Re: [PATCH v3 RE-SEND 2/2] iommu/exynos: Add iommu driver for ExynosPlatforms
From: Sylwester Nawrocki
Date: Fri Oct 07 2011 - 16:46:47 EST
On 10/07/2011 12:09 PM, Kukjin Kim wrote:
> From: KyongHo Cho<pullip.cho@xxxxxxxxxxx>
> This is the System MMU driver and IOMMU API implementation for
> Exynos SOC platforms. Exynos platforms has more than 10 System
> MMUs dedicated for each multimedia accellerators.
> The System MMU driver is already in arc/arm/plat-s5p but it is
> moved to drivers/iommu due to Ohad Ben-Cohen gathered IOMMU drivers
> This patch also includes fault handling feature in IOMMU driver
> suggested by Ohad.
> Users of IOMMU API can register its own fault handler with
> iommu_set_fault_handler() and the handler is called by IRQ handler
> of System MMU.
> If no user installs fault handler, IOMMU driver prints debugging
> message and generates kernel oops.
> This IOMMU driver calls bus_set_iommu() instead of register_iommu()
> since Joerg suggested that installing iommu_ops in bus_type.
> Cc: Joerg Roedel<joerg.roedel@xxxxxxx>
> Cc: Ohad Ben-Cohen<ohad@xxxxxxxxxx>
> Signed-off-by: KyongHo Cho<pullip.cho@xxxxxxxxxxx>
> Signed-off-by: Kukjin Kim<kgene.kim@xxxxxxxxxxx>
> NOTE: Since previous sending has problem, I'm re-sending.
> Sorry, please kindly ignore previous one.
> arch/arm/plat-s5p/Kconfig | 14 -
> arch/arm/plat-s5p/Makefile | 1 -
> arch/arm/plat-s5p/sysmmu.c | 312 ---------
> arch/arm/plat-samsung/include/plat/sysmmu.h | 95 ---
> drivers/iommu/Kconfig | 14 +
> drivers/iommu/Makefile | 1 +
> drivers/iommu/exynos_iommu.c | 963 +++++++++++++++++++++++++++
> 7 files changed, 978 insertions(+), 422 deletions(-)
> delete mode 100644 arch/arm/plat-s5p/sysmmu.c
> delete mode 100644 arch/arm/plat-samsung/include/plat/sysmmu.h
> create mode 100644 drivers/iommu/exynos_iommu.c
> diff --git a/arch/arm/plat-s5p/Kconfig b/arch/arm/plat-s5p/Kconfig
> index 7b9dada..fa374cc 100644
> --- a/arch/arm/plat-s5p/Kconfig
> +++ b/arch/arm/plat-s5p/Kconfig
> @@ -46,20 +46,6 @@ config S5P_PM
> Common code for power management support on S5P and newer SoCs
> Note: Do not select this for S5P6440 and S5P6450.
> -comment "System MMU"
> -config S5P_SYSTEM_MMU
> - bool "S5P SYSTEM MMU"
> - depends on ARCH_EXYNOS4
> - help
> - Say Y here if you want to enable System MMU
> -config S5P_SLEEP
> - bool
> - help
> - Internal config node to apply common S5P sleep management code.
> - Can be selected by S5P and newer SoCs with similar sleep procedure.
Is S5P_SLEEP being removed intentionally ? It doesn't seem to belong here.
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