From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 3DBCCA0C4B; Tue, 13 Jul 2021 03:19:07 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 00ECA411C9; Tue, 13 Jul 2021 03:18:56 +0200 (CEST) Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by mails.dpdk.org (Postfix) with ESMTP id 70DA9411CE for ; Tue, 13 Jul 2021 03:18:54 +0200 (CEST) X-IronPort-AV: E=McAfee;i="6200,9189,10043"; a="208260585" X-IronPort-AV: E=Sophos;i="5.84,235,1620716400"; d="scan'208";a="208260585" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jul 2021 18:18:54 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,235,1620716400"; d="scan'208";a="569774131" Received: from npg_dpdk_virtio_jiayuhu_07.sh.intel.com ([10.67.119.25]) by fmsmga001.fm.intel.com with ESMTP; 12 Jul 2021 18:18:52 -0700 From: Jiayu Hu To: dev@dpdk.org Cc: maxime.coquelin@redhat.com, chenbo.xia@intel.com, Jiayu Hu Date: Tue, 13 Jul 2021 03:46:23 -0400 Message-Id: <1626162383-89674-4-git-send-email-jiayu.hu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1626162383-89674-1-git-send-email-jiayu.hu@intel.com> References: <1625823790-91995-2-git-send-email-jiayu.hu@intel.com> <1626162383-89674-1-git-send-email-jiayu.hu@intel.com> Subject: [dpdk-dev] [PATCH v4 3/3] vhost: add thread unsafe async registeration functions X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" This patch adds thread unsafe version for async register and unregister functions. Signed-off-by: Jiayu Hu --- doc/guides/prog_guide/vhost_lib.rst | 12 +++ lib/vhost/rte_vhost_async.h | 39 ++++++++++ lib/vhost/version.map | 4 + lib/vhost/vhost.c | 146 +++++++++++++++++++++++++++--------- 4 files changed, 167 insertions(+), 34 deletions(-) diff --git a/doc/guides/prog_guide/vhost_lib.rst b/doc/guides/prog_guide/vhost_lib.rst index affdc57..ffe09a3 100644 --- a/doc/guides/prog_guide/vhost_lib.rst +++ b/doc/guides/prog_guide/vhost_lib.rst @@ -256,6 +256,12 @@ The following is an overview of some key Vhost API functions: vhost invokes this function to get the copy data completed by async devices. +* ``rte_vhost_async_channel_register_thread_unsafe(vid, queue_id, config, ops)`` + Register a vhost queue with async copy device channel without + performing any locking. + + This function is only safe to call from within vhost callback functions. + * ``rte_vhost_async_channel_unregister(vid, queue_id)`` Unregister the async copy device channel from a vhost queue. @@ -268,6 +274,12 @@ The following is an overview of some key Vhost API functions: devices for all vhost queues in destroy_device(), when a virtio device is paused or shut down. +* ``rte_vhost_async_channel_unregister_thread_unsafe(vid, queue_id)`` + Unregister the async copy device channel from a vhost queue without + performing any locking. + + This function is only safe to call from within vhost callback functions. + * ``rte_vhost_submit_enqueue_burst(vid, queue_id, pkts, count, comp_pkts, comp_count)`` Submit an enqueue request to transmit ``count`` packets from host to guest diff --git a/lib/vhost/rte_vhost_async.h b/lib/vhost/rte_vhost_async.h index c93490d..e4d20a3 100644 --- a/lib/vhost/rte_vhost_async.h +++ b/lib/vhost/rte_vhost_async.h @@ -142,6 +142,45 @@ __rte_experimental int rte_vhost_async_channel_unregister(int vid, uint16_t queue_id); /** + * register an async channel for vhost without performing any locking + * + * @note This function does not perform any locking, and is only safe to call + * from within vhost callback functions. + * + * @param vid + * vhost device id async channel