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 474ACA0542; Tue, 6 Sep 2022 07:22:11 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 3D03A4114E; Tue, 6 Sep 2022 07:22:10 +0200 (CEST) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by mails.dpdk.org (Postfix) with ESMTP id 040D040697 for ; Tue, 6 Sep 2022 07:22:07 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1662441728; x=1693977728; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=D3w2SWb9MYvsplCbgckHaAiFUSkgs140YZo2KiBsZHY=; b=AUz4Z70XA8bs3L9UrOKeGSSVLH5+IfqFDpCFbe3nE5tOgrEskChrO0X1 B08DkhEH/kw3kKuW6cxTReBN3VwcmG3fP6OyIXnFFiBEDiV1gg+pl+A79 wgzuGiWibAjDzMZH/D7OwANCA0e0bM9Ylqdx34lsJcHer7W5QOvk/PJt6 chA9QTE2tL1/ek4m0f5AAeof1Z4iRDCByhMbOtx9oyfCSAxBGFWxkuOmT j9HmjMlgGulf8VYZUHp+uCwqosQXLt5IDJjOa67Kgpl/yfC62YgGPLXjl 6yBqQW/zXO0oE9W826bMVTUqfBJlQmxub2DnlKT5VELa7RtZZz+oVD3AO g==; X-IronPort-AV: E=McAfee;i="6500,9779,10461"; a="297817975" X-IronPort-AV: E=Sophos;i="5.93,293,1654585200"; d="scan'208";a="297817975" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Sep 2022 22:22:07 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.93,293,1654585200"; d="scan'208";a="682267053" Received: from npg-dpdk-xuan-cbdma.sh.intel.com ([10.67.111.163]) by fmsmga004.fm.intel.com with ESMTP; 05 Sep 2022 22:22:05 -0700 From: xuan.ding@intel.com To: maxime.coquelin@redhat.com, chenbo.xia@intel.com Cc: dev@dpdk.org, jiayu.hu@intel.com, xingguang.he@intel.com, yvonnex.yang@intel.com, cheng1.jiang@intel.com, yuanx.wang@intel.com, wenwux.ma@intel.com, Xuan Ding Subject: [PATCH v2 1/2] vhost: introduce DMA vchannel unconfiguration Date: Tue, 6 Sep 2022 05:21:48 +0000 Message-Id: <20220906052149.21033-2-xuan.ding@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220906052149.21033-1-xuan.ding@intel.com> References: <20220814140442.82525-1-xuan.ding@intel.com> <20220906052149.21033-1-xuan.ding@intel.com> 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 From: Xuan Ding This patch adds a new API rte_vhost_async_dma_unconfigure() to unconfigure DMA vchannels in vhost async data path. Lock protection are also added to protect DMA vchannels configuration and unconfiguration from concurrent calls. Signed-off-by: Xuan Ding --- doc/guides/prog_guide/vhost_lib.rst | 5 ++ doc/guides/rel_notes/release_22_11.rst | 2 + lib/vhost/rte_vhost_async.h | 17 +++++++ lib/vhost/version.map | 3 ++ lib/vhost/vhost.c | 69 ++++++++++++++++++++++++-- 5 files changed, 91 insertions(+), 5 deletions(-) diff --git a/doc/guides/prog_guide/vhost_lib.rst b/doc/guides/prog_guide/vhost_lib.rst index bad4d819e1..22764cbeaa 100644 --- a/doc/guides/prog_guide/vhost_lib.rst +++ b/doc/guides/prog_guide/vhost_lib.rst @@ -323,6 +323,11 @@ The following is an overview of some key Vhost API functions: Get device type of vDPA device, such as VDPA_DEVICE_TYPE_NET, VDPA_DEVICE_TYPE_BLK. +* ``rte_vhost_async_dma_unconfigure(dma_id, vchan_id)`` + + Clear DMA vChannels finished to use. This function needs to + be called after the deregisterration of async path has been finished. + Vhost-user Implementations -------------------------- diff --git a/doc/guides/rel_notes/release_22_11.rst b/doc/guides/rel_notes/release_22_11.rst index 8c021cf050..e94c006e39 100644 --- a/doc/guides/rel_notes/release_22_11.rst +++ b/doc/guides/rel_notes/release_22_11.rst @@ -55,6 +55,8 @@ New Features Also, make sure to start the actual text at the margin. ======================================================= +* **Added vhost API to unconfigure DMA vchannels.** + Added an API which helps to unconfigure DMA vchannels. Removed Items ------------- diff --git a/lib/vhost/rte_vhost_async.h b/lib/vhost/rte_vhost_async.h index 1db2a10124..0442e027fd 100644 --- a/lib/vhost/rte_vhost_async.h +++ b/lib/vhost/rte_vhost_async.h @@ -266,6 +266,23 @@ rte_vhost_async_try_dequeue_burst(int vid, uint16_t queue_id, struct rte_mempool *mbuf_pool, struct rte_mbuf **pkts, uint16_t count, int *nr_inflight, int16_t dma_id, uint16_t vchan_id); +/** + * @warning + * @b EXPERIMENTAL: this API may change, or be removed, without prior notice. + * + * Unconfigure DMA vChannels in asynchronous data path. + * + * @param dma_id + * the identifier of DMA device + * @param vchan_id + * the identifier of virtual DMA channel + * @return + * 0 on success, and -1 on