X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=drivers%2Fnet%2Fvirtio%2Fvirtio_user_ethdev.c;h=f8791391adb7d2bb61efb2ebf2e74528a9710124;hb=8a853e3f0275efc8b05cb195085d45946942744a;hp=013600e41236eded83c942b66df7acbf1d22db04;hpb=ce3d555e43e3795b5d9507fcfc76b7a0a92fd0d6;p=deb_dpdk.git diff --git a/drivers/net/virtio/virtio_user_ethdev.c b/drivers/net/virtio/virtio_user_ethdev.c index 013600e4..f8791391 100644 --- a/drivers/net/virtio/virtio_user_ethdev.c +++ b/drivers/net/virtio/virtio_user_ethdev.c @@ -1,43 +1,18 @@ -/*- - * 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 #include #include +#include +#include #include #include -#include +#include +#include +#include #include "virtio_ethdev.h" #include "virtio_logs.h" @@ -49,6 +24,92 @@ #define virtio_user_get_dev(hw) \ ((struct virtio_user_dev *)(hw)->virtio_user_dev) +static int +virtio_user_server_reconnect(struct virtio_user_dev *dev) +{ + int ret; + int connectfd; + struct rte_eth_dev *eth_dev = &rte_eth_devices[dev->port_id]; + + connectfd = accept(dev->listenfd, NULL, NULL); + if (connectfd < 0) + return -1; + + dev->vhostfd = connectfd; + 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; + } + + dev->device_features |= dev->frontend_features; + + /* umask vhost-user unsupported features */ + dev->device_features &= ~(dev->unsupported_features); + + dev->features &= dev->device_features; + + ret = virtio_user_start_device(dev); + if (ret < 0) + return -1; + + if (dev->queue_pairs > 1) { + ret = virtio_user_handle_mq(dev, dev->queue_pairs); + if (ret != 0) { + PMD_INIT_LOG(ERR, "Fails to enable multi-queue pairs!"); + return -1; + } + } + if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) { + if (rte_intr_disable(eth_dev->intr_handle) < 0) { + PMD_DRV_LOG(ERR, "interrupt disable failed"); + return -1; + } + rte_intr_callback_unregister(eth_dev->intr_handle, + virtio_interrupt_handler, + eth_dev); + eth_dev->intr_handle->fd = connectfd; + rte_intr_callback_register(eth_dev->intr_handle, + virtio_interrupt_handler, eth_dev); + + if (rte_intr_enable(eth_dev->intr_handle) < 0) { + PMD_DRV_LOG(ERR, "interrupt enable failed"); + return -1; + } + } + PMD_INIT_LOG(NOTICE, "server mode virtio-user reconnection succeeds!"); + return 0; +} + +static void +virtio_user_delayed_handler(void *param) +{ + struct virtio_hw *hw = (struct virtio_hw *)param; + struct rte_eth_dev *eth_dev = &rte_eth_devices[hw->port_id]; + struct virtio_user_dev *dev = virtio_user_get_dev(hw); + + if (rte_intr_disable(eth_dev->intr_handle) < 0) { + PMD_DRV_LOG(ERR, "interrupt disable failed"); + return; + } + rte_intr_callback_unregister(eth_dev->intr_handle, + virtio_interrupt_handler, eth_dev); + if (dev->is_server) { + if (dev->vhostfd >= 0) { + close(dev->vhostfd); + dev->vhostfd = -1; + } + eth_dev->intr_handle->fd = dev->listenfd; + rte_intr_callback_register(eth_dev->intr_handle, + virtio_interrupt_handler, eth_dev); + if (rte_intr_enable(eth_dev->intr_handle) < 0) { + PMD_DRV_LOG(ERR, "interrupt enable failed"); + return; + } + } +} + static void virtio_user_read_dev_config(struct virtio_hw *hw, size_t offset, void *dst, int length) @@ -63,8 +124,48 @@ virtio_user_read_dev_config(struct virtio_hw *hw, size_t offset, return; } - if (offset == offsetof(struct virtio_net_config, status)) + if (offset == offsetof(struct virtio_net_config, status)) { + char buf[128]; + + if (dev->vhostfd >= 0) { + int r; + int flags; + + flags = fcntl(dev->vhostfd, F_GETFL); + if (fcntl(dev->vhostfd, F_SETFL, + flags | O_NONBLOCK) == -1) { + PMD_DRV_LOG(ERR, "error setting O_NONBLOCK flag"); + return; + } + r = recv(dev->vhostfd, buf, 128, MSG_PEEK); + if (r == 0 || (r < 0 && errno != EAGAIN)) { + dev->status &= (~VIRTIO_NET_S_LINK_UP); + PMD_DRV_LOG(ERR, "virtio-user