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>
diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c
index 151b375..a302f1b 100644
--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c
@@ -52,6 +52,7 @@
#include "enic.h"
#include "enic_dev.h"
#include "enic_pp.h"
+#include "enic_clsf.h"
#define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ)
#define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS)
@@ -1546,6 +1547,7 @@
vnic_intr_unmask(&enic->intr[i]);
enic_notify_timer_start(enic);
+ enic_rfs_flw_tbl_init(enic);
return 0;
@@ -1572,6 +1574,7 @@
enic_synchronize_irqs(enic);
del_timer_sync(&enic->notify_timer);
+ enic_rfs_flw_tbl_free(enic);
enic_dev_disable(enic);
@@ -2064,6 +2067,9 @@
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = enic_poll_controller,
#endif
+#ifdef CONFIG_RFS_ACCEL
+ .ndo_rx_flow_steer = enic_rx_flow_steer,
+#endif
};
static const struct net_device_ops enic_netdev_ops = {
@@ -2084,6 +2090,9 @@
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = enic_poll_controller,
#endif
+#ifdef CONFIG_RFS_ACCEL
+ .ndo_rx_flow_steer = enic_rx_flow_steer,
+#endif
};
static void enic_dev_deinit(struct enic *enic)
@@ -2429,6 +2438,10 @@
netdev->features |= netdev->hw_features;
+#ifdef CONFIG_RFS_ACCEL
+ netdev->hw_features |= NETIF_F_NTUPLE;
+#endif
+
if (using_dac)
netdev->features |= NETIF_F_HIGHDMA;