1
2
3
4
5
6#include <stdbool.h>
7
8#include <rte_alarm.h>
9#include <rte_malloc.h>
10#include <ethdev_driver.h>
11#include <ethdev_vdev.h>
12#include <rte_devargs.h>
13#include <rte_kvargs.h>
14#include <rte_bus_vdev.h>
15
16#include "failsafe_private.h"
17
18const char pmd_failsafe_driver_name[] = FAILSAFE_DRIVER_NAME;
19static const struct rte_eth_link eth_link = {
20 .link_speed = RTE_ETH_SPEED_NUM_10G,
21 .link_duplex = RTE_ETH_LINK_FULL_DUPLEX,
22 .link_status = RTE_ETH_LINK_UP,
23 .link_autoneg = RTE_ETH_LINK_AUTONEG,
24};
25
26static int
27fs_sub_device_alloc(struct rte_eth_dev *dev,
28 const char *params)
29{
30 uint8_t nb_subs;
31 int ret;
32 int i;
33 struct sub_device *sdev;
34 uint8_t sdev_iterator;
35
36 ret = failsafe_args_count_subdevice(dev, params);
37 if (ret)
38 return ret;
39 if (PRIV(dev)->subs_tail > FAILSAFE_MAX_ETHPORTS) {
40 ERROR("Cannot allocate more than %d ports",
41 FAILSAFE_MAX_ETHPORTS);
42 return -ENOSPC;
43 }
44 nb_subs = PRIV(dev)->subs_tail;
45 PRIV(dev)->subs = rte_zmalloc(NULL,
46 sizeof(struct sub_device) * nb_subs,
47 RTE_CACHE_LINE_SIZE);
48 if (PRIV(dev)->subs == NULL) {
49 ERROR("Could not allocate sub_devices");
50 return -ENOMEM;
51 }
52
53 for (i = 1; i < nb_subs; i++)
54 PRIV(dev)->subs[i - 1].next = PRIV(dev)->subs + i;
55 PRIV(dev)->subs[i - 1].next = PRIV(dev)->subs;
56
57 FOREACH_SUBDEV(sdev, sdev_iterator, dev) {
58 sdev->sdev_port_id = RTE_MAX_ETHPORTS;
59 }
60 return 0;
61}
62
63static void fs_hotplug_alarm(void *arg);
64
65int
66failsafe_hotplug_alarm_install(struct rte_eth_dev *dev)
67{
68 int ret;
69
70 if (dev == NULL)
71 return -EINVAL;
72 if (PRIV(dev)->pending_alarm)
73 return 0;
74 ret = rte_eal_alarm_set(failsafe_hotplug_poll * 1000,
75 fs_hotplug_alarm,
76 dev);
77 if (ret) {
78 ERROR("Could not set up plug-in event detection");
79 return ret;
80 }
81 PRIV(dev)->pending_alarm = 1;
82 return 0;
83}
84
85int
86failsafe_hotplug_alarm_cancel(struct rte_eth_dev *dev)
87{
88 int ret = 0;
89
90 rte_errno = 0;
91 rte_eal_alarm_cancel(fs_hotplug_alarm, dev);
92 if (rte_errno) {
93 ERROR("rte_eal_alarm_cancel failed (errno: %s)",
94 strerror(rte_errno));
95 ret = -rte_errno;
96 } else {
97 PRIV(dev)->pending_alarm = 0;
98 }
99 return ret;
100}
101
102static void
103fs_hotplug_alarm(void *arg)
104{
105 struct rte_eth_dev *dev = arg;
106 struct sub_device *sdev;
107 int ret;
108 uint8_t i;
109
110 if (!PRIV(dev)->pending_alarm)
111 return;
112 PRIV(dev)->pending_alarm = 0;
113 FOREACH_SUBDEV(sdev, i, dev)
114 if (sdev->state != PRIV(dev)->state)
115 break;
116
117 if (i != PRIV(dev)->subs_tail) {
118 if (fs_lock(dev, 1) != 0)
119 goto reinstall;
120 ret = failsafe_eth_dev_state_sync(dev);
121 fs_unlock(dev, 1);
122 if (ret)
123 ERROR("Unable to synchronize sub_device state");
124 }
125 failsafe_dev_remove(dev);
126reinstall:
127 ret = failsafe_hotplug_alarm_install(dev);
128 if (ret)
129 ERROR("Unable to set up next alarm");
130}
131
132static int
133fs_mutex_init(struct fs_priv *priv)
134{
135 int ret;
136 pthread_mutexattr_t attr;
137
138 ret = pthread_mutexattr_init(&attr);
139 if (ret) {
140 ERROR("Cannot initiate mutex attributes - %s", strerror(ret));
141 return ret;
142 }
143
144 ret = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
145 if (ret) {
