drivers/event/sw/sw_evdev.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2016-2017 Intel Corporation. All rights reserved.
   5  *
   6  *   Redistribution and use in source and binary forms, with or without
   7  *   modification, are permitted provided that the following conditions
   8  *   are met:
   9  *
  10  *     * Redistributions of source code must retain the above copyright
  11  *       notice, this list of conditions and the following disclaimer.
  12  *     * Redistributions in binary form must reproduce the above copyright
  13  *       notice, this list of conditions and the following disclaimer in
  14  *       the documentation and/or other materials provided with the
  15  *       distribution.
  16  *     * Neither the name of Intel Corporation nor the names of its
  17  *       contributors may be used to endorse or promote products derived
  18  *       from this software without specific prior written permission.
  19  *
  20  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <string.h>
  34
  35 #include <rte_vdev.h>
  36 #include <rte_memzone.h>
  37 #include <rte_kvargs.h>
  38 #include <rte_ring.h>
  39
  40 #include "sw_evdev.h"
  41
  42 #define EVENTDEV_NAME_SW_PMD event_sw
  43 #define NUMA_NODE_ARG "numa_node"
  44 #define SCHED_QUANTA_ARG "sched_quanta"
  45 #define CREDIT_QUANTA_ARG "credit_quanta"
  46
  47 static void
  48 sw_queue_def_conf(struct rte_eventdev *dev, uint8_t queue_id,
  49                                  struct rte_event_queue_conf *conf)
  50 {
  51         RTE_SET_USED(dev);
  52         RTE_SET_USED(queue_id);
  53
  54         static const struct rte_event_queue_conf default_conf = {
  55                 .nb_atomic_flows = 4096,
  56                 .nb_atomic_order_sequences = 1,
  57                 .event_queue_cfg = RTE_EVENT_QUEUE_CFG_ATOMIC_ONLY,
  58                 .priority = RTE_EVENT_DEV_PRIORITY_NORMAL,
  59         };
  60
  61         *conf = default_conf;
  62 }
  63
  64 static void
  65 sw_port_def_conf(struct rte_eventdev *dev, uint8_t port_id,
  66                  struct rte_event_port_conf *port_conf)
  67 {
  68         RTE_SET_USED(dev);
  69         RTE_SET_USED(port_id);
  70
  71         port_conf->new_event_threshold = 1024;
  72         port_conf->dequeue_depth = 16;
  73         port_conf->enqueue_depth = 16;
  74 }
  75
  76 static int
  77 sw_dev_configure(const struct rte_eventdev *dev)
  78 {
  79         struct sw_evdev *sw = sw_pmd_priv(dev);
  80         const struct rte_eventdev_data *data = dev->data;
  81         const struct rte_event_dev_config *conf = &data->dev_conf;
  82
  83         sw->qid_count = conf->nb_event_queues;
  84         sw->port_count = conf->nb_event_ports;
  85         sw->nb_events_limit = conf->nb_events_limit;
  86
  87         if (conf->event_dev_cfg & RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT)
  88                 return -ENOTSUP;
  89
  90         return 0;
  91 }
  92
  93 static void
  94 sw_info_get(struct rte_eventdev *dev, struct rte_event_dev_info *info)
  95 {
  96         RTE_SET_USED(dev);
  97
  98         static const struct rte_event_dev_info evdev_sw_info = {
  99                         .driver_name = SW_PMD_NAME,
 100                         .max_event_queues = RTE_EVENT_MAX_QUEUES_PER_DEV,
 101                         .max_event_queue_flows = SW_QID_NUM_FIDS,
 102                         .max_event_queue_priority_levels = SW_Q_PRIORITY_MAX,
 103                         .max_event_priority_levels = SW_IQS_MAX,
 104                         .max_event_ports = SW_PORTS_MAX,
 105                         .max_event_port_dequeue_depth = MAX_SW_CONS_Q_DEPTH,
 106                         .max_event_port_enqueue_depth = MAX_SW_PROD_Q_DEPTH,
 107                         .max_num_events = SW_INFLIGHT_EVENTS_TOTAL,
 108                         .event_dev_cap = (RTE_EVENT_DEV_CAP_QUEUE_QOS |
 109                                         RTE_EVENT_DEV_CAP_EVENT_QOS),
 110         };
 111
 112         *info = evdev_sw_info;
 113 }
 114
 115 static int
 116 assign_numa_node(const char *key __rte_unused, const char *value, void *opaque)
 117 {
 118         int *socket_id = opaque;
 119         *socket_id = atoi(value);
 120         if (*socket_id >= RTE_MAX_NUMA_NODES)
 121                 return -1;
 122         return 0;
 123 }
 124
 125 static int
 126 set_sched_quanta(const char *key __rte_unused, const char *value, void *opaque)
 127 {
 128         int *quanta = opaque;
 129         *quanta = atoi(value);
 130         if (*quanta < 0 || *quanta >= 4096)
 131                 return -1;
 132         return 0;
 133 }
 134
 135 static int
