From patchwork Tue Sep 17 14:52:29 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jin Yu X-Patchwork-Id: 59293 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 399E11BFE1; Tue, 17 Sep 2019 09:09:41 +0200 (CEST) Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by dpdk.org (Postfix) with ESMTP id E578E1BFCD for ; Tue, 17 Sep 2019 09:09:39 +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 00:09:39 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,515,1559545200"; d="scan'208";a="180682416" Received: from storage36.sh.intel.com ([10.67.110.166]) by orsmga008.jf.intel.com with ESMTP; 17 Sep 2019 00:09:37 -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 22:52:29 +0800 Message-Id: <20190917145234.16951-7-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 06/11] vhost: add the APIs to operate 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 three APIs to operate the inflight ring. Three APIs are set, set last and clear. It includes split and packed ring. 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 | 116 +++++++++++++++ lib/librte_vhost/vhost.c | 272 +++++++++++++++++++++++++++++++++++ 2 files changed, 388 insertions(+) diff --git a/lib/librte_vhost/rte_vhost.h b/lib/librte_vhost/rte_vhost.h index 6ac738730..f0e86f5e2 100644 --- a/lib/librte_vhost/rte_vhost.h +++ b/lib/librte_vhost/rte_vhost.h @@ -693,6 +693,122 @@ 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); +/** + * Set split inflight descriptor. + * + * This function save descriptors that has been comsumed in available + * ring + * + * @param vid + * vhost device ID + * @param vring_idx + * vring index + * @param idx + * inflight entry index + * @return + * 0 on success, -1 on failure + */ +__rte_experimental +int +rte_vhost_set_inflight_desc_split(int vid, uint16_t vring_idx, + uint16_t idx); + +/** + * Set packed inflight descriptor and get corresponding inflight entry + * + * This function save descriptors that has been comsumed + * + * @param vid + * vhost device ID + * @param vring_idx + * vring index + * @param head + * head of descriptors + * @param last + * last of descriptors + * @param inflight_entry + * corresponding inflight entry + * @return + * 0 on success, -1 on failure + */ +__rte_experimental +int +rte_vhost_set_inflight_desc_packed(int vid, uint16_t vring_idx, + uint16_t head, uint16_t last, uint16_t *inflight_entry); + +/** + * Save the head of list that the last batch of used descriptors. + * + * @param vid + * vhost device ID + * @param vring_idx + * vring index + * @param idx + * descriptor entry index + * @return + * 0 on success, -1 on failure + */ +__rte_experimental +int +rte_vhost_set_last_inflight_io_split(int vid, + uint16_t vring_idx, uint16_t idx); + +/** + * Update the inflight free_head, used_idx and used_wrap_counter. + * + * This function will update status first before updating descriptors + * to used + * + * @param vid + * vhost device ID + * @param vring_idx + * vring index + * @param head + * head of descriptors + * @return + * 0 on success, -1 on failure + */ +__rte_experimental +int +rte_vhost_set_last_inflight_io_packed(int vid, + uint16_t vring_idx, uint16_t head); + +/** + * Clear the split inflight status. + * + * @param vid + * vhost device ID + * @param vring_idx + * vring index + * @param last_used_idx + * last used idx of used ring + * @param idx + * inflight entry index + * @return + * 0 on success, -1 on failure + */ +__rte_experimental +int +rte_vhost_clr_inflight_desc_split(int vid, uint16_t vring_idx, + uint16_t last_used_idx, uint16_t idx); + +/** + * Clear the packed inflight status. + * + * @param vid + * vhost device ID + * @param vring_idx + * vring index + * @param head + * inflight entry index + * @return + * 0 on success, -1 on failure + */ +__rte_experimental +int +rte_vhost_clr_inflight_desc_packed(int vid, uint16_t vring_idx, + uint16_t head); + /** * Notify the guest that used descriptors have been added to the vring. This * function acts as a memory barrier. diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c index 660ac2a07..44ae87d4f 100644 --- a/lib/librte_vhost/vhost.c +++ b/lib/librte_vhost/vhost.c @@ -783,6 +783,278 @@ rte_vhost_get_vhost_vring(int vid, uint16_t vring_idx, return 0; } +int +rte_vhost_set_inflight_desc_split(int vid, uint16_t vring_idx, + uint16_t idx) +{ + struct virtio_net *dev; + struct vhost_virtqueue *vq; + + dev = get_device(vid); + if (unlikely(!dev)) + return -1; + + if (unlikely(!(dev->protocol_features & + (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))) + return 0; + + if (unlikely(vq_is_packed(dev))) + return -1; + + if (unlikely(vring_idx >= VHOST_MAX_VRING)) + return -1; + + vq = dev->virtqueue[vring_idx]; + if (unlikely(!vq)) + return -1; + + if (unlikely(!vq->inflight_split)) + return -1; + + if (unlikely(idx >= vq->size)) + return -1; + + vq->inflight_split->desc[idx].counter = vq->global_counter++; + vq->inflight_split->desc[idx].inflight = 1; + return 0; +} + +int +rte_vhost_set_inflight_desc_packed(int vid, uint16_t vring_idx, + uint16_t head, uint16_t last, uint16_t *inflight_entry) +{ + struct virtio_net *dev; + struct vhost_virtqueue *vq; + struct rte_vhost_inflight_info_packed *inflight_info; + struct vring_packed_desc *desc; + uint16_t old_free_head, free_head; + + dev = get_device(vid); + if (unlikely(!dev)) + return -1; + + if (unlikely(!