summaryrefslogtreecommitdiffstats
path: root/src/plugins/dpdk/main.c
diff options
context:
space:
mode:
authorDamjan Marion <damarion@cisco.com>2017-02-28 19:22:22 +0100
committerDave Barach <openvpp@barachs.net>2017-03-01 22:06:31 +0000
commitc3a814be9dc769be942ff8029c7b6eccd4b3af05 (patch)
treedd152b3e92281ab52f806ed2ad237c9fb0607e8b /src/plugins/dpdk/main.c
parentf71ef1dddfc7cf34944c510b85bec074f431bb12 (diff)
dpdk: be a plugin
Change-Id: I238258cdeb77035adc5e88903d824593d0a1da90 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/plugins/dpdk/main.c')
-rw-r--r--src/plugins/dpdk/main.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/src/plugins/dpdk/main.c b/src/plugins/dpdk/main.c
new file mode 100644
index 00000000000..8073a50ae4e
--- /dev/null
+++ b/src/plugins/dpdk/main.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/vnet.h>
+#include <vnet/plugin/plugin.h>
+#include <dpdk/device/dpdk.h>
+#include <vpp/app/version.h>
+
+/*
+ * Called by the dpdk driver's rte_delay_us() function.
+ * Return 0 to have the dpdk do a regular delay loop.
+ * Return 1 if to skip the delay loop because we are suspending
+ * the calling vlib process instead.
+ */
+int
+rte_delay_us_override (unsigned us)
+{
+ vlib_main_t *vm;
+
+ /* Don't bother intercepting for short delays */
+ if (us < 10)
+ return 0;
+
+ /*
+ * Only intercept if we are in a vlib process.
+ * If we are called from a vlib worker thread or the vlib main
+ * thread then do not intercept. (Must not be called from an
+ * independent pthread).
+ */
+ if (os_get_cpu_number () == 0)
+ {
+ /*
+ * We're in the vlib main thread or a vlib process. Make sure
+ * the process is running and we're not still initializing.
+ */
+ vm = vlib_get_main ();
+ if (vlib_in_process_context (vm))
+ {
+ /* Only suspend for the admin_down_process */
+ vlib_process_t *proc = vlib_get_current_process (vm);
+ if (!(proc->flags & VLIB_PROCESS_IS_RUNNING) ||
+ (proc->node_runtime.function != admin_up_down_process))
+ return 0;
+
+ f64 delay = 1e-6 * us;
+ vlib_process_suspend (vm, delay);
+ return 1;
+ }
+ }
+ return 0; // no override
+}
+
+static void
+rte_delay_us_override_cb (unsigned us)
+{
+ if (rte_delay_us_override (us) == 0)
+ rte_delay_us_block (us);
+}
+
+static clib_error_t * dpdk_main_init (vlib_main_t * vm)
+{
+ dpdk_main_t * dm = &dpdk_main;
+ clib_error_t * error = 0;
+
+ dm->vlib_main = vm;
+ dm->vnet_main = vnet_get_main ();
+
+ if ((error = vlib_call_init_function (vm, dpdk_init)))
+ return error;
+
+ /* register custom delay function */
+ rte_delay_us_callback_register (rte_delay_us_override_cb);
+
+ return error;
+}
+
+VLIB_INIT_FUNCTION (dpdk_main_init);
+
+/* *INDENT-OFF* */
+VLIB_PLUGIN_REGISTER () = {
+ .version = VPP_BUILD_VER,
+};
+/* *INDENT-ON* */