Jason Wang
2021-Feb-23 02:40 UTC
[PATCH 2/2 v1] vdpa/mlx5: Enable user to add/delete vdpa device
On 2021/2/17 7:31 ??, Eli Cohen wrote:> Allow to control vdpa device creation and destruction using the vdpa > management tool. > > Examples: > 1. List the management devices > $ vdpa mgmtdev show > pci/0000:3b:00.1: > supported_classes net > > 2. Create vdpa instance > $ vdpa dev add mgmtdev pci/0000:3b:00.1 name vdpa0 > > 3. Show vdpa devices > $ vdpa dev show > vdpa0: type network mgmtdev pci/0000:3b:00.1 vendor_id 5555 max_vqs 16 \ > max_vq_size 256 > > Signed-off-by: Eli Cohen <elic at nvidia.com> > Reviewed-by: Parav Pandit <parav at nvidia.com>Acked-by: Jason Wang <jasowang at redhat.com>> --- > v0->v1: > set mgtdev->ndev NULL on dev delete > > drivers/vdpa/mlx5/net/mlx5_vnet.c | 79 +++++++++++++++++++++++++++---- > 1 file changed, 70 insertions(+), 9 deletions(-) > > diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c > index a51b0f86afe2..08fb481ddc4f 100644 > --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c > +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c > @@ -1974,23 +1974,32 @@ static void init_mvqs(struct mlx5_vdpa_net *ndev) > } > } > > -static int mlx5v_probe(struct auxiliary_device *adev, > - const struct auxiliary_device_id *id) > +struct mlx5_vdpa_mgmtdev { > + struct vdpa_mgmt_dev mgtdev; > + struct mlx5_adev *madev; > + struct mlx5_vdpa_net *ndev; > +}; > + > +static int mlx5_vdpa_dev_add(struct vdpa_mgmt_dev *v_mdev, const char *name) > { > - struct mlx5_adev *madev = container_of(adev, struct mlx5_adev, adev); > - struct mlx5_core_dev *mdev = madev->mdev; > + struct mlx5_vdpa_mgmtdev *mgtdev = container_of(v_mdev, struct mlx5_vdpa_mgmtdev, mgtdev); > struct virtio_net_config *config; > struct mlx5_vdpa_dev *mvdev; > struct mlx5_vdpa_net *ndev; > + struct mlx5_core_dev *mdev; > u32 max_vqs; > int err; > > + if (mgtdev->ndev) > + return -ENOSPC; > + > + mdev = mgtdev->madev->mdev; > /* we save one virtqueue for control virtqueue should we require it */ > max_vqs = MLX5_CAP_DEV_VDPA_EMULATION(mdev, max_num_virtio_queues); > max_vqs = min_t(u32, max_vqs, MLX5_MAX_SUPPORTED_VQS); > > ndev = vdpa_alloc_device(struct mlx5_vdpa_net, mvdev.vdev, mdev->device, &mlx5_vdpa_ops, > - 2 * mlx5_vdpa_max_qps(max_vqs), NULL); > + 2 * mlx5_vdpa_max_qps(max_vqs), name); > if (IS_ERR(ndev)) > return PTR_ERR(ndev); > > @@ -2018,11 +2027,12 @@ static int mlx5v_probe(struct auxiliary_device *adev, > if (err) > goto err_res; > > - err = vdpa_register_device(&mvdev->vdev); > + mvdev->vdev.mdev = &mgtdev->mgtdev; > + err = _vdpa_register_device(&mvdev->vdev); > if (err) > goto err_reg; > > - dev_set_drvdata(&adev->dev, ndev); > + mgtdev->ndev = ndev; > return 0; > > err_reg: > @@ -2035,11 +2045,62 @@ static int mlx5v_probe(struct auxiliary_device *adev, > return err; > } > > +static void mlx5_vdpa_dev_del(struct vdpa_mgmt_dev *v_mdev, struct vdpa_device *dev) > +{ > + struct mlx5_vdpa_mgmtdev *mgtdev = container_of(v_mdev, struct mlx5_vdpa_mgmtdev, mgtdev); > + > + _vdpa_unregister_device(dev); > + mgtdev->ndev = NULL; > +} > + > +static const struct vdpa_mgmtdev_ops mdev_ops = { > + .dev_add = mlx5_vdpa_dev_add, > + .dev_del = mlx5_vdpa_dev_del, > +}; > + > +static struct virtio_device_id id_table[] = { > + { VIRTIO_ID_NET, VIRTIO_DEV_ANY_ID }, > + { 0 }, > +}; > + > +static int mlx5v_probe(struct auxiliary_device *adev, > + const struct auxiliary_device_id *id) > + > +{ > + struct mlx5_adev *madev = container_of(adev, struct mlx5_adev, adev); > + struct mlx5_core_dev *mdev = madev->mdev; > + struct mlx5_vdpa_mgmtdev *mgtdev; > + int err; > + > + mgtdev = kzalloc(sizeof(*mgtdev), GFP_KERNEL); > + if (!mgtdev) > + return -ENOMEM; > + > + mgtdev->mgtdev.ops = &mdev_ops; > + mgtdev->mgtdev.device = mdev->device; > + mgtdev->mgtdev.id_table = id_table; > + mgtdev->madev = madev; > + > + err = vdpa_mgmtdev_register(&mgtdev->mgtdev); > + if (err) > + goto reg_err; > + > + dev_set_drvdata(&adev->dev, mgtdev); > + > + return 0; > + > +reg_err: > + kfree(mdev); > + return err; > +} > + > static void mlx5v_remove(struct auxiliary_device *adev) > { > - struct mlx5_vdpa_dev *mvdev = dev_get_drvdata(&adev->dev); > + struct mlx5_vdpa_mgmtdev *mgtdev; > > - vdpa_unregister_device(&mvdev->vdev); > + mgtdev = dev_get_drvdata(&adev->dev); > + vdpa_mgmtdev_unregister(&mgtdev->mgtdev); > + kfree(mgtdev); > } > > static const struct auxiliary_device_id mlx5v_id_table[] = {