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From: Jin Yu <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,
	Jin Yu <jin.yu@intel.com>, Lin Li <lilin24@baidu.com>,
	Xun Ni <nixun@baidu.com>, Yu Zhang <zhangyu31@baidu.com>
Subject: [dpdk-dev] [PATCH v8 07/10] vhost: add APIs for user getting inflight ring
Date: Fri, 27 Sep 2019 18:56:21 +0800	[thread overview]
Message-ID: <20190927105624.16313-8-jin.yu@intel.com> (raw)
In-Reply-To: <20190927105624.16313-1-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/rte_vhost_version.map |  2 +
 lib/librte_vhost/vhost.c               | 59 ++++++++++++++++++++++++++
 3 files changed, 101 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/rte_vhost_version.map b/lib/librte_vhost/rte_vhost_version.map
index bc70bfaa5..ce517b127 100644
--- a/lib/librte_vhost/rte_vhost_version.map
+++ b/lib/librte_vhost/rte_vhost_version.map
@@ -93,4 +93,6 @@ EXPERIMENTAL {
 	rte_vhost_set_last_inflight_io_packed;
 	rte_vhost_clr_inflight_desc_split;
 	rte_vhost_clr_inflight_desc_packed;
+	rte_vhost_get_vhost_ring_inflight;
+	rte_vhost_get_vring_base_from_inflight;
 };
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)
 {
-- 
2.17.2


  parent reply	other threads:[~2019-09-27  3:13 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20190920120102.29828>
2019-09-27 10:56 ` [dpdk-dev] [PATCH v8 00/10] vhost: support inflight share memory protocol feature Jin Yu
2019-09-27 10:56   ` [dpdk-dev] [PATCH v8 01/10] vhost: add the inflight description Jin Yu
2019-09-27 10:56   ` [dpdk-dev] [PATCH v8 02/10] vhost: add packed ring Jin Yu
2019-09-27 10:56   ` [dpdk-dev] [PATCH v8 03/10] vhost: add the inflight structure Jin Yu
2019-09-27 10:56   ` [dpdk-dev] [PATCH v8 04/10] vhost: add two new messages to support a shared buffer Jin Yu
2019-10-07 13:08     ` Adrian Moreno
2019-09-27 10:56   ` [dpdk-dev] [PATCH v8 05/10] vhost: checkout the resubmit inflight information Jin Yu
2019-09-27 10:56   ` [dpdk-dev] [PATCH v8 06/10] vhost: add the APIs to operate inflight ring Jin Yu
2019-09-27 10:56   ` Jin Yu [this message]
2019-09-27 10:56   ` [dpdk-dev] [PATCH v8 08/10] vhost: add vring functions packed ring support Jin Yu
2019-09-27 10:56   ` [dpdk-dev] [PATCH v8 09/10] vhost: add an API for judging vq format Jin Yu
2019-09-27 10:56   ` [dpdk-dev] [PATCH v8 10/10] vhost: add vhost-user-blk example which support inflight Jin Yu

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