1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2016 Cavium, Inc. 3 * Copyright(c) 2016-2018 Intel Corporation. 4 * Copyright 2016 NXP 5 * All rights reserved. 6 */ 7 8 #ifndef _RTE_EVENTDEV_H_ 9 #define _RTE_EVENTDEV_H_ 10 11 /** 12 * @file 13 * 14 * RTE Event Device API 15 * 16 * In a polling model, lcores poll ethdev ports and associated rx queues 17 * directly to look for packet. In an event driven model, by contrast, lcores 18 * call the scheduler that selects packets for them based on programmer 19 * specified criteria. Eventdev library adds support for event driven 20 * programming model, which offer applications automatic multicore scaling, 21 * dynamic load balancing, pipelining, packet ingress order maintenance and 22 * synchronization services to simplify application packet processing. 23 * 24 * The Event Device API is composed of two parts: 25 * 26 * - The application-oriented Event API that includes functions to setup 27 * an event device (configure it, setup its queues, ports and start it), to 28 * establish the link between queues to port and to receive events, and so on. 29 * 30 * - The driver-oriented Event API that exports a function allowing 31 * an event poll Mode Driver (PMD) to simultaneously register itself as 32 * an event device driver. 33 * 34 * Event device components: 35 * 36 * +-----------------+ 37 * | +-------------+ | 38 * +-------+ | | flow 0 | | 39 * |Packet | | +-------------+ | 40 * |event | | +-------------+ | 41 * | | | | flow 1 | |port_link(port0, queue0) 42 * +-------+ | +-------------+ | | +--------+ 43 * +-------+ | +-------------+ o-----v-----o |dequeue +------+ 44 * |Crypto | | | flow n | | | event +------->|Core 0| 45 * |work | | +-------------+ o----+ | port 0 | | | 46 * |done ev| | event queue 0 | | +--------+ +------+ 47 * +-------+ +-----------------+ | 48 * +-------+ | 49 * |Timer | +-----------------+ | +--------+ 50 * |expiry | | +-------------+ | +------o |dequeue +------+ 51 * |event | | | flow 0 | o-----------o event +------->|Core 1| 52 * +-------+ | +-------------+ | +----o port 1 | | | 53 * Event enqueue | +-------------+ | | +--------+ +------+ 54 * o-------------> | | flow 1 | | | 55 * enqueue( | +-------------+ | | 56 * queue_id, | | | +--------+ +------+ 57 * flow_id, | +-------------+ | | | |dequeue |Core 2| 58 * sched_type, | | flow n | o-----------o event +------->| | 59 * event_type, | +-------------+ | | | port 2 | +------+ 60 * subev_type, | event queue 1 | | +--------+ 61 * event) +-----------------+ | +--------+ 62 * | | |dequeue +------+ 63 * +-------+ +-----------------+ | | event +------->|Core n| 64 * |Core | | +-------------+ o-----------o port n | | | 65 * |(SW) | | | flow 0 | | | +--------+ +--+---+ 66 * |event | | +-------------+ | | | 67 * +-------+ | +-------------+ | | | 68 * ^ | | flow 1 | | | | 69 * | | +-------------+ o------+ | 70 * | | +-------------+ | | 71 * | | | flow n | | | 72 * | | +-------------+ | | 73 * | | event queue n | | 74 * | +-----------------+ | 75 * | | 76 * +-----------------------------------------------------------+ 77 * 78 * Event device: A hardware or software-based event scheduler. 79 * 80 * Event: A unit of scheduling that encapsulates a packet or other datatype 81 * like SW generated event from the CPU, Crypto work completion notification, 82 * Timer expiry event notification etc as well as metadata. 83 * The metadata includes flow ID, scheduling type, event priority, event_type, 84 * sub_event_type etc. 85 * 86 * Event queue: A queue containing events that are scheduled by the event dev. 87 * An event queue contains events of different flows associated with scheduling 88 * types, such as atomic, ordered, or parallel. 89 * 90 * Event port: An application's interface into the event dev for enqueue and 91 * dequeue operations. Each event port can be linked with one or more 92 * event queues for dequeue operations. 93 * 94 * By default, all the functions of the Event Device API exported by a PMD 95 * are lock-free functions which assume to not be invoked in parallel on 96 * different logical cores to work on the same target object. For instance, 97 * the dequeue function of a PMD cannot be invoked in parallel on two logical 98 * cores to operates on same event port. Of course, this function 99 * can be invoked in parallel by different logical cores on different ports. 100 * It is the responsibility of the upper level application to enforce this rule. 101 * 102 * In all functions of the Event API, the Event device is 103 * designated by an integer >= 0 named the device identifier *dev_id* 104 * 105 * At the Event driver level, Event devices are represented by a generic 106 * data structure of type *rte_event_dev*. 107 * 108 * Event devices are dynamically registered during the PCI/SoC device probing 109 * phase performed at EAL initialization time. 110 * When an Event device is being probed, a *rte_event_dev* structure and 111 * a new device identifier are allocated for that device. Then, the 112 * event_dev_init() function supplied by the Event driver matching the probed 113 * device is invoked to properly initialize the device. 114 * 115 * The role of the device init function consists of resetting the hardware or 116 * software event driver implementations. 117 * 118 * If the device init operation is successful, the correspondence between 119 * the device identifier assigned to the new device and its associated 120 * *rte_event_dev* structure is effectively registered. 121 * Otherwise, both the *rte_event_dev* structure and the device identifier are 122 * freed. 123 * 124 * The functions exported by the application Event API to setup a device 125 * designated by its device identifier must be invoked in the following order: 126 * - rte_event_dev_configure() 127 * - rte_event_queue_setup() 128 * - rte_event_port_setup() 129 * - rte_event_port_link() 130 * - rte_event_dev_start() 131 * 132 * Then, the application can invoke, in any order, the functions 133 * exported by the Event API to schedule events, dequeue events, enqueue events, 134 * change event queue(s) to event port [un]link establishment and so on. 135 * 136 * Application may use rte_event_[queue/port]_default_conf_get() to get the 137 * default configuration to set up an event queue or event port by 138 * overriding few default values. 139 * 140 * If the application wants to change the configuration (i.e. call 141 * rte_event_dev_configure(), rte_event_queue_setup(), or 142 * rte_event_port_setup()), it must call rte_event_dev_stop() first to stop the 143 * device and then do the reconfiguration before calling rte_event_dev_start() 144 * again. The schedule, enqueue and dequeue functions should not be invoked 145 * when the device is stopped. 146 * 147 * Finally, an application can close an Event device by invoking the 148 * rte_event_dev_close() function. 149 * 150 * Each function of the application Event API invokes a specific function 151 * of the PMD that controls the target device designated by its device 152 * identifier. 153 * 154 * For this purpose, all device-specific functions of an Event driver are 155 * supplied through a set of pointers contained in a generic structure of type 156 * *event_dev_ops*. 157 * The address of the *event_dev_ops* structure is stored in the *rte_event_dev* 158 * structure by the device init function of the Event driver, which is 159 * invoked during the PCI/SoC device probing phase, as explained earlier. 160 * 161 * In other words, each function of the Event API simply retrieves the 162 * *rte_event_dev* structure associated with the device identifier and 163 * performs an indirect invocation of the corresponding driver function 164 * supplied in the *event_dev_ops* structure of the *rte_event_dev* structure. 165 * 166 * For performance reasons, the address of the fast-path functions of the 167 * Event driver is not contained in the *event_dev_ops* structure. 168 * Instead, they are directly stored at the beginning of the *rte_event_dev* 169 * structure to avoid an extra indirect memory access during their invocation. 170 * 171 * RTE event device drivers do not use interrupts for enqueue or dequeue 172 * operation. Instead, Event drivers export Poll-Mode enqueue and dequeue 173 * functions to applications. 174 * 175 * The events are injected to event device through *enqueue* operation by 176 * event producers in the system. The typical event producers are ethdev 177 * subsystem for generating packet events, CPU(SW) for generating events based 178 * on different stages of application processing, cryptodev for generating 179 * crypto work completion notification etc 180 * 181 * The *dequeue* operation gets one or more events from the event ports. 182 * The application process the events and send to downstream event queue through 183 * rte_event_enqueue_burst() if it is an intermediate stage of event processing, 184 * on the final stage, the application may use Tx adapter API for maintaining 185 * the ingress order and then send the packet/event on the wire. 186 * 187 * The point at which events are scheduled to ports depends on the device. 188 * For hardware devices, scheduling occurs asynchronously without any software 189 * intervention. Software schedulers can either be distributed 190 * (each worker thread schedules events to its own port) or centralized 191 * (a dedicated thread schedules to all ports). Distributed software schedulers 192 * perform the scheduling in rte_event_dequeue_burst(), whereas centralized 193 * scheduler logic need a dedicated service core for scheduling. 194 * The RTE_EVENT_DEV_CAP_DISTRIBUTED_SCHED capability flag is not set 195 * indicates the device is centralized and thus needs a dedicated scheduling 196 * thread that repeatedly calls software specific scheduling function. 197 * 198 * An event driven worker thread has following typical workflow on fastpath: 199 * \code{.c} 200 * while (1) { 201 * rte_event_dequeue_burst(...); 202 * (event processing) 203 * rte_event_enqueue_burst(...); 204 * } 205 * \endcode 206 * 207 */ 208 209 #ifdef __cplusplus 210 extern "C" { 211 #endif 212 213 #include <rte_common.h> 214 #include <rte_errno.h> 215 #include <rte_mbuf_pool_ops.h> 216 #include <rte_mempool.h> 217 218 #include "rte_eventdev_trace_fp.h" 219 220 struct rte_mbuf; /* we just use mbuf pointers; no need to include rte_mbuf.h */ 221 struct rte_event; 222 223 /* Event device capability bitmap flags */ 224 #define RTE_EVENT_DEV_CAP_QUEUE_QOS (1ULL << 0) 225 /**< Event scheduling prioritization is based on the priority associated with 226 * each event queue. 227 * 228 * @see rte_event_queue_setup() 229 */ 230 #define RTE_EVENT_DEV_CAP_EVENT_QOS (1ULL << 1) 231 /**< Event scheduling prioritization is based on the priority associated with 232 * each event. Priority of each event is supplied in *rte_event* structure 233 * on each enqueue operation. 