1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2018 Ericsson AB
7 #include <rte_eventdev_pmd.h>
8 #include <rte_eventdev_pmd_vdev.h>
9 #include <rte_random.h>
11 #include "dsw_evdev.h"
13 #define EVENTDEV_NAME_DSW_PMD event_dsw
16 dsw_port_setup(struct rte_eventdev *dev, uint8_t port_id,
17 const struct rte_event_port_conf *conf)
19 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
20 struct dsw_port *port;
21 struct rte_event_ring *in_ring;
22 char ring_name[RTE_RING_NAMESIZE];
24 port = &dsw->ports[port_id];
26 *port = (struct dsw_port) {
29 .dequeue_depth = conf->dequeue_depth,
30 .enqueue_depth = conf->enqueue_depth,
31 .new_event_threshold = conf->new_event_threshold
34 snprintf(ring_name, sizeof(ring_name), "dsw%d_p%u", dev->data->dev_id,
37 in_ring = rte_event_ring_create(ring_name, DSW_IN_RING_SIZE,
39 RING_F_SC_DEQ|RING_F_EXACT_SZ);
44 port->in_ring = in_ring;
46 dev->data->ports[port_id] = port;
52 dsw_port_def_conf(struct rte_eventdev *dev __rte_unused,
53 uint8_t port_id __rte_unused,
54 struct rte_event_port_conf *port_conf)
56 *port_conf = (struct rte_event_port_conf) {
57 .new_event_threshold = 1024,
58 .dequeue_depth = DSW_MAX_PORT_DEQUEUE_DEPTH / 4,
59 .enqueue_depth = DSW_MAX_PORT_ENQUEUE_DEPTH / 4
64 dsw_port_release(void *p)
66 struct dsw_port *port = p;
68 rte_event_ring_free(port->in_ring);
72 dsw_queue_setup(struct rte_eventdev *dev, uint8_t queue_id,
73 const struct rte_event_queue_conf *conf)
75 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
76 struct dsw_queue *queue = &dsw->queues[queue_id];
78 if (RTE_EVENT_QUEUE_CFG_ALL_TYPES & conf->event_queue_cfg)
81 if (conf->schedule_type == RTE_SCHED_TYPE_ORDERED)
84 /* SINGLE_LINK is better off treated as TYPE_ATOMIC, since it
85 * avoid the "fake" TYPE_PARALLEL flow_id assignment. Since
86 * the queue will only have a single serving port, no
87 * migration will ever happen, so the extra TYPE_ATOMIC
88 * migration overhead is avoided.
90 if (RTE_EVENT_QUEUE_CFG_SINGLE_LINK & conf->event_queue_cfg)
91 queue->schedule_type = RTE_SCHED_TYPE_ATOMIC;
92 else /* atomic or parallel */
93 queue->schedule_type = conf->schedule_type;
95 queue->num_serving_ports = 0;
101 dsw_queue_def_conf(struct rte_eventdev *dev __rte_unused,
102 uint8_t queue_id __rte_unused,
103 struct rte_event_queue_conf *queue_conf)
105 *queue_conf = (struct rte_event_queue_conf) {
106 .nb_atomic_flows = 4096,
107 .schedule_type = RTE_SCHED_TYPE_ATOMIC,
108 .priority = RTE_EVENT_DEV_PRIORITY_NORMAL
113 dsw_queue_release(struct rte_eventdev *dev __rte_unused,
114 uint8_t queue_id __rte_unused)
119 queue_add_port(struct dsw_queue *queue, uint16_t port_id)
121 queue->serving_ports[queue->num_serving_ports] = port_id;
122 queue->num_serving_ports++;
126 queue_remove_port(struct dsw_queue *queue, uint16_t port_id)
130 for (i = 0; i < queue->num_serving_ports; i++)
131 if (queue->serving_ports[i] == port_id) {
132 uint16_t last_idx = queue->num_serving_ports - 1;
134 queue->serving_ports[i] =
135 queue->serving_ports[last_idx];
136 queue->num_serving_ports--;
143 dsw_port_link_unlink(struct rte_eventdev *dev, void *port,
144 const uint8_t queues[], uint16_t num, bool link)
146 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
147 struct dsw_port *p = port;
151 for (i = 0; i < num; i++) {
152 uint8_t qid = queues[i];
153 struct dsw_queue *q = &dsw->queues[qid];
155 queue_add_port(q, p->id);
158 bool removed = queue_remove_port(q, p->id);
168 dsw_port_link(struct rte_eventdev *dev, void *port, const uint8_t queues[],
169 const uint8_t priorities[] __rte_unused, uint16_t num)
171 return dsw_port_link_unlink(dev, port, queues, num, true);
175 dsw_port_unlink(struct rte_eventdev *dev, void *port, uint8_t queues[],
178 return dsw_port_link_unlink(dev, port, queues, num, false);
182 dsw_info_get(struct rte_eventdev *dev __rte_unused,
183 struct rte_event_dev_info *info)
185 *info = (struct rte_event_dev_info) {
186 .driver_name = DSW_PMD_NAME,
187 .max_event_queues = DSW_MAX_QUEUES,
188 .max_event_queue_flows = DSW_MAX_FLOWS,
189 .max_event_queue_priority_levels = 1,
190 .max_event_priority_levels = 1,
191 .max_event_ports = DSW_MAX_PORTS,
192 .max_event_port_dequeue_depth = DSW_MAX_PORT_DEQUEUE_DEPTH,
193 .max_event_port_enqueue_depth = DSW_MAX_PORT_ENQUEUE_DEPTH,
194 .max_num_events = DSW_MAX_EVENTS,
195 .event_dev_cap = RTE_EVENT_DEV_CAP_BURST_MODE|
196 RTE_EVENT_DEV_CAP_DISTRIBUTED_SCHED
201 dsw_configure(const struct rte_eventdev *dev)
203 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
204 const struct rte_event_dev_config *conf = &dev->data->dev_conf;
205 int32_t min_max_in_flight;
207 dsw->num_ports = conf->nb_event_ports;
208 dsw->num_queues = conf->nb_event_queues;
210 /* Avoid a situation where consumer ports are holding all the
211 * credits, without making use of them.
