1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2018 Ericsson AB
7 #include <rte_cycles.h>
8 #include <rte_eventdev_pmd.h>
9 #include <rte_eventdev_pmd_vdev.h>
10 #include <rte_random.h>
12 #include "dsw_evdev.h"
14 #define EVENTDEV_NAME_DSW_PMD event_dsw
17 dsw_port_setup(struct rte_eventdev *dev, uint8_t port_id,
18 const struct rte_event_port_conf *conf)
20 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
21 struct dsw_port *port;
22 struct rte_event_ring *in_ring;
23 char ring_name[RTE_RING_NAMESIZE];
25 port = &dsw->ports[port_id];
27 *port = (struct dsw_port) {
30 .dequeue_depth = conf->dequeue_depth,
31 .enqueue_depth = conf->enqueue_depth,
32 .new_event_threshold = conf->new_event_threshold
35 snprintf(ring_name, sizeof(ring_name), "dsw%d_p%u", dev->data->dev_id,
38 in_ring = rte_event_ring_create(ring_name, DSW_IN_RING_SIZE,
40 RING_F_SC_DEQ|RING_F_EXACT_SZ);
45 port->in_ring = in_ring;
47 rte_atomic16_init(&port->load);
49 port->load_update_interval =
50 (DSW_LOAD_UPDATE_INTERVAL * rte_get_timer_hz()) / US_PER_S;
52 dev->data->ports[port_id] = port;
58 dsw_port_def_conf(struct rte_eventdev *dev __rte_unused,
59 uint8_t port_id __rte_unused,
60 struct rte_event_port_conf *port_conf)
62 *port_conf = (struct rte_event_port_conf) {
63 .new_event_threshold = 1024,
64 .dequeue_depth = DSW_MAX_PORT_DEQUEUE_DEPTH / 4,
65 .enqueue_depth = DSW_MAX_PORT_ENQUEUE_DEPTH / 4
70 dsw_port_release(void *p)
72 struct dsw_port *port = p;
74 rte_event_ring_free(port->in_ring);
78 dsw_queue_setup(struct rte_eventdev *dev, uint8_t queue_id,
79 const struct rte_event_queue_conf *conf)
81 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
82 struct dsw_queue *queue = &dsw->queues[queue_id];
84 if (RTE_EVENT_QUEUE_CFG_ALL_TYPES & conf->event_queue_cfg)
87 if (conf->schedule_type == RTE_SCHED_TYPE_ORDERED)
90 /* SINGLE_LINK is better off treated as TYPE_ATOMIC, since it
91 * avoid the "fake" TYPE_PARALLEL flow_id assignment. Since
92 * the queue will only have a single serving port, no
93 * migration will ever happen, so the extra TYPE_ATOMIC
94 * migration overhead is avoided.
96 if (RTE_EVENT_QUEUE_CFG_SINGLE_LINK & conf->event_queue_cfg)
97 queue->schedule_type = RTE_SCHED_TYPE_ATOMIC;
98 else /* atomic or parallel */
99 queue->schedule_type = conf->schedule_type;
101 queue->num_serving_ports = 0;
107 dsw_queue_def_conf(struct rte_eventdev *dev __rte_unused,
108 uint8_t queue_id __rte_unused,
109 struct rte_event_queue_conf *queue_conf)
111 *queue_conf = (struct rte_event_queue_conf) {
112 .nb_atomic_flows = 4096,
113 .schedule_type = RTE_SCHED_TYPE_ATOMIC,
114 .priority = RTE_EVENT_DEV_PRIORITY_NORMAL
119 dsw_queue_release(struct rte_eventdev *dev __rte_unused,
120 uint8_t queue_id __rte_unused)
125 queue_add_port(struct dsw_queue *queue, uint16_t port_id)
127 queue->serving_ports[queue->num_serving_ports] = port_id;
128 queue->num_serving_ports++;
132 queue_remove_port(struct dsw_queue *queue, uint16_t port_id)
136 for (i = 0; i < queue->num_serving_ports; i++)
137 if (queue->serving_ports[i] == port_id) {
138 uint16_t last_idx = queue->num_serving_ports - 1;
140 queue->serving_ports[i] =
141 queue->serving_ports[last_idx];
142 queue->num_serving_ports--;
149 dsw_port_link_unlink(struct rte_eventdev *dev, void *port,
150 const uint8_t queues[], uint16_t num, bool link)
152 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
153 struct dsw_port *p = port;
157 for (i = 0; i < num; i++) {
158 uint8_t qid = queues[i];
159 struct dsw_queue *q = &dsw->queues[qid];
161 queue_add_port(q, p->id);
164 bool removed = queue_remove_port(q, p->id);
174 dsw_port_link(struct rte_eventdev *dev, void *port, const uint8_t queues[],
175 const uint8_t priorities[] __rte_unused, uint16_t num)
177 return dsw_port_link_unlink(dev, port, queues, num, true);
181 dsw_port_unlink(struct rte_eventdev *dev, void *port, uint8_t queues[],
184 return dsw_port_link_unlink(dev, port, queues, num, false);
188 dsw_info_get(struct rte_eventdev *dev __rte_unused,
189 struct rte_event_dev_info *info)
191 *info = (struct rte_event_dev_info) {
192 .driver_name = DSW_PMD_NAME,
193 .max_event_queues = DSW_MAX_QUEUES,
194 .max_event_queue_flows = DSW_MAX_FLOWS,
195 .max_event_queue_priority_levels = 1,
196 .max_event_priority_levels = 1,
197 .max_event_ports = DSW_MAX_PORTS,
198 .max_event_port_dequeue_depth = DSW_MAX_PORT_DEQUEUE_DEPTH,
199 .max_event_port_enqueue_depth = DSW_MAX_PORT_ENQUEUE_DEPTH,
200 .max_num_events = DSW_MAX_EVENTS,
201 .event_dev_cap = RTE_EVENT_DEV_CAP_BURST_MODE|
202 RTE_EVENT_DEV_CAP_DISTRIBUTED_SCHED
207 dsw_configure(const struct rte_eventdev *dev)
209 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
210 const struct rte_event_dev_config *conf = &dev->data->dev_conf;
211 int32_t min_max_in_flight;
213 dsw->num_ports = conf->nb_event_ports;
214 dsw->num_queues = conf->nb_event_queues;
216 /* Avoid a situation where consumer ports are holding all the
217 * credits, without making use of them.
