--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2017 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <rte_cryptodev.h>
+#include <rte_malloc.h>
+
+#include "rte_cryptodev_scheduler_operations.h"
+#include "scheduler_pmd_private.h"
+
+#define PRIMARY_SLAVE_IDX 0
+#define SECONDARY_SLAVE_IDX 1
+#define NB_FAILOVER_SLAVES 2
+#define SLAVE_SWITCH_MASK (0x01)
+
+struct fo_scheduler_qp_ctx {
+ struct scheduler_slave primary_slave;
+ struct scheduler_slave secondary_slave;
+
+ uint8_t deq_idx;
+};
+
+static inline uint16_t __attribute__((always_inline))
+failover_slave_enqueue(struct scheduler_slave *slave, uint8_t slave_idx,
+ struct rte_crypto_op **ops, uint16_t nb_ops)
+{
+ uint16_t i, processed_ops;
+ struct rte_cryptodev_sym_session *sessions[nb_ops];
+ struct scheduler_session *sess0, *sess1, *sess2, *sess3;
+
+ for (i = 0; i < nb_ops && i < 4; i++)
+ rte_prefetch0(ops[i]->sym->session);
+
+ for (i = 0; (i < (nb_ops - 8)) && (nb_ops > 8); i += 4) {
+ rte_prefetch0(ops[i + 4]->sym->session);
+ rte_prefetch0(ops[i + 5]->sym->session);
+ rte_prefetch0(ops[i + 6]->sym->session);
+ rte_prefetch0(ops[i + 7]->sym->session);
+
+ sess0 = (struct scheduler_session *)
+ ops[i]->sym->session->_private;
+ sess1 = (struct scheduler_session *)
+ ops[i+1]->sym->session->_private;
+ sess2 = (struct scheduler_session *)
+ ops[i+2]->sym->session->_private;
+ sess3 = (struct scheduler_session *)
+ ops[i+3]->sym->session->_private;
+
+ sessions[i] = ops[i]->sym->session;
+ sessions[i + 1] = ops[i + 1]->sym->session;
+ sessions[i + 2] = ops[i + 2]->sym->session;
+ sessions[i + 3] = ops[i + 3]->sym->session;
+
+ ops[i]->sym->session = sess0->sessions[slave_idx];
+ ops[i + 1]->sym->session = sess1->sessions[slave_idx];
+ ops[i + 2]->sym->session = sess2->sessions[slave_idx];
+ ops[i + 3]->sym->session = sess3->sessions[slave_idx];
+ }
+
+ for (; i < nb_ops; i++) {
+ sess0 = (struct scheduler_session *)
+ ops[i]->sym->session->_private;
+ sessions[i] = ops[i]->sym->session;
+ ops[i]->sym->session = sess0->sessions[slave_idx];
+ }
+
+ processed_ops = rte_cryptodev_enqueue_burst(slave->dev_id,
+ slave->qp_id, ops, nb_ops);
+ slave->nb_inflight_cops += processed_ops;
+
+ if (unlikely(processed_ops < nb_ops))
+ for (i = processed_ops; i < nb_ops; i++)
+ ops[i]->sym->session = sessions[i];
+
+ return processed_ops;
+}
+
+static uint16_t
+schedule_enqueue(void *qp, struct rte_crypto_op **ops, uint16_t nb_ops)
+{
+ struct fo_scheduler_qp_ctx *qp_ctx =
+ ((struct scheduler_qp_ctx *)qp)->private_qp_ctx;
+ uint16_t enqueued_ops;
+
+ if (unlikely(nb_ops == 0))
+ return 0;
+
+ enqueued_ops = failover_slave_enqueue(&qp_ctx->primary_slave,
+ PRIMARY_SLAVE_IDX, ops, nb_ops);
+
+ if (enqueued_ops < nb_ops)
+ enqueued_ops += failover_slave_enqueue(&qp_ctx->secondary_slave,
+ SECONDARY_SLAVE_IDX, &ops[enqueued_ops],
+ nb_ops - enqueued_ops);
+
+ return enqueued_ops;
+}
+
+
+static uint16_t
+schedule_enqueue_ordering(void *qp, struct rte_crypto_op **ops,
+ uint16_t nb_ops)
+{
+ struct rte_ring *order_ring =
+ ((struct scheduler_qp_ctx *)qp)->order_ring;
+ uint16_t nb_ops_to_enq = get_max_enqueue_order_count(order_ring,
+ nb_ops);
+ uint16_t nb_ops_enqd = schedule_enqueue(qp, ops,
+ nb_ops_to_enq);
+
+ scheduler_order_insert(order_ring, ops, nb_ops_enqd);
+
+ return nb_ops_enqd;
+}
+
+static uint16_t
+schedule_dequeue(void *qp, struct rte_crypto_op **ops, uint16_t nb_ops)
+{
+ struct fo_scheduler_qp_ctx *qp_ctx =
+ ((struct scheduler_qp_ctx *)qp)->private_qp_ctx;
