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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d 
 kernel/drivers/net/ethernet/ibm/ibmveth.c
....@@ -1,18 +1,6 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  * IBM Power Virtual Ethernet Device Driver
3
- *
4
- * This program is free software; you can redistribute it and/or modify
5
- * it under the terms of the GNU General Public License as published by
6
- * the Free Software Foundation; either version 2 of the License, or
7
- * (at your option) any later version.
8
- *
9
- * This program is distributed in the hope that it will be useful,
10
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
11
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
13
- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, see <http://www.gnu.org/licenses/>.
164  *
175  * Copyright (C) IBM Corporation, 2003, 2010
186  *
....@@ -24,7 +12,6 @@
2412  */
2513 
2614 #include <linux/module.h>
27
-#include <linux/moduleparam.h>
2815 #include <linux/types.h>
2916 #include <linux/errno.h>
3017 #include <linux/dma-mapping.h>
....@@ -94,7 +81,7 @@
9481 #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat)
9582 #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off))
9683 
97
-struct ibmveth_stat ibmveth_stats[] = {
84
+static struct ibmveth_stat ibmveth_stats[] = {
9885 	{ "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) },
9986 	{ "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) },
10087 	{ "replenish_add_buff_failure",
....@@ -725,27 +712,34 @@
725712 	return 0;
726713 }
727714 
728
-static int netdev_get_link_ksettings(struct net_device *dev,
729
-				     struct ethtool_link_ksettings *cmd)
715
+static int ibmveth_set_link_ksettings(struct net_device *dev,
716
+				      const struct ethtool_link_ksettings *cmd)
730717 {
731
-	u32 supported, advertising;
718
+	struct ibmveth_adapter *adapter = netdev_priv(dev);
732719 
733
-	supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
734
-				SUPPORTED_FIBRE);
735
-	advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
736
-				ADVERTISED_FIBRE);
737
-	cmd->base.speed = SPEED_1000;
738
-	cmd->base.duplex = DUPLEX_FULL;
739
-	cmd->base.port = PORT_FIBRE;
740
-	cmd->base.phy_address = 0;
741
-	cmd->base.autoneg = AUTONEG_ENABLE;
720
+	return ethtool_virtdev_set_link_ksettings(dev, cmd,
721
+						  &adapter->speed,
722
+						  &adapter->duplex);
723
+}
742724 
743
-	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
744
-						supported);
745
-	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
746
-						advertising);
725
+static int ibmveth_get_link_ksettings(struct net_device *dev,
726
+				      struct ethtool_link_ksettings *cmd)
727
+{
728
+	struct ibmveth_adapter *adapter = netdev_priv(dev);
729
+
730
+	cmd->base.speed = adapter->speed;
731
+	cmd->base.duplex = adapter->duplex;
732
+	cmd->base.port = PORT_OTHER;
747733 
748734 	return 0;
735
+}
736
+
737
+static void ibmveth_init_link_settings(struct net_device *dev)
738
+{
739
+	struct ibmveth_adapter *adapter = netdev_priv(dev);
740
+
741
+	adapter->speed = SPEED_1000;
742
+	adapter->duplex = DUPLEX_FULL;
749743 }
750744 
751745 static void netdev_get_drvinfo(struct net_device *dev,
....@@ -978,20 +972,19 @@
978972 }
979973 
980974 static const struct ethtool_ops netdev_ethtool_ops = {
981
-	.get_drvinfo		= netdev_get_drvinfo,
982
-	.get_link		= ethtool_op_get_link,
983
-	.get_strings		= ibmveth_get_strings,
984
-	.get_sset_count		= ibmveth_get_sset_count,
985
-	.get_ethtool_stats	= ibmveth_get_ethtool_stats,
986
-	.get_link_ksettings	= netdev_get_link_ksettings,
975
+	.get_drvinfo		         = netdev_get_drvinfo,
976
+	.get_link		         = ethtool_op_get_link,
977
+	.get_strings		         = ibmveth_get_strings,
978
+	.get_sset_count		         = ibmveth_get_sset_count,
979
+	.get_ethtool_stats	         = ibmveth_get_ethtool_stats,
980
+	.get_link_ksettings	         = ibmveth_get_link_ksettings,
981
+	.set_link_ksettings              = ibmveth_set_link_ksettings,
987982 };
988983 
989984 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
990985 {
991986 	return -EOPNOTSUPP;
992987 }
993
-
994
-#define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
995988 
996989 static int ibmveth_send(struct ibmveth_adapter *adapter,
997990 			union ibmveth_buf_desc *descs, unsigned long mss)
....@@ -1024,6 +1017,23 @@
10241017 	return 0;
10251018 }
10261019 
1020
+static int ibmveth_is_packet_unsupported(struct sk_buff *skb,
1021
+					 struct net_device *netdev)
1022
+{
1023
+	struct ethhdr *ether_header;
1024
+	int ret = 0;
1025
+
1026
+	ether_header = eth_hdr(skb);
1027
+
1028
+	if (ether_addr_equal(ether_header->h_dest, netdev->dev_addr)) {
1029
+		netdev_dbg(netdev, "veth doesn't support loopback packets, dropping packet.\n");
1030
+		netdev->stats.tx_dropped++;
1031
+		ret = -EOPNOTSUPP;
1032
+	}
1033
+
1034
+	return ret;
1035
+}
1036
+
10271037 static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb,
10281038 				      struct net_device *netdev)
10291039 {
....@@ -1034,6 +1044,9 @@
10341044 	int force_bounce = 0;
10351045 	dma_addr_t dma_addr;
10361046 	unsigned long mss = 0;
1047
+
1048
+	if (ibmveth_is_packet_unsupported(skb, netdev))
1049
+		goto out;
10371050 
10381051 	/* veth doesn't handle frag_list, so linearize the skb.
10391052 	 * When GRO is enabled SKB's can have frag_list.
....@@ -1672,6 +1685,7 @@
16721685 	adapter->netdev = netdev;
16731686 	adapter->mcastFilterSize = be32_to_cpu(*mcastFilterSize_p);
16741687 	adapter->pool_config = 0;
1688
+	ibmveth_init_link_settings(netdev);
16751689 
16761690 	netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
16771691