 136 set_credit_quanta(const char *key __rte_unused, const char *value, void *opaque)
 137 {
 138         int *credit = opaque;
 139         *credit = atoi(value);
 140         if (*credit < 0 || *credit >= 128)
 141                 return -1;
 142         return 0;
 143 }
 144
 145 static int
 146 sw_probe(const char *name, const char *params)
 147 {
 148         static const struct rte_eventdev_ops evdev_sw_ops = {
 149                         .dev_configure = sw_dev_configure,
 150                         .dev_infos_get = sw_info_get,
 151
 152                         .queue_def_conf = sw_queue_def_conf,
 153                         .port_def_conf = sw_port_def_conf,
 154         };
 155
 156         static const char *const args[] = {
 157                 NUMA_NODE_ARG,
 158                 SCHED_QUANTA_ARG,
 159                 CREDIT_QUANTA_ARG,
 160                 NULL
 161         };
 162         struct rte_eventdev *dev;
 163         struct sw_evdev *sw;
 164         int socket_id = rte_socket_id();
 165         int sched_quanta  = SW_DEFAULT_SCHED_QUANTA;
 166         int credit_quanta = SW_DEFAULT_CREDIT_QUANTA;
 167
 168         if (params != NULL && params[0] != '\0') {
 169                 struct rte_kvargs *kvlist = rte_kvargs_parse(params, args);
 170
 171                 if (!kvlist) {
 172                         SW_LOG_INFO(
 173                                 "Ignoring unsupported parameters when creating device '%s'\n",
 174                                 name);
 175                 } else {
 176                         int ret = rte_kvargs_process(kvlist, NUMA_NODE_ARG,
 177                                         assign_numa_node, &socket_id);
 178                         if (ret != 0) {
 179                                 SW_LOG_ERR(
 180                                         "%s: Error parsing numa node parameter",
 181                                         name);
 182                                 rte_kvargs_free(kvlist);
 183                                 return ret;
 184                         }
 185
 186                         ret = rte_kvargs_process(kvlist, SCHED_QUANTA_ARG,
 187                                         set_sched_quanta, &sched_quanta);
 188                         if (ret != 0) {
 189                                 SW_LOG_ERR(
 190                                         "%s: Error parsing sched quanta parameter",
 191                                         name);
 192                                 rte_kvargs_free(kvlist);
 193                                 return ret;
 194                         }
 195
 196                         ret = rte_kvargs_process(kvlist, CREDIT_QUANTA_ARG,
 197                                         set_credit_quanta, &credit_quanta);
 198                         if (ret != 0) {
 199                                 SW_LOG_ERR(
 200                                         "%s: Error parsing credit quanta parameter",
 201                                         name);
 202                                 rte_kvargs_free(kvlist);
 203                                 return ret;
 204                         }
 205
 206                         rte_kvargs_free(kvlist);
 207                 }
 208         }
 209
 210         SW_LOG_INFO(
 211                         "Creating eventdev sw device %s, numa_node=%d, sched_quanta=%d, credit_quanta=%d\n",
 212                         name, socket_id, sched_quanta, credit_quanta);
 213
 214         dev = rte_event_pmd_vdev_init(name,
 215                         sizeof(struct sw_evdev), socket_id);
 216         if (dev == NULL) {
 217                 SW_LOG_ERR("eventdev vdev init() failed");
 218                 return -EFAULT;
 219         }
 220         dev->dev_ops = &evdev_sw_ops;
 221
 222         sw = dev->data->dev_private;
 223         sw->data = dev->data;
 224
 225         /* copy values passed from vdev command line to instance */
 226         sw->credit_update_quanta = credit_quanta;
 227         sw->sched_quanta = sched_quanta;
 228
 229         return 0;
 230 }
 231
 232 static int
 233 sw_remove(const char *name)
 234 {
 235         if (name == NULL)
 236                 return -EINVAL;
 237
 238         SW_LOG_INFO("Closing eventdev sw device %s\n", name);
 239
 240         return rte_event_pmd_vdev_uninit(name);
 241 }
 242
 243 static struct rte_vdev_driver evdev_sw_pmd_drv = {
 244         .probe = sw_probe,
 245         .remove = sw_remove
 246 };
 247
 248 RTE_PMD_REGISTER_VDEV(EVENTDEV_NAME_SW_PMD, evdev_sw_pmd_drv);
 249 RTE_PMD_REGISTER_PARAM_STRING(event_sw, NUMA_NODE_ARG "=<int> "
 250                 SCHED_QUANTA_ARG "=<int>" CREDIT_QUANTA_ARG "=<int>");