New upstream version 17.08

[deb_dpdk.git] / drivers / net / failsafe / failsafe_eal.c

diff --git a/drivers/net/failsafe/failsafe_eal.c b/drivers/net/failsafe/failsafe_eal.c
new file mode 100644 (file)
index 0000000..c8f4318
--- /dev/null
+++ b/drivers/net/failsafe/failsafe_eal.c
@@ -0,0 +1,118 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright 2017 6WIND S.A.
+ *   Copyright 2017 Mellanox.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of 6WIND S.A. nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <rte_malloc.h>
+
+#include "failsafe_private.h"
+
+static int
+fs_bus_init(struct rte_eth_dev *dev)
+{
+       struct sub_device *sdev;
+       struct rte_devargs *da;
+       uint8_t i;
+       int ret;
+
+       FOREACH_SUBDEV(sdev, i, dev) {
+               if (sdev->state != DEV_PARSED)
+                       continue;
+               da = &sdev->devargs;
+               ret = rte_eal_hotplug_add(da->bus->name,
+                                         da->name,
+                                         da->args);
+               if (ret) {
+                       ERROR("sub_device %d probe failed %s%s%s", i,
+                             rte_errno ? "(" : "",
+                             rte_errno ? strerror(rte_errno) : "",
+                             rte_errno ? ")" : "");
+                       continue;
+               }
+               ETH(sdev) = rte_eth_dev_allocated(da->name);
+               if (ETH(sdev) == NULL) {
+                       ERROR("sub_device %d init went wrong", i);
+                       return -ENODEV;
+               }
+               SUB_ID(sdev) = i;
+               sdev->fs_dev = dev;
+               sdev->dev = ETH(sdev)->device;
+               ETH(sdev)->state = RTE_ETH_DEV_DEFERRED;
+               sdev->state = DEV_PROBED;
+       }
+       return 0;
+}
+
+int
+failsafe_eal_init(struct rte_eth_dev *dev)
+{
+       int ret;
+
+       ret = fs_bus_init(dev);
+       if (ret)
+               return ret;
+       if (PRIV(dev)->state < DEV_PROBED)
+               PRIV(dev)->state = DEV_PROBED;
+       fs_switch_dev(dev, NULL);
+       return 0;
+}
+
+static int
+fs_bus_uninit(struct rte_eth_dev *dev)
+{
+       struct sub_device *sdev = NULL;
+       uint8_t i;
+       int ret;
+
+       FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_PROBED) {
+               ret = rte_eal_hotplug_remove(sdev->bus->name,
+                                            sdev->dev->name);
+               if (ret) {
+                       ERROR("Failed to remove requested device %s",
+                             sdev->dev->name);
+                       continue;
+               }
+               sdev->state = DEV_PROBED - 1;
+       }
+       return 0;
+}
+
+int
+failsafe_eal_uninit(struct rte_eth_dev *dev)
+{
+       int ret;
+
+       ret = fs_bus_uninit(dev);
+       if (ret)
+               return ret;
+       PRIV(dev)->state = DEV_PROBED - 1;
+       return 0;
+}