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Document isa_drq_alloc/free.

This commit is contained in:
fvdl 2003-05-10 00:02:22 +00:00
parent d88cf589cb
commit b1d933d3cf
1 changed files with 20 additions and 1 deletions
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21
share/man/man9/isa.9
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@ -1,4 +1,4 @@
.\" $NetBSD: isa.9,v 1.10 2003/04/16 13:35:29 wiz Exp $
.\" $NetBSD: isa.9,v 1.11 2003/05/10 00:02:22 fvdl Exp $
.\"
.\" Copyright (c) 2001 The NetBSD Foundation, Inc.
.\" All rights reserved.
@ -56,6 +56,8 @@
.Nm isa_dmacount ,
.Nm isa_dmadone ,
.Nm isa_dmamaxsize ,
.Nm isa_drq_alloc ,
.Nm isa_drq_free ,
.Nm isa_drq_isfree ,
.Nm isa_dmacascade ,
.Nm isa_mappage
@ -110,6 +112,10 @@
.Ft bus_size_t
.Fn isa_dmamaxsize "isa_chipset_tag_t ic" "int chan"
.Ft int
.Fn isa_drq_alloc "isa_chipset_tag_t ic" "int chan"
.Ft int
.Fn isa_drq_free "isa_chipset_tag_t ic" "int chan"
.Ft int
.Fn isa_drq_isfree "isa_chipset_tag_t ic" "int chan"
.Ft int
.Fn isa_dmacascade "isa_chipset_tag_t ic" "int chan"
@ -205,6 +211,19 @@ Dis-establish the interrupt handler with handle
.Fa ih .
The handle was returned from
.Fn isa_intr_establish .
.It Fn isa_drq_alloc "ic" "chan"
Reserves the DMA channel
.Fa chan
for future use.
Normally, this call precedes an
.Fn isa_dmamap_create
call. It is an error to start DMA on a channel that has not been reserved
with
.Fn isa_drq_alloc .
.It Fn isa_drq_free "ic" "chan"
Marks the DMA channel
.Fa chan
as available again.
.It Fn isa_dmamap_create "ic" "chan" "size" "flags"
Creates a DMA map for channel
.Fa chan .