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Message-Id: <20230330070252.12705-1-boon.khai.ng@intel.com>
Date: Thu, 30 Mar 2023 15:02:52 +0800
From: Boon Khai Ng <boon.khai.ng@...el.com>
To: "David S . Miller" <davem@...emloft.net>
Cc: linux-kernel@...r.kernel.org,
Mun Yew Tham <mun.yew.tham@...el.com>,
Tien Sung Ang <tien.sung.ang@...el.com>,
Boon Khai Ng <boon.khai.ng@...el.com>
Subject: [PATCH v1 1/8] drivers: net: stmmac_main: Add support for HW-accelerated VLAN Stripping
Currently, VLAN tag stripping is done by driver in stmmac_rx_vlan().
Add support for VLAN tag stripping by the MAC hardware for MAC drivers
that support it. This is done by adding rx_hw_vlan() and
set_hw_vlan_mode() callbacks at stmmac_ops struct which are called if
registered by the MAC driver.
This patch is applying at the higher level of the driver at stmmac_main
this will be upstreammed by IoTG team and thus it is decoupled from
the next patch.
Signed-off-by: Boon Khai Ng <boon.khai.ng@...el.com>
---
drivers/net/ethernet/stmicro/stmmac/hwif.h | 16 ++++++++++++++
.../net/ethernet/stmicro/stmmac/stmmac_main.c | 22 ++++++++++++++++++-
include/linux/stmmac.h | 1 +
3 files changed, 38 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.h b/drivers/net/ethernet/stmicro/stmmac/hwif.h
index 16a7421715cb..3a317ae87880 100644
--- a/drivers/net/ethernet/stmicro/stmmac/hwif.h
+++ b/drivers/net/ethernet/stmicro/stmmac/hwif.h
@@ -55,6 +55,10 @@ 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);
+ /* RX VLAN TCI */
+ int (*get_rx_vlan_tci)(struct dma_desc *p);
+ /* RX VLAN valid */
+ bool (*get_rx_vlan_valid)(struct dma_desc *p);
/* Return the transmit status looking at the TDES1 */
int (*tx_status)(void *data, struct stmmac_extra_stats *x,
struct dma_desc *p, void __iomem *ioaddr);
@@ -116,6 +120,10 @@ 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_tx_vlan_valid, __args)
#define stmmac_tx_status(__priv, __args...) \
stmmac_do_callback(__priv, desc, tx_status, __args)
#define stmmac_get_tx_len(__priv, __args...) \
@@ -368,6 +376,10 @@ 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 net_device *dev, struct mac_device_info *hw,
+ struct dma_desc *rx_desc, struct sk_buff *skb);
+ void (*set_hw_vlan_mode)(void __iomem *ioaddr,
+ netdev_features_t features);
int (*add_hw_vlan_rx_fltr)(struct net_device *dev,
struct mac_device_info *hw,
__be16 proto, u16 vid);
@@ -475,6 +487,10 @@ 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...) \
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 17310ade88dd..8ee595d46481 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -3421,6 +3421,10 @@ static int stmmac_hw_setup(struct net_device *dev, bool ptp_register)
stmmac_fpe_handshake(priv, true);
}
+ /* Set HW VLAN Stripping mode */
+ if (priv->plat->use_hw_vlan)
+ stmmac_set_hw_vlan_mode(priv, priv->ioaddr, dev->features);
+
return 0;
}
@@ -5399,7 +5403,14 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue)
/* Got entire packet into SKB. Finish it. */
stmmac_get_rx_hwtstamp(priv, p, np, skb);
- stmmac_rx_vlan(priv->dev, skb);
+
+ /* Switch between rx_hw_vlan or rx_vlan */
+ if (priv->plat->use_hw_vlan)
+ stmmac_rx_hw_vlan(priv, priv->dev,
+ priv->hw, p, skb);
+ else
+ stmmac_rx_vlan(priv->dev, skb);
+
skb->protocol = eth_type_trans(skb, priv->dev);
if (unlikely(!coe))
@@ -5650,6 +5661,10 @@ static int stmmac_set_features(struct net_device *netdev,
{
struct stmmac_priv *priv = netdev_priv(netdev);
+ netdev_features_t changed;
+
+ changed = netdev->features ^ features;
+
/* Keep the COE Type in case of csum is supporting */
if (features & NETIF_F_RXCSUM)
priv->hw->rx_csum = priv->plat->rx_coe;
@@ -5668,6 +5683,9 @@ static int stmmac_set_features(struct net_device *netdev,
stmmac_enable_sph(priv, priv->ioaddr, sph_en, chan);
}
+ if (changed & NETIF_F_HW_VLAN_CTAG_RX)
+ stmmac_set_hw_vlan_mode(priv, priv->ioaddr, features);
+
return 0;
}
@@ -7217,6 +7235,8 @@ 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 | NETIF_F_HW_VLAN_STAG_RX;
+
if (priv->dma_cap.vlhash) {
ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
ndev->features |= NETIF_F_HW_VLAN_STAG_FILTER;
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index a2414c187483..0f2800eada9d 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -273,5 +273,6 @@ struct plat_stmmacenet_data {
bool use_phy_wol;
bool sph_disable;
bool serdes_up_after_phy_linkup;
+ bool use_hw_vlan;
};
#endif
--
2.25.1
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