1c861ef83SShannon Nelson // SPDX-License-Identifier: GPL-2.0
2e689cf4aSJeff Kirsher /* sunvnet.c: Sun LDOM Virtual Network Driver.
3e689cf4aSJeff Kirsher *
4e689cf4aSJeff Kirsher * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
50f512c84SShannon Nelson * Copyright (C) 2016-2017 Oracle. All rights reserved.
6e689cf4aSJeff Kirsher */
7e689cf4aSJeff Kirsher
8e689cf4aSJeff Kirsher #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9e689cf4aSJeff Kirsher
10e689cf4aSJeff Kirsher #include <linux/module.h>
11e689cf4aSJeff Kirsher #include <linux/kernel.h>
12e689cf4aSJeff Kirsher #include <linux/types.h>
13e689cf4aSJeff Kirsher #include <linux/slab.h>
14e689cf4aSJeff Kirsher #include <linux/delay.h>
15e689cf4aSJeff Kirsher #include <linux/init.h>
16e689cf4aSJeff Kirsher #include <linux/netdevice.h>
17e689cf4aSJeff Kirsher #include <linux/ethtool.h>
18e689cf4aSJeff Kirsher #include <linux/etherdevice.h>
19e689cf4aSJeff Kirsher #include <linux/mutex.h>
20da38c564SDavid L Stevens #include <linux/highmem.h>
21e4defc77SDavid L Stevens #include <linux/if_vlan.h>
22e689cf4aSJeff Kirsher
23a2b78e9bSDavid L Stevens #if IS_ENABLED(CONFIG_IPV6)
24a2b78e9bSDavid L Stevens #include <linux/icmpv6.h>
25a2b78e9bSDavid L Stevens #endif
26a2b78e9bSDavid L Stevens
276d0ba919SDavid L Stevens #include <net/ip.h>
28a2b78e9bSDavid L Stevens #include <net/icmp.h>
29a2b78e9bSDavid L Stevens #include <net/route.h>
30a2b78e9bSDavid L Stevens
31e689cf4aSJeff Kirsher #include <asm/vio.h>
32e689cf4aSJeff Kirsher #include <asm/ldc.h>
33e689cf4aSJeff Kirsher
3431762eaaSAaron Young #include "sunvnet_common.h"
3531762eaaSAaron Young
3631762eaaSAaron Young /* length of time before we decide the hardware is borked,
3731762eaaSAaron Young * and dev->tx_timeout() should be called to fix the problem
3831762eaaSAaron Young */
3931762eaaSAaron Young #define VNET_TX_TIMEOUT (5 * HZ)
40e689cf4aSJeff Kirsher
41e689cf4aSJeff Kirsher #define DRV_MODULE_NAME "sunvnet"
42f2f3e210SShannon Nelson #define DRV_MODULE_VERSION "2.0"
43f2f3e210SShannon Nelson #define DRV_MODULE_RELDATE "February 3, 2017"
44e689cf4aSJeff Kirsher
45f73d12bdSBill Pemberton static char version[] =
46f2f3e210SShannon Nelson DRV_MODULE_NAME " " DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")";
47e689cf4aSJeff Kirsher MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
48e689cf4aSJeff Kirsher MODULE_DESCRIPTION("Sun LDOM virtual network driver");
49e689cf4aSJeff Kirsher MODULE_LICENSE("GPL");
50e689cf4aSJeff Kirsher MODULE_VERSION(DRV_MODULE_VERSION);
51e689cf4aSJeff Kirsher
52e689cf4aSJeff Kirsher /* Ordered from largest major to lowest */
53e689cf4aSJeff Kirsher static struct vio_version vnet_versions[] = {
546d0ba919SDavid L Stevens { .major = 1, .minor = 8 },
556d0ba919SDavid L Stevens { .major = 1, .minor = 7 },
56e4defc77SDavid L Stevens { .major = 1, .minor = 6 },
57e689cf4aSJeff Kirsher { .major = 1, .minor = 0 },
58e689cf4aSJeff Kirsher };
59e689cf4aSJeff Kirsher
vnet_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * info)60e689cf4aSJeff Kirsher static void vnet_get_drvinfo(struct net_device *dev,
61e689cf4aSJeff Kirsher struct ethtool_drvinfo *info)
62e689cf4aSJeff Kirsher {
63f029c781SWolfram Sang strscpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
64f029c781SWolfram Sang strscpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
65e689cf4aSJeff Kirsher }
66e689cf4aSJeff Kirsher
vnet_get_msglevel(struct net_device * dev)67e689cf4aSJeff Kirsher static u32 vnet_get_msglevel(struct net_device *dev)
68e689cf4aSJeff Kirsher {
