xref: /kernel/linux/linux-6.6/drivers/net/ethernet/chelsio/cxgb3/cxgb3_defs.h

/*
 * Copyright (c) 2006-2008 Chelsio, 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.
 */
#ifndef _CHELSIO_DEFS_H
#define _CHELSIO_DEFS_H

#include <linux/skbuff.h>
#include <net/tcp.h>

#include "t3cdev.h"

#include "cxgb3_offload.h"

#define VALIDATE_TID 1

/*
 * Map an ATID or STID to their entries in the corresponding TID tables.
 */
static inline union active_open_entry *atid2entry(const struct tid_info *t,
						  unsigned int atid)
{
	return &t->atid_tab[atid - t->atid_base];
}

static inline union listen_entry *stid2entry(const struct tid_info *t,
					     unsigned int stid)
{
	return &t->stid_tab[stid - t->stid_base];
}

/*
 * Find the connection corresponding to a TID.
 */
static inline struct t3c_tid_entry *lookup_tid(const struct tid_info *t,
					       unsigned int tid)
{
	struct t3c_tid_entry *t3c_tid = tid < t->ntids ?
	    &(t->tid_tab[tid]) : NULL;

	return (t3c_tid && t3c_tid->client) ? t3c_tid : NULL;
}

/*
 * Find the connection corresponding to a server TID.
 */
static inline struct t3c_tid_entry *lookup_stid(const struct tid_info *t,
						unsigned int tid)
{
	union listen_entry *e;

	if (tid < t->stid_base || tid >= t->stid_base + t->nstids)
		return NULL;

	e = stid2entry(t, tid);
	if ((void *)e->next >= (void *)t->tid_tab &&
	    (void *)e->next < (void *)&t->atid_tab[t->natids])
		return NULL;

	return &e->t3c_tid;
}

/*
 * Find the connection corresponding to an active-open TID.
 */
static inline struct t3c_tid_entry *lookup_atid(const struct tid_info *t,
						unsigned int tid)
{
	union active_open_entry *e;

	if (tid < t->atid_base || tid >= t->atid_base + t->natids)
		return NULL;

	e = atid2entry(t, tid);
	if ((void *)e->next >= (void *)t->tid_tab &&
	    (void *)e->next < (void *)&t->atid_tab[t->natids])
		return NULL;

	return &e->t3c_tid;
}

int attach_t3cdev(struct t3cdev *dev);
void detach_t3cdev(struct t3cdev *dev);
#endif