drivers/infiniband/hw/usnic/usnic_abi.h

/*
 * Copyright (c) 2013, Cisco Systems, 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
 * 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.
 *
 */


#ifndef USNIC_ABI_H
#define USNIC_ABI_H

/* ABI between userspace and kernel */
#define USNIC_UVERBS_ABI_VERSION	4

#define USNIC_QP_GRP_MAX_WQS		8
#define USNIC_QP_GRP_MAX_RQS		8
#define USNIC_QP_GRP_MAX_CQS		16

enum usnic_transport_type {
	USNIC_TRANSPORT_UNKNOWN		= 0,
	USNIC_TRANSPORT_ROCE_CUSTOM	= 1,
	USNIC_TRANSPORT_IPV4_UDP	= 2,
	USNIC_TRANSPORT_MAX		= 3,
};

struct usnic_transport_spec {
	enum usnic_transport_type	trans_type;
	union {
		struct {
			uint16_t	port_num;
		} usnic_roce;
		struct {
			uint32_t	sock_fd;
		} udp;
	};
};

struct usnic_ib_create_qp_cmd {
	struct usnic_transport_spec	spec;
};

/*TODO: Future - usnic_modify_qp needs to pass in generic filters */
struct usnic_ib_create_qp_resp {
	u32				vfid;
	u32				qp_grp_id;
	u64				bar_bus_addr;
	u32				bar_len;
/*
 * WQ, RQ, CQ are explicity specified bc exposing a generic resources inteface
 * expands the scope of ABI to many files.
 */
	u32				wq_cnt;
	u32				rq_cnt;
	u32				cq_cnt;
	u32				wq_idx[USNIC_QP_GRP_MAX_WQS];
	u32				rq_idx[USNIC_QP_GRP_MAX_RQS];
	u32				cq_idx[USNIC_QP_GRP_MAX_CQS];
	u32				transport;
	u32				reserved[9];
};

#endif /* USNIC_ABI_H */