X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=drivers%2Fnet%2Fvirtio%2Fvirtio_user%2Fvirtio_user_dev.c;h=b4997ee3f7fcce7ef33b9562e045d6f7769b2342;hb=8d01b9cd70a67cdafd5b965a70420c3bd7fb3f82;hp=79412714a30cfe1abad4e8a9d34166fd3d715dbb;hpb=f239aed5e674965691846e8ce3f187dd47523689;p=deb_dpdk.git

diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c b/drivers/net/virtio/virtio_user/virtio_user_dev.c
index 79412714..b4997ee3 100644
--- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
+++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
@@ -1,34 +1,5 @@
-/*-
- *   BSD LICENSE
- *
- *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
- *   All rights reserved.
- *
- *   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 Intel Corporation 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(c) 2010-2016 Intel Corporation
  */
 
 #include <stdint.h>
@@ -42,10 +13,14 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 
+#include <rte_eal_memconfig.h>
+
 #include "vhost.h"
 #include "virtio_user_dev.h"
 #include "../virtio_ethdev.h"
 
+#define VIRTIO_USER_MEM_EVENT_CLB_NAME "virtio_user_mem_event_clb"
+
 static int
 virtio_user_create_queue(struct virtio_user_dev *dev, uint32_t queue_sel)
 {
@@ -122,12 +97,46 @@ virtio_user_queue_setup(struct virtio_user_dev *dev,
 	return 0;
 }
 
+int
+is_vhost_user_by_type(const char *path)
+{
+	struct stat sb;
+
+	if (stat(path, &sb) == -1)
+		return 0;
+
+	return S_ISSOCK(sb.st_mode);
+}
+
 int
 virtio_user_start_device(struct virtio_user_dev *dev)
 {
+	struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
 	uint64_t features;
 	int ret;
 
+	/*
+	 * XXX workaround!
+	 *
+	 * We need to make sure that the locks will be
+	 * taken in the correct order to avoid deadlocks.
+	 *
+	 * Before releasing this lock, this thread should
+	 * not trigger any memory hotplug events.
+	 *
+	 * This is a temporary workaround, and should be
+	 * replaced when we get proper supports from the
+	 * memory subsystem in the future.
+	 */
+	rte_rwlock_read_lock(&mcfg->memory_hotplug_lock);
+	pthread_mutex_lock(&dev->mutex);
+
+	if (is_vhost_user_by_type(dev->path) && dev->vhostfd < 0)
+		goto error;
+
+	/* Do not check return as already done in init, or reset in stop */
+	dev->ops->send_request(dev, VHOST_USER_SET_OWNER, NULL);
+
 	/* Step 0: tell vhost to create queues */
 	if (virtio_user_queue_setup(dev, virtio_user_create_queue) < 0)
 		goto error;
@@ -158,8 +167,14 @@ virtio_user_start_device(struct virtio_user_dev *dev)
 	 */
 	dev->ops->enable_qp(dev, 0, 1);
 
+	dev->started = true;
+	pthread_mutex_unlock(&dev->mutex);
+	rte_rwlock_read_unlock(&mcfg->memory_hotplug_lock);
+
 	return 0;
 error:
+	pthread_mutex_unlock(&dev->mutex);
+	rte_rwlock_read_unlock(&mcfg->memory_hotplug_lock);
 	/* TODO: free resource here or caller to check */
 	return -1;
 }
@@ -168,9 +183,18 @@ int virtio_user_stop_device(struct virtio_user_dev *dev)
 {
 	uint32_t i;
 
+	pthread_mutex_lock(&dev->mutex);
 	for (i = 0; i < dev->max_queue_pairs; ++i)
 		dev->ops->enable_qp(dev, i, 0);
 
+	if (dev->ops->send_request(dev, VHOST_USER_RESET_OWNER, NULL) < 0) {
+		PMD_DRV_LOG(INFO, "Failed to reset the device\n");
+		pthread_mutex_unlock(&dev->mutex);
+		return -1;
+	}
+	dev->started = false;
+	pthread_mutex_unlock(&dev->mutex);
+
 	return 0;
 }
 