234 * 235 * @see rte_event_enqueue_burst() 236 */ 237 #define RTE_EVENT_DEV_CAP_DISTRIBUTED_SCHED (1ULL << 2) 238 /**< Event device operates in distributed scheduling mode. 239 * In distributed scheduling mode, event scheduling happens in HW or 240 * rte_event_dequeue_burst() or the combination of these two. 241 * If the flag is not set then eventdev is centralized and thus needs a 242 * dedicated service core that acts as a scheduling thread . 243 * 244 * @see rte_event_dequeue_burst() 245 */ 246 #define RTE_EVENT_DEV_CAP_QUEUE_ALL_TYPES (1ULL << 3) 247 /**< Event device is capable of enqueuing events of any type to any queue. 248 * If this capability is not set, the queue only supports events of the 249 * *RTE_SCHED_TYPE_* type that it was created with. 250 * 251 * @see RTE_SCHED_TYPE_* values 252 */ 253 #define RTE_EVENT_DEV_CAP_BURST_MODE (1ULL << 4) 254 /**< Event device is capable of operating in burst mode for enqueue(forward, 255 * release) and dequeue operation. If this capability is not set, application 256 * still uses the rte_event_dequeue_burst() and rte_event_enqueue_burst() but 257 * PMD accepts only one event at a time. 258 * 259 * @see rte_event_dequeue_burst() rte_event_enqueue_burst() 260 */ 261 #define RTE_EVENT_DEV_CAP_IMPLICIT_RELEASE_DISABLE (1ULL << 5) 262 /**< Event device ports support disabling the implicit release feature, in 263 * which the port will release all unreleased events in its dequeue operation. 264 * If this capability is set and the port is configured with implicit release 265 * disabled, the application is responsible for explicitly releasing events 266 * using either the RTE_EVENT_OP_FORWARD or the RTE_EVENT_OP_RELEASE event 267 * enqueue operations. 268 * 269 * @see rte_event_dequeue_burst() rte_event_enqueue_burst() 270 */ 271 272 #define RTE_EVENT_DEV_CAP_NONSEQ_MODE (1ULL << 6) 273 /**< Event device is capable of operating in none sequential mode. The path 274 * of the event is not necessary to be sequential. Application can change 275 * the path of event at runtime. If the flag is not set, then event each event 276 * will follow a path from queue 0 to queue 1 to queue 2 etc. If the flag is 277 * set, events may be sent to queues in any order. If the flag is not set, the 278 * eventdev will return an error when the application enqueues an event for a 279 * qid which is not the next in the sequence. 280 */ 281 282 #define RTE_EVENT_DEV_CAP_RUNTIME_PORT_LINK (1ULL << 7) 283 /**< Event device is capable of configuring the queue/port link at runtime. 284 * If the flag is not set, the eventdev queue/port link is only can be 285 * configured during initialization. 286 */ 287 288 #define RTE_EVENT_DEV_CAP_MULTIPLE_QUEUE_PORT (1ULL << 8) 289 /**< Event device is capable of setting up the link between multiple queue 290 * with single port. If the flag is not set, the eventdev can only map a 291 * single queue to each port or map a single queue to many port. 292 */ 293 294 #define RTE_EVENT_DEV_CAP_CARRY_FLOW_ID (1ULL << 9) 295 /**< Event device preserves the flow ID from the enqueued 296 * event to the dequeued event if the flag is set. Otherwise, 297 * the content of this field is implementation dependent. 298 */ 299 300 #define RTE_EVENT_DEV_CAP_MAINTENANCE_FREE (1ULL << 10) 301 /**< Event device *does not* require calls to rte_event_maintain(). 302 * An event device that does not set this flag requires calls to 303 * rte_event_maintain() during periods when neither 304 * rte_event_dequeue_burst() nor rte_event_enqueue_burst() are called 305 * on a port. This will allow the event device to perform internal 306 * processing, such as flushing buffered events, return credits to a 307 * global pool, or process signaling related to load balancing. 308 */ 309 310 /* Event device priority levels */ 311 #define RTE_EVENT_DEV_PRIORITY_HIGHEST 0 312 /**< Highest priority expressed across eventdev subsystem 313 * @see rte_event_queue_setup(), rte_event_enqueue_burst() 314 * @see rte_event_port_link() 315 */ 316 #define RTE_EVENT_DEV_PRIORITY_NORMAL 128 317 /**< Normal priority expressed across eventdev subsystem 318 * @see rte_event_queue_setup(), rte_event_enqueue_burst() 319 * @see rte_event_port_link() 320 */ 321 #define RTE_EVENT_DEV_PRIORITY_LOWEST 255 322 /**< Lowest priority expressed across eventdev subsystem 323 * @see rte_event_queue_setup(), rte_event_enqueue_burst() 324 * @see rte_event_port_link() 325 */ 326 327 /** 328 * Get the total number of event devices that have been successfully 329 * initialised. 330 * 331 * @return 332 * The total number of usable event devices. 333 */ 334 uint8_t 335 rte_event_dev_count(void); 336 337 /** 338 * Get the device identifier for the named event device. 339 * 340 * @param name 341 * Event device name to select the event device identifier. 342 * 343 * @return 344 * Returns event device identifier on success. 345 * - <0: Failure to find named event device. 346 */ 347 int 348 rte_event_dev_get_dev_id(const char *name); 349 350 /** 351 * Return the NUMA socket to which a device is connected. 352 * 353 * @param dev_id 354 * The identifier of the device. 355 * @return 356 * The NUMA socket id to which the device is connected or 357 * a default of zero if the socket could not be determined. 358 * -(-EINVAL) dev_id value is out of range. 359 */ 360 int 361 rte_event_dev_socket_id(uint8_t dev_id); 362 363 /** 364 * Event device information 365 */ 366 struct rte_event_dev_info { 367 const char *driver_name; /**< Event driver name */ 368 struct rte_device *dev; /**< Device information */ 369 uint32_t min_dequeue_timeout_ns; 370 /**< Minimum supported global dequeue timeout(ns) by this device */ 371 uint32_t max_dequeue_timeout_ns; 372 /**< Maximum supported global dequeue timeout(ns) by this device */ 373 uint32_t dequeue_timeout_ns; 374 /**< Configured global dequeue timeout(ns) for this device */ 375 uint8_t max_event_queues; 376 /**< Maximum event_queues supported by this device */ 377 uint32_t max_event_queue_flows; 378 /**< Maximum supported flows in an event queue by this device*/ 379 uint8_t max_event_queue_priority_levels; 380 /**< Maximum number of event queue priority levels by this device. 381 * Valid when the device has RTE_EVENT_DEV_CAP_QUEUE_QOS capability 382 */ 383 uint8_t max_event_priority_levels; 384 /**< Maximum number of event priority levels by this device. 385 * Valid when the device has RTE_EVENT_DEV_CAP_EVENT_QOS capability 386 */ 387 uint8_t max_event_ports; 388 /**< Maximum number of event ports supported by this device */ 389 uint8_t max_event_port_dequeue_depth; 390 /**< Maximum number of events can be dequeued at a time from an 391 * event port by this device. 392 * A device that does not support bulk dequeue will set this as 1. 393 */ 394 uint32_t max_event_port_enqueue_depth; 395 /**< Maximum number of events can be enqueued at a time from an 396 * event port by this device. 397 * A device that does not support bulk enqueue will set this as 1. 398 */ 399 uint8_t max_event_port_links; 400 /**< Maximum number of queues that can be linked to a single event 401 * port by this device. 402 */ 403 int32_t max_num_events; 404 /**< A *closed system* event dev has a limit on the number of events it 405 * can manage at a time. An *open system* event dev does not have a 406 * limit and will specify this as -1. 407 */ 408 uint32_t event_dev_cap; 409 /**< Event device capabilities(RTE_EVENT_DEV_CAP_)*/ 410 uint8_t max_single_link_event_port_queue_pairs; 411 /**< Maximum number of event ports and queues that are optimized for 412 * (and only capable of) single-link configurations supported by this 413 * device. These ports and queues are not accounted for in 414 * max_event_ports or max_event_queues. 415 */ 416 }; 417 418 /** 419 * Retrieve the contextual information of an event device. 420 * 421 * @param dev_id 422 * The identifier of the device. 423 * 424 * @param[out] dev_info 425 * A pointer to a structure of type *rte_event_dev_info* to be filled with the 426 * contextual information of the device. 427 * 428 * @return 429 * - 0: Success, driver updates the contextual information of the event device 430 * - <0: Error code returned by the driver info get function. 431 * 432 */ 433 int 434 rte_event_dev_info_get(uint8_t dev_id, struct rte_event_dev_info *dev_info); 435 436 /** 437 * The count of ports. 438 */ 439 #define RTE_EVENT_DEV_ATTR_PORT_COUNT 0 440 /** 441 * The count of queues. 442 */ 443 #define RTE_EVENT_DEV_ATTR_QUEUE_COUNT 1 444 /** 445 * The status of the device, zero for stopped, non-zero for started. 446 */ 447 #define RTE_EVENT_DEV_ATTR_STARTED 2 448 449 /** 450 * Get an attribute from a device. 451 * 452 * @param dev_id Eventdev id 453 * @param attr_id The attribute ID to retrieve 454 * @param[out] attr_value A pointer that will be filled in with the attribute 455 * value if successful. 456 * 457 * @return 458 * - 0: Successfully retrieved attribute value 459 * - -EINVAL: Invalid device or *attr_id* provided, or *attr_value* is NULL 460 */ 461 int 462 rte_event_dev_attr_get(uint8_t dev_id, uint32_t attr_id, 463 uint32_t *attr_value); 464 465 466 /* Event device configuration bitmap flags */ 467 #define RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT (1ULL << 0) 468 /**< Override the global *dequeue_timeout_ns* and use per dequeue timeout in ns. 469 * @see rte_event_dequeue_timeout_ticks(), rte_event_dequeue_burst() 470 */ 471 472 /** Event device configuration structure */ 473 struct rte_event_dev_config { 474 uint32_t dequeue_timeout_ns; 475 /**< rte_event_dequeue_burst() timeout on this device. 476 * This value should be in the range of *min_dequeue_timeout_ns* and 477 * *max_dequeue_timeout_ns* which previously provided in 478 * rte_event_dev_info_get() 479 * The value 0 is allowed, in which case, default dequeue timeout used. 480 * @see RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT 481 */ 482 int32_t nb_events_limit; 483 /**< In a *closed system* this field is the limit on maximum number of 484 * events that can be inflight in the eventdev at a given time. The 485 * limit is required to ensure that the finite space in a closed system 486 * is not overwhelmed. The value cannot exceed the *max_num_events* 487 * as provided by rte_event_dev_info_get(). 488 * This value should be set to -1 for *open system*. 489 */ 490 uint8_t nb_event_queues; 491 /**< Number of event queues to configure on this device. 492 * This value cannot exceed the *max_event_queues* which previously 493 * provided in rte_event_dev_info_get() 494 */ 495 uint8_t nb_event_ports; 496 /**< Number of event ports to configure on this device. 497 * This value cannot exceed the *max_event_ports* which previously 498 * provided in rte_event_dev_info_get() 499 */ 500 uint32_t nb_event_queue_flows; 501 /**< Number of flows for any event queue on this device. 