From: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
To: virtualization@lists.linux-foundation.org, netdev@vger.kernel.org
Cc: "Michael S. Tsirkin" <mst@redhat.com>,
Jason Wang <jasowang@redhat.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Jesper Dangaard Brouer <hawk@kernel.org>,
John Fastabend <john.fastabend@gmail.com>,
bpf@vger.kernel.org
Subject: [PATCH v5 05/22] virtio_ring: queue_reset: split: support enable reset queue
Date: Mon, 14 Feb 2022 16:13:59 +0800 [thread overview]
Message-ID: <20220214081416.117695-6-xuanzhuo@linux.alibaba.com> (raw)
In-Reply-To: <20220214081416.117695-1-xuanzhuo@linux.alibaba.com>
The purpose of this patch is to make vring split support re-enable reset
vq.
Based on whether the incoming vq passed by vring_setup_virtqueue() is
NULL or not, distinguish whether it is a normal create virtqueue or
re-enable a reset queue.
When re-enable a reset queue, reuse the original callback, name,
indirect.
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
---
drivers/virtio/virtio_ring.c | 52 +++++++++++++++++++++++++-----------
1 file changed, 37 insertions(+), 15 deletions(-)
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 9cfbe45ab286..4639e1643c78 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -198,6 +198,16 @@ struct vring_virtqueue {
#endif
};
+static int __vring_init_virtqueue(struct virtqueue *_vq,
+ unsigned int index,
+ struct vring vring,
+ struct virtio_device *vdev,
+ bool weak_barriers,
+ bool context,
+ bool (*notify)(struct virtqueue *),
+ void (*callback)(struct virtqueue *),
+ const char *name,
+ bool reset);
/*
* Helpers.
@@ -925,9 +935,9 @@ static struct virtqueue *vring_create_virtqueue_split(
bool context,
bool (*notify)(struct virtqueue *),
void (*callback)(struct virtqueue *),
- const char *name)
+ const char *name,
+ struct virtqueue *vq)
{
- struct virtqueue *vq;
void *queue = NULL;
dma_addr_t dma_addr;
size_t queue_size_in_bytes;
@@ -964,12 +974,17 @@ static struct virtqueue *vring_create_virtqueue_split(
queue_size_in_bytes = vring_size(num, vring_align);
vring_init(&vring, num, queue, vring_align);
- vq = __vring_new_virtqueue(index, vring, vdev, weak_barriers, context,
- notify, callback, name);
if (!vq) {
- vring_free_queue(vdev, queue_size_in_bytes, queue,
- dma_addr);
- return NULL;
+ vq = __vring_new_virtqueue(index, vring, vdev, weak_barriers,
+ context, notify, callback, name);
+ if (!vq)
+ goto err;
+
+ } else {
+ if (__vring_init_virtqueue(vq, index, vring, vdev,
+ weak_barriers, context, notify,
+ callback, name, true))
+ goto err;
}
to_vvq(vq)->split.queue_dma_addr = dma_addr;
@@ -977,6 +992,9 @@ static struct virtqueue *vring_create_virtqueue_split(
to_vvq(vq)->we_own_ring = true;
return vq;
+err:
+ vring_free_queue(vdev, queue_size_in_bytes, queue, dma_addr);
+ return NULL;
}
@@ -2177,14 +2195,20 @@ static int __vring_init_virtqueue(struct virtqueue *_vq,
bool context,
bool (*notify)(struct virtqueue *),
void (*callback)(struct virtqueue *),
- const char *name)
+ const char *name,
+ bool reset)
{
struct vring_virtqueue *vq = to_vvq(_vq);
+ if (!reset) {
+ vq->vq.callback = callback;
+ vq->vq.name = name;
+ vq->indirect = virtio_has_feature(vdev, VIRTIO_RING_F_INDIRECT_DESC) &&
+ !context;
+ }
+
vq->packed_ring = false;
- vq->vq.callback = callback;
vq->vq.vdev = vdev;
- vq->vq.name = name;
vq->vq.num_free = vring.num;
vq->vq.index = index;
vq->we_own_ring = false;
@@ -2200,8 +2224,6 @@ static int __vring_init_virtqueue(struct virtqueue *_vq,
vq->last_add_time_valid = false;
#endif
- vq->indirect = virtio_has_feature(vdev, VIRTIO_RING_F_INDIRECT_DESC) &&
- !context;
vq->event = virtio_has_feature(vdev, VIRTIO_RING_F_EVENT_IDX);
if (virtio_has_feature(vdev, VIRTIO_F_ORDER_PLATFORM))
@@ -2215,7 +2237,7 @@ static int __vring_init_virtqueue(struct virtqueue *_vq,
