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 void *cxgb_alloc_mem(unsigned long size);
  45 void cxgb_free_mem(void *addr);
  46
  47 /*
  48  * Map an ATID or STID to their entries in the corresponding TID tables.
  49  */
  50 static inline union active_open_entry *atid2entry(const struct tid_info *t,
  51                                                   unsigned int atid)
  52 {
  53         return &t->atid_tab[atid - t->atid_base];
  54 }
  55
  56 static inline union listen_entry *stid2entry(const struct tid_info *t,
  57                                              unsigned int stid)
  58 {
  59         return &t->stid_tab[stid - t->stid_base];
  60 }
  61
  62 /*
  63  * Find the connection corresponding to a TID.
  64  */
  65 static inline struct t3c_tid_entry *lookup_tid(const struct tid_info *t,
  66                                                unsigned int tid)
  67 {
  68         struct t3c_tid_entry *t3c_tid = tid < t->ntids ?
  69             &(t->tid_tab[tid]) : NULL;
  70
  71         return (t3c_tid && t3c_tid->client) ? t3c_tid : NULL;
  72 }
  73
  74 /*
  75  * Find the connection corresponding to a server TID.
  76  */
  77 static inline struct t3c_tid_entry *lookup_stid(const struct tid_info *t,
  78                                                 unsigned int tid)
  79 {
  80         union listen_entry *e;
  81
  82         if (tid < t->stid_base || tid >= t->stid_base + t->nstids)
  83                 return NULL;
  84
  85         e = stid2entry(t, tid);
  86         if ((void *)e->next >= (void *)t->tid_tab &&
  87             (void *)e->next < (void *)&t->atid_tab[t->natids])
  88                 return NULL;
  89
  90         return &e->t3c_tid;
  91 }
  92
  93 /*
  94  * Find the connection corresponding to an active-open TID.
  95  */
  96 static inline struct t3c_tid_entry *lookup_atid(const struct tid_info *t,
  97                                                 unsigned int tid)
  98 {
  99         union active_open_entry *e;
 100
 101         if (tid < t->atid_base || tid >= t->atid_base + t->natids)
 102                 return NULL;
 103
 104         e = atid2entry(t, tid);
 105         if ((void *)e->next >= (void *)t->tid_tab &&
 106             (void *)e->next < (void *)&t->atid_tab[t->natids])
 107                 return NULL;
 108
 109         return &e->t3c_tid;
 110 }
 111
 112 int attach_t3cdev(struct t3cdev *dev);
 113 void detach_t3cdev(struct t3cdev *dev);
 114 #endif