port %u is down", + hw->port_id); + + /* This function could be called in the process + * of interrupt handling, callback cannot be + * unregistered here, set an alarm to do it. + */ + rte_eal_alarm_set(1, + virtio_user_delayed_handler, + (void *)hw); + } else { + dev->status |= VIRTIO_NET_S_LINK_UP; + } + if (fcntl(dev->vhostfd, F_SETFL, + flags & ~O_NONBLOCK) == -1) { + PMD_DRV_LOG(ERR, "error clearing O_NONBLOCK flag"); + return; + } + } else if (dev->is_server) { + dev->status &= (~VIRTIO_NET_S_LINK_UP); + if (virtio_user_server_reconnect(dev) >= 0) + dev->status |= VIRTIO_NET_S_LINK_UP; + } + *(uint16_t *)dst = dev->status; + } if (offset == offsetof(struct virtio_net_config, max_virtqueue_pairs)) *(uint16_t *)dst = dev->max_queue_pairs; @@ -82,7 +183,7 @@ virtio_user_write_dev_config(struct virtio_hw *hw, size_t offset, for (i = 0; i < ETHER_ADDR_LEN; ++i) dev->mac_addr[i] = ((const uint8_t *)src)[i]; else - PMD_DRV_LOG(ERR, "not supported offset=%zu, len=%d\n", + PMD_DRV_LOG(ERR, "not supported offset=%zu, len=%d", offset, length); } @@ -135,17 +236,26 @@ virtio_user_set_features(struct virtio_hw *hw, uint64_t features) static uint8_t virtio_user_get_isr(struct virtio_hw *hw __rte_unused) { - /* When config interrupt happens, driver calls this function to query - * what kinds of change happen. Interrupt mode not supported for now. + /* rxq interrupts and config interrupt are separated in virtio-user, + * here we only report config change. */ - return 0; + return VIRTIO_PCI_ISR_CONFIG; } static uint16_t virtio_user_set_config_irq(struct virtio_hw *hw __rte_unused, uint16_t vec __rte_unused) { - return VIRTIO_MSI_NO_VECTOR; + return 0; +} + +static uint16_t +virtio_user_set_queue_irq(struct virtio_hw *hw __rte_unused, + struct virtqueue *vq __rte_unused, + uint16_t vec) +{ + /* pretend we have done that */ + return vec; } /* This function is to get the queue size, aka, number of descs, of a specified @@ -212,20 +322,20 @@ virtio_user_notify_queue(struct virtio_hw *hw, struct virtqueue *vq) } if (write(dev->kickfds[vq->vq_queue_index], &buf, sizeof(buf)) < 0) - PMD_DRV_LOG(ERR, "failed to kick backend: %s\n", + PMD_DRV_LOG(ERR, "failed to kick backend: %s", strerror(errno)); } const struct virtio_pci_ops virtio_user_ops = { .read_dev_cfg = virtio_user_read_dev_config, .write_dev_cfg = virtio_user_write_dev_config, - .reset = virtio_user_reset, .get_status = virtio_user_get_status, .set_status = virtio_user_set_status, .get_features = virtio_user_get_features, .set_features = virtio_user_set_features, .get_isr = virtio_user_get_isr, .set_config_irq = virtio_user_set_config_irq, + .set_queue_irq = virtio_user_set_queue_irq, .get_queue_num = virtio_user_get_queue_num, .setup_queue = virtio_user_setup_queue, .del_queue = virtio_user_del_queue, @@ -243,12 +353,21 @@ static const char *valid_args[] = { VIRTIO_USER_ARG_PATH, #define VIRTIO_USER_ARG_QUEUE_SIZE "queue_size" VIRTIO_USER_ARG_QUEUE_SIZE, +#define VIRTIO_USER_ARG_INTERFACE_NAME "iface" + VIRTIO_USER_ARG_INTERFACE_NAME, +#define VIRTIO_USER_ARG_SERVER_MODE "server" + VIRTIO_USER_ARG_SERVER_MODE, +#define VIRTIO_USER_ARG_MRG_RXBUF "mrg_rxbuf" + VIRTIO_USER_ARG_MRG_RXBUF, +#define VIRTIO_USER_ARG_IN_ORDER "in_order" + VIRTIO_USER_ARG_IN_ORDER, NULL }; #define VIRTIO_USER_DEF_CQ_EN 0 #define VIRTIO_USER_DEF_Q_NUM 1 #define VIRTIO_USER_DEF_Q_SZ 256 +#define VIRTIO_USER_DEF_SERVER_MODE 0 static int get_string_arg(const char *key __rte_unused, @@ -259,6 +378,9 @@ get_string_arg(const char *key __rte_unused, *(char **)extra_args = strdup(value); + if (!