mvec.h

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    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: releng/8.4/sys/dev/cxgb/sys/mvec.h 209061 2010-06-11 19:17:36Z ken $
   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_ */

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FreeBSD/Linux Kernel Cross Reference sys/dev/cxgb/sys/mvec.h

FreeBSD/Linux Kernel Cross Reference
sys/dev/cxgb/sys/mvec.h