67 lines
2.9 KiB
C
67 lines
2.9 KiB
C
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/* $NetBSD: dtv_scatter.h,v 1.1 2011/07/09 14:46:56 jmcneill Exp $ */
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/*-
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* Copyright (c) 2011 Jared D. McNeill <jmcneill@invisible.ca>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Jared D. McNeill.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _DEV_DTV_DTV_SCATTER_H
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#define _DEV_DTV_DTV_SCATTER_H
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#include <sys/pool.h>
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struct dtv_scatter_buf {
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pool_cache_t sb_pool;
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size_t sb_size; /* size in bytes */
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size_t sb_npages; /* number of pages */
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uint8_t **sb_page_ary; /* array of page pointers */
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};
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struct dtv_scatter_io {
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struct dtv_scatter_buf *sio_buf;
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off_t sio_offset;
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size_t sio_resid;
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};
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void dtv_scatter_buf_init(struct dtv_scatter_buf *);
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void dtv_scatter_buf_destroy(struct dtv_scatter_buf *);
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int dtv_scatter_buf_set_size(struct dtv_scatter_buf *, size_t);
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paddr_t dtv_scatter_buf_map(struct dtv_scatter_buf *, off_t);
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bool dtv_scatter_io_init(struct dtv_scatter_buf *, off_t, size_t,
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struct dtv_scatter_io *);
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bool dtv_scatter_io_next(struct dtv_scatter_io *, void **, size_t *);
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void dtv_scatter_io_undo(struct dtv_scatter_io *, size_t);
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void dtv_scatter_io_copyin(struct dtv_scatter_io *, const void *);
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/* void dtv_scatter_io_copyout(struct dtv_scatter_io *, void *); */
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int dtv_scatter_io_uiomove(struct dtv_scatter_io *, struct uio *);
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#endif /* !_DEV_DTV_DTV_SCATTER_H */
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