146 ERROR("Cannot set mutex type - %s", strerror(ret));
147 return ret;
148 }
149 ret = pthread_mutex_init(&priv->hotplug_mutex, &attr);
150 if (ret) {
151 ERROR("Cannot initiate mutex - %s", strerror(ret));
152 return ret;
153 }
154 return 0;
155}
156
157static int
158fs_eth_dev_create(struct rte_vdev_device *vdev)
159{
160 struct rte_eth_dev *dev;
161 struct rte_ether_addr *mac;
162 struct fs_priv *priv;
163 struct sub_device *sdev;
164 const char *params;
165 unsigned int socket_id;
166 uint8_t i;
167 int ret;
168
169 dev = NULL;
170 priv = NULL;
171 socket_id = rte_socket_id();
172 INFO("Creating fail-safe device on NUMA socket %u", socket_id);
173 params = rte_vdev_device_args(vdev);
174 if (params == NULL) {
175 ERROR("This PMD requires sub-devices, none provided");
176 return -1;
177 }
178 dev = rte_eth_vdev_allocate(vdev, sizeof(*priv));
179 if (dev == NULL) {
180 ERROR("Unable to allocate rte_eth_dev");
181 return -1;
182 }
183 priv = PRIV(dev);
184 priv->data = dev->data;
185 priv->rxp = FS_RX_PROXY_INIT;
186 dev->dev_ops = &failsafe_ops;
187 dev->data->mac_addrs = &PRIV(dev)->mac_addrs[0];
188 dev->data->dev_link = eth_link;
189 PRIV(dev)->nb_mac_addr = 1;
190 TAILQ_INIT(&PRIV(dev)->flow_list);
191 dev->rx_pkt_burst = (eth_rx_burst_t)&failsafe_rx_burst;
192 dev->tx_pkt_burst = (eth_tx_burst_t)&failsafe_tx_burst;
193 ret = fs_sub_device_alloc(dev, params);
194 if (ret) {
195 ERROR("Could not allocate sub_devices");
196 goto free_dev;
197 }
198 ret = failsafe_args_parse(dev, params);
199 if (ret)
200 goto free_subs;
201 ret = rte_eth_dev_owner_new(&priv->my_owner.id);
202 if (ret) {
203 ERROR("Failed to get unique owner identifier");
204 goto free_args;
205 }
206 snprintf(priv->my_owner.name, sizeof(priv->my_owner.name),
207 FAILSAFE_OWNER_NAME);
208 DEBUG("Failsafe port %u owner info: %s_%016"PRIX64, dev->data->port_id,
209 priv->my_owner.name, priv->my_owner.id);
210 ret = rte_eth_dev_callback_register(RTE_ETH_ALL, RTE_ETH_EVENT_NEW,
211 failsafe_eth_new_event_callback,
212 dev);
213 if (ret) {
214 ERROR("Failed to register NEW callback");
215 goto free_args;
216 }
217 ret = failsafe_eal_init(dev);
218 if (ret)
219 goto unregister_new_callback;
220 ret = fs_mutex_init(priv);
221 if (ret)
222 goto unregister_new_callback;
223 ret = failsafe_hotplug_alarm_install(dev);
224 if (ret) {
225 ERROR("Could not set up plug-in event detection");
226 goto unregister_new_callback;
227 }
228 mac = &dev->data->mac_addrs[0];
229 if (failsafe_mac_from_arg) {
230
231
232
233
234 FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_PROBED) {
235 ret = rte_eth_dev_default_mac_addr_set(PORT_ID(sdev),
236 mac);
237 if (ret) {
238 ERROR("Failed to set default MAC address");
239 goto cancel_alarm;
240 }
241 }
242 } else {
243
244
245
246
247 FOREACH_SUBDEV(sdev, i, dev)
248 if (sdev->state >= DEV_PROBED) {
249 rte_ether_addr_copy(
250 Ð(sdev)->data->mac_addrs[0], mac);
251 break;
252 }
253
254
255
256
257
258
259
260 if (i == priv->subs_tail)
261 rte_eth_random_addr(&mac->addr_bytes[0]);
262 }
263 INFO("MAC address is " RTE_ETHER_ADDR_PRT_FMT,
264 RTE_ETHER_ADDR_BYTES(mac));
265 dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC |
266 RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
267
268
269 PRIV(dev)->intr_handle =