to be attached to + * @param queue_id + * vhost queue id async channel to be attached to + * @param config + * DMA channel configuration + * @param ops + * DMA operation callbacks + * @return + * 0 on success, -1 on failures + */ +__rte_experimental +int rte_vhost_async_channel_register_thread_unsafe(int vid, uint16_t queue_id, + struct rte_vhost_async_config config, + struct rte_vhost_async_channel_ops *ops); + +/** + * unregister a dma channel for vhost without performing any lock + * + * @note This function does not perform any locking, and is only safe to call + * from within vhost callback functions. + * + * @param vid + * vhost device id DMA channel to be detached + * @param queue_id + * vhost queue id DMA channel to be detached + * @return + * 0 on success, -1 on failures + */ +__rte_experimental +int rte_vhost_async_channel_unregister_thread_unsafe(int vid, + uint16_t queue_id); + +/** * This function submits enqueue data to async engine. Successfully * enqueued packets can be transfer completed or being occupied by DMA * engines, when this API returns. Transfer completed packets are returned diff --git a/lib/vhost/version.map b/lib/vhost/version.map index 9103a23..2363db8 100644 --- a/lib/vhost/version.map +++ b/lib/vhost/version.map @@ -79,4 +79,8 @@ EXPERIMENTAL { # added in 21.05 rte_vhost_get_negotiated_protocol_features; + + # added in 21.08 + rte_vhost_async_channel_register_thread_unsafe; + rte_vhost_async_channel_unregister_thread_unsafe; }; diff --git a/lib/vhost/vhost.c b/lib/vhost/vhost.c index a20f05a..2d12ce5 100644 --- a/lib/vhost/vhost.c +++ b/lib/vhost/vhost.c @@ -1619,42 +1619,19 @@ int rte_vhost_extern_callback_register(int vid, return 0; } -int rte_vhost_async_channel_register(int vid, uint16_t queue_id, +static __rte_always_inline int +async_channel_register(int vid, uint16_t queue_id, struct rte_vhost_async_config config, struct rte_vhost_async_channel_ops *ops) { - struct vhost_virtqueue *vq; struct virtio_net *dev = get_device(vid); - - if (dev == NULL || ops == NULL) - return -1; - - if (queue_id >= VHOST_MAX_VRING) - return -1; - - vq = dev->virtqueue[queue_id]; - - if (unlikely(vq == NULL || !dev->async_copy)) - return -1; - - if (unlikely(!(config.features & RTE_VHOST_ASYNC_INORDER))) { - VHOST_LOG_CONFIG(ERR, - "async copy is not supported on non-inorder mode " - "(vid %d, qid: %d)\n", vid, queue_id); - return -1; - } - - if (unlikely(ops->check_completed_copies == NULL || - ops->transfer_data == NULL)) - return -1; - - rte_spinlock_lock(&vq->access_lock); + struct vhost_virtqueue *vq = dev->virtqueue[queue_id]; if (unlikely(vq->async_registered)) { VHOST_LOG_CONFIG(ERR, "async register failed: channel already registered " "(vid %d, qid: %d)\n", vid, queue_id); - goto reg_out; + return -1; } vq->async_pkts_info = rte_malloc_socket(NULL, @@ -1665,7 +1642,7 @@ int rte_vhost_async_channel_register(int vid, uint16_t queue_id, VHOST_LOG_CONFIG(ERR, "async register failed: cannot allocate memory for async_pkts_info " "(vid %d, qid: %d)\n", vid, queue_id); - goto reg_out; + return -1; } vq->it_pool = rte_malloc_socket(NULL, @@ -1676,7 +1653,7 @@ int rte_vhost_async_channel_register(int vid, uint16_t queue_id, VHOST_LOG_CONFIG(ERR, "async register failed: cannot allocate memory for it_pool " "(vid %d, qid: %d)\n", vid, queue_id); - goto reg_out; + return -1; } vq->vec_pool = rte_malloc_socket(NULL, @@ -1687,7 +1664,7 @@ int rte_vhost_async_channel_register(int vid, uint16_t queue_id, VHOST_LOG_CONFIG(ERR, "async register failed: cannot allocate