219 min_max_in_flight = conf->nb_event_ports * DSW_PORT_MAX_CREDITS;
221 dsw->max_inflight = RTE_MAX(conf->nb_events_limit, min_max_in_flight);
228 initial_flow_to_port_assignment(struct dsw_evdev *dsw)
231 for (queue_id = 0; queue_id < dsw->num_queues; queue_id++) {
232 struct dsw_queue *queue = &dsw->queues[queue_id];
234 for (flow_hash = 0; flow_hash < DSW_MAX_FLOWS; flow_hash++) {
236 rte_rand() % queue->num_serving_ports;
238 queue->serving_ports[port_idx];
239 dsw->queues[queue_id].flow_to_port_map[flow_hash] =
246 dsw_start(struct rte_eventdev *dev)
248 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
252 rte_atomic32_init(&dsw->credits_on_loan);
254 initial_flow_to_port_assignment(dsw);
256 now = rte_get_timer_cycles();
257 for (i = 0; i < dsw->num_ports; i++) {
258 dsw->ports[i].measurement_start = now;
259 dsw->ports[i].busy_start = now;
266 dsw_port_drain_buf(uint8_t dev_id, struct rte_event *buf, uint16_t buf_len,
267 eventdev_stop_flush_t flush, void *flush_arg)
271 for (i = 0; i < buf_len; i++)
272 flush(dev_id, buf[i], flush_arg);
276 dsw_port_drain_out(uint8_t dev_id, struct dsw_evdev *dsw, struct dsw_port *port,
277 eventdev_stop_flush_t flush, void *flush_arg)
281 for (dport_id = 0; dport_id < dsw->num_ports; dport_id++)
282 if (dport_id != port->id)
283 dsw_port_drain_buf(dev_id, port->out_buffer[dport_id],
284 port->out_buffer_len[dport_id],
289 dsw_port_drain_in_ring(uint8_t dev_id, struct dsw_port *port,
290 eventdev_stop_flush_t flush, void *flush_arg)
294 while (rte_event_ring_dequeue_burst(port->in_ring, &ev, 1, NULL))
295 flush(dev_id, ev, flush_arg);
299 dsw_drain(uint8_t dev_id, struct dsw_evdev *dsw,
300 eventdev_stop_flush_t flush, void *flush_arg)
307 for (port_id = 0; port_id < dsw->num_ports; port_id++) {
308 struct dsw_port *port = &dsw->ports[port_id];
310 dsw_port_drain_out(dev_id, dsw, port, flush, flush_arg);
311 dsw_port_drain_in_ring(dev_id, port, flush, flush_arg);
316 dsw_stop(struct rte_eventdev *dev)
318 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
320 eventdev_stop_flush_t flush;
323 dev_id = dev->data->dev_id;
324 flush = dev->dev_ops->dev_stop_flush;
325 flush_arg = dev->data->dev_stop_flush_arg;
327 dsw_drain(dev_id, dsw, flush, flush_arg);
331 dsw_close(struct rte_eventdev *dev)
333 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
341 static struct rte_eventdev_ops dsw_evdev_ops = {
342 .port_setup = dsw_port_setup,
343 .port_def_conf = dsw_port_def_conf,
344 .port_release = dsw_port_release,
345 .queue_setup = dsw_queue_setup,
346 .queue_def_conf = dsw_queue_def_conf,
347 .queue_release = dsw_queue_release,
348 .port_link = dsw_port_link,
349 .port_unlink = dsw_port_unlink,
350 .dev_infos_get = dsw_info_get,
351 .dev_configure = dsw_configure,
352 .dev_start = dsw_start,
353 .dev_stop = dsw_stop,
354 .dev_close = dsw_close
358 dsw_probe(struct rte_vdev_device *vdev)
361 struct rte_eventdev *dev;
362 struct dsw_evdev *dsw;
364 name = rte_vdev_device_name(vdev);
366 dev = rte_event_pmd_vdev_init(name, sizeof(struct dsw_evdev),
371 dev->dev_ops = &dsw_evdev_ops;
372 dev->enqueue = dsw_event_enqueue;
373 dev->enqueue_burst = dsw_event_enqueue_burst;
374 dev->enqueue_new_burst = dsw_event_enqueue_new_burst;
375 dev->enqueue_forward_burst = dsw_event_enqueue_forward_burst;
376 dev->dequeue = dsw_event_dequeue;
377 dev->dequeue_burst = dsw_event_dequeue_burst;
379 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
382 dsw = dev->data->dev_private;
383 dsw->data = dev->data;
389 dsw_remove(struct rte_vdev_device *vdev)
393 name = rte_vdev_device_name(vdev);
397 return rte_event_pmd_vdev_uninit(name);
400 static struct rte_vdev_driver evdev_dsw_pmd_drv = {
405 RTE_PMD_REGISTER_VDEV(EVENTDEV_NAME_DSW_PMD, evdev_dsw_pmd_drv);