initial code repo

[stor4nfv.git] / src / ceph / src / msg / async / dpdk / dpdk_rte.h

diff --git a/src/ceph/src/msg/async/dpdk/dpdk_rte.h b/src/ceph/src/msg/async/dpdk/dpdk_rte.h
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+++ b/src/ceph/src/msg/async/dpdk/dpdk_rte.h
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+/*
+ * This file is open source software, licensed to you under the terms
+ * of the Apache License, Version 2.0 (the "License").  See the NOTICE file
+ * distributed with this work for additional information regarding copyright
+ * ownership.  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.
+ */
+#ifndef CEPH_DPDK_RTE_H_
+#define CEPH_DPDK_RTE_H_
+
+
+#include <condition_variable>
+#include <mutex>
+#include <thread>
+
+#include <bitset>
+#include <rte_config.h>
+#include <rte_version.h>
+#include <boost/program_options.hpp>
+
+/*********************** Compat section ***************************************/
+// We currently support only versions 2.0 and above.
+#if (RTE_VERSION < RTE_VERSION_NUM(2,0,0,0))
+#error "DPDK version above 2.0.0 is required"
+#endif
+
+#if defined(RTE_MBUF_REFCNT_ATOMIC)
+#warning "CONFIG_RTE_MBUF_REFCNT_ATOMIC should be disabled in DPDK's " \
+         "config/common_linuxapp"
+#endif
+/******************************************************************************/
+
+namespace dpdk {
+
+// DPDK Environment Abstraction Layer
+class eal {
+ public:
+  using cpuset = std::bitset<RTE_MAX_LCORE>;
+
+  static std::mutex lock;
+  static std::condition_variable cond;
+  static std::list<std::function<void()>> funcs;
+  static int init(CephContext *c);
+  static void execute_on_master(std::function<void()> &&f) {
+    bool done = false;
+    std::unique_lock<std::mutex> l(lock);
+    funcs.emplace_back([&]() { f(); done = true; });
+    cond.notify_all();
+    while (!done)
+      cond.wait(l);
+  }
+  /**
+   * Returns the amount of memory needed for DPDK
+   * @param num_cpus Number of CPUs the application is going to use
+   *
+   * @return
+   */
+  static size_t mem_size(int num_cpus);
+  static bool initialized;
+  static std::thread t;
+};
+
+} // namespace dpdk
+#endif // CEPH_DPDK_RTE_H_