270 rte_intr_instance_alloc(RTE_INTR_INSTANCE_F_SHARED);
271 if (PRIV(dev)->intr_handle == NULL) {
272 ERROR("Failed to allocate intr handle");
273 goto cancel_alarm;
274 }
275
276 if (rte_intr_fd_set(PRIV(dev)->intr_handle, -1))
277 goto cancel_alarm;
278
279 if (rte_intr_type_set(PRIV(dev)->intr_handle, RTE_INTR_HANDLE_EXT))
280 goto cancel_alarm;
281
282 rte_eth_dev_probing_finish(dev);
283
284 return 0;
285cancel_alarm:
286 failsafe_hotplug_alarm_cancel(dev);
287unregister_new_callback:
288 rte_eth_dev_callback_unregister(RTE_ETH_ALL, RTE_ETH_EVENT_NEW,
289 failsafe_eth_new_event_callback, dev);
290free_args:
291 failsafe_args_free(dev);
292free_subs:
293 rte_free(PRIV(dev)->subs);
294free_dev:
295
296 dev->data->mac_addrs = NULL;
297 rte_eth_dev_release_port(dev);
298 return -1;
299}
300
301static int
302fs_rte_eth_free(const char *name)
303{
304 struct rte_eth_dev *dev;
305 int ret;
306
307 dev = rte_eth_dev_allocated(name);
308 if (dev == NULL)
309 return 0;
310 ret = failsafe_eth_dev_close(dev);
311 rte_eth_dev_release_port(dev);
312 rte_intr_instance_free(PRIV(dev)->intr_handle);
313 return ret;
314}
315
316static bool
317devargs_already_listed(struct rte_devargs *devargs)
318{
319 struct rte_devargs *list_da;
320
321 RTE_EAL_DEVARGS_FOREACH(devargs->bus->name, list_da) {
322 if (strcmp(list_da->name, devargs->name) == 0)
323
324 return true;
325 }
326 return false;
327}
328
329static int
330rte_pmd_failsafe_probe(struct rte_vdev_device *vdev)
331{
332 const char *name;
333 struct rte_eth_dev *eth_dev;
334 struct sub_device *sdev;
335 struct rte_devargs devargs;
336 uint8_t i;
337 int ret;
338
339 name = rte_vdev_device_name(vdev);
340 INFO("Initializing " FAILSAFE_DRIVER_NAME " for %s",
341 name);
342
343 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
344 eth_dev = rte_eth_dev_attach_secondary(name);
345 if (!eth_dev) {
346 ERROR("Failed to probe %s", name);
347 return -1;
348 }
349 eth_dev->dev_ops = &failsafe_ops;
350 eth_dev->device = &vdev->device;
351 eth_dev->rx_pkt_burst = (eth_rx_burst_t)&failsafe_rx_burst;
352 eth_dev->tx_pkt_burst = (eth_tx_burst_t)&failsafe_tx_burst;
353
354
355
356
357
358 FOREACH_SUBDEV(sdev, i, eth_dev) {
359
360 if (sdev->devargs.name[0] == '\0')
361 continue;
362
363
364 ret = rte_devargs_parse(&devargs,
365 sdev->devargs.name);
366 if (ret != 0) {
367 ERROR("Failed to parse devargs %s",
368 devargs.name);
369 continue;
370 }
371 if (!devargs_already_listed(&devargs)) {
372 ret = rte_dev_probe(devargs.name);
373 if (ret < 0) {
374 ERROR("Failed to probe devargs %s",
375 devargs.name);
376 continue;
377 }
378 }
379 }
380 rte_eth_dev_probing_finish(eth_dev);
381 return 0;
382 }
383
384 return fs_eth_dev_create(vdev);
385}
386
387static int
388rte_pmd_failsafe_remove(struct rte_vdev_device *vdev)
389{
390 const char *name;
391
392 name = rte_vdev_device_name(vdev);
393 INFO("Uninitializing " FAILSAFE_DRIVER_NAME " for %s", name);
394 return fs_rte_eth_free(name);
395}
396
397static struct rte_vdev_driver failsafe_drv = {
398 .probe = rte_pmd_failsafe_probe,
399 .remove = rte_pmd_failsafe_remove,
400};
401
402RTE_PMD_REGISTER_VDEV(net_failsafe, failsafe_drv);
403RTE_PMD_REGISTER_PARAM_STRING(net_failsafe, PMD_FAILSAFE_PARAM_STRING);
404RTE_LOG_REGISTER_DEFAULT(failsafe_logtype, NOTICE)
405
