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 struct rte_ring *ctl_in_ring;
24 char ring_name[RTE_RING_NAMESIZE];
26 port = &dsw->ports[port_id];
28 *port = (struct dsw_port) {
31 .dequeue_depth = conf->dequeue_depth,
32 .enqueue_depth = conf->enqueue_depth,
33 .new_event_threshold = conf->new_event_threshold
36 snprintf(ring_name, sizeof(ring_name), "dsw%d_p%u", dev->data->dev_id,
39 in_ring = rte_event_ring_create(ring_name, DSW_IN_RING_SIZE,
41 RING_F_SC_DEQ|RING_F_EXACT_SZ);
46 snprintf(ring_name, sizeof(ring_name), "dswctl%d_p%u",
47 dev->data->dev_id, port_id);
49 ctl_in_ring = rte_ring_create(ring_name, DSW_CTL_IN_RING_SIZE,
51 RING_F_SC_DEQ|RING_F_EXACT_SZ);
53 if (ctl_in_ring == NULL) {
54 rte_event_ring_free(in_ring);
58 port->in_ring = in_ring;
59 port->ctl_in_ring = ctl_in_ring;
61 rte_atomic16_init(&port->load);
63 port->load_update_interval =
64 (DSW_LOAD_UPDATE_INTERVAL * rte_get_timer_hz()) / US_PER_S;
66 port->migration_interval =
67 (DSW_MIGRATION_INTERVAL * rte_get_timer_hz()) / US_PER_S;
69 dev->data->ports[port_id] = port;
75 dsw_port_def_conf(struct rte_eventdev *dev __rte_unused,
76 uint8_t port_id __rte_unused,
77 struct rte_event_port_conf *port_conf)
79 *port_conf = (struct rte_event_port_conf) {
80 .new_event_threshold = 1024,
81 .dequeue_depth = DSW_MAX_PORT_DEQUEUE_DEPTH / 4,
82 .enqueue_depth = DSW_MAX_PORT_ENQUEUE_DEPTH / 4
87 dsw_port_release(void *p)
89 struct dsw_port *port = p;
91 rte_event_ring_free(port->in_ring);
92 rte_ring_free(port->ctl_in_ring);
96 dsw_queue_setup(struct rte_eventdev *dev, uint8_t queue_id,
97 const struct rte_event_queue_conf *conf)
99 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
100 struct dsw_queue *queue = &dsw->queues[queue_id];
102 if (RTE_EVENT_QUEUE_CFG_ALL_TYPES & conf->event_queue_cfg)
105 if (conf->schedule_type == RTE_SCHED_TYPE_ORDERED)
108 /* SINGLE_LINK is better off treated as TYPE_ATOMIC, since it
109 * avoid the "fake" TYPE_PARALLEL flow_id assignment. Since
110 * the queue will only have a single serving port, no
111 * migration will ever happen, so the extra TYPE_ATOMIC
112 * migration overhead is avoided.
