event/dlb: add documentation and build infrastructure

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.

Adds announcement of availability of the new driver
for Intel Dynamic Load Balancer 1.0 hardware.

Signed-off-by: Timothy McDaniel <timothy.mcdaniel@intel.com>
Reviewed-by: Gage Eads <gage.eads@intel.com>

diff --git a/MAINTAINERS b/MAINTAINERS
index c67fa74..295a471 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1176,6 +1176,11 @@ Cavium OCTEON TX timvf
 M: Pavan Nikhilesh <pbhagavatula@marvell.com>
 F: drivers/event/octeontx/timvf_*
 
+Intel DLB
+M: Timothy McDaniel <timothy.mcdaniel@intel.com>
+F: drivers/event/dlb/
+F: doc/guides/eventdevs/dlb.rst
+
 Intel DLB2
 M: Timothy McDaniel <timothy.mcdaniel@intel.com>
 F: drivers/event/dlb2/

diff --git a/config/rte_config.h b/config/rte_config.h
index 64aa333..25219f0 100644 (file)
--- a/config/rte_config.h
+++ b/config/rte_config.h
@@ -135,6 +135,12 @@
 /* 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
+
 /* DLB2 defines */
 #define RTE_LIBRTE_PMD_DLB2_POLL_INTERVAL 1000
 #define RTE_LIBRTE_PMD_DLB2_UMWAIT_CTL_STATE  0

diff --git a/doc/guides/eventdevs/dlb.rst b/doc/guides/eventdevs/dlb.rst
new file mode 100644 (file)
index 0000000..c71d22a
--- /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 738788d..f5b69b3 100644 (file)
--- 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
     dlb2
     dpaa
     dpaa2

diff --git a/doc/guides/rel_notes/release_20_11.rst b/doc/guides/rel_notes/release_20_11.rst
index e1b9cc1..f1a6925 100644 (file)
--- 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 v1.0 device.**
+
+  Added the new ``dlb`` eventdev driver for the Intel DLB V1.0 device. See the
+  :doc:`../eventdevs/dlb` eventdev guide for more details on this new driver.
+
 * **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

diff --git a/drivers/event/dlb/meson.build b/drivers/event/dlb/meson.build
new file mode 100644 (file)
index 0000000..68cb0ae
--- /dev/null
+++ b/drivers/event/dlb/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/dlb/version.map b/drivers/event/dlb/version.map
new file mode 100644 (file)
index 0000000..4a76d1d
--- /dev/null
+++ b/drivers/event/dlb/version.map
@@ -0,0 +1,3 @@
+DPDK_21 {
+       local: *;
+};

diff --git a/drivers/event/meson.build b/drivers/event/meson.build
index c433c10..c1a6990 100644 (file)
--- a/drivers/event/meson.build
+++ b/drivers/event/meson.build
@@ -5,7 +5,7 @@ if is_windows
        subdir_done()
 endif
 
-drivers = ['dlb2', 'dpaa', 'dpaa2', 'octeontx2', 'opdl', 'skeleton', 'sw',
+drivers = ['dlb', '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'))