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 34 #define M_DDP 0x200000 /* direct data placement mbuf */ 35 #define EXT_PHYS 10 /* physical/bus address */ 36 37 #define m_cur_offset m_ext.ext_size /* override to provide ddp offset */ 38 #define m_seq m_pkthdr.csum_data /* stored sequence */ 39 #define m_ddp_gl m_ext.ext_buf /* ddp list */ 40 #define m_ddp_flags m_pkthdr.csum_flags /* ddp flags */ 41 #define m_ulp_mode m_pkthdr.tso_segsz /* upper level protocol */ 42 43 static __inline void 44 busdma_map_mbuf_fast(bus_dma_tag_t tag, bus_dmamap_t map, 45 struct mbuf *m, bus_dma_segment_t *seg) 46 { 47 #if defined(__i386__) || defined(__amd64__) 48 seg->ds_addr = pmap_kextract(mtod(m, vm_offset_t)); 49 seg->ds_len = m->m_len; 50 #else 51 int nsegstmp; 52 53 bus_dmamap_load_mbuf_sg(tag, map, m, seg, &nsegstmp, 0); 54 #endif 55 } 56 57 int busdma_map_sg_collapse(bus_dma_tag_t tag, bus_dmamap_t map, 58 struct mbuf **m, bus_dma_segment_t *segs, int *nsegs); 59 void busdma_map_sg_vec(bus_dma_tag_t tag, bus_dmamap_t map, 60 struct mbuf *m, bus_dma_segment_t *segs, int *nsegs); 61 static __inline int 62 busdma_map_sgl(bus_dma_segment_t *vsegs, bus_dma_segment_t *segs, int count) 63 { 64 while (count--) { 65 segs->ds_addr = pmap_kextract((vm_offset_t)vsegs->ds_addr); 66 segs->ds_len = vsegs->ds_len; 67 segs++; 68 vsegs++; 69 } 70 return (0); 71 } 72 73 static __inline void 74 m_freem_list(struct mbuf *m) 75 { 76 struct mbuf *n; 77 78 while (m != NULL) { 79 n = m->m_nextpkt; 80 if (n != NULL) 81 prefetch(n); 82 m_freem(m); 83 m = n; 84 } 85 } 86 87 88 #endif /* _MVEC_H_ */ 89