usr/src/uts/common/sys/suntpi.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 1990-1998 by Sun Microsystems, Inc.
  24  * All rights reserved.
  25  */
  26
  27 #ifndef _SYS_SUNTPI_H
  28 #define _SYS_SUNTPI_H
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #include <sys/types.h>
  33 #include <sys/ksynch.h>
  34 #include <sys/stream.h>
  35
  36 #ifdef  __cplusplus
  37 extern "C" {
  38 #endif
  39
  40 #ifdef  _KERNEL
  41
  42 /*
  43  * Persistent information about the capabilities of transport providers.
  44  * This structure is for the internal use of sockfs and timod.  Because
  45  * bitfield operations are not atomic, the lock must be used to avoid
  46  * inconsistencies.
  47  */
  48 typedef struct tpi_provinfo {
  49         struct tpi_provinfo     *tpi_next;
  50         void                    *tpi_key;
  51         size_t                  tpi_keylen;
  52         kmutex_t                tpi_lock;
  53         uint32_t                tpi_capability : 2,
  54                                 tpi_myname : 2,
  55                                 tpi_peername : 2,
  56                                 _tpi_unused : 26;
  57 } tpi_provinfo_t;
  58
  59 /*
  60  * Possible values for the above 2-bitfields.  A capability is either
  61  * supported, unsupported or unknown.
  62  */
  63 #define PI_DONTKNOW     0
  64 #define PI_NO           1
  65 #define PI_YES          2
  66
  67 extern void             tpi_init(void);
  68 extern tpi_provinfo_t   *tpi_findprov(queue_t *);
  69
  70 #define PI_PROVLOCK(tp)         mutex_enter(&(tp)->tpi_lock)
  71 #define PI_PROVUNLOCK(tp)       mutex_exit(&(tp)->tpi_lock)
  72
  73 extern mblk_t   *tpi_ack_alloc(mblk_t *, size_t, uchar_t, t_scalar_t);
  74
  75 #endif  /* _KERNEL */
  76
  77 #ifdef  __cplusplus
  78 }
  79 #endif
  80
  81 #endif  /* _SYS_SUNTPI_H */