On Tue, Jan 17, 2017 at 11:27:20AM -0800, Vishwanathapura, Niranjana wrote:
> Thanks Jason for the valuable inputs.
>
> Here is the new generic interface.
>
> Overview:
> Bottom driver defines net_device_ops. The upper driver can override it.
> For example, upper driver can implement ndo_open() which calls bottom
> driver's ndo_open() and also do some book keeping.
>
>
> include/rdma/ib_verbs.h:
>
> /* rdma netdev type - specifies protocol type */
> enum rdma_netdev_t {
> RDMA_NETDEV_HFI_VNIC,
> };
>
> /* rdma netdev
> * For usecases where netstack interfacing is required.
> */
> struct rdma_netdev {
> struct net_device *netdev;
> u8 port_num;
>
> /* client private data structure */
> void *clnt_priv;
>
> /* control functions */
> void (*set_id)(struct rdma_netdev *rn, int id);
> void (*set_state)(struct rdma_netdev *rn, int state);
> };
>
> struct ib_device {
> ...
> ...
> /* rdma netdev operations */
> struct net_device *(*alloc_rdma_netdev)(struct ib_device *device,
> u8 port_num,
> enum rdma_netdev_t type,
> const char *name,
> unsigned char name_assign_type,
> void (*setup)(struct net_device *));
> void (*free_rdma_netdev)(struct net_device *netdev);
> };
>
>
> hfi1 driver:
>
> /* rdma netdev's private data structure */
> struct hfi1_rdma_netdev {
> struct rdma_netdev rn; /* keep this first */
> /* hfi1's vnic private data follows */
> };
>
>
> include/rdma/opa_hfi.h:
>
> /* Client's ndo operations use below function instead of netdev_priv() */
> static inline void *hfi_vnic_priv(const struct net_device *dev)
> {
> struct rdma_netdev *rn = netdev_priv(dev);
>
> return rn->clnt_priv;
> }
>
> /* Overrides rtnl_link_stats64 to include hfi_vnic stats.
> * ndo_get_stats64() can be used to get the stats
> */
> struct hfi_vnic_stats {
> /* standard netdev statistics */
> struct rtnl_link_stats64 netstat;
>
> /* HFI VNIC statistics */
> u64 tx_mcastbcast;
> u64 tx_untagged;
> u64 tx_vlan;
> u64 tx_64_size;
> u64 tx_65_127;
> u64 tx_128_255;
> u64 tx_256_511;
> u64 tx_512_1023;
> u64 tx_1024_1518;
> u64 tx_1519_max;
>
> u64 rx_untagged;
> u64 rx_vlan;
> u64 rx_64_size;
> u64 rx_65_127;
> u64 rx_128_255;
> u64 rx_256_511;
> u64 rx_512_1023;
> u64 rx_1024_1518;
> u64 rx_1519_max;
>
> u64 rx_runt;
> u64 rx_oversize;
> };
>
> I have started working on porting hfi_vnic as per this new interface.
> I will post RFC v3 later.
> Posting the interface definition early for comments.I wonder how many people will comment it without seeing usage example. > > Thanks, > Niranjana >
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