netdev - [PATCH 2/5] ibmveth: Add support for TSO

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1429043704-22552-2-git-send-email-tlfalcon@linux.vnet.ibm.com>
Date:	Tue, 14 Apr 2015 15:35:01 -0500
From:	Thomas Falcon <tlfalcon@...ux.vnet.ibm.com>
To:	netdev@...r.kernel.org
Cc:	linuxppc-dev@...ts.ozlabs.org,
	Brian King <brking@...ux.vnet.ibm.com>
Subject: [PATCH 2/5] ibmveth: Add support for TSO

Add support for TSO.  TSO is turned off by default and
must be enabled and configured by the user.  The driver
version number is increased so that users can be sure
that they are using ibmveth with TSO support.

Cc: Brian King <brking@...ux.vnet.ibm.com>
Signed-off-by: Thomas Falcon <tlfalcon@...ux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ibmveth.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/ibm/ibmveth.c b/drivers/net/ethernet/ibm/ibmveth.c
index 0210622..2911a57 100644
--- a/drivers/net/ethernet/ibm/ibmveth.c
+++ b/drivers/net/ethernet/ibm/ibmveth.c
@@ -58,7 +58,7 @@ static struct kobj_type ktype_veth_pool;
 
 static const char ibmveth_driver_name[] = "ibmveth";
 static const char ibmveth_driver_string[] = "IBM Power Virtual Ethernet Driver";
-#define ibmveth_driver_version "1.04"
+#define ibmveth_driver_version "1.05"
 
 MODULE_AUTHOR("Santiago Leon <santil@...ux.vnet.ibm.com>");
 MODULE_DESCRIPTION("IBM Power Virtual Ethernet Driver");
@@ -852,6 +852,10 @@ static int ibmveth_set_features(struct net_device *dev,
 	struct ibmveth_adapter *adapter = netdev_priv(dev);
 	int rx_csum = !!(features & NETIF_F_RXCSUM);
 	int rc;
+	netdev_features_t changed = features ^ dev->features;
+
+	if (features & NETIF_F_TSO & changed)
+		netdev_info(dev, "TSO feature requires all partitions to have updated driver");
 
 	if (rx_csum == adapter->rx_csum)
 		return 0;
@@ -1035,6 +1039,14 @@ retry_bounce:
 		descs[i+1].fields.address = dma_addr;
 	}
 
+	if (skb_is_gso(skb) && !skb_is_gso_v6(skb)) {
+		/* Put -1 in the IP checksum to tell phyp it
+		 *  is a largesend packet and put the mss in the TCP checksum.
+		 */
+		ip_hdr(skb)->check = 0xffff;
+		tcp_hdr(skb)->check = cpu_to_be16(skb_shinfo(skb)->gso_size);
+	}
+
 	if (ibmveth_send(adapter, descs)) {
 		adapter->tx_send_failed++;
 		netdev->stats.tx_dropped++;
@@ -1422,6 +1434,9 @@ static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
 		NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
 	netdev->features |= netdev->hw_features;
 
+	/* TSO is disabled by default */
+	netdev->hw_features |= NETIF_F_TSO;
+
 	memcpy(netdev->dev_addr, mac_addr_p, ETH_ALEN);
 
 	if (firmware_has_feature(FW_FEATURE_CMO))
-- 
1.8.3.1

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html