21c5ae36af
Type: improvement Change-Id: Idf3d440ee9763b54c973e6d87394b786eb66e307 Signed-off-by: Damjan Marion <damarion@cisco.com>
92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
static 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 (vlib_get_thread_index () == 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.node_index !=
|
|
admin_up_down_process_node.index))
|
|
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)
|
|
{
|
|
clib_error_t * error = 0;
|
|
|
|
/* register custom delay function */
|
|
rte_delay_us_callback_register (rte_delay_us_override_cb);
|
|
|
|
return error;
|
|
}
|
|
|
|
VLIB_INIT_FUNCTION (dpdk_main_init) =
|
|
{
|
|
.runs_after = VLIB_INITS("dpdk_init"),
|
|
};
|
|
|
|
VLIB_PLUGIN_REGISTER () = {
|
|
.version = VPP_BUILD_VER,
|
|
.description = "Data Plane Development Kit (DPDK)",
|
|
};
|