amd-xgbe: Add support for VLAN filtering

This patch adds support for (imperfect) filtering of
VLAN tag ids using a 16-bit filter hash table.  When
VLANs are added, a 4-bit hash is calculated with the
result indicating the bit in the hash table to set.
This table is used by the hardware to drop packets with
a VLAN id that does not hash to a set bit in the table.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/amd/xgbe/xgbe-common.h

@@ -393,6 +393,8 @@
 #define MAC_PFR_PM_WIDTH		1
 #define MAC_PFR_PR_INDEX		0
 #define MAC_PFR_PR_WIDTH		1
+#define MAC_PFR_VTFE_INDEX		16
+#define MAC_PFR_VTFE_WIDTH		1
 #define MAC_PMTCSR_MGKPKTEN_INDEX	1
 #define MAC_PMTCSR_MGKPKTEN_WIDTH	1
 #define MAC_PMTCSR_PWRDWN_INDEX		0
@@ -427,6 +429,8 @@
 #define MAC_TCR_SS_WIDTH		2
 #define MAC_TCR_TE_INDEX		0
 #define MAC_TCR_TE_WIDTH		1
+#define MAC_VLANHTR_VLHT_INDEX		0
+#define MAC_VLANHTR_VLHT_WIDTH		16
 #define MAC_VLANIR_VLTI_INDEX		20
 #define MAC_VLANIR_VLTI_WIDTH		1
 #define MAC_VLANIR_CSVL_INDEX		19
@@ -437,10 +441,18 @@
 #define MAC_VLANTR_ERSVLM_WIDTH		1
 #define MAC_VLANTR_ESVL_INDEX		18
 #define MAC_VLANTR_ESVL_WIDTH		1
+#define MAC_VLANTR_ETV_INDEX		16
+#define MAC_VLANTR_ETV_WIDTH		1
 #define MAC_VLANTR_EVLS_INDEX		21
 #define MAC_VLANTR_EVLS_WIDTH		2
 #define MAC_VLANTR_EVLRXS_INDEX		24
 #define MAC_VLANTR_EVLRXS_WIDTH		1
+#define MAC_VLANTR_VL_INDEX		0
+#define MAC_VLANTR_VL_WIDTH		16
+#define MAC_VLANTR_VTHM_INDEX		25
+#define MAC_VLANTR_VTHM_WIDTH		1
+#define MAC_VLANTR_VTIM_INDEX		17
+#define MAC_VLANTR_VTIM_WIDTH		1
 #define MAC_VR_DEVID_INDEX		8
 #define MAC_VR_DEVID_WIDTH		8
 #define MAC_VR_SNPSVER_INDEX		0