diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/etherdevice.h | 3 | ||||
| -rw-r--r-- | include/linux/netdevice.h | 80 | ||||
| -rw-r--r-- | include/linux/skbuff.h | 25 |
3 files changed, 99 insertions, 9 deletions
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h index f48eb89..6cdb973 100644 --- a/include/linux/etherdevice.h +++ b/include/linux/etherdevice.h @@ -39,7 +39,8 @@ extern void eth_header_cache_update(struct hh_cache *hh, struct net_device *dev extern int eth_header_cache(struct neighbour *neigh, struct hh_cache *hh); -extern struct net_device *alloc_etherdev(int sizeof_priv); +extern struct net_device *alloc_etherdev_mq(int sizeof_priv, unsigned int queue_count); +#define alloc_etherdev(sizeof_priv) alloc_etherdev_mq(sizeof_priv, 1) /** * is_zero_ether_addr - Determine if give Ethernet address is all zeros. diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 2c0cc19..9817821 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -108,6 +108,14 @@ struct wireless_dev; #define MAX_HEADER (LL_MAX_HEADER + 48) #endif +struct net_device_subqueue +{ + /* Give a control state for each queue. This struct may contain + * per-queue locks in the future. + */ + unsigned long state; +}; + /* * Network device statistics. Akin to the 2.0 ether stats but * with byte counters. @@ -331,6 +339,7 @@ struct net_device #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ #define NETIF_F_GSO 2048 /* Enable software GSO. */ #define NETIF_F_LLTX 4096 /* LockLess TX */ +#define NETIF_F_MULTI_QUEUE 16384 /* Has multiple TX/RX queues */ /* Segmentation offload features */ #define NETIF_F_GSO_SHIFT 16 @@ -557,6 +566,10 @@ struct net_device /* rtnetlink link ops */ const struct rtnl_link_ops *rtnl_link_ops; + + /* The TX queue control structures */ + unsigned int egress_subqueue_count; + struct net_device_subqueue egress_subqueue[0]; }; #define to_net_dev(d) container_of(d, struct net_device, dev) @@ -565,9 +578,7 @@ struct net_device static inline void *netdev_priv(const struct net_device *dev) { - return (char *)dev + ((sizeof(struct net_device) - + NETDEV_ALIGN_CONST) - & ~NETDEV_ALIGN_CONST); + return dev->priv; } #define SET_MODULE_OWNER(dev) do { } while (0) @@ -719,6 +730,62 @@ static inline int netif_running(const struct net_device *dev) return test_bit(__LINK_STATE_START, &dev->state); } +/* + * Routines to manage the subqueues on a device. We only need start + * stop, and a check if it's stopped. All other device management is + * done at the overall netdevice level. + * Also test the device if we're multiqueue. + */ +static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) +{ +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + clear_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state); +#endif +} + +static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) +{ +#ifdef CONFIG_NETDEVICES_MULTIQUEUE +#ifdef CONFIG_NETPOLL_TRAP + if (netpoll_trap()) + return; +#endif + set_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state); +#endif +} + +static inline int netif_subqueue_stopped(const struct net_device *dev, + u16 queue_index) +{ +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + return test_bit(__LINK_STATE_XOFF, + &dev->egress_subqueue[queue_index].state); +#else + return 0; +#endif +} + +static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) +{ +#ifdef CONFIG_NETDEVICES_MULTIQUEUE +#ifdef CONFIG_NETPOLL_TRAP + if (netpoll_trap()) + return; +#endif + if (test_and_clear_bit(__LINK_STATE_XOFF, + &dev->egress_subqueue[queue_index].state)) + __netif_schedule(dev); +#endif +} + +static inline int netif_is_multiqueue(const struct net_device *dev) +{ +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + return (!!(NETIF_F_MULTI_QUEUE & dev->features)); +#else + return 0; +#endif +} /* Use this variant when it is known for sure that it * is executing from interrupt context. @@ -1009,8 +1076,11 @@ static inline void netif_tx_disable(struct net_device *dev) extern void ether_setup(struct net_device *dev); /* Support for loadable net-drivers */ -extern struct net_device *alloc_netdev(int sizeof_priv, const char *name, - void (*setup)(struct net_device *)); +extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, + void (*setup)(struct net_device *), + unsigned int queue_count); +#define alloc_netdev(sizeof_priv, name, setup) \ + alloc_netdev_mq(sizeof_priv, name, setup, 1) extern int register_netdev(struct net_device *dev); extern void unregister_netdev(struct net_device *dev); /* Functions used for secondary unicast and multicast support */ diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 881fe80..2d6a14f 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -196,7 +196,6 @@ typedef unsigned char *sk_buff_data_t; * @sk: Socket we are owned by * @tstamp: Time we arrived * @dev: Device we arrived on/are leaving by - * @iif: ifindex of device we arrived on * @transport_header: Transport layer header * @network_header: Network layer header * @mac_header: Link layer header @@ -231,6 +230,8 @@ typedef unsigned char *sk_buff_data_t; * @nfctinfo: Relationship of this skb to the connection * @nfct_reasm: netfilter conntrack re-assembly pointer * @nf_bridge: Saved data about a bridged frame - see br_netfilter.c + * @iif: ifindex of device we arrived on + * @queue_mapping: Queue mapping for multiqueue devices * @tc_index: Traffic control index * @tc_verd: traffic control verdict * @dma_cookie: a cookie to one of several possible DMA operations @@ -246,8 +247,6 @@ struct sk_buff { struct sock *sk; ktime_t tstamp; struct net_device *dev; - int iif; - /* 4 byte hole on 64 bit*/ struct dst_entry *dst; struct sec_path *sp; @@ -290,12 +289,18 @@ struct sk_buff { #ifdef CONFIG_BRIDGE_NETFILTER struct nf_bridge_info *nf_bridge; #endif + + int iif; + __u16 queue_mapping; + #ifdef CONFIG_NET_SCHED __u16 tc_index; /* traffic control index */ #ifdef CONFIG_NET_CLS_ACT __u16 tc_verd; /* traffic control verdict */ #endif #endif + /* 2 byte hole */ + #ifdef CONFIG_NET_DMA dma_cookie_t dma_cookie; #endif @@ -1725,6 +1730,20 @@ static inline void skb_init_secmark(struct sk_buff *skb) { } #endif +static inline void skb_set_queue_mapping(struct sk_buff *skb, u16 queue_mapping) +{ +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + skb->queue_mapping = queue_mapping; +#endif +} + +static inline void skb_copy_queue_mapping(struct sk_buff *to, const struct sk_buff *from) +{ +#ifdef CONFIG_NETDEVICES_MULTIQUEUE + to->queue_mapping = from->queue_mapping; +#endif +} + static inline int skb_is_gso(const struct sk_buff *skb) { return skb_shinfo(skb)->gso_size; |
