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net: stmmac: Add support for HW-accelerated VLAN stripping

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Current implementation supports driver level VLAN tag stripping only.
The features is always on if CONFIG_VLAN_8021Q is enabled in kernel
config and is not user configurable.

This patch add support to MAC level VLAN tag stripping and can be
configured through ethtool. If the rx-vlan-offload is off, the VLAN tag
will be stripped by driver. If the rx-vlan-offload is on, the VLAN tag
will be stripped by MAC.

Command: ethtool -K <interface> rx-vlan-offload off | on

Signed-off-by: Lai Peter Jun Ann <jun.ann.lai@intel.com>
Signed-off-by: Gan, Yi Fang <yi.fang.gan@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gan, Yi Fang 2023-11-21 13:38:42 +08:00 • committed by David S. Miller
parent 36b20fcdd9
commit 750011e239
5 changed files with 90 additions and 2 deletions
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1
drivers/net/ethernet/stmicro/stmmac/common.h
View file

@ -580,6 +580,7 @@ struct mac_device_info {
u32 vlan_filter[32];
bool vlan_fail_q_en;
u8 vlan_fail_q;
bool hw_vlan_en;
};
struct stmmac_rx_routing {

35
drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
View file

@ -1134,6 +1134,35 @@ static int dwmac4_config_l4_filter(struct mac_device_info *hw, u32 filter_no,
return 0;
}
static void dwmac4_rx_hw_vlan(struct mac_device_info *hw,
struct dma_desc *rx_desc, struct sk_buff *skb)
{
if (hw->desc->get_rx_vlan_valid(rx_desc)) {
u16 vid = hw->desc->get_rx_vlan_tci(rx_desc);
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
}
}
static void dwmac4_set_hw_vlan_mode(struct mac_device_info *hw)
{
void __iomem *ioaddr = hw->pcsr;
u32 value = readl(ioaddr + GMAC_VLAN_TAG);
value &= ~GMAC_VLAN_TAG_CTRL_EVLS_MASK;
if (hw->hw_vlan_en)
/* Always strip VLAN on Receive */
value |= GMAC_VLAN_TAG_STRIP_ALL;
else
/* Do not strip VLAN on Receive */
value |= GMAC_VLAN_TAG_STRIP_NONE;
/* Enable outer VLAN Tag in Rx DMA descriptor */
value |= GMAC_VLAN_TAG_CTRL_EVLRXS;
writel(value, ioaddr + GMAC_VLAN_TAG);
}
const struct stmmac_ops dwmac4_ops = {
.core_init = dwmac4_core_init,
.phylink_get_caps = dwmac4_phylink_get_caps,
@ -1175,6 +1204,8 @@ const struct stmmac_ops dwmac4_ops = {
.add_hw_vlan_rx_fltr = dwmac4_add_hw_vlan_rx_fltr,
.del_hw_vlan_rx_fltr = dwmac4_del_hw_vlan_rx_fltr,
.restore_hw_vlan_rx_fltr = dwmac4_restore_hw_vlan_rx_fltr,
.rx_hw_vlan = dwmac4_rx_hw_vlan,
.set_hw_vlan_mode = dwmac4_set_hw_vlan_mode,
};
const struct stmmac_ops dwmac410_ops = {
@ -1224,6 +1255,8 @@ const struct stmmac_ops dwmac410_ops = {
.add_hw_vlan_rx_fltr = dwmac4_add_hw_vlan_rx_fltr,
.del_hw_vlan_rx_fltr = dwmac4_del_hw_vlan_rx_fltr,
.restore_hw_vlan_rx_fltr = dwmac4_restore_hw_vlan_rx_fltr,
.rx_hw_vlan = dwmac4_rx_hw_vlan,
.set_hw_vlan_mode = dwmac4_set_hw_vlan_mode,
};
const struct stmmac_ops dwmac510_ops = {
@ -1277,6 +1310,8 @@ const struct stmmac_ops dwmac510_ops = {
.add_hw_vlan_rx_fltr = dwmac4_add_hw_vlan_rx_fltr,
.del_hw_vlan_rx_fltr = dwmac4_del_hw_vlan_rx_fltr,
.restore_hw_vlan_rx_fltr = dwmac4_restore_hw_vlan_rx_fltr,
.rx_hw_vlan = dwmac4_rx_hw_vlan,
.set_hw_vlan_mode = dwmac4_set_hw_vlan_mode,
};
static u32 dwmac4_get_num_vlan(void __iomem *ioaddr)

13
drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c
View file

@ -198,6 +198,17 @@ static int dwmac4_get_tx_ls(struct dma_desc *p)
>> TDES3_LAST_DESCRIPTOR_SHIFT;
}
static u16 dwmac4_wrback_get_rx_vlan_tci(struct dma_desc *p)
{
return (le32_to_cpu(p->des0) & RDES0_VLAN_TAG_MASK);
}
static bool dwmac4_wrback_get_rx_vlan_valid(struct dma_desc *p)
{
return ((le32_to_cpu(p->des3) & RDES3_LAST_DESCRIPTOR) &&
(le32_to_cpu(p->des3) & RDES3_RDES0_VALID));
}
static int dwmac4_wrback_get_rx_frame_len(struct dma_desc *p, int rx_coe)
{
return (le32_to_cpu(p->des3) & RDES3_PACKET_SIZE_MASK);
@ -551,6 +562,8 @@ const struct stmmac_desc_ops dwmac4_desc_ops = {
.set_tx_owner = dwmac4_set_tx_owner,
.set_rx_owner = dwmac4_set_rx_owner,
.get_tx_ls = dwmac4_get_tx_ls,
.get_rx_vlan_tci = dwmac4_wrback_get_rx_vlan_tci,
.get_rx_vlan_valid = dwmac4_wrback_get_rx_vlan_valid,
.get_rx_frame_len = dwmac4_wrback_get_rx_frame_len,
.enable_tx_timestamp = dwmac4_rd_enable_tx_timestamp,
.get_tx_timestamp_status = dwmac4_wrback_get_tx_timestamp_status,

