path: root/drivers/infiniband/core/uverbs_main.c

/*
 * Copyright (c) 2005 Topspin Communications.  All rights reserved.
 * Copyright (c) 2005, 2006 Cisco Systems.  All rights reserved.
 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
 * Copyright (c) 2005 PathScale, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     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.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/fs.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/file.h>
#include <linux/cdev.h>
#include <linux/anon_inodes.h>
#include <linux/slab.h>

#include <linux/uaccess.h>

#include <rdma/ib.h>
#include <rdma/uverbs_std_types.h>

#include "uverbs.h"
#include "core_priv.h"
#include "rdma_core.h"

MODULE_AUTHOR("Roland Dreier");
MODULE_DESCRIPTION("InfiniBand userspace verbs access");
MODULE_LICENSE("Dual BSD/GPL");

enum {
	IB_UVERBS_MAJOR       = 231,
	IB_UVERBS_BASE_MINOR  = 192,
	IB_UVERBS_MAX_DEVICES = RDMA_MAX_PORTS,
	IB_UVERBS_NUM_FIXED_MINOR = 32,
	IB_UVERBS_NUM_DYNAMIC_MINOR = IB_UVERBS_MAX_DEVICES - IB_UVERBS_NUM_FIXED_MINOR,
};

#define IB_UVERBS_BASE_DEV	MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR)

static dev_t dynamic_uverbs_dev;
static struct class *uverbs_class;

static DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES);

static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file,
				     const char __user *buf, int in_len,
				     int out_len) = {
	[IB_USER_VERBS_CMD_GET_CONTEXT]		= ib_uverbs_get_context,
	[IB_USER_VERBS_CMD_QUERY_DEVICE]	= ib_uverbs_query_device,
	[IB_USER_VERBS_CMD_QUERY_PORT]		= ib_uverbs_query_port,
	[IB_USER_VERBS_CMD_ALLOC_PD]		= ib_uverbs_alloc_pd,
	[IB_USER_VERBS_CMD_DEALLOC_PD]		= ib_uverbs_dealloc_pd,
	[IB_USER_VERBS_CMD_REG_MR]		= ib_uverbs_reg_mr,
	[IB_USER_VERBS_CMD_REREG_MR]		= ib_uverbs_rereg_mr,
	[IB_USER_VERBS_CMD_DEREG_MR]		= ib_uverbs_dereg_mr,
	[IB_USER_VERBS_CMD_ALLOC_MW]		= ib_uverbs_alloc_mw,
	[IB_USER_VERBS_CMD_DEALLOC_MW]		= ib_uverbs_dealloc_mw,
	[IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL] = ib_uverbs_create_comp_channel,
	[IB_USER_VERBS_CMD_CREATE_CQ]		= ib_uverbs_create_cq,
	[IB_USER_VERBS_CMD_RESIZE_CQ]		= ib_uverbs_resize_cq,
	[IB_USER_VERBS_CMD_POLL_CQ]		= ib_uverbs_poll_cq,
	[IB_USER_VERBS_CMD_REQ_NOTIFY_CQ]	= ib_uverbs_req_notify_cq,
	[IB_USER_VERBS_CMD_DESTROY_CQ]		= ib_uverbs_destroy_cq,
	[IB_USER_VERBS_CMD_CREATE_QP]		= ib_uverbs_create_qp,
	[IB_USER_VERBS_CMD_QUERY_QP]		= ib_uverbs_query_qp,
	[IB_USER_VERBS_CMD_MODIFY_QP]		= ib_uverbs_modify_qp,
	[IB_USER_VERBS_CMD_DESTROY_QP]		= ib_uverbs_destroy_qp,
	[IB_USER_VERBS_CMD_POST_SEND]		= ib_uverbs_post_send,
	[IB_USER_VERBS_CMD_POST_RECV]		= ib_uverbs_post_recv,
	[IB_USER_VERBS_CMD_POST_SRQ_RECV]	= ib_uverbs_post_srq_recv,
	[IB_USER_VERBS_CMD_CREATE_AH]		= ib_uverbs_create_ah,
	[IB_USER_VERBS_CMD_DESTROY_AH]		= ib_uverbs_destroy_ah,
	[IB_USER_VERBS_CMD_ATTACH_MCAST]	= ib_uverbs_attach_mcast,
	[IB_USER_VERBS_CMD_DETACH_MCAST]	= ib_uverbs_detach_mcast,
	[IB_USER_VERBS_CMD_CREATE_SRQ]		= ib_uverbs_create_srq,
	[IB_USER_VERBS_CMD_MODIFY_SRQ]		= ib_uverbs_modify_srq,
	[IB_USER_VERBS_CMD_QUERY_SRQ]		= ib_uverbs_query_srq,
	[IB_USER_VERBS_CMD_DESTROY_SRQ]		= ib_uverbs_destroy_srq,
	[IB_USER_VERBS_CMD_OPEN_XRCD]		= ib_uverbs_open_xrcd,
	[IB_USER_VERBS_CMD_CLOSE_XRCD]		= ib_uverbs_close_xrcd,
	[IB_USER_VERBS_CMD_CREATE_XSRQ