12:41 a.m.
+
+static int virtio_pmem_probe(struct virtio_device *vdev)
+{
+ int err = 0;
+ struct resource res;
+ struct virtio_pmem *vpmem;
+ struct nvdimm_bus *nvdimm_bus;
+ struct nd_region_desc ndr_desc = {};
+ int nid = dev_to_node(&vdev->dev);
+ struct nd_region *nd_region;
+
+ if (!vdev->config->get) {
+ dev_err(&vdev->dev, "%s failure: config disabled\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ vdev->priv = vpmem = devm_kzalloc(&vdev->dev, sizeof(*vpmem),
+ GFP_KERNEL);
+ if (!vpmem) {
+ err = -ENOMEM;
+ goto out_err;
+ }
+
+ vpmem->vdev = vdev;
+ err = init_vq(vpmem);
+ if (err)
+ goto out_err;
+
+ virtio_cread(vpmem->vdev, struct virtio_pmem_config,
+ start, &vpmem->start);
+ virtio_cread(vpmem->vdev, struct virtio_pmem_config,
+ size, &vpmem->size);
+
+ res.start = vpmem->start;
+ res.end = vpmem->start + vpmem->size-1;
+ vpmem->nd_desc.provider_name = "virtio-pmem";
+ vpmem->nd_desc.module = THIS_MODULE;
+
+ vpmem->nvdimm_bus = nvdimm_bus = nvdimm_bus_register(&vdev->dev,
+ &vpmem->nd_desc);
+ if (!nvdimm_bus)
+ goto out_vq;
+
+ dev_set_drvdata(&vdev->dev, nvdimm_bus);
+
+ ndr_desc.res = &res;
+ ndr_desc.numa_node = nid;
+ ndr_desc.flush = virtio_pmem_flush;
+ set_bit(ND_REGION_PAGEMAP, &ndr_desc.flags);
+ set_bit(ND_REGION_ASYNC, &ndr_desc.flags);
+ nd_region = nvdimm_pmem_region_create(nvdimm_bus, &ndr_desc);
+ nd_region->provider_data = dev_to_virtio
Pleas delete the extra space.
+ (nd_region->dev.parent->parent);
+
+ if (!nd_region)
+ goto out_nd;
+
+ return 0;
+out_nd:
+ err = -ENXIO;
+ nvdimm_bus_unregister(nvdimm_bus);
+out_vq:
+ vdev->config->del_vqs(vdev);
+out_err:
+ dev_err(&vdev->dev, "failed to register virtio pmem memory\n");
+ return err;
+}