1 /* sunvnet.c: Sun LDOM Virtual Network Driver.
3 * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
4 * Copyright (C) 2016-2017 Oracle. All rights reserved.
7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9 #include <linux/module.h>
10 #include <linux/kernel.h>
11 #include <linux/types.h>
12 #include <linux/slab.h>
13 #include <linux/delay.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/ethtool.h>
17 #include <linux/etherdevice.h>
18 #include <linux/mutex.h>
19 #include <linux/highmem.h>
20 #include <linux/if_vlan.h>
22 #if IS_ENABLED(CONFIG_IPV6)
23 #include <linux/icmpv6.h>
28 #include <net/route.h>
33 #include "sunvnet_common.h"
35 /* length of time before we decide the hardware is borked,
36 * and dev->tx_timeout() should be called to fix the problem
38 #define VNET_TX_TIMEOUT (5 * HZ)
40 #define DRV_MODULE_NAME "sunvnet"
41 #define DRV_MODULE_VERSION "2.0"
42 #define DRV_MODULE_RELDATE "February 3, 2017"
44 static char version[] =
45 DRV_MODULE_NAME " " DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")";
46 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
47 MODULE_DESCRIPTION("Sun LDOM virtual network driver");
48 MODULE_LICENSE("GPL");
49 MODULE_VERSION(DRV_MODULE_VERSION);
51 /* Ordered from largest major to lowest */
52 static struct vio_version vnet_versions[] = {
53 { .major = 1, .minor = 8 },
54 { .major = 1, .minor = 7 },
55 { .major = 1, .minor = 6 },
56 { .major = 1, .minor = 0 },
59 static void vnet_get_drvinfo(struct net_device *dev,
60 struct ethtool_drvinfo *info)
62 strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
63 strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
66 static u32 vnet_get_msglevel(struct net_device *dev)
68 struct vnet *vp = netdev_priv(dev);
70 return vp->msg_enable;
73 static void vnet_set_msglevel(struct net_device *dev, u32 value)
75 struct vnet *vp = netdev_priv(dev);
77 vp->msg_enable = value;
81 const char string[ETH_GSTRING_LEN];
82 } ethtool_stats_keys[] = {
92 { "rx_length_errors" },
93 { "rx_frame_errors" },
94 { "rx_missed_errors" },
95 { "tx_carrier_errors" },
99 static int vnet_get_sset_count(struct net_device *dev, int sset)
101 struct vnet *vp = (struct vnet *)netdev_priv(dev);
105 return ARRAY_SIZE(ethtool_stats_keys)
106 + (NUM_VNET_PORT_STATS * vp->nports);
112 static void vnet_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
114 struct vnet *vp = (struct vnet *)netdev_priv(dev);
115 struct vnet_port *port;
116 char *p = (char *)buf;
120 memcpy(buf, ðtool_stats_keys, sizeof(ethtool_stats_keys));
121 p += sizeof(ethtool_stats_keys);
124 list_for_each_entry_rcu(port, &vp->port_list, list) {
125 snprintf(p, ETH_GSTRING_LEN, "p%u.%s-%pM",
126 port->q_index, port->switch_port ? "s" : "q",
128 p += ETH_GSTRING_LEN;
129 snprintf(p, ETH_GSTRING_LEN, "p%u.rx_packets",
131 p += ETH_GSTRING_LEN;
132 snprintf(p, ETH_GSTRING_LEN, "p%u.tx_packets",
134 p += ETH_GSTRING_LEN;
135 snprintf(p, ETH_GSTRING_LEN, "p%u.rx_bytes",
137 p += ETH_GSTRING_LEN;
138 snprintf(p, ETH_GSTRING_LEN, "p%u.tx_bytes",
