diff options
author | Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com> | 2016-07-27 09:26:17 (GMT) |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2016-08-08 22:38:27 (GMT) |
commit | 92fbb1df83ec17f62a46b23507ebb3f06ca10cd3 (patch) | |
tree | 5b7eb9d3e03805eef1b6a364b7763bc90b3dc711 /drivers | |
parent | 0aff1fbfe72e47412e3213648e972c339af30e4e (diff) | |
download | linux-92fbb1df83ec17f62a46b23507ebb3f06ca10cd3.tar.xz |
be2net: Avoid unnecessary firmware updates of multicast list
Eachtime the ndo_set_rx_mode() routine is called, the driver programs the
multicast list in the adapter without checking if there are any changes to
the list. This leads to a flood of RX_FILTER cmds when a number of vlan
interfaces are configured over the device, as the ndo_ gets
called for each vlan interface. To avoid this, we now use __dev_mc_sync()
and __dev_uc_sync() API, but only to detect if there is a change in the
mc/uc lists. Now that we use this API, the code has to be-designed to
issue these API calls for each invocation of the be_set_rx_mode() call.
Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>
Signed-off-by: Sathya Perla <sathya.perla@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/ethernet/emulex/benet/be.h | 2 | ||||
-rw-r--r-- | drivers/net/ethernet/emulex/benet/be_main.c | 169 |
2 files changed, 130 insertions, 41 deletions
diff --git a/drivers/net/ethernet/emulex/benet/be.h b/drivers/net/ethernet/emulex/benet/be.h index 4555e04..6868712 100644 --- a/drivers/net/ethernet/emulex/benet/be.h +++ b/drivers/net/ethernet/emulex/benet/be.h @@ -573,6 +573,8 @@ struct be_adapter { u32 uc_macs; /* Count of secondary UC MAC programmed */ unsigned long vids[BITS_TO_LONGS(VLAN_N_VID)]; u16 vlans_added; + bool update_uc_list; + bool update_mc_list; u32 beacon_state; /* for set_phys_id */ diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c index 243d43b..03f6f6d 100644 --- a/drivers/net/ethernet/emulex/benet/be_main.c +++ b/drivers/net/ethernet/emulex/benet/be_main.c @@ -1420,8 +1420,8 @@ static int be_vid_config(struct be_adapter *adapter) u16 num = 0, i = 0; int status = 0; - /* No need to further configure vids if in promiscuous mode */ - if (be_in_all_promisc(adapter)) + /* No need to change the VLAN state if the I/F is in promiscuous */ + if (adapter->netdev->flags & IFF_PROMISC) return 0; if (adapter->vlans_added > be_max_vlans(adapter)) @@ -1483,12 +1483,6 @@ static int be_vlan_rem_vid(struct net_device *netdev, __be16 proto, u16 vid) return be_vid_config(adapter); } -static void be_clear_all_promisc(struct be_adapter *adapter) -{ - be_cmd_rx_filter(adapter, BE_IF_FLAGS_ALL_PROMISCUOUS, OFF); - adapter->if_flags &= ~BE_IF_FLAGS_ALL_PROMISCUOUS; -} - static void be_set_all_promisc(struct be_adapter *adapter) { be_cmd_rx_filter(adapter, BE_IF_FLAGS_ALL_PROMISCUOUS, ON); @@ -1507,42 +1501,144 @@ static void be_set_mc_promisc(struct be_adapter *adapter) adapter->if_flags |= BE_IF_FLAGS_MCAST_PROMISCUOUS; } -static void be_set_mc_list(struct be_adapter *adapter) +static void be_set_uc_promisc(struct be_adapter *adapter) { int status; - status = be_cmd_rx_filter(adapter, BE_IF_FLAGS_MULTICAST, ON); + if (adapter->if_flags & BE_IF_FLAGS_PROMISCUOUS) + return; + + status = be_cmd_rx_filter(adapter, BE_IF_FLAGS_PROMISCUOUS, ON); if (!status) - adapter->if_flags &= ~BE_IF_FLAGS_MCAST_PROMISCUOUS; - else + adapter->if_flags |= BE_IF_FLAGS_PROMISCUOUS; +} + +static void be_clear_uc_promisc(struct be_adapter *adapter) +{ + int status; + + if (!(adapter->if_flags & BE_IF_FLAGS_PROMISCUOUS)) + return; + + status = be_cmd_rx_filter(adapter, BE_IF_FLAGS_PROMISCUOUS, OFF); + if (!status) + adapter->if_flags &= ~BE_IF_FLAGS_PROMISCUOUS; +} + +/* The below 2 functions are the callback args for __dev_mc_sync/dev_uc_sync(). + * We use a single callback function for both sync and unsync. We really don't + * add/remove addresses through this callback. But, we use it to detect changes + * to the uc/mc lists. The entire uc/mc list is programmed in be_set_rx_mode(). + */ +static int be_uc_list_update(struct net_device *netdev, + const unsigned char *addr) +{ + struct be_adapter *adapter = netdev_priv(netdev); + + adapter->update_uc_list = true; + return 0; +} + +static int be_mc_list_update(struct net_device *netdev, + const unsigned char *addr) +{ + struct be_adapter *adapter = netdev_priv(netdev); + + adapter->update_mc_list = true; + return 0; +} + +static