From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jianfeng Tan Subject: [PATCH v5 7/8] virtio-user: add a new vdev named virtio-user Date: Mon, 30 May 2016 10:55:38 +0000 Message-ID: <1464605739-140761-8-git-send-email-jianfeng.tan@intel.com> References: <1446748276-132087-1-git-send-email-jianfeng.tan@intel.com> <1464605739-140761-1-git-send-email-jianfeng.tan@intel.com> Cc: Jianfeng Tan , Huawei Xie , rich.lane@bigswitch.com, yuanhan.liu@linux.intel.com, mst@redhat.com, nakajima.yoshihiro@lab.ntt.co.jp, p.fedin@samsung.com, ann.zhuangyanying@huawei.com, mukawa@igel.co.jp, nhorman@tuxdriver.com To: dev@dpdk.org Return-path: Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id CD09E697B for ; Mon, 30 May 2016 12:56:06 +0200 (CEST) In-Reply-To: <1464605739-140761-1-git-send-email-jianfeng.tan@intel.com> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Add a new virtual device named vhost-user, which can be used just like eth_ring, eth_null, etc. To reuse the code of original virtio, we do some adjustment in virtio_ethdev.c, such as remove key _static_ of eth_virtio_dev_init() so that it can be reused in virtual device; and we add some check to make sure it will not crash. Configured parameters include: - queues (optional, 1 by default), number of queue pairs, multi-queue not supported for now. - cq (optional, 0 by default), not supported for now. - mac (optional), random value will be given if not specified. - queue_size (optional, 256 by default), size of virtqueues. - path (madatory), path of vhost, depends on the file type, vhost user if the given path points to a unix socket; vhost-net if the given path points to a char device. - ifname (optional), specify the name of backend tap device; only valid when backend is vhost-net. When enable CONFIG_RTE_VIRTIO_VDEV (enabled by default), the compiled library can be used in both VM and container environment. Examples: path_vhost=/dev/vhost-net # use vhost-net as a backend path_vhost= # use vhost-user as a backend sudo ./examples/l2fwd/build/l2fwd -c 0x100000 -n 4 \ --socket-mem 0,1024 --no-pci --file-prefix=l2fwd \ --vdev=virtio-user0,mac=00:01:02:03:04:05,path=$path_vhost -- -p 0x1 Known issues: - Control queue and multi-queue are not supported yet. - Cannot work with --huge-unlink. - Cannot work with no-huge. - Cannot work when there are more than VHOST_MEMORY_MAX_NREGIONS(8) hugepages. - Root privilege is a must (mainly becase of sorting hugepages according to physical address). - Applications should not use file name like HUGEFILE_FMT ("%smap_%d"). Signed-off-by: Huawei Xie Signed-off-by: Jianfeng Tan Acked-by: Neil Horman --- drivers/net/virtio/virtio_ethdev.c | 19 +- drivers/net/virtio/virtio_ethdev.h | 2 + drivers/net/virtio/virtio_user/virtio_user_dev.c | 309 +++++++++++++++++++++++ 3 files changed, 323 insertions(+), 7 deletions(-) diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c index 1866afd..f8972f2 100644 --- a/drivers/net/virtio/virtio_ethdev.c +++ b/drivers/net/virtio/virtio_ethdev.c @@ -59,7 +59,6 @@ #include "virtqueue.h" #include "virtio_rxtx.h" -static int eth_virtio_dev_init(struct rte_eth_dev *eth_dev); static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev); static int virtio_dev_configure(struct rte_eth_dev *dev); static int virtio_dev_start(struct rte_eth_dev *dev); @@ -1038,7 +1037,7 @@ rx_func_get(struct rte_eth_dev *eth_dev) * This function is based on probe() function in virtio_pci.c * It returns 0 on success. */ -static int +int eth_virtio_dev_init(struct rte_eth_dev *eth_dev) { struct virtio_hw *hw = eth_dev->data->dev_private; @@ -1069,9 +1068,11 @@ eth_virtio_dev_init(struct rte_eth_dev *eth_dev) pci_dev = eth_dev->pci_dev; - ret = vtpci_init(pci_dev, hw, &dev_flags); - if (ret) - return ret; + if (pci_dev) { + ret = vtpci_init(pci_dev, hw, &dev_flags); + if (ret) + return ret; + } /* Reset the device although not necessary at startup */ vtpci_reset(hw); @@ -1163,7 +1164,8 @@ eth_virtio_dev_init(struct rte_eth_dev *eth_dev) PMD_INIT_LOG(DEBUG, "hw->max_rx_queues=%d hw->max_tx_queues=%d", hw->max_rx_queues, hw->max_tx_queues); - PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x", + if (pci_dev) + PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x", eth_dev->data->port_id, pci_dev->id.vendor_id, pci_dev->id.device_id); @@ -1442,7 +1444,10 @@ virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info) { struct virtio_hw *hw = dev->data->dev_private; - dev_info->driver_name = dev->driver->pci_drv.name; + if (dev->pci_dev) + dev_info->driver_name = dev->driver->pci_drv.name; + else + dev_info->driver_name = "virtio-user PMD"; dev_info->max_rx_queues = (uint16_t)hw->max_rx_queues; dev_info->max_tx_queues = (uint16_t)hw->max_tx_queues; dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE; diff --git a/drivers/net/virtio/virtio_ethdev.h b/drivers/net/virtio/virtio_ethdev.h index 66423a0..284afaa 100644 --- a/drivers/net/virtio/virtio_ethdev.h +++ b/drivers/net/virtio/virtio_ethdev.h @@ -113,6 +113,8 @@ uint16_t virtio_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t virtio_xmit_pkts_simple(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts); +int eth_virtio_dev_init(struct rte_eth_dev *eth_dev); + /* * The VIRTIO_NET_F_GUEST_TSO[46] features permit the host to send us * frames larger than 1514 bytes. We do not yet support software LRO diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c b/drivers/net/virtio/virtio_user/virtio_user_dev.c index 41d8ad1..5e4f60b 100644 --- a/drivers/net/virtio/virtio_user/virtio_user_dev.c +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c @@ -166,3 +166,312 @@ int virtio_user_stop_device(struct virtio_user_dev *dev) return vhost_call(dev->vhostfd, dev->type, VHOST_MSG_RESET_OWNER, NULL); } +static inline void parse_mac(struct virtio_user_dev *dev, const char *mac) +{ + int i, r; + uint32_t tmp[ETHER_ADDR_LEN]; + + if (!mac) + return; + + r = sscanf(mac, "%x:%x:%x:%x:%x:%x", &tmp[0], + &tmp[1], &tmp[2], &tmp[3], &tmp[4], &tmp[5]); + if (r == ETHER_ADDR_LEN) { + for (i = 0; i < ETHER_ADDR_LEN; ++i) + dev->mac_addr[i] = (uint8_t)tmp[i]; + dev->mac_specified = 1; + } else { + /* ignore the wrong mac, use random mac */ + PMD_DRV_LOG(ERR, "wrong format of mac: %s", mac); + } +} + +static int +virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues, + int queue_size, const char *mac, char *ifname) +{ + struct stat s; + + strncpy(dev->path, path, PATH_MAX); + dev->max_queue_pairs = queues; + dev->queue_pairs = 1; /* mq disabled by default */ + dev->queue_size = queue_size; + dev->mac_specified = 0; + parse_mac(dev, mac); + dev->vhostfd = -1; + dev->tapfd = -1; + + if (stat(dev->path, &s) < 0) { + PMD_INIT_LOG(ERR, "stat: %s failed, %s", dev->path, + strerror(errno)); + return -1; + } + + switch (s.st_mode & S_IFMT) { + case S_IFCHR: + dev->type = VHOST_KERNEL; + dev->vhostfd = vhost_kernel_setup(dev->path, ifname, + &dev->tapfd); + break; + case S_IFSOCK: + dev->type = VHOST_USER; + dev->vhostfd = vhost_user_setup(dev->path); + break; + default: + PMD_INIT_LOG(ERR, "unknown file type of %s", dev->path); + return -1; + } + if (dev->vhostfd < 0) { + PMD_INIT_LOG(ERR, "backend set up fails"); + return -1; + } + if (vhost_call(dev->vhostfd, dev->type, + VHOST_MSG_SET_OWNER, NULL) < 0) { + PMD_INIT_LOG(ERR, "set_owner fails: %s", strerror(errno)); + return -1; + } + + if (vhost_call(dev->vhostfd, dev->type, + VHOST_MSG_GET_FEATURES, &dev->features) < 0) { + PMD_INIT_LOG(ERR, "get_features failed: %s", strerror(errno)); + return -1; + } + if (dev->mac_specified) + dev->features |= (1ull << VIRTIO_NET_F_MAC); + /* disable it until we support CQ */ + dev->features &= ~(1ull << VIRTIO_NET_F_CTRL_VQ); + dev->features &= ~(1ull << VIRTIO_NET_F_CTRL_RX); + + return 0; + +} + +static void +virtio_user_dev_uninit(struct virtio_user_dev *dev) +{ + uint32_t i; + + if (dev->type == VHOST_KERNEL) + close(dev->tapfd); + + for (i = 0; i < dev->queue_pairs * 2; ++i) { + close(dev->callfds[i]); + close(dev->kickfds[i]); + } + + close(dev->vhostfd); +} + +static const char *valid_args[] = { +#define VIRTIO_USER_ARG_QUEUES_NUM "queues" + VIRTIO_USER_ARG_QUEUES_NUM, +#define VIRTIO_USER_ARG_CQ_NUM "cq" + VIRTIO_USER_ARG_CQ_NUM, +#define VIRTIO_USER_ARG_MAC "mac" + VIRTIO_USER_ARG_MAC, +#define