1/*- 2 * Copyright (c) 2007, 2009 Kip Macy <kmacy@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 * 28 */ 29 30#ifndef _MVEC_H_ 31#define _MVEC_H_ 32#include <machine/bus.h> 33 34static __inline void 35busdma_map_mbuf_fast(bus_dma_tag_t tag, bus_dmamap_t map, 36 struct mbuf *m, bus_dma_segment_t *seg) 37{ 38#if defined(__i386__) || defined(__amd64__) 39 seg->ds_addr = pmap_kextract(mtod(m, vm_offset_t)); 40 seg->ds_len = m->m_len; 41#else 42 int nsegstmp; 43 44 bus_dmamap_load_mbuf_sg(tag, map, m, seg, &nsegstmp, 0); 45#endif 46} 47 48int busdma_map_sg_collapse(bus_dma_tag_t tag, bus_dmamap_t map, 49 struct mbuf **m, bus_dma_segment_t *segs, int *nsegs); 50void busdma_map_sg_vec(bus_dma_tag_t tag, bus_dmamap_t map, 51 struct mbuf *m, bus_dma_segment_t *segs, int *nsegs); 52 53static __inline void 54m_freem_list(struct mbuf *m) 55{ 56 struct mbuf *n; 57 58 while (m != NULL) { 59 n = m->m_nextpkt; 60 if (n != NULL) 61 prefetch(n); 62 m_freem(m); 63 m = n; 64 } 65} 66 67#endif /* _MVEC_H_ */ 68