69e689cf4aSJeff Kirsher struct vnet *vp = netdev_priv(dev);
70dc153f85SAaron Young
71e689cf4aSJeff Kirsher return vp->msg_enable;
72e689cf4aSJeff Kirsher }
73e689cf4aSJeff Kirsher
vnet_set_msglevel(struct net_device * dev,u32 value)74e689cf4aSJeff Kirsher static void vnet_set_msglevel(struct net_device *dev, u32 value)
75e689cf4aSJeff Kirsher {
76e689cf4aSJeff Kirsher struct vnet *vp = netdev_priv(dev);
77dc153f85SAaron Young
78e689cf4aSJeff Kirsher vp->msg_enable = value;
79e689cf4aSJeff Kirsher }
80e689cf4aSJeff Kirsher
810f512c84SShannon Nelson static const struct {
820f512c84SShannon Nelson const char string[ETH_GSTRING_LEN];
830f512c84SShannon Nelson } ethtool_stats_keys[] = {
840f512c84SShannon Nelson { "rx_packets" },
850f512c84SShannon Nelson { "tx_packets" },
860f512c84SShannon Nelson { "rx_bytes" },
870f512c84SShannon Nelson { "tx_bytes" },
880f512c84SShannon Nelson { "rx_errors" },
890f512c84SShannon Nelson { "tx_errors" },
900f512c84SShannon Nelson { "rx_dropped" },
910f512c84SShannon Nelson { "tx_dropped" },
920f512c84SShannon Nelson { "multicast" },
930f512c84SShannon Nelson { "rx_length_errors" },
940f512c84SShannon Nelson { "rx_frame_errors" },
950f512c84SShannon Nelson { "rx_missed_errors" },
960f512c84SShannon Nelson { "tx_carrier_errors" },
970f512c84SShannon Nelson { "nports" },
980f512c84SShannon Nelson };
990f512c84SShannon Nelson
vnet_get_sset_count(struct net_device * dev,int sset)1000f512c84SShannon Nelson static int vnet_get_sset_count(struct net_device *dev, int sset)
1010f512c84SShannon Nelson {
1020f512c84SShannon Nelson struct vnet *vp = (struct vnet *)netdev_priv(dev);
1030f512c84SShannon Nelson
1040f512c84SShannon Nelson switch (sset) {
1050f512c84SShannon Nelson case ETH_SS_STATS:
1060f512c84SShannon Nelson return ARRAY_SIZE(ethtool_stats_keys)
1070f512c84SShannon Nelson + (NUM_VNET_PORT_STATS * vp->nports);
1080f512c84SShannon Nelson default:
1090f512c84SShannon Nelson return -EOPNOTSUPP;
1100f512c84SShannon Nelson }
1110f512c84SShannon Nelson }
1120f512c84SShannon Nelson
vnet_get_strings(struct net_device * dev,u32 stringset,u8 * buf)1130f512c84SShannon Nelson static void vnet_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
1140f512c84SShannon Nelson {
1150f512c84SShannon Nelson struct vnet *vp = (struct vnet *)netdev_priv(dev);
1160f512c84SShannon Nelson struct vnet_port *port;
1170f512c84SShannon Nelson char *p = (char *)buf;
1180f512c84SShannon Nelson
1190f512c84SShannon Nelson switch (stringset) {
1200f512c84SShannon Nelson case ETH_SS_STATS:
1210f512c84SShannon Nelson memcpy(buf, ðtool_stats_keys, sizeof(ethtool_stats_keys));
1220f512c84SShannon Nelson p += sizeof(ethtool_stats_keys);
1230f512c84SShannon Nelson
1240f512c84SShannon Nelson rcu_read_lock();
1250f512c84SShannon Nelson list_for_each_entry_rcu(port, &vp->port_list, list) {
1260f512c84SShannon Nelson snprintf(p, ETH_GSTRING_LEN, "p%u.%s-%pM",
1270f512c84SShannon Nelson port->q_index, port->switch_port ? "s" : "q",
1280f512c84SShannon Nelson port->raddr);
1290f512c84SShannon Nelson p += ETH_GSTRING_LEN;
1300f512c84SShannon Nelson snprintf(p, ETH_GSTRING_LEN, "p%u.rx_packets",
1310f512c84SShannon Nelson port->q_index);
1320f512c84SShannon Nelson p += ETH_GSTRING_LEN;
1330f512c84SShannon Nelson snprintf(p, ETH_GSTRING_LEN, "p%u.tx_packets",
1340f512c84SShannon Nelson port->q_index);
1350f512c84SShannon Nelson p += ETH_GSTRING_LEN;
1360f512c84SShannon Nelson snprintf(p, ETH_GSTRING_LEN, "p%u.rx_bytes",
1370f512c84SShannon Nelson port->q_index);
1380f512c84SShannon Nelson p += ETH_GSTRING_LEN;
