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authorDavid S. Miller <davem@davemloft.net>2005-08-08 13:19:08 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2005-09-08 14:57:25 -0700
commit085ae41f66657a9655ce832b0a61832a06f0e1dc (patch)
tree215690b947b14fa18cbb2810db1a4082ad607e7a /include/asm-ia64
parent064b53dbcc977dbf2753a67c2b8fc1c061d74f21 (diff)
downloadop-kernel-dev-085ae41f66657a9655ce832b0a61832a06f0e1dc.zip
op-kernel-dev-085ae41f66657a9655ce832b0a61832a06f0e1dc.tar.gz
[PATCH] Make sparc64 use setup-res.c
There were three changes necessary in order to allow sparc64 to use setup-res.c: 1) Sparc64 roots the PCI I/O and MEM address space using parent resources contained in the PCI controller structure. I'm actually surprised no other platforms do this, especially ones like Alpha and PPC{,64}. These resources get linked into the iomem/ioport tree when PCI controllers are probed. So the hierarchy looks like this: iomem --| PCI controller 1 MEM space --| device 1 device 2 etc. PCI controller 2 MEM space --| ... ioport --| PCI controller 1 IO space --| ... PCI controller 2 IO space --| ... You get the idea. The drivers/pci/setup-res.c code allocates using plain iomem_space and ioport_space as the root, so that wouldn't work with the above setup. So I added a pcibios_select_root() that is used to handle this. It uses the PCI controller struct's io_space and mem_space on sparc64, and io{port,mem}_resource on every other platform to keep current behavior. 2) quirk_io_region() is buggy. It takes in raw BUS view addresses and tries to use them as a PCI resource. pci_claim_resource() expects the resource to be fully formed when it gets called. The sparc64 implementation would do the translation but that's absolutely wrong, because if the same resource gets released then re-claimed we'll adjust things twice. So I fixed up quirk_io_region() to do the proper pcibios_bus_to_resource() conversion before passing it on to pci_claim_resource(). 3) I was mistakedly __init'ing the function methods the PCI controller drivers provide on sparc64 to implement some parts of these routines. This was, of course, easy to fix. So we end up with the following, and that nasty SPARC64 makefile ifdef in drivers/pci/Makefile is finally zapped. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/asm-ia64')
-rw-r--r--include/asm-ia64/pci.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/asm-ia64/pci.h b/include/asm-ia64/pci.h
index dba9f22..ef616fd 100644
--- a/include/asm-ia64/pci.h
+++ b/include/asm-ia64/pci.h
@@ -156,6 +156,19 @@ extern void pcibios_resource_to_bus(struct pci_dev *dev,
extern void pcibios_bus_to_resource(struct pci_dev *dev,
struct resource *res, struct pci_bus_region *region);
+static inline struct resource *
+pcibios_select_root(struct pci_dev *pdev, struct resource *res)
+{
+ struct resource *root = NULL;
+
+ if (res->flags & IORESOURCE_IO)
+ root = &ioport_resource;
+ if (res->flags & IORESOURCE_MEM)
+ root = &iomem_resource;
+
+ return root;
+}
+
#define pcibios_scan_all_fns(a, b) 0
#endif /* _ASM_IA64_PCI_H */
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