linux/drivers/infiniband/hw/usnic/usnic_abi.h

/*
 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
 *
 * This program is free software; you may redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * 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 */