1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2018 Ericsson AB 3 */ 4 5 #include <stdbool.h> 6 7 #include <rte_cycles.h> 8 #include <eventdev_pmd.h> 9 #include <eventdev_pmd_vdev.h> 10 #include <rte_random.h> 11 #include <rte_ring_elem.h> 12 13 #include "dsw_evdev.h" 14 15 #define EVENTDEV_NAME_DSW_PMD event_dsw 16 17 static int 18 dsw_port_setup(struct rte_eventdev *dev, uint8_t port_id, 19 const struct rte_event_port_conf *conf) 20 { 21 struct dsw_evdev *dsw = dsw_pmd_priv(dev); 22 struct dsw_port *port; 23 struct rte_event_ring *in_ring; 24 struct rte_ring *ctl_in_ring; 25 char ring_name[RTE_RING_NAMESIZE]; 26 27 port = &dsw->ports[port_id]; 28 29 *port = (struct dsw_port) { 30 .id = port_id, 31 .dsw = dsw, 32 .dequeue_depth = conf->dequeue_depth, 33 .enqueue_depth = conf->enqueue_depth, 34 .new_event_threshold = conf->new_event_threshold 35 }; 36 37 snprintf(ring_name, sizeof(ring_name), "dsw%d_p%u", dev->data->dev_id, 38 port_id); 39 40 in_ring = rte_event_ring_create(ring_name, DSW_IN_RING_SIZE, 41 dev->data->socket_id, 42 RING_F_SC_DEQ|RING_F_EXACT_SZ); 43 44 if (in_ring == NULL) 45 return -ENOMEM; 46 47 snprintf(ring_name, sizeof(ring_name), "dswctl%d_p%u", 48 dev->data->dev_id, port_id); 49 50 ctl_in_ring = rte_ring_create_elem(ring_name, 51 sizeof(struct dsw_ctl_msg), 52 DSW_CTL_IN_RING_SIZE, 53 dev->data->socket_id, 54 RING_F_SC_DEQ|RING_F_EXACT_SZ); 55 56 if (ctl_in_ring == NULL) { 57 rte_event_ring_free(in_ring); 58 return -ENOMEM; 59 } 60 61 port->in_ring = in_ring; 62 port->ctl_in_ring = ctl_in_ring; 63 64 port->load_update_interval = 65 (DSW_LOAD_UPDATE_INTERVAL * rte_get_timer_hz()) / US_PER_S; 66 67 port->migration_interval = 68 (DSW_MIGRATION_INTERVAL * rte_get_timer_hz()) / US_PER_S; 69 70 dev->data->ports[port_id] = port; 71 72 return 0; 73 } 74 75 static void 76 dsw_port_def_conf(struct rte_eventdev *dev __rte_unused, 77 uint8_t port_id __rte_unused, 78 struct rte_event_port_conf *port_conf) 79 { 80 *port_conf = (struct rte_event_port_conf) { 81 .new_event_threshold = 1024, 82 .dequeue_depth = DSW_MAX_PORT_DEQUEUE_DEPTH / 4, 83 .enqueue_depth = DSW_MAX_PORT_ENQUEUE_DEPTH / 4 84 }; 85 } 86 87 static void 88 dsw_port_release(void *p) 89 { 90 struct dsw_port *port = p; 91 92 rte_event_ring_free(port->in_ring); 93 rte_ring_free(port->ctl_in_ring); 94 } 95 96 static int 97 dsw_queue_setup(struct rte_eventdev *dev, uint8_t queue_id, 98 const struct rte_event_queue_conf *conf) 99 { 100 struct dsw_evdev *dsw = dsw_pmd_priv(dev); 101 struct dsw_queue *queue = &dsw->queues[queue_id]; 102 103 if (RTE_EVENT_QUEUE_CFG_ALL_TYPES & conf->event_queue_cfg) 104 return -ENOTSUP; 105 106 /* SINGLE_LINK is better off treated as TYPE_ATOMIC, since it 107 * avoid the "fake" TYPE_PARALLEL flow_id assignment. Since 108 * the queue will only have a single serving port, no 109 * migration will ever happen, so the extra TYPE_ATOMIC 110 * migration overhead is avoided. 