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Date: Wed, 9 Feb 2022 20:28:59 +0800
From: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
To: linux-kernel@...r.kernel.org
Cc: "Michael S. Tsirkin" <mst@...hat.com>,
Jason Wang <jasowang@...hat.com>,
virtualization@...ts.linux-foundation.org
Subject: [PATCH v4 12/14] virtio_pci: queue_reset: setup_vq() support vring_setup_virtqueue()
modern setup_vq() replaces vring_create_virtqueue() with
vring_setup_virtqueue()
vp_setup_vq() can pass the original vq(from info->vq) to re-enable vq.
Allow direct calls to vp_setup_vq() in virtio_pci_modern.c
Signed-off-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
---
drivers/virtio/virtio_pci_common.c | 31 ++++++++++++++++++------------
drivers/virtio/virtio_pci_common.h | 8 +++++++-
drivers/virtio/virtio_pci_legacy.c | 4 ++--
drivers/virtio/virtio_pci_modern.c | 12 ++++++------
4 files changed, 34 insertions(+), 21 deletions(-)
diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c
index 6b2573ec1ae8..5a4f750a0b97 100644
--- a/drivers/virtio/virtio_pci_common.c
+++ b/drivers/virtio/virtio_pci_common.c
@@ -205,28 +205,33 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors,
return err;
}
-static struct virtqueue *vp_setup_vq(struct virtio_device *vdev, unsigned index,
- void (*callback)(struct virtqueue *vq),
- const char *name,
- bool ctx,
- u16 msix_vec)
+struct virtqueue *vp_setup_vq(struct virtio_device *vdev, unsigned int index,
+ void (*callback)(struct virtqueue *vq),
+ const char *name,
+ bool ctx,
+ u16 msix_vec)
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
- struct virtio_pci_vq_info *info = kmalloc(sizeof *info, GFP_KERNEL);
+ struct virtio_pci_vq_info *info;
struct virtqueue *vq;
unsigned long flags;
- /* fill out our structure that represents an active queue */
- if (!info)
- return ERR_PTR(-ENOMEM);
+ info = vp_dev->vqs[index];
+ if (!info) {
+ info = kzalloc(sizeof(*info), GFP_KERNEL);
+
+ /* fill out our structure that represents an active queue */
+ if (!info)
+ return ERR_PTR(-ENOMEM);
+ }
vq = vp_dev->setup_vq(vp_dev, info, index, callback, name, ctx,
- msix_vec);
+ msix_vec, info->vq);
if (IS_ERR(vq))
goto out_info;
info->vq = vq;
- if (callback) {
+ if (vq->callback) {
spin_lock_irqsave(&vp_dev->lock, flags);
list_add(&info->node, &vp_dev->virtqueues);
spin_unlock_irqrestore(&vp_dev->lock, flags);
@@ -238,7 +243,9 @@ static struct virtqueue *vp_setup_vq(struct virtio_device *vdev, unsigned index,
return vq;
out_info:
- kfree(info);
+ if (!info->vq)
+ kfree(info);
+
return vq;
}
diff --git a/drivers/virtio/virtio_pci_common.h b/drivers/virtio/virtio_pci_common.h
index 392d990b7c73..696e3f6a493b 100644
--- a/drivers/virtio/virtio_pci_common.h
+++ b/drivers/virtio/virtio_pci_common.h
@@ -84,7 +84,8 @@ struct virtio_pci_device {
void (*callback)(struct virtqueue *vq),
const char *name,
bool ctx,
- u16 msix_vec);
+ u16 msix_vec,
+ struct virtqueue *vq);
void (*del_vq)(struct virtio_pci_vq_info *info);
u16 (*config_vector)(struct virtio_pci_device *vp_dev, u16 vector);
@@ -117,6 +118,11 @@ int vp_find_vqs(struct virtio_device *vdev, unsigned nvqs,
struct virtqueue *vqs[], vq_callback_t *callbacks[],
const char * const names[], const bool *ctx,
struct irq_affinity *desc);
+struct virtqueue *vp_setup_vq(struct virtio_device *vdev, unsigned int index,
+ void (*callback)(struct virtqueue *vq),
+ const char *name,
+ bool ctx,
+ u16 msix_vec);
const char *vp_bus_name(struct virtio_device *vdev);
/* Setup the affinity for a virtqueue:
diff --git a/drivers/virtio/virtio_pci_legacy.c b/drivers/virtio/virtio_pci_legacy.c
index b3f8128b7983..aa28a02d11f2 100644
--- a/drivers/virtio/virtio_pci_legacy.c
+++ b/drivers/virtio/virtio_pci_legacy.c
@@ -113,9 +113,9 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
void (*callback)(struct virtqueue *vq),
const char *name,
bool ctx,
- u16 msix_vec)
+ u16 msix_vec,
+ struct virtqueue *vq)
{
- struct virtqueue *vq;
u16 num;
int err;
u64 q_pfn;
diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
index 5455bc041fb6..5af82948f0ae 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -187,11 +187,11 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
void (*callback)(struct virtqueue *vq),
const char *name,
bool ctx,
- u16 msix_vec)
+ u16 msix_vec,
+ struct virtqueue *vq)
{
struct virtio_pci_modern_device *mdev = &vp_dev->mdev;
- struct virtqueue *vq;
u16 num;
int err;
@@ -211,10 +211,10 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
info->msix_vector = msix_vec;
/* create the vring */
- vq = vring_create_virtqueue(index, num,
- SMP_CACHE_BYTES, &vp_dev->vdev,
- true, true, ctx,
- vp_notify, callback, name);
+ vq = vring_setup_virtqueue(index, num,
+ SMP_CACHE_BYTES, &vp_dev->vdev,
+ true, true, ctx,
+ vp_notify, callback, name, vq);
if (!vq)
return ERR_PTR(-ENOMEM);
--
2.31.0
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