*(char **)extra_args) + return -ENOMEM; + return 0; } @@ -274,49 +396,45 @@ get_integer_arg(const char *key __rte_unused, return 0; } +static struct rte_vdev_driver virtio_user_driver; + static struct rte_eth_dev * -virtio_user_eth_dev_alloc(const char *name) +virtio_user_eth_dev_alloc(struct rte_vdev_device *vdev) { struct rte_eth_dev *eth_dev; struct rte_eth_dev_data *data; struct virtio_hw *hw; struct virtio_user_dev *dev; - eth_dev = rte_eth_dev_allocate(name); + eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*hw)); if (!eth_dev) { PMD_INIT_LOG(ERR, "cannot alloc rte_eth_dev"); return NULL; } data = eth_dev->data; - - hw = rte_zmalloc(NULL, sizeof(*hw), 0); - if (!hw) { - PMD_INIT_LOG(ERR, "malloc virtio_hw failed"); - rte_eth_dev_release_port(eth_dev); - return NULL; - } + hw = eth_dev->data->dev_private; dev = rte_zmalloc(NULL, sizeof(*dev), 0); if (!dev) { PMD_INIT_LOG(ERR, "malloc virtio_user_dev failed"); rte_eth_dev_release_port(eth_dev); - rte_free(hw); return NULL; } hw->port_id = data->port_id; + dev->port_id = data->port_id; virtio_hw_internal[hw->port_id].vtpci_ops = &virtio_user_ops; - hw->use_msix = 0; + /* + * MSIX is required to enable LSC (see virtio_init_device). + * Here just pretend that we support msix. + */ + hw->use_msix = 1; hw->modern = 0; - hw->use_simple_rxtx = 0; + hw->use_simple_rx = 0; + hw->use_inorder_rx = 0; + hw->use_inorder_tx = 0; hw->virtio_user_dev = dev; - data->dev_private = hw; - data->numa_node = SOCKET_ID_ANY; - data->kdrv = RTE_KDRV_NONE; - data->dev_flags = RTE_ETH_DEV_DETACHABLE; - eth_dev->pci_dev = NULL; - eth_dev->driver = NULL; return eth_dev; } @@ -327,16 +445,15 @@ virtio_user_eth_dev_free(struct rte_eth_dev *eth_dev) struct virtio_hw *hw = data->dev_private; rte_free(hw->virtio_user_dev); - rte_free(hw); rte_eth_dev_release_port(eth_dev); } /* Dev initialization routine. Invoked once for each virtio vdev at - * EAL init time, see rte_eal_dev_init(). + * EAL init time, see rte_bus_probe(). * Returns 0 on success. */ static int -virtio_user_pmd_probe(const char *name, const char *params) +virtio_user_pmd_probe(struct rte_vdev_device *dev) { struct rte_kvargs *kvlist = NULL; struct rte_eth_dev *eth_dev; @@ -344,17 +461,15 @@ virtio_user_pmd_probe(const char *name, const char *params) uint64_t queues = VIRTIO_USER_DEF_Q_NUM; uint64_t cq = VIRTIO_USER_DEF_CQ_EN; uint64_t queue_size = VIRTIO_USER_DEF_Q_SZ; + uint64_t server_mode = VIRTIO_USER_DEF_SERVER_MODE; + uint64_t mrg_rxbuf = 1; + uint64_t in_order = 1; char *path = NULL; + char *ifname = NULL; char *mac_addr = NULL; int ret = -1; - if (!params || params[0] == '\0') { - PMD_INIT_LOG(ERR, "arg %s is mandatory for virtio_user", - VIRTIO_USER_ARG_QUEUE_SIZE); - goto end; - } - - kvlist = rte_kvargs_parse(params, valid_args); + kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_args); if (!kvlist) { PMD_INIT_LOG(ERR, "error when parsing param"); goto end; @@ -368,11 +483,27 @@ virtio_user_pmd_probe(const char *name, const char *params) goto end; } } else { - PMD_INIT_LOG(ERR, "arg %s is mandatory for virtio_user\n", - VIRTIO_USER_ARG_QUEUE_SIZE); + PMD_INIT_LOG(ERR, "arg %s is mandatory for virtio_user", + VIRTIO_USER_ARG_PATH); goto end; } + if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME) == 1) { + if (is_vhost_user_by_type(path)) { + PMD_INIT_LOG(ERR, + "arg %s applies only to vhost-kernel backend", + VIRTIO_USER_ARG_INTERFACE_NAME); + goto end; + } + + if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME, + &get_string_arg, &ifname) < 0) { + PMD_INIT_LOG(ERR, "error to parse %s", + VIRTIO_USER_ARG_INTERFACE_NAME); + goto end; + } + } + if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MAC) == 1) { if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MAC, &get_string_arg, &mac_addr) < 0) { @@ -400,6 +531,15 @@ virtio_user_pmd_probe(const char *name, const char *params) } } + if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_SERVER_MODE) == 1) { + if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_SERVER_MODE, + &get_integer_arg, &server_mode) < 0) { + PMD_INIT_LOG(ERR, "error to parse %s", + VIRTIO_USER_ARG_SERVER_MODE); + goto end; + } + } + if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_CQ_NUM) == 1) { if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_CQ_NUM, &get_integer_arg, &cq) < 0) { @@ -416,26 +556,68 @@ virtio_user_pmd_probe(const char *name, const char *params) goto end; } - eth_dev = virtio_user_eth_dev_alloc(name); - if (!eth_dev) { - PMD_INIT_LOG(ERR, "virtio_user fails to alloc device"); + if (queues > VIRTIO_MAX_VIRTQUEUE_PAIRS) { + PMD_INIT_LOG(ERR, "arg %s %" PRIu64 " exceeds the limit %u", + VIRTIO_USER_ARG_QUEUES_NUM, queues, + VIRTIO_MAX_VIRTQUEUE_PAIRS); goto end; } - hw = eth_dev->data->dev_private; - if (virtio_user_dev_init(hw->virtio_user_dev, path, queues, cq, - queue_size, mac_addr) < 0) { - PMD_INIT_LOG(ERR, "virtio_user_dev_init fails"); - virtio_user_eth_dev_free(eth_dev); - goto end; + if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MRG_RXBUF) == 1) { + if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MRG_RXBUF, + &get_integer_arg, &mrg_rxbuf) < 0) { + PMD_INIT_LOG(ERR, "error to parse %s", + VIRTIO_USER_ARG_MRG_RXBUF); + goto end; + } } - /* previously called by rte_eal_pci_probe() for physical dev */ + if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_IN_ORDER) == 1) { + if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_IN_ORDER, + &get_integer_arg, &in_order) < 0) { + PMD_INIT_LOG(ERR, "error to parse %s", + VIRTIO_USER_ARG_IN_ORDER); + goto end; + } + } + + if (rte_eal_process_type() == RTE_PROC_PRIMARY) { + struct virtio_user_dev *vu_dev; + + eth_dev = virtio_user_eth_dev_alloc(dev); + if (!eth_dev) { + PMD_INIT_LOG(ERR, "virtio_user fails to alloc device"); + goto end; + } + + hw = eth_dev->data->dev_private; + vu_dev = virtio_user_get_dev(hw); + if (server_mode == 1) + vu_dev->is_server = true; + else + vu_dev->is_server = false; + if (virtio_user_dev_init(hw->virtio_user_dev, path, queues, cq, + queue_size, mac_addr, &ifname, mrg_rxbuf, + in_order) < 0) { + PMD_INIT_LOG(ERR, "virtio_user_dev_init fails"); + virtio_user_eth_dev_free(eth_dev); + goto end; + } + + } else { + eth_dev = rte_eth_dev_attach_secondary(rte_vdev_device_name(dev)); + if (!eth_dev) + goto end; + } + + /* previously called by rte_pci_probe() for physical dev */ if (eth_virtio_dev_init(eth_dev) < 0) { PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails"); virtio_user_eth_dev_free(eth_dev); goto end; } + + rte_eth_dev_probing_finish(eth_dev); ret = 0; end: @@ -445,21 +627,24 @@ end: free(path); if (mac_addr) free(mac_addr); + if (ifname) + free(ifname); return ret; } -/** Called by rte_eth_dev_detach() */ static int -virtio_user_pmd_remove(const char *name) +virtio_user_pmd_remove(struct rte_vdev_device *vdev) { + const char *name; struct rte_eth_dev *eth_dev; struct virtio_hw *hw; struct virtio_user_dev *dev; - if (!name) + if (!vdev) return -EINVAL; - PMD_DRV_LOG(INFO, "Un-Initializing %s\n", name); + name = rte_vdev_device_name(vdev); + PMD_DRV_LOG(INFO, "Un-Initializing %s", name); eth_dev = rte_eth_dev_allocated(name); if (!eth_dev) return -ENODEV; @@ -471,8 +656,6 @@ virtio_user_pmd_remove(const char *name) dev = hw->virtio_user_dev; virtio_user_dev_uninit(dev); - rte_free(eth_dev->data->dev_private); - rte_free(eth_dev->data); rte_eth_dev_release_port(eth_dev); return 0; @@ -490,4 +673,8 @@ RTE_PMD_REGISTER_PARAM_STRING(net_virtio_user, "mac= " "cq= " "queue_size= " - "queues="); + "queues= " + "iface= " + "server=<0|1> " + "mrg_rxbuf=<0|1> " + "in_order=<0|1>");