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PCI domain support for 2.4

PATCH Bjorn Helgaas 1 participant 1 message Jul 30, 2003

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Bjorn Helgaas

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Quoted 9 lines · Matthew Wilcox

2.4 can support PCI domains with non-overlapping bus numbers. While this isn't terribly useful, it may help some machine designs. This is the minimum patch to support this for 2.4 -- a more invasive patch would replace PCI_SEGMENT with pci_controller_num throughout the ia64 code.

=== include/asm-ia64/pci.h 1.12 vs edited ==> --- 1.12/include/asm-ia64/pci.h Thu Mar 6 09:43:37 2003
+++ edited/include/asm-ia64/pci.h Fri Jun 20 09:41:13 2003

Review line 89

Quoted 10 lines
(quoted diff) +2 -2
@@ -82,8 +82,8 @@
 #define pci_dac_dma_to_offset(dev,dma_addr)	((dma_addr) & ~PAGE_MASK)
 #define pci_dac_dma_sync_single(dev,dma_addr,len,dir)	do { /* nothing */ } while (0)
 
-/* Return the index of the PCI controller for device PDEV. */
-#define pci_controller_num(PDEV)	(0)
+/* Return the PCI domain number */
+#define pci_controller_num(pdev)	(PCI_SEGMENT(pdev))
 
 #define sg_dma_address(sg)	((sg)->dma_address)
 #define sg_dma_len(sg)		((sg)->dma_length)

I applied this for 2.4. Thanks!

Bjorn