From 8a07a22d856f37e580557c1a13c8eb8662f9cc11 Mon Sep 17 00:00:00 2001 From: Greg Rose Date: Wed, 5 May 2010 19:57:30 +0000 Subject: [PATCH] ixgbe: Streamline MC filter setup for VFs The driver was calling the set Rx mode function for every multicast filter set by the VF. When starting many VMs where each might have multiple VLAN interfaces this would result in the function being called hundreds or even thousands of times. This is unnecessary for the case of the imperfect filters used in the MTA and has been streamlined to be more efficient. Signed-off-by: Greg Rose Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/ixgbe/ixgbe_sriov.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/net/ixgbe/ixgbe_sriov.c b/drivers/net/ixgbe/ixgbe_sriov.c index c4e5150a27eb..f6cee94ec8e8 100644 --- a/drivers/net/ixgbe/ixgbe_sriov.c +++ b/drivers/net/ixgbe/ixgbe_sriov.c @@ -48,7 +48,11 @@ int ixgbe_set_vf_multicasts(struct ixgbe_adapter *adapter, int entries, u16 *hash_list, u32 vf) { struct vf_data_storage *vfinfo = &adapter->vfinfo[vf]; + struct ixgbe_hw *hw = &adapter->hw; int i; + u32 vector_bit; + u32 vector_reg; + u32 mta_reg; /* only so many hash values supported */ entries = min(entries, IXGBE_MAX_VF_MC_ENTRIES); @@ -68,8 +72,13 @@ int ixgbe_set_vf_multicasts(struct ixgbe_adapter *adapter, vfinfo->vf_mc_hashes[i] = hash_list[i];; } - /* Flush and reset the mta with the new values */ - ixgbe_set_rx_mode(adapter->netdev); + for (i = 0; i < vfinfo->num_vf_mc_hashes; i++) { + vector_reg = (vfinfo->vf_mc_hashes[i] >> 5) & 0x7F; + vector_bit = vfinfo->vf_mc_hashes[i] & 0x1F; + mta_reg = IXGBE_READ_REG(hw, IXGBE_MTA(vector_reg)); + mta_reg |= (1 << vector_bit); + IXGBE_WRITE_REG(hw, IXGBE_MTA(vector_reg), mta_reg); + } return 0; } -- 2.30.2