From 4d891f77ddfaf9fbdaaf97a5d6269cffd94b8b9b Mon Sep 17 00:00:00 2001 From: Jin Yu Date: Thu, 10 Oct 2019 04:48:35 +0800 Subject: [PATCH] vhost: add APIs to get inflight ring 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 Reviewed-by: Maxime Coquelin --- lib/librte_vhost/rte_vhost.h | 40 +++++++++++++++++ lib/librte_vhost/rte_vhost_version.map | 2 + lib/librte_vhost/vhost.c | 61 ++++++++++++++++++++++++++ 3 files changed, 103 insertions(+) diff --git a/lib/librte_vhost/rte_vhost.h b/lib/librte_vhost/rte_vhost.h index a3df61270b..140d79ce5e 100644 --- a/lib/librte_vhost/rte_vhost.h +++ b/lib/librte_vhost/rte_vhost.h @@ -709,6 +709,23 @@ 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. * @@ -885,6 +902,29 @@ int 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 bc70bfaa50..ce517b1271 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 7b07c8ab60..a8ef55d627 100644 --- a/lib/librte_vhost/vhost.c +++ b/lib/librte_vhost/vhost.c @@ -823,6 +823,41 @@ 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) @@ -1318,6 +1353,32 @@ 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) { -- 2.20.1