[dpdk-dev] [PATCH v6 01/23] event/dlb: add documentation and meson infrastructure

[Timothy McDaniel]

Increased RTE_EVENT_MAX_QUEUES_PER_DEV config option
from 64 to 255.

Note that config/rte_config.h contains several configuration
switches, providing for fine control of the PMD's
runtime behaviour.

The meson infrastructure is expanded as additional files are
added to this patchset.

Signed-off-by: Timothy McDaniel <timothy.mcdaniel at intel.com>
---
 MAINTAINERS                                     |  5 ++++
 config/rte_config.h                             |  8 +++++-
 doc/guides/eventdevs/dlb.rst                    | 36 +++++++++++++++++++++++++
 doc/guides/eventdevs/index.rst                  |  1 +
 drivers/event/dlb/meson.build                   | 13 +++++++++
 drivers/event/dlb/rte_pmd_dlb_event_version.map |  3 +++
 drivers/event/meson.build                       |  2 +-
 7 files changed, 66 insertions(+), 2 deletions(-)
 create mode 100644 doc/guides/eventdevs/dlb.rst
 create mode 100644 drivers/event/dlb/meson.build
 create mode 100644 drivers/event/dlb/rte_pmd_dlb_event_version.map

diff --git a/MAINTAINERS b/MAINTAINERS
index c0abbe0..2ca4a4f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1188,6 +1188,11 @@ M: Peter Mccarthy <peter.mccarthy at intel.com>
 F: drivers/event/opdl/
 F: doc/guides/eventdevs/opdl.rst
 
+Intel DLB Eventdev PMD
+M: Timothy McDaniel <timothy.mcdaniel at intel.com>
+F: drivers/event/dlb/
+F: doc/guides/eventdevs/dlb.rst
+
 
 Rawdev Drivers
 --------------
diff --git a/config/rte_config.h b/config/rte_config.h
index 0bae630..4262339 100644
--- a/config/rte_config.h
+++ b/config/rte_config.h
@@ -70,7 +70,7 @@
 
 /* eventdev defines */
 #define RTE_EVENT_MAX_DEVS 16
-#define RTE_EVENT_MAX_QUEUES_PER_DEV 64
+#define RTE_EVENT_MAX_QUEUES_PER_DEV 255
 #define RTE_EVENT_TIMER_ADAPTER_NUM_MAX 32
 #define RTE_EVENT_ETH_INTR_RING_SIZE 1024
 #define RTE_EVENT_CRYPTO_ADAPTER_MAX_INSTANCE 32
@@ -131,4 +131,10 @@
 /* QEDE PMD defines */
 #define RTE_LIBRTE_QEDE_FW ""
 
+/* DLB PMD defines */
+#define RTE_LIBRTE_PMD_DLB_POLL_INTERVAL 1000
+#define RTE_LIBRTE_PMD_DLB_UMWAIT_CTL_STATE  0
+#undef RTE_LIBRTE_PMD_DLB_QUELL_STATS
+#define RTE_LIBRTE_PMD_DLB_SW_CREDIT_QUANTA 32
+
 #endif /* _RTE_CONFIG_H_ */
diff --git a/doc/guides/eventdevs/dlb.rst b/doc/guides/eventdevs/dlb.rst
new file mode 100644
index 0000000..92341c0
--- /dev/null
+++ b/doc/guides/eventdevs/dlb.rst
@@ -0,0 +1,36 @@
+..  SPDX-License-Identifier: BSD-3-Clause
+    Copyright(c) 2020 Intel Corporation.
+
+Driver for the Intel® Dynamic Load Balancer (DLB)
+==================================================
+
+The DPDK dlb poll mode driver supports the Intel® Dynamic Load Balancer.
+
+Prerequisites
+-------------
+
+Follow the DPDK :ref:`Getting Started Guide for Linux <linux_gsg>` to setup
+the basic DPDK environment.
+
+Configuration
+-------------
+
+The DLB PF PMD is a user-space PMD that uses VFIO to gain direct
+device access. To use this operation mode, the PCIe PF device must be bound
+to a DPDK-compatible VFIO driver, such as vfio-pci.
+
+Eventdev API Notes
+------------------
+
+The DLB provides the functions of a DPDK event device; specifically, it
+supports atomic, ordered, and parallel scheduling events from queues to ports.
+However, the DLB hardware is not a perfect match to the eventdev API. Some DLB
+features are abstracted by the PMD (e.g. directed ports), some are only
+accessible as vdev command-line parameters, and certain eventdev features are
+not supported (e.g. the event flow ID is not maintained during scheduling).
+
+In general the dlb PMD is designed for ease-of-use and does not require a
+detailed understanding of the hardware, but these details are important when
+writing high-performance code. This section describes the places where the
+eventdev API and DLB misalign.
+
diff --git a/doc/guides/eventdevs/index.rst b/doc/guides/eventdevs/index.rst
index bb66a5e..4b915bf 100644
--- a/doc/guides/eventdevs/index.rst
+++ b/doc/guides/eventdevs/index.rst
@@ -11,6 +11,7 @@ application through the eventdev API.
     :maxdepth: 2
     :numbered:
 
+    dlb
     dpaa
     dpaa2
     dsw
diff --git a/drivers/event/dlb/meson.build b/drivers/event/dlb/meson.build
new file mode 100644
index 0000000..5324043
--- /dev/null
+++ b/drivers/event/dlb/meson.build
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2019-2020 Intel Corporation
+
+if not is_linux or not dpdk_conf.has('RTE_ARCH_X86_64')
+        build = false
+        reason = 'only supported on ARCH_X86_64 Linux'
+        subdir_done()
+endif
+
+sources = files(
+)
+
+deps += ['mbuf', 'mempool', 'ring', 'pci', 'bus_pci']
diff --git a/drivers/event/dlb/rte_pmd_dlb_event_version.map b/drivers/event/dlb/rte_pmd_dlb_event_version.map
new file mode 100644
index 0000000..4a76d1d
--- /dev/null
+++ b/drivers/event/dlb/rte_pmd_dlb_event_version.map
@@ -0,0 +1,3 @@
+DPDK_21 {
+	local: *;
+};
diff --git a/drivers/event/meson.build b/drivers/event/meson.build
index ebe76a7..5030764 100644
--- a/drivers/event/meson.build
+++ b/drivers/event/meson.build
@@ -5,7 +5,7 @@ if is_windows
 	subdir_done()
 endif
 
-drivers = ['dpaa', 'dpaa2', 'octeontx2', 'opdl', 'skeleton', 'sw', 'dsw']
+drivers = ['dlb', 'dpaa', 'dpaa2', 'octeontx2', 'opdl', 'skeleton', 'sw', 'dsw']
 if not (toolchain == 'gcc' and cc.version().version_compare('<4.8.6') and
 	dpdk_conf.has('RTE_ARCH_ARM64'))
 	drivers += 'octeontx'
-- 
2.6.4