502 * This value cannot exceed the *max_event_queue_flows* which previously 503 * provided in rte_event_dev_info_get() 504 */ 505 uint32_t nb_event_port_dequeue_depth; 506 /**< Maximum number of events can be dequeued at a time from an 507 * event port by this device. 508 * This value cannot exceed the *max_event_port_dequeue_depth* 509 * which previously provided in rte_event_dev_info_get(). 510 * Ignored when device is not RTE_EVENT_DEV_CAP_BURST_MODE capable. 511 * @see rte_event_port_setup() 512 */ 513 uint32_t nb_event_port_enqueue_depth; 514 /**< Maximum number of events can be enqueued at a time from an 515 * event port by this device. 516 * This value cannot exceed the *max_event_port_enqueue_depth* 517 * which previously provided in rte_event_dev_info_get(). 518 * Ignored when device is not RTE_EVENT_DEV_CAP_BURST_MODE capable. 519 * @see rte_event_port_setup() 520 */ 521 uint32_t event_dev_cfg; 522 /**< Event device config flags(RTE_EVENT_DEV_CFG_)*/ 523 uint8_t nb_single_link_event_port_queues; 524 /**< Number of event ports and queues that will be singly-linked to 525 * each other. These are a subset of the overall event ports and 526 * queues; this value cannot exceed *nb_event_ports* or 527 * *nb_event_queues*. If the device has ports and queues that are 528 * optimized for single-link usage, this field is a hint for how many 529 * to allocate; otherwise, regular event ports and queues can be used. 530 */ 531 }; 532 533 /** 534 * Configure an event device. 535 * 536 * This function must be invoked first before any other function in the 537 * API. This function can also be re-invoked when a device is in the 538 * stopped state. 539 * 540 * The caller may use rte_event_dev_info_get() to get the capability of each 541 * resources available for this event device. 542 * 543 * @param dev_id 544 * The identifier of the device to configure. 545 * @param dev_conf 546 * The event device configuration structure. 547 * 548 * @return 549 * - 0: Success, device configured. 550 * - <0: Error code returned by the driver configuration function. 551 */ 552 int 553 rte_event_dev_configure(uint8_t dev_id, 554 const struct rte_event_dev_config *dev_conf); 555 556 /* Event queue specific APIs */ 557 558 /* Event queue configuration bitmap flags */ 559 #define RTE_EVENT_QUEUE_CFG_ALL_TYPES (1ULL << 0) 560 /**< Allow ATOMIC,ORDERED,PARALLEL schedule type enqueue 561 * 562 * @see RTE_SCHED_TYPE_ORDERED, RTE_SCHED_TYPE_ATOMIC, RTE_SCHED_TYPE_PARALLEL 563 * @see rte_event_enqueue_burst() 564 */ 565 #define RTE_EVENT_QUEUE_CFG_SINGLE_LINK (1ULL << 1) 566 /**< This event queue links only to a single event port. 567 * 568 * @see rte_event_port_setup(), rte_event_port_link() 569 */ 570 571 /** Event queue configuration structure */ 572 struct rte_event_queue_conf { 573 uint32_t nb_atomic_flows; 574 /**< The maximum number of active flows this queue can track at any 575 * given time. If the queue is configured for atomic scheduling (by 576 * applying the RTE_EVENT_QUEUE_CFG_ALL_TYPES flag to event_queue_cfg 577 * or RTE_SCHED_TYPE_ATOMIC flag to schedule_type), then the 578 * value must be in the range of [1, nb_event_queue_flows], which was 579 * previously provided in rte_event_dev_configure(). 580 */ 581 uint32_t nb_atomic_order_sequences; 582 /**< The maximum number of outstanding events waiting to be 583 * reordered by this queue. In other words, the number of entries in 584 * this queue’s reorder buffer.When the number of events in the 585 * reorder buffer reaches to *nb_atomic_order_sequences* then the 586 * scheduler cannot schedule the events from this queue and invalid 587 * event will be returned from dequeue until one or more entries are 588 * freed up/released. 589 * If the queue is configured for ordered scheduling (by applying the 590 * RTE_EVENT_QUEUE_CFG_ALL_TYPES flag to event_queue_cfg or 591 * RTE_SCHED_TYPE_ORDERED flag to schedule_type), then the value must 592 * be in the range of [1, nb_event_queue_flows], which was 593 * previously supplied to rte_event_dev_configure(). 594 */ 595 uint32_t event_queue_cfg; 596 /**< Queue cfg flags(EVENT_QUEUE_CFG_) */ 597 uint8_t schedule_type; 598 /**< Queue schedule type(RTE_SCHED_TYPE_*). 599 * Valid when RTE_EVENT_QUEUE_CFG_ALL_TYPES bit is not set in 600 * event_queue_cfg. 601 */ 602 uint8_t priority; 603 /**< Priority for this event queue relative to other event queues. 604 * The requested priority should in the range of 605 * [RTE_EVENT_DEV_PRIORITY_HIGHEST, RTE_EVENT_DEV_PRIORITY_LOWEST]. 606 * The implementation shall normalize the requested priority to 607 * event device supported priority value. 608 * Valid when the device has RTE_EVENT_DEV_CAP_QUEUE_QOS capability 609 */ 610 }; 611 612 /** 613 * Retrieve the default configuration information of an event queue designated 614 * by its *queue_id* from the event driver for an event device. 615 * 616 * This function intended to be used in conjunction with rte_event_queue_setup() 617 * where caller needs to set up the queue by overriding few default values. 618 * 619 * @param dev_id 620 * The identifier of the device. 621 * @param queue_id 622 * The index of the event queue to get the configuration information. 623 * The value must be in the range [0, nb_event_queues - 1] 624 * previously supplied to rte_event_dev_configure(). 625 * @param[out] queue_conf 626 * The pointer to the default event queue configuration data. 627 * @return 628 * - 0: Success, driver updates the default event queue configuration data. 629 * - <0: Error code returned by the driver info get function. 630 * 631 * @see rte_event_queue_setup() 632 * 633 */ 634 int 635 rte_event_queue_default_conf_get(uint8_t dev_id, uint8_t queue_id, 636 struct rte_event_queue_conf *queue_conf); 637 638 /** 639 * Allocate and set up an event queue for an event device. 640 * 641 * @param dev_id 642 * The identifier of the device. 643 * @param queue_id 644 * The index of the event queue to setup. The value must be in the range 645 * [0, nb_event_queues - 1] previously supplied to rte_event_dev_configure(). 646 * @param queue_conf 647 * The pointer to the configuration data to be used for the event queue. 648 * NULL value is allowed, in which case default configuration used. 649 * 650 * @see rte_event_queue_default_conf_get() 651 * 652 * @return 653 * - 0: Success, event queue correctly set up. 654 * - <0: event queue configuration failed 655 */ 656 int 657 rte_event_queue_setup(uint8_t dev_id, uint8_t queue_id, 658 const struct rte_event_queue_conf *queue_conf); 659 660 /** 661 * The priority of the queue. 662 */ 663 #define RTE_EVENT_QUEUE_ATTR_PRIORITY 0 664 /** 665 * The number of atomic flows configured for the queue. 666 */ 667 #define RTE_EVENT_QUEUE_ATTR_NB_ATOMIC_FLOWS 1 668 /** 669 * The number of atomic order sequences configured for the queue. 670 */ 671 #define RTE_EVENT_QUEUE_ATTR_NB_ATOMIC_ORDER_SEQUENCES 2 672 /** 673 * The cfg flags for the queue. 674 */ 675 #define RTE_EVENT_QUEUE_ATTR_EVENT_QUEUE_CFG 3 676 /** 677 * The schedule type of the queue. 678 */ 679 #define RTE_EVENT_QUEUE_ATTR_SCHEDULE_TYPE 4 680 681 /** 682 * Get an attribute from a queue. 683 * 684 * @param dev_id 685 * Eventdev id 686 * @param queue_id 687 * Eventdev queue id 688 * @param attr_id 689 * The attribute ID to retrieve 690 * @param[out] attr_value 691 * A pointer that will be filled in with the attribute value if successful 692 * 693 * @return 694 * - 0: Successfully returned value 695 * - -EINVAL: invalid device, queue or attr_id provided, or attr_value was 696 * NULL 697 * - -EOVERFLOW: returned when attr_id is set to 698 * RTE_EVENT_QUEUE_ATTR_SCHEDULE_TYPE and event_queue_cfg is set to 699 * RTE_EVENT_QUEUE_CFG_ALL_TYPES 700 */ 701 int 702 rte_event_queue_attr_get(uint8_t dev_id, uint8_t queue_id, uint32_t attr_id, 703 uint32_t *attr_value); 704 705 /* Event port specific APIs */ 706 707 /* Event port configuration bitmap flags */ 708 #define RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL (1ULL << 0) 709 /**< Configure the port not to release outstanding events in 710 * rte_event_dev_dequeue_burst(). If set, all events received through 711 * the port must be explicitly released with RTE_EVENT_OP_RELEASE or 712 * RTE_EVENT_OP_FORWARD. Must be unset if the device is not 713 * RTE_EVENT_DEV_CAP_IMPLICIT_RELEASE_DISABLE capable. 714 */ 715 #define RTE_EVENT_PORT_CFG_SINGLE_LINK (1ULL << 1) 716 /**< This event port links only to a single event queue. 717 * 718 * @see rte_event_port_setup(), rte_event_port_link() 719 */ 720 #define RTE_EVENT_PORT_CFG_HINT_PRODUCER (1ULL << 2) 721 /**< Hint that this event port will primarily enqueue events to the system. 722 * A PMD can optimize its internal workings by assuming that this port is 723 * primarily going to enqueue NEW events. 724 * 725 * Note that this flag is only a hint, so PMDs must operate under the 726 * assumption that any port can enqueue an event with any type of op. 727 * 728 * @see rte_event_port_setup() 729 */ 730 #define RTE_EVENT_PORT_CFG_HINT_CONSUMER (1ULL << 3) 731 /**< Hint that this event port will primarily dequeue events from the system. 732 * A PMD can optimize its internal workings by assuming that this port is 733 * primarily going to consume events, and not enqueue FORWARD or RELEASE 734 * events. 735 * 736 * Note that this flag is only a hint, so PMDs must operate under the 737 * assumption that any port can enqueue an event with any type of op. 738 * 739 * @see rte_event_port_setup() 740 */ 741 #define RTE_EVENT_PORT_CFG_HINT_WORKER (1ULL << 4) 742 /**< Hint that this event port will primarily pass existing events through. 743 * A PMD can optimize its internal workings by assuming that this port is 744 * primarily going to FORWARD events, and not enqueue NEW or RELEASE events 745 * often. 746 * 747 * Note that this flag is only a hint, so PMDs must operate under the 748 * assumption that any port can enqueue an event with any type of op. 749 * 750 * @see rte_event_port_setup() 751 */ 752 753 /** Event port configuration structure */ 754 struct rte_event_port_conf { 755 int32_t new_event_threshold; 756 /**< A backpressure threshold for new event enqueues on this port. 757 * Use for *closed system* event dev where event capacity is limited, 758 * and cannot exceed the capacity of the event dev. 759 * Configuring ports with different thresholds can make higher priority 760 * traffic less likely to be backpressured. 761 * For example, a port used to inject NIC Rx packets into the event dev 762 * can have a lower threshold so as not to overwhelm the device, 763 * while ports used for worker pools can have a higher threshold. 764 * This value cannot exceed the *nb_events_limit* 765 * which was previously supplied to rte_event_dev_configure(). 766 * This should be set to '-1' for *open system*. 