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5
6#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7
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/kconfig.h>
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/mutex.h>
18#include <linux/netdevice.h>
19#include <linux/slab.h>
20#include <linux/types.h>
21
22#if defined(CONFIG_IPV6)
23#include <linux/icmpv6.h>
24#endif
25
26#include <net/ip.h>
27#include <net/icmp.h>
28#include <net/route.h>
29
30#include <asm/vio.h>
31#include <asm/ldc.h>
32
33
34#include "sunvnet_common.h"
35
36
37
38
39#define VSW_TX_TIMEOUT (10 * HZ)
40
41
42static u8 vsw_port_hwaddr[ETH_ALEN] = {0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
43
44#define DRV_MODULE_NAME "ldmvsw"
45#define DRV_MODULE_VERSION "1.0"
46#define DRV_MODULE_RELDATE "Jan 15, 2016"
47
48static char version[] =
49 DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
50MODULE_AUTHOR("Oracle");
51MODULE_DESCRIPTION("Sun4v LDOM Virtual Switch Driver");
52MODULE_LICENSE("GPL");
53MODULE_VERSION(DRV_MODULE_VERSION);
54
55
56static struct vio_version vsw_versions[] = {
57 { .major = 1, .minor = 8 },
58 { .major = 1, .minor = 7 },
59 { .major = 1, .minor = 6 },
60 { .major = 1, .minor = 0 },
61};
62
63static void vsw_get_drvinfo(struct net_device *dev,
64 struct ethtool_drvinfo *info)
65{
66 strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
67 strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
68}
69
70static u32 vsw_get_msglevel(struct net_device *dev)
71{
72 struct vnet_port *port = netdev_priv(dev);
73
74 return port->vp->msg_enable;
75}
76
77static void vsw_set_msglevel(struct net_device *dev, u32 value)
78{
79 struct vnet_port *port = netdev_priv(dev);
80
81 port->vp->msg_enable = value;
82}
83
84static const struct ethtool_ops vsw_ethtool_ops = {
85 .get_drvinfo = vsw_get_drvinfo,
86 .get_msglevel = vsw_get_msglevel,
87 .set_msglevel = vsw_set_msglevel,
88 .get_link = ethtool_op_get_link,
89};
90
91static LIST_HEAD(vnet_list);
92static DEFINE_MUTEX(vnet_list_mutex);
93
94
95static struct vnet_port *vsw_tx_port_find(struct sk_buff *skb,
96 struct net_device *dev)
97{
98 struct vnet_port *port = netdev_priv(dev);
99
100 return port;
101}
102
103static u16 vsw_select_queue(struct net_device *dev, struct sk_buff *skb,
104 void *accel_priv, select_queue_fallback_t fallback)
105{
106 struct vnet_port *port = netdev_priv(dev);
107
108 if (!port)
109 return 0;
110
111 return port->q_index;
112}
113
114
115static int vsw_start_xmit(struct sk_buff *skb, struct net_device *dev)
116{
117 return sunvnet_start_xmit_common(skb, dev, vsw_tx_port_find);
118}
119
120static void vsw_set_rx_mode(struct net_device *dev)
121{
122 struct vnet_port *port = netdev_priv(dev);
123
124 return sunvnet_set_rx_mode_common(dev, port->vp);
125}
126
127#ifdef CONFIG_NET_POLL_CONTROLLER
128static void vsw_poll_controller(struct net_device *dev)
129{
130 struct vnet_port *port = netdev_priv(dev);
131
132 return sunvnet_poll_controller_common(dev, port->vp);
133}
134#endif
135
136static const struct net_device_ops vsw_ops = {
137 .ndo_open = sunvnet_open_common,
138 .ndo_stop = sunvnet_close_common,
139 .ndo_set_rx_mode = vsw_set_rx_mode,
140 .ndo_set_mac_address = sunvnet_set_mac_addr_common,
141 .ndo_validate_addr = eth_validate_addr,
142 .ndo_tx_timeout = sunvnet_tx_timeout_common,
143 .ndo_change_mtu = sunvnet_change_mtu_common,
144 .ndo_start_xmit = vsw_start_xmit,
145 .ndo_select_queue = vsw_select_queue,
146#ifdef CONFIG_NET_POLL_CONTROLLER
147 .ndo_poll_controller = vsw_poll_controller,
148#endif
149};
150
151static const char *local_mac_prop = "local-mac-address";
152static const char *cfg_handle_prop = "cfg-handle";
153