114 if (RTE_EVENT_QUEUE_CFG_SINGLE_LINK & conf->event_queue_cfg)
115 queue->schedule_type = RTE_SCHED_TYPE_ATOMIC;
116 else /* atomic or parallel */
117 queue->schedule_type = conf->schedule_type;
119 queue->num_serving_ports = 0;
125 dsw_queue_def_conf(struct rte_eventdev *dev __rte_unused,
126 uint8_t queue_id __rte_unused,
127 struct rte_event_queue_conf *queue_conf)
129 *queue_conf = (struct rte_event_queue_conf) {
130 .nb_atomic_flows = 4096,
131 .schedule_type = RTE_SCHED_TYPE_ATOMIC,
132 .priority = RTE_EVENT_DEV_PRIORITY_NORMAL
137 dsw_queue_release(struct rte_eventdev *dev __rte_unused,
138 uint8_t queue_id __rte_unused)
143 queue_add_port(struct dsw_queue *queue, uint16_t port_id)
145 queue->serving_ports[queue->num_serving_ports] = port_id;
146 queue->num_serving_ports++;
150 queue_remove_port(struct dsw_queue *queue, uint16_t port_id)
154 for (i = 0; i < queue->num_serving_ports; i++)
155 if (queue->serving_ports[i] == port_id) {
156 uint16_t last_idx = queue->num_serving_ports - 1;
158 queue->serving_ports[i] =
159 queue->serving_ports[last_idx];
160 queue->num_serving_ports--;
167 dsw_port_link_unlink(struct rte_eventdev *dev, void *port,
168 const uint8_t queues[], uint16_t num, bool link)
170 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
171 struct dsw_port *p = port;
175 for (i = 0; i < num; i++) {
176 uint8_t qid = queues[i];
177 struct dsw_queue *q = &dsw->queues[qid];
179 queue_add_port(q, p->id);
182 bool removed = queue_remove_port(q, p->id);
192 dsw_port_link(struct rte_eventdev *dev, void *port, const uint8_t queues[],
193 const uint8_t priorities[] __rte_unused, uint16_t num)
195 return dsw_port_link_unlink(dev, port, queues, num, true);
199 dsw_port_unlink(struct rte_eventdev *dev, void *port, uint8_t queues[],
202 return dsw_port_link_unlink(dev, port, queues, num, false);
206 dsw_info_get(struct rte_eventdev *dev __rte_unused,
207 struct rte_event_dev_info *info)
209 *info = (struct rte_event_dev_info) {
210 .driver_name = DSW_PMD_NAME,
211 .max_event_queues = DSW_MAX_QUEUES,
212 .max_event_queue_flows = DSW_MAX_FLOWS,
213 .max_event_queue_priority_levels = 1,
214 .max_event_priority_levels = 1,
215 .max_event_ports = DSW_MAX_PORTS,
216 .max_event_port_dequeue_depth = DSW_MAX_PORT_DEQUEUE_DEPTH,
217 .max_event_port_enqueue_depth = DSW_MAX_PORT_ENQUEUE_DEPTH,
218 .max_num_events = DSW_MAX_EVENTS,
219 .event_dev_cap = RTE_EVENT_DEV_CAP_BURST_MODE|
220 RTE_EVENT_DEV_CAP_DISTRIBUTED_SCHED
225 dsw_configure(const struct rte_eventdev *dev)
227 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
228 const struct rte_event_dev_config *conf = &dev->data->dev_conf;
229 int32_t min_max_in_flight;
231 dsw->num_ports = conf->nb_event_ports;
232 dsw->num_queues = conf->nb_event_queues;
234 /* Avoid a situation where consumer ports are holding all the
235 * credits, without making use of them.
237 min_max_in_flight = conf->nb_event_ports * DSW_PORT_MAX_CREDITS;
239 dsw->max_inflight = RTE_MAX(conf->nb_events_limit, min_max_in_flight);
246 initial_flow_to_port_assignment(struct dsw_evdev *dsw)
249 for (queue_id = 0; queue_id < dsw->num_queues; queue_id++) {
250 struct dsw_queue *queue = &dsw->queues[queue_id];
252 for (flow_hash = 0; flow_hash < DSW_MAX_FLOWS; flow_hash++) {
254 rte_rand() % queue->num_serving_ports;
256 queue->serving_ports[port_idx];
257 dsw->queues[queue_id].flow_to_port_map[flow_hash] =
264 dsw_start(struct rte_eventdev *dev)
266 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