140 p += ETH_GSTRING_LEN;
141 snprintf(p, ETH_GSTRING_LEN, "p%u.event_up",
143 p += ETH_GSTRING_LEN;
144 snprintf(p, ETH_GSTRING_LEN, "p%u.event_reset",
146 p += ETH_GSTRING_LEN;
156 static void vnet_get_ethtool_stats(struct net_device *dev,
157 struct ethtool_stats *estats, u64 *data)
159 struct vnet *vp = (struct vnet *)netdev_priv(dev);
160 struct vnet_port *port;
163 data[i++] = dev->stats.rx_packets;
164 data[i++] = dev->stats.tx_packets;
165 data[i++] = dev->stats.rx_bytes;
166 data[i++] = dev->stats.tx_bytes;
167 data[i++] = dev->stats.rx_errors;
168 data[i++] = dev->stats.tx_errors;
169 data[i++] = dev->stats.rx_dropped;
170 data[i++] = dev->stats.tx_dropped;
171 data[i++] = dev->stats.multicast;
172 data[i++] = dev->stats.rx_length_errors;
173 data[i++] = dev->stats.rx_frame_errors;
174 data[i++] = dev->stats.rx_missed_errors;
175 data[i++] = dev->stats.tx_carrier_errors;
176 data[i++] = vp->nports;
179 list_for_each_entry_rcu(port, &vp->port_list, list) {
180 data[i++] = port->q_index;
181 data[i++] = port->stats.rx_packets;
182 data[i++] = port->stats.tx_packets;
183 data[i++] = port->stats.rx_bytes;
184 data[i++] = port->stats.tx_bytes;
185 data[i++] = port->stats.event_up;
186 data[i++] = port->stats.event_reset;
191 static const struct ethtool_ops vnet_ethtool_ops = {
192 .get_drvinfo = vnet_get_drvinfo,
193 .get_msglevel = vnet_get_msglevel,
194 .set_msglevel = vnet_set_msglevel,
195 .get_link = ethtool_op_get_link,
196 .get_sset_count = vnet_get_sset_count,
197 .get_strings = vnet_get_strings,
198 .get_ethtool_stats = vnet_get_ethtool_stats,
201 static LIST_HEAD(vnet_list);
202 static DEFINE_MUTEX(vnet_list_mutex);
204 static struct vnet_port *__tx_port_find(struct vnet *vp, struct sk_buff *skb)
206 unsigned int hash = vnet_hashfn(skb->data);
207 struct hlist_head *hp = &vp->port_hash[hash];
208 struct vnet_port *port;
210 hlist_for_each_entry_rcu(port, hp, hash) {
211 if (!sunvnet_port_is_up_common(port))
213 if (ether_addr_equal(port->raddr, skb->data))
216 list_for_each_entry_rcu(port, &vp->port_list, list) {
217 if (!port->switch_port)
219 if (!sunvnet_port_is_up_common(port))
226 /* func arg to vnet_start_xmit_common() to get the proper tx port */
227 static struct vnet_port *vnet_tx_port_find(struct sk_buff *skb,
228 struct net_device *dev)
230 struct vnet *vp = netdev_priv(dev);
232 return __tx_port_find(vp, skb);
235 static u16 vnet_select_queue(struct net_device *dev, struct sk_buff *skb,
236 void *accel_priv, select_queue_fallback_t fallback)
238 struct vnet *vp = netdev_priv(dev);
239 struct vnet_port *port = __tx_port_find(vp, skb);
244 return port->q_index;
247 /* Wrappers to common functions */
248 static netdev_tx_t vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
250 return sunvnet_start_xmit_common(skb, dev, vnet_tx_port_find);
253 static void vnet_set_rx_mode(struct net_device *dev)
255 struct vnet *vp = netdev_priv(dev);
257 return sunvnet_set_rx_mode_common(dev, vp);
260 #ifdef CONFIG_NET_POLL_CONTROLLER
261 static void vnet_poll_controller(struct net_device *dev)
