| bus_dma.9 (139592) | bus_dma.9 (140317) |
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| 1.\" Copyright (c) 2002, 2003 Hiten M. Pandya. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions, and the following disclaimer, --- 43 unchanged lines hidden (view full) --- 52.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 53.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 54.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 55.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 56.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 57.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 58.\" POSSIBILITY OF SUCH DAMAGE. 59.\" | 1.\" Copyright (c) 2002, 2003 Hiten M. Pandya. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions, and the following disclaimer, --- 43 unchanged lines hidden (view full) --- 52.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 53.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 54.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 55.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 56.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 57.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 58.\" POSSIBILITY OF SUCH DAMAGE. 59.\" |
| 60.\" $FreeBSD: head/share/man/man9/bus_dma.9 139592 2005-01-02 18:20:29Z krion $ | 60.\" $FreeBSD: head/share/man/man9/bus_dma.9 140317 2005-01-15 20:50:52Z scottl $ |
| 61.\" $NetBSD: bus_dma.9,v 1.25 2002/10/14 13:43:16 wiz Exp $ 62.\" 63.Dd May 28, 2003 64.Dt BUS_DMA 9 65.Os 66.Sh NAME 67.Nm bus_dma , 68.Nm bus_dma_tag_create , 69.Nm bus_dma_tag_destroy , 70.Nm bus_dmamap_create , 71.Nm bus_dmamap_destroy , 72.Nm bus_dmamap_load , 73.Nm bus_dmamap_load_mbuf , | 61.\" $NetBSD: bus_dma.9,v 1.25 2002/10/14 13:43:16 wiz Exp $ 62.\" 63.Dd May 28, 2003 64.Dt BUS_DMA 9 65.Os 66.Sh NAME 67.Nm bus_dma , 68.Nm bus_dma_tag_create , 69.Nm bus_dma_tag_destroy , 70.Nm bus_dmamap_create , 71.Nm bus_dmamap_destroy , 72.Nm bus_dmamap_load , 73.Nm bus_dmamap_load_mbuf , |
| 74.Nm bus_dmamap_load_mbuf_sg , |
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| 74.Nm bus_dmamap_load_uio , 75.Nm bus_dmamap_unload , 76.Nm bus_dmamap_sync , 77.Nm bus_dmamem_alloc , 78.Nm bus_dmamem_free 79.Nd Bus and Machine Independent DMA Mapping Interface 80.Sh SYNOPSIS 81.In machine/bus.h --- 13 unchanged lines hidden (view full) --- 95.Fn bus_dmamap_load "bus_dma_tag_t dmat" "bus_dmamap_t map" "void *buf" \ 96"bus_size_t buflen" "bus_dmamap_callback_t *callback" "void *callback_arg" \ 97"int flags" 98.Ft int 99.Fn bus_dmamap_load_mbuf "bus_dma_tag_t dmat" "bus_dmamap_t map" \ 100"struct mbuf *mbuf" "bus_dmamap_callback2_t *callback" "void *callback_arg" \ 101"int flags" 102.Ft int | 75.Nm bus_dmamap_load_uio , 76.Nm bus_dmamap_unload , 77.Nm bus_dmamap_sync , 78.Nm bus_dmamem_alloc , 79.Nm bus_dmamem_free 80.Nd Bus and Machine Independent DMA Mapping Interface 81.Sh SYNOPSIS 82.In machine/bus.h --- 13 unchanged lines hidden (view full) --- 96.Fn bus_dmamap_load "bus_dma_tag_t dmat" "bus_dmamap_t map" "void *buf" \ 97"bus_size_t buflen" "bus_dmamap_callback_t *callback" "void *callback_arg" \ 98"int flags" 99.Ft int 100.Fn bus_dmamap_load_mbuf "bus_dma_tag_t dmat" "bus_dmamap_t map" \ 101"struct mbuf *mbuf" "bus_dmamap_callback2_t *callback" "void *callback_arg" \ 102"int flags" 103.Ft int |
| 104.Fn bus_dmamap_load_mbuf_sg "bus_dma_tag_t dmat" "bus_dmamap_t map" \ 105"struct mbuf *mbuf" "bus_dma_segment_t *segs" "int *nsegs" "int flags" 106.Ft int |
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| 103.Fn bus_dmamap_load_uio "bus_dma_tag_t dmat" "bus_dmamap_t map" \ 104"struct uio *uio" "bus_dmamap_callback2_t *callback" "void *callback_arg" \ 105"int flags" 106.Ft void 107.Fn bus_dmamap_unload "bus_dma_tag_t dmat" "bus_dmamap_t map" 108.Ft void 109.Fn bus_dmamap_sync "bus_dma_tag_t dmat" "bus_dmamap_t map" \ 110"op" --- 440 unchanged lines hidden (view full) --- 551contains the mbuf chain's packet header length. 552.Pp 553Mbuf chains are assumed to be in kernel virtual address space. 554.Pp 555Returns 556.Er EINVAL 557if the size of the mbuf chain exceeds the maximum limit of the 558DMA tag. | 107.Fn bus_dmamap_load_uio "bus_dma_tag_t dmat" "bus_dmamap_t map" \ 108"struct uio *uio" "bus_dmamap_callback2_t *callback" "void *callback_arg" \ 109"int flags" 110.Ft void 111.Fn bus_dmamap_unload "bus_dma_tag_t dmat" "bus_dmamap_t map" 112.Ft void 113.Fn bus_dmamap_sync "bus_dma_tag_t dmat" "bus_dmamap_t map" \ 114"op" --- 440 unchanged lines hidden (view full) --- 555contains the mbuf chain's packet header length. 556.Pp 557Mbuf chains are assumed to be in kernel virtual address space. 558.Pp 559Returns 560.Er EINVAL 561if the size of the mbuf chain exceeds the maximum limit of the 562DMA tag. |
| 563.It Fn bus_dmamap_load_mbuf_sg "dmat" "map" "mbuf" "segs" "nsegs" "flags" 564This is just like 565.Fn bus_dmamap_load_mbuf 566except that it returns immediately without calling a callback function. It is 567provided for efficiency. 568The scatter/gather segment array 569.Va segs 570is provided by the caller and filled in directly by the function. 571The 572.Va nsegs 573argument is returned with the number of segments filled in. 574Returns the same errors as 575.Fn bus_dmamap_load_mbuf . |
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| 559.It Fn bus_dmamap_load_uio "dmat" "map" "uio" "callback2" "callback_arg" "flags" 560This is a variation of 561.Fn bus_dmamap_load 562which maps buffers pointed to by 563.Fa uio 564for DMA transfers. 565A 566.Vt bus_size_t --- 233 unchanged lines hidden --- | 576.It Fn bus_dmamap_load_uio "dmat" "map" "uio" "callback2" "callback_arg" "flags" 577This is a variation of 578.Fn bus_dmamap_load 579which maps buffers pointed to by 580.Fa uio 581for DMA transfers. 582A 583.Vt bus_size_t --- 233 unchanged lines hidden --- |