+ struct scheduler_slave *slaves[NB_FAILOVER_SLAVES] = {
+ &qp_ctx->primary_slave, &qp_ctx->secondary_slave};
+ struct scheduler_slave *slave = slaves[qp_ctx->deq_idx];
+ uint16_t nb_deq_ops = 0, nb_deq_ops2 = 0;
+
+ if (slave->nb_inflight_cops) {
+ nb_deq_ops = rte_cryptodev_dequeue_burst(slave->dev_id,
+ slave->qp_id, ops, nb_ops);
+ slave->nb_inflight_cops -= nb_deq_ops;
+ }
+
+ qp_ctx->deq_idx = (~qp_ctx->deq_idx) & SLAVE_SWITCH_MASK;
+
+ if (nb_deq_ops == nb_ops)
+ return nb_deq_ops;
+
+ slave = slaves[qp_ctx->deq_idx];
+
+ if (slave->nb_inflight_cops) {
+ nb_deq_ops2 = rte_cryptodev_dequeue_burst(slave->dev_id,
+ slave->qp_id, &ops[nb_deq_ops], nb_ops - nb_deq_ops);
+ slave->nb_inflight_cops -= nb_deq_ops2;
+ }
+
+ return nb_deq_ops + nb_deq_ops2;
+}
+
+static uint16_t
+schedule_dequeue_ordering(void *qp, struct rte_crypto_op **ops,
+ uint16_t nb_ops)
+{
+ struct rte_ring *order_ring =
+ ((struct scheduler_qp_ctx *)qp)->order_ring;
+
+ schedule_dequeue(qp, ops, nb_ops);
+
+ return scheduler_order_drain(order_ring, ops, nb_ops);
+}
+
+static int
+slave_attach(__rte_unused struct rte_cryptodev *dev,
+ __rte_unused uint8_t slave_id)
+{
+ return 0;
+}
+
+static int
+slave_detach(__rte_unused struct rte_cryptodev *dev,
+ __rte_unused uint8_t slave_id)
+{
+ return 0;
+}
+
+static int
+scheduler_start(struct rte_cryptodev *dev)
+{
+ struct scheduler_ctx *sched_ctx = dev->data->dev_private;
+ uint16_t i;
+
+ if (sched_ctx->nb_slaves < 2) {
+ CS_LOG_ERR("Number of slaves shall no less than 2");
+ return -ENOMEM;
+ }
+
+ if (sched_ctx->reordering_enabled) {
+ dev->enqueue_burst = schedule_enqueue_ordering;
+ dev->dequeue_burst = schedule_dequeue_ordering;
+ } else {
+ dev->enqueue_burst = schedule_enqueue;
+ dev->dequeue_burst = schedule_dequeue;
+ }
+
+ for (i = 0; i < dev->data->nb_queue_pairs; i++) {
+ struct fo_scheduler_qp_ctx *qp_ctx =
+ ((struct scheduler_qp_ctx *)
+ dev->data->queue_pairs[i])->private_qp_ctx;
+
+ rte_memcpy(&qp_ctx->primary_slave,
+ &sched_ctx->slaves[PRIMARY_SLAVE_IDX],
+ sizeof(struct scheduler_slave));
+ rte_memcpy(&qp_ctx->secondary_slave,
+ &sched_ctx->slaves[SECONDARY_SLAVE_IDX],
+ sizeof(struct scheduler_slave));
+ }
+
+ return 0;
+}
+
+static int
+scheduler_stop(__rte_unused struct rte_cryptodev *dev)
+{
+ return 0;
+}
+
+static int
+scheduler_config_qp(struct rte_cryptodev *dev, uint16_t qp_id)
+{
+ struct scheduler_qp_ctx *qp_ctx = dev->data->queue_pairs[qp_id];
+ struct fo_scheduler_qp_ctx *fo_qp_ctx;
+
+ fo_qp_ctx = rte_zmalloc_socket(NULL, sizeof(*fo_qp_ctx), 0,
+ rte_socket_id());
+ if (!fo_qp_ctx) {
+ CS_LOG_ERR("failed allocate memory for private queue pair");
+ return -ENOMEM;
+ }
+
+ qp_ctx->private_qp_ctx = (void *)fo_qp_ctx;
+
+ return 0;
+}
+
+static int
+scheduler_create_private_ctx(__rte_unused struct rte_cryptodev *dev)
+{
+ return 0;
+}
+
+struct rte_cryptodev_scheduler_ops scheduler_fo_ops = {
+ slave_attach,
+ slave_detach,
+ scheduler_start,
+ scheduler_stop,
+ scheduler_config_qp,
+ scheduler_create_private_ctx,
+ NULL, /* option_set */
+ NULL /*option_get */
+};
+
+struct rte_cryptodev_scheduler fo_scheduler = {
+ .name = "failover-scheduler",
+ .description = "scheduler which enqueues to the primary slave, "
+ "and only then enqueues to the secondary slave "
+ "upon failing on enqueuing to primary",
+ .mode = CDEV_SCHED_MODE_FAILOVER,
+ .ops = &scheduler_fo_ops
+};
+
+struct rte_cryptodev_scheduler *failover_scheduler = &fo_scheduler;
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