@@ -195,17 +219,6 @@ parse_mac(struct virtio_user_dev *dev, const char *mac)
 	}
 }
 
-int
-is_vhost_user_by_type(const char *path)
-{
-	struct stat sb;
-
-	if (stat(path, &sb) == -1)
-		return 0;
-
-	return S_ISSOCK(sb.st_mode);
-}
-
 static int
 virtio_user_dev_init_notify(struct virtio_user_dev *dev)
 {
@@ -270,12 +283,52 @@ virtio_user_fill_intr_handle(struct virtio_user_dev *dev)
 	eth_dev->intr_handle->nb_efd = dev->max_queue_pairs;
 	eth_dev->intr_handle->max_intr = dev->max_queue_pairs + 1;
 	eth_dev->intr_handle->type = RTE_INTR_HANDLE_VDEV;
+	/* For virtio vdev, no need to read counter for clean */
+	eth_dev->intr_handle->efd_counter_size = 0;
+	eth_dev->intr_handle->fd = -1;
 	if (dev->vhostfd >= 0)
 		eth_dev->intr_handle->fd = dev->vhostfd;
+	else if (dev->is_server)
+		eth_dev->intr_handle->fd = dev->listenfd;
 
 	return 0;
 }
 
+static void
+virtio_user_mem_event_cb(enum rte_mem_event type __rte_unused,
+						 const void *addr __rte_unused,
+						 size_t len __rte_unused,
+						 void *arg)
+{
+	struct virtio_user_dev *dev = arg;
+	struct rte_memseg_list *msl;
+	uint16_t i;
+
+	/* ignore externally allocated memory */
+	msl = rte_mem_virt2memseg_list(addr);
+	if (msl->external)
+		return;
+
+	pthread_mutex_lock(&dev->mutex);
+
+	if (dev->started == false)
+		goto exit;
+
+	/* Step 1: pause the active queues */
+	for (i = 0; i < dev->queue_pairs; i++)
+		dev->ops->enable_qp(dev, i, 0);
+
+	/* Step 2: update memory regions */
+	dev->ops->send_request(dev, VHOST_USER_SET_MEM_TABLE, NULL);
+
+	/* Step 3: resume the active queues */
+	for (i = 0; i < dev->queue_pairs; i++)
+		dev->ops->enable_qp(dev, i, 1);
+
+exit:
+	pthread_mutex_unlock(&dev->mutex);
+}
+
 static int
 virtio_user_dev_setup(struct virtio_user_dev *dev)
 {
@@ -285,21 +338,32 @@ virtio_user_dev_setup(struct virtio_user_dev *dev)
 	dev->vhostfds = NULL;
 	dev->tapfds = NULL;
 
-	if (is_vhost_user_by_type(dev->path)) {
-		dev->ops = &ops_user;
-	} else {
-		dev->ops = &ops_kernel;
-
-		dev->vhostfds = malloc(dev->max_queue_pairs * sizeof(int));
-		dev->tapfds = malloc(dev->max_queue_pairs * sizeof(int));
-		if (!dev->vhostfds || !dev->tapfds) {
-			PMD_INIT_LOG(ERR, "Failed to malloc");
+	if (dev->is_server) {
+		if (access(dev->path, F_OK) == 0 &&
+		    !is_vhost_user_by_type(dev->path)) {
+			PMD_DRV_LOG(ERR, "Server mode doesn't support vhost-kernel!");
 			return -1;
 		}
-
-		for (q = 0; q < dev->max_queue_pairs; ++q) {
-			dev->vhostfds[q] = -1;
-			dev->tapfds[q] = -1;
+		dev->ops = &virtio_ops_user;
+	} else {
+		if (is_vhost_user_by_type(dev->path)) {
+			dev->ops = &virtio_ops_user;
+		} else {
+			dev->ops = &virtio_ops_kernel;
+
+			dev->vhostfds = malloc(dev->max_queue_pairs *
+					       sizeof(int));
+			dev->tapfds = malloc(dev->max_queue_pairs *
+					     sizeof(int));
+			if (!dev->vhostfds || !dev->tapfds) {
+				PMD_INIT_LOG(ERR, "Failed to malloc");
+				return -1;
+			}
+
+			for (q = 0; q < dev->max_queue_pairs; ++q) {
+				dev->vhostfds[q] = -1;
+				dev->tapfds[q] = -1;
+			}
 		}
 	}
 
