New upstream version 18.02upstream/18.02

Change-Id: I89ed24cb2a49b78fe5be6970b99dd46c1499fcc3
Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>

1 files changed, 76 insertions, 50 deletions

diff --git a/drivers/net/failsafe/failsafe_eal.c b/drivers/net/failsafe/failsafe_eal.c
index 19d26f53..c3d67312 100644
--- a/drivers/net/failsafe/failsafe_eal.c
+++ b/drivers/net/failsafe/failsafe_eal.c
@@ -1,34 +1,6 @@
-/*-
- *   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.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2017 6WIND S.A.
+ * Copyright 2017 Mellanox.
  */
 
 #include <rte_malloc.h>
@@ -36,39 +8,93 @@
 #include "failsafe_private.h"
 
 static int
+fs_ethdev_portid_get(const char *name, uint16_t *port_id)
+{
+	uint16_t pid;
+	size_t len;
+
+	if (name == NULL) {
+		DEBUG("Null pointer is specified\n");
+		return -EINVAL;
+	}
+	len = strlen(name);
+	RTE_ETH_FOREACH_DEV(pid) {
+		if (!strncmp(name, rte_eth_devices[pid].device->name, len)) {
+			*port_id = pid;
+			return 0;
+		}
+	}
+	return -ENODEV;
+}
+
+static int
 fs_bus_init(struct rte_eth_dev *dev)
 {
 	struct sub_device *sdev;
 	struct rte_devargs *da;
 	uint8_t i;
-	uint16_t j;
+	uint16_t pid;
 	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;
-		}
-		RTE_ETH_FOREACH_DEV(j) {
-			if (strcmp(rte_eth_devices[j].device->name,
-				    da->name) == 0) {
-				ETH(sdev) = &rte_eth_devices[j];
-				break;
+		if (fs_ethdev_portid_get(da->name, &pid) != 0) {
+			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;
 			}
+			if (fs_ethdev_portid_get(da->name, &pid) != 0) {
+				ERROR("sub_device %d init went wrong", i);
+				return -ENODEV;
+			}
+		} else {
+			char devstr[DEVARGS_MAXLEN] = "";
+			struct rte_devargs *probed_da =
+					rte_eth_devices[pid].device->devargs;
+
+			/* Take control of device probed by EAL options. */
+			free(da->args);
+			memset(da, 0, sizeof(*da));
+			if (probed_da != NULL)
+				snprintf(devstr, sizeof(devstr), "%s,%s",
+					 probed_da->name, probed_da->args);
+			else
+				snprintf(devstr, sizeof(devstr), "%s",
+					 rte_eth_devices[pid].device->name);
+			ret = rte_eal_devargs_parse(devstr, da);
+			if (ret) {
+				ERROR("Probed devargs parsing failed with code"
+				      " %d", ret);
+				return ret;
+			}
+			INFO("Taking control of a probed sub device"
+			      " %d named %s", i, da->name);
 		}
-		if (ETH(sdev) == NULL) {
-			ERROR("sub_device %d init went wrong", i);
-			return -ENODEV;
+		ret = rte_eth_dev_owner_set(pid, &PRIV(dev)->my_owner);
+		if (ret < 0) {
+			INFO("sub_device %d owner set failed (%s),"
+			     " will try again later", i, strerror(-ret));
+			continue;
+		} else if (strncmp(rte_eth_devices[pid].device->name, da->name,
+			   strlen(da->name)) != 0) {
+			/*
+			 * The device probably was removed and its port id was
+			 * reallocated before ownership set.
+			 */
+			rte_eth_dev_owner_unset(pid, PRIV(dev)->my_owner.id);
+			INFO("sub_device %d was probably removed before taking"
+			     " ownership, will try again later", i);
+			continue;
 		}
+		ETH(sdev) = &rte_eth_devices[pid];
 		SUB_ID(sdev) = i;
 		sdev->fs_dev = dev;
 		sdev->dev = ETH(sdev)->device;