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-rw-r--r--drivers/virtio/virtio_pci_common.h6
-rw-r--r--drivers/virtio/virtio_pci_legacy.c42
-rw-r--r--drivers/virtio/virtio_pci_modern.c61
3 files changed, 33 insertions, 76 deletions
diff --git a/drivers/virtio/virtio_pci_common.h b/drivers/virtio/virtio_pci_common.h
index 2cc2522..2826320 100644
--- a/drivers/virtio/virtio_pci_common.h
+++ b/drivers/virtio/virtio_pci_common.h
@@ -35,12 +35,6 @@ struct virtio_pci_vq_info {
/* the actual virtqueue */
struct virtqueue *vq;
- /* the number of entries in the queue */
- int num;
-
- /* the virtual address of the ring queue */
- void *queue;
-
/* the list node for the virtqueues list */
struct list_head node;
diff --git a/drivers/virtio/virtio_pci_legacy.c b/drivers/virtio/virtio_pci_legacy.c
index 48bc979..8c4e617 100644
--- a/drivers/virtio/virtio_pci_legacy.c
+++ b/drivers/virtio/virtio_pci_legacy.c
@@ -119,7 +119,6 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
u16 msix_vec)
{
struct virtqueue *vq;
- unsigned long size;
u16 num;
int err;
@@ -131,27 +130,19 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
if (!num || ioread32(vp_dev->ioaddr + VIRTIO_PCI_QUEUE_PFN))
return ERR_PTR(-ENOENT);
- info->num = num;
info->msix_vector = msix_vec;
- size = PAGE_ALIGN(vring_size(num, VIRTIO_PCI_VRING_ALIGN));
- info->queue = alloc_pages_exact(size, GFP_KERNEL|__GFP_ZERO);
- if (info->queue == NULL)
+ /* create the vring */
+ vq = vring_create_virtqueue(index, num,
+ VIRTIO_PCI_VRING_ALIGN, &vp_dev->vdev,
+ true, false, vp_notify, callback, name);
+ if (!vq)
return ERR_PTR(-ENOMEM);
/* activate the queue */
- iowrite32(virt_to_phys(info->queue) >> VIRTIO_PCI_QUEUE_ADDR_SHIFT,
+ iowrite32(virtqueue_get_desc_addr(vq) >> VIRTIO_PCI_QUEUE_ADDR_SHIFT,
vp_dev->ioaddr + VIRTIO_PCI_QUEUE_PFN);
- /* create the vring */
- vq = vring_new_virtqueue(index, info->num,
- VIRTIO_PCI_VRING_ALIGN, &vp_dev->vdev,
- true, info->queue, vp_notify, callback, name);
- if (!vq) {
- err = -ENOMEM;
- goto out_activate_queue;
- }
-
vq->priv = (void __force *)vp_dev->ioaddr + VIRTIO_PCI_QUEUE_NOTIFY;
if (msix_vec != VIRTIO_MSI_NO_VECTOR) {
@@ -159,17 +150,15 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
msix_vec = ioread16(vp_dev->ioaddr + VIRTIO_MSI_QUEUE_VECTOR);
if (msix_vec == VIRTIO_MSI_NO_VECTOR) {
err = -EBUSY;
- goto out_assign;
+ goto out_deactivate;
}
}
return vq;
-out_assign:
- vring_del_virtqueue(vq);
-out_activate_queue:
+out_deactivate:
iowrite32(0, vp_dev->ioaddr + VIRTIO_PCI_QUEUE_PFN);
- free_pages_exact(info->queue, size);
+ vring_del_virtqueue(vq);
return ERR_PTR(err);
}
@@ -177,7 +166,6 @@ static void del_vq(struct virtio_pci_vq_info *info)
{
struct virtqueue *vq = info->vq;
struct virtio_pci_device *vp_dev = to_vp_device(vq->vdev);
- unsigned long size;
iowrite16(vq->index, vp_dev->ioaddr + VIRTIO_PCI_QUEUE_SEL);
@@ -188,13 +176,10 @@ static void del_vq(struct virtio_pci_vq_info *info)
ioread8(vp_dev->ioaddr + VIRTIO_PCI_ISR);
}
- vring_del_virtqueue(vq);
-
/* Select and deactivate the queue */
iowrite32(0, vp_dev->ioaddr + VIRTIO_PCI_QUEUE_PFN);
- size = PAGE_ALIGN(vring_size(info->num, VIRTIO_PCI_VRING_ALIGN));
- free_pages_exact(info->queue, size);
+ vring_del_virtqueue(vq);
}
static const struct virtio_config_ops virtio_pci_config_ops = {
@@ -227,6 +212,13 @@ int virtio_pci_legacy_probe(struct virtio_pci_device *vp_dev)
return -ENODEV;
}
+ rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(64));
+ if (rc)
+ rc = dma_set_mask_and_coherent(&pci_dev->dev,
+ DMA_BIT_MASK(32));
+ if (rc)