111 */ 112 if (RTE_EVENT_QUEUE_CFG_SINGLE_LINK & conf->event_queue_cfg) 113 queue->schedule_type = RTE_SCHED_TYPE_ATOMIC; 114 else { 115 if (conf->schedule_type == RTE_SCHED_TYPE_ORDERED) 116 return -ENOTSUP; 117 /* atomic or parallel */ 118 queue->schedule_type = conf->schedule_type; 119 } 120 121 queue->num_serving_ports = 0; 122 123 return 0; 124 } 125 126 static void 127 dsw_queue_def_conf(struct rte_eventdev *dev __rte_unused, 128 uint8_t queue_id __rte_unused, 129 struct rte_event_queue_conf *queue_conf) 130 { 131 *queue_conf = (struct rte_event_queue_conf) { 132 .nb_atomic_flows = 4096, 133 .schedule_type = RTE_SCHED_TYPE_ATOMIC, 134 .priority = RTE_EVENT_DEV_PRIORITY_NORMAL 135 }; 136 } 137 138 static void 139 dsw_queue_release(struct rte_eventdev *dev __rte_unused, 140 uint8_t queue_id __rte_unused) 141 { 142 } 143 144 static void 145 queue_add_port(struct dsw_queue *queue, uint16_t port_id) 146 { 147 queue->serving_ports[queue->num_serving_ports] = port_id; 148 queue->num_serving_ports++; 149 } 150 151 static bool 152 queue_remove_port(struct dsw_queue *queue, uint16_t port_id) 153 { 154 uint16_t i; 155 156 for (i = 0; i < queue->num_serving_ports; i++) 157 if (queue->serving_ports[i] == port_id) { 158 uint16_t last_idx = queue->num_serving_ports - 1; 159 if (i != last_idx) 160 queue->serving_ports[i] = 161 queue->serving_ports[last_idx]; 162 queue->num_serving_ports--; 163 return true; 164 } 165 return false; 166 } 167 168 static int 169 dsw_port_link_unlink(struct rte_eventdev *dev, void *port, 170 const uint8_t queues[], uint16_t num, bool link) 171 { 172 struct dsw_evdev *dsw = dsw_pmd_priv(dev); 173 struct dsw_port *p = port; 174 uint16_t i; 175 uint16_t count = 0; 176 177 for (i = 0; i < num; i++) { 178 uint8_t qid = queues[i]; 179 struct dsw_queue *q = &dsw->queues[qid]; 180 if (link) { 181 queue_add_port(q, p->id); 182 count++; 183 } else { 184 bool removed = queue_remove_port(q, p->id); 185 if (removed) 186 count++; 187 } 188 } 189 190 return count; 191 } 192 193 static int 194 dsw_port_link(struct rte_eventdev *dev, void *port, const uint8_t queues[], 195 const uint8_t priorities[] __rte_unused, uint16_t num) 196 { 197 return dsw_port_link_unlink(dev, port, queues, num, true); 198 } 199 200 static int 201 dsw_port_unlink(struct rte_eventdev *dev, void *port, uint8_t queues[], 202 uint16_t num) 203 { 204 return dsw_port_link_unlink(dev, port, queues, num, false); 205 } 206 207 static void 208 dsw_info_get(struct rte_eventdev *dev __rte_unused, 209 struct rte_event_dev_info *info) 210 { 211 *info = (struct rte_event_dev_info) { 212 .driver_name = DSW_PMD_NAME, 213 .max_event_queues = DSW_MAX_QUEUES, 214 .max_event_queue_flows = DSW_MAX_FLOWS, 215 .max_event_queue_priority_levels = 1, 216 .max_event_priority_levels = 1, 217 .max_event_ports = DSW_MAX_PORTS, 218 .max_event_port_dequeue_depth = DSW_MAX_PORT_DEQUEUE_DEPTH, 219 .max_event_port_enqueue_depth = DSW_MAX_PORT_ENQUEUE_DEPTH, 220 .max_num_events = DSW_MAX_EVENTS, 221 .event_dev_cap = RTE_EVENT_DEV_CAP_BURST_MODE| 222 RTE_EVENT_DEV_CAP_DISTRIBUTED_SCHED| 223 RTE_EVENT_DEV_CAP_NONSEQ_MODE| 224 RTE_EVENT_DEV_CAP_MULTIPLE_QUEUE_PORT| 225 RTE_EVENT_DEV_CAP_CARRY_FLOW_ID| 226 RTE_EVENT_DEV_CAP_REQUIRES_MAINT 227 }; 228 } 229 230 static int 231 dsw_configure(const struct rte_eventdev *dev) 232 { 233 struct dsw_evdev *dsw = dsw_pmd_priv(dev); 234 const struct rte_event_dev_config *conf = &dev->data->dev_conf; 235 int32_t min_max_in_flight; 236 237 dsw->num_ports = conf->nb_event_ports; 238 dsw->num_queues = conf->nb_event_queues; 239 240 /* Avoid a situation where consumer ports are holding all the 241 * credits, without making use of them. 242 */ 243 min_max_in_flight = conf->nb_event_ports * DSW_PORT_MAX_CREDITS; 244 245 dsw->max_inflight = RTE_MAX(conf->nb_events_limit, min_max_in_flight); 246 247 return 0; 248 } 249 250 251 static void 252 initial_flow_to_port_assignment(struct dsw_evdev *dsw) 253 { 254 uint8_t queue_id; 255 for (queue_id = 0; queue_id < dsw->num_queues; queue_id++) { 256 struct dsw_queue *queue = &dsw->queues[queue_id]; 257 uint16_t flow_hash; 258 for (flow_hash = 0; flow_hash < DSW_MAX_FLOWS; flow_hash++) { 259 uint8_t port_idx = 260 rte_rand() % queue->num_serving_ports; 261 uint8_t port_id = 262 queue->serving_ports[port_idx]; 263 dsw->queues[queue_id].flow_to_port_map[flow_hash] = 264 port_id; 265 } 266 } 267 } 268 269 static int 270 dsw_start(struct rte_eventdev *dev) 271 { 272 struct dsw_evdev *dsw = dsw_pmd_priv(dev); 273 uint16_t i; 274 uint64_t now; 275 276 dsw->credits_on_loan = 0; 277 278 initial_flow_to_port_assignment(dsw); 279 280 now = rte_get_timer_cycles(); 281 for (i = 0; i < dsw->num_ports; i++) { 282 dsw->ports[i].measurement_start = now; 283 dsw->ports[i].busy_start = now; 284 } 285 286 return 0; 287 } 288 289 static void 290 dsw_port_drain_buf(uint8_t dev_id, struct rte_event *buf, uint16_t buf_len, 291 eventdev_stop_flush_t flush, void *flush_arg) 292 { 293 uint16_t i; 294 295 for (i = 0; i < buf_len; i++) 296 flush(dev_id, buf[i], flush_arg); 297 } 298 299 static void 300 dsw_port_drain_paused(uint8_t dev_id, struct dsw_port *port, 301 eventdev_stop_flush_t flush, void *flush_arg) 302 { 303 dsw_port_drain_buf(dev_id, port->paused_events, port->paused_events_len, 304 flush, flush_arg); 305 } 306 307 static void 308 dsw_port_drain_out(uint8_t dev_id, struct dsw_evdev *dsw, struct dsw_port *port, 309 eventdev_stop_flush_t flush, void *flush_arg) 310 { 311 uint16_t dport_id; 312 313 for (dport_id = 0; dport_id < dsw->num_ports; dport_id++) 314 if (dport_id != port->id) 315 dsw_port_drain_buf(dev_id, port->out_buffer[dport_id], 316 port->out_buffer_len[dport_id], 317 flush, flush_arg); 318 } 319 320 static void 321 dsw_port_drain_in_ring(uint8_t dev_id, struct dsw_port *port, 322 eventdev_stop_flush_t flush, void *flush_arg) 323 { 324 struct rte_event ev; 325 326 while (rte_event_ring_dequeue_burst(port->in_ring, &ev, 1, NULL)) 327 flush(dev_id, ev, flush_arg); 328 } 329 330 static void 331 dsw_drain(uint8_t dev_id, struct dsw_evdev *dsw, 332 eventdev_stop_flush_t flush, void *flush_arg) 333 { 334 uint16_t port_id; 335 336 if (flush == NULL) 337 return; 338 339 for (port_id = 0; port_id < dsw->num_ports; port_id++) { 340 struct dsw_port *port = &dsw->ports[port_id]; 341 342 dsw_port_drain_out(dev_id, dsw, port, flush, flush_arg); 343 dsw_port_drain_paused(dev_id, port, flush, flush_arg); 344 dsw_port_drain_in_ring(dev_id, port, flush, flush_arg); 345 } 346 } 347 348 static void 349 dsw_stop(struct rte_eventdev *dev) 350 { 351 struct dsw_evdev *dsw = dsw_pmd_priv(dev); 352 uint8_t dev_id; 353 eventdev_stop_flush_t flush; 354 void *flush_arg; 355 356 dev_id = dev->data->dev_id; 