drivers/net/ethernet/chelsio/cxgb3/cxgb3_defs.h

   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  */
  47 static 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
  53 static 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  */
  62 static 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  */
  74 static 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  */
  93 static 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
 109 int attach_t3cdev(struct t3cdev *dev);
 110 void detach_t3cdev(struct t3cdev *dev);
 111 #endif