igb/igbvf: Add VF MAC filter request capabilities

Add functionality for the VF to request up to 3 additional MAC filters.
This is done using existing E1000_VF_SET_MAC_ADDR message, but with
additional message info - E1000_VF_MAC_FILTER_CLR to clear all unicast
MAC filters previously set for this VF and E1000_VF_MAC_FILTER_ADD to
add MAC filter.

Additional filters can be added only in case if administrator did not
set VF MAC explicitly and allowed to change default MAC to the VF.

Due to the limited number of RAR entries reserve at least 3 MAC filters
for the PF.

If SRIOV is supported by the NIC after this change RAR entries starting
from 1 to (RAR MAX ENTRIES - NUM SRIOV VFS) will be used for PF and VF
MAC filters.

Signed-off-by: Yury Kylulin <yury.kylulin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 41 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/igbvf/vf.c b/drivers/net/ethernet/intel/igbvf/vf.c
index 335ba6642145..528be116184e 100644
--- a/drivers/net/ethernet/intel/igbvf/vf.c
+++ b/drivers/net/ethernet/intel/igbvf/vf.c
@@ -36,6 +36,7 @@ static void e1000_update_mc_addr_list_vf(struct e1000_hw *hw, u8 *,
 					 u32, u32, u32);
 static void e1000_rar_set_vf(struct e1000_hw *, u8 *, u32);
 static s32 e1000_read_mac_addr_vf(struct e1000_hw *);
+static s32 e1000_set_uc_addr_vf(struct e1000_hw *hw, u32 subcmd, u8 *addr);
 static s32 e1000_set_vfta_vf(struct e1000_hw *, u16, bool);
 
 /**
@@ -66,6 +67,8 @@ static s32 e1000_init_mac_params_vf(struct e1000_hw *hw)
 	mac->ops.rar_set = e1000_rar_set_vf;
 	/* read mac address */
 	mac->ops.read_mac_addr = e1000_read_mac_addr_vf;
+	/* set mac filter */
+	mac->ops.set_uc_addr = e1000_set_uc_addr_vf;
 	/* set vlan filter table array */
 	mac->ops.set_vfta = e1000_set_vfta_vf;
 
@@ -338,6 +341,44 @@ static s32 e1000_read_mac_addr_vf(struct e1000_hw *hw)
 }
 
 /**
+ *  e1000_set_uc_addr_vf - Set or clear unicast filters
+ *  @hw: pointer to the HW structure
+ *  @sub_cmd: add or clear filters
+ *  @addr: pointer to the filter MAC address
+ **/
+static s32 e1000_set_uc_addr_vf(struct e1000_hw *hw, u32 sub_cmd, u8 *addr)
+{
+	struct e1000_mbx_info *mbx = &hw->mbx;
+	u32 msgbuf[3], msgbuf_chk;
+	u8 *msg_addr = (u8 *)(&msgbuf[1]);
+	s32 ret_val;
+
+	memset(msgbuf, 0, sizeof(msgbuf));
+	msgbuf[0] |= sub_cmd;
+	msgbuf[0] |= E1000_VF_SET_MAC_ADDR;
+	msgbuf_chk = msgbuf[0];
+
+	if (addr)
+		memcpy(msg_addr, addr, ETH_ALEN);
+
+	ret_val = mbx->ops.write_posted(hw, msgbuf, 3);
+
+	if (!ret_val)
+		ret_val = mbx->ops.read_posted(hw, msgbuf, 3);
+
+	msgbuf[0] &= ~E1000_VT_MSGTYPE_CTS;
+
+	if (!ret_val) {
+		msgbuf[0] &= ~E1000_VT_MSGTYPE_CTS;
+
+		if (msgbuf[0] == (msgbuf_chk | E1000_VT_MSGTYPE_NACK))
+			return -ENOSPC;
+	}
+
+	return ret_val;
+}
+
+/**
  *  e1000_check_for_link_vf - Check for link for a virtual interface
  *  @hw: pointer to the HW structure
  *