Hi all, I am sending these patches at this early stage to get some feedbacks about the basic idea of this IOMMU implementation. Some of OMAP series have the peripheral devices with their own Memory Management Unit(IOMMU), which is composed of its own TLB and optional H/W pagetable (TWL). These MMUs doesn't depend on MPU(ARM) MMU at all, but their algorithms are quite similar and they share the same physical address space. This patch provides with common in-kernel iommu APIs such OMAP peripheral devices(Camera ISP, IVA1, IVA2, DSP and the equivalent ones in the latest OMAP successors) to handle peripheral device IOMMUs in the same manner. The following patches are composed of the following modules: [PATCH 1/4] omap iommu: tlb and pagetable primitives [PATCH 2/4] omap iommu: omap2 architecture specific functions [PATCH 3/4] omap iommu: sysfs for userland interface [PATCH 4/4] omap iommu: simple virtual address space management "[PATCH 1/4]" has been updated with Russell's comments on: http://marc.info/?l=linux-omap&m=122087083712670&w=2 Generalizing this omap iommu code independently from each device drivers, "Camera(ISP)", "TI bridge(IVA/DSP)", "dspgateway(DSP)" and the future OMAP equivalent device would be more robust and reduce the maintenance cost since keeping this critical code at one place can avoid some risks, like wrong MMU settings, which may cause critical damages on the system. arch/arm/include/asm/io.h | 2 + arch/arm/mach-omap2/iommu2.c | 373 ++++++++++++ arch/arm/mm/ioremap.c | 7 + arch/arm/plat-omap/include/mach/iommu.h | 178 ++++++ arch/arm/plat-omap/include/mach/iommu2.h | 92 +++ arch/arm/plat-omap/include/mach/iovmm.h | 93 +++ arch/arm/plat-omap/iommu-sysfs.c | 407 +++++++++++++ arch/arm/plat-omap/iommu.c | 805 ++++++++++++++++++++++++++ arch/arm/plat-omap/iopgtable.h | 69 +++ arch/arm/plat-omap/iovmm.c | 910 ++++++++++++++++++++++++++++++ 10 files changed, 2936 insertions(+), 0 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