failure + */ +__rte_experimental +int +rte_vhost_async_dma_unconfigure(int16_t dma_id, uint16_t vchan_id); + #ifdef __cplusplus } #endif diff --git a/lib/vhost/version.map b/lib/vhost/version.map index 18574346d5..013a6bcc42 100644 --- a/lib/vhost/version.map +++ b/lib/vhost/version.map @@ -96,6 +96,9 @@ EXPERIMENTAL { rte_vhost_async_try_dequeue_burst; rte_vhost_driver_get_vdpa_dev_type; rte_vhost_clear_queue; + + # added in 22.11 + rte_vhost_async_dma_unconfigure; }; INTERNAL { diff --git a/lib/vhost/vhost.c b/lib/vhost/vhost.c index 60cb05a0ff..273616da11 100644 --- a/lib/vhost/vhost.c +++ b/lib/vhost/vhost.c @@ -23,6 +23,7 @@ struct virtio_net *vhost_devices[RTE_MAX_VHOST_DEVICE]; pthread_mutex_t vhost_dev_lock = PTHREAD_MUTEX_INITIALIZER; +static rte_spinlock_t vhost_dma_lock = RTE_SPINLOCK_INITIALIZER; struct vhost_vq_stats_name_off { char name[RTE_VHOST_STATS_NAME_SIZE]; @@ -1870,19 +1871,20 @@ rte_vhost_async_dma_configure(int16_t dma_id, uint16_t vchan_id) void *pkts_cmpl_flag_addr; uint16_t max_desc; + rte_spinlock_lock(&vhost_dma_lock); if (!rte_dma_is_valid(dma_id)) { VHOST_LOG_CONFIG("dma", ERR, "DMA %d is not found.\n", dma_id); - return -1; + goto error; } if (rte_dma_info_get(dma_id, &info) != 0) { VHOST_LOG_CONFIG("dma", ERR, "Fail to get DMA %d information.\n", dma_id); - return -1; + goto error; } if (vchan_id >= info.max_vchans) { VHOST_LOG_CONFIG("dma", ERR, "Invalid DMA %d vChannel %u.\n", dma_id, vchan_id); - return -1; + goto error; } if (!dma_copy_track[dma_id].vchans) { @@ -1894,7 +1896,7 @@ rte_vhost_async_dma_configure(int16_t dma_id, uint16_t vchan_id) VHOST_LOG_CONFIG("dma", ERR, "Failed to allocate vchans for DMA %d vChannel %u.\n", dma_id, vchan_id); - return -1; + goto error; } dma_copy_track[dma_id].vchans = vchans; @@ -1903,6 +1905,7 @@ rte_vhost_async_dma_configure(int16_t dma_id, uint16_t vchan_id) if (dma_copy_track[dma_id].vchans[vchan_id].pkts_cmpl_flag_addr) { VHOST_LOG_CONFIG("dma", INFO, "DMA %d vChannel %u already registered.\n", dma_id, vchan_id); + rte_spinlock_unlock(&vhost_dma_lock); return 0; } @@ -1920,7 +1923,7 @@ rte_vhost_async_dma_configure(int16_t dma_id, uint16_t vchan_id) rte_free(dma_copy_track[dma_id].vchans); dma_copy_track[dma_id].vchans = NULL; } - return -1; + goto error; } dma_copy_track[dma_id].vchans[vchan_id].pkts_cmpl_flag_addr = pkts_cmpl_flag_addr; @@ -1928,7 +1931,12 @@ rte_vhost_async_dma_configure(int16_t dma_id, uint16_t vchan_id) dma_copy_track[dma_id].vchans[vchan_id].ring_mask = max_desc - 1; dma_copy_track[dma_id].nr_vchans++; + rte_spinlock_unlock(&vhost_dma_lock); return 0; + +error: + rte_spinlock_unlock(&vhost_dma_lock); + return -1; } int @@ -2117,5 +2125,56 @@ int rte_vhost_vring_stats_reset(int vid, uint16_t queue_id) return 0; } +int +rte_vhost_async_dma_unconfigure(int16_t dma_id, uint16_t vchan_id) +{ + struct rte_dma_info info; + uint16_t max_desc; + int i; + + rte_spinlock_lock(&vhost_dma_lock); + if (!rte_dma_is_valid(dma_id)) { + VHOST_LOG_CONFIG("dma", ERR, "DMA %d is not found.\n", dma_id); + goto error; + } + + if (rte_dma_info_get(dma_id, &info) != 0) { + VHOST_LOG_CONFIG("dma", ERR, "Fail to get DMA %d information.\n", dma_id); + goto error; + } + + if (vchan_id >= info.max_vchans) { + VHOST_LOG_CONFIG("dma", ERR, "Invalid DMA %d vChannel %u.\n", dma_id, vchan_id); + goto error; + } + + max_desc = info.max_desc; + for (i = 0; i < max_desc; i++) { + if (dma_copy_track[dma_id].vchans[vchan_id].pkts_cmpl_flag_addr[i] != NULL) { + rte_free(dma_copy_track[dma_id].vchans[vchan_id].pkts_cmpl_flag_addr[i]); + dma_copy_track[dma_id].vchans[vchan_id].pkts_cmpl_flag_addr[i] = NULL; + } + } + + if (dma_copy_track[dma_id].vchans[vchan_id].pkts_cmpl_flag_addr != NULL) { + rte_free(dma_copy_track[dma_id].vchans[vchan_id].pkts_cmpl_flag_addr); + dma_copy_track[dma_id].vchans[vchan_id].pkts_cmpl_flag_addr = NULL; + } + + if (dma_copy_track[dma_id].vchans != NULL) { + rte_free(dma_copy_track[dma_id].vchans); + dma_copy_track[dma_id].vchans = NULL; + } + + dma_copy_track[dma_id].nr_vchans--; + + rte_spinlock_unlock(&vhost_dma_lock); + return 0; + +error: + rte_spinlock_unlock(&vhost_dma_lock); + return -1; +} + RTE_LOG_REGISTER_SUFFIX(vhost_config_log_level, config, INFO); RTE_LOG_REGISTER_SUFFIX(vhost_data_log_level, data, WARNING); -- 2.17.1