767 */ 768 uint16_t dequeue_depth; 769 /**< Configure number of bulk dequeues for this event port. 770 * This value cannot exceed the *nb_event_port_dequeue_depth* 771 * which previously supplied to rte_event_dev_configure(). 772 * Ignored when device is not RTE_EVENT_DEV_CAP_BURST_MODE capable. 773 */ 774 uint16_t enqueue_depth; 775 /**< Configure number of bulk enqueues for this event port. 776 * This value cannot exceed the *nb_event_port_enqueue_depth* 777 * which previously supplied to rte_event_dev_configure(). 778 * Ignored when device is not RTE_EVENT_DEV_CAP_BURST_MODE capable. 779 */ 780 uint32_t event_port_cfg; /**< Port cfg flags(EVENT_PORT_CFG_) */ 781 }; 782 783 /** 784 * Retrieve the default configuration information of an event port designated 785 * by its *port_id* from the event driver for an event device. 786 * 787 * This function intended to be used in conjunction with rte_event_port_setup() 788 * where caller needs to set up the port by overriding few default values. 789 * 790 * @param dev_id 791 * The identifier of the device. 792 * @param port_id 793 * The index of the event port to get the configuration information. 794 * The value must be in the range [0, nb_event_ports - 1] 795 * previously supplied to rte_event_dev_configure(). 796 * @param[out] port_conf 797 * The pointer to the default event port configuration data 798 * @return 799 * - 0: Success, driver updates the default event port configuration data. 800 * - <0: Error code returned by the driver info get function. 801 * 802 * @see rte_event_port_setup() 803 * 804 */ 805 int 806 rte_event_port_default_conf_get(uint8_t dev_id, uint8_t port_id, 807 struct rte_event_port_conf *port_conf); 808 809 /** 810 * Allocate and set up an event port for an event device. 811 * 812 * @param dev_id 813 * The identifier of the device. 814 * @param port_id 815 * The index of the event port to setup. The value must be in the range 816 * [0, nb_event_ports - 1] previously supplied to rte_event_dev_configure(). 817 * @param port_conf 818 * The pointer to the configuration data to be used for the queue. 819 * NULL value is allowed, in which case default configuration used. 820 * 821 * @see rte_event_port_default_conf_get() 822 * 823 * @return 824 * - 0: Success, event port correctly set up. 825 * - <0: Port configuration failed 826 * - (-EDQUOT) Quota exceeded(Application tried to link the queue configured 827 * with RTE_EVENT_QUEUE_CFG_SINGLE_LINK to more than one event ports) 828 */ 829 int 830 rte_event_port_setup(uint8_t dev_id, uint8_t port_id, 831 const struct rte_event_port_conf *port_conf); 832 833 /** 834 * The queue depth of the port on the enqueue side 835 */ 836 #define RTE_EVENT_PORT_ATTR_ENQ_DEPTH 0 837 /** 838 * The queue depth of the port on the dequeue side 839 */ 840 #define RTE_EVENT_PORT_ATTR_DEQ_DEPTH 1 841 /** 842 * The new event threshold of the port 843 */ 844 #define RTE_EVENT_PORT_ATTR_NEW_EVENT_THRESHOLD 2 845 /** 846 * The implicit release disable attribute of the port 847 */ 848 #define RTE_EVENT_PORT_ATTR_IMPLICIT_RELEASE_DISABLE 3 849 850 /** 851 * Get an attribute from a port. 852 * 853 * @param dev_id 854 * Eventdev id 855 * @param port_id 856 * Eventdev port id 857 * @param attr_id 858 * The attribute ID to retrieve 859 * @param[out] attr_value 860 * A pointer that will be filled in with the attribute value if successful 861 * 862 * @return 863 * - 0: Successfully returned value 864 * - (-EINVAL) Invalid device, port or attr_id, or attr_value was NULL 865 */ 866 int 867 rte_event_port_attr_get(uint8_t dev_id, uint8_t port_id, uint32_t attr_id, 868 uint32_t *attr_value); 869 870 /** 871 * Start an event device. 872 * 873 * The device start step is the last one and consists of setting the event 874 * queues to start accepting the events and schedules to event ports. 875 * 876 * On success, all basic functions exported by the API (event enqueue, 877 * event dequeue and so on) can be invoked. 878 * 879 * @param dev_id 880 * Event device identifier 881 * @return 882 * - 0: Success, device started. 883 * - -ESTALE : Not all ports of the device are configured 884 * - -ENOLINK: Not all queues are linked, which could lead to deadlock. 885 */ 886 int 887 rte_event_dev_start(uint8_t dev_id); 888 889 /** 890 * Stop an event device. 891 * 892 * This function causes all queued events to be drained, including those 893 * residing in event ports. While draining events out of the device, this 894 * function calls the user-provided flush callback (if one was registered) once 895 * per event. 896 * 897 * The device can be restarted with a call to rte_event_dev_start(). Threads 898 * that continue to enqueue/dequeue while the device is stopped, or being 899 * stopped, will result in undefined behavior. This includes event adapters, 900 * which must be stopped prior to stopping the eventdev. 901 * 902 * @param dev_id 903 * Event device identifier. 904 * 905 * @see rte_event_dev_stop_flush_callback_register() 906 */ 907 void 908 rte_event_dev_stop(uint8_t dev_id); 909 910 typedef void (*eventdev_stop_flush_t)(uint8_t dev_id, struct rte_event event, 911 void *arg); 912 /**< Callback function called during rte_event_dev_stop(), invoked once per 913 * flushed event. 914 */ 915 916 /** 917 * Registers a callback function to be invoked during rte_event_dev_stop() for 918 * each flushed event. This function can be used to properly dispose of queued 919 * events, for example events containing memory pointers. 920 * 921 * The callback function is only registered for the calling process. The 922 * callback function must be registered in every process that can call 923 * rte_event_dev_stop(). 924 * 925 * To unregister a callback, call this function with a NULL callback pointer. 926 * 927 * @param dev_id 928 * The identifier of the device. 929 * @param callback 930 * Callback function invoked once per flushed event. 931 * @param userdata 932 * Argument supplied to callback. 933 * 934 * @return 935 * - 0 on success. 936 * - -EINVAL if *dev_id* is invalid 937 * 938 * @see rte_event_dev_stop() 939 */ 940 int 941 rte_event_dev_stop_flush_callback_register(uint8_t dev_id, 942 eventdev_stop_flush_t callback, void *userdata); 943 944 /** 945 * Close an event device. The device cannot be restarted! 946 * 947 * @param dev_id 948 * Event device identifier 949 * 950 * @return 951 * - 0 on successfully closing device 952 * - <0 on failure to close device 953 * - (-EAGAIN) if device is busy 954 */ 955 int 956 rte_event_dev_close(uint8_t dev_id); 957 958 /** 959 * Event vector structure. 960 */ 961 struct rte_event_vector { 962 uint16_t nb_elem; 963 /**< Number of elements in this event vector. */ 964 uint16_t rsvd : 15; 965 /**< Reserved for future use */ 966 uint16_t attr_valid : 1; 967 /**< Indicates that the below union attributes have valid information. 968 */ 969 union { 970 /* Used by Rx/Tx adapter. 971 * Indicates that all the elements in this vector belong to the 972 * same port and queue pair when originating from Rx adapter, 973 * valid only when event type is ETHDEV_VECTOR or 974 * ETH_RX_ADAPTER_VECTOR. 975 * Can also be used to indicate the Tx adapter the destination 976 * port and queue of the mbufs in the vector 977 */ 978 struct { 979 uint16_t port; 980 /* Ethernet device port id. */ 981 uint16_t queue; 982 /* Ethernet device queue id. */ 983 }; 984 }; 985 /**< Union to hold common attributes of the vector array. */ 986 uint64_t impl_opaque; 987 /**< Implementation specific opaque value. 988 * An implementation may use this field to hold implementation specific 989 * value to share between dequeue and enqueue operation. 990 * The application should not modify this field. 991 */ 992 union { 993 struct rte_mbuf *mbufs[0]; 994 void *ptrs[0]; 995 uint64_t *u64s[0]; 996 } __rte_aligned(16); 997 /**< Start of the vector array union. Depending upon the event type the 998 * vector array can be an array of mbufs or pointers or opaque u64 999 * values. 1000 */ 1001 }; 1002 1003 /* Scheduler type definitions */ 1004 #define RTE_SCHED_TYPE_ORDERED 0 1005 /**< Ordered scheduling 1006 * 1007 * Events from an ordered flow of an event queue can be scheduled to multiple 1008 * ports for concurrent processing while maintaining the original event order. 1009 * This scheme enables the user to achieve high single flow throughput by 1010 * avoiding SW synchronization for ordering between ports which bound to cores. 1011 * 1012 * The source flow ordering from an event queue is maintained when events are 1013 * enqueued to their destination queue within the same ordered flow context. 1014 * An event port holds the context until application call 1015 * rte_event_dequeue_burst() from the same port, which implicitly releases 1016 * the context. 1017 * User may allow the scheduler to release the context earlier than that 1018 * by invoking rte_event_enqueue_burst() with RTE_EVENT_OP_RELEASE operation. 1019 * 1020 * Events from the source queue appear in their original order when dequeued 1021 * from a destination queue. 1022 * Event ordering is based on the received event(s), but also other 1023 * (newly allocated or stored) events are ordered when enqueued within the same 1024 * ordered context. Events not enqueued (e.g. released or stored) within the 1025 * context are considered missing from reordering and are skipped at this time 1026 * (but can be ordered again within another context). 1027 * 1028 * @see rte_event_queue_setup(), rte_event_dequeue_burst(), RTE_EVENT_OP_RELEASE 1029 */ 1030 1031 #define RTE_SCHED_TYPE_ATOMIC 1 1032 /**< Atomic scheduling 1033 * 1034 * Events from an atomic flow of an event queue can be scheduled only to a 1035 * single port at a time. The port is guaranteed to have exclusive (atomic) 1036 * access to the associated flow context, which enables the user to avoid SW 1037 * synchronization. Atomic flows also help to maintain event ordering 1038 * since only one port at a time can process events from a flow of an 1039 * event queue. 1040 * 1041 * The atomic queue synchronization context is dedicated to the port until 1042 * application call rte_event_dequeue_burst() from the same port, 1043 * which implicitly releases the context. User may allow the scheduler to 1044 * release the context earlier than that by invoking rte_event_enqueue_burst() 1045 * with RTE_EVENT_OP_RELEASE operation. 1046 * 1047 * @see rte_event_queue_setup(), rte_event_dequeue_burst(), RTE_EVENT_OP_RELEASE 1048 */ 1049 1050 #define RTE_SCHED_TYPE_PARALLEL 2 1051 /**< Parallel scheduling 1052 * 1053 * The scheduler performs priority scheduling, load balancing, etc. functions 1054 * but does not provide additional event synchronization or ordering. 1055 * It is free to schedule events from a single parallel flow of an event queue 1056 * to multiple events ports for concurrent processing. 1057 * The application is responsible for flow context synchronization and 1058 * event ordering (SW synchronization). 