v4.19.13 snapshot.
diff --git a/drivers/net/ethernet/sun/sunvnet.c b/drivers/net/ethernet/sun/sunvnet.c
new file mode 100644
index 0000000..12539b3
--- /dev/null
+++ b/drivers/net/ethernet/sun/sunvnet.c
@@ -0,0 +1,568 @@
+// SPDX-License-Identifier: GPL-2.0
+/* sunvnet.c: Sun LDOM Virtual Network Driver.
+ *
+ * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
+ * Copyright (C) 2016-2017 Oracle. All rights reserved.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/ethtool.h>
+#include <linux/etherdevice.h>
+#include <linux/mutex.h>
+#include <linux/highmem.h>
+#include <linux/if_vlan.h>
+
+#if IS_ENABLED(CONFIG_IPV6)
+#include <linux/icmpv6.h>
+#endif
+
+#include <net/ip.h>
+#include <net/icmp.h>
+#include <net/route.h>
+
+#include <asm/vio.h>
+#include <asm/ldc.h>
+
+#include "sunvnet_common.h"
+
+/* length of time before we decide the hardware is borked,
+ * and dev->tx_timeout() should be called to fix the problem
+ */
+#define VNET_TX_TIMEOUT (5 * HZ)
+
+#define DRV_MODULE_NAME "sunvnet"
+#define DRV_MODULE_VERSION "2.0"
+#define DRV_MODULE_RELDATE "February 3, 2017"
+
+static char version[] =
+ DRV_MODULE_NAME " " DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")";
+MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
+MODULE_DESCRIPTION("Sun LDOM virtual network driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_MODULE_VERSION);
+
+/* Ordered from largest major to lowest */
+static struct vio_version vnet_versions[] = {
+ { .major = 1, .minor = 8 },
+ { .major = 1, .minor = 7 },
+ { .major = 1, .minor = 6 },
+ { .major = 1, .minor = 0 },
+};
+
+static void vnet_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *info)
+{
+ strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
+ strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
+}
+
+static u32 vnet_get_msglevel(struct net_device *dev)
+{
+ struct vnet *vp = netdev_priv(dev);
+
+ return vp->msg_enable;
+}
+
+static void vnet_set_msglevel(struct net_device *dev, u32 value)
+{
+ struct vnet *vp = netdev_priv(dev);
+
+ vp->msg_enable = value;
+}
+
+static const struct {
+ const char string[ETH_GSTRING_LEN];
+} ethtool_stats_keys[] = {
+ { "rx_packets" },
+ { "tx_packets" },
+ { "rx_bytes" },
+ { "tx_bytes" },
+ { "rx_errors" },
+ { "tx_errors" },
+ { "rx_dropped" },
+ { "tx_dropped" },
+ { "multicast" },
+ { "rx_length_errors" },
+ { "rx_frame_errors" },
+ { "rx_missed_errors" },
+ { "tx_carrier_errors" },
+ { "nports" },
+};
+
+static int vnet_get_sset_count(struct net_device *dev, int sset)
+{
+ struct vnet *vp = (struct vnet *)netdev_priv(dev);
+
+ switch (sset) {
+ case ETH_SS_STATS:
+ return ARRAY_SIZE(ethtool_stats_keys)
+ + (NUM_VNET_PORT_STATS * vp->nports);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static void vnet_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
+{
+ struct vnet *vp = (struct vnet *)netdev_priv(dev);
+ struct vnet_port *port;
+ char *p = (char *)buf;
+
+ switch (stringset) {
+ case ETH_SS_STATS:
+ memcpy(buf, ðtool_stats_keys, sizeof(ethtool_stats_keys));
+ p += sizeof(ethtool_stats_keys);
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(port, &vp->port_list, list) {
+ snprintf(p, ETH_GSTRING_LEN, "p%u.%s-%pM",
+ port->q_index, port->switch_port ? "s" : "q",
+ port->raddr);
+ p += ETH_GSTRING_LEN;
+ snprintf(p, ETH_GSTRING_LEN, "p%u.rx_packets",
+ port->q_index);
+ p += ETH_GSTRING_LEN;
+ snprintf(p, ETH_GSTRING_LEN, "p%u.tx_packets",
+ port->q_index);
+ p += ETH_GSTRING_LEN;
