4 * Copyright 2017 6WIND S.A.
5 * Copyright 2017 Mellanox.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * * Neither the name of 6WIND S.A. nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 #ifndef _RTE_ETH_FAILSAFE_PRIVATE_H_
35 #define _RTE_ETH_FAILSAFE_PRIVATE_H_
37 #include <sys/queue.h>
39 #include <rte_atomic.h>
41 #include <rte_ethdev.h>
42 #include <rte_devargs.h>
44 #define FAILSAFE_DRIVER_NAME "Fail-safe PMD"
46 #define PMD_FAILSAFE_MAC_KVARG "mac"
47 #define PMD_FAILSAFE_HOTPLUG_POLL_KVARG "hotplug_poll"
48 #define PMD_FAILSAFE_PARAM_STRING \
50 "exec(<shell command>)," \
55 #define FAILSAFE_HOTPLUG_DEFAULT_TIMEOUT_MS 2000
57 #define FAILSAFE_MAX_ETHPORTS 2
58 #define FAILSAFE_MAX_ETHADDR 128
65 /* id of last sub_device polled */
67 unsigned int socket_id;
68 struct rte_eth_rxq_info info;
69 rte_atomic64_t refcnt[];
75 unsigned int socket_id;
76 struct rte_eth_txq_info info;
77 rte_atomic64_t refcnt[];
81 TAILQ_ENTRY(rte_flow) next;
83 struct rte_flow *flows[FAILSAFE_MAX_ETHPORTS];
84 /* flow description for synchronization */
85 struct rte_flow_desc *fd;
97 struct rte_eth_stats stats;
102 /* Exhaustive DPDK device description */
103 struct rte_devargs devargs;
105 struct rte_device *dev;
106 struct rte_eth_dev *edev;
108 /* Device state machine */
109 enum dev_state state;
110 /* Last stats snapshot passed to user */
111 struct fs_stats stats_snapshot;
112 /* Some device are defined as a command line */
114 /* fail-safe device backreference */
115 struct rte_eth_dev *fs_dev;
116 /* flag calling for recollection */
117 volatile unsigned int remove:1;
118 /* flow isolation state */
120 /* RMV callback registration state */
121 unsigned int rmv_callback:1;
122 /* LSC callback registration state */
123 unsigned int lsc_callback:1;
127 struct rte_eth_dev *dev;
129 * Set of sub_devices.
130 * subs[0] is the preferred device
131 * any other is just another slave
133 struct sub_device *subs;
134 uint8_t subs_head; /* if head == tail, no subs */
135 uint8_t subs_tail; /* first invalid */
136 uint8_t subs_tx; /* current emitting device */
137 uint8_t current_probed;
139 TAILQ_HEAD(sub_flows, rte_flow) flow_list;
140 /* current number of mac_addr slots allocated. */
141 uint32_t nb_mac_addr;
142 struct ether_addr mac_addrs[FAILSAFE_MAX_ETHADDR];
143 uint32_t mac_addr_pool[FAILSAFE_MAX_ETHADDR];
144 /* current capabilities */
145 struct rte_eth_dev_info infos;
147 * Fail-safe state machine.
148 * This level will be tracking state of the EAL and eth
149 * layer at large as defined by the user application.
150 * It will then steer the sub_devices toward the same
151 * synchronized state.
153 enum dev_state state;
154 struct rte_eth_stats stats_accumulator;
155 unsigned int pending_alarm:1; /* An alarm is pending */
156 /* flow isolation state */
162 int failsafe_hotplug_alarm_install(struct rte_eth_dev *dev);
163 int failsafe_hotplug_alarm_cancel(struct rte_eth_dev *dev);
167 void set_burst_fn(struct rte_eth_dev *dev, int force_safe);
169 uint16_t failsafe_rx_burst(void *rxq,
170 struct rte_mbuf **rx_pkts, uint16_t nb_pkts);
171 uint16_t failsafe_tx_burst(void *txq,
172 struct rte_mbuf **tx_pkts, uint16_t nb_pkts);
174 uint16_t failsafe_rx_burst_fast(void *rxq,
175 struct rte_mbuf **rx_pkts, uint16_t nb_pkts);
176 uint16_t failsafe_tx_burst_fast(void *txq,
177 struct rte_mbuf **tx_pkts, uint16_t nb_pkts);
181 int failsafe_args_parse(struct rte_eth_dev *dev, const char *params);
182 void failsafe_args_free(struct rte_eth_dev *dev);
183 int failsafe_args_count_subdevice(struct rte_eth_dev *dev, const char *params);
184 int failsafe_args_parse_subs(struct rte_eth_dev *dev);
188 int failsafe_eal_init(struct rte_eth_dev *dev);
189 int failsafe_eal_uninit(struct rte_eth_dev *dev);
193 int failsafe_eth_dev_state_sync(struct rte_eth_dev *dev);
194 void failsafe_eth_dev_unregister_callbacks(struct sub_device *sdev);
195 void failsafe_dev_remove(struct rte_eth_dev *dev);
196 void failsafe_stats_increment(struct rte_eth_stats *to,
197 struct rte_eth_stats *from);
