1 /* ldmvsw.c: Sun4v LDOM Virtual Switch Driver.
3 * Copyright (C) 2016 Oracle. All rights reserved.
6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8 #include <linux/delay.h>
9 #include <linux/etherdevice.h>
10 #include <linux/ethtool.h>
11 #include <linux/highmem.h>
12 #include <linux/if_vlan.h>
13 #include <linux/init.h>
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/mutex.h>
17 #include <linux/netdevice.h>
18 #include <linux/slab.h>
19 #include <linux/types.h>
21 #if defined(CONFIG_IPV6)
22 #include <linux/icmpv6.h>
27 #include <net/route.h>
32 /* This driver makes use of the common code in sunvnet_common.c */
33 #include "sunvnet_common.h"
35 /* Length of time before we decide the hardware is hung,
36 * and dev->tx_timeout() should be called to fix the problem.
38 #define VSW_TX_TIMEOUT (10 * HZ)
40 /* Static HW Addr used for the network interfaces representing vsw ports */
41 static u8 vsw_port_hwaddr[ETH_ALEN] = {0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
43 #define DRV_MODULE_NAME "ldmvsw"
44 #define DRV_MODULE_VERSION "1.0"
45 #define DRV_MODULE_RELDATE "Jan 15, 2016"
47 static char version[] =
48 DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
49 MODULE_AUTHOR("Oracle");
50 MODULE_DESCRIPTION("Sun4v LDOM Virtual Switch Driver");
51 MODULE_LICENSE("GPL");
52 MODULE_VERSION(DRV_MODULE_VERSION);
54 /* Ordered from largest major to lowest */
55 static struct vio_version vsw_versions[] = {
56 { .major = 1, .minor = 8 },
57 { .major = 1, .minor = 7 },
58 { .major = 1, .minor = 6 },
59 { .major = 1, .minor = 0 },
62 static void vsw_get_drvinfo(struct net_device *dev,
63 struct ethtool_drvinfo *info)
65 strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
66 strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
69 static u32 vsw_get_msglevel(struct net_device *dev)
71 struct vnet_port *port = netdev_priv(dev);
73 return port->vp->msg_enable;
76 static void vsw_set_msglevel(struct net_device *dev, u32 value)
78 struct vnet_port *port = netdev_priv(dev);
80 port->vp->msg_enable = value;
83 static const struct ethtool_ops vsw_ethtool_ops = {
84 .get_drvinfo = vsw_get_drvinfo,
85 .get_msglevel = vsw_get_msglevel,
86 .set_msglevel = vsw_set_msglevel,
87 .get_link = ethtool_op_get_link,
90 static LIST_HEAD(vnet_list);
91 static DEFINE_MUTEX(vnet_list_mutex);
93 /* func arg to vnet_start_xmit_common() to get the proper tx port */
94 static struct vnet_port *vsw_tx_port_find(struct sk_buff *skb,
95 struct net_device *dev)
97 struct vnet_port *port = netdev_priv(dev);
102 static u16 vsw_select_queue(struct net_device *dev, struct sk_buff *skb,
103 void *accel_priv, select_queue_fallback_t fallback)
105 struct vnet_port *port = netdev_priv(dev);
110 return port->q_index;
113 /* Wrappers to common functions */
114 static int vsw_start_xmit(struct sk_buff *skb, struct net_device *dev)
116 return sunvnet_start_xmit_common(skb, dev, vsw_tx_port_find);
119 static void vsw_set_rx_mode(struct net_device *dev)
121 struct vnet_port *port = netdev_priv(dev);
123 return sunvnet_set_rx_mode_common(dev, port->vp);
126 #ifdef CONFIG_NET_POLL_CONTROLLER
127 static void vsw_poll_controller(struct net_device *dev)
129 struct vnet_port *port = netdev_priv(dev);
131 return sunvnet_poll_controller_common(dev, port->vp);
135 static const struct net_device_ops vsw_ops = {
136 .ndo_open = sunvnet_open_common,
