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shmifvar.h revision 1.3 
      1 /*	$NetBSD: shmifvar.h,v 1.3 2010/08/12 21:41:47 pooka Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2009 Antti Kantee.  All Rights Reserved.
      5  *
      6  * Development of this software was supported by The Nokia Foundation.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     18  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     23  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27  * SUCH DAMAGE.
     28  */
     29 
     30 #ifndef _RUMP_NET_SHMIFVAR_H_
     31 #define _RUMP_NET_SHMIFVAR_H_
     32 
     33 #define SHMIF_MAGIC 0xca11d054
     34 #define SHMIF_VERSION 1
     35 
     36 struct shmif_mem {
     37 	uint32_t shm_magic;
     38 	uint32_t shm_version;
     39 
     40 	uint64_t shm_gen;
     41 
     42 	uint32_t shm_first;
     43 	uint32_t shm_last;
     44 
     45 	uint32_t shm_lock;
     46 	uint32_t shm_spare[1];
     47 
     48 	uint8_t shm_data[0];
     49 };
     50 
     51 #define IFMEM_DATA	(offsetof(struct shmif_mem, shm_data))
     52 #define IFMEM_WAKEUP	(offsetof(struct shmif_mem, shm_version))
     53 #define PKTLEN_SIZE 	(sizeof(uint32_t))
     54 
     55 #define BUSMEM_SIZE (1024*1024)
     56 #define BUSMEM_DATASIZE (BUSMEM_SIZE - sizeof(struct shmif_mem))
     57 
     58 #if 0
     59 #ifdef _KERNEL
     60 #define DPRINTF(x) rumpuser_dprintf x
     61 #else
     62 #define DPRINTF(x) printf x
     63 #endif
     64 #else
     65 #define DPRINTF(x)
     66 #endif
     67 
     68 void		shmif_lockbus(struct shmif_mem *);
     69 void		shmif_unlockbus(struct shmif_mem *);
     70 uint32_t	shmif_advance(uint32_t, uint32_t);
     71 uint32_t	shmif_busread(struct shmif_mem *,
     72 			      void *, uint32_t, size_t, bool *);
     73 void		shmif_advancefirst(struct shmif_mem *, uint32_t, size_t);
     74 uint32_t	shmif_buswrite(struct shmif_mem *, uint32_t,
     75 			       void *, size_t, bool *);
     76 uint32_t	shmif_nextpktoff(struct shmif_mem *, uint32_t);
     77 
     78 #endif
     79