From 7e302869e0c5261aba779e059cddcd2fbf7aedbe Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Wed, 6 Aug 2008 09:10:01 +1000 Subject: powerpc: Split-out common MSI bitmap logic into msi_bitmap.c There are now two almost identical implementations of an MSI bitmap allocator, one in mpic_msi.c and the other in fsl_msi.c. Merge them together and put the result in msi_bitmap.c. Some of the MPIC bits will remain to provide a nicer interface for the MPIC users. In the process we fix two buglets. The first is that the allocation routines, now msi_bitmap_alloc_hwirqs(), returned an unsigned result, even though they use -1 to indicate allocation failure. Although all the callers were checking correctly, it is much better for the routine to just return an int. At least until someone wants > ~2 billion MSIs. The second buglet is that the device tree reservation logic only allowed power-of-two reservations. AFAICT that didn't effect any existing code but it's nicer if we can reserve arbitrary irqs from MSI use. We also add some selftests, which exposed the two buglets and now test for them, as well as some basic sanity tests. The tests are only built when CONFIG_DEBUG_KERNEL=y. Signed-off-by: Michael Ellerman Signed-off-by: Paul Mackerras --- arch/powerpc/sysdev/Kconfig | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'arch/powerpc/sysdev/Kconfig') diff --git a/arch/powerpc/sysdev/Kconfig b/arch/powerpc/sysdev/Kconfig index 72fb35b9ebc..396582835cb 100644 --- a/arch/powerpc/sysdev/Kconfig +++ b/arch/powerpc/sysdev/Kconfig @@ -6,3 +6,9 @@ config PPC4xx_PCI_EXPRESS bool depends on PCI && 4xx default n + +config PPC_MSI_BITMAP + bool + depends on PCI_MSI + default y if MPIC + default y if FSL_PCI -- cgit v1.2.3-70-g09d2