1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2016-2017 Intel Corporation
8 #include "sw_evdev_log.h"
9 #include <rte_eventdev.h>
10 #include <rte_eventdev_pmd_vdev.h>
11 #include <rte_atomic.h>
13 #define SW_DEFAULT_CREDIT_QUANTA 32
14 #define SW_DEFAULT_SCHED_QUANTA 128
15 #define SW_QID_NUM_FIDS 16384
17 #define SW_Q_PRIORITY_MAX 255
18 #define SW_PORTS_MAX 64
19 #define MAX_SW_CONS_Q_DEPTH 128
20 #define SW_INFLIGHT_EVENTS_TOTAL 4096
21 /* allow for lots of over-provisioning */
22 #define MAX_SW_PROD_Q_DEPTH 4096
23 #define SW_FRAGMENTS_MAX 16
25 /* Should be power-of-two minus one, to leave room for the next pointer */
26 #define SW_EVS_PER_Q_CHUNK 255
27 #define SW_Q_CHUNK_SIZE ((SW_EVS_PER_Q_CHUNK + 1) * sizeof(struct rte_event))
29 /* report dequeue burst sizes in buckets */
30 #define SW_DEQ_STAT_BUCKET_SHIFT 2
31 /* how many packets pulled from port by sched */
32 #define SCHED_DEQUEUE_BURST_SIZE 32
34 #define SW_PORT_HIST_LIST (MAX_SW_PROD_Q_DEPTH) /* size of our history list */
35 #define NUM_SAMPLES 64 /* how many data points use for average stats */
37 #define EVENTDEV_NAME_SW_PMD event_sw
38 #define SW_PMD_NAME RTE_STR(event_sw)
39 #define SW_PMD_NAME_MAX 64
41 #define SW_SCHED_TYPE_DIRECT (RTE_SCHED_TYPE_PARALLEL + 1)
43 #define SW_NUM_POLL_BUCKETS (MAX_SW_CONS_Q_DEPTH >> SW_DEQ_STAT_BUCKET_SHIFT)
46 QE_FLAG_VALID_SHIFT = 0,
47 QE_FLAG_COMPLETE_SHIFT,
48 QE_FLAG_NOT_EOP_SHIFT,
52 #define QE_FLAG_VALID (1 << QE_FLAG_VALID_SHIFT) /* for NEW FWD, FRAG */
53 #define QE_FLAG_COMPLETE (1 << QE_FLAG_COMPLETE_SHIFT) /* set for FWD, DROP */
54 #define QE_FLAG_NOT_EOP (1 << QE_FLAG_NOT_EOP_SHIFT) /* set for FRAG only */
56 static const uint8_t sw_qe_flag_map[] = {
57 QE_FLAG_VALID /* NEW Event */,
58 QE_FLAG_VALID | QE_FLAG_COMPLETE /* FWD Event */,
59 QE_FLAG_COMPLETE /* RELEASE Event */,
61 /* Values which can be used for future support for partial
62 * events, i.e. where one event comes back to the scheduler
63 * as multiple which need to be tracked together
65 QE_FLAG_VALID | QE_FLAG_COMPLETE | QE_FLAG_NOT_EOP,
68 /* Records basic event stats at a given point. Used in port and qid structs */
69 struct sw_point_stats {
75 /* structure used to track what port a flow (FID) is pinned to */
77 /* which CQ this FID is currently pinned to */
79 /* number of packets gone to the CQ with this FID */
83 struct reorder_buffer_entry {
84 uint16_t num_fragments; /**< Number of packet fragments */
85 uint16_t fragment_index; /**< Points to the oldest valid frag */
86 uint8_t ready; /**< Entry is ready to be reordered */
87 struct rte_event fragments[SW_FRAGMENTS_MAX];
91 struct sw_queue_chunk *head;
92 struct sw_queue_chunk *tail;
99 /* set when the QID has been initialized */
101 /* The type of this QID */
103 /* Integer ID representing the queue. This is used in history lists,
104 * to identify the stage of processing.
107 struct sw_point_stats stats;
109 /* Internal priority rings for packets */
110 struct sw_iq iq[SW_IQS_MAX];
111 uint32_t iq_pkt_mask; /* A mask to indicate packets in an IQ */
112 uint64_t iq_pkt_count[SW_IQS_MAX];
114 /* Information on what CQs are polling this IQ */
115 uint32_t cq_num_mapped_cqs;
116 uint32_t cq_next_tx; /* cq to write next (non-atomic) packet */
117 uint32_t cq_map[SW_PORTS_MAX];
118 uint64_t to_port[SW_PORTS_MAX];
120 /* Track flow ids for atomic load balancing */
121 struct sw_fid_t fids[SW_QID_NUM_FIDS];
123 /* Track packet order for reordering when needed */
124 struct reorder_buffer_entry *reorder_buffer; /*< pkts await reorder */
125 struct rte_ring *reorder_buffer_freelist; /* available reorder slots */
126 uint32_t reorder_buffer_index; /* oldest valid reorder buffer entry */
127 uint32_t window_size; /* Used to wrap reorder_buffer_index */
132 struct sw_hist_list_entry {
135 struct reorder_buffer_entry *rob_entry;
141 /* new enqueue / dequeue API doesn't have an instance pointer, only the
142 * pointer to the port being enqueue/dequeued from
146 /* set when the port is initialized */
148 /* A numeric ID for the port */
151 /* An atomic counter for when the port has been unlinked, and the
152 * scheduler has not yet acked this unlink - hence there may still be
153 * events in the buffers going to the port. When the unlinks in
154 * progress is read by the scheduler, no more events will be pushed to
155 * the port - hence the scheduler core can just assign zero.
