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virtio_pci: Revert "virtio_pci: support the arg sizes of find_vqs()" 

This reverts commit cdb44806fca2d0ad29ca644cbf1505433902ee0c: the legacy
path is wrong and in fact can not support the proposed API since for a
legacy device we never communicate the vq size to the hypervisor.

Reported-by: Andres Freund <andres@anarazel.de>
Fixes: cdb44806fc ("virtio_pci: support the arg sizes of find_vqs()")
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20220816053602.173815-5-mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2022-08-16 01:36:40 -04:00
parent c62f61b58f
commit 13aa8c6c37
4 changed files with 12 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/virtio/virtio_pci_common.c
View File

@ -174,7 +174,6 @@ error:
static struct virtqueue *vp_setup_vq(struct virtio_device *vdev, unsigned int index,
void (*callback)(struct virtqueue *vq),
const char *name,
u32 size,
bool ctx,
u16 msix_vec)
{
@ -187,7 +186,7 @@ static struct virtqueue *vp_setup_vq(struct virtio_device *vdev, unsigned int in
if (!info)
return ERR_PTR(-ENOMEM);
vq = vp_dev->setup_vq(vp_dev, info, index, callback, name, size, ctx,
vq = vp_dev->setup_vq(vp_dev, info, index, callback, name, ctx,
msix_vec);
if (IS_ERR(vq))
goto out_info;
@ -284,7 +283,7 @@ void vp_del_vqs(struct virtio_device *vdev)
static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned int nvqs,
struct virtqueue *vqs[], vq_callback_t *callbacks[],
const char * const names[], u32 sizes[], bool per_vq_vectors,
const char * const names[], bool per_vq_vectors,
const bool *ctx,
struct irq_affinity *desc)
{
@ -327,8 +326,8 @@ static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned int nvqs,
else
msix_vec = VP_MSIX_VQ_VECTOR;
vqs[i] = vp_setup_vq(vdev, queue_idx++, callbacks[i], names[i],
sizes ? sizes[i] : 0,
ctx ? ctx[i] : false, msix_vec);
ctx ? ctx[i] : false,
msix_vec);
if (IS_ERR(vqs[i])) {
err = PTR_ERR(vqs[i]);
goto error_find;
@ -358,7 +357,7 @@ error_find:
static int vp_find_vqs_intx(struct virtio_device *vdev, unsigned int nvqs,
struct virtqueue *vqs[], vq_callback_t *callbacks[],
const char * const names[], u32 sizes[], const bool *ctx)
const char * const names[], const bool *ctx)
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
int i, err, queue_idx = 0;
@ -380,7 +379,6 @@ static int vp_find_vqs_intx(struct virtio_device *vdev, unsigned int nvqs,
continue;
}
vqs[i] = vp_setup_vq(vdev, queue_idx++, callbacks[i], names[i],
sizes ? sizes[i] : 0,
ctx ? ctx[i] : false,
VIRTIO_MSI_NO_VECTOR);
if (IS_ERR(vqs[i])) {
@ -404,15 +402,15 @@ int vp_find_vqs(struct virtio_device *vdev, unsigned int nvqs,
int err;
/* Try MSI-X with one vector per queue. */
err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, sizes, true, ctx, desc);
err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, true, ctx, desc);
if (!err)
return 0;
/* Fallback: MSI-X with one vector for config, one shared for queues. */
err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, sizes, false, ctx, desc);
err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, false, ctx, desc);
if (!err)
return 0;
/* Finally fall back to regular interrupts. */
return vp_find_vqs_intx(vdev, nvqs, vqs, callbacks, names, sizes, ctx);
return vp_find_vqs_intx(vdev, nvqs, vqs, callbacks, names, ctx);
}
const char *vp_bus_name(struct virtio_device *vdev)

1
drivers/virtio/virtio_pci_common.h
View File

@ -80,7 +80,6 @@ struct virtio_pci_device {
unsigned int idx,
void (*callback)(struct virtqueue *vq),
const char *name,
u32 size,
bool ctx,
u16 msix_vec);
void (*del_vq)(struct virtio_pci_vq_info *info);

6
drivers/virtio/virtio_pci_legacy.c
View File

@ -112,7 +112,6 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
unsigned int index,
void (*callback)(struct virtqueue *vq),
const char *name,
u32 size,
bool ctx,
u16 msix_vec)
{
@ -126,13 +125,10 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
if (!num || vp_legacy_get_queue_enable(&vp_dev->ldev, index))
return ERR_PTR(-ENOENT);
if (!size || size > num)
size = num;
info->msix_vector = msix_vec;
/* create the vring */
vq = vring_create_virtqueue(index, size,
vq = vring_create_virtqueue(index, num,
VIRTIO_PCI_VRING_ALIGN, &vp_dev->vdev,
true, false, ctx,
vp_notify, callback, name);

10
drivers/virtio/virtio_pci_modern.c
View File

@ -293,7 +293,6 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
unsigned int index,
void (*callback)(struct virtqueue *vq),
const char *name,
u32 size,
bool ctx,
u16 msix_vec)
{
@ -311,18 +310,15 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
if (!num || vp_modern_get_queue_enable(mdev, index))
return ERR_PTR(-ENOENT);
if (!size || size > num)
size = num;
if (size & (size - 1)) {
dev_warn(&vp_dev->pci_dev->dev, "bad queue size %u", size);
if (num & (num - 1)) {
dev_warn(&vp_dev->pci_dev->dev, "bad queue size %u", num);
return ERR_PTR(-EINVAL);
}
info->msix_vector = msix_vec;
/* create the vring */
vq = vring_create_virtqueue(index, size,
vq = vring_create_virtqueue(index, num,
SMP_CACHE_BYTES, &vp_dev->vdev,
true, true, ctx,
vp_notify, callback, name);