1390f512c84SShannon Nelson snprintf(p, ETH_GSTRING_LEN, "p%u.tx_bytes",
1400f512c84SShannon Nelson port->q_index);
1410f512c84SShannon Nelson p += ETH_GSTRING_LEN;
1420f512c84SShannon Nelson snprintf(p, ETH_GSTRING_LEN, "p%u.event_up",
1430f512c84SShannon Nelson port->q_index);
1440f512c84SShannon Nelson p += ETH_GSTRING_LEN;
1450f512c84SShannon Nelson snprintf(p, ETH_GSTRING_LEN, "p%u.event_reset",
1460f512c84SShannon Nelson port->q_index);
1470f512c84SShannon Nelson p += ETH_GSTRING_LEN;
1480f512c84SShannon Nelson }
1490f512c84SShannon Nelson rcu_read_unlock();
1500f512c84SShannon Nelson break;
1510f512c84SShannon Nelson default:
1520f512c84SShannon Nelson WARN_ON(1);
1530f512c84SShannon Nelson break;
1540f512c84SShannon Nelson }
1550f512c84SShannon Nelson }
1560f512c84SShannon Nelson
vnet_get_ethtool_stats(struct net_device * dev,struct ethtool_stats * estats,u64 * data)1570f512c84SShannon Nelson static void vnet_get_ethtool_stats(struct net_device *dev,
1580f512c84SShannon Nelson struct ethtool_stats *estats, u64 *data)
1590f512c84SShannon Nelson {
1600f512c84SShannon Nelson struct vnet *vp = (struct vnet *)netdev_priv(dev);
1610f512c84SShannon Nelson struct vnet_port *port;
1620f512c84SShannon Nelson int i = 0;
1630f512c84SShannon Nelson
1640f512c84SShannon Nelson data[i++] = dev->stats.rx_packets;
1650f512c84SShannon Nelson data[i++] = dev->stats.tx_packets;
1660f512c84SShannon Nelson data[i++] = dev->stats.rx_bytes;
1670f512c84SShannon Nelson data[i++] = dev->stats.tx_bytes;
1680f512c84SShannon Nelson data[i++] = dev->stats.rx_errors;
1690f512c84SShannon Nelson data[i++] = dev->stats.tx_errors;
1700f512c84SShannon Nelson data[i++] = dev->stats.rx_dropped;
1710f512c84SShannon Nelson data[i++] = dev->stats.tx_dropped;
1720f512c84SShannon Nelson data[i++] = dev->stats.multicast;
1730f512c84SShannon Nelson data[i++] = dev->stats.rx_length_errors;
1740f512c84SShannon Nelson data[i++] = dev->stats.rx_frame_errors;
1750f512c84SShannon Nelson data[i++] = dev->stats.rx_missed_errors;
1760f512c84SShannon Nelson data[i++] = dev->stats.tx_carrier_errors;
1770f512c84SShannon Nelson data[i++] = vp->nports;
1780f512c84SShannon Nelson
1790f512c84SShannon Nelson rcu_read_lock();
1800f512c84SShannon Nelson list_for_each_entry_rcu(port, &vp->port_list, list) {
1810f512c84SShannon Nelson data[i++] = port->q_index;
1820f512c84SShannon Nelson data[i++] = port->stats.rx_packets;
1830f512c84SShannon Nelson data[i++] = port->stats.tx_packets;
1840f512c84SShannon Nelson data[i++] = port->stats.rx_bytes;
1850f512c84SShannon Nelson data[i++] = port->stats.tx_bytes;
1860f512c84SShannon Nelson data[i++] = port->stats.event_up;
1870f512c84SShannon Nelson data[i++] = port->stats.event_reset;
1880f512c84SShannon Nelson }
1890f512c84SShannon Nelson rcu_read_unlock();
1900f512c84SShannon Nelson }
1910f512c84SShannon Nelson
192e689cf4aSJeff Kirsher static const struct ethtool_ops vnet_ethtool_ops = {
193e689cf4aSJeff Kirsher .get_drvinfo = vnet_get_drvinfo,
194e689cf4aSJeff Kirsher .get_msglevel = vnet_get_msglevel,
195e689cf4aSJeff Kirsher .set_msglevel = vnet_set_msglevel,
196e689cf4aSJeff Kirsher .get_link = ethtool_op_get_link,
1970f512c84SShannon Nelson .get_sset_count = vnet_get_sset_count,
1980f512c84SShannon Nelson .get_strings = vnet_get_strings,
1990f512c84SShannon Nelson .get_ethtool_stats = vnet_get_ethtool_stats,
200e689cf4aSJeff Kirsher };
201e689cf4aSJeff Kirsher
202e689cf4aSJeff Kirsher static LIST_HEAD(vnet_list);
203e689cf4aSJeff Kirsher static DEFINE_MUTEX(vnet_list_mutex);
204e689cf4aSJeff Kirsher
