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authorParav Pandit <parav@nvidia.com>2021-01-05 13:32:03 +0300
committerMichael S. Tsirkin <mst@redhat.com>2021-02-23 15:52:56 +0300
commita3c06ae158dd6fa8336157c31d9234689d068d02 (patch)
treec42baff22c2a52bdbf734969e7499ad7f6115ede /drivers/vdpa
parentbc0d90ee021f1baecd6aaa010d787eb373aa74dd (diff)
downloadlinux-a3c06ae158dd6fa8336157c31d9234689d068d02.tar.xz
vdpa_sim_net: Add support for user supported devices
Enable user to create vdpasim net simulate devices. Show vdpa management device that supports creating, deleting vdpa devices. $ vdpa mgmtdev show vdpasim_net: supported_classes net $ vdpa mgmtdev show -jp { "show": { "vdpasim_net": { "supported_classes": { "net" } } } Create a vdpa device of type networking named as "foo2" from the management device vdpasim: $ vdpa dev add mgmtdev vdpasim_net name foo2 Show the newly created vdpa device by its name: $ vdpa dev show foo2 foo2: type network mgmtdev vdpasim_net vendor_id 0 max_vqs 2 max_vq_size 256 $ vdpa dev show foo2 -jp { "dev": { "foo2": { "type": "network", "mgmtdev": "vdpasim_net", "vendor_id": 0, "max_vqs": 2, "max_vq_size": 256 } } } Delete the vdpa device after its use: $ vdpa dev del foo2 Signed-off-by: Parav Pandit <parav@nvidia.com> Reviewed-by: Eli Cohen <elic@nvidia.com> Acked-by: Jason Wang <jasowang@redhat.com> Link: https://lore.kernel.org/r/20210105103203.82508-7-parav@nvidia.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vdpa')
-rw-r--r--drivers/vdpa/vdpa_sim/vdpa_sim.c3
-rw-r--r--drivers/vdpa/vdpa_sim/vdpa_sim.h2
-rw-r--r--drivers/vdpa/vdpa_sim/vdpa_sim_net.c96
3 files changed, 75 insertions, 26 deletions
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index db1636a99ba4..d5942842432d 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -235,7 +235,7 @@ struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *dev_attr)
ops = &vdpasim_config_ops;
vdpasim = vdpa_alloc_device(struct vdpasim, vdpa, NULL, ops,
- dev_attr->nvqs, NULL);
+ dev_attr->nvqs, dev_attr->name);
if (!vdpasim)
goto err_alloc;
@@ -249,6 +249,7 @@ struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *dev_attr)
if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
goto err_iommu;
set_dma_ops(dev, &vdpasim_dma_ops);
+ vdpasim->vdpa.mdev = dev_attr->mgmt_dev;
vdpasim->config = kzalloc(dev_attr->config_size, GFP_KERNEL);
if (!vdpasim->config)
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.h b/drivers/vdpa/vdpa_sim/vdpa_sim.h
index b02142293d5b..6d75444f9948 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.h
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.h
@@ -33,6 +33,8 @@ struct vdpasim_virtqueue {
};
struct vdpasim_dev_attr {
+ struct vdpa_mgmt_dev *mgmt_dev;
+ const char *name;
u64 supported_features;
size_t config_size;
size_t buffer_size;
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
index f0482427186b..d344c5b7c914 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
@@ -35,8 +35,6 @@ MODULE_PARM_DESC(macaddr, "Ethernet MAC address");