memory for vec_pool " "(vid %d, qid: %d)\n", vid, queue_id); - goto reg_out; + return -1; } if (vq_is_packed(dev)) { @@ -1699,7 +1676,7 @@ int rte_vhost_async_channel_register(int vid, uint16_t queue_id, VHOST_LOG_CONFIG(ERR, "async register failed: cannot allocate memory for async buffers " "(vid %d, qid: %d)\n", vid, queue_id); - goto reg_out; + return -1; } } else { vq->async_descs_split = rte_malloc_socket(NULL, @@ -1710,7 +1687,7 @@ int rte_vhost_async_channel_register(int vid, uint16_t queue_id, VHOST_LOG_CONFIG(ERR, "async register failed: cannot allocate memory for async descs " "(vid %d, qid: %d)\n", vid, queue_id); - goto reg_out; + return -1; } } @@ -1722,10 +1699,76 @@ int rte_vhost_async_channel_register(int vid, uint16_t queue_id, vq->async_registered = true; -reg_out: + return 0; +} + +int rte_vhost_async_channel_register(int vid, uint16_t queue_id, + struct rte_vhost_async_config config, + struct rte_vhost_async_channel_ops *ops) +{ + struct vhost_virtqueue *vq; + struct virtio_net *dev = get_device(vid); + int ret; + + if (dev == NULL || ops == NULL) + return -1; + + if (queue_id >= VHOST_MAX_VRING) + return -1; + + vq = dev->virtqueue[queue_id]; + + if (unlikely(vq == NULL || !dev->async_copy)) + return -1; + + if (unlikely(!(config.features & RTE_VHOST_ASYNC_INORDER))) { + VHOST_LOG_CONFIG(ERR, + "async copy is not supported on non-inorder mode " + "(vid %d, qid: %d)\n", vid, queue_id); + return -1; + } + + if (unlikely(ops->check_completed_copies == NULL || + ops->transfer_data == NULL)) + return -1; + + rte_spinlock_lock(&vq->access_lock); + ret = async_channel_register(vid, queue_id, config, ops); rte_spinlock_unlock(&vq->access_lock); - return 0; + return ret; +} + +int rte_vhost_async_channel_register_thread_unsafe(int vid, uint16_t queue_id, + struct rte_vhost_async_config config, + struct rte_vhost_async_channel_ops *ops) +{ + struct vhost_virtqueue *vq; + struct virtio_net *dev = get_device(vid); + + if (dev == NULL || ops == NULL) + return -1; + + if (queue_id >= VHOST_MAX_VRING) + return -1; + + vq = dev->virtqueue[queue_id]; + + if (unlikely(vq == NULL || !dev->async_copy)) + return -1; + + if (unlikely(!(config.features & RTE_VHOST_ASYNC_INORDER))) { + VHOST_LOG_CONFIG(ERR, + "async copy is not supported on non-inorder mode " + "(vid %d, qid: %d)\n", vid, queue_id); + return -1; + } + + if (unlikely(ops->check_completed_copies == NULL || + ops->transfer_data == NULL)) + return -1; + + return async_channel_register(vid, queue_id, config, ops); } int rte_vhost_async_channel_unregister(int vid, uint16_t queue_id) @@ -1775,5 +1818,40 @@ int rte_vhost_async_channel_unregister(int vid, uint16_t queue_id) return ret; } +int rte_vhost_async_channel_unregister_thread_unsafe(int vid, + uint16_t queue_id) +{ + struct vhost_virtqueue *vq; + struct virtio_net *dev = get_device(vid); + + if (dev == NULL) + return -1; + + if (queue_id >= VHOST_MAX_VRING) + return -1; + + vq = dev->virtqueue[queue_id]; + + if (vq == NULL) + return -1; + + if (!vq->async_registered) + return 0; + + if (vq->async_pkts_inflight_n) { + VHOST_LOG_CONFIG(ERR, "Failed to unregister async channel. " + "async inflight packets must be completed before unregistration.\n"); + return -1; + } + + vhost_free_async_mem(vq); + + vq->async_ops.transfer_data = NULL; + vq->async_ops.check_completed_copies = NULL; + vq->async_registered = false; + + return 0; +} + RTE_LOG_REGISTER_SUFFIX(vhost_config_log_level, config, INFO); RTE_LOG_REGISTER_SUFFIX(vhost_data_log_level, data, WARNING); -- 2.7.4