linux-kernel - Re: [PATCH v4 4/7] iommu/mediatek: Move inv_sel_reg into the plat

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Date:   Wed, 17 Jun 2020 11:09:12 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Chao Hao <chao.hao@...iatek.com>, Joerg Roedel <joro@...tes.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     iommu@...ts.linux-foundation.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, wsd_upstream@...iatek.com,
        Yong Wu <yong.wu@...iatek.com>, FY Yang <fy.yang@...iatek.com>
Subject: Re: [PATCH v4 4/7] iommu/mediatek: Move inv_sel_reg into the
 plat_data



On 17/06/2020 05:00, Chao Hao wrote:
> For mt6779, MMU_INV_SEL register's offset is changed from
> 0x38 to 0x2c, so we can put inv_sel_reg in the plat_data to
> use it.
> In addition, we renamed it to REG_MMU_INV_SEL_GEN1 and use it
> before mt6779.
> 
> Change since v3:
> 1. Fix coding style
> 
> Cc: Yong Wu <yong.wu@...iatek.com>
> Signed-off-by: Chao Hao <chao.hao@...iatek.com>

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

> ---
>  drivers/iommu/mtk_iommu.c | 19 +++++++++++--------
>  drivers/iommu/mtk_iommu.h |  1 +
>  2 files changed, 12 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> index 239d2cdbbc9f..f23919feba4e 100644
> --- a/drivers/iommu/mtk_iommu.c
> +++ b/drivers/iommu/mtk_iommu.c
> @@ -37,7 +37,7 @@
>  #define REG_MMU_INVLD_START_A			0x024
>  #define REG_MMU_INVLD_END_A			0x028
>  
> -#define REG_MMU_INV_SEL				0x038
> +#define REG_MMU_INV_SEL_GEN1			0x038
>  #define F_INVLD_EN0				BIT(0)
>  #define F_INVLD_EN1				BIT(1)
>  
> @@ -168,7 +168,7 @@ static void mtk_iommu_tlb_flush_all(void *cookie)
>  
>  	for_each_m4u(data) {
>  		writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0,
> -			       data->base + REG_MMU_INV_SEL);
> +			       data->base + data->plat_data->inv_sel_reg);
>  		writel_relaxed(F_ALL_INVLD, data->base + REG_MMU_INVALIDATE);
>  		wmb(); /* Make sure the tlb flush all done */
>  	}
> @@ -185,7 +185,7 @@ static void mtk_iommu_tlb_flush_range_sync(unsigned long iova, size_t size,
>  	for_each_m4u(data) {
>  		spin_lock_irqsave(&data->tlb_lock, flags);
>  		writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0,
> -			       data->base + REG_MMU_INV_SEL);
> +			       data->base + data->plat_data->inv_sel_reg);
>  
>  		writel_relaxed(iova, data->base + REG_MMU_INVLD_START_A);
>  		writel_relaxed(iova + size - 1,
> @@ -773,11 +773,12 @@ static const struct dev_pm_ops mtk_iommu_pm_ops = {
>  };
>  
>  static const struct mtk_iommu_plat_data mt2712_data = {
> -	.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},
> +	.m4u_plat       = M4U_MT2712,
> +	.has_4gb_mode   = true,
> +	.has_bclk       = true,
> +	.has_vld_pa_rng = true,
> +	.inv_sel_reg    = REG_MMU_INV_SEL_GEN1,
> +	.larbid_remap   = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9},
>  };
>  
>  static const struct mtk_iommu_plat_data mt8173_data = {
> @@ -785,12 +786,14 @@ static const struct mtk_iommu_plat_data mt8173_data = {
>  	.has_4gb_mode = true,
>  	.has_bclk     = true,
>  	.reset_axi    = true,
> +	.inv_sel_reg  = REG_MMU_INV_SEL_GEN1,
>  	.larbid_remap = {0, 1, 2, 3, 4, 5}, /* Linear mapping. */
>  };
>  
>  static const struct mtk_iommu_plat_data mt8183_data = {
>  	.m4u_plat     = M4U_MT8183,
>  	.reset_axi    = true,
> +	.inv_sel_reg  = REG_MMU_INV_SEL_GEN1,
>  	.larbid_remap = {0, 4, 5, 6, 7, 2, 3, 1},
>  };
>  
> diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h
> index d711ac630037..afd7a2de5c1e 100644
> --- a/drivers/iommu/mtk_iommu.h
> +++ b/drivers/iommu/mtk_iommu.h
> @@ -43,6 +43,7 @@ struct mtk_iommu_plat_data {
>  	bool		    has_misc_ctrl;
>  	bool                has_vld_pa_rng;
>  	bool                reset_axi;
> +	u32                 inv_sel_reg;
>  	unsigned char       larbid_remap[MTK_LARB_NR_MAX];
>  };
>  
>