+ snprintf(p, ETH_GSTRING_LEN, "p%u.rx_bytes",
+ port->q_index);
+ p += ETH_GSTRING_LEN;
+ snprintf(p, ETH_GSTRING_LEN, "p%u.tx_bytes",
+ port->q_index);
+ p += ETH_GSTRING_LEN;
+ snprintf(p, ETH_GSTRING_LEN, "p%u.event_up",
+ port->q_index);
+ p += ETH_GSTRING_LEN;
+ snprintf(p, ETH_GSTRING_LEN, "p%u.event_reset",
+ port->q_index);
+ p += ETH_GSTRING_LEN;
+ }
+ rcu_read_unlock();
+ break;
+ default:
+ WARN_ON(1);
+ break;
+ }
+}
+
+static void vnet_get_ethtool_stats(struct net_device *dev,
+ struct ethtool_stats *estats, u64 *data)
+{
+ struct vnet *vp = (struct vnet *)netdev_priv(dev);
+ struct vnet_port *port;
+ int i = 0;
+
+ data[i++] = dev->stats.rx_packets;
+ data[i++] = dev->stats.tx_packets;
+ data[i++] = dev->stats.rx_bytes;
+ data[i++] = dev->stats.tx_bytes;
+ data[i++] = dev->stats.rx_errors;
+ data[i++] = dev->stats.tx_errors;
+ data[i++] = dev->stats.rx_dropped;
+ data[i++] = dev->stats.tx_dropped;
+ data[i++] = dev->stats.multicast;
+ data[i++] = dev->stats.rx_length_errors;
+ data[i++] = dev->stats.rx_frame_errors;
+ data[i++] = dev->stats.rx_missed_errors;
+ data[i++] = dev->stats.tx_carrier_errors;
+ data[i++] = vp->nports;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(port, &vp->port_list, list) {
+ data[i++] = port->q_index;
+ data[i++] = port->stats.rx_packets;
+ data[i++] = port->stats.tx_packets;
+ data[i++] = port->stats.rx_bytes;
+ data[i++] = port->stats.tx_bytes;
+ data[i++] = port->stats.event_up;
+ data[i++] = port->stats.event_reset;
+ }
+ rcu_read_unlock();
+}
+
+static const struct ethtool_ops vnet_ethtool_ops = {
+ .get_drvinfo = vnet_get_drvinfo,
+ .get_msglevel = vnet_get_msglevel,
+ .set_msglevel = vnet_set_msglevel,
+ .get_link = ethtool_op_get_link,
+ .get_sset_count = vnet_get_sset_count,
+ .get_strings = vnet_get_strings,
+ .get_ethtool_stats = vnet_get_ethtool_stats,
+};
+
+static LIST_HEAD(vnet_list);
+static DEFINE_MUTEX(vnet_list_mutex);
+
+static struct vnet_port *__tx_port_find(struct vnet *vp, struct sk_buff *skb)
+{
+ unsigned int hash = vnet_hashfn(skb->data);
+ struct hlist_head *hp = &vp->port_hash[hash];
+ struct vnet_port *port;
+
+ hlist_for_each_entry_rcu(port, hp, hash) {
+ if (!sunvnet_port_is_up_common(port))
+ continue;
+ if (ether_addr_equal(port->raddr, skb->data))
+ return port;
+ }
+ list_for_each_entry_rcu(port, &vp->port_list, list) {
+ if (!port->switch_port)
+ continue;
+ if (!sunvnet_port_is_up_common(port))
+ continue;
+ return port;
+ }
+ return NULL;
+}
+
+/* func arg to vnet_start_xmit_common() to get the proper tx port */
+static struct vnet_port *vnet_tx_port_find(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct vnet *vp = netdev_priv(dev);
+
+ return __tx_port_find(vp, skb);
+}
+
+static u16 vnet_select_queue(struct net_device *dev, struct sk_buff *skb,
+ struct net_device *sb_dev,
+ select_queue_fallback_t fallback)
+{
+ struct vnet *vp = netdev_priv(dev);
+ struct vnet_port *port = __tx_port_find(vp, skb);
+
+ if (!port)
+ return 0;
+
+ return port->q_index;
+}
+
+/* Wrappers to common functions */
+static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ return sunvnet_start_xmit_common(skb, dev, vnet_tx_port_find);
+}
+
+static void vnet_set_rx_mode(struct net_device *dev)
+{
+ struct vnet *vp = netdev_priv(dev);
+
+ return sunvnet_set_rx_mode_common(dev, vp);
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void vnet_poll_controller(struct net_device *dev)
+{
+ struct vnet *vp = netdev_priv(dev);
+
+ return sunvnet_poll_controller_common(dev, vp);