__tx_port_find(struct vnet * vp,struct sk_buff * skb)20567d0719fSAaron Young static struct vnet_port *__tx_port_find(struct vnet *vp, struct sk_buff *skb)
20667d0719fSAaron Young {
20767d0719fSAaron Young unsigned int hash = vnet_hashfn(skb->data);
20867d0719fSAaron Young struct hlist_head *hp = &vp->port_hash[hash];
20967d0719fSAaron Young struct vnet_port *port;
21067d0719fSAaron Young
21167d0719fSAaron Young hlist_for_each_entry_rcu(port, hp, hash) {
21267d0719fSAaron Young if (!sunvnet_port_is_up_common(port))
21367d0719fSAaron Young continue;
21467d0719fSAaron Young if (ether_addr_equal(port->raddr, skb->data))
21567d0719fSAaron Young return port;
21667d0719fSAaron Young }
21767d0719fSAaron Young list_for_each_entry_rcu(port, &vp->port_list, list) {
21867d0719fSAaron Young if (!port->switch_port)
21967d0719fSAaron Young continue;
22067d0719fSAaron Young if (!sunvnet_port_is_up_common(port))
22167d0719fSAaron Young continue;
22267d0719fSAaron Young return port;
22367d0719fSAaron Young }
22467d0719fSAaron Young return NULL;
22567d0719fSAaron Young }
22667d0719fSAaron Young
22767d0719fSAaron Young /* func arg to vnet_start_xmit_common() to get the proper tx port */
vnet_tx_port_find(struct sk_buff * skb,struct net_device * dev)22867d0719fSAaron Young static struct vnet_port *vnet_tx_port_find(struct sk_buff *skb,
22967d0719fSAaron Young struct net_device *dev)
23067d0719fSAaron Young {
23167d0719fSAaron Young struct vnet *vp = netdev_priv(dev);
23267d0719fSAaron Young
23367d0719fSAaron Young return __tx_port_find(vp, skb);
23467d0719fSAaron Young }
23567d0719fSAaron Young
vnet_select_queue(struct net_device * dev,struct sk_buff * skb,struct net_device * sb_dev)23667d0719fSAaron Young static u16 vnet_select_queue(struct net_device *dev, struct sk_buff *skb,
237a350ecceSPaolo Abeni struct net_device *sb_dev)
23867d0719fSAaron Young {
23967d0719fSAaron Young struct vnet *vp = netdev_priv(dev);
24067d0719fSAaron Young struct vnet_port *port = __tx_port_find(vp, skb);
24167d0719fSAaron Young
24267d0719fSAaron Young if (!port)
24367d0719fSAaron Young return 0;
24467d0719fSAaron Young
24567d0719fSAaron Young return port->q_index;
24667d0719fSAaron Young }
24767d0719fSAaron Young
24867d0719fSAaron Young /* Wrappers to common functions */
vnet_start_xmit(struct sk_buff * skb,struct net_device * dev)2490e0cc31fSYueHaibing static netdev_tx_t vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
25067d0719fSAaron Young {
25167d0719fSAaron Young return sunvnet_start_xmit_common(skb, dev, vnet_tx_port_find);
25267d0719fSAaron Young }
25367d0719fSAaron Young
vnet_set_rx_mode(struct net_device * dev)25467d0719fSAaron Young static void vnet_set_rx_mode(struct net_device *dev)
25567d0719fSAaron Young {
25667d0719fSAaron Young struct vnet *vp = netdev_priv(dev);
25767d0719fSAaron Young
25867d0719fSAaron Young return sunvnet_set_rx_mode_common(dev, vp);
25967d0719fSAaron Young }
26067d0719fSAaron Young
26167d0719fSAaron Young #ifdef CONFIG_NET_POLL_CONTROLLER
vnet_poll_controller(struct net_device * dev)26267d0719fSAaron Young static void vnet_poll_controller(struct net_device *dev)
26367d0719fSAaron Young {
26467d0719fSAaron Young struct vnet *vp = netdev_priv(dev);
26567d0719fSAaron Young
26667d0719fSAaron Young return sunvnet_poll_controller_common(dev, vp);
26767d0719fSAaron Young }
26867d0719fSAaron Young #endif
26967d0719fSAaron Young
270e689cf4aSJeff Kirsher static const struct net_device_ops vnet_ops = {
27131762eaaSAaron Young .ndo_open = sunvnet_open_common,
27231762eaaSAaron Young .ndo_stop = sunvnet_close_common,
27367d0719fSAaron Young .ndo_set_rx_mode = vnet_set_rx_mode,
