Dropping to just linux-rdma list for a more details uABI discussion > As for the 'one char device', I actually think it would be really > simple. > > Add a new uverbs ioctl: > > int hfi1_fd = ioctl(uverbs_fd, RDMA_GET_DRIVER_OPS_FD, "psm2.intel.com"); > > ioctl(hfi1_fd, HFI1_IOCTL_ASSIGN_CTXT, ...); > write(hfi1_fd, ...); > > At least that gives us far better options for discovery and versioning > of this stuff than a driver-specific char device. I think it would help the discussion if the advantages/disadvantages of this approach were described over just opening a driver specific file. Because trying to form an application interface that's the union of hardware interfaces seems problematic. We _may_ be better thinking in terms if an Infiniband Core + iWarp Core + PSM Core (with appropriate code re-use between them), than viewing the entire world as RDMA Core. I say may because I haven't thought through the details. But from a high level, the IB core and PSM core appear to have basically no overlap. - Sean -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