@@ -332,17 +396,22 @@ virtio_user_dev_setup(struct virtio_user_dev *dev)
 	 1ULL << VIRTIO_NET_F_GUEST_CSUM	|	\
 	 1ULL << VIRTIO_NET_F_GUEST_TSO4	|	\
 	 1ULL << VIRTIO_NET_F_GUEST_TSO6	|	\
+	 1ULL << VIRTIO_F_IN_ORDER		|	\
 	 1ULL << VIRTIO_F_VERSION_1)
 
 int
 virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
-		     int cq, int queue_size, const char *mac, char **ifname)
+		     int cq, int queue_size, const char *mac, char **ifname,
+		     int mrg_rxbuf, int in_order)
 {
+	pthread_mutex_init(&dev->mutex, NULL);
 	snprintf(dev->path, PATH_MAX, "%s", path);
+	dev->started = 0;
 	dev->max_queue_pairs = queues;
 	dev->queue_pairs = 1; /* mq disabled by default */
 	dev->queue_size = queue_size;
 	dev->mac_specified = 0;
+	dev->unsupported_features = 0;
 	parse_mac(dev, mac);
 
 	if (*ifname) {
@@ -354,18 +423,46 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
 		PMD_INIT_LOG(ERR, "backend set up fails");
 		return -1;
 	}
-	if (dev->ops->send_request(dev, VHOST_USER_SET_OWNER, NULL) < 0) {
-		PMD_INIT_LOG(ERR, "set_owner fails: %s", strerror(errno));
-		return -1;
+
+	if (!dev->is_server) {
+		if (dev->ops->send_request(dev, VHOST_USER_SET_OWNER,
+					   NULL) < 0) {
+			PMD_INIT_LOG(ERR, "set_owner fails: %s",
+				     strerror(errno));
+			return -1;
+		}
+
+		if (dev->ops->send_request(dev, VHOST_USER_GET_FEATURES,
+					   &dev->device_features) < 0) {
+			PMD_INIT_LOG(ERR, "get_features failed: %s",
+				     strerror(errno));
+			return -1;
+		}
+	} else {
+		/* We just pretend vhost-user can support all these features.
+		 * Note that this could be problematic that if some feature is
+		 * negotiated but not supported by the vhost-user which comes
+		 * later.
+		 */
+		dev->device_features = VIRTIO_USER_SUPPORTED_FEATURES;
 	}
 
-	if (dev->ops->send_request(dev, VHOST_USER_GET_FEATURES,
-			    &dev->device_features) < 0) {
-		PMD_INIT_LOG(ERR, "get_features failed: %s", strerror(errno));
-		return -1;
+	if (!mrg_rxbuf) {
+		dev->device_features &= ~(1ull << VIRTIO_NET_F_MRG_RXBUF);
+		dev->unsupported_features |= (1ull << VIRTIO_NET_F_MRG_RXBUF);
+	}
+
+	if (!in_order) {
+		dev->device_features &= ~(1ull << VIRTIO_F_IN_ORDER);
+		dev->unsupported_features |= (1ull << VIRTIO_F_IN_ORDER);
 	}
-	if (dev->mac_specified)
+
+	if (dev->mac_specified) {
 		dev->device_features |= (1ull << VIRTIO_NET_F_MAC);
+	} else {
+		dev->device_features &= ~(1ull << VIRTIO_NET_F_MAC);
+		dev->unsupported_features |= (1ull << VIRTIO_NET_F_MAC);
+	}
 