27431762eaaSAaron Young .ndo_set_mac_address = sunvnet_set_mac_addr_common,
275e689cf4aSJeff Kirsher .ndo_validate_addr = eth_validate_addr,
27631762eaaSAaron Young .ndo_tx_timeout = sunvnet_tx_timeout_common,
27767d0719fSAaron Young .ndo_start_xmit = vnet_start_xmit,
27867d0719fSAaron Young .ndo_select_queue = vnet_select_queue,
27969088822SSowmini Varadhan #ifdef CONFIG_NET_POLL_CONTROLLER
28067d0719fSAaron Young .ndo_poll_controller = vnet_poll_controller,
28169088822SSowmini Varadhan #endif
282e689cf4aSJeff Kirsher };
283e689cf4aSJeff Kirsher
vnet_new(const u64 * local_mac,struct vio_dev * vdev)2844c5d283aSSowmini Varadhan static struct vnet *vnet_new(const u64 *local_mac,
2854c5d283aSSowmini Varadhan struct vio_dev *vdev)
286e689cf4aSJeff Kirsher {
287e689cf4aSJeff Kirsher struct net_device *dev;
2884abd7cffSJakub Kicinski u8 addr[ETH_ALEN];
289e689cf4aSJeff Kirsher struct vnet *vp;
290e689cf4aSJeff Kirsher int err, i;
291e689cf4aSJeff Kirsher
292d51bffd1SSowmini Varadhan dev = alloc_etherdev_mqs(sizeof(*vp), VNET_MAX_TXQS, 1);
29341de8d4cSJoe Perches if (!dev)
294e689cf4aSJeff Kirsher return ERR_PTR(-ENOMEM);
2958e845f4cSDavid L Stevens dev->needed_headroom = VNET_PACKET_SKIP + 8;
2968e845f4cSDavid L Stevens dev->needed_tailroom = 8;
297e689cf4aSJeff Kirsher
298e689cf4aSJeff Kirsher for (i = 0; i < ETH_ALEN; i++)
2994abd7cffSJakub Kicinski addr[i] = (*local_mac >> (5 - i) * 8) & 0xff;
3004abd7cffSJakub Kicinski eth_hw_addr_set(dev, addr);
301e689cf4aSJeff Kirsher
302e689cf4aSJeff Kirsher vp = netdev_priv(dev);
303e689cf4aSJeff Kirsher
304e689cf4aSJeff Kirsher spin_lock_init(&vp->lock);
305e689cf4aSJeff Kirsher vp->dev = dev;
306e689cf4aSJeff Kirsher
307e689cf4aSJeff Kirsher INIT_LIST_HEAD(&vp->port_list);
308e689cf4aSJeff Kirsher for (i = 0; i < VNET_PORT_HASH_SIZE; i++)
309e689cf4aSJeff Kirsher INIT_HLIST_HEAD(&vp->port_hash[i]);
310e689cf4aSJeff Kirsher INIT_LIST_HEAD(&vp->list);
311e689cf4aSJeff Kirsher vp->local_mac = *local_mac;
312e689cf4aSJeff Kirsher
313e689cf4aSJeff Kirsher dev->netdev_ops = &vnet_ops;
314e689cf4aSJeff Kirsher dev->ethtool_ops = &vnet_ethtool_ops;
315e689cf4aSJeff Kirsher dev->watchdog_timeo = VNET_TX_TIMEOUT;
316e689cf4aSJeff Kirsher
317cf55612aSCathy Zhou dev->hw_features = NETIF_F_TSO | NETIF_F_GSO | NETIF_F_ALL_TSO |
31898524e04SShannon Nelson NETIF_F_HW_CSUM | NETIF_F_SG;
319da38c564SDavid L Stevens dev->features = dev->hw_features;
320da38c564SDavid L Stevens
321540bfe30SJarod Wilson /* MTU range: 68 - 65535 */
322540bfe30SJarod Wilson dev->min_mtu = ETH_MIN_MTU;
323540bfe30SJarod Wilson dev->max_mtu = VNET_MAX_MTU;
324540bfe30SJarod Wilson
3254c5d283aSSowmini Varadhan SET_NETDEV_DEV(dev, &vdev->dev);
3264c5d283aSSowmini Varadhan
327e689cf4aSJeff Kirsher err = register_netdev(dev);
328e689cf4aSJeff Kirsher if (err) {
329e689cf4aSJeff Kirsher pr_err("Cannot register net device, aborting\n");
330e689cf4aSJeff Kirsher goto err_out_free_dev;
331e689cf4aSJeff Kirsher }
332e689cf4aSJeff Kirsher
333e689cf4aSJeff Kirsher netdev_info(dev, "Sun LDOM vnet %pM\n", dev->dev_addr);
334e689cf4aSJeff Kirsher
335e689cf4aSJeff Kirsher list_add(&vp->list, &vnet_list);
336e689cf4aSJeff Kirsher
337e689cf4aSJeff Kirsher return vp;
338e689cf4aSJeff Kirsher
339e689cf4aSJeff Kirsher err_out_free_dev:
340e689cf4aSJeff Kirsher free_netdev(dev);
341e689cf4aSJeff Kirsher
342e689cf4aSJeff Kirsher return ERR_PTR(err);
343e689cf4aSJeff Kirsher }
344e689cf4aSJeff Kirsher
vnet_find_or_create(const u64 * local_mac,struct vio_dev * vdev)3454c5d283aSSowmini Varadhan static struct vnet *vnet_find_or_create(const u64 *local_mac,
