event/dlb: add flexible interface

This commit introduces the flexible interface. This
interface allows the core code to operate in PF mode (direct
hardware access) or bifurcated mode (hardware configured via
kernel driver). This driver currently only supports PF modei,
but bifurcated mode will be added in a future patch-set.
Note that the flexible interface is not used for data path
operations, and thus there are no performance concerns
related to the use of function pointers.

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

diff --git a/drivers/event/dlb/dlb.c b/drivers/event/dlb/dlb.c
index 1659f93036e19d12b4b41b9b711d69b2adca46aa..8008a50f98a7d6e64df9cc4a55c154971b6d6c46 100644 (file)
--- a/drivers/event/dlb/dlb.c
+++ b/drivers/event/dlb/dlb.c
@@ -33,6 +33,7 @@
 #include <rte_eventdev_pmd.h>
 
 #include "dlb_priv.h"
+#include "dlb_iface.h"
 #include "dlb_inline_fns.h"
 
 /*

diff --git a/drivers/event/dlb/dlb_iface.c b/drivers/event/dlb/dlb_iface.c
new file mode 100644 (file)
index 0000000..dd72120
--- /dev/null
+++ b/drivers/event/dlb/dlb_iface.c
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2016-2020 Intel Corporation
+ */
+
+#include <stdint.h>
+
+#include "dlb_priv.h"
+
+/* DLB PMD Internal interface function pointers.
+ * If VDEV (bifurcated PMD),  these will resolve to functions that issue ioctls
+ * serviced by DLB kernel module.
+ * If PCI (PF PMD),  these will be implemented locally in user mode.
+ */
+
+void (*dlb_iface_low_level_io_init)(struct dlb_eventdev *dlb);
+
+int (*dlb_iface_open)(struct dlb_hw_dev *handle, const char *name);
+
+int (*dlb_iface_get_device_version)(struct dlb_hw_dev *handle,
+                                   uint8_t *revision);
+
+int (*dlb_iface_get_num_resources)(struct dlb_hw_dev *handle,
+                                  struct dlb_get_num_resources_args *rsrcs);
+
+int (*dlb_iface_get_cq_poll_mode)(struct dlb_hw_dev *handle,
+                                 enum dlb_cq_poll_modes *mode);
+

diff --git a/drivers/event/dlb/dlb_iface.h b/drivers/event/dlb/dlb_iface.h
new file mode 100644 (file)
index 0000000..416d1b3
--- /dev/null
+++ b/drivers/event/dlb/dlb_iface.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2016-2020 Intel Corporation
+ */
+
+#ifndef _DLB_IFACE_H
+#define _DLB_IFACE_H
+
+/* DLB PMD Internal interface function pointers.
+ * If VDEV (bifurcated PMD), these will resolve to functions that issue ioctls
+ * serviced by DLB kernel module.
+ * If PCI (PF PMD), these will be implemented locally in user mode.
+ */
+
+extern void (*dlb_iface_low_level_io_init)(struct dlb_eventdev *dlb);
+
+extern int (*dlb_iface_open)(struct dlb_hw_dev *handle, const char *name);
+
+extern int (*dlb_iface_get_device_version)(struct dlb_hw_dev *handle,
+                                          uint8_t *revision);
+
+extern int (*dlb_iface_get_num_resources)(struct dlb_hw_dev *handle,
+                                  struct dlb_get_num_resources_args *rsrcs);
+
+extern int (*dlb_iface_get_cq_poll_mode)(struct dlb_hw_dev *handle,
+                                        enum dlb_cq_poll_modes *mode);
+
+#endif /* _DLB_IFACE_H */

diff --git a/drivers/event/dlb/meson.build b/drivers/event/dlb/meson.build
index 61c0182e0c16710fb8aa4f8840ae8237b20faf61..0e66cdc1a0f512f74ccb3786b456800288f21aff 100644 (file)
--- a/drivers/event/dlb/meson.build
+++ b/drivers/event/dlb/meson.build
@@ -8,6 +8,7 @@ if not is_linux or not dpdk_conf.has('RTE_ARCH_X86_64')
 endif
 
 sources = files('dlb.c',
+               'dlb_iface.c',
                'pf/dlb_main.c',
                'pf/dlb_pf.c'
 )

diff --git a/drivers/event/dlb/pf/dlb_pf.c b/drivers/event/dlb/pf/dlb_pf.c
index 3f836f39c51d329fcf1a7dd074f0b6bb5deb7ac1..05fd76c61dc794ac36ead05f6e257f873ca501b6 100644 (file)
--- a/drivers/event/dlb/pf/dlb_pf.c
+++ b/drivers/event/dlb/pf/dlb_pf.c
@@ -27,6 +27,7 @@
 #include <rte_string_fns.h>
 
 #include "../dlb_priv.h"
+#include "../dlb_iface.h"
 #include "../dlb_inline_fns.h"
 #include "dlb_main.h"
 #include "base/dlb_hw_types.h"