On Sat, 2020-05-09 at 16:36 +0800, Chao Hao wrote:
> 1. Start from mt6779, INVLDT_SEL move to offset=0x2c, so we add
> REG_MMU_INV_SEL_GEN2 definition and mt6779 uses it.
> 2. Change PROTECT_PA_ALIGN from 128 byte to 256 byte.
> 3. For REG_MMU_CTRL_REG register, we only need to change bit[2:0],
> others bits keep default value, ex: enable victim tlb.
> 4. Add mt6779_data to support mm_iommu HW init.
>
> Signed-off-by: Chao Hao <chao....@mediatek.com>
> ---
> drivers/iommu/mtk_iommu.c | 18 +++++++++++++++---
> drivers/iommu/mtk_iommu.h | 1 +
> 2 files changed, 16 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> index dc9ae944e712..34c4ffb77c73 100644
> --- a/drivers/iommu/mtk_iommu.c
> +++ b/drivers/iommu/mtk_iommu.c
> @@ -37,6 +37,7 @@
> #define REG_MMU_INVLD_START_A 0x024
> #define REG_MMU_INVLD_END_A 0x028
>
> +#define REG_MMU_INV_SEL_GEN2 0x02c
> #define REG_MMU_INV_SEL_GEN1 0x038
Normally the register name comes from the CODA. In the lasted CODA,
this is called "MMU_INVLDT_SEL". But it's same with the previous 0x38
totally. Using _GEN1, _GEN2 is ok for me. Please add its coda name in
the comment. like:
#define REG_MMU_INV_SEL_GEN2 0x02c /* MMU_INVLDT_SEL */
> #define F_INVLD_EN0 BIT(0)
> #define F_INVLD_EN1 BIT(1)
> @@ -97,7 +98,7 @@
> #define F_MMU_INT_ID_LARB_ID(a) (((a) >> 7) & 0x7)
> #define F_MMU_INT_ID_PORT_ID(a) (((a) >> 2) & 0x1f)
>
> -#define MTK_PROTECT_PA_ALIGN 128
> +#define MTK_PROTECT_PA_ALIGN 256
>
> /*
> * Get the local arbiter ID and the portid within the larb arbiter
> @@ -554,11 +555,12 @@ static int mtk_iommu_hw_init(const struct
> mtk_iommu_data *data)
> return ret;
> }
>
> + regval = readl_relaxed(data->base + REG_MMU_CTRL_REG);
> if (data->plat_data->m4u_plat == M4U_MT8173)
> - regval = F_MMU_PREFETCH_RT_REPLACE_MOD |
> + regval |= F_MMU_PREFETCH_RT_REPLACE_MOD |
The default value is not ok for mt8173(Its bit9 is in_order_write_en, we
could not use its default 1'b1). thus, Don't touch this line.
> F_MMU_TF_PROT_TO_PROGRAM_ADDR_MT8173;
> else
> - regval = F_MMU_TF_PROT_TO_PROGRAM_ADDR;
> + regval |= F_MMU_TF_PROT_TO_PROGRAM_ADDR;
> writel_relaxed(regval, data->base + REG_MMU_CTRL_REG);
>
> regval = F_L2_MULIT_HIT_EN |
> @@ -804,6 +806,15 @@ static const struct mtk_iommu_plat_data mt2712_data = {
> .larbid_remap = {{0}, {1}, {2}, {3}, {4}, {5}, {6}, {7}},
> };
>
> +static const struct mtk_iommu_plat_data mt6779_data = {
> + .m4u_plat = M4U_MT6779,
> + .larbid_remap = {{0}, {1}, {2}, {3}, {5}, {7, 8}, {10}, {9}},
> + .has_sub_comm = true,
> + .has_wr_len = true,
> + .has_misc_ctrl = true,
> + .inv_sel_reg = REG_MMU_INV_SEL_GEN2,
align '=' a bit.
> +};
> +
> static const struct mtk_iommu_plat_data mt8173_data = {
> .m4u_plat = M4U_MT8173,
> .has_4gb_mode = true,
> @@ -822,6 +833,7 @@ static const struct mtk_iommu_plat_data mt8183_data = {
>
> static const struct of_device_id mtk_iommu_of_ids[] = {
> { .compatible = "mediatek,mt2712-m4u", .data = &mt2712_data},
> + { .compatible = "mediatek,mt6779-m4u", .data = &mt6779_data},
> { .compatible = "mediatek,mt8173-m4u", .data = &mt8173_data},
> { .compatible = "mediatek,mt8183-m4u", .data = &mt8183_data},
> {}
> diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h
> index 9971cedd72ea..fb79e710c8d9 100644
> --- a/drivers/iommu/mtk_iommu.h
> +++ b/drivers/iommu/mtk_iommu.h
> @@ -31,6 +31,7 @@ struct mtk_iommu_suspend_reg {
> enum mtk_iommu_plat {
> M4U_MT2701,
> M4U_MT2712,
> + M4U_MT6779,
> M4U_MT8173,
> M4U_MT8183,
> };