3464c5d283aSSowmini Varadhan struct vio_dev *vdev)
347e689cf4aSJeff Kirsher {
348e689cf4aSJeff Kirsher struct vnet *iter, *vp;
349e689cf4aSJeff Kirsher
350e689cf4aSJeff Kirsher mutex_lock(&vnet_list_mutex);
351e689cf4aSJeff Kirsher vp = NULL;
352e689cf4aSJeff Kirsher list_for_each_entry(iter, &vnet_list, list) {
353e689cf4aSJeff Kirsher if (iter->local_mac == *local_mac) {
354e689cf4aSJeff Kirsher vp = iter;
355e689cf4aSJeff Kirsher break;
356e689cf4aSJeff Kirsher }
357e689cf4aSJeff Kirsher }
358e689cf4aSJeff Kirsher if (!vp)
3594c5d283aSSowmini Varadhan vp = vnet_new(local_mac, vdev);
360e689cf4aSJeff Kirsher mutex_unlock(&vnet_list_mutex);
361e689cf4aSJeff Kirsher
362e689cf4aSJeff Kirsher return vp;
363e689cf4aSJeff Kirsher }
364e689cf4aSJeff Kirsher
vnet_cleanup(void)365a4b70a07SSowmini Varadhan static void vnet_cleanup(void)
366a4b70a07SSowmini Varadhan {
367a4b70a07SSowmini Varadhan struct vnet *vp;
368a4b70a07SSowmini Varadhan struct net_device *dev;
369a4b70a07SSowmini Varadhan
370a4b70a07SSowmini Varadhan mutex_lock(&vnet_list_mutex);
371a4b70a07SSowmini Varadhan while (!list_empty(&vnet_list)) {
372a4b70a07SSowmini Varadhan vp = list_first_entry(&vnet_list, struct vnet, list);
373a4b70a07SSowmini Varadhan list_del(&vp->list);
374a4b70a07SSowmini Varadhan dev = vp->dev;
375a4b70a07SSowmini Varadhan /* vio_unregister_driver() should have cleaned up port_list */
376a4b70a07SSowmini Varadhan BUG_ON(!list_empty(&vp->port_list));
377a4b70a07SSowmini Varadhan unregister_netdev(dev);
378a4b70a07SSowmini Varadhan free_netdev(dev);
379a4b70a07SSowmini Varadhan }
380a4b70a07SSowmini Varadhan mutex_unlock(&vnet_list_mutex);
381a4b70a07SSowmini Varadhan }
382a4b70a07SSowmini Varadhan
383e689cf4aSJeff Kirsher static const char *local_mac_prop = "local-mac-address";
384e689cf4aSJeff Kirsher
vnet_find_parent(struct mdesc_handle * hp,u64 port_node,struct vio_dev * vdev)385f73d12bdSBill Pemberton static struct vnet *vnet_find_parent(struct mdesc_handle *hp,
3864c5d283aSSowmini Varadhan u64 port_node,
3874c5d283aSSowmini Varadhan struct vio_dev *vdev)
388e689cf4aSJeff Kirsher {
389e689cf4aSJeff Kirsher const u64 *local_mac = NULL;
390e689cf4aSJeff Kirsher u64 a;
391e689cf4aSJeff Kirsher
392e689cf4aSJeff Kirsher mdesc_for_each_arc(a, hp, port_node, MDESC_ARC_TYPE_BACK) {
393e689cf4aSJeff Kirsher u64 target = mdesc_arc_target(hp, a);
394e689cf4aSJeff Kirsher const char *name;
395e689cf4aSJeff Kirsher
396e689cf4aSJeff Kirsher name = mdesc_get_property(hp, target, "name", NULL);
397e689cf4aSJeff Kirsher if (!name || strcmp(name, "network"))
398e689cf4aSJeff Kirsher continue;
399e689cf4aSJeff Kirsher
400e689cf4aSJeff Kirsher local_mac = mdesc_get_property(hp, target,
401e689cf4aSJeff Kirsher local_mac_prop, NULL);
402e689cf4aSJeff Kirsher if (local_mac)
403e689cf4aSJeff Kirsher break;
404e689cf4aSJeff Kirsher }
405e689cf4aSJeff Kirsher if (!local_mac)
406e689cf4aSJeff Kirsher return ERR_PTR(-ENODEV);
407e689cf4aSJeff Kirsher
4084c5d283aSSowmini Varadhan return vnet_find_or_create(local_mac, vdev);
409e689cf4aSJeff Kirsher }
410e689cf4aSJeff Kirsher
411e689cf4aSJeff Kirsher static struct ldc_channel_config vnet_ldc_cfg = {
41231762eaaSAaron Young .event = sunvnet_event_common,
413e689cf4aSJeff Kirsher .mtu = 64,
414e689cf4aSJeff Kirsher .mode = LDC_MODE_UNRELIABLE,
415e689cf4aSJeff Kirsher };
416e689cf4aSJeff Kirsher
417e689cf4aSJeff Kirsher static struct vio_driver_ops vnet_vio_ops = {
41831762eaaSAaron Young .send_attr = sunvnet_send_attr_common,
