linux-kernel - Re: [PATCH v7 11/21] iommu/mediatek: Move vld_pa_rng into plat

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Message-ID: <6f2d77af-a965-add5-2a3f-fd55f574d912@gmail.com>
Date:   Mon, 17 Jun 2019 12:27:46 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Yong Wu <yong.wu@...iatek.com>, Joerg Roedel <joro@...tes.org>,
        Robin Murphy <robin.murphy@....com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Evan Green <evgreen@...omium.org>, Tomasz Figa <tfiga@...gle.com>,
        Will Deacon <will.deacon@....com>,
        linux-mediatek@...ts.infradead.org, srv_heupstream@...iatek.com,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        iommu@...ts.linux-foundation.org, yingjoe.chen@...iatek.com,
        youlin.pei@...iatek.com, Nicolas Boichat <drinkcat@...omium.org>,
        anan.sun@...iatek.com, Matthias Kaehlcke <mka@...omium.org>
Subject: Re: [PATCH v7 11/21] iommu/mediatek: Move vld_pa_rng into plat_data



On 10/06/2019 14:17, Yong Wu wrote:
> Both mt8173 and mt8183 don't have this vld_pa_rng(valid physical address
> range) register while mt2712 have. Move it into the plat_data.
> 
> Signed-off-by: Yong Wu <yong.wu@...iatek.com>
> Reviewed-by: Evan Green <evgreen@...omium.org>

Reviewed-by: Matthias Brugger <matthias.bgg@...il.com>

> ---
>  drivers/iommu/mtk_iommu.c | 3 ++-
>  drivers/iommu/mtk_iommu.h | 1 +
>  2 files changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> index 8ac7034..a535dcd 100644
> --- a/drivers/iommu/mtk_iommu.c
> +++ b/drivers/iommu/mtk_iommu.c
> @@ -547,7 +547,7 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data)
>  			 upper_32_bits(data->protect_base);
>  	writel_relaxed(regval, data->base + REG_MMU_IVRP_PADDR);
>  
> -	if (data->enable_4GB && data->plat_data->m4u_plat != M4U_MT8173) {
> +	if (data->enable_4GB && data->plat_data->has_vld_pa_rng) {
>  		/*
>  		 * If 4GB mode is enabled, the validate PA range is from
>  		 * 0x1_0000_0000 to 0x1_ffff_ffff. here record bit[32:30].
> @@ -744,6 +744,7 @@ static int __maybe_unused mtk_iommu_resume(struct device *dev)
>  	.m4u_plat     = M4U_MT2712,
>  	.has_4gb_mode = true,
>  	.has_bclk     = true,
> +	.has_vld_pa_rng   = true,
>  	.larbid_remap = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9},
>  };
>  
> diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h
> index 55d73c1..e5c9dde 100644
> --- a/drivers/iommu/mtk_iommu.h
> +++ b/drivers/iommu/mtk_iommu.h
> @@ -47,6 +47,7 @@ struct mtk_iommu_plat_data {
>  	/* HW will use the EMI clock if there isn't the "bclk". */
>  	bool                has_bclk;
>  	bool                reset_axi;
> +	bool                has_vld_pa_rng;
>  	unsigned char       larbid_remap[MTK_LARB_NR_MAX];
>  };
>  
>