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From: JinYu <jin.yu@intel.com>
To: dev@dpdk.org
Cc: changpeng.liu@intel.com, maxime.coquelin@redhat.com,
	tiwei.bie@intel.com, zhihong.wang@intel.com,
	JinYu <jin.yu@intel.com>, Lin Li <lilin24@baidu.com>,
	Xun Ni <nixun@baidu.com>, Yu Zhang <zhangyu31@baidu.com>
Subject: [dpdk-dev] [PATCH v6 07/10] vhost: add APIs for user getting inflight ring
Date: Thu, 29 Aug 2019 22:12:21 +0800
Message-ID: <20190829141224.49700-8-jin.yu@intel.com> (raw)
In-Reply-To: <20190829141224.49700-1-jin.yu@intel.com>

This patch introduces two APIs. one is for getting inflgiht
ring and the other is for getting base.

Signed-off-by: Lin Li <lilin24@baidu.com>
Signed-off-by: Xun Ni <nixun@baidu.com>
Signed-off-by: Yu Zhang <zhangyu31@baidu.com>
Signed-off-by: Jin Yu <jin.yu@intel.com>
---
 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 d3b6eda21..dbe445e73 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 58940152f..2cc2793c4 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)
@@ -1229,6 +1264,30 @@ 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 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)
 {
-- 
2.17.2


  parent reply index

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20190806182500.22320>
2019-08-29 14:12 ` [dpdk-dev] [PATCH v6 00/10] vhost: support inflight share memory protocol feature JinYu
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 01/10] vhost: add the inflight description JinYu
2019-09-06 16:37     ` Maxime Coquelin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 02/10] vhost: add packed ring JinYu
2019-09-06 16:42     ` Maxime Coquelin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 03/10] vhost: add the inflight structure JinYu
2019-09-06 16:45     ` Maxime Coquelin
2019-09-09  3:04       ` Yu, Jin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 04/10] vhost: add two new messages to support a shared buffer JinYu
2019-09-06 17:22     ` Maxime Coquelin
2019-09-09  3:06       ` Yu, Jin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 05/10] vhost: checkout and cleanup the resubmit inflight information JinYu
2019-09-09 10:20     ` Maxime Coquelin
2019-09-11  2:50       ` Yu, Jin
2019-09-11  8:43         ` Maxime Coquelin
2019-09-11  9:07           ` Yu, Jin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 06/10] vhost: add the APIs to operate inflight ring JinYu
2019-09-11 13:19     ` Kevin Traynor
2019-09-12  9:26     ` Maxime Coquelin
2019-09-16  1:21       ` Yu, Jin
2019-08-29 14:12   ` JinYu [this message]
2019-09-12  9:28     ` [dpdk-dev] [PATCH v6 07/10] vhost: add APIs for user getting " Maxime Coquelin
2019-09-16  1:20       ` Yu, Jin
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 08/10] vhost: fix vring functions to support packed ring JinYu
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 09/10] vhost: add an API for judging vq format JinYu
2019-08-29 14:12   ` [dpdk-dev] [PATCH v6 10/10] vhost: add vhost-user-blk example which support inflight JinYu
2019-08-30  6:07   ` [dpdk-dev] [PATCH v6 00/10] vhost: support inflight share memory protocol feature Gavin Hu (Arm Technology China)
2019-09-06 16:35   ` Maxime Coquelin
2019-09-09  4:51     ` Yu, Jin

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