137 .ndo_stop = sunvnet_close_common,
138 .ndo_set_rx_mode = vsw_set_rx_mode,
139 .ndo_set_mac_address = sunvnet_set_mac_addr_common,
140 .ndo_validate_addr = eth_validate_addr,
141 .ndo_tx_timeout = sunvnet_tx_timeout_common,
142 .ndo_change_mtu = sunvnet_change_mtu_common,
143 .ndo_start_xmit = vsw_start_xmit,
144 .ndo_select_queue = vsw_select_queue,
145 #ifdef CONFIG_NET_POLL_CONTROLLER
146 .ndo_poll_controller = vsw_poll_controller,
150 static const char *local_mac_prop = "local-mac-address";
151 static const char *cfg_handle_prop = "cfg-handle";
153 static struct vnet *vsw_get_vnet(struct mdesc_handle *hp,
159 const u64 *local_mac = NULL;
160 const u64 *cfghandle = NULL;
163 /* Get the parent virtual-network-switch macaddr and cfghandle */
164 mdesc_for_each_arc(a, hp, port_node, MDESC_ARC_TYPE_BACK) {
165 u64 target = mdesc_arc_target(hp, a);
168 name = mdesc_get_property(hp, target, "name", NULL);
169 if (!name || strcmp(name, "virtual-network-switch"))
172 local_mac = mdesc_get_property(hp, target,
173 local_mac_prop, NULL);
174 cfghandle = mdesc_get_property(hp, target,
175 cfg_handle_prop, NULL);
178 if (!local_mac || !cfghandle)
179 return ERR_PTR(-ENODEV);
181 /* find or create associated vnet */
183 mutex_lock(&vnet_list_mutex);
184 list_for_each_entry(iter, &vnet_list, list) {
185 if (iter->local_mac == *local_mac) {
192 vp = kzalloc(sizeof(*vp), GFP_KERNEL);
194 mutex_unlock(&vnet_list_mutex);
195 return ERR_PTR(-ENOMEM);
198 spin_lock_init(&vp->lock);
199 INIT_LIST_HEAD(&vp->port_list);
200 INIT_LIST_HEAD(&vp->list);
201 vp->local_mac = *local_mac;
202 list_add(&vp->list, &vnet_list);
205 mutex_unlock(&vnet_list_mutex);
207 *handle = (u64)*cfghandle;
212 static struct net_device *vsw_alloc_netdev(u8 hwaddr[],
213 struct vio_dev *vdev,
217 struct net_device *dev;
218 struct vnet_port *port;
221 dev = alloc_etherdev_mqs(sizeof(*port), VNET_MAX_TXQS, 1);
223 return ERR_PTR(-ENOMEM);
224 dev->needed_headroom = VNET_PACKET_SKIP + 8;
225 dev->needed_tailroom = 8;
227 for (i = 0; i < ETH_ALEN; i++) {
228 dev->dev_addr[i] = hwaddr[i];
229 dev->perm_addr[i] = dev->dev_addr[i];
232 sprintf(dev->name, "vif%d.%d", (int)handle, (int)port_id);
234 dev->netdev_ops = &vsw_ops;
235 dev->ethtool_ops = &vsw_ethtool_ops;
236 dev->watchdog_timeo = VSW_TX_TIMEOUT;
238 dev->hw_features = NETIF_F_TSO | NETIF_F_GSO | NETIF_F_GSO_SOFTWARE |
239 NETIF_F_HW_CSUM | NETIF_F_SG;
240 dev->features = dev->hw_features;
242 SET_NETDEV_DEV(dev, &vdev->dev);
247 static struct ldc_channel_config vsw_ldc_cfg = {
248 .event = sunvnet_event_common,
250 .mode = LDC_MODE_UNRELIABLE,
253 static struct vio_driver_ops vsw_vio_ops = {
254 .send_attr = sunvnet_send_attr_common,
255 .handle_attr = sunvnet_handle_attr_common,
256 .handshake_complete = sunvnet_handshake_complete_common,
259 static void print_version(void)
261 printk_once(KERN_INFO "%s", version);
264 static const char *remote_macaddr_prop = "remote-mac-address";
265 static const char *id_prop = "id";
267 static int vsw_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
269 struct mdesc_handle *hp;
270 struct vnet_port *port;
273 struct net_device *dev;
283 rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len);
286 pr_err("Port lacks %s property\n", remote_macaddr_prop);
291 port_id = mdesc_get_property(hp, vdev->mp, id_prop, NULL);
294 pr_err("Port lacks %s property\n", id_prop);
