ceph/src/seastar/dpdk/drivers/crypto/scheduler/scheduler_failover.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 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 <rte_cryptodev.h>
  34 #include <rte_malloc.h>
  35
  36 #include "rte_cryptodev_scheduler_operations.h"
  37 #include "scheduler_pmd_private.h"
  38
  39 #define PRIMARY_SLAVE_IDX       0
  40 #define SECONDARY_SLAVE_IDX     1
  41 #define NB_FAILOVER_SLAVES      2
  42 #define SLAVE_SWITCH_MASK       (0x01)
  43
  44 struct fo_scheduler_qp_ctx {
  45         struct scheduler_slave primary_slave;
  46         struct scheduler_slave secondary_slave;
  47
  48         uint8_t deq_idx;
  49 };
  50
  51 static inline uint16_t __attribute__((always_inline))
  52 failover_slave_enqueue(struct scheduler_slave *slave, uint8_t slave_idx,
  53                 struct rte_crypto_op **ops, uint16_t nb_ops)
  54 {
  55         uint16_t i, processed_ops;
  56         struct rte_cryptodev_sym_session *sessions[nb_ops];
  57         struct scheduler_session *sess0, *sess1, *sess2, *sess3;
  58
  59         for (i = 0; i < nb_ops && i < 4; i++)
  60                 rte_prefetch0(ops[i]->sym->session);
  61
  62         for (i = 0; (i < (nb_ops - 8)) && (nb_ops > 8); i += 4) {
  63                 rte_prefetch0(ops[i + 4]->sym->session);
  64                 rte_prefetch0(ops[i + 5]->sym->session);
  65                 rte_prefetch0(ops[i + 6]->sym->session);
  66                 rte_prefetch0(ops[i + 7]->sym->session);
  67
  68                 sess0 = (struct scheduler_session *)
  69                                 ops[i]->sym->session->_private;
  70                 sess1 = (struct scheduler_session *)
  71                                 ops[i+1]->sym->session->_private;
  72                 sess2 = (struct scheduler_session *)
  73                                 ops[i+2]->sym->session->_private;
  74                 sess3 = (struct scheduler_session *)
  75                                 ops[i+3]->sym->session->_private;
  76
  77                 sessions[i] = ops[i]->sym->session;
  78                 sessions[i + 1] = ops[i + 1]->sym->session;
  79                 sessions[i + 2] = ops[i + 2]->sym->session;
  80                 sessions[i + 3] = ops[i + 3]->sym->session;
  81
  82                 ops[i]->sym->session = sess0->sessions[slave_idx];
  83                 ops[i + 1]->sym->session = sess1->sessions[slave_idx];
  84                 ops[i + 2]->sym->session = sess2->sessions[slave_idx];
  85                 ops[i + 3]->sym->session = sess3->sessions[slave_idx];
  86         }
  87
  88         for (; i < nb_ops; i++) {
  89                 sess0 = (struct scheduler_session *)
  90                                 ops[i]->sym->session->_private;
  91                 sessions[i] = ops[i]->sym->session;
  92                 ops[i]->sym->session = sess0->sessions[slave_idx];
  93         }
  94
  95         processed_ops = rte_cryptodev_enqueue_burst(slave->dev_id,
  96                         slave->qp_id, ops, nb_ops);
  97         slave->nb_inflight_cops += processed_ops;
  98
  99         if (unlikely(processed_ops < nb_ops))
 100                 for (i = processed_ops; i < nb_ops; i++)
 101                         ops[i]->sym->session = sessions[i];
 102
 103         return processed_ops;
 104 }
 105
 106 static uint16_t
 107 schedule_enqueue(void *qp, struct rte_crypto_op **ops, uint16_t nb_ops)
 108 {
 109         struct fo_scheduler_qp_ctx *qp_ctx =
 110                         ((struct scheduler_qp_ctx *)qp)->private_qp_ctx;
 111         uint16_t enqueued_ops;
 112
 113         if (unlikely(nb_ops == 0))
 114                 return 0;
 115
 116         enqueued_ops = failover_slave_enqueue(&qp_ctx->primary_slave,
 117                         PRIMARY_SLAVE_IDX, ops, nb_ops);
 118
 119         if (enqueued_ops < nb_ops)
 120                 enqueued_ops += failover_slave_enqueue(&qp_ctx->secondary_slave,
 121                                 SECONDARY_SLAVE_IDX, &ops[enqueued_ops],
 122                                 nb_ops - enqueued_ops);
 123
 124         return enqueued_ops;
 125 }
 126
 127
 128 static uint16_t
 129 schedule_enqueue_ordering(void *qp, struct rte_crypto_op **ops,
 130                 uint16_t nb_ops)
 131 {
 132         struct rte_ring *order_ring =
 133                         ((struct scheduler_qp_ctx *)qp)->order_ring;
 134         uint16_t nb_ops_to_enq = get_max_enqueue_order_count(order_ring,
 135                         nb_ops);
 136         uint16_t nb_ops_enqd = schedule_enqueue(qp, ops,
 137                         nb_ops_to_enq);
 138
 139         scheduler_order_insert(order_ring, ops, nb_ops_enqd);
 140
 141         return nb_ops_enqd;
 142 }
 143
 144 static uint16_t
 145 schedule_dequeue(void *qp, struct rte_crypto_op **ops, uint16_t nb_ops)
 146 {
 147         struct fo_scheduler_qp_ctx *qp_ctx =
 148                         ((struct scheduler_qp_ctx *)qp)->private_qp_ctx;