static u8 macaddr_buf[ETH_ALEN];
-static struct vdpasim *vdpasim_net_dev;
-
static void vdpasim_net_work(struct work_struct *work)
{
struct vdpasim *vdpasim = container_of(work, struct vdpasim, work);
@@ -120,21 +118,23 @@ static void vdpasim_net_get_config(struct vdpasim *vdpasim, void *config)
memcpy(net_config->mac, macaddr_buf, ETH_ALEN);
}
-static int __init vdpasim_net_init(void)
+static void vdpasim_net_mgmtdev_release(struct device *dev)
+{
+}
+
+static struct device vdpasim_net_mgmtdev = {
+ .init_name = "vdpasim_net",
+ .release = vdpasim_net_mgmtdev_release,
+};
+
+static int vdpasim_net_dev_add(struct vdpa_mgmt_dev *mdev, const char *name)
{
struct vdpasim_dev_attr dev_attr = {};
+ struct vdpasim *simdev;
int ret;
- if (macaddr) {
- mac_pton(macaddr, macaddr_buf);
- if (!is_valid_ether_addr(macaddr_buf)) {
- ret = -EADDRNOTAVAIL;
- goto out;
- }
- } else {
- eth_random_addr(macaddr_buf);
- }
-
+ dev_attr.mgmt_dev = mdev;
+ dev_attr.name = name;
dev_attr.id = VIRTIO_ID_NET;
dev_attr.supported_features = VDPASIM_NET_FEATURES;
dev_attr.nvqs = VDPASIM_NET_VQ_NUM;
@@ -143,29 +143,75 @@ static int __init vdpasim_net_init(void)
dev_attr.work_fn = vdpasim_net_work;
dev_attr.buffer_size = PAGE_SIZE;
- vdpasim_net_dev = vdpasim_create(&dev_attr);
- if (IS_ERR(vdpasim_net_dev)) {
- ret = PTR_ERR(vdpasim_net_dev);
- goto out;
+ simdev = vdpasim_create(&dev_attr);
+ if (IS_ERR(simdev))
+ return PTR_ERR(simdev);
+
+ ret = _vdpa_register_device(&simdev->vdpa);
+ if (ret)
+ goto reg_err;
+
+ return 0;
+
+reg_err:
+ put_device(&simdev->vdpa.dev);
+ return ret;
+}
+
+static void vdpasim_net_dev_del(struct vdpa_mgmt_dev *mdev,
+ struct vdpa_device *dev)
+{
+ struct vdpasim *simdev = container_of(dev, struct vdpasim, vdpa);
+
+ _vdpa_unregister_device(&simdev->vdpa);
+}
+
+static const struct vdpa_mgmtdev_ops vdpasim_net_mgmtdev_ops = {
+ .dev_add = vdpasim_net_dev_add,
+ .dev_del = vdpasim_net_dev_del
+};
+
+static struct virtio_device_id id_table[] = {
+ { VIRTIO_ID_NET, VIRTIO_DEV_ANY_ID },
+ { 0 },
+};
+
+static struct vdpa_mgmt_dev mgmt_dev = {
+ .device = &vdpasim_net_mgmtdev,
+ .id_table = id_table,
+ .ops = &vdpasim_net_mgmtdev_ops,
+};
+
+static int __init vdpasim_net_init(void)
+{
+ int ret;
+
+ if (macaddr) {
+ mac_pton(macaddr, macaddr_buf);
+ if (!is_valid_ether_addr(macaddr_buf))
+ return -EADDRNOTAVAIL;
+ } else {
+ eth_random_addr(macaddr_buf);
}
- ret = vdpa_register_device(&vdpasim_net_dev->vdpa);
+ ret = device_register(&vdpasim_net_mgmtdev);
if (ret)
- goto put_dev;
+ return ret;
+ ret = vdpa_mgmtdev_register(&mgmt_dev);
+ if (ret)
+ goto parent_err;
return 0;
-put_dev:
- put_device(&vdpasim_net_dev->vdpa.dev);
-out:
+parent_err:
+ device_unregister(&vdpasim_net_mgmtdev);
return ret;
}
static void __exit vdpasim_net_exit(void)
{
- struct vdpa_device *vdpa = &vdpasim_net_dev->vdpa;
-
- vdpa_unregister_device(vdpa);
+ vdpa_mgmtdev_unregister(&mgmt_dev);
+ device_unregister(&vdpasim_net_mgmtdev);
}
module_init(vdpasim_net_init);