1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2007, 2009 Kip Macy <kmacy@freebsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 * 30 */ 31 32 #ifndef _MVEC_H_ 33 #define _MVEC_H_ 34 #include <machine/bus.h> 35 36 static __inline void 37 busdma_map_mbuf_fast(bus_dma_tag_t tag, bus_dmamap_t map, 38 struct mbuf *m, bus_dma_segment_t *seg) 39 { 40 #if defined(__i386__) || defined(__amd64__) 41 seg->ds_addr = pmap_kextract(mtod(m, vm_offset_t)); 42 seg->ds_len = m->m_len; 43 #else 44 int nsegstmp; 45 46 bus_dmamap_load_mbuf_sg(tag, map, m, seg, &nsegstmp, 0); 47 #endif 48 } 49 50 int busdma_map_sg_collapse(bus_dma_tag_t tag, bus_dmamap_t map, 51 struct mbuf **m, bus_dma_segment_t *segs, int *nsegs); 52 void busdma_map_sg_vec(bus_dma_tag_t tag, bus_dmamap_t map, 53 struct mbuf *m, bus_dma_segment_t *segs, int *nsegs); 54 55 static __inline void 56 m_freem_list(struct mbuf *m) 57 { 58 struct mbuf *n; 59 60 while (m != NULL) { 61 n = m->m_nextpkt; 62 if (n != NULL) 63 prefetch(n); 64 m_freem(m); 65 m = n; 66 } 67 } 68 69 #endif /* _MVEC_H_ */ 70