VIRTIO_USER_ARG_PATH "path" + VIRTIO_USER_ARG_PATH, +#define VIRTIO_USER_ARG_QUEUE_SIZE "queue_size" + VIRTIO_USER_ARG_QUEUE_SIZE, +#define VIRTIO_USER_ARG_IFNAME "ifname" + VIRTIO_USER_ARG_IFNAME, + NULL +}; + +#define VIRTIO_USER_DEF_CQ_EN 0 +#define VIRTIO_USER_DEF_Q_NUM 1 +#define VIRTIO_USER_DEF_Q_SZ 256 + +static int +get_string_arg(const char *key __rte_unused, + const char *value, void *extra_args) +{ + if (!value || !extra_args) + return -EINVAL; + + *(char **)extra_args = strdup(value); + + return 0; +} + +static int +get_integer_arg(const char *key __rte_unused, + const char *value, void *extra_args) +{ + if (!value || !extra_args) + return -EINVAL; + + *(uint64_t *)extra_args = strtoull(value, NULL, 0); + + return 0; +} + +static struct rte_eth_dev * +virtio_user_eth_dev_alloc(const char *name) +{ + 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, RTE_ETH_DEV_VIRTUAL); + 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; + } + + 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->vtpci_ops = &vdev_ops; + hw->use_msix = 0; + hw->modern = 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; +} + +/* Dev initialization routine. Invoked once for each virtio vdev at + * EAL init time, see rte_eal_dev_init(). + * Returns 0 on success. + */ +static int +virtio_user_pmd_devinit(const char *name, const char *params) +{ + struct rte_kvargs *kvlist; + struct rte_eth_dev *eth_dev; + struct virtio_hw *hw; + uint64_t queues = VIRTIO_USER_DEF_Q_NUM; + uint64_t nb_cq = VIRTIO_USER_DEF_CQ_EN; + uint64_t queue_size = VIRTIO_USER_DEF_Q_SZ; + char *path = NULL; + char *mac_addr = NULL; + char *ifname = 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); + if (!kvlist) { + PMD_INIT_LOG(ERR, "error when parsing param"); + goto end; + } + + if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PATH) == 1) + rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PATH, + &get_string_arg, &path); + else { + PMD_INIT_LOG(ERR, "arg %s is mandatory for virtio-user\n", + VIRTIO_USER_ARG_QUEUE_SIZE); + goto end; + } + + if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MAC) == 1) + rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MAC, + &get_string_arg, &mac_addr); + + if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_IFNAME) == 1) + rte_kvargs_process(kvlist, VIRTIO_USER_ARG_IFNAME, + &get_string_arg, &ifname); + + if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE) == 1) + rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE, + &get_integer_arg, &queue_size); + + if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUES_NUM) == 1) + rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUES_NUM, + &get_integer_arg, &queues); + + if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_CQ_NUM) == 1) + rte_kvargs_process(kvlist, VIRTIO_USER_ARG_CQ_NUM, + &get_integer_arg, &nb_cq); + + eth_dev = virtio_user_eth_dev_alloc(name); + if (!eth_dev) { + PMD_INIT_LOG(ERR, "virtio-user fails to alloc device"); + goto end; + } + + hw = eth_dev->data->dev_private; + if (virtio_user_dev_init(hw->virtio_user_dev, path, queues, + queue_size, mac_addr, ifname) < 0) + goto end; + + /* previously called by rte_eal_pci_probe() for physical dev */ + if (eth_virtio_dev_init(eth_dev) < 0) { + PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails"); + goto end; + } + ret = 0; + +end: + if (path) + 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_devuninit(const char *name) +{ + struct rte_eth_dev *eth_dev; + struct virtio_hw *hw; + struct virtio_user_dev *dev; + + if (!name) + return -EINVAL; + + PMD_DRV_LOG(INFO, "Un-Initializing %s\n", name); + eth_dev = rte_eth_dev_allocated(name); + if (!eth_dev) + return -ENODEV; + + /* make sure the device is stopped, queues freed */ + rte_eth_dev_close(eth_dev->data->port_id); + + hw = eth_dev->data->dev_private; + 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; +} + +static struct rte_driver virtio_user_driver = { + .name = "virtio-user", + .type = PMD_VDEV, + .init = virtio_user_pmd_devinit, + .uninit = virtio_user_pmd_devuninit, +}; + +PMD_REGISTER_DRIVER(virtio_user_driver); -- 2.1.4