157 uint8_t unlinks_in_progress;
159 int16_t is_directed; /** Takes from a single directed QID */
161 * For loadbalanced we can optimise pulling packets from
162 * producers if there is no reordering involved
164 int16_t num_ordered_qids;
166 /** Ring and buffer for pulling events from workers for scheduling */
167 struct rte_event_ring *rx_worker_ring __rte_cache_aligned;
168 /** Ring and buffer for pushing packets to workers after scheduling */
169 struct rte_event_ring *cq_worker_ring;
173 /* num releases yet to be completed on this port */
174 uint16_t outstanding_releases __rte_cache_aligned;
175 uint16_t inflight_max; /* app requested max inflights for this port */
176 uint16_t inflight_credits; /* num credits this port has right now */
177 uint8_t implicit_release; /* release events before dequeueing */
179 uint16_t last_dequeue_burst_sz; /* how big the burst was */
180 uint64_t last_dequeue_ticks; /* used to track burst processing time */
181 uint64_t avg_pkt_ticks; /* tracks average over NUM_SAMPLES burst */
182 uint64_t total_polls; /* how many polls were counted in stats */
183 uint64_t zero_polls; /* tracks polls returning nothing */
184 uint32_t poll_buckets[SW_NUM_POLL_BUCKETS];
185 /* bucket values in 4s for shorter reporting */
187 /* History list structs, containing info on pkts egressed to worker */
188 uint16_t hist_head __rte_cache_aligned;
191 struct sw_hist_list_entry hist_list[SW_PORT_HIST_LIST];
193 /* track packets in and out of this port */
194 struct sw_point_stats stats;
197 uint32_t pp_buf_start;
198 uint32_t pp_buf_count;
199 uint16_t cq_buf_count;
200 struct rte_event pp_buf[SCHED_DEQUEUE_BURST_SIZE];
201 struct rte_event cq_buf[MAX_SW_CONS_Q_DEPTH];
203 uint8_t num_qids_mapped;
207 struct rte_eventdev_data *data;
211 uint32_t xstats_count;
212 struct sw_xstats_entry *xstats;
213 uint32_t xstats_count_mode_dev;
214 uint32_t xstats_count_mode_port;
215 uint32_t xstats_count_mode_queue;
217 /* Contains all ports - load balanced and directed */
218 struct sw_port ports[SW_PORTS_MAX] __rte_cache_aligned;
220 rte_atomic32_t inflights __rte_cache_aligned;
223 * max events in this instance. Cached here for performance.
224 * (also available in data->conf.nb_events_limit)
226 uint32_t nb_events_limit;
228 /* Internal queues - one per logical queue */
229 struct sw_qid qids[RTE_EVENT_MAX_QUEUES_PER_DEV] __rte_cache_aligned;
230 struct sw_queue_chunk *chunk_list_head;
231 struct sw_queue_chunk *chunks;
233 /* Cache how many packets are in each cq */
234 uint16_t cq_ring_space[SW_PORTS_MAX] __rte_cache_aligned;
236 /* Array of pointers to load-balanced QIDs sorted by priority level */
237 struct sw_qid *qids_prioritized[RTE_EVENT_MAX_QUEUES_PER_DEV];
240 struct sw_point_stats stats __rte_cache_aligned;
241 uint64_t sched_called;
242 int32_t sched_quanta;
243 uint64_t sched_no_iq_enqueues;
244 uint64_t sched_no_cq_enqueues;
245 uint64_t sched_cq_qid_called;
248 uint32_t credit_update_quanta;
250 /* store num stats and offset of the stats for each port */
251 uint16_t xstats_count_per_port[SW_PORTS_MAX];
252 uint16_t xstats_offset_for_port[SW_PORTS_MAX];
253 /* store num stats and offset of the stats for each queue */
254 uint16_t xstats_count_per_qid[RTE_EVENT_MAX_QUEUES_PER_DEV];
255 uint16_t xstats_offset_for_qid[RTE_EVENT_MAX_QUEUES_PER_DEV];
258 char service_name[SW_PMD_NAME_MAX];
261 static inline struct sw_evdev *
262 sw_pmd_priv(const struct rte_eventdev *eventdev)
264 return eventdev->data->dev_private;
267 static inline const struct sw_evdev *
268 sw_pmd_priv_const(const struct rte_eventdev *eventdev)
270 return eventdev->data->dev_private;
273 uint16_t sw_event_enqueue(void *port, const struct rte_event *ev);
274 uint16_t sw_event_enqueue_burst(void *port, const struct rte_event ev[],
277 uint16_t sw_event_dequeue(void *port, struct rte_event *ev, uint64_t wait);
278 uint16_t sw_event_dequeue_burst(void *port, struct rte_event *ev, uint16_t num,
280 void sw_event_schedule(struct rte_eventdev *dev);
281 int sw_xstats_init(struct sw_evdev *dev);
282 int sw_xstats_uninit(struct sw_evdev *dev);
283 int sw_xstats_get_names(const struct rte_eventdev *dev,
284 enum rte_event_dev_xstats_mode mode, uint8_t queue_port_id,
285 struct rte_event_dev_xstats_name *xstats_names,
286 unsigned int *ids, unsigned int size);
287 int sw_xstats_get(const struct rte_eventdev *dev,
288 enum rte_event_dev_xstats_mode mode, uint8_t queue_port_id,
289 const unsigned int ids[], uint64_t values[], unsigned int n);
290 uint64_t sw_xstats_get_by_name(const struct rte_eventdev *dev,
291 const char *name, unsigned int *id);
292 int sw_xstats_reset(struct rte_eventdev *dev,
293 enum rte_event_dev_xstats_mode mode,
294 int16_t queue_port_id,
295 const uint32_t ids[],
298 int test_sw_eventdev(void);
300 #endif /* _SW_EVDEV_H_ */