From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yuanhan Liu Subject: [PATCH v2 07/22] vhost: export vhost vring info Date: Thu, 23 Mar 2017 15:10:44 +0800 Message-ID: <1490253059-28112-8-git-send-email-yuanhan.liu@linux.intel.com> References: <1488534682-3494-1-git-send-email-yuanhan.liu@linux.intel.com> <1490253059-28112-1-git-send-email-yuanhan.liu@linux.intel.com> Cc: Maxime Coquelin , Harris James R , Liu Changpeng , Yuanhan Liu To: dev@dpdk.org Return-path: Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by dpdk.org (Postfix) with ESMTP id 0C8C91094 for ; Thu, 23 Mar 2017 08:13:09 +0100 (CET) In-Reply-To: <1490253059-28112-1-git-send-email-yuanhan.liu@linux.intel.com> List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Signed-off-by: Yuanhan Liu --- v2: - fix off-by-one check - add API comments --- lib/librte_vhost/rte_vhost_version.map | 1 + lib/librte_vhost/rte_virtio_net.h | 26 ++++++++++++++++++++++++++ lib/librte_vhost/vhost.c | 30 ++++++++++++++++++++++++++++++ lib/librte_vhost/vhost.h | 2 ++ 4 files changed, 59 insertions(+) diff --git a/lib/librte_vhost/rte_vhost_version.map b/lib/librte_vhost/rte_vhost_version.map index e21b788..28664a4 100644 --- a/lib/librte_vhost/rte_vhost_version.map +++ b/lib/librte_vhost/rte_vhost_version.map @@ -39,5 +39,6 @@ DPDK_17.05 { rte_vhost_get_mtu; rte_vhost_get_negotiated_features rte_vhost_get_vhost_memory; + rte_vhost_get_vhost_vring; } DPDK_16.07; diff --git a/lib/librte_vhost/rte_virtio_net.h b/lib/librte_vhost/rte_virtio_net.h index 57e57e3..5142337 100644 --- a/lib/librte_vhost/rte_virtio_net.h +++ b/lib/librte_vhost/rte_virtio_net.h @@ -80,6 +80,17 @@ struct rte_vhost_memory { struct rte_vhost_mem_region regions[0]; }; +struct rte_vhost_vring { + struct vring_desc *desc; + struct vring_avail *avail; + struct vring_used *used; + uint64_t log_guest_addr; + + int callfd; + int kickfd; + uint16_t size; +}; + /** * Device and vring operations. */ @@ -292,4 +303,19 @@ uint16_t rte_vhost_dequeue_burst(int vid, uint16_t queue_id, */ int rte_vhost_get_mem_table(int vid, struct rte_vhost_memory **mem); +/** + * Get guest vring info, including the vring address, vring size, etc. + * + * @param vid + * vhost device ID + * @param vring_idx + * vring index + * @param vring + * the structure to hold the requested vring info + * @return + * 0 on success, -1 on failure + */ +int rte_vhost_get_vhost_vring(int vid, uint16_t vring_idx, + struct rte_vhost_vring *vring); + #endif /* _VIRTIO_NET_H_ */ diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c index 08dccfb..6fe613b 100644 --- a/lib/librte_vhost/vhost.c +++ b/lib/librte_vhost/vhost.c @@ -394,6 +394,36 @@ struct virtio_net * return 0; } +int +rte_vhost_get_vhost_vring(int vid, uint16_t vring_idx, + struct rte_vhost_vring *vring) +{ + struct virtio_net *dev; + struct vhost_virtqueue *vq; + + dev = get_device(vid); + if (!dev) + return -1; + + if (vring_idx >= VHOST_MAX_VRING) + return -1; + + vq = dev->virtqueue[vring_idx]; + if (!vq) + return -1; + + vring->desc = vq->desc; + vring->avail = vq->avail; + vring->used = vq->used; + vring->log_guest_addr = vq->log_guest_addr; + + vring->callfd = vq->callfd; + vring->kickfd = vq->kickfd; + vring->size = vq->size; + + return 0; +} + uint16_t rte_vhost_avail_entries(int vid, uint16_t queue_id) { diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h index 6d1986a..68ca197 100644 --- a/lib/librte_vhost/vhost.h +++ b/lib/librte_vhost/vhost.h @@ -120,6 +120,8 @@ struct vhost_virtqueue { #ifndef VIRTIO_NET_F_MQ #define VIRTIO_NET_F_MQ 22 #endif + +#define VHOST_MAX_VRING 0x100 #define VHOST_MAX_QUEUE_PAIRS 0x80 #ifndef VIRTIO_NET_F_MTU -- 1.9.0