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PCI/x86: don't assume prefetchable ranges are 64bit

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We should not assign 64bit ranges to PCI devices that only take 32bit
prefetchable addresses.

Try to set IORESOURCE_MEM_64 in 64bit resource of pci_device/pci_bridge
and make the bus resource only have that bit set when all devices under
it support 64bit prefetchable memory.  Use that flag to allocate
resources from that range.

Reported-by: Yannick <yannick.roehlly@free.fr>
Reviewed-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Yinghai Lu 2009-04-23 20:48:32 -07:00 • committed by Jesse Barnes
parent 67b5db6502
commit 1f82de10d6
6 changed files with 62 additions and 13 deletions
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4
include/linux/pci.h
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@ -1097,6 +1097,10 @@ static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
#include <asm/pci.h>
#ifndef PCIBIOS_MAX_MEM_32
#define PCIBIOS_MAX_MEM_32 (-1)
#endif
/* these helpers provide future and backwards compatibility
* for accessing popular PCI BAR info */
#define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)