198 int failsafe_eth_rmv_event_callback(uint16_t port_id,
199 enum rte_eth_event_type type,
200 void *arg, void *out);
201 int failsafe_eth_lsc_event_callback(uint16_t port_id,
202 enum rte_eth_event_type event,
203 void *cb_arg, void *out);
207 extern const char pmd_failsafe_driver_name[];
208 extern const struct eth_dev_ops failsafe_ops;
209 extern const struct rte_flow_ops fs_flow_ops;
210 extern uint64_t hotplug_poll;
211 extern int mac_from_arg;
215 /* dev: (struct rte_eth_dev *) fail-safe device */
217 ((struct fs_priv *)(dev)->data->dev_private)
219 /* sdev: (struct sub_device *) */
223 /* sdev: (struct sub_device *) */
224 #define PORT_ID(sdev) \
225 (ETH(sdev)->data->port_id)
227 /* sdev: (struct sub_device *) */
228 #define SUB_ID(sdev) \
232 * Stateful iterator construct over fail-safe sub-devices:
233 * s: (struct sub_device *), iterator
234 * i: (uint8_t), increment
235 * dev: (struct rte_eth_dev *), fail-safe ethdev
236 * state: (enum dev_state), minimum acceptable device state
238 #define FOREACH_SUBDEV_STATE(s, i, dev, state) \
239 for (s = fs_find_next((dev), 0, state, &i); \
241 s = fs_find_next((dev), i + 1, state, &i))
244 * Iterator construct over fail-safe sub-devices:
245 * s: (struct sub_device *), iterator
246 * i: (uint8_t), increment
247 * dev: (struct rte_eth_dev *), fail-safe ethdev
249 #define FOREACH_SUBDEV(s, i, dev) \
250 FOREACH_SUBDEV_STATE(s, i, dev, DEV_UNDEFINED)
252 /* dev: (struct rte_eth_dev *) fail-safe device */
253 #define PREFERRED_SUBDEV(dev) \
254 (&PRIV(dev)->subs[0])
256 /* dev: (struct rte_eth_dev *) fail-safe device */
257 #define TX_SUBDEV(dev) \
258 (PRIV(dev)->subs_tx >= PRIV(dev)->subs_tail ? NULL \
259 : (PRIV(dev)->subs[PRIV(dev)->subs_tx].state < DEV_PROBED ? NULL \
260 : &PRIV(dev)->subs[PRIV(dev)->subs_tx]))
263 * s: (struct sub_device *)
264 * ops: (struct eth_dev_ops) member
266 #define SUBOPS(s, ops) \
267 (ETH(s)->dev_ops->ops)
274 * a: (rte_atomic64_t)
276 #define FS_ATOMIC_P(a) \
277 rte_atomic64_add(&(a), 1)
280 * a: (rte_atomic64_t)
282 #define FS_ATOMIC_V(a) \
283 rte_atomic64_sub(&(a), 1)
286 * s: (struct sub_device *)
289 #define FS_ATOMIC_RX(s, i) \
291 &((struct rxq *)((s)->fs_dev->data->rx_queues[i]))->refcnt[(s)->sid] \
294 * s: (struct sub_device *)
297 #define FS_ATOMIC_TX(s, i) \
299 &((struct txq *)((s)->fs_dev->data->tx_queues[i]))->refcnt[(s)->sid] \
302 #define LOG__(level, m, ...) \
303 RTE_LOG(level, PMD, "net_failsafe: " m "%c", __VA_ARGS__)
304 #define LOG_(level, ...) LOG__(level, __VA_ARGS__, '\n')
305 #define DEBUG(...) LOG_(DEBUG, __VA_ARGS__)
306 #define INFO(...) LOG_(INFO, __VA_ARGS__)
307 #define WARN(...) LOG_(WARNING, __VA_ARGS__)
308 #define ERROR(...) LOG_(ERR, __VA_ARGS__)
310 /* inlined functions */
312 static inline struct sub_device *
313 fs_find_next(struct rte_eth_dev *dev,
315 enum dev_state min_state,
318 struct sub_device *subs;
321 subs = PRIV(dev)->subs;
322 tail = PRIV(dev)->subs_tail;
324 if (subs[sid].state >= min_state)
335 * Switch emitting device.
336 * If banned is set, banned must not be considered for
337 * the role of emitting device.
340 fs_switch_dev(struct rte_eth_dev *dev,
341 struct sub_device *banned)
343 struct sub_device *txd;
344 enum dev_state req_state;
346 req_state = PRIV(dev)->state;
347 txd = TX_SUBDEV(dev);
348 if (PREFERRED_SUBDEV(dev)->state >= req_state &&
349 PREFERRED_SUBDEV(dev) != banned) {
350 if (txd != PREFERRED_SUBDEV(dev) &&
352 (req_state == DEV_STARTED) ||
353 (txd && txd->state < DEV_STARTED))) {
354 DEBUG("Switching tx_dev to preferred sub_device");
355 PRIV(dev)->subs_tx = 0;
357 } else if ((txd && txd->state < req_state) ||
360 struct sub_device *sdev = NULL;
363 /* Using acceptable device */
364 FOREACH_SUBDEV_STATE(sdev, i, dev, req_state) {
367 DEBUG("Switching tx_dev to sub_device %d",
369 PRIV(dev)->subs_tx = i;
372 if (i >= PRIV(dev)->subs_tail || sdev == NULL) {
373 DEBUG("No device ready, deactivating tx_dev");
374 PRIV(dev)->subs_tx = PRIV(dev)->subs_tail;
379 set_burst_fn(dev, 0);
383 #endif /* _RTE_ETH_FAILSAFE_PRIVATE_H_ */