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 5D639A04B5; Mon, 11 Jan 2021 07:03:35 +0100 (CET) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 5B388140D04; Mon, 11 Jan 2021 07:03:31 +0100 (CET) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by mails.dpdk.org (Postfix) with ESMTP id 446AD140CFE for ; Mon, 11 Jan 2021 07:03:29 +0100 (CET) IronPort-SDR: 0uy0QyW6n7TPTQRQ8DwW4NAKR5Qlv+s6yWBU40uEHKWIJ30Nb6f3SvXxqTe552jusUKH7flNVW Zoul4xoxZ3WQ== X-IronPort-AV: E=McAfee;i="6000,8403,9860"; a="174301417" X-IronPort-AV: E=Sophos;i="5.79,337,1602572400"; d="scan'208";a="174301417" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Jan 2021 22:03:28 -0800 IronPort-SDR: 0MYVub9WRr5EZ7EiauKJlBSzoo/MWkDEPu7YIyMB86iwY9YojDT4PoeDIdOuXOaIjRhf3vxDiT GlEXaiFtb++w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.79,337,1602572400"; d="scan'208";a="464061927" Received: from dpdk_jiangcheng.sh.intel.com ([10.67.119.112]) by fmsmga001.fm.intel.com with ESMTP; 10 Jan 2021 22:03:27 -0800 From: Cheng Jiang To: maxime.coquelin@redhat.com, chenbo.xia@intel.com Cc: dev@dpdk.org, Jiayu.Hu@intel.com, YvonneX.Yang@intel.com, yinan.wang@intel.com, Cheng Jiang , Jiayu Hu Date: Mon, 11 Jan 2021 05:52:51 +0000 Message-Id: <20210111055252.35672-2-Cheng1.jiang@intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210111055252.35672-1-Cheng1.jiang@intel.com> References: <20201218113327.70528-1-Cheng1.jiang@intel.com> <20210111055252.35672-1-Cheng1.jiang@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [dpdk-dev] [PATCH v8 1/2] examples/vhost: add ioat ring space count and check 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" Add ioat ring space count and check, if ioat ring space is not enough for the next async vhost packet enqueue, then just return to prevent enqueue failure. Add rte_ioat_completed_ops() fail handler. Signed-off-by: Cheng Jiang Reviewed-by: Jiayu Hu --- examples/vhost/ioat.c | 24 +++++++++++++----------- 1 file changed, 13 insertions(+), 11 deletions(-) diff --git a/examples/vhost/ioat.c b/examples/vhost/ioat.c index 71d8a1f1f..dbad28d43 100644 --- a/examples/vhost/ioat.c +++ b/examples/vhost/ioat.c @@ -17,6 +17,7 @@ struct packet_tracker { unsigned short next_read; unsigned short next_write; unsigned short last_remain; + unsigned short ioat_space; }; struct packet_tracker cb_tracker[MAX_VHOST_DEVICE]; @@ -113,7 +114,7 @@ open_ioat(const char *value) goto out; } rte_rawdev_start(dev_id); - + cb_tracker[dev_id].ioat_space = IOAT_RING_SIZE; dma_info->nr++; i++; } @@ -140,13 +141,9 @@ ioat_transfer_data_cb(int vid, uint16_t queue_id, src = descs[i_desc].src; dst = descs[i_desc].dst; i_seg = 0; + if (cb_tracker[dev_id].ioat_space < src->nr_segs) + break; while (i_seg < src->nr_segs) { - /* - * TODO: Assuming that the ring space of the - * IOAT device is large enough, so there is no - * error here, and the actual error handling - * will be added later. - */ rte_ioat_enqueue_copy(dev_id, (uintptr_t)(src->iov[i_seg].iov_base) + src->offset, @@ -158,7 +155,8 @@ ioat_transfer_data_cb(int vid, uint16_t queue_id, i_seg++; } write &= mask; - cb_tracker[dev_id].size_track[write] = i_seg; + cb_tracker[dev_id].size_track[write] = src->nr_segs; + cb_tracker[dev_id].ioat_space -= src->nr_segs; write++; } } else { @@ -178,17 +176,21 @@ ioat_check_completed_copies_cb(int vid, uint16_t queue_id, { if (!opaque_data) { uintptr_t dump[255]; - unsigned short n_seg; + int n_seg; unsigned short read, write; unsigned short nb_packet = 0; unsigned short mask = MAX_ENQUEUED_SIZE - 1; unsigned short i; + int dev_id = dma_bind[vid].dmas[queue_id * 2 + VIRTIO_RXQ].dev_id; n_seg = rte_ioat_completed_ops(dev_id, 255, dump, dump); - n_seg += cb_tracker[dev_id].last_remain; - if (!n_seg) + if (n_seg <= 0) return 0; + + cb_tracker[dev_id].ioat_space += n_seg; + n_seg += cb_tracker[dev_id].last_remain; + read = cb_tracker[dev_id].next_read; write = cb_tracker[dev_id].next_write; for (i = 0; i < max_packets; i++) { -- 2.29.2