55 lines
2.1 KiB
C
55 lines
2.1 KiB
C
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/*
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*
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Copyright (c) Eicon Networks, 2002.
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*
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This source file is supplied for the use with
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Eicon Networks range of DIVA Server Adapters.
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*
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Eicon File Revision : 2.1
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*
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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*
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY OF ANY KIND WHATSOEVER INCLUDING ANY
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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*
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#ifndef __DIVA_IDI_DFIFO_INC__
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#define __DIVA_IDI_DFIFO_INC__
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#define DIVA_DFIFO_CACHE_SZ 64 /* Used to isolate pipe from
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rest of the world
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should be divisible by 4
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*/
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#define DIVA_DFIFO_RAW_SZ (2512 * 8)
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#define DIVA_DFIFO_DATA_SZ 68
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#define DIVA_DFIFO_HDR_SZ 4
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#define DIVA_DFIFO_SEGMENT_SZ (DIVA_DFIFO_DATA_SZ + DIVA_DFIFO_HDR_SZ)
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#define DIVA_DFIFO_SEGMENTS ((DIVA_DFIFO_RAW_SZ) / (DIVA_DFIFO_SEGMENT_SZ) + 1)
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#define DIVA_DFIFO_MEM_SZ ( \
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(DIVA_DFIFO_SEGMENT_SZ) * (DIVA_DFIFO_SEGMENTS) + \
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(DIVA_DFIFO_CACHE_SZ) * 2 \
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)
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#define DIVA_DFIFO_STEP DIVA_DFIFO_SEGMENT_SZ
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/* -------------------------------------------------------------------------
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Block header layout is:
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byte[0] -> flags
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byte[1] -> length of data in block
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byte[2] -> reserved
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byte[4] -> reserved
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------------------------------------------------------------------------- */
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#define DIVA_DFIFO_WRAP 0x80 /* This is the last block in fifo */
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#define DIVA_DFIFO_READY 0x40 /* This block is ready for processing */
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#define DIVA_DFIFO_LAST 0x20 /* This block is last in message */
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#define DIVA_DFIFO_AUTO 0x10 /* Don't look for 'ready', don't ack */
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int diva_dfifo_create(void *start, int length);
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#endif
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