From: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
To: virtualization@lists.linux-foundation.org, netdev@vger.kernel.org
Cc: Jesper Dangaard Brouer <hawk@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
"Michael S. Tsirkin" <mst@redhat.com>,
John Fastabend <john.fastabend@gmail.com>,
Alexei Starovoitov <ast@kernel.org>,
Jakub Kicinski <kuba@kernel.org>,
bpf@vger.kernel.org, "David S. Miller" <davem@davemloft.net>
Subject: [PATCH v2 08/12] virtio: queue_reset: add helper
Date: Thu, 20 Jan 2022 14:42:59 +0800 [thread overview]
Message-ID: <20220120064303.106639-9-xuanzhuo@linux.alibaba.com> (raw)
In-Reply-To: <20220120064303.106639-1-xuanzhuo@linux.alibaba.com>
Add helper for virtio queue reset.
* virtio_reset_vq: reset a queue individually
* virtio_enable_resetq: enable a reset queue
In the virtio_reset_vq(), these tasks will be completed:
1. notify the hardware queue to reset
2. recycle the buffer from vq
3. delete the vq
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
---
include/linux/virtio_config.h | 43 +++++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index e50a377c27a0..f84347f4e4ee 100644
--- a/include/linux/virtio_config.h
+++ b/include/linux/virtio_config.h
@@ -239,6 +239,49 @@ int virtio_find_vqs_ctx(struct virtio_device *vdev, unsigned nvqs,
desc);
}
+/**
+ * virtio_reset_vq - reset a queue individually
+ * @vdev: the device
+ * @queue_index: the queue index
+ * @callback: callback to free unused bufs
+ * @data: pass to callback
+ *
+ * returns 0 on success or error status
+ *
+ */
+static inline
+int virtio_reset_vq(struct virtio_device *vdev, u16 queue_index,
+ vq_reset_callback_t *callback, void *data)
+{
+ if (!vdev->config->reset_vq)
+ return -ENOENT;
+
+ return vdev->config->reset_vq(vdev, queue_index, callback, data);
+}
+
+/**
+ * virtio_enable_resetq - enable a reset queue
+ * @vdev: the device
+ * @queue_index: the queue index
+ * @callback: callback for the virtqueue, NULL for vq that do not need a callback
+ * @name: virtqueue names (mainly for debugging), NULL for vq unused by driver
+ * @ctx: ctx
+ *
+ * returns vq on success or error status
+ *
+ */
+static inline
+struct virtqueue *virtio_enable_resetq(struct virtio_device *vdev,
+ u16 queue_index, vq_callback_t *callback,
+ const char *name, const bool *ctx)
+{
+ if (!vdev->config->enable_reset_vq)
+ return ERR_PTR(-ENOENT);
+
+ return vdev->config->enable_reset_vq(vdev, queue_index, callback,
+ name, ctx);
+}
+
/**
* virtio_device_ready - enable vq use in probe function
* @vdev: the device
--
2.31.0
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next prev parent reply other threads:[~2022-01-20 6:43 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-20 6:42 [PATCH v2 00/12] virtio pci support VIRTIO_F_RING_RESET Xuan Zhuo
2022-01-20 6:42 ` [PATCH v2 01/12] virtio: pci: struct virtio_pci_common_cfg add queue_notify_data Xuan Zhuo
2022-01-20 6:42 ` [PATCH v2 02/12] virtio: queue_reset: add VIRTIO_F_RING_RESET Xuan Zhuo
2022-01-20 6:42 ` [PATCH v2 03/12] virtio: queue_reset: struct virtio_config_ops add callbacks for queue_reset Xuan Zhuo
2022-01-20 6:42 ` [PATCH v2 04/12] virtio: queue_reset: pci: update struct virtio_pci_common_cfg and option functions Xuan Zhuo
2022-01-20 6:42 ` [PATCH v2 05/12] virito: queue_reset: pci: move the per queue irq logic from vp_del_vqs to vp_del_vq Xuan Zhuo
2022-01-20 6:42 ` [PATCH v2 06/12] virtio: queue_reset: pci: add independent function to enable msix vq Xuan Zhuo
2022-01-20 6:42 ` [PATCH v2 07/12] virtio: queue_reset: pci: support VIRTIO_F_RING_RESET Xuan Zhuo
2022-01-20 10:55 ` Michael S. Tsirkin
2022-01-20 11:46 ` Xuan Zhuo
2022-01-20 15:03 ` Michael S. Tsirkin
2022-01-21 2:22 ` Xuan Zhuo
2022-01-21 10:22 ` Michael S. Tsirkin
2022-01-21 10:22 ` Michael S. Tsirkin
2022-01-21 10:26 ` Xuan Zhuo
2022-01-21 13:19 ` Michael S. Tsirkin
2022-01-21 14:09 ` Xuan Zhuo
2022-01-21 15:28 ` Michael S. Tsirkin
2022-01-21 15:34 ` Xuan Zhuo
2022-01-21 15:45 ` Michael S. Tsirkin
2022-01-21 15:49 ` Xuan Zhuo
2022-01-20 6:42 ` Xuan Zhuo [this message]
2022-01-20 6:43 ` [PATCH v2 09/12] virtio_net: virtnet_tx_timeout() fix style Xuan Zhuo
2022-01-20 6:43 ` [PATCH v2 10/12] virtio_net: virtnet_tx_timeout() stop ref sq->vq Xuan Zhuo
2022-01-20 6:43 ` [PATCH v2 11/12] virtio_net: split free_unused_bufs() Xuan Zhuo
2022-01-20 6:43 ` [PATCH v2 12/12] virtio-net: support pair disable/enable Xuan Zhuo
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