Skip to main content

Browse the archive

https://github.com/torvalds/linux
27 March 2024, 02:37:15 UTC
Revision 90b54929b626c80056262d9d99b3f48522e404d0 authored by Ivan Kokshaysky on 07 June 2005, 00:07:02 UTC, committed by Greg Kroah-Hartman on 01 July 2005, 20:35:50 UTC 
[PATCH] PCI: handle subtractive decode pci-pci bridge better
 
With the number of PCI bus resources increased to 8, we can
handle the subtractive decode PCI-PCI bridge like a normal
bridge, taking into account standard PCI-PCI bridge windows
(resources 0-2). This helps to avoid problems with peer-to-peer DMA
behind such bridges, poor performance for MMIO ranges outside bridge
windows and prefetchable vs. non-prefetchable memory issues.

To reflect the fact that such bridges do forward all addresses to
the secondary bus (transparency), remaining bus resources 3-7 are
linked to resources 0-4 of the primary bus. These resources will be
used as fallback by resource management code if allocation from
standard bridge windows fails for some reason.

Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Acked-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
1 parent a03fa95
History
Tip revision: 90b54929b626c80056262d9d99b3f48522e404d0 authored by Ivan Kokshaysky on 07 June 2005, 00:07:02 UTC
[PATCH] PCI: handle subtractive decode pci-pci bridge better
Tip revision: 90b5492
File Mode Size
Documentation
arch
crypto
drivers
fs
include
init
ipc
kernel
lib
mm
net
scripts
security
sound
usr
COPYING -rw-r--r-- 18.3 KB
CREDITS -rw-r--r-- 87.3 KB
MAINTAINERS -rw-r--r-- 56.6 KB
Makefile -rw-r--r-- 43.2 KB
README -rw-r--r-- 13.6 KB
REPORTING-BUGS -rw-r--r-- 2.9 KB

README

back to top