 149         struct scheduler_slave *slaves[NB_FAILOVER_SLAVES] = {
 150                         &qp_ctx->primary_slave, &qp_ctx->secondary_slave};
 151         struct scheduler_slave *slave = slaves[qp_ctx->deq_idx];
 152         uint16_t nb_deq_ops = 0, nb_deq_ops2 = 0;
 153
 154         if (slave->nb_inflight_cops) {
 155                 nb_deq_ops = rte_cryptodev_dequeue_burst(slave->dev_id,
 156                         slave->qp_id, ops, nb_ops);
 157                 slave->nb_inflight_cops -= nb_deq_ops;
 158         }
 159
 160         qp_ctx->deq_idx = (~qp_ctx->deq_idx) & SLAVE_SWITCH_MASK;
 161
 162         if (nb_deq_ops == nb_ops)
 163                 return nb_deq_ops;
 164
 165         slave = slaves[qp_ctx->deq_idx];
 166
 167         if (slave->nb_inflight_cops) {
 168                 nb_deq_ops2 = rte_cryptodev_dequeue_burst(slave->dev_id,
 169                         slave->qp_id, &ops[nb_deq_ops], nb_ops - nb_deq_ops);
 170                 slave->nb_inflight_cops -= nb_deq_ops2;
 171         }
 172
 173         return nb_deq_ops + nb_deq_ops2;
 174 }
 175
 176 static uint16_t
 177 schedule_dequeue_ordering(void *qp, struct rte_crypto_op **ops,
 178                 uint16_t nb_ops)
 179 {
 180         struct rte_ring *order_ring =
 181                         ((struct scheduler_qp_ctx *)qp)->order_ring;
 182
 183         schedule_dequeue(qp, ops, nb_ops);
 184
 185         return scheduler_order_drain(order_ring, ops, nb_ops);
 186 }
 187
 188 static int
 189 slave_attach(__rte_unused struct rte_cryptodev *dev,
 190                 __rte_unused uint8_t slave_id)
 191 {
 192         return 0;
 193 }
 194
 195 static int
 196 slave_detach(__rte_unused struct rte_cryptodev *dev,
 197                 __rte_unused uint8_t slave_id)
 198 {
 199         return 0;
 200 }
 201
 202 static int
 203 scheduler_start(struct rte_cryptodev *dev)
 204 {
 205         struct scheduler_ctx *sched_ctx = dev->data->dev_private;
 206         uint16_t i;
 207
 208         if (sched_ctx->nb_slaves < 2) {
 209                 CS_LOG_ERR("Number of slaves shall no less than 2");
 210                 return -ENOMEM;
 211         }
 212
 213         if (sched_ctx->reordering_enabled) {
 214                 dev->enqueue_burst = schedule_enqueue_ordering;
 215                 dev->dequeue_burst = schedule_dequeue_ordering;
 216         } else {
 217                 dev->enqueue_burst = schedule_enqueue;
 218                 dev->dequeue_burst = schedule_dequeue;
 219         }
 220
 221         for (i = 0; i < dev->data->nb_queue_pairs; i++) {
 222                 struct fo_scheduler_qp_ctx *qp_ctx =
 223                         ((struct scheduler_qp_ctx *)
 224                                 dev->data->queue_pairs[i])->private_qp_ctx;
 225
 226                 rte_memcpy(&qp_ctx->primary_slave,
 227                                 &sched_ctx->slaves[PRIMARY_SLAVE_IDX],
 228                                 sizeof(struct scheduler_slave));
 229                 rte_memcpy(&qp_ctx->secondary_slave,
 230                                 &sched_ctx->slaves[SECONDARY_SLAVE_IDX],
 231                                 sizeof(struct scheduler_slave));
 232         }
 233
 234         return 0;
 235 }
 236
 237 static int
 238 scheduler_stop(__rte_unused struct rte_cryptodev *dev)
 239 {
 240         return 0;
 241 }
 242
 243 static int
 244 scheduler_config_qp(struct rte_cryptodev *dev, uint16_t qp_id)
 245 {
 246         struct scheduler_qp_ctx *qp_ctx = dev->data->queue_pairs[qp_id];
 247         struct fo_scheduler_qp_ctx *fo_qp_ctx;
 248
 249         fo_qp_ctx = rte_zmalloc_socket(NULL, sizeof(*fo_qp_ctx), 0,
 250                         rte_socket_id());
 251         if (!fo_qp_ctx) {
 252                 CS_LOG_ERR("failed allocate memory for private queue pair");
 253                 return -ENOMEM;
 254         }
 255
 256         qp_ctx->private_qp_ctx = (void *)fo_qp_ctx;
 257
 258         return 0;
 259 }
 260
 261 static int
 262 scheduler_create_private_ctx(__rte_unused struct rte_cryptodev *dev)
 263 {
 264         return 0;
 265 }
 266
 267 struct rte_cryptodev_scheduler_ops scheduler_fo_ops = {
 268         slave_attach,
 269         slave_detach,
 270         scheduler_start,
 271         scheduler_stop,
 272         scheduler_config_qp,
 273         scheduler_create_private_ctx,
 274         NULL,   /* option_set */
 275         NULL    /*option_get */
 276 };
 277
 278 struct rte_cryptodev_scheduler fo_scheduler = {
 279                 .name = "failover-scheduler",
 280                 .description = "scheduler which enqueues to the primary slave, "
 281                                 "and only then enqueues to the secondary slave "
 282                                 "upon failing on enqueuing to primary",
 283                 .mode = CDEV_SCHED_MODE_FAILOVER,
 284                 .ops = &scheduler_fo_ops
 285 };
 286
 287 struct rte_cryptodev_scheduler *failover_scheduler = &fo_scheduler;