1 1.1 jmcneill /* $NetBSD: dtv_scatter.h,v 1.1 2011/07/09 14:46:56 jmcneill Exp $ */ 2 1.1 jmcneill 3 1.1 jmcneill /*- 4 1.1 jmcneill * Copyright (c) 2011 Jared D. McNeill <jmcneill (at) invisible.ca> 5 1.1 jmcneill * All rights reserved. 6 1.1 jmcneill * 7 1.1 jmcneill * Redistribution and use in source and binary forms, with or without 8 1.1 jmcneill * modification, are permitted provided that the following conditions 9 1.1 jmcneill * are met: 10 1.1 jmcneill * 1. Redistributions of source code must retain the above copyright 11 1.1 jmcneill * notice, this list of conditions and the following disclaimer. 12 1.1 jmcneill * 2. Redistributions in binary form must reproduce the above copyright 13 1.1 jmcneill * notice, this list of conditions and the following disclaimer in the 14 1.1 jmcneill * documentation and/or other materials provided with the distribution. 15 1.1 jmcneill * 3. All advertising materials mentioning features or use of this software 16 1.1 jmcneill * must display the following acknowledgement: 17 1.1 jmcneill * This product includes software developed by Jared D. McNeill. 18 1.1 jmcneill * 4. Neither the name of The NetBSD Foundation nor the names of its 19 1.1 jmcneill * contributors may be used to endorse or promote products derived 20 1.1 jmcneill * from this software without specific prior written permission. 21 1.1 jmcneill * 22 1.1 jmcneill * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 1.1 jmcneill * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 1.1 jmcneill * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 1.1 jmcneill * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26 1.1 jmcneill * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 1.1 jmcneill * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 1.1 jmcneill * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 1.1 jmcneill * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 1.1 jmcneill * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 1.1 jmcneill * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 1.1 jmcneill * POSSIBILITY OF SUCH DAMAGE. 33 1.1 jmcneill */ 34 1.1 jmcneill 35 1.1 jmcneill #ifndef _DEV_DTV_DTV_SCATTER_H 36 1.1 jmcneill #define _DEV_DTV_DTV_SCATTER_H 37 1.1 jmcneill 38 1.1 jmcneill #include <sys/pool.h> 39 1.1 jmcneill 40 1.1 jmcneill struct dtv_scatter_buf { 41 1.1 jmcneill pool_cache_t sb_pool; 42 1.1 jmcneill size_t sb_size; /* size in bytes */ 43 1.1 jmcneill size_t sb_npages; /* number of pages */ 44 1.1 jmcneill uint8_t **sb_page_ary; /* array of page pointers */ 45 1.1 jmcneill }; 46 1.1 jmcneill 47 1.1 jmcneill struct dtv_scatter_io { 48 1.1 jmcneill struct dtv_scatter_buf *sio_buf; 49 1.1 jmcneill off_t sio_offset; 50 1.1 jmcneill size_t sio_resid; 51 1.1 jmcneill }; 52 1.1 jmcneill 53 1.1 jmcneill void dtv_scatter_buf_init(struct dtv_scatter_buf *); 54 1.1 jmcneill void dtv_scatter_buf_destroy(struct dtv_scatter_buf *); 55 1.1 jmcneill int dtv_scatter_buf_set_size(struct dtv_scatter_buf *, size_t); 56 1.1 jmcneill paddr_t dtv_scatter_buf_map(struct dtv_scatter_buf *, off_t); 57 1.1 jmcneill 58 1.1 jmcneill bool dtv_scatter_io_init(struct dtv_scatter_buf *, off_t, size_t, 59 1.1 jmcneill struct dtv_scatter_io *); 60 1.1 jmcneill bool dtv_scatter_io_next(struct dtv_scatter_io *, void **, size_t *); 61 1.1 jmcneill void dtv_scatter_io_undo(struct dtv_scatter_io *, size_t); 62 1.1 jmcneill void dtv_scatter_io_copyin(struct dtv_scatter_io *, const void *); 63 1.1 jmcneill /* void dtv_scatter_io_copyout(struct dtv_scatter_io *, void *); */ 64 1.1 jmcneill int dtv_scatter_io_uiomove(struct dtv_scatter_io *, struct uio *); 65 1.1 jmcneill 66 1.1 jmcneill #endif /* !_DEV_DTV_DTV_SCATTER_H */ 67
Indexes created Sat Sep 27 22:09:54 GMT 2025