diff options
| author | Govindarajulu Varadarajan <_govind@gmx.com> | 2014-06-23 14:38:02 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-06-24 01:32:19 +0400 |
| commit | a145df23ef32c7b933875f334ba28791ee75766e (patch) | |
| tree | 400e7f3788d38f7639ddad71d6cb698a335581f2 /drivers/net/ethernet/cisco/enic/enic.h | |
| parent | b6e97c132bbca469d57634622dd7bdacb21f018f (diff) | |
| download | linux-a145df23ef32c7b933875f334ba28791ee75766e.tar.xz | |
enic: Add Accelerated RFS support
This patch adds supports for Accelerated Receive Flow Steering.
When the desired rx is different from current rq, for a flow, kernel calls the
driver function enic_rx_flow_steer(). enic_rx_flow_steer adds a IP-TCP/UDP
hardware filter.
Driver registers a timer function enic_flow_may_expire. This function is called
every HZ/4 seconds. In this function we check if the added filter has expired
by calling rps_may_expire_flow(). If the flow has expired, it removes the hw
filter.
As of now adaptor supports only IPv4 - TCP/UDP filters.
Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/cisco/enic/enic.h')
| -rw-r--r-- | drivers/net/ethernet/cisco/enic/enic.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cisco/enic/enic.h b/drivers/net/ethernet/cisco/enic/enic.h index 14f465f239d6..b9b9178e174e 100644 --- a/drivers/net/ethernet/cisco/enic/enic.h +++ b/drivers/net/ethernet/cisco/enic/enic.h @@ -99,6 +99,44 @@ struct enic_port_profile { u8 mac_addr[ETH_ALEN]; }; +#ifdef CONFIG_RFS_ACCEL +/* enic_rfs_fltr_node - rfs filter node in hash table + * @@keys: IPv4 5 tuple + * @flow_id: flow_id of clsf filter provided by kernel + * @fltr_id: filter id of clsf filter returned by adaptor + * @rq_id: desired rq index + * @node: hlist_node + */ +struct enic_rfs_fltr_node { + struct flow_keys keys; + u32 flow_id; + u16 fltr_id; + u16 rq_id; + struct hlist_node node; +}; + +/* enic_rfs_flw_tbl - rfs flow table + * @max: Maximum number of filters vNIC supports + * @free: Number of free filters available + * @toclean: hash table index to clean next + * @ht_head: hash table list head + * @lock: spin lock + * @rfs_may_expire: timer function for enic_rps_may_expire_flow + */ +struct enic_rfs_flw_tbl { + u16 max; + int free; + +#define ENIC_RFS_FLW_BITSHIFT (10) +#define ENIC_RFS_FLW_MASK ((1 << ENIC_RFS_FLW_BITSHIFT) - 1) + u16 toclean:ENIC_RFS_FLW_BITSHIFT; + struct hlist_head ht_head[1 << ENIC_RFS_FLW_BITSHIFT]; + spinlock_t lock; + struct timer_list rfs_may_expire; +}; + +#endif /* CONFIG_RFS_ACCEL */ + /* Per-instance private data structure */ struct enic { struct net_device *netdev; @@ -150,6 +188,9 @@ struct enic { /* completion queue cache line section */ ____cacheline_aligned struct vnic_cq cq[ENIC_CQ_MAX]; unsigned int cq_count; +#ifdef CONFIG_RFS_ACCEL + struct enic_rfs_flw_tbl rfs_h; +#endif }; static inline struct device *enic_get_dev(struct enic *enic) |