ceph/src/spdk/dpdk/drivers/event/sw/sw_evdev.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2016-2017 Intel Corporation
   3  */
   4
   5 #ifndef _SW_EVDEV_H_
   6 #define _SW_EVDEV_H_
   7
   8 #include "sw_evdev_log.h"
   9 #include <rte_eventdev.h>
  10 #include <rte_eventdev_pmd_vdev.h>
  11 #include <rte_atomic.h>
  12
  13 #define SW_DEFAULT_CREDIT_QUANTA 32
  14 #define SW_DEFAULT_SCHED_QUANTA 128
  15 #define SW_QID_NUM_FIDS 16384
  16 #define SW_IQS_MAX 4
  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
  24
  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))
  28
  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
  33
  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 */
  36
  37 #define EVENTDEV_NAME_SW_PMD event_sw
  38 #define SW_PMD_NAME RTE_STR(event_sw)
  39 #define SW_PMD_NAME_MAX 64
  40
  41 #define SW_SCHED_TYPE_DIRECT (RTE_SCHED_TYPE_PARALLEL + 1)
  42
  43 #define SW_NUM_POLL_BUCKETS (MAX_SW_CONS_Q_DEPTH >> SW_DEQ_STAT_BUCKET_SHIFT)
  44
  45 enum {
  46         QE_FLAG_VALID_SHIFT = 0,
  47         QE_FLAG_COMPLETE_SHIFT,
  48         QE_FLAG_NOT_EOP_SHIFT,
  49         _QE_FLAG_COUNT
  50 };
  51
  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  */
  55
  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 */,
  60
  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
  64                  */
  65                 QE_FLAG_VALID | QE_FLAG_COMPLETE | QE_FLAG_NOT_EOP,
  66 };
  67
  68 /* Records basic event stats at a given point. Used in port and qid structs */
  69 struct sw_point_stats {
  70         uint64_t rx_pkts;
  71         uint64_t rx_dropped;
  72         uint64_t tx_pkts;
  73 };
  74
  75 /* structure used to track what port a flow (FID) is pinned to */
  76 struct sw_fid_t {
  77         /* which CQ this FID is currently pinned to */
  78         int32_t cq;
  79         /* number of packets gone to the CQ with this FID */
  80         uint32_t pcount;
  81 };
  82
  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];
  88 };
  89
  90 struct sw_iq {
  91         struct sw_queue_chunk *head;
  92         struct sw_queue_chunk *tail;
  93         uint16_t head_idx;
  94         uint16_t tail_idx;
  95         uint16_t count;
  96 };
  97
  98 struct sw_qid {
  99         /* set when the QID has been initialized */
 100         uint8_t initialized;
 101         /* The type of this QID */
 102         int8_t type;
 103         /* Integer ID representing the queue. This is used in history lists,
 104          * to identify the stage of processing.
 105          */
 106         uint32_t id;
 107         struct sw_point_stats stats;
 108
 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];
 113
 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];
 119
 120         /* Track flow ids for atomic load balancing */
 121         struct sw_fid_t fids[SW_QID_NUM_FIDS];
 122
 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 */
 128
 129         uint8_t priority;
 130 };
 131
 132 struct sw_hist_list_entry {
 133         int32_t qid;
 134         int32_t fid;
 135         struct reorder_buffer_entry *rob_entry;
 136 };
 137
 138 struct sw_evdev;
 139
 140 struct sw_port {
 141         /* new enqueue / dequeue API doesn't have an instance pointer, only the
 142          * pointer to the port being enqueue/dequeued from
 143          */
 144         struct sw_evdev *sw;
 145
 146         /* set when the port is initialized */
 147         uint8_t initialized;
 148         /* A numeric ID for the port */
 149         uint8_t id;
 150
 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.
 156          */
 157         uint8_t unlinks_in_progress;
 158
 159         int16_t is_directed; /** Takes from a single directed QID */
 160         /**
 161          * For loadbalanced we can optimise pulling packets from
 162          * producers if there is no reordering involved
 163          */
 164         int16_t num_ordered_qids;
 165
 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;
 170
 171         /* hole */
 172
 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 */
 178
 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 */
 186
 187         /* History list structs, containing info on pkts egressed to worker */
 188         uint16_t hist_head __rte_cache_aligned;
 189         uint16_t hist_tail;
 190         uint16_t inflights;
 191         struct sw_hist_list_entry hist_list[SW_PORT_HIST_LIST];
 192
 193         /* track packets in and out of this port */
 194         struct sw_point_stats stats;
 195
 196
 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];
 202
 203         uint8_t num_qids_mapped;
 204 };
 205
 206 struct sw_evdev {
 207         struct rte_eventdev_data *data;
 208
 209         uint32_t port_count;
 210         uint32_t qid_count;
 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;
 216
 217         /* Contains all ports - load balanced and directed */
 218         struct sw_port ports[SW_PORTS_MAX] __rte_cache_aligned;
 219
 220         rte_atomic32_t inflights __rte_cache_aligned;
 221
 222         /*
 223          * max events in this instance. Cached here for performance.
 224          * (also available in data->conf.nb_events_limit)
 225          */
 226         uint32_t nb_events_limit;
 227
 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;
 232
 233         /* Cache how many packets are in each cq */
 234         uint16_t cq_ring_space[SW_PORTS_MAX] __rte_cache_aligned;
 235
 236         /* Array of pointers to load-balanced QIDs sorted by priority level */
 237         struct sw_qid *qids_prioritized[RTE_EVENT_MAX_QUEUES_PER_DEV];
 238
 239         /* Stats */
 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;
 246
 247         uint8_t started;
 248         uint32_t credit_update_quanta;
 249
 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];
 256
 257         uint32_t service_id;
 258         char service_name[SW_PMD_NAME_MAX];
 259 };
 260
 261 static inline struct sw_evdev *
 262 sw_pmd_priv(const struct rte_eventdev *eventdev)
 263 {
 264         return eventdev->data->dev_private;
 265 }
 266
 267 static inline const struct sw_evdev *
 268 sw_pmd_priv_const(const struct rte_eventdev *eventdev)
 269 {
 270         return eventdev->data->dev_private;
 271 }
 272
 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[],
 275                 uint16_t num);
 276
 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,
 279                         uint64_t wait);
 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[],
 296                 uint32_t nb_ids);
 297
 298 int test_sw_eventdev(void);
 299
 300 #endif /* _SW_EVDEV_H_ */