On Wed, Feb 17, 2016 at 08:46:13AM +0800, Yong Wu wrote:
> This patch adds support for mediatek m4u (MultiMedia Memory Management
> Unit).
>
> Signed-off-by: Yong Wu <yong...@mediatek.com>
> Reviewed-by: Robin Murphy <robin.mur...@arm.com>
>
> ---
> drivers/iommu/Kconfig | 16 +
> drivers/iommu/Makefile | 1 +
> drivers/iommu/mtk_iommu.c | 732
> ++++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 749 insertions(+)
> create mode 100644 drivers/iommu/mtk_iommu.c
>
> diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
> index a1e75cb..4922aa8 100644
> --- a/drivers/iommu/Kconfig
> +++ b/drivers/iommu/Kconfig
> @@ -318,4 +318,20 @@ config S390_IOMMU
> help
> Support for the IOMMU API for s390 PCI devices.
>
> +config MTK_IOMMU
> + bool "MTK IOMMU Support"
> + depends on ARM || ARM64
> + depends on ARCH_MEDIATEK || COMPILE_TEST
> + select IOMMU_API
> + select IOMMU_DMA
> + select IOMMU_IO_PGTABLE_ARMV7S
> + select MEMORY
> + select MTK_SMI
> + help
> + Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia
> + Memory Management Unit. This option enables remapping of DMA memory
> + accesses for the multimedia subsystem.
> +
> + If unsure, say N here.
> +
> endif # IOMMU_SUPPORT
> diff --git a/drivers/iommu/Makefile b/drivers/iommu/Makefile
> index 42fc0c2..44ae2e0 100644
> --- a/drivers/iommu/Makefile
> +++ b/drivers/iommu/Makefile
> @@ -16,6 +16,7 @@ obj-$(CONFIG_INTEL_IOMMU) += intel-iommu.o
> obj-$(CONFIG_INTEL_IOMMU_SVM) += intel-svm.o
> obj-$(CONFIG_IPMMU_VMSA) += ipmmu-vmsa.o
> obj-$(CONFIG_IRQ_REMAP) += intel_irq_remapping.o irq_remapping.o
> +obj-$(CONFIG_MTK_IOMMU) += mtk_iommu.o
> obj-$(CONFIG_OMAP_IOMMU) += omap-iommu.o
> obj-$(CONFIG_OMAP_IOMMU_DEBUG) += omap-iommu-debug.o
> obj-$(CONFIG_ROCKCHIP_IOMMU) += rockchip-iommu.o
> diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> new file mode 100644
> index 0000000..60fe97b
> --- /dev/null
> +++ b/drivers/iommu/mtk_iommu.c
> @@ -0,0 +1,732 @@
> +/*
> + * Copyright (c) 2015-2016 MediaTek Inc.
> + * Author: Yong Wu <yong...@mediatek.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +#include <linux/clk.h>
> +#include <linux/component.h>
> +#include <linux/dma-iommu.h>
> +#include <linux/interrupt.h>
> +#include <linux/io.h>
> +#include <linux/iommu.h>
> +#include <linux/iopoll.h>
> +#include <linux/list.h>
> +#include <linux/module.h>
> +#include <linux/of_address.h>
> +#include <linux/of_iommu.h>
> +#include <linux/of_irq.h>
> +#include <linux/of_platform.h>
> +#include <linux/platform_device.h>
> +#include <soc/mediatek/smi.h>
> +#include <dt-bindings/memory/mt8173-larb-port.h>
> +
Some missing includes:
linux/bug.h
for WARN_ON()
linux/device.h
for dev_xxx() error messages, dev_get_drvdata(), etc.
linux/err.h
for error functions (IS_ERR, error definitions)
linux/slab.h
for kzalloc() etc.
linux/spinlock.h
for spinlock functions
asm/barrier.h
for wmb()
Guenter
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