1059 * 1060 * @see rte_event_queue_setup(), rte_event_dequeue_burst() 1061 */ 1062 1063 /* Event types to classify the event source */ 1064 #define RTE_EVENT_TYPE_ETHDEV 0x0 1065 /**< The event generated from ethdev subsystem */ 1066 #define RTE_EVENT_TYPE_CRYPTODEV 0x1 1067 /**< The event generated from crypodev subsystem */ 1068 #define RTE_EVENT_TYPE_TIMER 0x2 1069 /**< The event generated from event timer adapter */ 1070 #define RTE_EVENT_TYPE_CPU 0x3 1071 /**< The event generated from cpu for pipelining. 1072 * Application may use *sub_event_type* to further classify the event 1073 */ 1074 #define RTE_EVENT_TYPE_ETH_RX_ADAPTER 0x4 1075 /**< The event generated from event eth Rx adapter */ 1076 #define RTE_EVENT_TYPE_VECTOR 0x8 1077 /**< Indicates that event is a vector. 1078 * All vector event types should be a logical OR of EVENT_TYPE_VECTOR. 1079 * This simplifies the pipeline design as one can split processing the events 1080 * between vector events and normal event across event types. 1081 * Example: 1082 * if (ev.event_type & RTE_EVENT_TYPE_VECTOR) { 1083 * // Classify and handle vector event. 1084 * } else { 1085 * // Classify and handle event. 1086 * } 1087 */ 1088 #define RTE_EVENT_TYPE_ETHDEV_VECTOR \ 1089 (RTE_EVENT_TYPE_VECTOR | RTE_EVENT_TYPE_ETHDEV) 1090 /**< The event vector generated from ethdev subsystem */ 1091 #define RTE_EVENT_TYPE_CPU_VECTOR (RTE_EVENT_TYPE_VECTOR | RTE_EVENT_TYPE_CPU) 1092 /**< The event vector generated from cpu for pipelining. */ 1093 #define RTE_EVENT_TYPE_ETH_RX_ADAPTER_VECTOR \ 1094 (RTE_EVENT_TYPE_VECTOR | RTE_EVENT_TYPE_ETH_RX_ADAPTER) 1095 /**< The event vector generated from eth Rx adapter. */ 1096 1097 #define RTE_EVENT_TYPE_MAX 0x10 1098 /**< Maximum number of event types */ 1099 1100 /* Event enqueue operations */ 1101 #define RTE_EVENT_OP_NEW 0 1102 /**< The event producers use this operation to inject a new event to the 1103 * event device. 1104 */ 1105 #define RTE_EVENT_OP_FORWARD 1 1106 /**< The CPU use this operation to forward the event to different event queue or 1107 * change to new application specific flow or schedule type to enable 1108 * pipelining. 1109 * 1110 * This operation must only be enqueued to the same port that the 1111 * event to be forwarded was dequeued from. 1112 */ 1113 #define RTE_EVENT_OP_RELEASE 2 1114 /**< Release the flow context associated with the schedule type. 1115 * 1116 * If current flow's scheduler type method is *RTE_SCHED_TYPE_ATOMIC* 1117 * then this function hints the scheduler that the user has completed critical 1118 * section processing in the current atomic context. 1119 * The scheduler is now allowed to schedule events from the same flow from 1120 * an event queue to another port. However, the context may be still held 1121 * until the next rte_event_dequeue_burst() call, this call allows but does not 1122 * force the scheduler to release the context early. 1123 * 1124 * Early atomic context release may increase parallelism and thus system 1125 * performance, but the user needs to design carefully the split into critical 1126 * vs non-critical sections. 1127 * 1128 * If current flow's scheduler type method is *RTE_SCHED_TYPE_ORDERED* 1129 * then this function hints the scheduler that the user has done all that need 1130 * to maintain event order in the current ordered context. 1131 * The scheduler is allowed to release the ordered context of this port and 1132 * avoid reordering any following enqueues. 1133 * 1134 * Early ordered context release may increase parallelism and thus system 1135 * performance. 1136 * 1137 * If current flow's scheduler type method is *RTE_SCHED_TYPE_PARALLEL* 1138 * or no scheduling context is held then this function may be an NOOP, 1139 * depending on the implementation. 1140 * 1141 * This operation must only be enqueued to the same port that the 1142 * event to be released was dequeued from. 1143 * 1144 */ 1145 1146 /** 1147 * The generic *rte_event* structure to hold the event attributes 1148 * for dequeue and enqueue operation 1149 */ 1150 RTE_STD_C11 1151 struct rte_event { 1152 /** WORD0 */ 1153 union { 1154 uint64_t event; 1155 /** Event attributes for dequeue or enqueue operation */ 1156 struct { 1157 uint32_t flow_id:20; 1158 /**< Targeted flow identifier for the enqueue and 1159 * dequeue operation. 1160 * The value must be in the range of 1161 * [0, nb_event_queue_flows - 1] which 1162 * previously supplied to rte_event_dev_configure(). 1163 */ 1164 uint32_t sub_event_type:8; 1165 /**< Sub-event types based on the event source. 1166 * @see RTE_EVENT_TYPE_CPU 1167 */ 1168 uint32_t event_type:4; 1169 /**< Event type to classify the event source. 1170 * @see RTE_EVENT_TYPE_ETHDEV, (RTE_EVENT_TYPE_*) 1171 */ 1172 uint8_t op:2; 1173 /**< The type of event enqueue operation - new/forward/ 1174 * etc.This field is not preserved across an instance 1175 * and is undefined on dequeue. 1176 * @see RTE_EVENT_OP_NEW, (RTE_EVENT_OP_*) 1177 */ 1178 uint8_t rsvd:4; 1179 /**< Reserved for future use */ 1180 uint8_t sched_type:2; 1181 /**< Scheduler synchronization type (RTE_SCHED_TYPE_*) 1182 * associated with flow id on a given event queue 1183 * for the enqueue and dequeue operation. 1184 */ 1185 uint8_t queue_id; 1186 /**< Targeted event queue identifier for the enqueue or 1187 * dequeue operation. 1188 * The value must be in the range of 1189 * [0, nb_event_queues - 1] which previously supplied to 1190 * rte_event_dev_configure(). 1191 */ 1192 uint8_t priority; 1193 /**< Event priority relative to other events in the 1194 * event queue. The requested priority should in the 1195 * range of [RTE_EVENT_DEV_PRIORITY_HIGHEST, 1196 * RTE_EVENT_DEV_PRIORITY_LOWEST]. 1197 * The implementation shall normalize the requested 1198 * priority to supported priority value. 1199 * Valid when the device has 1200 * RTE_EVENT_DEV_CAP_EVENT_QOS capability. 1201 */ 1202 uint8_t impl_opaque; 1203 /**< Implementation specific opaque value. 1204 * An implementation may use this field to hold 1205 * implementation specific value to share between 1206 * dequeue and enqueue operation. 1207 * The application should not modify this field. 1208 */ 1209 }; 1210 }; 1211 /** WORD1 */ 1212 union { 1213 uint64_t u64; 1214 /**< Opaque 64-bit value */ 1215 void *event_ptr; 1216 /**< Opaque event pointer */ 1217 struct rte_mbuf *mbuf; 1218 /**< mbuf pointer if dequeued event is associated with mbuf */ 1219 struct rte_event_vector *vec; 1220 /**< Event vector pointer. */ 1221 }; 1222 }; 1223 1224 /* Ethdev Rx adapter capability bitmap flags */ 1225 #define RTE_EVENT_ETH_RX_ADAPTER_CAP_INTERNAL_PORT 0x1 1226 /**< This flag is sent when the packet transfer mechanism is in HW. 1227 * Ethdev can send packets to the event device using internal event port. 1228 */ 1229 #define RTE_EVENT_ETH_RX_ADAPTER_CAP_MULTI_EVENTQ 0x2 1230 /**< Adapter supports multiple event queues per ethdev. Every ethdev 1231 * Rx queue can be connected to a unique event queue. 1232 */ 1233 #define RTE_EVENT_ETH_RX_ADAPTER_CAP_OVERRIDE_FLOW_ID 0x4 1234 /**< The application can override the adapter generated flow ID in the 1235 * event. This flow ID can be specified when adding an ethdev Rx queue 1236 * to the adapter using the ev.flow_id member. 1237 * @see struct rte_event_eth_rx_adapter_queue_conf::ev 1238 * @see struct rte_event_eth_rx_adapter_queue_conf::rx_queue_flags 1239 */ 1240 #define RTE_EVENT_ETH_RX_ADAPTER_CAP_EVENT_VECTOR 0x8 1241 /**< Adapter supports event vectorization per ethdev. */ 1242 1243 /** 1244 * Retrieve the event device's ethdev Rx adapter capabilities for the 1245 * specified ethernet port 1246 * 1247 * @param dev_id 1248 * The identifier of the device. 1249 * 1250 * @param eth_port_id 1251 * The identifier of the ethernet device. 1252 * 1253 * @param[out] caps 1254 * A pointer to memory filled with Rx event adapter capabilities. 1255 * 1256 * @return 1257 * - 0: Success, driver provides Rx event adapter capabilities for the 1258 * ethernet device. 1259 * - <0: Error code returned by the driver function. 1260 * 1261 */ 1262 int 1263 rte_event_eth_rx_adapter_caps_get(uint8_t dev_id, uint16_t eth_port_id, 1264 uint32_t *caps); 1265 1266 #define RTE_EVENT_TIMER_ADAPTER_CAP_INTERNAL_PORT (1ULL << 0) 1267 /**< This flag is set when the timer mechanism is in HW. */ 1268 1269 #define RTE_EVENT_TIMER_ADAPTER_CAP_PERIODIC (1ULL << 1) 1270 /**< This flag is set if periodic mode is supported. */ 1271 1272 /** 1273 * Retrieve the event device's timer adapter capabilities. 1274 * 1275 * @param dev_id 1276 * The identifier of the device. 1277 * 1278 * @param[out] caps 1279 * A pointer to memory to be filled with event timer adapter capabilities. 1280 * 1281 * @return 1282 * - 0: Success, driver provided event timer adapter capabilities. 1283 * - <0: Error code returned by the driver function. 1284 */ 1285 int 1286 rte_event_timer_adapter_caps_get(uint8_t dev_id, uint32_t *caps); 1287 1288 /* Crypto adapter capability bitmap flag */ 1289 #define RTE_EVENT_CRYPTO_ADAPTER_CAP_INTERNAL_PORT_OP_NEW 0x1 1290 /**< Flag indicates HW is capable of generating events in 1291 * RTE_EVENT_OP_NEW enqueue operation. Cryptodev will send 1292 * packets to the event device as new events using an internal 1293 * event port. 1294 */ 1295 1296 #define RTE_EVENT_CRYPTO_ADAPTER_CAP_INTERNAL_PORT_OP_FWD 0x2 1297 /**< Flag indicates HW is capable of generating events in 1298 * RTE_EVENT_OP_FORWARD enqueue operation. Cryptodev will send 1299 * packets to the event device as forwarded event using an 1300 * internal event port. 1301 */ 1302 1303 #define RTE_EVENT_CRYPTO_ADAPTER_CAP_INTERNAL_PORT_QP_EV_BIND 0x4 1304 /**< Flag indicates HW is capable of mapping crypto queue pair to 1305 * event queue. 1306 */ 1307 1308 #define RTE_EVENT_CRYPTO_ADAPTER_CAP_SESSION_PRIVATE_DATA 0x8 1309 /**< Flag indicates HW/SW supports a mechanism to store and retrieve 1310 * the private data information along with the crypto session. 1311 */ 1312 1313 /** 1314 * Retrieve the event device's crypto adapter capabilities for the 1315 * specified cryptodev device 1316 * 1317 * @param dev_id 1318 * The identifier of the device. 1319 * 1320 * @param cdev_id 1321 * The identifier of the cryptodev device. 1322 * 1323 * @param[out] caps 1324 * A pointer to memory filled with event adapter capabilities. 1325 * It is expected to be pre-allocated & initialized by caller. 1326 * 1327 * @return 1328 * - 0: Success, driver provides event adapter capabilities for the 1329 * cryptodev device. 1330 * - <0: Error code returned by the driver function. 1331 * 1332 */ 1333 int 1334 rte_event_crypto_adapter_caps_get(uint8_t dev_id, uint8_t cdev_id, 1335 uint32_t *caps); 1336 1337 /* Ethdev Tx adapter capability bitmap flags */ 1338 #define RTE_EVENT_ETH_TX_ADAPTER_CAP_INTERNAL_PORT 0x1 1339 /**< This flag is sent when the PMD supports a packet transmit callback 1340 */ 1341 #define RTE_EVENT_ETH_TX_ADAPTER_CAP_EVENT_VECTOR 0x2 1342 /**< Indicates that the Tx adapter is capable of handling event vector of 1343 * mbufs. 