/* * Copyright(c) 2015 Intel Corporation. * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. * * GPL LICENSE SUMMARY * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * BSD LICENSE * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * - Neither the name of Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #include #include #include "vt.h" MODULE_LICENSE("Dual BSD/GPL"); MODULE_DESCRIPTION("RDMA Verbs Transport Library"); static int rvt_init(void) { /* Do any work needed prior to drivers calling for registration*/ return 0; } module_init(rvt_init); static void rvt_cleanup(void) { } module_exit(rvt_cleanup); static int rvt_query_device(struct ib_device *ibdev, struct ib_device_attr *props, struct ib_udata *uhw) { /* * Return rvt_dev_info.props contents */ return -EOPNOTSUPP; } static int rvt_modify_device(struct ib_device *device, int device_modify_mask, struct ib_device_modify *device_modify) { /* * Change dev props. Planned support is for node desc change and sys * guid change only. This matches hfi1 and qib behavior. Other drivers * that support existing modifications will need to add their support. */ /* * VT-DRIVER-API: node_desc_change() * VT-DRIVER-API: sys_guid_change() */ return -EOPNOTSUPP; } /** * rvt_query_port: Passes the query port call to the driver * @ibdev: Verbs IB dev * @port: port number * @props: structure to hold returned properties * * Returns 0 on success */ static int rvt_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *props) { /* * VT-DRIVER-API: query_port_state() * driver returns pretty much everything in ib_port_attr */ return -EOPNOTSUPP; } /** * rvt_modify_port * @ibdev: Verbs IB dev * @port: Port number * @port_modify_mask: How to change the port * @props: Structure to fill in * * Returns 0 on success */ static int rvt_modify_port(struct ib_device *ibdev, u8 port, int port_modify_mask, struct ib_port_modify *props) { /* * VT-DRIVER-API: set_link_state() * driver will set the link state using the IB enumeration * * VT-DRIVER-API: clear_qkey_violations() * clears driver private qkey counter * * VT-DRIVER-API: get_lid() * driver needs to return the LID * * TBD: send_trap() and post_mad_send() need examined to see where they * fit in. */ return -EOPNOTSUPP; } /** * rvt_query_pkey - Return a pkey from the table at a given index * @ibdev: Verbs IB dev * @port: Port number * @intex: Index into pkey table * * Returns 0 on failure pkey otherwise */ static int rvt_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey) { /* * Driver will be responsible for keeping rvt_dev_info.pkey_table up to * date. This function will just return that value. There is no need to * lock, if a stale value is read and sent to the user so be it there is * no way to protect against that anyway. */ return 0; } /** * rvt_query_gid - Return a gid from the table * @ibdev: Verbs IB dev * @port: Port number * @index: = Index in table * @gid: Gid to return * * Returns 0 on success */ static int rvt_query_gid(struct ib_device *ibdev, u8 port, int index, union ib_gid *gid) { /* * Driver is responsible for updating the guid table. Which will be used * to craft the return value. This will work similar to how query_pkey() * is being done. */ return -EOPNOTSUPP; } /* * Check driver override. If driver passes a value use it, otherwise we use our * own value. */ #define CHECK_DRIVER_OVERRIDE(rdi, x) \ rdi->ibdev.x = rdi->ibdev.x ? : rvt_ ##x int rvt_register_device(struct rvt_dev_info *rdi) { if (!rdi) return -EINVAL; /* Dev Ops */ CHECK_DRIVER_OVERRIDE(rdi, query_device); CHECK_DRIVER_OVERRIDE(rdi, modify_device); CHECK_DRIVER_OVERRIDE(rdi, query_port); CHECK_DRIVER_OVERRIDE(rdi, modify_port); CHECK_DRIVER_OVERRIDE(rdi, query_pkey); CHECK_DRIVER_OVERRIDE(rdi, query_gid); /* DMA Operations */ rdi->ibdev.dma_ops = rdi->ibdev.dma_ops ? : &rvt_default_dma_mapping_ops; /* Protection Domain */ CHECK_DRIVER_OVERRIDE(rdi, alloc_pd); CHECK_DRIVER_OVERRIDE(rdi, dealloc_pd); spin_lock_init(&rdi->n_pds_lock); rdi->n_pds_allocated = 0; /* We are now good to announce we exist */ return ib_register_device(&rdi->ibdev, rdi->port_callback); } EXPORT_SYMBOL(rvt_register_device); void rvt_unregister_device(struct rvt_dev_info *rdi) { if (!rdi) return; ib_unregister_device(&rdi->ibdev); } EXPORT_SYMBOL(rvt_unregister_device);