/*
* 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 <linux/module.h>
#include <linux/kernel.h>
#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;
}
/**
* rvt_alloc_ucontext - Allocate a user context
* @ibdev: Vers IB dev
* @data: User data allocated
*/
static struct ib_ucontext *rvt_alloc_ucontext(struct ib_device *ibdev,
struct ib_udata *udata)
{
return ERR_PTR(-EOPNOTSUPP);
}
/**
*rvt_dealloc_ucontext - Free a user context
*@context - Free this
*/
static int rvt_dealloc_ucontext(struct ib_ucontext *context)
{
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);
CHECK_DRIVER_OVERRIDE(rdi, alloc_ucontext);
CHECK_DRIVER_OVERRIDE(rdi, dealloc_ucontext);
/* Queue Pairs */
CHECK_DRIVER_OVERRIDE(rdi, create_qp);
CHECK_DRIVER_OVERRIDE(rdi, modify_qp);
CHECK_DRIVER_OVERRIDE(rdi, destroy_qp);
CHECK_DRIVER_OVERRIDE(rdi, query_qp);
/* 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);
