Imported Upstream version 17.05

Change-Id: Id1e419c5a214e4a18739663b91f0f9a549f1fdc6
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>

1 files changed, 281 insertions, 0 deletions

diff --git a/drivers/crypto/scheduler/scheduler_roundrobin.c b/drivers/crypto/scheduler/scheduler_roundrobin.c
new file mode 100644
index 00000000..01162764
--- /dev/null
+++ b/drivers/crypto/scheduler/scheduler_roundrobin.c
@@ -0,0 +1,281 @@
+/*-
+ *   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"
+
+struct rr_scheduler_qp_ctx {
+	struct scheduler_slave slaves[RTE_CRYPTODEV_SCHEDULER_MAX_NB_SLAVES];
+	uint32_t nb_slaves;
+
+	uint32_t last_enq_slave_idx;
+	uint32_t last_deq_slave_idx;
+};
+
+static uint16_t
+schedule_enqueue(void *qp, struct rte_crypto_op **ops, uint16_t nb_ops)
+{
+	struct rr_scheduler_qp_ctx *rr_qp_ctx =
+			((struct scheduler_qp_ctx *)qp)->private_qp_ctx;
+	uint32_t slave_idx = rr_qp_ctx->last_enq_slave_idx;
+	struct scheduler_slave *slave = &rr_qp_ctx->slaves[slave_idx];
+	uint16_t i, processed_ops;
+	struct rte_cryptodev_sym_session *sessions[nb_ops];
+	struct scheduler_session *sess0, *sess1, *sess2, *sess3;
+
+	if (unlikely(nb_ops == 0))
+		return 0;
+
+	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) {
+		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];
+
+		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);
+	}
+
+	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;
+
+	rr_qp_ctx->last_enq_slave_idx += 1;
+	rr_qp_ctx->last_enq_slave_idx %= rr_qp_ctx->nb_slaves;
+
+	/* recover session if enqueue is failed */
+	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_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 rr_scheduler_qp_ctx *rr_qp_ctx =
+			((struct scheduler_qp_ctx *)qp)->private_qp_ctx;
+	struct scheduler_slave *slave;
+	uint32_t last_slave_idx = rr_qp_ctx->last_deq_slave_idx;
+	uint16_t nb_deq_ops;
+
+	if (unlikely(rr_qp_ctx->slaves[last_slave_idx].nb_inflight_cops == 0)) {
+		do {
+			last_slave_idx += 1;
+
+			if (unlikely(last_slave_idx >= rr_qp_ctx->nb_slaves))
+				last_slave_idx = 0;
+			/* looped back, means no inflight cops in the queue */
+			if (last_slave_idx == rr_qp_ctx->last_deq_slave_idx)
+				return 0;
+		} while (rr_qp_ctx->slaves[last_slave_idx].nb_inflight_cops
+				== 0);
+	}
+
+	slave = &rr_qp_ctx->slaves[last_slave_idx];
+
+	nb_deq_ops = rte_cryptodev_dequeue_burst(slave->dev_id,
+			slave->qp_id, ops, nb_ops);
+
+	last_slave_idx += 1;
+	last_slave_idx %= rr_qp_ctx->nb_slaves;
+
+	rr_qp_ctx->last_deq_slave_idx = last_slave_idx;
+
+	slave->nb_inflight_cops -= nb_deq_ops;
+
+	return nb_deq_ops;
+}
+
+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->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 scheduler_qp_ctx *qp_ctx = dev->data->queue_pairs[i];
+		struct rr_scheduler_qp_ctx *rr_qp_ctx =
+				qp_ctx->private_qp_ctx;
+		uint32_t j;
+
+		memset(rr_qp_ctx->slaves, 0,
+				RTE_CRYPTODEV_SCHEDULER_MAX_NB_SLAVES *
+				sizeof(struct scheduler_slave));
+		for (j = 0; j < sched_ctx->nb_slaves; j++) {
+			rr_qp_ctx->slaves[j].dev_id =
+					sched_ctx->slaves[j].dev_id;
+			rr_qp_ctx->slaves[j].qp_id = i;
+		}
+
+		rr_qp_ctx->nb_slaves = sched_ctx->nb_slaves;
+
+		rr_qp_ctx->last_enq_slave_idx = 0;
+		rr_qp_ctx->last_deq_slave_idx = 0;
+	}
+
+	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 rr_scheduler_qp_ctx *rr_qp_ctx;
+
+	rr_qp_ctx = rte_zmalloc_socket(NULL, sizeof(*rr_qp_ctx), 0,
+			rte_socket_id());
+	if (!rr_qp_ctx) {
+		CS_LOG_ERR("failed allocate memory for private queue pair");
+		return -ENOMEM;
+	}
+
+	qp_ctx->private_qp_ctx = (void *)rr_qp_ctx;
+
+	return 0;
+}
+
+static int
+scheduler_create_private_ctx(__rte_unused struct rte_cryptodev *dev)
+{
+	return 0;
+}
+
+struct rte_cryptodev_scheduler_ops scheduler_rr_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 scheduler = {
+		.name = "roundrobin-scheduler",
+		.description = "scheduler which will round robin burst across "
+				"slave crypto devices",
+		.mode = CDEV_SCHED_MODE_ROUNDROBIN,
+		.ops = &scheduler_rr_ops
+};
+
+struct rte_cryptodev_scheduler *roundrobin_scheduler = &scheduler;