event/dsw: add device registration and build system

This patch contains the Meson and GNU Make build system extensions
required for the Distributed Event Device, and also the initialization
code for the driver itself.

Signed-off-by: Mattias Rönnblom <mattias.ronnblom@ericsson.com>
Acked-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>

MAINTAINERS

@@ -921,6 +921,10 @@ F: doc/guides/eventdevs/sw.rst
 F: examples/eventdev_pipeline/
 F: doc/guides/sample_app_ug/eventdev_pipeline.rst
 
+Distributed Software Eventdev PMD
+M: Mattias Rönnblom <mattias.ronnblom@ericsson.com>
+F: drivers/event/dsw/
+
 Software OPDL Eventdev PMD
 M: Liang Ma <liang.j.ma@intel.com>
 M: Peter Mccarthy <peter.mccarthy@intel.com>

config/common_base

@@ -614,6 +614,11 @@ CONFIG_RTE_LIBRTE_PMD_SKELETON_EVENTDEV_DEBUG=n
 #
 CONFIG_RTE_LIBRTE_PMD_SW_EVENTDEV=y
 
+#
+# Compile PMD for distributed software event device
+#
+CONFIG_RTE_LIBRTE_PMD_DSW_EVENTDEV=y
+
 #
 # Compile PMD for octeontx sso event device
 #

drivers/event/Makefile

@@ -6,6 +6,7 @@ include $(RTE_SDK)/mk/rte.vars.mk
 
 DIRS-$(CONFIG_RTE_LIBRTE_PMD_SKELETON_EVENTDEV) += skeleton
 DIRS-$(CONFIG_RTE_LIBRTE_PMD_SW_EVENTDEV) += sw
+DIRS-$(CONFIG_RTE_LIBRTE_PMD_DSW_EVENTDEV) += dsw
 DIRS-$(CONFIG_RTE_LIBRTE_PMD_OCTEONTX_SSOVF) += octeontx
 ifeq ($(CONFIG_RTE_LIBRTE_DPAA_BUS),y)
 DIRS-$(CONFIG_RTE_LIBRTE_PMD_DPAA_EVENTDEV) += dpaa

drivers/event/dsw/Makefile

@@ -0,0 +1,26 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2018 Ericsson AB
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+LIB = librte_pmd_dsw_event.a
+
+CFLAGS += -DALLOW_EXPERIMENTAL_API
+CFLAGS += -O3
+CFLAGS += $(WERROR_FLAGS)
+CFLAGS += -Wno-format-nonliteral
+
+LDLIBS += -lrte_eal
+LDLIBS += -lrte_mbuf
+LDLIBS += -lrte_mempool
+LDLIBS += -lrte_ring
+LDLIBS += -lrte_eventdev
+LDLIBS += -lrte_bus_vdev
+
+LIBABIVER := 1
+
+EXPORT_MAP := rte_pmd_dsw_event_version.map
+
+SRCS-$(CONFIG_RTE_LIBRTE_PMD_DSW_EVENTDEV) += dsw_evdev.c
+
+include $(RTE_SDK)/mk/rte.lib.mk

drivers/event/dsw/dsw_evdev.c

@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Ericsson AB
+ */
+
+#include <rte_eventdev_pmd.h>
+#include <rte_eventdev_pmd_vdev.h>
+
+#include "dsw_evdev.h"
+
+#define EVENTDEV_NAME_DSW_PMD event_dsw
+
+static int
+dsw_probe(struct rte_vdev_device *vdev)
+{
+	const char *name;
+	struct rte_eventdev *dev;
+	struct dsw_evdev *dsw;
+
+	name = rte_vdev_device_name(vdev);
+
+	dev = rte_event_pmd_vdev_init(name, sizeof(struct dsw_evdev),
+				      rte_socket_id());
+	if (dev == NULL)
+		return -EFAULT;
+
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return 0;
+
+	dsw = dev->data->dev_private;
+	dsw->data = dev->data;
+
+	return 0;
+}
+
+static int
+dsw_remove(struct rte_vdev_device *vdev)
+{
+	const char *name;
+
+	name = rte_vdev_device_name(vdev);
+	if (name == NULL)
+		return -EINVAL;
+
+	return rte_event_pmd_vdev_uninit(name);
+}
+
+static struct rte_vdev_driver evdev_dsw_pmd_drv = {
+	.probe = dsw_probe,
+	.remove = dsw_remove
+};
+
+RTE_PMD_REGISTER_VDEV(EVENTDEV_NAME_DSW_PMD, evdev_dsw_pmd_drv);

drivers/event/dsw/dsw_evdev.h

@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Ericsson AB
+ */
+
+#ifndef _DSW_EVDEV_H_
+#define _DSW_EVDEV_H_
+
+#include <rte_eventdev.h>
+
+#define DSW_PMD_NAME RTE_STR(event_dsw)
+
+struct dsw_evdev {
+	struct rte_eventdev_data *data;
+};
+
+#endif

drivers/event/dsw/meson.build

@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2018 Ericsson AB
+
+allow_experimental_apis = true
+deps += ['bus_vdev']
+sources = files('dsw_evdev.c')

drivers/event/dsw/rte_pmd_dsw_event_version.map

@@ -0,0 +1,3 @@
+DPDK_18.11 {
+	local: *;
+};

drivers/event/meson.build

@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2017 Intel Corporation
 
-drivers = ['dpaa', 'dpaa2', 'octeontx', 'opdl', 'skeleton', 'sw']
+drivers = ['dpaa', 'dpaa2', 'octeontx', 'opdl', 'skeleton', 'sw', 'dsw']
 std_deps = ['eventdev', 'kvargs']
 config_flag_fmt = 'RTE_LIBRTE_@0@_EVENTDEV_PMD'
 driver_name_fmt = 'rte_pmd_@0@_event'

mk/rte.app.mk

@@ -240,6 +240,7 @@ endif # CONFIG_RTE_LIBRTE_COMPRESSDEV
 ifeq ($(CONFIG_RTE_LIBRTE_EVENTDEV),y)
 _LDLIBS-$(CONFIG_RTE_LIBRTE_PMD_SKELETON_EVENTDEV) += -lrte_pmd_skeleton_event
 _LDLIBS-$(CONFIG_RTE_LIBRTE_PMD_SW_EVENTDEV) += -lrte_pmd_sw_event
+_LDLIBS-$(CONFIG_RTE_LIBRTE_PMD_DSW_EVENTDEV) += -lrte_pmd_dsw_event
 _LDLIBS-$(CONFIG_RTE_LIBRTE_PMD_OCTEONTX_SSOVF) += -lrte_pmd_octeontx_ssovf
 ifeq ($(CONFIG_RTE_LIBRTE_DPAA_BUS),y)
 _LDLIBS-$(CONFIG_RTE_LIBRTE_PMD_DPAA_EVENTDEV) += -lrte_pmd_dpaa_event