[dpdk-dev] [PATCH v10 01/23] event/dlb2: add documentation and meson build infrastructure

[Timothy McDaniel <timothy.mcdaniel@intel.com>]

Adds the meson build infrastructure, which includes
compile-time constants in rte_config.h. DLB2 is
only supported on Linux 64 bit X86 platforms at this time.

Adds announcement of availability for the new driver
for Intel Dynamic Load Balancer 2.0 hardware.

Signed-off-by: Timothy McDaniel <timothy.mcdaniel@intel.com>
Reviewed-by: Gage Eads <gage.eads@intel.com>
---
 MAINTAINERS                            |  5 +++++
 config/rte_config.h                    |  7 ++++++
 doc/guides/eventdevs/dlb2.rst          | 40 ++++++++++++++++++++++++++++++++++
 doc/guides/eventdevs/index.rst         |  1 +
 doc/guides/rel_notes/release_20_11.rst |  5 +++++
 drivers/event/dlb2/meson.build         | 15 +++++++++++++
 drivers/event/dlb2/version.map         |  3 +++
 drivers/event/meson.build              |  3 ++-
 8 files changed, 78 insertions(+), 1 deletion(-)
 create mode 100644 doc/guides/eventdevs/dlb2.rst
 create mode 100644 drivers/event/dlb2/meson.build
 create mode 100644 drivers/event/dlb2/version.map

diff --git a/MAINTAINERS b/MAINTAINERS
index 5b390d1..c67fa74 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1176,6 +1176,11 @@ Cavium OCTEON TX timvf
 M: Pavan Nikhilesh <pbhagavatula@marvell.com>
 F: drivers/event/octeontx/timvf_*
 
+Intel DLB2
+M: Timothy McDaniel <timothy.mcdaniel@intel.com>
+F: drivers/event/dlb2/
+F: doc/guides/eventdevs/dlb2.rst
+
 Marvell OCTEON TX2
 M: Pavan Nikhilesh <pbhagavatula@marvell.com>
 M: Jerin Jacob <jerinj@marvell.com>
diff --git a/config/rte_config.h b/config/rte_config.h
index b78c6aa..64aa333 100644
--- a/config/rte_config.h
+++ b/config/rte_config.h
@@ -135,4 +135,11 @@
 /* QEDE PMD defines */
 #define RTE_LIBRTE_QEDE_FW ""
 
+/* DLB2 defines */
+#define RTE_LIBRTE_PMD_DLB2_POLL_INTERVAL 1000
+#define RTE_LIBRTE_PMD_DLB2_UMWAIT_CTL_STATE  0
+#undef RTE_LIBRTE_PMD_DLB2_QUELL_STATS
+#define RTE_LIBRTE_PMD_DLB2_SW_CREDIT_QUANTA 32
+#define RTE_PMD_DLB2_DEFAULT_DEPTH_THRESH 256
+
 #endif /* _RTE_CONFIG_H_ */
diff --git a/doc/guides/eventdevs/dlb2.rst b/doc/guides/eventdevs/dlb2.rst
new file mode 100644
index 0000000..e3091c9
--- /dev/null
+++ b/doc/guides/eventdevs/dlb2.rst
@@ -0,0 +1,40 @@
+..  SPDX-License-Identifier: BSD-3-Clause
+    Copyright(c) 2020 Intel Corporation.
+
+Driver for the Intel® Dynamic Load Balancer (DLB2)
+==================================================
+
+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 DLB2 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 DLB2 provides the functions of a DPDK event device; specifically, it
+supports atomic, ordered, and parallel scheduling events from queues to ports.
+However, the DLB2 hardware is not a perfect match to the eventdev API. Some DLB2
+features are abstracted by the PMD such as directed ports.
+
+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 DLB2 misalign.
+
+Flow ID
+~~~~~~~
+
+The flow ID field is preserved in the event when it is scheduled in the
+DLB2.
+
diff --git a/doc/guides/eventdevs/index.rst b/doc/guides/eventdevs/index.rst
index bb66a5e..738788d 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:
 
+    dlb2
     dpaa
     dpaa2
     dsw
diff --git a/doc/guides/rel_notes/release_20_11.rst b/doc/guides/rel_notes/release_20_11.rst
index 88b9086..e1b9cc1 100644
--- a/doc/guides/rel_notes/release_20_11.rst
+++ b/doc/guides/rel_notes/release_20_11.rst
@@ -295,6 +295,11 @@ New Features
   Added performance tuning arguments to allow tuning the scheduler for
   better throughtput in high core count use cases.
 
+* **Added a new driver for the Intel Dynamic Load Balancer v2.0 device.**
+
+  Added the new ``dlb2`` eventdev driver for the Intel DLB V2.0 device. See the
+  :doc:`../eventdevs/dlb2` eventdev guide for more details on this new driver.
+
 * **Updated ioat rawdev driver**
 
   The ioat rawdev driver has been updated and enhanced. Changes include:
diff --git a/drivers/event/dlb2/meson.build b/drivers/event/dlb2/meson.build
new file mode 100644
index 0000000..68cb0ae
--- /dev/null
+++ b/drivers/event/dlb2/meson.build
@@ -0,0 +1,15 @@
+# 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(
+)
+
+headers = files()
+
+deps += ['mbuf', 'mempool', 'ring', 'pci', 'bus_pci']
diff --git a/drivers/event/dlb2/version.map b/drivers/event/dlb2/version.map
new file mode 100644
index 0000000..4a76d1d
--- /dev/null
+++ b/drivers/event/dlb2/version.map
@@ -0,0 +1,3 @@
+DPDK_21 {
+	local: *;
+};
diff --git a/drivers/event/meson.build b/drivers/event/meson.build
index a7dac99..c433c10 100644
--- a/drivers/event/meson.build
+++ b/drivers/event/meson.build
@@ -5,7 +5,8 @@ if is_windows
 	subdir_done()
 endif
 
-drivers = ['dpaa', 'dpaa2', 'octeontx2', 'opdl', 'skeleton', 'sw', 'dsw']
+drivers = ['dlb2', '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