154static struct vnet *vsw_get_vnet(struct mdesc_handle *hp,
155 u64 port_node,
156 u64 *handle)
157{
158 struct vnet *vp;
159 struct vnet *iter;
160 const u64 *local_mac = NULL;
161 const u64 *cfghandle = NULL;
162 u64 a;
163
164
165 mdesc_for_each_arc(a, hp, port_node, MDESC_ARC_TYPE_BACK) {
166 u64 target = mdesc_arc_target(hp, a);
167 const char *name;
168
169 name = mdesc_get_property(hp, target, "name", NULL);
170 if (!name || strcmp(name, "virtual-network-switch"))
171 continue;
172
173 local_mac = mdesc_get_property(hp, target,
174 local_mac_prop, NULL);
175 cfghandle = mdesc_get_property(hp, target,
176 cfg_handle_prop, NULL);
177 break;
178 }
179 if (!local_mac || !cfghandle)
180 return ERR_PTR(-ENODEV);
181
182
183 vp = NULL;
184 mutex_lock(&vnet_list_mutex);
185 list_for_each_entry(iter, &vnet_list, list) {
186 if (iter->local_mac == *local_mac) {
187 vp = iter;
188 break;
189 }
190 }
191
192 if (!vp) {
193 vp = kzalloc(sizeof(*vp), GFP_KERNEL);
194 if (unlikely(!vp)) {
195 mutex_unlock(&vnet_list_mutex);
196 return ERR_PTR(-ENOMEM);
197 }
198
199 spin_lock_init(&vp->lock);
200 INIT_LIST_HEAD(&vp->port_list);
201 INIT_LIST_HEAD(&vp->list);
202 vp->local_mac = *local_mac;
203 list_add(&vp->list, &vnet_list);
204 }
205
206 mutex_unlock(&vnet_list_mutex);
207
208 *handle = (u64)*cfghandle;
209
210 return vp;
211}
212
213static struct net_device *vsw_alloc_netdev(u8 hwaddr[],
214 struct vio_dev *vdev,
215 u64 handle,
216 u64 port_id)
217{
218 struct net_device *dev;
219 struct vnet_port *port;
220 int i;
221
222 dev = alloc_etherdev_mqs(sizeof(*port), VNET_MAX_TXQS, 1);
223 if (!dev)
224 return ERR_PTR(-ENOMEM);
225 dev->needed_headroom = VNET_PACKET_SKIP + 8;
226 dev->needed_tailroom = 8;
227
228 for (i = 0; i < ETH_ALEN; i++) {
229 dev->dev_addr[i] = hwaddr[i];
230 dev->perm_addr[i] = dev->dev_addr[i];
231 }
232
233 sprintf(dev->name, "vif%d.%d", (int)handle, (int)port_id);
234
235 dev->netdev_ops = &vsw_ops;
236 dev->ethtool_ops = &vsw_ethtool_ops;
237 dev->watchdog_timeo = VSW_TX_TIMEOUT;
238
239 dev->hw_features = NETIF_F_TSO | NETIF_F_GSO | NETIF_F_GSO_SOFTWARE |
240 NETIF_F_HW_CSUM | NETIF_F_SG;
241 dev->features = dev->hw_features;
242
243 SET_NETDEV_DEV(dev, &vdev->dev);
244
245 return dev;
246}
247
248static struct ldc_channel_config vsw_ldc_cfg = {
249 .event = sunvnet_event_common,
250 .mtu = 64,
251 .mode = LDC_MODE_UNRELIABLE,
252};
253
254static struct vio_driver_ops vsw_vio_ops = {
255 .send_attr = sunvnet_send_attr_common,
256 .handle_attr = sunvnet_handle_attr_common,
257 .handshake_complete = sunvnet_handshake_complete_common,
258};
259
260static void print_version(void)
261{
262 printk_once(KERN_INFO "%s", version);
263}
264
265static const char *remote_macaddr_prop = "remote-mac-address";
266static const char *id_prop = "id";
267
268static int vsw_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
269{
270 struct mdesc_handle *hp;
271 struct vnet_port *port;
272 unsigned long flags;
273 struct vnet *vp;
274 struct net_device *dev;
275 const u64 *rmac;
276 int len, i, err;
277 const u64 *port_id;
278 u64 handle;
279
280 print_version();
281
282 hp = mdesc_grab();
283
284 rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len);
285 err = -ENODEV;
286 if (!rmac) {
287 pr_err("Port lacks %s property\n", remote_macaddr_prop);
288 mdesc_release(hp);
289 return err;
290 }
291
292 port_id = mdesc_get_property(hp, vdev->mp, id_prop, NULL);
293 err = -ENODEV;
294 if (!port_id) {
295 pr_err("Port lacks %s property\n", id_prop);
296 mdesc_release(hp);
297 return err;
298 }
299
300
301 vp = vsw_get_vnet(hp, vdev->mp, &handle);
302 if (unlikely(IS_ERR(vp))) {
303 err = PTR_ERR(vp);
304 pr_err("Failed to get vnet for vsw-port\n");
305 mdesc_release(hp);