263 struct vnet *vp = netdev_priv(dev);
265 return sunvnet_poll_controller_common(dev, vp);
269 static const struct net_device_ops vnet_ops = {
270 .ndo_open = sunvnet_open_common,
271 .ndo_stop = sunvnet_close_common,
272 .ndo_set_rx_mode = vnet_set_rx_mode,
273 .ndo_set_mac_address = sunvnet_set_mac_addr_common,
274 .ndo_validate_addr = eth_validate_addr,
275 .ndo_tx_timeout = sunvnet_tx_timeout_common,
276 .ndo_start_xmit = vnet_start_xmit,
277 .ndo_select_queue = vnet_select_queue,
278 #ifdef CONFIG_NET_POLL_CONTROLLER
279 .ndo_poll_controller = vnet_poll_controller,
283 static struct vnet *vnet_new(const u64 *local_mac,
284 struct vio_dev *vdev)
286 struct net_device *dev;
290 dev = alloc_etherdev_mqs(sizeof(*vp), VNET_MAX_TXQS, 1);
292 return ERR_PTR(-ENOMEM);
293 dev->needed_headroom = VNET_PACKET_SKIP + 8;
294 dev->needed_tailroom = 8;
296 for (i = 0; i < ETH_ALEN; i++)
297 dev->dev_addr[i] = (*local_mac >> (5 - i) * 8) & 0xff;
299 vp = netdev_priv(dev);
301 spin_lock_init(&vp->lock);
304 INIT_LIST_HEAD(&vp->port_list);
305 for (i = 0; i < VNET_PORT_HASH_SIZE; i++)
306 INIT_HLIST_HEAD(&vp->port_hash[i]);
307 INIT_LIST_HEAD(&vp->list);
308 vp->local_mac = *local_mac;
310 dev->netdev_ops = &vnet_ops;
311 dev->ethtool_ops = &vnet_ethtool_ops;
312 dev->watchdog_timeo = VNET_TX_TIMEOUT;
314 dev->hw_features = NETIF_F_TSO | NETIF_F_GSO | NETIF_F_ALL_TSO |
315 NETIF_F_HW_CSUM | NETIF_F_SG;
316 dev->features = dev->hw_features;
318 /* MTU range: 68 - 65535 */
319 dev->min_mtu = ETH_MIN_MTU;
320 dev->max_mtu = VNET_MAX_MTU;
322 SET_NETDEV_DEV(dev, &vdev->dev);
324 err = register_netdev(dev);
326 pr_err("Cannot register net device, aborting\n");
327 goto err_out_free_dev;
330 netdev_info(dev, "Sun LDOM vnet %pM\n", dev->dev_addr);
332 list_add(&vp->list, &vnet_list);
342 static struct vnet *vnet_find_or_create(const u64 *local_mac,
343 struct vio_dev *vdev)
345 struct vnet *iter, *vp;
347 mutex_lock(&vnet_list_mutex);
349 list_for_each_entry(iter, &vnet_list, list) {
350 if (iter->local_mac == *local_mac) {
356 vp = vnet_new(local_mac, vdev);
357 mutex_unlock(&vnet_list_mutex);
362 static void vnet_cleanup(void)
365 struct net_device *dev;
367 mutex_lock(&vnet_list_mutex);
368 while (!list_empty(&vnet_list)) {
369 vp = list_first_entry(&vnet_list, struct vnet, list);
372 /* vio_unregister_driver() should have cleaned up port_list */
373 BUG_ON(!list_empty(&vp->port_list));
374 unregister_netdev(dev);
377 mutex_unlock(&vnet_list_mutex);
380 static const char *local_mac_prop = "local-mac-address";
382 static struct vnet *vnet_find_parent(struct mdesc_handle *hp,
384 struct vio_dev *vdev)
386 const u64 *local_mac = NULL;
389 mdesc_for_each_arc(a, hp, port_node, MDESC_ARC_TYPE_BACK) {
390 u64 target = mdesc_arc_target(hp, a);
393 name = mdesc_get_property(hp, target, "name", NULL);
394 if (!name || strcmp(name, "network"))
397 local_mac = mdesc_get_property(hp, target,
398 local_mac_prop, NULL);
403 return ERR_PTR(-ENODEV);
405 return vnet_find_or_create(local_mac, vdev);