270 rte_atomic32_init(&dsw->credits_on_loan);
272 initial_flow_to_port_assignment(dsw);
274 now = rte_get_timer_cycles();
275 for (i = 0; i < dsw->num_ports; i++) {
276 dsw->ports[i].measurement_start = now;
277 dsw->ports[i].busy_start = now;
284 dsw_port_drain_buf(uint8_t dev_id, struct rte_event *buf, uint16_t buf_len,
285 eventdev_stop_flush_t flush, void *flush_arg)
289 for (i = 0; i < buf_len; i++)
290 flush(dev_id, buf[i], flush_arg);
294 dsw_port_drain_paused(uint8_t dev_id, struct dsw_port *port,
295 eventdev_stop_flush_t flush, void *flush_arg)
297 dsw_port_drain_buf(dev_id, port->paused_events, port->paused_events_len,
302 dsw_port_drain_out(uint8_t dev_id, struct dsw_evdev *dsw, struct dsw_port *port,
303 eventdev_stop_flush_t flush, void *flush_arg)
307 for (dport_id = 0; dport_id < dsw->num_ports; dport_id++)
308 if (dport_id != port->id)
309 dsw_port_drain_buf(dev_id, port->out_buffer[dport_id],
310 port->out_buffer_len[dport_id],
315 dsw_port_drain_in_ring(uint8_t dev_id, struct dsw_port *port,
316 eventdev_stop_flush_t flush, void *flush_arg)
320 while (rte_event_ring_dequeue_burst(port->in_ring, &ev, 1, NULL))
321 flush(dev_id, ev, flush_arg);
325 dsw_drain(uint8_t dev_id, struct dsw_evdev *dsw,
326 eventdev_stop_flush_t flush, void *flush_arg)
333 for (port_id = 0; port_id < dsw->num_ports; port_id++) {
334 struct dsw_port *port = &dsw->ports[port_id];
336 dsw_port_drain_out(dev_id, dsw, port, flush, flush_arg);
337 dsw_port_drain_paused(dev_id, port, flush, flush_arg);
338 dsw_port_drain_in_ring(dev_id, port, flush, flush_arg);
343 dsw_stop(struct rte_eventdev *dev)
345 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
347 eventdev_stop_flush_t flush;
350 dev_id = dev->data->dev_id;
351 flush = dev->dev_ops->dev_stop_flush;
352 flush_arg = dev->data->dev_stop_flush_arg;
354 dsw_drain(dev_id, dsw, flush, flush_arg);
358 dsw_close(struct rte_eventdev *dev)
360 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
368 static struct rte_eventdev_ops dsw_evdev_ops = {
369 .port_setup = dsw_port_setup,
370 .port_def_conf = dsw_port_def_conf,
371 .port_release = dsw_port_release,
372 .queue_setup = dsw_queue_setup,
373 .queue_def_conf = dsw_queue_def_conf,
374 .queue_release = dsw_queue_release,
375 .port_link = dsw_port_link,
376 .port_unlink = dsw_port_unlink,
377 .dev_infos_get = dsw_info_get,
378 .dev_configure = dsw_configure,
379 .dev_start = dsw_start,
380 .dev_stop = dsw_stop,
381 .dev_close = dsw_close,
382 .xstats_get = dsw_xstats_get,
383 .xstats_get_names = dsw_xstats_get_names,
384 .xstats_get_by_name = dsw_xstats_get_by_name
388 dsw_probe(struct rte_vdev_device *vdev)
391 struct rte_eventdev *dev;
392 struct dsw_evdev *dsw;
394 name = rte_vdev_device_name(vdev);
396 dev = rte_event_pmd_vdev_init(name, sizeof(struct dsw_evdev),
401 dev->dev_ops = &dsw_evdev_ops;
402 dev->enqueue = dsw_event_enqueue;
403 dev->enqueue_burst = dsw_event_enqueue_burst;
404 dev->enqueue_new_burst = dsw_event_enqueue_new_burst;
405 dev->enqueue_forward_burst = dsw_event_enqueue_forward_burst;
406 dev->dequeue = dsw_event_dequeue;
407 dev->dequeue_burst = dsw_event_dequeue_burst;
409 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
412 dsw = dev->data->dev_private;
413 dsw->data = dev->data;
419 dsw_remove(struct rte_vdev_device *vdev)
423 name = rte_vdev_device_name(vdev);
427 return rte_event_pmd_vdev_uninit(name);
430 static struct rte_vdev_driver evdev_dsw_pmd_drv = {
435 RTE_PMD_REGISTER_VDEV(EVENTDEV_NAME_DSW_PMD, evdev_dsw_pmd_drv);