1344 */ 1345 1346 /** 1347 * Retrieve the event device's eth Tx adapter capabilities 1348 * 1349 * @param dev_id 1350 * The identifier of the device. 1351 * 1352 * @param eth_port_id 1353 * The identifier of the ethernet device. 1354 * 1355 * @param[out] caps 1356 * A pointer to memory filled with eth Tx adapter capabilities. 1357 * 1358 * @return 1359 * - 0: Success, driver provides eth Tx adapter capabilities. 1360 * - <0: Error code returned by the driver function. 1361 * 1362 */ 1363 int 1364 rte_event_eth_tx_adapter_caps_get(uint8_t dev_id, uint16_t eth_port_id, 1365 uint32_t *caps); 1366 1367 /** 1368 * Converts nanoseconds to *timeout_ticks* value for rte_event_dequeue_burst() 1369 * 1370 * If the device is configured with RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT flag 1371 * then application can use this function to convert timeout value in 1372 * nanoseconds to implementations specific timeout value supplied in 1373 * rte_event_dequeue_burst() 1374 * 1375 * @param dev_id 1376 * The identifier of the device. 1377 * @param ns 1378 * Wait time in nanosecond 1379 * @param[out] timeout_ticks 1380 * Value for the *timeout_ticks* parameter in rte_event_dequeue_burst() 1381 * 1382 * @return 1383 * - 0 on success. 1384 * - -ENOTSUP if the device doesn't support timeouts 1385 * - -EINVAL if *dev_id* is invalid or *timeout_ticks* is NULL 1386 * - other values < 0 on failure. 1387 * 1388 * @see rte_event_dequeue_burst(), RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT 1389 * @see rte_event_dev_configure() 1390 * 1391 */ 1392 int 1393 rte_event_dequeue_timeout_ticks(uint8_t dev_id, uint64_t ns, 1394 uint64_t *timeout_ticks); 1395 1396 /** 1397 * Link multiple source event queues supplied in *queues* to the destination 1398 * event port designated by its *port_id* with associated service priority 1399 * supplied in *priorities* on the event device designated by its *dev_id*. 1400 * 1401 * The link establishment shall enable the event port *port_id* from 1402 * receiving events from the specified event queue(s) supplied in *queues* 1403 * 1404 * An event queue may link to one or more event ports. 1405 * The number of links can be established from an event queue to event port is 1406 * implementation defined. 1407 * 1408 * Event queue(s) to event port link establishment can be changed at runtime 1409 * without re-configuring the device to support scaling and to reduce the 1410 * latency of critical work by establishing the link with more event ports 1411 * at runtime. 1412 * 1413 * @param dev_id 1414 * The identifier of the device. 1415 * 1416 * @param port_id 1417 * Event port identifier to select the destination port to link. 1418 * 1419 * @param queues 1420 * Points to an array of *nb_links* event queues to be linked 1421 * to the event port. 1422 * NULL value is allowed, in which case this function links all the configured 1423 * event queues *nb_event_queues* which previously supplied to 1424 * rte_event_dev_configure() to the event port *port_id* 1425 * 1426 * @param priorities 1427 * Points to an array of *nb_links* service priorities associated with each 1428 * event queue link to event port. 1429 * The priority defines the event port's servicing priority for 1430 * event queue, which may be ignored by an implementation. 1431 * The requested priority should in the range of 1432 * [RTE_EVENT_DEV_PRIORITY_HIGHEST, RTE_EVENT_DEV_PRIORITY_LOWEST]. 1433 * The implementation shall normalize the requested priority to 1434 * implementation supported priority value. 1435 * NULL value is allowed, in which case this function links the event queues 1436 * with RTE_EVENT_DEV_PRIORITY_NORMAL servicing priority 1437 * 1438 * @param nb_links 1439 * The number of links to establish. This parameter is ignored if queues is 1440 * NULL. 1441 * 1442 * @return 1443 * The number of links actually established. The return value can be less than 1444 * the value of the *nb_links* parameter when the implementation has the 1445 * limitation on specific queue to port link establishment or if invalid 1446 * parameters are specified in *queues* 1447 * If the return value is less than *nb_links*, the remaining links at the end 1448 * of link[] are not established, and the caller has to take care of them. 1449 * If return value is less than *nb_links* then implementation shall update the 1450 * rte_errno accordingly, Possible rte_errno values are 1451 * (EDQUOT) Quota exceeded(Application tried to link the queue configured with 1452 * RTE_EVENT_QUEUE_CFG_SINGLE_LINK to more than one event ports) 1453 * (EINVAL) Invalid parameter 1454 * 1455 */ 1456 int 1457 rte_event_port_link(uint8_t dev_id, uint8_t port_id, 1458 const uint8_t queues[], const uint8_t priorities[], 1459 uint16_t nb_links); 1460 1461 /** 1462 * Unlink multiple source event queues supplied in *queues* from the destination 1463 * event port designated by its *port_id* on the event device designated 1464 * by its *dev_id*. 1465 * 1466 * The unlink call issues an async request to disable the event port *port_id* 1467 * from receiving events from the specified event queue *queue_id*. 1468 * Event queue(s) to event port unlink establishment can be changed at runtime 1469 * without re-configuring the device. 1470 * 1471 * @see rte_event_port_unlinks_in_progress() to poll for completed unlinks. 1472 * 1473 * @param dev_id 1474 * The identifier of the device. 1475 * 1476 * @param port_id 1477 * Event port identifier to select the destination port to unlink. 1478 * 1479 * @param queues 1480 * Points to an array of *nb_unlinks* event queues to be unlinked 1481 * from the event port. 1482 * NULL value is allowed, in which case this function unlinks all the 1483 * event queue(s) from the event port *port_id*. 1484 * 1485 * @param nb_unlinks 1486 * The number of unlinks to establish. This parameter is ignored if queues is 1487 * NULL. 1488 * 1489 * @return 1490 * The number of unlinks successfully requested. The return value can be less 1491 * than the value of the *nb_unlinks* parameter when the implementation has the 1492 * limitation on specific queue to port unlink establishment or 1493 * if invalid parameters are specified. 1494 * If the return value is less than *nb_unlinks*, the remaining queues at the 1495 * end of queues[] are not unlinked, and the caller has to take care of them. 1496 * If return value is less than *nb_unlinks* then implementation shall update 1497 * the rte_errno accordingly, Possible rte_errno values are 1498 * (EINVAL) Invalid parameter 1499 */ 1500 int 1501 rte_event_port_unlink(uint8_t dev_id, uint8_t port_id, 1502 uint8_t queues[], uint16_t nb_unlinks); 1503 1504 /** 1505 * Returns the number of unlinks in progress. 1506 * 1507 * This function provides the application with a method to detect when an 1508 * unlink has been completed by the implementation. 1509 * 1510 * @see rte_event_port_unlink() to issue unlink requests. 1511 * 1512 * @param dev_id 1513 * The identifier of the device. 1514 * 1515 * @param port_id 1516 * Event port identifier to select port to check for unlinks in progress. 1517 * 1518 * @return 1519 * The number of unlinks that are in progress. A return of zero indicates that 1520 * there are no outstanding unlink requests. A positive return value indicates 1521 * the number of unlinks that are in progress, but are not yet complete. 1522 * A negative return value indicates an error, -EINVAL indicates an invalid 1523 * parameter passed for *dev_id* or *port_id*. 1524 */ 1525 int 1526 rte_event_port_unlinks_in_progress(uint8_t dev_id, uint8_t port_id); 1527 1528 /** 1529 * Retrieve the list of source event queues and its associated service priority 1530 * linked to the destination event port designated by its *port_id* 1531 * on the event device designated by its *dev_id*. 1532 * 1533 * @param dev_id 1534 * The identifier of the device. 1535 * 1536 * @param port_id 1537 * Event port identifier. 1538 * 1539 * @param[out] queues 1540 * Points to an array of *queues* for output. 1541 * The caller has to allocate *RTE_EVENT_MAX_QUEUES_PER_DEV* bytes to 1542 * store the event queue(s) linked with event port *port_id* 1543 * 1544 * @param[out] priorities 1545 * Points to an array of *priorities* for output. 1546 * The caller has to allocate *RTE_EVENT_MAX_QUEUES_PER_DEV* bytes to 1547 * store the service priority associated with each event queue linked 1548 * 1549 * @return 1550 * The number of links established on the event port designated by its 1551 * *port_id*. 1552 * - <0 on failure. 1553 * 1554 */ 1555 int 1556 rte_event_port_links_get(uint8_t dev_id, uint8_t port_id, 1557 uint8_t queues[], uint8_t priorities[]); 1558 1559 /** 1560 * Retrieve the service ID of the event dev. If the adapter doesn't use 1561 * a rte_service function, this function returns -ESRCH. 1562 * 1563 * @param dev_id 1564 * The identifier of the device. 1565 * 1566 * @param [out] service_id 1567 * A pointer to a uint32_t, to be filled in with the service id. 1568 * 1569 * @return 1570 * - 0: Success 1571 * - <0: Error code on failure, if the event dev doesn't use a rte_service 1572 * function, this function returns -ESRCH. 1573 */ 1574 int 1575 rte_event_dev_service_id_get(uint8_t dev_id, uint32_t *service_id); 1576 1577 /** 1578 * Dump internal information about *dev_id* to the FILE* provided in *f*. 1579 * 1580 * @param dev_id 1581 * The identifier of the device. 1582 * 1583 * @param f 1584 * A pointer to a file for output 1585 * 1586 * @return 1587 * - 0: on success 1588 * - <0: on failure. 1589 */ 1590 int 1591 rte_event_dev_dump(uint8_t dev_id, FILE *f); 1592 1593 /** Maximum name length for extended statistics counters */ 1594 #define RTE_EVENT_DEV_XSTATS_NAME_SIZE 64 1595 1596 /** 1597 * Selects the component of the eventdev to retrieve statistics from. 1598 */ 1599 enum rte_event_dev_xstats_mode { 1600 RTE_EVENT_DEV_XSTATS_DEVICE, 1601 RTE_EVENT_DEV_XSTATS_PORT, 1602 RTE_EVENT_DEV_XSTATS_QUEUE, 1603 }; 1604 1605 /** 1606 * A name-key lookup element for extended statistics. 1607 * 1608 * This structure is used to map between names and ID numbers 1609 * for extended ethdev statistics. 1610 */ 1611 struct rte_event_dev_xstats_name { 1612 char name[RTE_EVENT_DEV_XSTATS_NAME_SIZE]; 1613 }; 1614 1615 /** 1616 * Retrieve names of extended statistics of an event device. 1617 * 1618 * @param dev_id 1619 * The identifier of the event device. 1620 * @param mode 1621 * The mode of statistics to retrieve. Choices include the device statistics, 1622 * port statistics or queue statistics. 1623 * @param queue_port_id 1624 * Used to specify the port or queue number in queue or port mode, and is 1625 * ignored in device mode. 1626 * @param[out] xstats_names 1627 * Block of memory to insert names into. Must be at least size in capacity. 