Messages in this thread Patch in this message | | | Date | Mon, 20 Mar 2006 10:56:41 +0200 | From | Muli Ben-Yehuda <> | Subject | [PATCH 3/3] x86-64: Calgary IOMMU - hook it in |
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This patch hooks Calgary into the build and the x86-64 IOMMU initialization paths.
This is patch -B2 against 2.6.16, with minor Kconfig updates.
diff -Naurp --exclude-from /home/muli/w/dontdiff iommu_detected/arch/x86_64/Kconfig linux/arch/x86_64/Kconfig --- iommu_detected/arch/x86_64/Kconfig 2006-03-20 09:12:23.000000000 +0200 +++ linux/arch/x86_64/Kconfig 2006-03-20 09:30:10.000000000 +0200 @@ -372,6 +372,19 @@ config GART_IOMMU and a software emulation used on other systems. If unsure, say Y. +config CALGARY_IOMMU + bool "IBM x366 server IOMMU" + default y + depends on PCI && MPSC && EXPERIMENTAL + help + Support for hardware IOMMUs in IBM's xSeries x366 and x460 + systems. Needed to run systems with more than 3GB of memory + properly with 32-bit PCI devices that do not support DAC + (Double Address Cycle). The IOMMU can be turned off at + boot time with the iommu=off parameter. Normally the kernel + will make the right choice by iteself. + If unsure, say Y. + # need this always enabled with GART_IOMMU for the VIA workaround config SWIOTLB bool diff -Naurp --exclude-from /home/muli/w/dontdiff iommu_detected/arch/x86_64/kernel/Makefile linux/arch/x86_64/kernel/Makefile --- iommu_detected/arch/x86_64/kernel/Makefile 2006-03-20 09:12:24.000000000 +0200 +++ linux/arch/x86_64/kernel/Makefile 2006-03-20 09:30:11.000000000 +0200 @@ -29,6 +29,7 @@ obj-$(CONFIG_SOFTWARE_SUSPEND) += suspen obj-$(CONFIG_CPU_FREQ) += cpufreq/ obj-$(CONFIG_EARLY_PRINTK) += early_printk.o obj-$(CONFIG_GART_IOMMU) += pci-gart.o aperture.o +obj-$(CONFIG_CALGARY_IOMMU) += pci-calgary.o tce.o obj-$(CONFIG_SWIOTLB) += pci-swiotlb.o obj-$(CONFIG_KPROBES) += kprobes.o obj-$(CONFIG_X86_PM_TIMER) += pmtimer.o diff -Naurp --exclude-from /home/muli/w/dontdiff iommu_detected/arch/x86_64/kernel/pci-dma.c linux/arch/x86_64/kernel/pci-dma.c --- iommu_detected/arch/x86_64/kernel/pci-dma.c 2006-03-20 09:15:17.000000000 +0200 +++ linux/arch/x86_64/kernel/pci-dma.c 2006-03-20 09:30:11.000000000 +0200 @@ -9,6 +9,7 @@ #include <linux/module.h> #include <asm/io.h> #include <asm/proto.h> +#include <asm/calgary.h> int iommu_merge __read_mostly = 0; EXPORT_SYMBOL(iommu_merge); @@ -270,3 +271,21 @@ __init int iommu_setup(char *p) } return 1; } + +static int __init pci_iommu_init(void) +{ + int rc = 0; + +#ifdef CONFIG_GART_IOMMU + rc = gart_iommu_init(); + if (!rc) /* success? */ + return 0; +#endif +#ifdef CONFIG_CALGARY_IOMMU + rc = calgary_iommu_init(); +#endif + return rc; +} + +/* Must execute after PCI subsystem */ +fs_initcall(pci_iommu_init); diff -Naurp --exclude-from /home/muli/w/dontdiff iommu_detected/arch/x86_64/kernel/pci-gart.c linux/arch/x86_64/kernel/pci-gart.c --- iommu_detected/arch/x86_64/kernel/pci-gart.c 2006-03-20 09:15:17.000000000 +0200 +++ linux/arch/x86_64/kernel/pci-gart.c 2006-03-20 09:30:11.000000000 +0200 @@ -605,7 +605,7 @@ static struct dma_mapping_ops gart_dma_o .unmap_sg = gart_unmap_sg, }; -static int __init pci_iommu_init(void) +int __init gart_iommu_init(void) { struct agp_kern_info info; unsigned long aper_size; @@ -725,10 +725,7 @@ static int __init pci_iommu_init(void) return 0; } -/* Must execute after PCI subsystem */ -fs_initcall(pci_iommu_init); - -void gart_parse_options(char *p) +void __init gart_parse_options(char *p) { int arg; diff -Naurp --exclude-from /home/muli/w/dontdiff iommu_detected/arch/x86_64/kernel/setup.c linux/arch/x86_64/kernel/setup.c --- iommu_detected/arch/x86_64/kernel/setup.c 2006-03-20 09:12:25.000000000 +0200 +++ linux/arch/x86_64/kernel/setup.c 2006-03-20 09:30:11.000000000 +0200 @@ -67,6 +67,7 @@ #include <asm/swiotlb.h> #include <asm/sections.h> #include <asm/gart-mapping.h> +#include <asm/calgary.h> /* * Machine setup.. @@ -388,6 +389,12 @@ static __init void parse_cmdline_early ( iommu_setup(from+6); } +#ifdef CONFIG_CALGARY_IOMMU + if (!memcmp(from,"calgary=",8)) { + calgary_parse_options(from+8); + } +#endif + if (!memcmp(from,"oops=panic", 10)) panic_on_oops = 1; @@ -747,6 +754,9 @@ void __init setup_arch(char **cmdline_p) #ifdef CONFIG_GART_IOMMU iommu_hole_init(); #endif +#ifdef CONFIG_CALGARY_IOMMU + detect_calgary(); +#endif #ifdef CONFIG_VT #if defined(CONFIG_VGA_CONSOLE) diff -Naurp --exclude-from /home/muli/w/dontdiff iommu_detected/include/asm-x86_64/pci.h linux/include/asm-x86_64/pci.h --- iommu_detected/include/asm-x86_64/pci.h 2006-03-20 09:13:42.000000000 +0200 +++ linux/include/asm-x86_64/pci.h 2006-03-20 09:30:12.000000000 +0200 @@ -53,7 +53,7 @@ extern int iommu_setup(char *opt); */ #define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys) -#ifdef CONFIG_GART_IOMMU +#if defined(CONFIG_GART_IOMMU) || defined(CONFIG_CALGARY_IOMMU) /* * x86-64 always supports DAC, but sometimes it is useful to force diff -Naurp --exclude-from /home/muli/w/dontdiff iommu_detected/include/asm-x86_64/proto.h linux/include/asm-x86_64/proto.h --- iommu_detected/include/asm-x86_64/proto.h 2006-03-20 09:13:42.000000000 +0200 +++ linux/include/asm-x86_64/proto.h 2006-03-20 09:30:12.000000000 +0200 @@ -104,7 +104,9 @@ extern int unsynchronized_tsc(void); extern void select_idle_routine(const struct cpuinfo_x86 *c); extern void gart_parse_options(char *); -extern void __init no_iommu_init(void); +extern int gart_iommu_init(void); +extern void no_iommu_init(void); +extern void detect_calgary(void); extern unsigned long table_start, table_end;
-- Muli Ben-Yehuda http://www.mulix.org | http://mulix.livejournal.com/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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