From: Xuan Zhuo <xuanzhuo@linux.alibaba.com> To: virtualization@lists.linux-foundation.org Cc: Xuan Zhuo <xuanzhuo@linux.alibaba.com>, Jesper Dangaard Brouer <hawk@kernel.org>, Daniel Borkmann <daniel@iogearbox.net>, "Michael S. Tsirkin" <mst@redhat.com>, netdev@vger.kernel.org, John Fastabend <john.fastabend@gmail.com>, Alexei Starovoitov <ast@kernel.org>, Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>, bpf@vger.kernel.org, Paolo Abeni <pabeni@redhat.com>, "David S. Miller" <davem@davemloft.net> Subject: [PATCH vhost v10 08/10] virtio_ring: introduce virtqueue_dma_dev() Date: Fri, 2 Jun 2023 17:22:04 +0800 [thread overview] Message-ID: <20230602092206.50108-9-xuanzhuo@linux.alibaba.com> (raw) In-Reply-To: <20230602092206.50108-1-xuanzhuo@linux.alibaba.com> Added virtqueue_dma_dev() to get DMA device for virtio. Then the caller can do dma operation in advance. The purpose is to keep memory mapped across multiple add/get buf operations. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> --- drivers/virtio/virtio_ring.c | 17 +++++++++++++++++ include/linux/virtio.h | 2 ++ 2 files changed, 19 insertions(+) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 6771b9661798..56444f872967 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -2459,6 +2459,23 @@ int virtqueue_add_inbuf_ctx(struct virtqueue *vq, } EXPORT_SYMBOL_GPL(virtqueue_add_inbuf_ctx); +/** + * virtqueue_dma_dev - get the dma dev + * @_vq: the struct virtqueue we're talking about. + * + * Returns the dma dev. That can been used for dma api. + */ +struct device *virtqueue_dma_dev(struct virtqueue *_vq) +{ + struct vring_virtqueue *vq = to_vvq(_vq); + + if (vq->use_dma_api) + return vring_dma_dev(vq); + else + return NULL; +} +EXPORT_SYMBOL_GPL(virtqueue_dma_dev); + /** * virtqueue_kick_prepare - first half of split virtqueue_kick call. * @_vq: the struct virtqueue diff --git a/include/linux/virtio.h b/include/linux/virtio.h index 0a11c5b32fe5..b24f0a665390 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -78,6 +78,8 @@ int virtqueue_add_sgs(struct virtqueue *vq, void *data, gfp_t gfp); +struct device *virtqueue_dma_dev(struct virtqueue *vq); + bool virtqueue_kick(struct virtqueue *vq); bool virtqueue_kick_prepare(struct virtqueue *vq); -- 2.32.0.3.g01195cf9f _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
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From: Xuan Zhuo <xuanzhuo@linux.alibaba.com> To: virtualization@lists.linux-foundation.org Cc: "Michael S. Tsirkin" <mst@redhat.com>, Jason Wang <jasowang@redhat.com>, Xuan Zhuo <xuanzhuo@linux.alibaba.com>, "David S. Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>, Alexei Starovoitov <ast@kernel.org>, Daniel Borkmann <daniel@iogearbox.net>, Jesper Dangaard Brouer <hawk@kernel.org>, John Fastabend <john.fastabend@gmail.com>, netdev@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH vhost v10 08/10] virtio_ring: introduce virtqueue_dma_dev() Date: Fri, 2 Jun 2023 17:22:04 +0800 [thread overview] Message-ID: <20230602092206.50108-9-xuanzhuo@linux.alibaba.com> (raw) In-Reply-To: <20230602092206.50108-1-xuanzhuo@linux.alibaba.com> Added virtqueue_dma_dev() to get DMA device for virtio. Then the caller can do dma operation in advance. The purpose is to keep memory mapped across multiple add/get buf operations. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> --- drivers/virtio/virtio_ring.c | 17 +++++++++++++++++ include/linux/virtio.h | 2 ++ 2 files changed, 19 insertions(+) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 6771b9661798..56444f872967 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -2459,6 +2459,23 @@ int virtqueue_add_inbuf_ctx(struct virtqueue *vq, } EXPORT_SYMBOL_GPL(virtqueue_add_inbuf_ctx); +/** + * virtqueue_dma_dev - get the dma dev + * @_vq: the struct virtqueue we're talking about. + * + * Returns the dma dev. That can been used for dma api. + */ +struct device *virtqueue_dma_dev(struct virtqueue *_vq) +{ + struct vring_virtqueue *vq = to_vvq(_vq); + + if (vq->use_dma_api) + return vring_dma_dev(vq); + else + return NULL; +} +EXPORT_SYMBOL_GPL(virtqueue_dma_dev); + /** * virtqueue_kick_prepare - first half of split virtqueue_kick call. * @_vq: the struct virtqueue diff --git a/include/linux/virtio.h b/include/linux/virtio.h index 0a11c5b32fe5..b24f0a665390 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -78,6 +78,8 @@ int virtqueue_add_sgs(struct virtqueue *vq, void *data, gfp_t gfp); +struct device *virtqueue_dma_dev(struct virtqueue *vq); + bool virtqueue_kick(struct virtqueue *vq); bool virtqueue_kick_prepare(struct virtqueue *vq); -- 2.32.0.3.g01195cf9f
next prev parent reply other threads:[~2023-06-02 9:22 UTC|newest] Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-06-02 9:21 [PATCH vhost v10 00/10] virtio core prepares for AF_XDP Xuan Zhuo 2023-06-02 9:21 ` Xuan Zhuo 2023-06-02 9:21 ` [PATCH vhost v10 01/10] virtio_ring: put mapping error check in vring_map_one_sg Xuan Zhuo 2023-06-02 9:21 ` Xuan Zhuo 2023-06-27 8:03 ` Jason Wang 2023-06-27 8:03 ` Jason Wang 2023-06-02 9:21 ` [PATCH vhost v10 02/10] virtio_ring: introduce virtqueue_set_premapped() Xuan Zhuo 2023-06-02 9:21 ` Xuan Zhuo 2023-06-27 8:03 ` Jason Wang 2023-06-27 8:03 ` Jason Wang 2023-06-27 8:50 ` Xuan Zhuo 2023-06-27 8:50 ` Xuan Zhuo 2023-06-27 14:56 ` Michael S. Tsirkin 2023-06-27 14:56 ` Michael S. Tsirkin 2023-06-28 1:34 ` Xuan Zhuo 2023-06-28 1:34 ` Xuan Zhuo 2023-06-02 9:21 ` [PATCH vhost v10 03/10] virtio_ring: split: support add premapped buf Xuan Zhuo 2023-06-02 9:21 ` Xuan Zhuo 2023-06-27 8:03 ` Jason Wang 2023-06-27 