1628 * If set to NULL, function returns required capacity. 1629 * @param[out] ids 1630 * Block of memory to insert ids into. Must be at least size in capacity. 1631 * If set to NULL, function returns required capacity. The id values returned 1632 * can be passed to *rte_event_dev_xstats_get* to select statistics. 1633 * @param size 1634 * Capacity of xstats_names (number of names). 1635 * @return 1636 * - positive value lower or equal to size: success. The return value 1637 * is the number of entries filled in the stats table. 1638 * - positive value higher than size: error, the given statistics table 1639 * is too small. The return value corresponds to the size that should 1640 * be given to succeed. The entries in the table are not valid and 1641 * shall not be used by the caller. 1642 * - negative value on error: 1643 * -ENODEV for invalid *dev_id* 1644 * -EINVAL for invalid mode, queue port or id parameters 1645 * -ENOTSUP if the device doesn't support this function. 1646 */ 1647 int 1648 rte_event_dev_xstats_names_get(uint8_t dev_id, 1649 enum rte_event_dev_xstats_mode mode, 1650 uint8_t queue_port_id, 1651 struct rte_event_dev_xstats_name *xstats_names, 1652 unsigned int *ids, 1653 unsigned int size); 1654 1655 /** 1656 * Retrieve extended statistics of an event device. 1657 * 1658 * @param dev_id 1659 * The identifier of the device. 1660 * @param mode 1661 * The mode of statistics to retrieve. Choices include the device statistics, 1662 * port statistics or queue statistics. 1663 * @param queue_port_id 1664 * Used to specify the port or queue number in queue or port mode, and is 1665 * ignored in device mode. 1666 * @param ids 1667 * The id numbers of the stats to get. The ids can be got from the stat 1668 * position in the stat list from rte_event_dev_get_xstats_names(), or 1669 * by using rte_event_dev_xstats_by_name_get(). 1670 * @param[out] values 1671 * The values for each stats request by ID. 1672 * @param n 1673 * The number of stats requested 1674 * @return 1675 * - positive value: number of stat entries filled into the values array 1676 * - negative value on error: 1677 * -ENODEV for invalid *dev_id* 1678 * -EINVAL for invalid mode, queue port or id parameters 1679 * -ENOTSUP if the device doesn't support this function. 1680 */ 1681 int 1682 rte_event_dev_xstats_get(uint8_t dev_id, 1683 enum rte_event_dev_xstats_mode mode, 1684 uint8_t queue_port_id, 1685 const unsigned int ids[], 1686 uint64_t values[], unsigned int n); 1687 1688 /** 1689 * Retrieve the value of a single stat by requesting it by name. 1690 * 1691 * @param dev_id 1692 * The identifier of the device 1693 * @param name 1694 * The stat name to retrieve 1695 * @param[out] id 1696 * If non-NULL, the numerical id of the stat will be returned, so that further 1697 * requests for the stat can be got using rte_event_dev_xstats_get, which will 1698 * be faster as it doesn't need to scan a list of names for the stat. 1699 * If the stat cannot be found, the id returned will be (unsigned)-1. 1700 * @return 1701 * - positive value or zero: the stat value 1702 * - negative value: -EINVAL if stat not found, -ENOTSUP if not supported. 1703 */ 1704 uint64_t 1705 rte_event_dev_xstats_by_name_get(uint8_t dev_id, const char *name, 1706 unsigned int *id); 1707 1708 /** 1709 * Reset the values of the xstats of the selected component in the device. 1710 * 1711 * @param dev_id 1712 * The identifier of the device 1713 * @param mode 1714 * The mode of the statistics to reset. Choose from device, queue or port. 1715 * @param queue_port_id 1716 * The queue or port to reset. 0 and positive values select ports and queues, 1717 * while -1 indicates all ports or queues. 1718 * @param ids 1719 * Selects specific statistics to be reset. When NULL, all statistics selected 1720 * by *mode* will be reset. If non-NULL, must point to array of at least 1721 * *nb_ids* size. 1722 * @param nb_ids 1723 * The number of ids available from the *ids* array. Ignored when ids is NULL. 1724 * @return 1725 * - zero: successfully reset the statistics to zero 1726 * - negative value: -EINVAL invalid parameters, -ENOTSUP if not supported. 1727 */ 1728 int 1729 rte_event_dev_xstats_reset(uint8_t dev_id, 1730 enum rte_event_dev_xstats_mode mode, 1731 int16_t queue_port_id, 1732 const uint32_t ids[], 1733 uint32_t nb_ids); 1734 1735 /** 1736 * Trigger the eventdev self test. 1737 * 1738 * @param dev_id 1739 * The identifier of the device 1740 * @return 1741 * - 0: Selftest successful 1742 * - -ENOTSUP if the device doesn't support selftest 1743 * - other values < 0 on failure. 1744 */ 1745 int rte_event_dev_selftest(uint8_t dev_id); 1746 1747 /** 1748 * Get the memory required per event vector based on the number of elements per 1749 * vector. 1750 * This should be used to create the mempool that holds the event vectors. 1751 * 1752 * @param name 1753 * The name of the vector pool. 1754 * @param n 1755 * The number of elements in the mbuf pool. 1756 * @param cache_size 1757 * Size of the per-core object cache. See rte_mempool_create() for 1758 * details. 1759 * @param nb_elem 1760 * The number of elements that a single event vector should be able to hold. 1761 * @param socket_id 1762 * The socket identifier where the memory should be allocated. The 1763 * value can be *SOCKET_ID_ANY* if there is no NUMA constraint for the 1764 * reserved zone 1765 * 1766 * @return 1767 * The pointer to the newly allocated mempool, on success. NULL on error 1768 * with rte_errno set appropriately. Possible rte_errno values include: 1769 * - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure 1770 * - E_RTE_SECONDARY - function was called from a secondary process instance 1771 * - EINVAL - cache size provided is too large, or priv_size is not aligned. 1772 * - ENOSPC - the maximum number of memzones has already been allocated 1773 * - EEXIST - a memzone with the same name already exists 1774 * - ENOMEM - no appropriate memory area found in which to create memzone 1775 * - ENAMETOOLONG - mempool name requested is too long. 1776 */ 1777 struct rte_mempool * 1778 rte_event_vector_pool_create(const char *name, unsigned int n, 1779 unsigned int cache_size, uint16_t nb_elem, 1780 int socket_id); 1781 1782 #include <rte_eventdev_core.h> 1783 1784 static __rte_always_inline uint16_t 1785 __rte_event_enqueue_burst(uint8_t dev_id, uint8_t port_id, 1786 const struct rte_event ev[], uint16_t nb_events, 1787 const event_enqueue_burst_t fn) 1788 { 1789 const struct rte_event_fp_ops *fp_ops; 1790 void *port; 1791 1792 fp_ops = &rte_event_fp_ops[dev_id]; 1793 port = fp_ops->data[port_id]; 1794 #ifdef RTE_LIBRTE_EVENTDEV_DEBUG 1795 if (dev_id >= RTE_EVENT_MAX_DEVS || 1796 port_id >= RTE_EVENT_MAX_PORTS_PER_DEV) { 1797 rte_errno = EINVAL; 1798 return 0; 1799 } 1800 1801 if (port == NULL) { 1802 rte_errno = EINVAL; 1803 return 0; 1804 } 1805 #endif 1806 rte_eventdev_trace_enq_burst(dev_id, port_id, ev, nb_events, (void *)fn); 1807 /* 1808 * Allow zero cost non burst mode routine invocation if application 1809 * requests nb_events as const one 1810 */ 1811 if (nb_events == 1) 1812 return (fp_ops->enqueue)(port, ev); 1813 else 1814 return fn(port, ev, nb_events); 1815 } 1816 1817 /** 1818 * Enqueue a burst of events objects or an event object supplied in *rte_event* 1819 * structure on an event device designated by its *dev_id* through the event 1820 * port specified by *port_id*. Each event object specifies the event queue on 1821 * which it will be enqueued. 1822 * 1823 * The *nb_events* parameter is the number of event objects to enqueue which are 1824 * supplied in the *ev* array of *rte_event* structure. 1825 * 1826 * Event operations RTE_EVENT_OP_FORWARD and RTE_EVENT_OP_RELEASE must only be 1827 * enqueued to the same port that their associated events were dequeued from. 1828 * 1829 * The rte_event_enqueue_burst() function returns the number of 1830 * events objects it actually enqueued. A return value equal to *nb_events* 1831 * means that all event objects have been enqueued. 1832 * 1833 * @param dev_id 1834 * The identifier of the device. 1835 * @param port_id 1836 * The identifier of the event port. 1837 * @param ev 1838 * Points to an array of *nb_events* objects of type *rte_event* structure 1839 * which contain the event object enqueue operations to be processed. 1840 * @param nb_events 1841 * The number of event objects to enqueue, typically number of 1842 * rte_event_port_attr_get(...RTE_EVENT_PORT_ATTR_ENQ_DEPTH...) 1843 * available for this port. 1844 * 1845 * @return 1846 * The number of event objects actually enqueued on the event device. The 1847 * return value can be less than the value of the *nb_events* parameter when 1848 * the event devices queue is full or if invalid parameters are specified in a 1849 * *rte_event*. If the return value is less than *nb_events*, the remaining 1850 * events at the end of ev[] are not consumed and the caller has to take care 1851 * of them, and rte_errno is set accordingly. Possible errno values include: 1852 * - EINVAL The port ID is invalid, device ID is invalid, an event's queue 1853 * ID is invalid, or an event's sched type doesn't match the 1854 * capabilities of the destination queue. 1855 * - ENOSPC The event port was backpressured and unable to enqueue 1856 * one or more events. This error code is only applicable to 1857 * closed systems. 1858 * @see rte_event_port_attr_get(), RTE_EVENT_PORT_ATTR_ENQ_DEPTH 1859 */ 1860 static inline uint16_t 1861 rte_event_enqueue_burst(uint8_t dev_id, uint8_t port_id, 1862 const struct rte_event ev[], uint16_t nb_events) 1863 { 1864 const struct rte_event_fp_ops *fp_ops; 1865 1866 fp_ops = &rte_event_fp_ops[dev_id]; 1867 return __rte_event_enqueue_burst(dev_id, port_id, ev, nb_events, 1868 fp_ops->enqueue_burst); 1869 } 1870 1871 /** 1872 * Enqueue a burst of events objects of operation type *RTE_EVENT_OP_NEW* on 1873 * an event device designated by its *dev_id* through the event port specified 1874 * by *port_id*. 1875 * 1876 * Provides the same functionality as rte_event_enqueue_burst(), expect that 1877 * application can use this API when the all objects in the burst contains 1878 * the enqueue operation of the type *RTE_EVENT_OP_NEW*. This specialized 1879 * function can provide the additional hint to the PMD and optimize if possible. 1880 * 1881 * The rte_event_enqueue_new_burst() result is undefined if the enqueue burst 1882 * has event object of operation type != RTE_EVENT_OP_NEW. 1883 * 1884 * @param dev_id 1885 * The identifier of the device. 1886 * @param port_id 1887 * The identifier of the event port. 1888 * @param ev 1889 * Points to an array of *nb_events* objects of type *rte_event* structure 1890 * which contain the event object enqueue operations to be processed. 