[dpdk-dev] [PATCH v3 03/10] event/dsw: add DSW port configuration

["Mattias Rönnblom" <mattias.ronnblom@ericsson.com>]

Allow port setup and release in the DSW event device.

Signed-off-by: Mattias Rönnblom <mattias.ronnblom@ericsson.com>
---
 drivers/event/dsw/dsw_evdev.c | 60 +++++++++++++++++++++++++++++++++++
 drivers/event/dsw/dsw_evdev.h | 28 ++++++++++++++++
 2 files changed, 88 insertions(+)

diff --git a/drivers/event/dsw/dsw_evdev.c b/drivers/event/dsw/dsw_evdev.c
index 1500d2426..91b1a2449 100644
--- a/drivers/event/dsw/dsw_evdev.c
+++ b/drivers/event/dsw/dsw_evdev.c
@@ -9,6 +9,62 @@
 
 #define EVENTDEV_NAME_DSW_PMD event_dsw
 
+static int
+dsw_port_setup(struct rte_eventdev *dev, uint8_t port_id,
+	       const struct rte_event_port_conf *conf)
+{
+	struct dsw_evdev *dsw = dsw_pmd_priv(dev);
+	struct dsw_port *port;
+	struct rte_event_ring *in_ring;
+	char ring_name[RTE_RING_NAMESIZE];
+
+	port = &dsw->ports[port_id];
+
+	*port = (struct dsw_port) {
+		.id = port_id,
+		.dsw = dsw,
+		.dequeue_depth = conf->dequeue_depth,
+		.enqueue_depth = conf->enqueue_depth,
+		.new_event_threshold = conf->new_event_threshold
+	};
+
+	snprintf(ring_name, sizeof(ring_name), "dsw%d_p%u", dev->data->dev_id,
+		 port_id);
+
+	in_ring = rte_event_ring_create(ring_name, DSW_IN_RING_SIZE,
+					dev->data->socket_id,
+					RING_F_SC_DEQ|RING_F_EXACT_SZ);
+
+	if (in_ring == NULL)
+		return -ENOMEM;
+
+	port->in_ring = in_ring;
+
+	dev->data->ports[port_id] = port;
+
+	return 0;
+}
+
+static void
+dsw_port_def_conf(struct rte_eventdev *dev __rte_unused,
+		  uint8_t port_id __rte_unused,
+		  struct rte_event_port_conf *port_conf)
+{
+	*port_conf = (struct rte_event_port_conf) {
+		.new_event_threshold = 1024,
+		.dequeue_depth = DSW_MAX_PORT_DEQUEUE_DEPTH / 4,
+		.enqueue_depth = DSW_MAX_PORT_ENQUEUE_DEPTH / 4
+	};
+}
+
+static void
+dsw_port_release(void *p)
+{
+	struct dsw_port *port = p;
+
+	rte_event_ring_free(port->in_ring);
+}
+
 static int
 dsw_queue_setup(struct rte_eventdev *dev, uint8_t queue_id,
 		const struct rte_event_queue_conf *conf)
@@ -81,12 +137,16 @@ dsw_configure(const struct rte_eventdev *dev)
 	struct dsw_evdev *dsw = dsw_pmd_priv(dev);
 	const struct rte_event_dev_config *conf = &dev->data->dev_conf;
 
+	dsw->num_ports = conf->nb_event_ports;
 	dsw->num_queues = conf->nb_event_queues;
 
 	return 0;
 }
 
 static struct rte_eventdev_ops dsw_evdev_ops = {
+	.port_setup = dsw_port_setup,
+	.port_def_conf = dsw_port_def_conf,
+	.port_release = dsw_port_release,
 	.queue_setup = dsw_queue_setup,
 	.queue_def_conf = dsw_queue_def_conf,
 	.queue_release = dsw_queue_release,
diff --git a/drivers/event/dsw/dsw_evdev.h b/drivers/event/dsw/dsw_evdev.h
index 5eda8d114..2a4f10421 100644
--- a/drivers/event/dsw/dsw_evdev.h
+++ b/drivers/event/dsw/dsw_evdev.h
@@ -5,6 +5,7 @@
 #ifndef _DSW_EVDEV_H_
 #define _DSW_EVDEV_H_
 
+#include <rte_event_ring.h>
 #include <rte_eventdev.h>
 
 #define DSW_PMD_NAME RTE_STR(event_dsw)
@@ -23,6 +24,31 @@
 #define DSW_MAX_FLOWS (1<<(DSW_MAX_FLOWS_BITS))
 #define DSW_MAX_FLOWS_MASK (DSW_MAX_FLOWS-1)
 
+/* The rings are dimensioned so that all in-flight events can reside
+ * on any one of the port rings, to avoid the trouble of having to
+ * care about the case where there's no room on the destination port's
+ * input ring.
+ */
+#define DSW_IN_RING_SIZE (DSW_MAX_EVENTS)
+
+struct dsw_port {
+	uint16_t id;
+
+	/* Keeping a pointer here to avoid container_of() calls, which
+	 * are expensive since they are very frequent and will result
+	 * in an integer multiplication (since the port id is an index
+	 * into the dsw_evdev port array).
+	 */
+	struct dsw_evdev *dsw;
+
+	uint16_t dequeue_depth;
+	uint16_t enqueue_depth;
+
+	int32_t new_event_threshold;
+
+	struct rte_event_ring *in_ring __rte_cache_aligned;
+} __rte_cache_aligned;
+
 struct dsw_queue {
 	uint8_t schedule_type;
 	uint16_t num_serving_ports;
@@ -31,6 +57,8 @@ struct dsw_queue {
 struct dsw_evdev {
 	struct rte_eventdev_data *data;
 
+	struct dsw_port ports[DSW_MAX_PORTS];
+	uint16_t num_ports;
 	struct dsw_queue queues[DSW_MAX_QUEUES];
 	uint8_t num_queues;
 };
-- 
2.17.1