void be_set_mc_list(struct be_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + bool mc_promisc = false; + int status; + + __dev_mc_sync(netdev, be_mc_list_update, be_mc_list_update); + + if (netdev->flags & IFF_PROMISC) { + adapter->update_mc_list = false; + } else if (netdev->flags & IFF_ALLMULTI || + netdev_mc_count(netdev) > be_max_mc(adapter)) { + /* Enable multicast promisc if num configured exceeds + * what we support + */ + mc_promisc = true; + adapter->update_mc_list = false; + } else if (adapter->if_flags & BE_IF_FLAGS_MCAST_PROMISCUOUS) { + /* Update mc-list unconditionally if the iface was previously + * in mc-promisc mode and now is out of that mode. + */ + adapter->update_mc_list = true; + } + + if (mc_promisc) { be_set_mc_promisc(adapter); + } else if (adapter->update_mc_list) { + status = be_cmd_rx_filter(adapter, BE_IF_FLAGS_MULTICAST, ON); + if (!status) + adapter->if_flags &= ~BE_IF_FLAGS_MCAST_PROMISCUOUS; + else + be_set_mc_promisc(adapter); + + adapter->update_mc_list = false; + } +} + +static void be_clear_mc_list(struct be_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + + __dev_mc_unsync(netdev, NULL); + be_cmd_rx_filter(adapter, BE_IF_FLAGS_MULTICAST, OFF); } static void be_set_uc_list(struct be_adapter *adapter) { + struct net_device *netdev = adapter->netdev; struct netdev_hw_addr *ha; + bool uc_promisc = false; int i = 1; /* First slot is claimed by the Primary MAC */ - for (; adapter->uc_macs > 0; adapter->uc_macs--, i++) - be_cmd_pmac_del(adapter, adapter->if_handle, - adapter->pmac_id[i], 0); + __dev_uc_sync(netdev, be_uc_list_update, be_uc_list_update); - if (netdev_uc_count(adapter->netdev) > be_max_uc(adapter)) { - be_set_all_promisc(adapter); - return; + if (netdev->flags & IFF_PROMISC) { + adapter->update_uc_list = false; + } else if (netdev_uc_count(netdev) > (be_max_uc(adapter) - 1)) { + uc_promisc = true; + adapter->update_uc_list = false; + } else if (adapter->if_flags & BE_IF_FLAGS_PROMISCUOUS) { + /* Update uc-list unconditionally if the iface was previously + * in uc-promisc mode and now is out of that mode. + */ + adapter->update_uc_list = true; } - netdev_for_each_uc_addr(ha, adapter->netdev) { - adapter->uc_macs++; /* First slot is for Primary MAC */ - be_cmd_pmac_add(adapter, (u8 *)ha->addr, adapter->if_handle, - &adapter->pmac_id[adapter->uc_macs], 0); + if (uc_promisc) { + be_set_uc_promisc(adapter); + } else if (adapter->update_uc_list) { + be_clear_uc_promisc(adapter); + + for (; adapter->uc_macs > 0; adapter->uc_macs--, i++) + be_cmd_pmac_del(adapter, adapter->if_handle, + adapter->pmac_id[i], 0); + + netdev_for_each_uc_addr(ha, adapter->netdev) { + adapter->uc_macs++; /* First slot is for Primary MAC */ + be_cmd_pmac_add(adapter, + (u8 *)ha->addr, adapter->if_handle, + &adapter->pmac_id[adapter->uc_macs], 0); + } + adapter->update_uc_list = false; } } static void be_clear_uc_list(struct be_adapter *adapter) { + struct net_device *netdev = adapter->netdev; int i; + __dev_uc_unsync(netdev, NULL); for (i = 1; i < (adapter->uc_macs + 1); i++) be_cmd_pmac_del(adapter, adapter->if_handle, adapter->pmac_id[i], 0); @@ -1554,27 +1650,17 @@ static void be_set_rx_mode(struct net_device *netdev) struct be_adapter *adapter = netdev_priv(netdev); if (netdev->flags & IFF_PROMISC) { - be_set_all_promisc(adapter); - return; - } - - /* Interface was previously in promiscuous mode; disable it */ - if (be_in_all_promisc(adapter)) { - be_clear_all_promisc(adapter); - if (adapter->vlans_added) - be_vid_config(adapter); - } - - /* Enable multicast promisc if num configured exceeds what we support */ - if (netdev->flags & IFF_ALLMULTI || - netdev_mc_count(netdev) > be_max_mc(adapter)) { - be_set_mc_promisc(adapter); - return; + if (!be_in_all_promisc(adapter)) + be_set_all_promisc(adapter); + } else if (be_in_all_promisc(adapter)) { + /* We need to re-program the vlan-list or clear + * vlan-promisc mode (if needed) when the interface + * comes out of promisc mode. + */ + be_vid_config(adapter); } - if (netdev_uc_count(netdev) != adapter->uc_macs) - be_set_uc_list(adapter); - + be_set_uc_list(adapter); be_set_mc_list(adapter); } @@ -3426,6 +3512,7 @@ static void be_disable_if_filters(struct be_adapter *adapter) adapter->pmac_id[0], 0); be_clear_uc_list(adapter); + be_clear_mc_list(adapter); /* The IFACE flags are enabled in the open path and cleared * in the close path. When a VF gets detached from the host and |