netdev - [PATCH v4 net-next 13/21] net: usb: aqc111: Add support for TSO

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Message-ID: <eb7f3fd68f538a9806290cdfd526b474083910b9.1543224254.git.igor.russkikh@aquantia.com>
Date:   Mon, 26 Nov 2018 09:33:28 +0000
From:   Igor Russkikh <Igor.Russkikh@...antia.com>
To:     "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "andrew@...n.ch" <andrew@...n.ch>,
        Dmitry Bezrukov <Dmitry.Bezrukov@...antia.com>,
        Igor Russkikh <Igor.Russkikh@...antia.com>
Subject: [PATCH v4 net-next 13/21] net: usb: aqc111: Add support for TSO

From: Dmitry Bezrukov <dmitry.bezrukov@...antia.com>

Signed-off-by: Dmitry Bezrukov <dmitry.bezrukov@...antia.com>
Signed-off-by: Igor Russkikh <igor.russkikh@...antia.com>
---
 drivers/net/usb/aqc111.c | 6 ++++++
 drivers/net/usb/aqc111.h | 8 ++++++--
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/net/usb/aqc111.c b/drivers/net/usb/aqc111.c
index 7b69d0a5fc4c..fce2a4f65122 100644
--- a/drivers/net/usb/aqc111.c
+++ b/drivers/net/usb/aqc111.c
@@ -395,6 +395,8 @@ static int aqc111_bind(struct usbnet *dev, struct usb_interface *intf)
 	dev->net->hw_features |= AQ_SUPPORT_HW_FEATURE;
 	dev->net->features |= AQ_SUPPORT_FEATURE;
 
+	netif_set_gso_max_size(dev->net, 65535);
+
 	aqc111_read_fw_version(dev, aqc111_data);
 	aqc111_data->autoneg = AUTONEG_ENABLE;
 	aqc111_data->advertised_speed = (usb_speed == USB_SPEED_SUPER) ?
@@ -832,6 +834,10 @@ static struct sk_buff *aqc111_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
 	/*Length of actual data*/
 	tx_desc |= skb->len & AQ_TX_DESC_LEN_MASK;
 
+	/* TSO MSS */
+	tx_desc |= ((u64)(skb_shinfo(skb)->gso_size & AQ_TX_DESC_MSS_MASK)) <<
+		   AQ_TX_DESC_MSS_SHIFT;
+
 	headroom = (skb->len + sizeof(tx_desc)) % 8;
 	if (headroom != 0)
 		padding_size = 8 - headroom;
diff --git a/drivers/net/usb/aqc111.h b/drivers/net/usb/aqc111.h
index 165cdb8b022c..a7a333914461 100644
--- a/drivers/net/usb/aqc111.h
+++ b/drivers/net/usb/aqc111.h
@@ -22,10 +22,12 @@
 
 /* Feature. ********************************************/
 #define AQ_SUPPORT_FEATURE	(NETIF_F_SG | NETIF_F_IP_CSUM |\
-				 NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM)
+				 NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM |\
+				 NETIF_F_TSO)
 
 #define AQ_SUPPORT_HW_FEATURE	(NETIF_F_SG | NETIF_F_IP_CSUM |\
-				 NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM)
+				 NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM |\
+				 NETIF_F_TSO)
 
 /* SFR Reg. ********************************************/
 
@@ -162,6 +164,8 @@ struct aqc111_data {
 /* TX Descriptor */
 #define AQ_TX_DESC_LEN_MASK	0x1FFFFF
 #define AQ_TX_DESC_DROP_PADD	BIT(28)
+#define AQ_TX_DESC_MSS_MASK	0x7FFF
+#define AQ_TX_DESC_MSS_SHIFT	0x20
 
 #define AQ_RX_HW_PAD			0x02
 
-- 
2.17.1