15
drivers/net/ethernet/stmicro/stmmac/hwif.h
View file

@ -56,6 +56,10 @@ struct stmmac_desc_ops {
void (*set_tx_ic)(struct dma_desc *p);
/* Last tx segment reports the transmit status */
int (*get_tx_ls)(struct dma_desc *p);
/* Get the tag of the descriptor */
u16 (*get_rx_vlan_tci)(struct dma_desc *p);
/* Get the valid status of descriptor */
bool (*get_rx_vlan_valid)(struct dma_desc *p);
/* Return the transmit status looking at the TDES1 */
int (*tx_status)(struct stmmac_extra_stats *x,
struct dma_desc *p, void __iomem *ioaddr);
@ -117,6 +121,10 @@ struct stmmac_desc_ops {
stmmac_do_void_callback(__priv, desc, set_tx_ic, __args)
#define stmmac_get_tx_ls(__priv, __args...) \
stmmac_do_callback(__priv, desc, get_tx_ls, __args)
#define stmmac_get_rx_vlan_tci(__priv, __args...) \
stmmac_do_callback(__priv, desc, get_rx_vlan_tci, __args)
#define stmmac_get_rx_vlan_valid(__priv, __args...) \
stmmac_do_callback(__priv, desc, get_rx_vlan_valid, __args)
#define stmmac_tx_status(__priv, __args...) \
stmmac_do_callback(__priv, desc, tx_status, __args)
#define stmmac_get_tx_len(__priv, __args...) \
@ -388,6 +396,9 @@ struct stmmac_ops {
void (*update_vlan_hash)(struct mac_device_info *hw, u32 hash,
__le16 perfect_match, bool is_double);
void (*enable_vlan)(struct mac_device_info *hw, u32 type);
void (*rx_hw_vlan)(struct mac_device_info *hw, struct dma_desc *rx_desc,
struct sk_buff *skb);
void (*set_hw_vlan_mode)(struct mac_device_info *hw);
int (*add_hw_vlan_rx_fltr)(struct net_device *dev,
struct mac_device_info *hw,
__be16 proto, u16 vid);
@ -497,6 +508,10 @@ struct stmmac_ops {
stmmac_do_void_callback(__priv, mac, update_vlan_hash, __args)
#define stmmac_enable_vlan(__priv, __args...) \
stmmac_do_void_callback(__priv, mac, enable_vlan, __args)
#define stmmac_rx_hw_vlan(__priv, __args...) \
stmmac_do_void_callback(__priv, mac, rx_hw_vlan, __args)
#define stmmac_set_hw_vlan_mode(__priv, __args...) \
stmmac_do_void_callback(__priv, mac, set_hw_vlan_mode, __args)
#define stmmac_add_hw_vlan_rx_fltr(__priv, __args...) \
stmmac_do_callback(__priv, mac, add_hw_vlan_rx_fltr, __args)
#define stmmac_del_hw_vlan_rx_fltr(__priv, __args...) \

28
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
View file

@ -3469,6 +3469,8 @@ static int stmmac_hw_setup(struct net_device *dev, bool ptp_register)
/* Start the ball rolling... */
stmmac_start_all_dma(priv);
stmmac_set_hw_vlan_mode(priv, priv->hw);
if (priv->dma_cap.fpesel) {
stmmac_fpe_start_wq(priv);
@ -4993,7 +4995,12 @@ static void stmmac_dispatch_skb_zc(struct stmmac_priv *priv, u32 queue,
}
stmmac_get_rx_hwtstamp(priv, p, np, skb);
stmmac_rx_vlan(priv->dev, skb);
if (priv->hw->hw_vlan_en)
/* MAC level stripping. */
stmmac_rx_hw_vlan(priv, priv->hw, p, skb);
else
/* Driver level stripping. */
stmmac_rx_vlan(priv->dev, skb);
skb->protocol = eth_type_trans(skb, priv->dev);
if (unlikely(!coe))
@ -5509,7 +5516,14 @@ drain_data:
/* Got entire packet into SKB. Finish it. */
stmmac_get_rx_hwtstamp(priv, p, np, skb);
stmmac_rx_vlan(priv->dev, skb);
if (priv->hw->hw_vlan_en)
/* MAC level stripping. */
stmmac_rx_hw_vlan(priv, priv->hw, p, skb);
else
/* Driver level stripping. */
stmmac_rx_vlan(priv->dev, skb);
skb->protocol = eth_type_trans(skb, priv->dev);
if (unlikely(!coe))
@ -5818,6 +5832,13 @@ static int stmmac_set_features(struct net_device *netdev,
stmmac_enable_sph(priv, priv->ioaddr, sph_en, chan);
}
if (features & NETIF_F_HW_VLAN_CTAG_RX)
priv->hw->hw_vlan_en = true;
else
priv->hw->hw_vlan_en = false;
stmmac_set_hw_vlan_mode(priv, priv->hw);
return 0;
}
@ -7509,6 +7530,9 @@ int stmmac_dvr_probe(struct device *device,
#ifdef STMMAC_VLAN_TAG_USED
/* Both mac100 and gmac support receive VLAN tag detection */
ndev->features |= NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_STAG_RX;
ndev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
priv->hw->hw_vlan_en = true;
if (priv->dma_cap.vlhash) {
ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
ndev->features |= NETIF_F_HW_VLAN_STAG_FILTER;