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SubjectRe: [PATCH v2 06/17] vdpa_sim: add struct vdpasim_dev_attr for device attributes
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On 2020/11/26 下午10:49, Stefano Garzarella wrote:
> vdpasim_dev_attr will contain device specific attributes. We starting
> moving the number of virtqueues (i.e. nvqs) to vdpasim_dev_attr.
>
> vdpasim_create() creates a new vDPA simulator following the device
> attributes defined in the vdpasim_dev_attr parameter.
>
> Co-developed-by: Max Gurtovoy <mgurtovoy@nvidia.com>
> Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
> ---
> drivers/vdpa/vdpa_sim/vdpa_sim.c | 25 +++++++++++++++++--------
> 1 file changed, 17 insertions(+), 8 deletions(-)


Acked-by: Jason Wang <jasowang@redhat.com>


>
> diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> index 62204e064841..f98262add0e1 100644
> --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
> +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> @@ -55,11 +55,16 @@ static u64 vdpasim_features = (1ULL << VIRTIO_F_ANY_LAYOUT) |
> (1ULL << VIRTIO_F_ACCESS_PLATFORM) |
> (1ULL << VIRTIO_NET_F_MAC);
>
> +struct vdpasim_dev_attr {
> + int nvqs;
> +};
> +
> /* State of each vdpasim device */
> struct vdpasim {
> struct vdpa_device vdpa;
> struct vdpasim_virtqueue *vqs;
> struct work_struct work;
> + struct vdpasim_dev_attr dev_attr;
> /* spinlock to synchronize virtqueue state */
> spinlock_t lock;
> struct virtio_net_config config;
> @@ -68,7 +73,6 @@ struct vdpasim {
> u32 status;
> u32 generation;
> u64 features;
> - int nvqs;
> /* spinlock to synchronize iommu table */
> spinlock_t iommu_lock;
> };
> @@ -133,7 +137,7 @@ static void vdpasim_reset(struct vdpasim *vdpasim)
> {
> int i;
>
> - for (i = 0; i < vdpasim->nvqs; i++)
> + for (i = 0; i < vdpasim->dev_attr.nvqs; i++)
> vdpasim_vq_reset(&vdpasim->vqs[i]);
>
> spin_lock(&vdpasim->iommu_lock);
> @@ -334,7 +338,7 @@ static const struct dma_map_ops vdpasim_dma_ops = {
> static const struct vdpa_config_ops vdpasim_config_ops;
> static const struct vdpa_config_ops vdpasim_batch_config_ops;
>
> -static struct vdpasim *vdpasim_create(void)
> +static struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *dev_attr)
> {
> const struct vdpa_config_ops *ops;
> struct vdpasim *vdpasim;
> @@ -346,11 +350,12 @@ static struct vdpasim *vdpasim_create(void)
> else
> ops = &vdpasim_config_ops;
>
> - vdpasim = vdpa_alloc_device(struct vdpasim, vdpa, NULL, ops, VDPASIM_VQ_NUM);
> + vdpasim = vdpa_alloc_device(struct vdpasim, vdpa, NULL, ops,
> + dev_attr->nvqs);
> if (!vdpasim)
> goto err_alloc;
>
> - vdpasim->nvqs = VDPASIM_VQ_NUM;
> + vdpasim->dev_attr = *dev_attr;
> INIT_WORK(&vdpasim->work, vdpasim_work);
> spin_lock_init(&vdpasim->lock);
> spin_lock_init(&vdpasim->iommu_lock);
> @@ -361,7 +366,7 @@ static struct vdpasim *vdpasim_create(void)
> goto err_iommu;
> set_dma_ops(dev, &vdpasim_dma_ops);
>
> - vdpasim->vqs = kcalloc(vdpasim->nvqs, sizeof(struct vdpasim_virtqueue),
> + vdpasim->vqs = kcalloc(dev_attr->nvqs, sizeof(struct vdpasim_virtqueue),
> GFP_KERNEL);
> if (!vdpasim->vqs)
> goto err_iommu;
> @@ -384,7 +389,7 @@ static struct vdpasim *vdpasim_create(void)
> eth_random_addr(vdpasim->config.mac);
> }
>
> - for (i = 0; i < vdpasim->nvqs; i++)
> + for (i = 0; i < dev_attr->nvqs; i++)
> vringh_set_iotlb(&vdpasim->vqs[i].vring, vdpasim->iommu);
>
> vdpasim->vdpa.dma_dev = dev;
> @@ -712,7 +717,11 @@ static const struct vdpa_config_ops vdpasim_batch_config_ops = {
>
> static int __init vdpasim_dev_init(void)
> {
> - vdpasim_dev = vdpasim_create();
> + struct vdpasim_dev_attr dev_attr = {};
> +
> + dev_attr.nvqs = VDPASIM_VQ_NUM;
> +
> + vdpasim_dev = vdpasim_create(&dev_attr);
>
> if (!IS_ERR(vdpasim_dev))
> return 0;

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