diff options
| author | Stefano Garzarella <sgarzare@redhat.com> | 2020-12-15 17:42:49 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-23 17:53:22 +0300 |
| commit | 8faf3ea12225337d07623f61349cba9b6d78500b (patch) | |
| tree | b75a38868033861652085a40fbab7a8477f73207 /drivers/vdpa | |
| parent | 0fb67eda6a9c67e206d87d5a68f424d4316fa74d (diff) | |
| download | linux-8faf3ea12225337d07623f61349cba9b6d78500b.tar.xz | |
vdpa_sim: make 'config' generic and usable for any device type
commit f37cbbc65178e0a45823d281d290c4c02da9631c upstream.
Add new 'config_size' attribute in 'vdpasim_dev_attr' and allocates
'config' dynamically to support any device types.
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20201215144256.155342-12-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/vdpa')
| -rw-r--r-- | drivers/vdpa/vdpa_sim/vdpa_sim.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c index bc27fa485c3e..d9c494455156 100644 --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c @@ -70,6 +70,7 @@ static u64 vdpasim_features = (1ULL << VIRTIO_F_ANY_LAYOUT) | (1ULL << VIRTIO_NET_F_MAC); struct vdpasim_dev_attr { + size_t config_size; int nvqs; }; @@ -81,7 +82,8 @@ struct vdpasim { struct vdpasim_dev_attr dev_attr; /* spinlock to synchronize virtqueue state */ spinlock_t lock; - struct virtio_net_config config; + /* virtio config according to device type */ + void *config; struct vhost_iotlb *iommu; void *buffer; u32 status; @@ -380,6 +382,10 @@ static struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *dev_attr) goto err_iommu; set_dma_ops(dev, &vdpasim_dma_ops); + vdpasim->config = kzalloc(dev_attr->config_size, GFP_KERNEL); + if (!vdpasim->config) + goto err_iommu; + vdpasim->vqs = kcalloc(dev_attr->nvqs, sizeof(struct vdpasim_virtqueue), GFP_KERNEL); if (!vdpasim->vqs) @@ -518,7 +524,8 @@ static u64 vdpasim_get_features(struct vdpa_device *vdpa) static int vdpasim_set_features(struct vdpa_device *vdpa, u64 features) { struct vdpasim *vdpasim = vdpa_to_sim(vdpa); - struct virtio_net_config *config = &vdpasim->config; + struct virtio_net_config *config = + (struct virtio_net_config *)vdpasim->config; /* DMA mapping must be done by driver */ if (!(features & (1ULL << VIRTIO_F_ACCESS_PLATFORM))) @@ -588,8 +595,8 @@ static void vdpasim_get_config(struct vdpa_device *vdpa, unsigned int offset, { struct vdpasim *vdpasim = vdpa_to_sim(vdpa); - if (offset + len < sizeof(struct virtio_net_config)) - memcpy(buf, (u8 *)&vdpasim->config + offset, len); + if (offset + len < vdpasim->dev_attr.config_size) + memcpy(buf, vdpasim->config + offset, len); } static void vdpasim_set_config(struct vdpa_device *vdpa, unsigned int offset, @@ -676,6 +683,7 @@ static void vdpasim_free(struct vdpa_device *vdpa) if (vdpasim->iommu) vhost_iotlb_free(vdpasim->iommu); kfree(vdpasim->vqs); + kfree(vdpasim->config); } static const struct vdpa_config_ops vdpasim_net_config_ops = { @@ -736,6 +744,7 @@ static int __init vdpasim_dev_init(void) struct vdpasim_dev_attr dev_attr = {}; dev_attr.nvqs = VDPASIM_VQ_NUM; + dev_attr.config_size = sizeof(struct virtio_net_config); vdpasim_dev = vdpasim_create(&dev_attr); |