LXR linux/drivers/net/ethernet/chelsio/cxgb3/cxgb3

   1/*
   2 * Copyright (c) 2006-2008 Chelsio, Inc. All rights reserved.
   3 *
   4 * This software is available to you under a choice of one of two
   5 * licenses.  You may choose to be licensed under the terms of the GNU
   6 * General Public License (GPL) Version 2, available from the file
   7 * COPYING in the main directory of this source tree, or the
   8 * OpenIB.org BSD license below:
   9 *
  10 *     Redistribution and use in source and binary forms, with or
  11 *     without modification, are permitted provided that the following
  12 *     conditions are met:
  13 *
  14 *      - Redistributions of source code must retain the above
  15 *        copyright notice, this list of conditions and the following
  16 *        disclaimer.
  17 *
  18 *      - Redistributions in binary form must reproduce the above
  19 *        copyright notice, this list of conditions and the following
  20 *        disclaimer in the documentation and/or other materials
  21 *        provided with the distribution.
  22 *
  23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30 * SOFTWARE.
  31 */
  32#ifndef _CHELSIO_DEFS_H
  33#define _CHELSIO_DEFS_H
  34
  35#include <linux/skbuff.h>
  36#include <net/tcp.h>
  37
  38#include "t3cdev.h"
  39
  40#include "cxgb3_offload.h"
  41
  42#define VALIDATE_TID 1
  43
  44/*
  45 * Map an ATID or STID to their entries in the corresponding TID tables.
  46 */
  47static inline union active_open_entry *atid2entry(const struct tid_info *t,
  48                                                  unsigned int atid)
  49{
  50        return &t->atid_tab[atid - t->atid_base];
  51}
  52
  53static inline union listen_entry *stid2entry(const struct tid_info *t,
  54                                             unsigned int stid)
  55{
  56        return &t->stid_tab[stid - t->stid_base];
  57}
  58
  59/*
  60 * Find the connection corresponding to a TID.
  61 */
  62static inline struct t3c_tid_entry *lookup_tid(const struct tid_info *t,
  63                                               unsigned int tid)
  64{
  65        struct t3c_tid_entry *t3c_tid = tid < t->ntids ?
  66            &(t->tid_tab[tid]) : NULL;
  67
  68        return (t3c_tid && t3c_tid->client) ? t3c_tid : NULL;
  69}
  70
  71/*
  72 * Find the connection corresponding to a server TID.
  73 */
  74static inline struct t3c_tid_entry *lookup_stid(const struct tid_info *t,
  75                                                unsigned int tid)
  76{
  77        union listen_entry *e;
  78
  79        if (tid < t->stid_base || tid >= t->stid_base + t->nstids)
  80                return NULL;
  81
  82        e = stid2entry(t, tid);
  83        if ((void *)e->next >= (void *)t->tid_tab &&
  84            (void *)e->next < (void *)&t->atid_tab[t->natids])
  85                return NULL;
  86
  87        return &e->t3c_tid;
  88}
  89
  90/*
  91 * Find the connection corresponding to an active-open TID.
  92 */
  93static inline struct t3c_tid_entry *lookup_atid(const struct tid_info *t,
  94                                                unsigned int tid)
  95{
  96        union active_open_entry *e;
  97
  98        if (tid < t->atid_base || tid >= t->atid_base + t->natids)
  99                return NULL;
 100
 101        e = atid2entry(t, tid);
 102        if ((void *)e->next >= (void *)t->tid_tab &&
 103            (void *)e->next < (void *)&t->atid_tab[t->natids])
 104                return NULL;
 105
 106        return &e->t3c_tid;
 107}
 108
 109int attach_t3cdev(struct t3cdev *dev);
 110void detach_t3cdev(struct t3cdev *dev);
 111#endif
 112