41931762eaaSAaron Young .handle_attr = sunvnet_handle_attr_common,
42031762eaaSAaron Young .handshake_complete = sunvnet_handshake_complete_common,
421e689cf4aSJeff Kirsher };
422e689cf4aSJeff Kirsher
423e689cf4aSJeff Kirsher const char *remote_macaddr_prop = "remote-mac-address";
424e689cf4aSJeff Kirsher
vnet_port_probe(struct vio_dev * vdev,const struct vio_device_id * id)4251dd06ae8SGreg Kroah-Hartman static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
426e689cf4aSJeff Kirsher {
427e689cf4aSJeff Kirsher struct mdesc_handle *hp;
428e689cf4aSJeff Kirsher struct vnet_port *port;
429e689cf4aSJeff Kirsher unsigned long flags;
430e689cf4aSJeff Kirsher struct vnet *vp;
431e689cf4aSJeff Kirsher const u64 *rmac;
432e689cf4aSJeff Kirsher int len, i, err, switch_port;
433e689cf4aSJeff Kirsher
434e689cf4aSJeff Kirsher hp = mdesc_grab();
435e689cf4aSJeff Kirsher
436*90de546dSLiang He if (!hp)
437*90de546dSLiang He return -ENODEV;
438*90de546dSLiang He
4394c5d283aSSowmini Varadhan vp = vnet_find_parent(hp, vdev->mp, vdev);
440e689cf4aSJeff Kirsher if (IS_ERR(vp)) {
441e689cf4aSJeff Kirsher pr_err("Cannot find port parent vnet\n");
442e689cf4aSJeff Kirsher err = PTR_ERR(vp);
443e689cf4aSJeff Kirsher goto err_out_put_mdesc;
444e689cf4aSJeff Kirsher }
445e689cf4aSJeff Kirsher
446e689cf4aSJeff Kirsher rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len);
447e689cf4aSJeff Kirsher err = -ENODEV;
448e689cf4aSJeff Kirsher if (!rmac) {
449e689cf4aSJeff Kirsher pr_err("Port lacks %s property\n", remote_macaddr_prop);
450e689cf4aSJeff Kirsher goto err_out_put_mdesc;
451e689cf4aSJeff Kirsher }
452e689cf4aSJeff Kirsher
453e689cf4aSJeff Kirsher port = kzalloc(sizeof(*port), GFP_KERNEL);
454e689cf4aSJeff Kirsher err = -ENOMEM;
455e404decbSJoe Perches if (!port)
456e689cf4aSJeff Kirsher goto err_out_put_mdesc;
457e689cf4aSJeff Kirsher
458e689cf4aSJeff Kirsher for (i = 0; i < ETH_ALEN; i++)
459e689cf4aSJeff Kirsher port->raddr[i] = (*rmac >> (5 - i) * 8) & 0xff;
460e689cf4aSJeff Kirsher
461e689cf4aSJeff Kirsher port->vp = vp;
462e689cf4aSJeff Kirsher
463e689cf4aSJeff Kirsher err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK,
464e689cf4aSJeff Kirsher vnet_versions, ARRAY_SIZE(vnet_versions),
465e689cf4aSJeff Kirsher &vnet_vio_ops, vp->dev->name);
466e689cf4aSJeff Kirsher if (err)
467e689cf4aSJeff Kirsher goto err_out_free_port;
468e689cf4aSJeff Kirsher
469e689cf4aSJeff Kirsher err = vio_ldc_alloc(&port->vio, &vnet_ldc_cfg, port);
470e689cf4aSJeff Kirsher if (err)
471e689cf4aSJeff Kirsher goto err_out_free_port;
472e689cf4aSJeff Kirsher
473b48b89f9SJakub Kicinski netif_napi_add(port->vp->dev, &port->napi, sunvnet_poll_common);
47469088822SSowmini Varadhan
475e689cf4aSJeff Kirsher INIT_HLIST_NODE(&port->hash);
476e689cf4aSJeff Kirsher INIT_LIST_HEAD(&port->list);
477e689cf4aSJeff Kirsher
478e689cf4aSJeff Kirsher switch_port = 0;
479dc153f85SAaron Young if (mdesc_get_property(hp, vdev->mp, "switch-port", NULL))
480e689cf4aSJeff Kirsher switch_port = 1;
481e689cf4aSJeff Kirsher port->switch_port = switch_port;
482368e36edSDavid L Stevens port->tso = true;
483368e36edSDavid L Stevens port->tsolen = 0;
484e689cf4aSJeff Kirsher
485e689cf4aSJeff Kirsher spin_lock_irqsave(&vp->lock, flags);
486e689cf4aSJeff Kirsher if (switch_port)
4872a968dd8SSowmini Varadhan list_add_rcu(&port->list, &vp->port_list);
488e689cf4aSJeff Kirsher else
4892a968dd8SSowmini Varadhan list_add_tail_rcu(&port->list, &vp->port_list);
4902a968dd8SSowmini Varadhan hlist_add_head_rcu(&port->hash,
4912a968dd8SSowmini Varadhan &vp->port_hash[vnet_hashfn(port->raddr)]);
