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authorYinghai Lu <yinghai@kernel.org>2009-04-23 20:48:32 -0700
committerJesse Barnes <jbarnes@virtuousgeek.org>2009-06-11 12:04:06 -0700
commit1f82de10d6b1d845155363c895c552e61b36b51a (patch)
tree3e93b9d1c97ae48509133fbbec9c81b4823816a5 /include/linux
parent67b5db6502ddd27d65dea43bf036abbd82d0dfc9 (diff)
PCI/x86: don't assume prefetchable ranges are 64bit
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>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/ioport.h2
-rw-r--r--include/linux/pci.h4
2 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 32e4b2f72294..786e7b8cece9 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -49,6 +49,8 @@ struct resource_list {
#define IORESOURCE_SIZEALIGN 0x00020000 /* size indicates alignment */
#define IORESOURCE_STARTALIGN 0x00040000 /* start field is alignment */
+#define IORESOURCE_MEM_64 0x00100000
+
#define IORESOURCE_EXCLUSIVE 0x08000000 /* Userland may not map this resource */
#define IORESOURCE_DISABLED 0x10000000
#define IORESOURCE_UNSET 0x20000000
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 72698d89e767..6dfa47d25ba4 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -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)