vq->split.avail_idx_shadow = 0;
/* No callback? Tell other side not to bother us. */
- if (!callback) {
+ if (!vq->vq.callback) {
vq->split.avail_flags_shadow |= VRING_AVAIL_F_NO_INTERRUPT;
if (!vq->event)
vq->split.vring.avail->flags = cpu_to_virtio16(vdev,
@@ -2267,7 +2289,7 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index,
return NULL;
err = __vring_init_virtqueue(&vq->vq, index, vring, vdev, weak_barriers,
- context, notify, callback, name);
+ context, notify, callback, name, false);
if (err) {
kfree(vq);
@@ -2299,7 +2321,7 @@ struct virtqueue *vring_setup_virtqueue(
return vring_create_virtqueue_split(index, num, vring_align,
vdev, weak_barriers, may_reduce_num,
- context, notify, callback, name);
+ context, notify, callback, name, vq);
}
EXPORT_SYMBOL_GPL(vring_setup_virtqueue);
--
2.31.0
next prev parent reply other threads:[~2022-02-14 8:14 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-14 8:13 [PATCH v5 00/22] virtio pci support VIRTIO_F_RING_RESET Xuan Zhuo
2022-02-14 8:13 ` [PATCH v5 01/22] virtio_pci: struct virtio_pci_common_cfg add queue_notify_data Xuan Zhuo
2022-02-14 8:13 ` [PATCH v5 02/22] virtio: queue_reset: add VIRTIO_F_RING_RESET Xuan Zhuo
2022-02-14 8:13 ` [PATCH v5 03/22] virtio_ring: queue_reset: add function vring_setup_virtqueue() Xuan Zhuo
2022-02-14 8:13 ` [PATCH v5 04/22] virtio_ring: queue_reset: split: add __vring_init_virtqueue() Xuan Zhuo
2022-02-14 8:13 ` Xuan Zhuo [this message]
2022-02-14 8:14 ` [PATCH v5 06/22] virtio_ring: queue_reset: packed: support enable reset queue Xuan Zhuo
2022-02-16 4:14 ` Jason Wang
2022-02-14 8:14 ` [PATCH v5 07/22] virtio_ring: queue_reset: extract the release function of the vq ring Xuan Zhuo
2022-02-14 8:14 ` [PATCH v5 08/22] virtio_ring: queue_reset: add vring_release_virtqueue() Xuan Zhuo
2022-02-16 4:14 ` Jason Wang
2022-02-14 8:14 ` [PATCH v5 09/22] virtio: queue_reset: struct virtio_config_ops add callbacks for queue_reset Xuan Zhuo
2022-02-14 8:14 ` [PATCH v5 10/22] virtio_pci: queue_reset: update struct virtio_pci_common_cfg and option functions Xuan Zhuo
2022-02-14 8:14 ` [PATCH v5 11/22] virtio_pci: queue_reset: release vq by vp_dev->vqs Xuan Zhuo
2022-02-14 8:14 ` [PATCH v5 12/22] virtio_pci: queue_reset: setup_vq() support vring_setup_virtqueue() Xuan Zhuo
2022-02-14 8:14 ` [PATCH v5 13/22] virtio_pci: queue_reset: reserve vq->priv for re-enable queue Xuan Zhuo
2022-02-14 8:14 ` [PATCH v5 14/22] virtio_pci: queue_reset: support VIRTIO_F_RING_RESET Xuan Zhuo
2022-02-16 4:14 ` Jason Wang
2022-02-16 8:03 ` Xuan Zhuo
2022-02-17 7:25 ` Jason Wang
2022-02-14 8:14 ` [PATCH v5 15/22] virtio: queue_reset: add helper Xuan Zhuo
2022-02-14 8:14 ` [PATCH v5 16/22] virtio_net: split free_unused_bufs() Xuan Zhuo
2022-02-14 8:14 ` [PATCH v5 17/22] virtio_net: support rx/tx queue reset Xuan Zhuo
2022-02-16 4:14 ` Jason Wang
2022-02-16 7:56 ` Xuan Zhuo
2022-02-16 8:35 ` Michael S. Tsirkin
2022-02-16 8:42 ` Xuan Zhuo
2022-02-14 8:14 ` [PATCH v5 18/22] virtio: add helper virtqueue_get_vring_max_size() Xuan Zhuo
2022-02-14 8:14 ` [PATCH v5 19/22] virtio: add helper virtio_set_max_ring_num() Xuan Zhuo
2022-02-16 4:14 ` Jason Wang
2022-02-16 7:54 ` Xuan Zhuo
2022-02-14 8:14 ` [PATCH v5 20/22] virtio_net: set the default max ring num Xuan Zhuo
2022-02-16 4:14 ` Jason Wang
2022-02-16 7:46 ` Xuan Zhuo
2022-02-17 7:21 ` Jason Wang
2022-02-17 9:30 ` Xuan Zhuo
2022-02-21 3:40 ` Jason Wang
2022-02-21 7:00 ` Jason Wang
2022-02-14 8:14 ` [PATCH v5 21/22] virtio_net: get max ring size by virtqueue_get_vring_max_size() Xuan Zhuo
2022-02-14 8:14 ` [PATCH v5 22/22] virtio_net: support set_ringparam Xuan Zhuo
2022-02-16 4:14 ` Jason Wang
2022-02-16 7:21 ` Xuan Zhuo
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