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net: stmmac: Fallback to VLAN Perfect filtering if HASH is not available

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If VLAN Hash Filtering is not available we can fallback to perfect
filtering instead. Let's implement this in XGMAC and GMAC cores and let
the user use this filter.

VLAN VID=0 always passes filter so we check if more than 2 VLANs are
created and return proper error code if so because perfect filtering
only supports 1 VID at a time.

Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jose Abreu 2019-10-06 13:17:12 +02:00 committed by David S. Miller
parent 04c1b4c70d
commit c7ab0b8088
4 changed files with 40 additions and 9 deletions
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12
drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
View File

@ -733,7 +733,7 @@ static void dwmac4_set_mac_loopback(void __iomem *ioaddr, bool enable)
}
static void dwmac4_update_vlan_hash(struct mac_device_info *hw, u32 hash,
bool is_double)
u16 perfect_match, bool is_double)
{
void __iomem *ioaddr = hw->pcsr;
@ -748,6 +748,16 @@ static void dwmac4_update_vlan_hash(struct mac_device_info *hw, u32 hash,
}
writel(value, ioaddr + GMAC_VLAN_TAG);
} else if (perfect_match) {
u32 value = GMAC_VLAN_ETV;
if (is_double) {
value |= GMAC_VLAN_EDVLP;
value |= GMAC_VLAN_ESVL;
value |= GMAC_VLAN_DOVLTC;
}
writel(value | perfect_match, ioaddr + GMAC_VLAN_TAG);
} else {
u32 value = readl(ioaddr + GMAC_VLAN_TAG);

17
drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c
View File

@ -555,7 +555,7 @@ static int dwxgmac2_rss_configure(struct mac_device_info *hw,
}
static void dwxgmac2_update_vlan_hash(struct mac_device_info *hw, u32 hash,
bool is_double)
u16 perfect_match, bool is_double)
{
void __iomem *ioaddr = hw->pcsr;
@ -576,6 +576,21 @@ static void dwxgmac2_update_vlan_hash(struct mac_device_info *hw, u32 hash,
}
writel(value, ioaddr + XGMAC_VLAN_TAG);
} else if (perfect_match) {
u32 value = readl(ioaddr + XGMAC_PACKET_FILTER);
value |= XGMAC_FILTER_VTFE;
writel(value, ioaddr + XGMAC_PACKET_FILTER);
value = XGMAC_VLAN_ETV;
if (is_double) {
value |= XGMAC_VLAN_EDVLP;
value |= XGMAC_VLAN_ESVL;
value |= XGMAC_VLAN_DOVLTC;
}
writel(value | perfect_match, ioaddr + XGMAC_VLAN_TAG);
} else {
u32 value = readl(ioaddr + XGMAC_PACKET_FILTER);

2
drivers/net/ethernet/stmicro/stmmac/hwif.h
View File

@ -357,7 +357,7 @@ struct stmmac_ops {
struct stmmac_rss *cfg, u32 num_rxq);
/* VLAN */
void (*update_vlan_hash)(struct mac_device_info *hw, u32 hash,
bool is_double);
u16 perfect_match, bool is_double);
void (*enable_vlan)(struct mac_device_info *hw, u32 type);
/* TX Timestamp */
int (*get_mac_tx_timestamp)(struct mac_device_info *hw, u64 *ts);

18
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
View File

@ -4207,15 +4207,25 @@ static u32 stmmac_vid_crc32_le(__le16 vid_le)
static int stmmac_vlan_update(struct stmmac_priv *priv, bool is_double)
{
u32 crc, hash = 0;
u16 vid;
int count = 0;
u16 vid = 0;
for_each_set_bit(vid, priv->active_vlans, VLAN_N_VID) {
__le16 vid_le = cpu_to_le16(vid);
crc = bitrev32(~stmmac_vid_crc32_le(vid_le)) >> 28;
hash |= (1 << crc);
count++;
}
return stmmac_update_vlan_hash(priv, priv->hw, hash, is_double);
if (!priv->dma_cap.vlhash) {
if (count > 2) /* VID = 0 always passes filter */
return -EOPNOTSUPP;
vid = cpu_to_le16(vid);
hash = 0;
}
return stmmac_update_vlan_hash(priv, priv->hw, hash, vid, is_double);
}
static int stmmac_vlan_rx_add_vid(struct net_device *ndev, __be16 proto, u16 vid)
@ -4224,8 +4234,6 @@ static int stmmac_vlan_rx_add_vid(struct net_device *ndev, __be16 proto, u16 vid
bool is_double = false;
int ret;
if (!priv->dma_cap.vlhash)
return -EOPNOTSUPP;
if (be16_to_cpu(proto) == ETH_P_8021AD)
is_double = true;
@ -4244,8 +4252,6 @@ static int stmmac_vlan_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vi
struct stmmac_priv *priv = netdev_priv(ndev);
bool is_double = false;
if (!priv->dma_cap.vlhash)
return -EOPNOTSUPP;
if (be16_to_cpu(proto) == ETH_P_8021AD)
is_double = true;