Michael S. Tsirkin
2021-Feb-23 12:52 UTC
[PATCH v2] vdpa/mlx5: Enable user to add/delete vdpa device
On Tue, Feb 23, 2021 at 02:33:04PM +0200, Eli Cohen wrote:> On Tue, Feb 23, 2021 at 07:29:32AM -0500, Michael S. Tsirkin wrote: > > On Thu, Feb 18, 2021 at 09:41:57AM +0200, 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> > > > > Not sure which tree this is for, I could not apply this. > > > > Depends on Parav's vdpa tool patches. We'll send the entire series again > - Parav's and my patches.I think I have them in the linux next branch, no?> > > --- > > > v0->v1: > > > set mgtdev->ndev NULL on dev delete > > > v1->v2: Resend > > > > > > 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[] = { > > > -- > > > 2.29.2 > >