[PATCH v9 25/32] virtio_pci: support the arg sizes of find_vqs()
Xuan Zhuo
xuanzhuo at linux.alibaba.com
Tue Apr 5 20:43:39 PDT 2022
Virtio PCI supports new parameter sizes of find_vqs().
Signed-off-by: Xuan Zhuo <xuanzhuo at linux.alibaba.com>
---
drivers/virtio/virtio_pci_common.c | 18 ++++++++++--------
drivers/virtio/virtio_pci_common.h | 1 +
drivers/virtio/virtio_pci_legacy.c | 6 +++++-
drivers/virtio/virtio_pci_modern.c | 10 +++++++---
4 files changed, 23 insertions(+), 12 deletions(-)
diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c
index 826ea2e35d54..23976c61583f 100644
--- a/drivers/virtio/virtio_pci_common.c
+++ b/drivers/virtio/virtio_pci_common.c
@@ -208,6 +208,7 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors,
static struct virtqueue *vp_setup_vq(struct virtio_device *vdev, unsigned index,
void (*callback)(struct virtqueue *vq),
const char *name,
+ u32 size,
bool ctx,
u16 msix_vec)
{
@@ -220,7 +221,7 @@ static struct virtqueue *vp_setup_vq(struct virtio_device *vdev, unsigned index,
if (!info)
return ERR_PTR(-ENOMEM);
- vq = vp_dev->setup_vq(vp_dev, info, index, callback, name, ctx,
+ vq = vp_dev->setup_vq(vp_dev, info, index, callback, name, size, ctx,
msix_vec);
if (IS_ERR(vq))
goto out_info;
@@ -314,7 +315,7 @@ void vp_del_vqs(struct virtio_device *vdev)
static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned nvqs,
struct virtqueue *vqs[], vq_callback_t *callbacks[],
- const char * const names[], bool per_vq_vectors,
+ const char * const names[], u32 sizes[], bool per_vq_vectors,
const bool *ctx,
struct irq_affinity *desc)
{
@@ -357,8 +358,8 @@ static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned nvqs,
else
msix_vec = VP_MSIX_VQ_VECTOR;
vqs[i] = vp_setup_vq(vdev, queue_idx++, callbacks[i], names[i],
- ctx ? ctx[i] : false,
- msix_vec);
+ sizes ? sizes[i] : 0,
+ ctx ? ctx[i] : false, msix_vec);
if (IS_ERR(vqs[i])) {
err = PTR_ERR(vqs[i]);
goto error_find;
@@ -388,7 +389,7 @@ static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned nvqs,
static int vp_find_vqs_intx(struct virtio_device *vdev, unsigned nvqs,
struct virtqueue *vqs[], vq_callback_t *callbacks[],
- const char * const names[], const bool *ctx)
+ const char * const names[], u32 sizes[], const bool *ctx)
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
int i, err, queue_idx = 0;
@@ -410,6 +411,7 @@ static int vp_find_vqs_intx(struct virtio_device *vdev, unsigned 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])) {
@@ -433,15 +435,15 @@ int vp_find_vqs(struct virtio_device *vdev, unsigned nvqs,
int err;
/* Try MSI-X with one vector per queue. */
- err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, true, ctx, desc);
+ err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, sizes, 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, false, ctx, desc);
+ err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, sizes, false, ctx, desc);
if (!err)
return 0;
/* Finally fall back to regular interrupts. */
- return vp_find_vqs_intx(vdev, nvqs, vqs, callbacks, names, ctx);
+ return vp_find_vqs_intx(vdev, nvqs, vqs, callbacks, names, sizes, ctx);
}
const char *vp_bus_name(struct virtio_device *vdev)
diff --git a/drivers/virtio/virtio_pci_common.h b/drivers/virtio/virtio_pci_common.h
index 859eed559e10..fbf5a6d4b164 100644
--- a/drivers/virtio/virtio_pci_common.h
+++ b/drivers/virtio/virtio_pci_common.h
@@ -81,6 +81,7 @@ struct virtio_pci_device {
unsigned 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);
diff --git a/drivers/virtio/virtio_pci_legacy.c b/drivers/virtio/virtio_pci_legacy.c
index b68934fe6b5d..2c4ade5fb420 100644
--- a/drivers/virtio/virtio_pci_legacy.c
+++ b/drivers/virtio/virtio_pci_legacy.c
@@ -112,6 +112,7 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
unsigned index,
void (*callback)(struct virtqueue *vq),
const char *name,
+ u32 size,
bool ctx,
u16 msix_vec)
{
@@ -125,10 +126,13 @@ 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, num,
+ vq = vring_create_virtqueue(index, size,
VIRTIO_PCI_VRING_ALIGN, &vp_dev->vdev,
true, false, ctx,
vp_notify, callback, name);
diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
index 3b35e5056165..a17c47d4435a 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -289,6 +289,7 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
unsigned index,
void (*callback)(struct virtqueue *vq),
const char *name,
+ u32 size,
bool ctx,
u16 msix_vec)
{
@@ -306,15 +307,18 @@ 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 (num & (num - 1)) {
- dev_warn(&vp_dev->pci_dev->dev, "bad queue size %u", num);
+ if (!size || size > num)
+ size = num;
+
+ if (size & (size - 1)) {
+ dev_warn(&vp_dev->pci_dev->dev, "bad queue size %u", size);
return ERR_PTR(-EINVAL);
}
info->msix_vector = msix_vec;
/* create the vring */
- vq = vring_create_virtqueue(index, num,
+ vq = vring_create_virtqueue(index, size,
SMP_CACHE_BYTES, &vp_dev->vdev,
true, true, ctx,
vp_notify, callback, name);
--
2.31.0
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