213 min_max_in_flight = conf->nb_event_ports * DSW_PORT_MAX_CREDITS;
215 dsw->max_inflight = RTE_MAX(conf->nb_events_limit, min_max_in_flight);
222 initial_flow_to_port_assignment(struct dsw_evdev *dsw)
225 for (queue_id = 0; queue_id < dsw->num_queues; queue_id++) {
226 struct dsw_queue *queue = &dsw->queues[queue_id];
228 for (flow_hash = 0; flow_hash < DSW_MAX_FLOWS; flow_hash++) {
230 rte_rand() % queue->num_serving_ports;
232 queue->serving_ports[port_idx];
233 dsw->queues[queue_id].flow_to_port_map[flow_hash] =
240 dsw_start(struct rte_eventdev *dev)
242 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
244 rte_atomic32_init(&dsw->credits_on_loan);
246 initial_flow_to_port_assignment(dsw);
252 dsw_port_drain_buf(uint8_t dev_id, struct rte_event *buf, uint16_t buf_len,
253 eventdev_stop_flush_t flush, void *flush_arg)
257 for (i = 0; i < buf_len; i++)
258 flush(dev_id, buf[i], flush_arg);
262 dsw_port_drain_out(uint8_t dev_id, struct dsw_evdev *dsw, struct dsw_port *port,
263 eventdev_stop_flush_t flush, void *flush_arg)
267 for (dport_id = 0; dport_id < dsw->num_ports; dport_id++)
268 if (dport_id != port->id)
269 dsw_port_drain_buf(dev_id, port->out_buffer[dport_id],
270 port->out_buffer_len[dport_id],
275 dsw_port_drain_in_ring(uint8_t dev_id, struct dsw_port *port,
276 eventdev_stop_flush_t flush, void *flush_arg)
280 while (rte_event_ring_dequeue_burst(port->in_ring, &ev, 1, NULL))
281 flush(dev_id, ev, flush_arg);
285 dsw_drain(uint8_t dev_id, struct dsw_evdev *dsw,
286 eventdev_stop_flush_t flush, void *flush_arg)
293 for (port_id = 0; port_id < dsw->num_ports; port_id++) {
294 struct dsw_port *port = &dsw->ports[port_id];
296 dsw_port_drain_out(dev_id, dsw, port, flush, flush_arg);
297 dsw_port_drain_in_ring(dev_id, port, flush, flush_arg);
302 dsw_stop(struct rte_eventdev *dev)
304 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
306 eventdev_stop_flush_t flush;
309 dev_id = dev->data->dev_id;
310 flush = dev->dev_ops->dev_stop_flush;
311 flush_arg = dev->data->dev_stop_flush_arg;
313 dsw_drain(dev_id, dsw, flush, flush_arg);
317 dsw_close(struct rte_eventdev *dev)
319 struct dsw_evdev *dsw = dsw_pmd_priv(dev);
327 static struct rte_eventdev_ops dsw_evdev_ops = {
328 .port_setup = dsw_port_setup,
329 .port_def_conf = dsw_port_def_conf,
330 .port_release = dsw_port_release,
331 .queue_setup = dsw_queue_setup,
332 .queue_def_conf = dsw_queue_def_conf,
333 .queue_release = dsw_queue_release,
334 .port_link = dsw_port_link,
335 .port_unlink = dsw_port_unlink,
336 .dev_infos_get = dsw_info_get,
337 .dev_configure = dsw_configure,
338 .dev_start = dsw_start,
339 .dev_stop = dsw_stop,
340 .dev_close = dsw_close
344 dsw_probe(struct rte_vdev_device *vdev)
347 struct rte_eventdev *dev;
348 struct dsw_evdev *dsw;
350 name = rte_vdev_device_name(vdev);
352 dev = rte_event_pmd_vdev_init(name, sizeof(struct dsw_evdev),
357 dev->dev_ops = &dsw_evdev_ops;
358 dev->enqueue = dsw_event_enqueue;
359 dev->enqueue_burst = dsw_event_enqueue_burst;
360 dev->enqueue_new_burst = dsw_event_enqueue_new_burst;
361 dev->enqueue_forward_burst = dsw_event_enqueue_forward_burst;
362 dev->dequeue = dsw_event_dequeue;
363 dev->dequeue_burst = dsw_event_dequeue_burst;
365 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
368 dsw = dev->data->dev_private;
369 dsw->data = dev->data;
375 dsw_remove(struct rte_vdev_device *vdev)
379 name = rte_vdev_device_name(vdev);
383 return rte_event_pmd_vdev_uninit(name);
386 static struct rte_vdev_driver evdev_dsw_pmd_drv = {
391 RTE_PMD_REGISTER_VDEV(EVENTDEV_NAME_DSW_PMD, evdev_dsw_pmd_drv);