docs/54752: bus_dma explained in ISA section: should be in own topic

[Bruce Cran]

>Number:         54752
>Category:       docs
>Synopsis:       bus_dma explained in ISA section: should be in own topic
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-doc
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          doc-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jul 22 08:50:20 PDT 2003
>Closed-Date:
>Last-Modified:
>Originator:     Bruce Cran
>Release:        FreeBSD 5.1-CURRENT i386
>Organization:
>Environment:
System: FreeBSD buffy.brucec.backnet 5.1-CURRENT FreeBSD 5.1-CURRENT #1: Tue Jul 15 19:34:38 BST 2003 root at buffy.brucec.backnet:/usr/obj/usr/src/sys/MYKERNEL i386


 	online documentation at http://www.freebsd.org/doc/en/books	
>Description:
	bus_dma is the architecture independant DMA API, which applies both
	to PCI and ISA on x86 architectures.  However, it is explained only
	in the section about ISA resource allocation in the developers handbook.	Developers looking for information about DMA for PCI cards miss this 
	very useful information.  It should possibly be put into its own topic.	
>How-To-Repeat:
	read http://www.freebsd.org/doc/en/books/developers-handbook/isa-driver-busmem.html
>Fix:

	Create a topic documenting bus_dma?   	


>Release-Note:
>Audit-Trail:
>Unformatted: