netdev - [PATCH net-next 4/4] r8169: enable HW csum and TSO

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Date:   Fri, 26 Jul 2019 21:51:36 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Realtek linux nic maintainers <nic_swsd@...ltek.com>,
        David Miller <davem@...emloft.net>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH net-next 4/4] r8169: enable HW csum and TSO

Enable HW csum and TSO per default except on known buggy chip versions.
Realtek confirmed that RTL8168evl has a HW issue with TSO.

Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
 drivers/net/ethernet/realtek/r8169_main.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index f77159540..61a23aee0 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -6879,11 +6879,9 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	netif_napi_add(dev, &tp->napi, rtl8169_poll, NAPI_POLL_WEIGHT);
 
-	/* don't enable SG, IP_CSUM and TSO by default - it might not work
-	 * properly for all devices */
-	dev->features |= NETIF_F_RXCSUM |
-		NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
-
+	dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO |
+		NETIF_F_RXCSUM | NETIF_F_HW_VLAN_CTAG_TX |
+		NETIF_F_HW_VLAN_CTAG_RX;
 	dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO |
 		NETIF_F_RXCSUM | NETIF_F_HW_VLAN_CTAG_TX |
 		NETIF_F_HW_VLAN_CTAG_RX;
@@ -6903,6 +6901,7 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	if (rtl_chip_supports_csum_v2(tp)) {
 		dev->hw_features |= NETIF_F_IPV6_CSUM | NETIF_F_TSO6;
+		dev->features |= NETIF_F_IPV6_CSUM | NETIF_F_TSO6;
 		dev->gso_max_size = RTL_GSO_MAX_SIZE_V2;
 		dev->gso_max_segs = RTL_GSO_MAX_SEGS_V2;
 	} else {
@@ -6910,6 +6909,13 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 		dev->gso_max_segs = RTL_GSO_MAX_SEGS_V1;
 	}
 
+	/* RTL8168e-vl has a HW issue with TSO */
+	if (tp->mac_version == RTL_GIGA_MAC_VER_34) {
+		dev->vlan_features &= ~NETIF_F_ALL_TSO;
+		dev->hw_features &= ~NETIF_F_ALL_TSO;
+		dev->features &= ~NETIF_F_ALL_TSO;
+	}
+
 	dev->hw_features |= NETIF_F_RXALL;
 	dev->hw_features |= NETIF_F_RXFCS;
 
-- 
2.22.0