+}
+#endif
+
+static const struct net_device_ops vnet_ops = {
+ .ndo_open = sunvnet_open_common,
+ .ndo_stop = sunvnet_close_common,
+ .ndo_set_rx_mode = vnet_set_rx_mode,
+ .ndo_set_mac_address = sunvnet_set_mac_addr_common,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_tx_timeout = sunvnet_tx_timeout_common,
+ .ndo_start_xmit = vnet_start_xmit,
+ .ndo_select_queue = vnet_select_queue,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = vnet_poll_controller,
+#endif
+};
+
+static struct vnet *vnet_new(const u64 *local_mac,
+ struct vio_dev *vdev)
+{
+ struct net_device *dev;
+ struct vnet *vp;
+ int err, i;
+
+ dev = alloc_etherdev_mqs(sizeof(*vp), VNET_MAX_TXQS, 1);
+ if (!dev)
+ return ERR_PTR(-ENOMEM);
+ dev->needed_headroom = VNET_PACKET_SKIP + 8;
+ dev->needed_tailroom = 8;
+
+ for (i = 0; i < ETH_ALEN; i++)
+ dev->dev_addr[i] = (*local_mac >> (5 - i) * 8) & 0xff;
+
+ vp = netdev_priv(dev);
+
+ spin_lock_init(&vp->lock);
+ vp->dev = dev;
+
+ INIT_LIST_HEAD(&vp->port_list);
+ for (i = 0; i < VNET_PORT_HASH_SIZE; i++)
+ INIT_HLIST_HEAD(&vp->port_hash[i]);
+ INIT_LIST_HEAD(&vp->list);
+ vp->local_mac = *local_mac;
+
+ dev->netdev_ops = &vnet_ops;
+ dev->ethtool_ops = &vnet_ethtool_ops;
+ dev->watchdog_timeo = VNET_TX_TIMEOUT;
+
+ dev->hw_features = NETIF_F_TSO | NETIF_F_GSO | NETIF_F_ALL_TSO |
+ NETIF_F_HW_CSUM | NETIF_F_SG;
+ dev->features = dev->hw_features;
+
+ /* MTU range: 68 - 65535 */
+ dev->min_mtu = ETH_MIN_MTU;
+ dev->max_mtu = VNET_MAX_MTU;
+
+ SET_NETDEV_DEV(dev, &vdev->dev);
+
+ err = register_netdev(dev);
+ if (err) {
+ pr_err("Cannot register net device, aborting\n");
+ goto err_out_free_dev;
+ }
+
+ netdev_info(dev, "Sun LDOM vnet %pM\n", dev->dev_addr);
+
+ list_add(&vp->list, &vnet_list);
+
+ return vp;
+
+err_out_free_dev:
+ free_netdev(dev);
+
+ return ERR_PTR(err);
+}
+
+static struct vnet *vnet_find_or_create(const u64 *local_mac,
+ struct vio_dev *vdev)
+{
+ struct vnet *iter, *vp;
+
+ mutex_lock(&vnet_list_mutex);
+ vp = NULL;
+ list_for_each_entry(iter, &vnet_list, list) {
+ if (iter->local_mac == *local_mac) {
+ vp = iter;
+ break;
+ }
+ }
+ if (!vp)
+ vp = vnet_new(local_mac, vdev);
+ mutex_unlock(&vnet_list_mutex);
+
+ return vp;
+}
+
+static void vnet_cleanup(void)
+{
+ struct vnet *vp;
+ struct net_device *dev;
+
+ mutex_lock(&vnet_list_mutex);
+ while (!list_empty(&vnet_list)) {
+ vp = list_first_entry(&vnet_list, struct vnet, list);
+ list_del(&vp->list);
+ dev = vp->dev;
+ /* vio_unregister_driver() should have cleaned up port_list */
+ BUG_ON(!list_empty(&vp->port_list));
+ unregister_netdev(dev);
+ free_netdev(dev);
+ }
+ mutex_unlock(&vnet_list_mutex);
+}
+
+static const char *local_mac_prop = "local-mac-address";
+
+static struct vnet *vnet_find_parent(struct mdesc_handle *hp,
+ u64 port_node,
+ struct vio_dev *vdev)
+{
+ const u64 *local_mac = NULL;
+ u64 a;
+
+ mdesc_for_each_arc(a, hp, port_node, MDESC_ARC_TYPE_BACK) {
+ u64 target = mdesc_arc_target(hp, a);
+ const char *name;
+
+ name = mdesc_get_property(hp, target, "name", NULL);
+ if (!name || strcmp(name, "network"))
+ continue;
+
+ local_mac = mdesc_get_property(hp, target,
+ local_mac_prop, NULL);
+ if (local_mac)
+ break;
+ }
+ if (!local_mac)
+ return ERR_PTR(-ENODEV);
+
+ return vnet_find_or_create(local_mac, vdev);
+}
+
+static struct ldc_channel_config vnet_ldc_cfg = {
+ .event = sunvnet_event_common,
+ .mtu = 64,
+ .mode = LDC_MODE_UNRELIABLE,
+};
+
+static struct vio_driver_ops vnet_vio_ops = {