299 /* Get (or create) the vnet associated with this port */
300 vp = vsw_get_vnet(hp, vdev->mp, &handle);
301 if (unlikely(IS_ERR(vp))) {
303 pr_err("Failed to get vnet for vsw-port\n");
310 dev = vsw_alloc_netdev(vsw_port_hwaddr, vdev, handle, *port_id);
313 pr_err("Failed to alloc netdev for vsw-port\n");
317 port = netdev_priv(dev);
319 INIT_LIST_HEAD(&port->list);
321 for (i = 0; i < ETH_ALEN; i++)
322 port->raddr[i] = (*rmac >> (5 - i) * 8) & 0xff;
326 port->switch_port = 1;
330 /* Mark the port as belonging to ldmvsw which directs the
331 * the common code to use the net_device in the vnet_port
332 * rather than the net_device in the vnet (which is used
333 * by sunvnet). This bit is used by the VNET_PORT_TO_NET_DEVICE
338 err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK,
339 vsw_versions, ARRAY_SIZE(vsw_versions),
340 &vsw_vio_ops, dev->name);
342 goto err_out_free_dev;
344 err = vio_ldc_alloc(&port->vio, &vsw_ldc_cfg, port);
346 goto err_out_free_dev;
348 dev_set_drvdata(&vdev->dev, port);
350 netif_napi_add(dev, &port->napi, sunvnet_poll_common,
353 spin_lock_irqsave(&vp->lock, flags);
354 list_add_rcu(&port->list, &vp->port_list);
355 spin_unlock_irqrestore(&vp->lock, flags);
357 setup_timer(&port->clean_timer, sunvnet_clean_timer_expire_common,
358 (unsigned long)port);
360 err = register_netdev(dev);
362 pr_err("Cannot register net device, aborting\n");
363 goto err_out_del_timer;
366 spin_lock_irqsave(&vp->lock, flags);
367 sunvnet_port_add_txq_common(port);
368 spin_unlock_irqrestore(&vp->lock, flags);
370 napi_enable(&port->napi);
371 vio_port_up(&port->vio);
373 netdev_info(dev, "LDOM vsw-port %pM\n", dev->dev_addr);
375 pr_info("%s: PORT ( remote-mac %pM%s )\n", dev->name,
376 port->raddr, " switch-port");
381 del_timer_sync(&port->clean_timer);
382 list_del_rcu(&port->list);
384 netif_napi_del(&port->napi);
385 dev_set_drvdata(&vdev->dev, NULL);
386 vio_ldc_free(&port->vio);
393 static int vsw_port_remove(struct vio_dev *vdev)
395 struct vnet_port *port = dev_get_drvdata(&vdev->dev);
399 del_timer_sync(&port->vio.timer);
401 napi_disable(&port->napi);
403 list_del_rcu(&port->list);
406 del_timer_sync(&port->clean_timer);
407 spin_lock_irqsave(&port->vp->lock, flags);
408 sunvnet_port_rm_txq_common(port);
409 spin_unlock_irqrestore(&port->vp->lock, flags);
410 netif_napi_del(&port->napi);
411 sunvnet_port_free_tx_bufs_common(port);
412 vio_ldc_free(&port->vio);
414 dev_set_drvdata(&vdev->dev, NULL);
416 unregister_netdev(port->dev);
417 free_netdev(port->dev);
423 static void vsw_cleanup(void)
427 /* just need to free up the vnet list */
428 mutex_lock(&vnet_list_mutex);
429 while (!list_empty(&vnet_list)) {
430 vp = list_first_entry(&vnet_list, struct vnet, list);
432 /* vio_unregister_driver() should have cleaned up port_list */
433 if (!list_empty(&vp->port_list))
434 pr_err("Ports not removed by VIO subsystem!\n");
437 mutex_unlock(&vnet_list_mutex);
440 static const struct vio_device_id vsw_port_match[] = {
446 MODULE_DEVICE_TABLE(vio, vsw_port_match);
448 static struct vio_driver vsw_port_driver = {
449 .id_table = vsw_port_match,
450 .probe = vsw_port_probe,
451 .remove = vsw_port_remove,
455 static int __init vsw_init(void)
457 return vio_register_driver(&vsw_port_driver);
460 static void __exit vsw_exit(void)
462 vio_unregister_driver(&vsw_port_driver);
466 module_init(vsw_init);
467 module_exit(vsw_exit);