mvec.h revision 331722 
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: stable/11/sys/dev/cxgb/sys/mvec.h 331722 2018-03-29 02:50:57Z eadler $
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