(ring, idx);  in nm_nextpkt()
1144 			hdr->ts = ring->ts;  in nm_nextpkt()
1145 			hdr->len = hdr->caplen = ring->slot[i].len;  in nm_nextpkt()
1146 			ring->cur = nm_ring_next(ring, i);  in nm_nextpkt()
1151 			ring->head = ring->cur;  in nm_nextpkt()