357 flush = dev->dev_ops->dev_stop_flush; 358 flush_arg = dev->data->dev_stop_flush_arg; 359 360 dsw_drain(dev_id, dsw, flush, flush_arg); 361 } 362 363 static int 364 dsw_close(struct rte_eventdev *dev) 365 { 366 struct dsw_evdev *dsw = dsw_pmd_priv(dev); 367 368 dsw->num_ports = 0; 369 dsw->num_queues = 0; 370 371 return 0; 372 } 373 374 static int 375 dsw_eth_rx_adapter_caps_get(const struct rte_eventdev *dev __rte_unused, 376 const struct rte_eth_dev *eth_dev __rte_unused, 377 uint32_t *caps) 378 { 379 *caps = RTE_EVENT_ETH_RX_ADAPTER_SW_CAP; 380 return 0; 381 } 382 383 static int 384 dsw_timer_adapter_caps_get(const struct rte_eventdev *dev __rte_unused, 385 uint64_t flags __rte_unused, uint32_t *caps, 386 const struct event_timer_adapter_ops **ops) 387 { 388 *caps = 0; 389 *ops = NULL; 390 return 0; 391 } 392 393 static int 394 dsw_crypto_adapter_caps_get(const struct rte_eventdev *dev __rte_unused, 395 const struct rte_cryptodev *cdev __rte_unused, 396 uint32_t *caps) 397 { 398 *caps = RTE_EVENT_CRYPTO_ADAPTER_SW_CAP; 399 return 0; 400 } 401 402 static struct eventdev_ops dsw_evdev_ops = { 403 .port_setup = dsw_port_setup, 404 .port_def_conf = dsw_port_def_conf, 405 .port_release = dsw_port_release, 406 .queue_setup = dsw_queue_setup, 407 .queue_def_conf = dsw_queue_def_conf, 408 .queue_release = dsw_queue_release, 409 .port_link = dsw_port_link, 410 .port_unlink = dsw_port_unlink, 411 .dev_infos_get = dsw_info_get, 412 .dev_configure = dsw_configure, 413 .dev_start = dsw_start, 414 .dev_stop = dsw_stop, 415 .dev_close = dsw_close, 416 .eth_rx_adapter_caps_get = dsw_eth_rx_adapter_caps_get, 417 .timer_adapter_caps_get = dsw_timer_adapter_caps_get, 418 .crypto_adapter_caps_get = dsw_crypto_adapter_caps_get, 419 .xstats_get = dsw_xstats_get, 420 .xstats_get_names = dsw_xstats_get_names, 421 .xstats_get_by_name = dsw_xstats_get_by_name 422 }; 423 424 static int 425 dsw_probe(struct rte_vdev_device *vdev) 426 { 427 const char *name; 428 struct rte_eventdev *dev; 429 struct dsw_evdev *dsw; 430 431 name = rte_vdev_device_name(vdev); 432 433 dev = rte_event_pmd_vdev_init(name, sizeof(struct dsw_evdev), 434 rte_socket_id()); 435 if (dev == NULL) 436 return -EFAULT; 437 438 dev->dev_ops = &dsw_evdev_ops; 439 dev->enqueue = dsw_event_enqueue; 440 dev->enqueue_burst = dsw_event_enqueue_burst; 441 dev->enqueue_new_burst = dsw_event_enqueue_new_burst; 442 dev->enqueue_forward_burst = dsw_event_enqueue_forward_burst; 443 dev->dequeue = dsw_event_dequeue; 444 dev->dequeue_burst = dsw_event_dequeue_burst; 445 dev->maintain = dsw_event_maintain; 446 447 if (rte_eal_process_type() != RTE_PROC_PRIMARY) 448 return 0; 449 450 dsw = dev->data->dev_private; 451 dsw->data = dev->data; 452 453 event_dev_probing_finish(dev); 454 return 0; 455 } 456 457 static int 458 dsw_remove(struct rte_vdev_device *vdev) 459 { 460 const char *name; 461 462 name = rte_vdev_device_name(vdev); 463 if (name == NULL) 464 return -EINVAL; 465 466 return rte_event_pmd_vdev_uninit(name); 467 } 468 469 static struct rte_vdev_driver evdev_dsw_pmd_drv = { 470 .probe = dsw_probe, 471 .remove = dsw_remove 472 }; 473 474 RTE_PMD_REGISTER_VDEV(EVENTDEV_NAME_DSW_PMD, evdev_dsw_pmd_drv); 475