1891 * @param nb_events 1892 * The number of event objects to enqueue, typically number of 1893 * rte_event_port_attr_get(...RTE_EVENT_PORT_ATTR_ENQ_DEPTH...) 1894 * available for this port. 1895 * 1896 * @return 1897 * The number of event objects actually enqueued on the event device. The 1898 * return value can be less than the value of the *nb_events* parameter when 1899 * the event devices queue is full or if invalid parameters are specified in a 1900 * *rte_event*. If the return value is less than *nb_events*, the remaining 1901 * events at the end of ev[] are not consumed and the caller has to take care 1902 * of them, and rte_errno is set accordingly. Possible errno values include: 1903 * - EINVAL The port ID is invalid, device ID is invalid, an event's queue 1904 * ID is invalid, or an event's sched type doesn't match the 1905 * capabilities of the destination queue. 1906 * - ENOSPC The event port was backpressured and unable to enqueue 1907 * one or more events. This error code is only applicable to 1908 * closed systems. 1909 * @see rte_event_port_attr_get(), RTE_EVENT_PORT_ATTR_ENQ_DEPTH 1910 * @see rte_event_enqueue_burst() 1911 */ 1912 static inline uint16_t 1913 rte_event_enqueue_new_burst(uint8_t dev_id, uint8_t port_id, 1914 const struct rte_event ev[], uint16_t nb_events) 1915 { 1916 const struct rte_event_fp_ops *fp_ops; 1917 1918 fp_ops = &rte_event_fp_ops[dev_id]; 1919 return __rte_event_enqueue_burst(dev_id, port_id, ev, nb_events, 1920 fp_ops->enqueue_new_burst); 1921 } 1922 1923 /** 1924 * Enqueue a burst of events objects of operation type *RTE_EVENT_OP_FORWARD* 1925 * on an event device designated by its *dev_id* through the event port 1926 * specified by *port_id*. 1927 * 1928 * Provides the same functionality as rte_event_enqueue_burst(), expect that 1929 * application can use this API when the all objects in the burst contains 1930 * the enqueue operation of the type *RTE_EVENT_OP_FORWARD*. This specialized 1931 * function can provide the additional hint to the PMD and optimize if possible. 1932 * 1933 * The rte_event_enqueue_new_burst() result is undefined if the enqueue burst 1934 * has event object of operation type != RTE_EVENT_OP_FORWARD. 1935 * 1936 * @param dev_id 1937 * The identifier of the device. 1938 * @param port_id 1939 * The identifier of the event port. 1940 * @param ev 1941 * Points to an array of *nb_events* objects of type *rte_event* structure 1942 * which contain the event object enqueue operations to be processed. 1943 * @param nb_events 1944 * The number of event objects to enqueue, typically number of 1945 * rte_event_port_attr_get(...RTE_EVENT_PORT_ATTR_ENQ_DEPTH...) 1946 * available for this port. 1947 * 1948 * @return 1949 * The number of event objects actually enqueued on the event device. The 1950 * return value can be less than the value of the *nb_events* parameter when 1951 * the event devices queue is full or if invalid parameters are specified in a 1952 * *rte_event*. If the return value is less than *nb_events*, the remaining 1953 * events at the end of ev[] are not consumed and the caller has to take care 1954 * of them, and rte_errno is set accordingly. Possible errno values include: 1955 * - EINVAL The port ID is invalid, device ID is invalid, an event's queue 1956 * ID is invalid, or an event's sched type doesn't match the 1957 * capabilities of the destination queue. 1958 * - ENOSPC The event port was backpressured and unable to enqueue 1959 * one or more events. This error code is only applicable to 1960 * closed systems. 1961 * @see rte_event_port_attr_get(), RTE_EVENT_PORT_ATTR_ENQ_DEPTH 1962 * @see rte_event_enqueue_burst() 1963 */ 1964 static inline uint16_t 1965 rte_event_enqueue_forward_burst(uint8_t dev_id, uint8_t port_id, 1966 const struct rte_event ev[], uint16_t nb_events) 1967 { 1968 const struct rte_event_fp_ops *fp_ops; 1969 1970 fp_ops = &rte_event_fp_ops[dev_id]; 1971 return __rte_event_enqueue_burst(dev_id, port_id, ev, nb_events, 1972 fp_ops->enqueue_forward_burst); 1973 } 1974 1975 /** 1976 * Dequeue a burst of events objects or an event object from the event port 1977 * designated by its *event_port_id*, on an event device designated 1978 * by its *dev_id*. 1979 * 1980 * rte_event_dequeue_burst() does not dictate the specifics of scheduling 1981 * algorithm as each eventdev driver may have different criteria to schedule 1982 * an event. However, in general, from an application perspective scheduler may 1983 * use the following scheme to dispatch an event to the port. 1984 * 1985 * 1) Selection of event queue based on 1986 * a) The list of event queues are linked to the event port. 1987 * b) If the device has RTE_EVENT_DEV_CAP_QUEUE_QOS capability then event 1988 * queue selection from list is based on event queue priority relative to 1989 * other event queue supplied as *priority* in rte_event_queue_setup() 1990 * c) If the device has RTE_EVENT_DEV_CAP_EVENT_QOS capability then event 1991 * queue selection from the list is based on event priority supplied as 1992 * *priority* in rte_event_enqueue_burst() 1993 * 2) Selection of event 1994 * a) The number of flows available in selected event queue. 1995 * b) Schedule type method associated with the event 1996 * 1997 * The *nb_events* parameter is the maximum number of event objects to dequeue 1998 * which are returned in the *ev* array of *rte_event* structure. 1999 * 2000 * The rte_event_dequeue_burst() function returns the number of events objects 2001 * it actually dequeued. A return value equal to *nb_events* means that all 2002 * event objects have been dequeued. 2003 * 2004 * The number of events dequeued is the number of scheduler contexts held by 2005 * this port. These contexts are automatically released in the next 2006 * rte_event_dequeue_burst() invocation if the port supports implicit 2007 * releases, or invoking rte_event_enqueue_burst() with RTE_EVENT_OP_RELEASE 2008 * operation can be used to release the contexts early. 2009 * 2010 * Event operations RTE_EVENT_OP_FORWARD and RTE_EVENT_OP_RELEASE must only be 2011 * enqueued to the same port that their associated events were dequeued from. 2012 * 2013 * @param dev_id 2014 * The identifier of the device. 2015 * @param port_id 2016 * The identifier of the event port. 2017 * @param[out] ev 2018 * Points to an array of *nb_events* objects of type *rte_event* structure 2019 * for output to be populated with the dequeued event objects. 2020 * @param nb_events 2021 * The maximum number of event objects to dequeue, typically number of 2022 * rte_event_port_dequeue_depth() available for this port. 2023 * 2024 * @param timeout_ticks 2025 * - 0 no-wait, returns immediately if there is no event. 2026 * - >0 wait for the event, if the device is configured with 2027 * RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT then this function will wait until 2028 * at least one event is available or *timeout_ticks* time. 2029 * if the device is not configured with RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT 2030 * then this function will wait until the event available or 2031 * *dequeue_timeout_ns* ns which was previously supplied to 2032 * rte_event_dev_configure() 2033 * 2034 * @return 2035 * The number of event objects actually dequeued from the port. The return 2036 * value can be less than the value of the *nb_events* parameter when the 2037 * event port's queue is not full. 2038 * 2039 * @see rte_event_port_dequeue_depth() 2040 */ 2041 static inline uint16_t 2042 rte_event_dequeue_burst(uint8_t dev_id, uint8_t port_id, struct rte_event ev[], 2043 uint16_t nb_events, uint64_t timeout_ticks) 2044 { 2045 const struct rte_event_fp_ops *fp_ops; 2046 void *port; 2047 2048 fp_ops = &rte_event_fp_ops[dev_id]; 2049 port = fp_ops->data[port_id]; 2050 #ifdef RTE_LIBRTE_EVENTDEV_DEBUG 2051 if (dev_id >= RTE_EVENT_MAX_DEVS || 2052 port_id >= RTE_EVENT_MAX_PORTS_PER_DEV) { 2053 rte_errno = EINVAL; 2054 return 0; 2055 } 2056 2057 if (port == NULL) { 2058 rte_errno = EINVAL; 2059 return 0; 2060 } 2061 #endif 2062 rte_eventdev_trace_deq_burst(dev_id, port_id, ev, nb_events); 2063 /* 2064 * Allow zero cost non burst mode routine invocation if application 2065 * requests nb_events as const one 2066 */ 2067 if (nb_events == 1) 2068 return (fp_ops->dequeue)(port, ev, timeout_ticks); 2069 else 2070 return (fp_ops->dequeue_burst)(port, ev, nb_events, 2071 timeout_ticks); 2072 } 2073 2074 #define RTE_EVENT_DEV_MAINT_OP_FLUSH (1 << 0) 2075 /**< Force an immediately flush of any buffered events in the port, 2076 * potentially at the cost of additional overhead. 2077 * 2078 * @see rte_event_maintain() 2079 */ 2080 2081 /** 2082 * Maintain an event device. 2083 * 2084 * This function is only relevant for event devices which do not have 2085 * the @ref RTE_EVENT_DEV_CAP_MAINTENANCE_FREE flag set. Such devices 2086 * require an application thread using a particular port to 2087 * periodically call rte_event_maintain() on that port during periods 2088 * which it is neither attempting to enqueue events to nor dequeue 2089 * events from the port. rte_event_maintain() is a low-overhead 2090 * function and should be called at a high rate (e.g., in the 2091 * application's poll loop). 2092 * 2093 * No port may be left unmaintained. 2094 * 2095 * At the application thread's convenience, rte_event_maintain() may 2096 * (but is not required to) be called even during periods when enqueue 2097 * or dequeue functions are being called, at the cost of a slight 2098 * increase in overhead. 2099 * 2100 * rte_event_maintain() may be called on event devices which have set 2101 * @ref RTE_EVENT_DEV_CAP_MAINTENANCE_FREE, in which case it is a 2102 * no-operation. 2103 * 2104 * @param dev_id 2105 * The identifier of the device. 2106 * @param port_id 2107 * The identifier of the event port. 2108 * @param op 2109 * 0, or @ref RTE_EVENT_DEV_MAINT_OP_FLUSH. 2110 * @return 2111 * - 0 on success. 2112 * - -EINVAL if *dev_id*, *port_id*, or *op* is invalid. 2113 * 2114 * @see RTE_EVENT_DEV_CAP_MAINTENANCE_FREE 2115 */ 2116 __rte_experimental 2117 static inline int 2118 rte_event_maintain(uint8_t dev_id, uint8_t port_id, int op) 2119 { 2120 const struct rte_event_fp_ops *fp_ops; 2121 void *port; 2122 2123 fp_ops = &rte_event_fp_ops[dev_id]; 2124 port = fp_ops->data[port_id]; 2125 #ifdef RTE_LIBRTE_EVENTDEV_DEBUG 2126 if (dev_id >= RTE_EVENT_MAX_DEVS || 2127 port_id >= RTE_EVENT_MAX_PORTS_PER_DEV) 2128 return -EINVAL; 2129 2130 if (port == NULL) 2131 return -EINVAL; 2132 2133 if (op & (~RTE_EVENT_DEV_MAINT_OP_FLUSH)) 2134 return -EINVAL; 2135 #endif 2136 rte_eventdev_trace_maintain(dev_id, port_id, op); 2137 2138 if (fp_ops->maintain != NULL) 2139 fp_ops->maintain(port, op); 2140 2141 return 0; 2142 } 2143 2144 #ifdef __cplusplus 2145 } 2146 #endif 2147 2148 #endif /* _RTE_EVENTDEV_H_ */ 2149