From patchwork Tue Sep 17 14:52:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jin Yu X-Patchwork-Id: 59294 Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 24AF91BFD8; Tue, 17 Sep 2019 09:09:45 +0200 (CEST) Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by dpdk.org (Postfix) with ESMTP id 3E51F1BFCC for ; Tue, 17 Sep 2019 09:09:43 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 17 Sep 2019 00:09:42 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,515,1559545200"; d="scan'208";a="180682422" Received: from storage36.sh.intel.com ([10.67.110.166]) by orsmga008.jf.intel.com with ESMTP; 17 Sep 2019 00:09:40 -0700 From: JinYu To: dev@dpdk.org Cc: changpeng.liu@intel.com, maxime.coquelin@redhat.com, tiwei.bie@intel.com, zhihong.wang@intel.com, JinYu , Lin Li , Xun Ni , Yu Zhang Date: Tue, 17 Sep 2019 22:52:30 +0800 Message-Id: <20190917145234.16951-8-jin.yu@intel.com> X-Mailer: git-send-email 2.17.2 In-Reply-To: <20190917145234.16951-1-jin.yu@intel.com> References: <20190829141224.49700> <20190917145234.16951-1-jin.yu@intel.com> Subject: [dpdk-dev] [PATCH v7 07/11] vhost: add APIs for user getting inflight ring X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 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 introduces two APIs. one is for getting inflgiht ring and the other is for getting base. Signed-off-by: Lin Li Signed-off-by: Xun Ni Signed-off-by: Yu Zhang Signed-off-by: Jin Yu --- lib/librte_vhost/rte_vhost.h | 40 ++++++++++++++++++++++++ lib/librte_vhost/vhost.c | 59 ++++++++++++++++++++++++++++++++++++ 2 files changed, 99 insertions(+) diff --git a/lib/librte_vhost/rte_vhost.h b/lib/librte_vhost/rte_vhost.h index f0e86f5e2..8b6435d0d 100644 --- a/lib/librte_vhost/rte_vhost.h +++ b/lib/librte_vhost/rte_vhost.h @@ -693,6 +693,23 @@ int rte_vhost_get_mem_table(int vid, struct rte_vhost_memory **mem); int rte_vhost_get_vhost_vring(int vid, uint16_t vring_idx, struct rte_vhost_vring *vring); +/** + * Get guest inflight vring info, including inflight ring and resubmit list. + * + * @param vid + * vhost device ID + * @param vring_idx + * vring index + * @param vring + * the structure to hold the requested inflight vring info + * @return + * 0 on success, -1 on failure + */ +__rte_experimental +int +rte_vhost_get_vhost_ring_inflight(int vid, uint16_t vring_idx, + struct rte_vhost_ring_inflight *vring); + /** * Set split inflight descriptor. * @@ -867,6 +884,29 @@ int __rte_experimental rte_vhost_get_vring_base(int vid, uint16_t queue_id, uint16_t *last_avail_idx, uint16_t *last_used_idx); +/** + * Get last_avail/last_used of the vhost virtqueue + * + * This function is designed for the reconnection and it's specific for + * the packed ring as we can get the two parameters from the inflight + * queueregion + * + * @param vid + * vhost device ID + * @param queue_id + * vhost queue index + * @param last_avail_idx + * vhost last_avail_idx to get + * @param last_used_idx + * vhost last_used_idx to get + * @return + * 0 on success, -1 on failure + */ +__rte_experimental +int +rte_vhost_get_vring_base_from_inflight(int vid, + uint16_t queue_id, uint16_t *last_avail_idx, uint16_t *last_used_idx); + /** * Set last_avail/used_idx of the vhost virtqueue * diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c index 44ae87d4f..95f99ea51 100644 --- a/lib/librte_vhost/vhost.c +++ b/lib/librte_vhost/vhost.c @@ -783,6 +783,41 @@ rte_vhost_get_vhost_vring(int vid, uint16_t vring_idx, return 0; } +int +rte_vhost_get_vhost_ring_inflight(int vid, uint16_t vring_idx, + struct rte_vhost_ring_inflight *vring) +{ + struct virtio_net *dev; + struct vhost_virtqueue *vq; + + dev = get_device(vid); + if (unlikely(!dev)) + return -1; + + if (vring_idx >= VHOST_MAX_VRING) + return -1; + + vq = dev->virtqueue[vring_idx]; + if (unlikely(!vq)) + return -1; + + if (vq_is_packed(dev)) { + if (unlikely(!vq->inflight_packed)) + return -1; + + vring->inflight_packed = vq->inflight_packed; + } else { + if (unlikely(!vq->inflight_split)) + return -1; + + vring->inflight_split = vq->inflight_split; + } + + vring->resubmit_inflight = vq->resubmit_inflight; + + return 0; +} + int rte_vhost_set_inflight_desc_split(int vid, uint16_t vring_idx, uint16_t idx) @@ -1249,6 +1284,30 @@ int rte_vhost_get_vring_base(int vid, uint16_t queue_id, return 0; } +int +rte_vhost_get_vring_base_from_inflight(int vid, + uint16_t queue_id, uint16_t *last_avail_idx, uint16_t *last_used_idx) +{ + struct rte_vhost_inflight_info_packed *inflight_info; + struct virtio_net *dev = get_device(vid); + + if (dev == NULL || last_avail_idx == NULL || last_used_idx == NULL) + return -1; + + if (!vq_is_packed(dev)) + return -1; + + inflight_info = dev->virtqueue[queue_id]->inflight_packed; + if (!inflight_info) + return -1; + + *last_avail_idx = (inflight_info->old_used_wrap_counter << 15) | + inflight_info->old_used_idx; + *last_used_idx = *last_avail_idx; + + return 0; +} + int rte_vhost_set_vring_base(int vid, uint16_t queue_id, uint16_t last_avail_idx, uint16_t last_used_idx) {