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 int16_t is_directed
; /** Takes from a single directed QID */
153 * For loadbalanced we can optimise pulling packets from
154 * producers if there is no reordering involved
156 int16_t num_ordered_qids
;
158 /** Ring and buffer for pulling events from workers for scheduling */
159 struct rte_event_ring
*rx_worker_ring __rte_cache_aligned
;
160 /** Ring and buffer for pushing packets to workers after scheduling */
161 struct rte_event_ring
*cq_worker_ring
;
165 /* num releases yet to be completed on this port */
166 uint16_t outstanding_releases __rte_cache_aligned
;
167 uint16_t inflight_max
; /* app requested max inflights for this port */
168 uint16_t inflight_credits
; /* num credits this port has right now */
169 uint8_t implicit_release
; /* release events before dequeueing */
171 uint16_t last_dequeue_burst_sz
; /* how big the burst was */
172 uint64_t last_dequeue_ticks
; /* used to track burst processing time */
173 uint64_t avg_pkt_ticks
; /* tracks average over NUM_SAMPLES burst */
174 uint64_t total_polls
; /* how many polls were counted in stats */
175 uint64_t zero_polls
; /* tracks polls returning nothing */
176 uint32_t poll_buckets
[SW_NUM_POLL_BUCKETS
];
177 /* bucket values in 4s for shorter reporting */
179 /* History list structs, containing info on pkts egressed to worker */
180 uint16_t hist_head __rte_cache_aligned
;
183 struct sw_hist_list_entry hist_list
[SW_PORT_HIST_LIST
];
185 /* track packets in and out of this port */
186 struct sw_point_stats stats
;
189 uint32_t pp_buf_start
;
190 uint32_t pp_buf_count
;
191 uint16_t cq_buf_count
;
192 struct rte_event pp_buf
[SCHED_DEQUEUE_BURST_SIZE
];
193 struct rte_event cq_buf
[MAX_SW_CONS_Q_DEPTH
];
195 uint8_t num_qids_mapped
;
199 struct rte_eventdev_data
*data
;
203 uint32_t xstats_count
;
204 struct sw_xstats_entry
*xstats
;
205 uint32_t xstats_count_mode_dev
;
206 uint32_t xstats_count_mode_port
;
207 uint32_t xstats_count_mode_queue
;
209 /* Contains all ports - load balanced and directed */
210 struct sw_port ports
[SW_PORTS_MAX
] __rte_cache_aligned
;
212 rte_atomic32_t inflights __rte_cache_aligned
;
215 * max events in this instance. Cached here for performance.
216 * (also available in data->conf.nb_events_limit)
218 uint32_t nb_events_limit
;
220 /* Internal queues - one per logical queue */
221 struct sw_qid qids
[RTE_EVENT_MAX_QUEUES_PER_DEV
] __rte_cache_aligned
;
222 struct sw_queue_chunk
*chunk_list_head
;
223 struct sw_queue_chunk
*chunks
;
225 /* Cache how many packets are in each cq */
226 uint16_t cq_ring_space
[SW_PORTS_MAX
] __rte_cache_aligned
;
228 /* Array of pointers to load-balanced QIDs sorted by priority level */
229 struct sw_qid
*qids_prioritized
[RTE_EVENT_MAX_QUEUES_PER_DEV
];
232 struct sw_point_stats stats __rte_cache_aligned
;
233 uint64_t sched_called
;
234 int32_t sched_quanta
;
235 uint64_t sched_no_iq_enqueues
;
236 uint64_t sched_no_cq_enqueues
;
237 uint64_t sched_cq_qid_called
;
240 uint32_t credit_update_quanta
;
242 /* store num stats and offset of the stats for each port */
243 uint16_t xstats_count_per_port
[SW_PORTS_MAX
];
244 uint16_t xstats_offset_for_port
[SW_PORTS_MAX
];
245 /* store num stats and offset of the stats for each queue */
246 uint16_t xstats_count_per_qid
[RTE_EVENT_MAX_QUEUES_PER_DEV
];
247 uint16_t xstats_offset_for_qid
[RTE_EVENT_MAX_QUEUES_PER_DEV
];
250 char service_name
[SW_PMD_NAME_MAX
];
253 static inline struct sw_evdev
*
254 sw_pmd_priv(const struct rte_eventdev
*eventdev
)
256 return eventdev
->data
->dev_private
;
259 static inline const struct sw_evdev
*
260 sw_pmd_priv_const(const struct rte_eventdev
*eventdev
)
262 return eventdev
->data
->dev_private
;
265 uint16_t sw_event_enqueue(void *port
, const struct rte_event
*ev
);
266 uint16_t sw_event_enqueue_burst(void *port
, const struct rte_event ev
[],
269 uint16_t sw_event_dequeue(void *port
, struct rte_event
*ev
, uint64_t wait
);
270 uint16_t sw_event_dequeue_burst(void *port
, struct rte_event
*ev
, uint16_t num
,
272 void sw_event_schedule(struct rte_eventdev
*dev
);
273 int sw_xstats_init(struct sw_evdev
*dev
);
274 int sw_xstats_uninit(struct sw_evdev
*dev
);
275 int sw_xstats_get_names(const struct rte_eventdev
*dev
,
276 enum rte_event_dev_xstats_mode mode
, uint8_t queue_port_id
,
277 struct rte_event_dev_xstats_name
*xstats_names
,
278 unsigned int *ids
, unsigned int size
);
279 int sw_xstats_get(const struct rte_eventdev
*dev
,
280 enum rte_event_dev_xstats_mode mode
, uint8_t queue_port_id
,
281 const unsigned int ids
[], uint64_t values
[], unsigned int n
);
282 uint64_t sw_xstats_get_by_name(const struct rte_eventdev
*dev
,
283 const char *name
, unsigned int *id
);
284 int sw_xstats_reset(struct rte_eventdev
*dev
,
285 enum rte_event_dev_xstats_mode mode
,
286 int16_t queue_port_id
,
287 const uint32_t ids
[],
290 int test_sw_eventdev(void);
292 #endif /* _SW_EVDEV_H_ */