306 return err;
307 }
308
309 mdesc_release(hp);
310
311 dev = vsw_alloc_netdev(vsw_port_hwaddr, vdev, handle, *port_id);
312 if (IS_ERR(dev)) {
313 err = PTR_ERR(dev);
314 pr_err("Failed to alloc netdev for vsw-port\n");
315 return err;
316 }
317
318 port = netdev_priv(dev);
319
320 INIT_LIST_HEAD(&port->list);
321
322 for (i = 0; i < ETH_ALEN; i++)
323 port->raddr[i] = (*rmac >> (5 - i) * 8) & 0xff;
324
325 port->vp = vp;
326 port->dev = dev;
327 port->switch_port = 1;
328 port->tso = true;
329 port->tsolen = 0;
330
331
332
333
334
335
336
337 port->vsw = 1;
338
339 err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK,
340 vsw_versions, ARRAY_SIZE(vsw_versions),
341 &vsw_vio_ops, dev->name);
342 if (err)
343 goto err_out_free_dev;
344
345 err = vio_ldc_alloc(&port->vio, &vsw_ldc_cfg, port);
346 if (err)
347 goto err_out_free_dev;
348
349 dev_set_drvdata(&vdev->dev, port);
350
351 netif_napi_add(dev, &port->napi, sunvnet_poll_common,
352 NAPI_POLL_WEIGHT);
353
354 spin_lock_irqsave(&vp->lock, flags);
355 list_add_rcu(&port->list, &vp->port_list);
356 spin_unlock_irqrestore(&vp->lock, flags);
357
358 setup_timer(&port->clean_timer, sunvnet_clean_timer_expire_common,
359 (unsigned long)port);
360
361 err = register_netdev(dev);
362 if (err) {
363 pr_err("Cannot register net device, aborting\n");
364 goto err_out_del_timer;
365 }
366
367 spin_lock_irqsave(&vp->lock, flags);
368 sunvnet_port_add_txq_common(port);
369 spin_unlock_irqrestore(&vp->lock, flags);
370
371 napi_enable(&port->napi);
372 vio_port_up(&port->vio);
373
374 netdev_info(dev, "LDOM vsw-port %pM\n", dev->dev_addr);
375
376 pr_info("%s: PORT ( remote-mac %pM%s )\n", dev->name,
377 port->raddr, " switch-port");
378
379 return 0;
380
381err_out_del_timer:
382 del_timer_sync(&port->clean_timer);
383 list_del_rcu(&port->list);
384 synchronize_rcu();
385 netif_napi_del(&port->napi);
386 dev_set_drvdata(&vdev->dev, NULL);
387 vio_ldc_free(&port->vio);
388
389err_out_free_dev:
390 free_netdev(dev);
391 return err;
392}
393
394static int vsw_port_remove(struct vio_dev *vdev)
395{
396 struct vnet_port *port = dev_get_drvdata(&vdev->dev);
397 unsigned long flags;
398
399 if (port) {
400 del_timer_sync(&port->vio.timer);
401
402 napi_disable(&port->napi);
403
404 list_del_rcu(&port->list);
405
406 synchronize_rcu();
407 del_timer_sync(&port->clean_timer);
408 spin_lock_irqsave(&port->vp->lock, flags);
409 sunvnet_port_rm_txq_common(port);
410 spin_unlock_irqrestore(&port->vp->lock, flags);
411 netif_napi_del(&port->napi);
412 sunvnet_port_free_tx_bufs_common(port);
413 vio_ldc_free(&port->vio);
414
415 dev_set_drvdata(&vdev->dev, NULL);
416
417 unregister_netdev(port->dev);
418 free_netdev(port->dev);
419 }
420
421 return 0;
422}
423
424static void vsw_cleanup(void)
425{
426 struct vnet *vp;
427
428
429 mutex_lock(&vnet_list_mutex);
430 while (!list_empty(&vnet_list)) {
431 vp = list_first_entry(&vnet_list, struct vnet, list);
432 list_del(&vp->list);
433
434 if (!list_empty(&vp->port_list))
435 pr_err("Ports not removed by VIO subsystem!\n");
436 kfree(vp);
437 }
438 mutex_unlock(&vnet_list_mutex);
439}
440
441static const struct vio_device_id vsw_port_match[] = {
442 {
443 .type = "vsw-port",
444 },
445 {},
446};
447MODULE_DEVICE_TABLE(vio, vsw_port_match);
448
449static struct vio_driver vsw_port_driver = {
450 .id_table = vsw_port_match,
451 .probe = vsw_port_probe,
452 .remove = vsw_port_remove,
453 .name = "vsw_port",
454};
455
456static int __init vsw_init(void)
457{
458 return vio_register_driver(&vsw_port_driver);
459}
460
461static void __exit vsw_exit(void)
462{
463 vio_unregister_driver(&vsw_port_driver);
464 vsw_cleanup();
465}
466
467module_init(vsw_init);
468module_exit(vsw_exit);
469