49231762eaaSAaron Young sunvnet_port_add_txq_common(port);
493e689cf4aSJeff Kirsher spin_unlock_irqrestore(&vp->lock, flags);
494e689cf4aSJeff Kirsher
495e689cf4aSJeff Kirsher dev_set_drvdata(&vdev->dev, port);
496e689cf4aSJeff Kirsher
497e689cf4aSJeff Kirsher pr_info("%s: PORT ( remote-mac %pM%s )\n",
498e689cf4aSJeff Kirsher vp->dev->name, port->raddr, switch_port ? " switch-port" : "");
499e689cf4aSJeff Kirsher
5000822c5d9SKees Cook timer_setup(&port->clean_timer, sunvnet_clean_timer_expire_common, 0);
5018e845f4cSDavid L Stevens
50269088822SSowmini Varadhan napi_enable(&port->napi);
503e689cf4aSJeff Kirsher vio_port_up(&port->vio);
504e689cf4aSJeff Kirsher
505e689cf4aSJeff Kirsher mdesc_release(hp);
506e689cf4aSJeff Kirsher
507e689cf4aSJeff Kirsher return 0;
508e689cf4aSJeff Kirsher
509e689cf4aSJeff Kirsher err_out_free_port:
510e689cf4aSJeff Kirsher kfree(port);
511e689cf4aSJeff Kirsher
512e689cf4aSJeff Kirsher err_out_put_mdesc:
513e689cf4aSJeff Kirsher mdesc_release(hp);
514e689cf4aSJeff Kirsher return err;
515e689cf4aSJeff Kirsher }
516e689cf4aSJeff Kirsher
vnet_port_remove(struct vio_dev * vdev)5171553573cSUwe Kleine-König static void vnet_port_remove(struct vio_dev *vdev)
518e689cf4aSJeff Kirsher {
519e689cf4aSJeff Kirsher struct vnet_port *port = dev_get_drvdata(&vdev->dev);
520e689cf4aSJeff Kirsher
521e689cf4aSJeff Kirsher if (port) {
522e689cf4aSJeff Kirsher del_timer_sync(&port->vio.timer);
523e689cf4aSJeff Kirsher
52469088822SSowmini Varadhan napi_disable(&port->napi);
525e689cf4aSJeff Kirsher
5262a968dd8SSowmini Varadhan list_del_rcu(&port->list);
5272a968dd8SSowmini Varadhan hlist_del_rcu(&port->hash);
5282a968dd8SSowmini Varadhan
5292a968dd8SSowmini Varadhan synchronize_rcu();
530292a089dSSteven Rostedt (Google) timer_shutdown_sync(&port->clean_timer);
53131762eaaSAaron Young sunvnet_port_rm_txq_common(port);
53269088822SSowmini Varadhan netif_napi_del(&port->napi);
53331762eaaSAaron Young sunvnet_port_free_tx_bufs_common(port);
534e689cf4aSJeff Kirsher vio_ldc_free(&port->vio);
535e689cf4aSJeff Kirsher
536e689cf4aSJeff Kirsher dev_set_drvdata(&vdev->dev, NULL);
537e689cf4aSJeff Kirsher
538e689cf4aSJeff Kirsher kfree(port);
539e689cf4aSJeff Kirsher }
540e689cf4aSJeff Kirsher }
541e689cf4aSJeff Kirsher
542e689cf4aSJeff Kirsher static const struct vio_device_id vnet_port_match[] = {
543e689cf4aSJeff Kirsher {
544e689cf4aSJeff Kirsher .type = "vnet-port",
545e689cf4aSJeff Kirsher },
546e689cf4aSJeff Kirsher {},
547e689cf4aSJeff Kirsher };
548e689cf4aSJeff Kirsher MODULE_DEVICE_TABLE(vio, vnet_port_match);
549e689cf4aSJeff Kirsher
550e689cf4aSJeff Kirsher static struct vio_driver vnet_port_driver = {
551e689cf4aSJeff Kirsher .id_table = vnet_port_match,
552e689cf4aSJeff Kirsher .probe = vnet_port_probe,
553e689cf4aSJeff Kirsher .remove = vnet_port_remove,
554e689cf4aSJeff Kirsher .name = "vnet_port",
555e689cf4aSJeff Kirsher };
556e689cf4aSJeff Kirsher
vnet_init(void)557e689cf4aSJeff Kirsher static int __init vnet_init(void)
558e689cf4aSJeff Kirsher {
559f2f3e210SShannon Nelson pr_info("%s\n", version);
560e689cf4aSJeff Kirsher return vio_register_driver(&vnet_port_driver);
561e689cf4aSJeff Kirsher }
562e689cf4aSJeff Kirsher
vnet_exit(void)563e689cf4aSJeff Kirsher static void __exit vnet_exit(void)
564e689cf4aSJeff Kirsher {
565e689cf4aSJeff Kirsher vio_unregister_driver(&vnet_port_driver);
566a4b70a07SSowmini Varadhan vnet_cleanup();
567e689cf4aSJeff Kirsher }
568e689cf4aSJeff Kirsher
569e689cf4aSJeff Kirsher module_init(vnet_init);
570e689cf4aSJeff Kirsher module_exit(vnet_exit);
571