+ dev_warn(&pci_dev->dev, "Failed to enable 64-bit or 32-bit DMA. Trying to continue, but this might not work.\n");
+
rc = pci_request_region(pci_dev, 0, "virtio-pci-legacy");
if (rc)
return rc;
diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
index 7760fc1..f6f28cc 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -287,31 +287,6 @@ static u16 vp_config_vector(struct virtio_pci_device *vp_dev, u16 vector)
return vp_ioread16(&vp_dev->common->msix_config);
}
-static size_t vring_pci_size(u16 num)
-{
- /* We only need a cacheline separation. */
- return PAGE_ALIGN(vring_size(num, SMP_CACHE_BYTES));
-}
-
-static void *alloc_virtqueue_pages(int *num)
-{
- void *pages;
-
- /* TODO: allocate each queue chunk individually */
- for (; *num && vring_pci_size(*num) > PAGE_SIZE; *num /= 2) {
- pages = alloc_pages_exact(vring_pci_size(*num),
- GFP_KERNEL|__GFP_ZERO|__GFP_NOWARN);
- if (pages)
- return pages;
- }
-
- if (!*num)
- return NULL;
-
- /* Try to get a single page. You are my only hope! */
- return alloc_pages_exact(vring_pci_size(*num), GFP_KERNEL|__GFP_ZERO);
-}
-
static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
struct virtio_pci_vq_info *info,
unsigned index,
@@ -343,29 +318,22 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
/* get offset of notification word for this vq */
off = vp_ioread16(&cfg->queue_notify_off);
- info->num = num;
info->msix_vector = msix_vec;
- info->queue = alloc_virtqueue_pages(&info->num);
- if (info->queue == NULL)
- return ERR_PTR(-ENOMEM);
-
/* create the vring */
- vq = vring_new_virtqueue(index, info->num,
- SMP_CACHE_BYTES, &vp_dev->vdev,
- true, info->queue, vp_notify, callback, name);
- if (!vq) {
- err = -ENOMEM;
- goto err_new_queue;
- }
+ vq = vring_create_virtqueue(index, num,
+ SMP_CACHE_BYTES, &vp_dev->vdev,
+ true, true, vp_notify, callback, name);
+ if (!vq)
+ return ERR_PTR(-ENOMEM);
/* activate the queue */
- vp_iowrite16(num, &cfg->queue_size);
- vp_iowrite64_twopart(virt_to_phys(info->queue),
+ vp_iowrite16(virtqueue_get_vring_size(vq), &cfg->queue_size);
+ vp_iowrite64_twopart(virtqueue_get_desc_addr(vq),
&cfg->queue_desc_lo, &cfg->queue_desc_hi);
- vp_iowrite64_twopart(virt_to_phys(virtqueue_get_avail(vq)),
+ vp_iowrite64_twopart(virtqueue_get_avail_addr(vq),
&cfg->queue_avail_lo, &cfg->queue_avail_hi);
- vp_iowrite64_twopart(virt_to_phys(virtqueue_get_used(vq)),
+ vp_iowrite64_twopart(virtqueue_get_used_addr(vq),
&cfg->queue_used_lo, &cfg->queue_used_hi);
if (vp_dev->notify_base) {
@@ -410,8 +378,6 @@ err_assign_vector:
pci_iounmap(vp_dev->pci_dev, (void __iomem __force *)vq->priv);
err_map_notify:
vring_del_virtqueue(vq);
-err_new_queue:
- free_pages_exact(info->queue, vring_pci_size(info->num));
return ERR_PTR(err);
}
@@ -456,8 +422,6 @@ static void del_vq(struct virtio_pci_vq_info *info)
pci_iounmap(vp_dev->pci_dev, (void __force __iomem *)vq->priv);
vring_del_virtqueue(vq);
-
- free_pages_exact(info->queue, vring_pci_size(info->num));
}
static const struct virtio_config_ops virtio_pci_config_nodev_ops = {
@@ -641,6 +605,13 @@ int virtio_pci_modern_probe(struct virtio_pci_device *vp_dev)
return -EINVAL;
}
+ err = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(64));
+ if (err)
+ err = dma_set_mask_and_coherent(&pci_dev->dev,
+ DMA_BIT_MASK(32));
+ if (err)
+ dev_warn(&pci_dev->dev, "Failed to enable 64-bit or 32-bit DMA. Trying to continue, but this might not work.\n");
+
/* Device capability is only mandatory for devices that have
* device-specific configuration.
*/
generated by cgit v0.10.2 at 2024-06-29 14:32:41 (GMT)