virtio_pci_modern: switch to type-safe io accessors
As Rusty noted, we were accessing queue_enable with an incorrect width. Switch to type-safe accessors so we don't make this mistake again in the future. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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c5d4c2c9ce
Коммит
a8557d32fe
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@ -57,6 +57,13 @@ static inline void vp_iowrite32(u32 value, u32 __iomem *addr)
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iowrite32(value, addr);
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}
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static void vp_iowrite64_twopart(u64 val,
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__le32 __iomem *lo, __le32 __iomem *hi)
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{
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vp_iowrite32((u32)val, lo);
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vp_iowrite32(val >> 32, hi);
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}
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static void __iomem *map_capability(struct pci_dev *dev, int off,
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size_t minlen,
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u32 align,
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@ -131,22 +138,16 @@ static void __iomem *map_capability(struct pci_dev *dev, int off,
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return p;
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}
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static void iowrite64_twopart(u64 val, __le32 __iomem *lo, __le32 __iomem *hi)
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{
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iowrite32((u32)val, lo);
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iowrite32(val >> 32, hi);
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}
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/* virtio config->get_features() implementation */
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static u64 vp_get_features(struct virtio_device *vdev)
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{
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struct virtio_pci_device *vp_dev = to_vp_device(vdev);
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u64 features;
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iowrite32(0, &vp_dev->common->device_feature_select);
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features = ioread32(&vp_dev->common->device_feature);
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iowrite32(1, &vp_dev->common->device_feature_select);
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features |= ((u64)ioread32(&vp_dev->common->device_feature) << 32);
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vp_iowrite32(0, &vp_dev->common->device_feature_select);
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features = vp_ioread32(&vp_dev->common->device_feature);
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vp_iowrite32(1, &vp_dev->common->device_feature_select);
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features |= ((u64)vp_ioread32(&vp_dev->common->device_feature) << 32);
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return features;
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}
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@ -165,10 +166,10 @@ static int vp_finalize_features(struct virtio_device *vdev)
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return -EINVAL;
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}
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iowrite32(0, &vp_dev->common->guest_feature_select);
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iowrite32((u32)vdev->features, &vp_dev->common->guest_feature);
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iowrite32(1, &vp_dev->common->guest_feature_select);
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iowrite32(vdev->features >> 32, &vp_dev->common->guest_feature);
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vp_iowrite32(0, &vp_dev->common->guest_feature_select);
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vp_iowrite32((u32)vdev->features, &vp_dev->common->guest_feature);
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vp_iowrite32(1, &vp_dev->common->guest_feature_select);
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vp_iowrite32(vdev->features >> 32, &vp_dev->common->guest_feature);
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return 0;
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}
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@ -247,14 +248,14 @@ static void vp_set(struct virtio_device *vdev, unsigned offset,
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static u32 vp_generation(struct virtio_device *vdev)
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{
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struct virtio_pci_device *vp_dev = to_vp_device(vdev);
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return ioread8(&vp_dev->common->config_generation);
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return vp_ioread8(&vp_dev->common->config_generation);
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}
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/* config->{get,set}_status() implementations */
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static u8 vp_get_status(struct virtio_device *vdev)
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{
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struct virtio_pci_device *vp_dev = to_vp_device(vdev);
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return ioread8(&vp_dev->common->device_status);
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return vp_ioread8(&vp_dev->common->device_status);
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}
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static void vp_set_status(struct virtio_device *vdev, u8 status)
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@ -262,17 +263,17 @@ static void vp_set_status(struct virtio_device *vdev, u8 status)
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struct virtio_pci_device *vp_dev = to_vp_device(vdev);
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/* We should never be setting status to 0. */
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BUG_ON(status == 0);
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iowrite8(status, &vp_dev->common->device_status);
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vp_iowrite8(status, &vp_dev->common->device_status);
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}
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static void vp_reset(struct virtio_device *vdev)
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{
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struct virtio_pci_device *vp_dev = to_vp_device(vdev);
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/* 0 status means a reset. */
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iowrite8(0, &vp_dev->common->device_status);
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vp_iowrite8(0, &vp_dev->common->device_status);
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/* Flush out the status write, and flush in device writes,
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* including MSI-X interrupts, if any. */
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ioread8(&vp_dev->common->device_status);
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vp_ioread8(&vp_dev->common->device_status);
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/* Flush pending VQ/configuration callbacks. */
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vp_synchronize_vectors(vdev);
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}
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@ -280,10 +281,10 @@ static void vp_reset(struct virtio_device *vdev)