408 static struct ldc_channel_config vnet_ldc_cfg = {
409 .event = sunvnet_event_common,
411 .mode = LDC_MODE_UNRELIABLE,
414 static struct vio_driver_ops vnet_vio_ops = {
415 .send_attr = sunvnet_send_attr_common,
416 .handle_attr = sunvnet_handle_attr_common,
417 .handshake_complete = sunvnet_handshake_complete_common,
420 const char *remote_macaddr_prop = "remote-mac-address";
422 static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
424 struct mdesc_handle *hp;
425 struct vnet_port *port;
429 int len, i, err, switch_port;
433 vp = vnet_find_parent(hp, vdev->mp, vdev);
435 pr_err("Cannot find port parent vnet\n");
437 goto err_out_put_mdesc;
440 rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len);
443 pr_err("Port lacks %s property\n", remote_macaddr_prop);
444 goto err_out_put_mdesc;
447 port = kzalloc(sizeof(*port), GFP_KERNEL);
450 goto err_out_put_mdesc;
452 for (i = 0; i < ETH_ALEN; i++)
453 port->raddr[i] = (*rmac >> (5 - i) * 8) & 0xff;
457 err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK,
458 vnet_versions, ARRAY_SIZE(vnet_versions),
459 &vnet_vio_ops, vp->dev->name);
461 goto err_out_free_port;
463 err = vio_ldc_alloc(&port->vio, &vnet_ldc_cfg, port);
465 goto err_out_free_port;
467 netif_napi_add(port->vp->dev, &port->napi, sunvnet_poll_common,
470 INIT_HLIST_NODE(&port->hash);
471 INIT_LIST_HEAD(&port->list);
474 if (mdesc_get_property(hp, vdev->mp, "switch-port", NULL))
476 port->switch_port = switch_port;
480 spin_lock_irqsave(&vp->lock, flags);
482 list_add_rcu(&port->list, &vp->port_list);
484 list_add_tail_rcu(&port->list, &vp->port_list);
485 hlist_add_head_rcu(&port->hash,
486 &vp->port_hash[vnet_hashfn(port->raddr)]);
487 sunvnet_port_add_txq_common(port);
488 spin_unlock_irqrestore(&vp->lock, flags);
490 dev_set_drvdata(&vdev->dev, port);
492 pr_info("%s: PORT ( remote-mac %pM%s )\n",
493 vp->dev->name, port->raddr, switch_port ? " switch-port" : "");
495 setup_timer(&port->clean_timer, sunvnet_clean_timer_expire_common,
496 (unsigned long)port);
498 napi_enable(&port->napi);
499 vio_port_up(&port->vio);
513 static int vnet_port_remove(struct vio_dev *vdev)
515 struct vnet_port *port = dev_get_drvdata(&vdev->dev);
518 del_timer_sync(&port->vio.timer);
520 napi_disable(&port->napi);
522 list_del_rcu(&port->list);
523 hlist_del_rcu(&port->hash);
526 del_timer_sync(&port->clean_timer);
527 sunvnet_port_rm_txq_common(port);
528 netif_napi_del(&port->napi);
529 sunvnet_port_free_tx_bufs_common(port);
530 vio_ldc_free(&port->vio);
532 dev_set_drvdata(&vdev->dev, NULL);
539 static const struct vio_device_id vnet_port_match[] = {
545 MODULE_DEVICE_TABLE(vio, vnet_port_match);
547 static struct vio_driver vnet_port_driver = {
548 .id_table = vnet_port_match,
549 .probe = vnet_port_probe,
550 .remove = vnet_port_remove,
554 static int __init vnet_init(void)
556 pr_info("%s\n", version);
557 return vio_register_driver(&vnet_port_driver);
560 static void __exit vnet_exit(void)
562 vio_unregister_driver(&vnet_port_driver);
566 module_init(vnet_init);
567 module_exit(vnet_exit);