[PATCH v4 05/10] net/virtio: add Rx queue intr enable/disable functions
From: Jianfeng Tan <hidden>
Date: 2017-01-17 07:09:56
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
This patch implements interrupt enable/disable functions for each Rx queue. And we rely on flags of avail queue as the hint for virtio device to interrupt virtio driver or not. Signed-off-by: Jianfeng Tan <redacted> Tested-by: Lei Yao <redacted> --- drivers/net/virtio/virtio_ethdev.c | 22 ++++++++++++++++++++++ drivers/net/virtio/virtqueue.c | 11 ----------- drivers/net/virtio/virtqueue.h | 16 +++++++++++++++- 3 files changed, 37 insertions(+), 12 deletions(-)
diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index bec2be2..4224d17 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c@@ -717,6 +717,26 @@ virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu) return 0; } +static int +virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id) +{ + struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id]; + struct virtqueue *vq = rxvq->vq; + + virtqueue_enable_intr(vq); + return 0; +} + +static int +virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id) +{ + struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id]; + struct virtqueue *vq = rxvq->vq; + + virtqueue_disable_intr(vq); + return 0; +} + /* * dev_ops for virtio, bare necessities for basic operation */
@@ -738,6 +758,8 @@ static const struct eth_dev_ops virtio_eth_dev_ops = { .xstats_reset = virtio_dev_stats_reset, .link_update = virtio_dev_link_update, .rx_queue_setup = virtio_dev_rx_queue_setup, + .rx_queue_intr_enable = virtio_dev_rx_queue_intr_enable, + .rx_queue_intr_disable = virtio_dev_rx_queue_intr_disable, .rx_queue_release = virtio_dev_queue_release, .rx_descriptor_done = virtio_dev_rx_queue_done, .tx_queue_setup = virtio_dev_tx_queue_setup,
diff --git a/drivers/net/virtio/virtqueue.c b/drivers/net/virtio/virtqueue.c
index 7f60e3e..9ad77b8 100644
--- a/drivers/net/virtio/virtqueue.c
+++ b/drivers/net/virtio/virtqueue.c@@ -38,17 +38,6 @@ #include "virtio_logs.h" #include "virtio_pci.h" -void -virtqueue_disable_intr(struct virtqueue *vq) -{ - /* - * Set VRING_AVAIL_F_NO_INTERRUPT to hint host - * not to interrupt when it consumes packets - * Note: this is only considered a hint to the host - */ - vq->vq_ring.avail->flags |= VRING_AVAIL_F_NO_INTERRUPT; -} - /* * Two types of mbuf to be cleaned: * 1) mbuf that has been consumed by backend but not used by virtio.
diff --git a/drivers/net/virtio/virtqueue.h b/drivers/net/virtio/virtqueue.h
index b1070e0..f9e3736 100644
--- a/drivers/net/virtio/virtqueue.h
+++ b/drivers/net/virtio/virtqueue.h@@ -274,7 +274,21 @@ vring_desc_init(struct vring_desc *dp, uint16_t n) /** * Tell the backend not to interrupt us. */ -void virtqueue_disable_intr(struct virtqueue *vq); +static inline void +virtqueue_disable_intr(struct virtqueue *vq) +{ + vq->vq_ring.avail->flags |= VRING_AVAIL_F_NO_INTERRUPT; +} + +/** + * Tell the backend to interrupt us. + */ +static inline void +virtqueue_enable_intr(struct virtqueue *vq) +{ + vq->vq_ring.avail->flags &= (~VRING_AVAIL_F_NO_INTERRUPT); +} + /** * Dump virtqueue internal structures, for debug purpose only. */
--
2.7.4