diff options
author | Tom Herbert <therbert@google.com> | 2010-11-26 08:36:09 +0000 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2010-11-28 18:24:14 -0800 |
commit | bf26414510103448ad3dc069c7422462f03ea3d7 (patch) | |
tree | b8930bb2850dbc65f1e1f4e8bc6574f3c956b772 /include | |
parent | 8fa9208e305e24978b897d6ea057604444ce77e1 (diff) | |
download | linux-stable-bf26414510103448ad3dc069c7422462f03ea3d7.tar.gz linux-stable-bf26414510103448ad3dc069c7422462f03ea3d7.tar.bz2 linux-stable-bf26414510103448ad3dc069c7422462f03ea3d7.zip |
xps: Add CONFIG_XPS
This patch adds XPS_CONFIG option to enable and disable XPS. This is
done in the same manner as RPS_CONFIG. This is also fixes build
failure in XPS code when SMP is not enabled.
Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/netdevice.h | 52 |
1 files changed, 28 insertions, 24 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 7c6ae2f4b9ab..9ae4544f0cf0 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -536,30 +536,6 @@ struct rps_map { #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16))) /* - * This structure holds an XPS map which can be of variable length. The - * map is an array of queues. - */ -struct xps_map { - unsigned int len; - unsigned int alloc_len; - struct rcu_head rcu; - u16 queues[0]; -}; -#define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + (_num * sizeof(u16))) -#define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \ - / sizeof(u16)) - -/* - * This structure holds all XPS maps for device. Maps are indexed by CPU. - */ -struct xps_dev_maps { - struct rcu_head rcu; - struct xps_map *cpu_map[0]; -}; -#define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \ - (nr_cpu_ids * sizeof(struct xps_map *))) - -/* * The rps_dev_flow structure contains the mapping of a flow to a CPU and the * tail pointer for that CPU's input queue at the time of last enqueue. */ @@ -626,6 +602,32 @@ struct netdev_rx_queue { } ____cacheline_aligned_in_smp; #endif /* CONFIG_RPS */ +#ifdef CONFIG_XPS +/* + * This structure holds an XPS map which can be of variable length. The + * map is an array of queues. + */ +struct xps_map { + unsigned int len; + unsigned int alloc_len; + struct rcu_head rcu; + u16 queues[0]; +}; +#define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + (_num * sizeof(u16))) +#define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \ + / sizeof(u16)) + +/* + * This structure holds all XPS maps for device. Maps are indexed by CPU. + */ +struct xps_dev_maps { + struct rcu_head rcu; + struct xps_map *cpu_map[0]; +}; +#define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \ + (nr_cpu_ids * sizeof(struct xps_map *))) +#endif /* CONFIG_XPS */ + /* * This structure defines the management hooks for network devices. * The following hooks can be defined; unless noted otherwise, they are @@ -1046,7 +1048,9 @@ struct net_device { unsigned long tx_queue_len; /* Max frames per queue allowed */ spinlock_t tx_global_lock; +#ifdef CONFIG_XPS struct xps_dev_maps *xps_maps; +#endif /* These may be needed for future network-power-down code. */ |