8:03 ` Jason Wang 2023-06-27 9:01 ` Xuan Zhuo 2023-06-27 9:01 ` Xuan Zhuo 2023-06-28 4:07 ` Jason Wang 2023-06-28 6:00 ` Xuan Zhuo 2023-06-28 6:51 ` Jason Wang 2023-06-02 9:22 ` [PATCH vhost v10 04/10] virtio_ring: packed: " Xuan Zhuo 2023-06-02 9:22 ` Xuan Zhuo 2023-06-27 8:03 ` Jason Wang 2023-06-27 8:03 ` Jason Wang 2023-06-27 9:05 ` Xuan Zhuo 2023-06-27 9:05 ` Xuan Zhuo 2023-06-02 9:22 ` [PATCH vhost v10 05/10] virtio_ring: split-detach: support return dma info to driver Xuan Zhuo 2023-06-02 9:22 ` Xuan Zhuo 2023-06-22 19:36 ` Michael S. Tsirkin 2023-06-22 19:36 ` Michael S. Tsirkin 2023-06-25 2:10 ` Xuan Zhuo 2023-06-25 2:10 ` Xuan Zhuo 2023-06-27 8:03 ` Jason Wang 2023-06-27 8:03 ` Jason Wang 2023-06-27 9:21 ` Xuan Zhuo 2023-06-27 9:21 ` Xuan Zhuo 2023-06-02 9:22 ` [PATCH vhost v10 06/10] virtio_ring: packed-detach: " Xuan Zhuo 2023-06-02 9:22 ` Xuan Zhuo 2023-06-02 11:40 ` Michael S. Tsirkin 2023-06-02 11:40 ` Michael S. Tsirkin 2023-06-02 9:22 ` [PATCH vhost v10 07/10] virtio_ring: introduce helpers for premapped Xuan Zhuo 2023-06-02 9:22 ` Xuan Zhuo 2023-06-04 13:45 ` Michael S. Tsirkin 2023-06-04 13:45 ` Michael S. Tsirkin 2023-06-05 2:06 ` Xuan Zhuo 2023-06-05 2:06 ` Xuan Zhuo 2023-06-05 5:38 ` Michael S. Tsirkin 2023-06-05 5:38 ` Michael S. Tsirkin 2023-06-06 2:01 ` Xuan Zhuo 2023-06-06 2:01 ` Xuan Zhuo 2023-06-22 19:29 ` Michael S. Tsirkin 2023-06-22 19:29 ` Michael S. Tsirkin 2023-06-02 9:22 ` Xuan Zhuo [this message] 2023-06-02 9:22 ` [PATCH vhost v10 08/10] virtio_ring: introduce virtqueue_dma_dev() Xuan Zhuo 2023-06-02 9:22 ` [PATCH vhost v10 09/10] virtio_ring: introduce virtqueue_add_sg() Xuan Zhuo 2023-06-02 9:22 ` Xuan Zhuo 2023-06-02 9:22 ` [PATCH vhost v10 10/10] virtio_net: support dma premapped Xuan Zhuo 2023-06-02 9:22 ` Xuan Zhuo 2023-06-03 6:31 ` Jakub Kicinski 2023-06-05 2:10 ` Xuan Zhuo 2023-06-05 2:10 ` Xuan Zhuo 2023-06-05 5:44 ` Michael S. Tsirkin 2023-06-05 5:44 ` Michael S. Tsirkin 2023-06-06 2:11 ` Xuan Zhuo 2023-06-06 2:11 ` Xuan Zhuo 2023-06-22 12:15 ` Michael S. Tsirkin 2023-06-22 12:15 ` Michael S. Tsirkin 2023-06-25 2:43 ` Xuan Zhuo 2023-06-25 2:43 ` Xuan Zhuo 2023-06-27 8:03 ` Jason Wang 2023-06-27 8:03 ` Jason Wang 2023-06-27 9:23 ` Xuan Zhuo 2023-06-27 9:23 ` Xuan Zhuo 2023-06-03 6:29 ` [PATCH vhost v10 00/10] virtio core prepares for AF_XDP Jakub Kicinski 2023-06-05 1:58 ` Xuan Zhuo 2023-06-05 1:58 ` Xuan Zhuo 2023-06-07 14:05 ` Christoph Hellwig 2023-06-07 14:05 ` Christoph Hellwig 2023-06-07 20:15 ` Michael S. Tsirkin 2023-06-07 20:15 ` Michael S. Tsirkin 2023-06-21 6:42 ` Xuan Zhuo 2023-06-21 6:42 ` Xuan Zhuo 2023-06-25 7:19 ` Jason Wang 2023-06-25 7:19 ` Jason Wang 2023-06-22 19:38 ` Michael S. Tsirkin 2023-06-22 19:38 ` Michael S. Tsirkin
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