Parav Pandit
2021-Jan-05 10:32 UTC
[PATCH linux-next v3 6/6] 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 at nvidia.com>
Reviewed-by: Eli Cohen <elic at nvidia.com>
Acked-by: Jason Wang <jasowang at redhat.com>
---
Changelog:
v2->v3:
- removed code branches due to default device removal patch
v1->v2:
- rebased
---
drivers/vdpa/vdpa_sim/vdpa_sim.c | 3 +-
drivers/vdpa/vdpa_sim/vdpa_sim.h | 2 +
drivers/vdpa/vdpa_sim/vdpa_sim_net.c | 96 ++++++++++++++++++++--------
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);
--
2.26.2
Michael S. Tsirkin
2021-Jan-05 11:48 UTC
[PATCH linux-next v3 6/6] vdpa_sim_net: Add support for user supported devices
On Tue, Jan 05, 2021 at 12:32:03PM +0200, Parav Pandit wrote:> 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 > } > } > }I'd like an example of how do device specific (e.g. net specific) interfaces tie in to this.> Delete the vdpa device after its use: > $ vdpa dev del foo2 > > Signed-off-by: Parav Pandit <parav at nvidia.com> > Reviewed-by: Eli Cohen <elic at nvidia.com> > Acked-by: Jason Wang <jasowang at redhat.com> > --- > Changelog: > v2->v3: > - removed code branches due to default device removal patch > v1->v2: > - rebased > --- > drivers/vdpa/vdpa_sim/vdpa_sim.c | 3 +- > drivers/vdpa/vdpa_sim/vdpa_sim.h | 2 + > drivers/vdpa/vdpa_sim/vdpa_sim_net.c | 96 ++++++++++++++++++++-------- > 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); > }Hmm so all devices start out with the same MAC until changed? And how is the change effected?> - 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); > -- > 2.26.2