1 #ifndef _NET_GRO_CELLS_H
2 #define _NET_GRO_CELLS_H
4 #include <linux/skbuff.h>
5 #include <linux/slab.h>
6 #include <linux/netdevice.h>
9 struct sk_buff_head napi_skbs;
10 struct napi_struct napi;
14 struct gro_cell __percpu *cells;
17 static inline int gro_cells_receive(struct gro_cells *gcells, struct sk_buff *skb)
19 struct gro_cell *cell;
20 struct net_device *dev = skb->dev;
24 if (unlikely(!(dev->flags & IFF_UP)))
27 if (!gcells->cells || skb_cloned(skb) || !(dev->features & NETIF_F_GRO)) {
32 cell = this_cpu_ptr(gcells->cells);
34 if (skb_queue_len(&cell->napi_skbs) > netdev_max_backlog) {
36 atomic_long_inc(&dev->rx_dropped);
42 __skb_queue_tail(&cell->napi_skbs, skb);
43 if (skb_queue_len(&cell->napi_skbs) == 1)
44 napi_schedule(&cell->napi);
53 /* called under BH context */
54 static inline int gro_cell_poll(struct napi_struct *napi, int budget)
56 struct gro_cell *cell = container_of(napi, struct gro_cell, napi);
60 while (work_done < budget) {
61 skb = __skb_dequeue(&cell->napi_skbs);
64 napi_gro_receive(napi, skb);
68 if (work_done < budget)
69 napi_complete_done(napi, work_done);
73 static inline int gro_cells_init(struct gro_cells *gcells, struct net_device *dev)
77 gcells->cells = alloc_percpu(struct gro_cell);
81 for_each_possible_cpu(i) {
82 struct gro_cell *cell = per_cpu_ptr(gcells->cells, i);
84 __skb_queue_head_init(&cell->napi_skbs);
86 set_bit(NAPI_STATE_NO_BUSY_POLL, &cell->napi.state);
88 netif_napi_add(dev, &cell->napi, gro_cell_poll, 64);
89 napi_enable(&cell->napi);
94 static inline void gro_cells_destroy(struct gro_cells *gcells)
100 for_each_possible_cpu(i) {
101 struct gro_cell *cell = per_cpu_ptr(gcells->cells, i);
103 napi_disable(&cell->napi);
104 netif_napi_del(&cell->napi);
105 __skb_queue_purge(&cell->napi_skbs);
107 free_percpu(gcells->cells);
108 gcells->cells = NULL;