+ .send_attr = sunvnet_send_attr_common,
+ .handle_attr = sunvnet_handle_attr_common,
+ .handshake_complete = sunvnet_handshake_complete_common,
+};
+
+const char *remote_macaddr_prop = "remote-mac-address";
+
+static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
+{
+ struct mdesc_handle *hp;
+ struct vnet_port *port;
+ unsigned long flags;
+ struct vnet *vp;
+ const u64 *rmac;
+ int len, i, err, switch_port;
+
+ hp = mdesc_grab();
+
+ vp = vnet_find_parent(hp, vdev->mp, vdev);
+ if (IS_ERR(vp)) {
+ pr_err("Cannot find port parent vnet\n");
+ err = PTR_ERR(vp);
+ goto err_out_put_mdesc;
+ }
+
+ rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len);
+ err = -ENODEV;
+ if (!rmac) {
+ pr_err("Port lacks %s property\n", remote_macaddr_prop);
+ goto err_out_put_mdesc;
+ }
+
+ port = kzalloc(sizeof(*port), GFP_KERNEL);
+ err = -ENOMEM;
+ if (!port)
+ goto err_out_put_mdesc;
+
+ for (i = 0; i < ETH_ALEN; i++)
+ port->raddr[i] = (*rmac >> (5 - i) * 8) & 0xff;
+
+ port->vp = vp;
+
+ err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK,
+ vnet_versions, ARRAY_SIZE(vnet_versions),
+ &vnet_vio_ops, vp->dev->name);
+ if (err)
+ goto err_out_free_port;
+
+ err = vio_ldc_alloc(&port->vio, &vnet_ldc_cfg, port);
+ if (err)
+ goto err_out_free_port;
+
+ netif_napi_add(port->vp->dev, &port->napi, sunvnet_poll_common,
+ NAPI_POLL_WEIGHT);
+
+ INIT_HLIST_NODE(&port->hash);
+ INIT_LIST_HEAD(&port->list);
+
+ switch_port = 0;
+ if (mdesc_get_property(hp, vdev->mp, "switch-port", NULL))
+ switch_port = 1;
+ port->switch_port = switch_port;
+ port->tso = true;
+ port->tsolen = 0;
+
+ spin_lock_irqsave(&vp->lock, flags);
+ if (switch_port)
+ list_add_rcu(&port->list, &vp->port_list);
+ else
+ list_add_tail_rcu(&port->list, &vp->port_list);
+ hlist_add_head_rcu(&port->hash,
+ &vp->port_hash[vnet_hashfn(port->raddr)]);
+ sunvnet_port_add_txq_common(port);
+ spin_unlock_irqrestore(&vp->lock, flags);
+
+ dev_set_drvdata(&vdev->dev, port);
+
+ pr_info("%s: PORT ( remote-mac %pM%s )\n",
+ vp->dev->name, port->raddr, switch_port ? " switch-port" : "");
+
+ timer_setup(&port->clean_timer, sunvnet_clean_timer_expire_common, 0);
+
+ napi_enable(&port->napi);
+ vio_port_up(&port->vio);
+
+ mdesc_release(hp);
+
+ return 0;
+
+err_out_free_port:
+ kfree(port);
+
+err_out_put_mdesc:
+ mdesc_release(hp);
+ return err;
+}
+
+static int vnet_port_remove(struct vio_dev *vdev)
+{
+ struct vnet_port *port = dev_get_drvdata(&vdev->dev);
+
+ if (port) {
+ del_timer_sync(&port->vio.timer);
+
+ napi_disable(&port->napi);
+
+ list_del_rcu(&port->list);
+ hlist_del_rcu(&port->hash);
+
+ synchronize_rcu();
+ del_timer_sync(&port->clean_timer);
+ sunvnet_port_rm_txq_common(port);
+ netif_napi_del(&port->napi);
+ sunvnet_port_free_tx_bufs_common(port);
+ vio_ldc_free(&port->vio);
+
+ dev_set_drvdata(&vdev->dev, NULL);
+
+ kfree(port);
+ }
+ return 0;
+}
+
+static const struct vio_device_id vnet_port_match[] = {
+ {
+ .type = "vnet-port",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(vio, vnet_port_match);
+
+static struct vio_driver vnet_port_driver = {
+ .id_table = vnet_port_match,
+ .probe = vnet_port_probe,
+ .remove = vnet_port_remove,
+ .name = "vnet_port",
+};
+
+static int __init vnet_init(void)
+{
+ pr_info("%s\n", version);
+ return vio_register_driver(&vnet_port_driver);
+}
+
+static void __exit vnet_exit(void)
+{
+ vio_unregister_driver(&vnet_port_driver);
+ vnet_cleanup();
+}
+
+module_init(vnet_init);
+module_exit(vnet_exit);