(dev->protocol_features & + (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))) + return 0; + + if (unlikely(!vq_is_packed(dev))) + return -1; + + if (unlikely(vring_idx >= VHOST_MAX_VRING)) + return -1; + + vq = dev->virtqueue[vring_idx]; + if (unlikely(!vq)) + return -1; + + inflight_info = vq->inflight_packed; + if (unlikely(!inflight_info)) + return -1; + + if (unlikely(head >= vq->size)) + return -1; + + desc = vq->desc_packed; + old_free_head = inflight_info->old_free_head; + if (unlikely(old_free_head >= vq->size)) + return -1; + + free_head = old_free_head; + + /* init header descriptor */ + inflight_info->desc[old_free_head].num = 0; + inflight_info->desc[old_free_head].counter = vq->global_counter++; + inflight_info->desc[old_free_head].inflight = 1; + + /* save desc entry in flight entry */ + while (head != ((last + 1) % vq->size)) { + inflight_info->desc[old_free_head].num++; + inflight_info->desc[free_head].addr = desc[head].addr; + inflight_info->desc[free_head].len = desc[head].len; + inflight_info->desc[free_head].flags = desc[head].flags; + inflight_info->desc[free_head].id = desc[head].id; + + inflight_info->desc[old_free_head].last = free_head; + free_head = inflight_info->desc[free_head].next; + inflight_info->free_head = free_head; + head = (head + 1) % vq->size; + } + + inflight_info->old_free_head = free_head; + *inflight_entry = old_free_head; + + return 0; +} + +int +rte_vhost_clr_inflight_desc_split(int vid, uint16_t vring_idx, + uint16_t last_used_idx, uint16_t idx) +{ + struct virtio_net *dev; + struct vhost_virtqueue *vq; + + dev = get_device(vid); + if (unlikely(!dev)) + return -1; + + if (unlikely(!(dev->protocol_features & + (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))) + return 0; + + if (unlikely(vq_is_packed(dev))) + return -1; + + if (unlikely(vring_idx >= VHOST_MAX_VRING)) + return -1; + + vq = dev->virtqueue[vring_idx]; + if (unlikely(!vq)) + return -1; + + if (unlikely(!vq->inflight_split)) + return -1; + + if (unlikely(idx >= vq->size)) + return -1; + + rte_compiler_barrier(); + + vq->inflight_split->desc[idx].inflight = 0; + + rte_compiler_barrier(); + + vq->inflight_split->used_idx = last_used_idx; + return 0; +} + +int +rte_vhost_clr_inflight_desc_packed(int vid, uint16_t vring_idx, + uint16_t head) +{ + struct virtio_net *dev; + struct vhost_virtqueue *vq; + struct rte_vhost_inflight_info_packed *inflight_info; + + dev = get_device(vid); + if (unlikely(!dev)) + return -1; + + if (unlikely(!(dev->protocol_features & + (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))) + return 0; + + if (unlikely(!vq_is_packed(dev))) + return -1; + + if (unlikely(vring_idx >= VHOST_MAX_VRING)) + return -1; + + vq = dev->virtqueue[vring_idx]; + if (unlikely(!vq)) + return -1; + + inflight_info = vq->inflight_packed; + if (unlikely(!inflight_info)) + return -1; + + if (unlikely(head >= vq->size)) + return -1; + + rte_compiler_barrier(); + + inflight_info->desc[head].inflight = 0; + + rte_compiler_barrier(); + + inflight_info->old_free_head = inflight_info->free_head; + inflight_info->old_used_idx = inflight_info->used_idx; + inflight_info->old_used_wrap_counter = inflight_info->used_wrap_counter; + + return 0; +} + +int +rte_vhost_set_last_inflight_io_split(int vid, uint16_t vring_idx, + uint16_t idx) +{ + struct virtio_net *dev; + struct vhost_virtqueue *vq; + + dev = get_device(vid); + if (unlikely(!dev)) + return -1; + + if (unlikely(!(dev->protocol_features & + (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))) + return 0; + + if (unlikely(vq_is_packed(dev))) + return -1; + + if (unlikely(vring_idx >= VHOST_MAX_VRING)) + return -1; + + vq = dev->virtqueue[vring_idx]; + if (unlikely(!vq)) + return -1; + + if (unlikely(!vq->inflight_split)) + return -1; + + vq->inflight_split->last_inflight_io = idx; + return 0; +} + +int +rte_vhost_set_last_inflight_io_packed(int vid, uint16_t vring_idx, + uint16_t head) +{ + struct virtio_net *dev; + struct vhost_virtqueue *vq; + struct rte_vhost_inflight_info_packed *inflight_info; + uint16_t last; + + dev = get_device(vid); + if (unlikely(!dev)) + return -1; + + if (unlikely(!(dev->protocol_features & + (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))) + return 0; + + if (unlikely(!vq_is_packed(dev))) + return -1; + + if (unlikely(vring_idx >= VHOST_MAX_VRING)) + return -1; + + vq = dev->virtqueue[vring_idx]; + if (unlikely(!vq)) + return -1; + + inflight_info = vq->inflight_packed; + if (unlikely(!inflight_info)) + return -1; + + if (unlikely(head >= vq->size)) + return -1; + + last = inflight_info->desc[head].last; + if (unlikely(last >= vq->size)) + return -1; + + inflight_info->desc[last].next = inflight_info->free_head; + inflight_info->free_head = head; + inflight_info->used_idx += inflight_info->desc[head].num; + if (inflight_info->used_idx >= inflight_info->desc_num) { + inflight_info->used_idx -= inflight_info->desc_num; + inflight_info->used_wrap_counter = + !inflight_info->used_wrap_counter; + } + + return 0; +} + int rte_vhost_vring_call(int vid, uint16_t vring_idx) {