/*
 * 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_IB_QP_GRP_H_
#define USNIC_IB_QP_GRP_H_

#include <linux/debugfs.h>
#include <rdma/ib_verbs.h>

#include "usnic_ib.h"
#include "usnic_abi.h"
#include "usnic_fwd.h"
#include "usnic_vnic.h"

/*
 * The qp group struct represents all the hw resources needed to present a ib_qp
 */
struct usnic_ib_qp_grp {
	struct ib_qp				ibqp;
	enum ib_qp_state			state;
	int					grp_id;

	struct usnic_fwd_dev			*ufdev;
	struct usnic_ib_ucontext		*ctx;
	struct list_head			flows_lst;

	struct usnic_vnic_res_chunk		**res_chunk_list;

	pid_t					owner_pid;
	struct usnic_ib_vf			*vf;
	struct list_head			link;

	spinlock_t				lock;

	struct kobject				kobj;
};

struct usnic_ib_qp_grp_flow {
	struct usnic_fwd_flow		*flow;
	enum usnic_transport_type	trans_type;
	union {
		struct {
			uint16_t	port_num;
		} usnic_roce;
		struct {
			struct socket	*sock;
		} udp;
	};
	struct usnic_ib_qp_grp		*qp_grp;
	struct list_head		link;

	/* Debug FS */
	struct dentry			*dbgfs_dentry;
	char				dentry_name[32];
};

static const struct
usnic_vnic_res_spec min_transport_spec[USNIC_TRANSPORT_MAX] = {
	{ /*USNIC_TRANSPORT_UNKNOWN*/
		.resources = {
			{.type = USNIC_VNIC_RES_TYPE_EOL,	.cnt = 0,},
		},
	},
	{ /*USNIC_TRANSPORT_ROCE_CUSTOM*/
		.resources = {
			{.type = USNIC_VNIC_RES_TYPE_WQ,	.cnt = 1,},
			{.type = USNIC_VNIC_RES_TYPE_RQ,	.cnt = 1,},
			{.type = USNIC_VNIC_RES_TYPE_CQ,	.cnt = 1,},
			{.type = USNIC_VNIC_RES_TYPE_EOL,	.cnt = 0,},
		},
	},
	{ /*USNIC_TRANSPORT_IPV4_UDP*/
		.resources = {
			{.type = USNIC_VNIC_RES_TYPE_WQ,	.cnt = 1,},
			{.type = USNIC_VNIC_RES_TYPE_RQ,	.cnt = 1,},
			{.type = USNIC_VNIC_RES_TYPE_CQ,	.cnt = 1,},
			{.type = USNIC_VNIC_RES_TYPE_EOL,	.cnt = 0,},
		},
	},
};

const char *usnic_ib_qp_grp_state_to_string(enum ib_qp_state state);
int usnic_ib_qp_grp_dump_hdr(char *buf, int buf_sz);
int usnic_ib_qp_grp_dump_rows(void *obj, char *buf, int buf_sz);
struct usnic_ib_qp_grp *
usnic_ib_qp_grp_create(struct usnic_fwd_dev *ufdev, struct usnic_ib_vf *vf,
			struct usnic_ib_pd *pd,
			struct usnic_vnic_res_spec *res_spec,
			struct usnic_transport_spec *trans_spec);
void usnic_ib_qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp);
int usnic_ib_qp_grp_modify(struct usnic_ib_qp_grp *qp_grp,
				enum ib_qp_state new_state,
				void *data);
struct usnic_vnic_res_chunk
*usnic_ib_qp_grp_get_chunk(struct usnic_ib_qp_grp *qp_grp,
				enum usnic_vnic_res_type type);
static inline
struct usnic_ib_qp_grp *to_uqp_grp(struct ib_qp *ibqp)
{
	return container_of(ibqp, struct usnic_ib_qp_grp, ibqp);
}
#endif /* USNIC_IB_QP_GRP_H_ */