 	if (cq) {
 		/* device does not really need to know anything about CQ,
@@ -380,6 +477,14 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
 		dev->device_features &= ~(1ull << VIRTIO_NET_F_GUEST_ANNOUNCE);
 		dev->device_features &= ~(1ull << VIRTIO_NET_F_MQ);
 		dev->device_features &= ~(1ull << VIRTIO_NET_F_CTRL_MAC_ADDR);
+		dev->unsupported_features |= (1ull << VIRTIO_NET_F_CTRL_VQ);
+		dev->unsupported_features |= (1ull << VIRTIO_NET_F_CTRL_RX);
+		dev->unsupported_features |= (1ull << VIRTIO_NET_F_CTRL_VLAN);
+		dev->unsupported_features |=
+			(1ull << VIRTIO_NET_F_GUEST_ANNOUNCE);
+		dev->unsupported_features |= (1ull << VIRTIO_NET_F_MQ);
+		dev->unsupported_features |=
+			(1ull << VIRTIO_NET_F_CTRL_MAC_ADDR);
 	}
 
 	/* The backend will not report this feature, we add it explicitly */
@@ -387,6 +492,16 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
 		dev->device_features |= (1ull << VIRTIO_NET_F_STATUS);
 
 	dev->device_features &= VIRTIO_USER_SUPPORTED_FEATURES;
+	dev->unsupported_features |= ~VIRTIO_USER_SUPPORTED_FEATURES;
+
+	if (rte_mem_event_callback_register(VIRTIO_USER_MEM_EVENT_CLB_NAME,
+				virtio_user_mem_event_cb, dev)) {
+		if (rte_errno != ENOTSUP) {
+			PMD_INIT_LOG(ERR, "Failed to register mem event"
+					" callback\n");
+			return -1;
+		}
+	}
 
 	return 0;
 }
@@ -398,6 +513,8 @@ virtio_user_dev_uninit(struct virtio_user_dev *dev)
 
 	virtio_user_stop_device(dev);
 
+	rte_mem_event_callback_unregister(VIRTIO_USER_MEM_EVENT_CLB_NAME, dev);
+
 	for (i = 0; i < dev->max_queue_pairs * 2; ++i) {
 		close(dev->callfds[i]);
 		close(dev->kickfds[i]);
@@ -405,6 +522,11 @@ virtio_user_dev_uninit(struct virtio_user_dev *dev)
 
 	close(dev->vhostfd);
 
+	if (dev->is_server && dev->listenfd >= 0) {
+		close(dev->listenfd);
+		dev->listenfd = -1;
+	}
+
 	if (dev->vhostfds) {
 		for (i = 0; i < dev->max_queue_pairs; ++i)
 			close(dev->vhostfds[i]);
@@ -413,9 +535,12 @@ virtio_user_dev_uninit(struct virtio_user_dev *dev)
 	}
 
 	free(dev->ifname);
+
+	if (dev->is_server)
+		unlink(dev->path);
 }
 
-static uint8_t
+uint8_t
 virtio_user_handle_mq(struct virtio_user_dev *dev, uint16_t q_pairs)
 {
 	uint16_t i;
@@ -427,11 +552,15 @@ virtio_user_handle_mq(struct virtio_user_dev *dev, uint16_t q_pairs)
 		return -1;
 	}
 
-	for (i = 0; i < q_pairs; ++i)
-		ret |= dev->ops->enable_qp(dev, i, 1);
-	for (i = q_pairs; i < dev->max_queue_pairs; ++i)
-		ret |= dev->ops->enable_qp(dev, i, 0);
-
+	/* Server mode can't enable queue pairs if vhostfd is invalid,
+	 * always return 0 in this case.
+	 */
+	if (!dev->is_server || dev->vhostfd >= 0) {
+		for (i = 0; i < q_pairs; ++i)
+			ret |= dev->ops->enable_qp(dev, i, 1);
+		for (i = q_pairs; i < dev->max_queue_pairs; ++i)
+			ret |= dev->ops->enable_qp(dev, i, 0);
+	}
 	dev->queue_pairs = q_pairs;
 
 	return ret;