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static u16 vp_config_vector(struct virtio_pci_device *vp_dev, u16 vector)
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{
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/* Setup the vector used for configuration events */
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iowrite16(vector, &vp_dev->common->msix_config);
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vp_iowrite16(vector, &vp_dev->common->msix_config);
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/* Verify we had enough resources to assign the vector */
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/* Will also flush the write out to device */
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return ioread16(&vp_dev->common->msix_config);
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return vp_ioread16(&vp_dev->common->msix_config);
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}
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static size_t vring_pci_size(u16 num)
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@ -323,15 +324,15 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
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u16 num, off;
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int err;
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if (index >= ioread16(&cfg->num_queues))
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if (index >= vp_ioread16(&cfg->num_queues))
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return ERR_PTR(-ENOENT);
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/* Select the queue we're interested in */
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iowrite16(index, &cfg->queue_select);
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vp_iowrite16(index, &cfg->queue_select);
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/* Check if queue is either not available or already active. */
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num = ioread16(&cfg->queue_size);
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if (!num || ioread16(&cfg->queue_enable))
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num = vp_ioread16(&cfg->queue_size);
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if (!num || vp_ioread16(&cfg->queue_enable))
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return ERR_PTR(-ENOENT);
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if (num & (num - 1)) {
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@ -340,7 +341,7 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
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}
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/* get offset of notification word for this vq */
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off = ioread16(&cfg->queue_notify_off);
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off = vp_ioread16(&cfg->queue_notify_off);
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info->num = num;
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info->msix_vector = msix_vec;
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@ -359,13 +360,13 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
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}
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/* activate the queue */
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iowrite16(num, &cfg->queue_size);
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iowrite64_twopart(virt_to_phys(info->queue),
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&cfg->queue_desc_lo, &cfg->queue_desc_hi);
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iowrite64_twopart(virt_to_phys(virtqueue_get_avail(vq)),
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&cfg->queue_avail_lo, &cfg->queue_avail_hi);
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iowrite64_twopart(virt_to_phys(virtqueue_get_used(vq)),
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&cfg->queue_used_lo, &cfg->queue_used_hi);
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vp_iowrite16(num, &cfg->queue_size);
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vp_iowrite64_twopart(virt_to_phys(info->queue),
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&cfg->queue_desc_lo, &cfg->queue_desc_hi);
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vp_iowrite64_twopart(virt_to_phys(virtqueue_get_avail(vq)),
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&cfg->queue_avail_lo, &cfg->queue_avail_hi);
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vp_iowrite64_twopart(virt_to_phys(virtqueue_get_used(vq)),
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&cfg->queue_used_lo, &cfg->queue_used_hi);
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if (vp_dev->notify_base) {
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/* offset should not wrap */
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@ -394,8 +395,8 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
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}
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if (msix_vec != VIRTIO_MSI_NO_VECTOR) {
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iowrite16(msix_vec, &cfg->queue_msix_vector);
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msix_vec = ioread16(&cfg->queue_msix_vector);
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vp_iowrite16(msix_vec, &cfg->queue_msix_vector);
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msix_vec = vp_ioread16(&cfg->queue_msix_vector);
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if (msix_vec == VIRTIO_MSI_NO_VECTOR) {
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err = -EBUSY;
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goto err_assign_vector;
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@ -430,8 +431,8 @@ static int vp_modern_find_vqs(struct virtio_device *vdev, unsigned nvqs,
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* this, there's no way to go back except reset.
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*/
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list_for_each_entry(vq, &vdev->vqs, list) {
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iowrite16(vq->index, &vp_dev->common->queue_select);
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iowrite16(1, &vp_dev->common->queue_enable);
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vp_iowrite16(vq->index, &vp_dev->common->queue_select);
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vp_iowrite16(1, &vp_dev->common->queue_enable);
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}
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return 0;
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@ -442,13 +443,13 @@ static void del_vq(struct virtio_pci_vq_info *info)
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struct virtqueue *vq = info->vq;
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struct virtio_pci_device *vp_dev = to_vp_device(vq->vdev);
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iowrite16(vq->index, &vp_dev->common->queue_select);
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vp_iowrite16(vq->index, &vp_dev->common->queue_select);
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if (vp_dev->msix_enabled) {
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iowrite16(VIRTIO_MSI_NO_VECTOR,
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&vp_dev->common->queue_msix_vector);
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vp_iowrite16(VIRTIO_MSI_NO_VECTOR,
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&vp_dev->common->queue_msix_vector);
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/* Flush the write out to device */
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ioread16(&vp_dev->common->queue_msix_vector);
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vp_ioread16(&vp_dev->common->queue_msix_vector);
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}
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if (!vp_dev->notify_base)
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