Re: [PATCH v12 5/7] iommu/mediatek: Add MT8188 IOMMU Support
From: Chen-Yu Tsai <wenst@chromium.org>
Date: 2023-08-08 18:18:45
Also in:
linux-devicetree, linux-iommu, linux-mediatek, lkml
On Fri, Jun 2, 2023 at 5:04 PM Yong Wu [off-list ref] wrote:
quoted hunk ↗ jump to hunk
From: "Chengci.Xu" <redacted> MT8188 has 3 IOMMU, containing 2 MM IOMMUs, one is for vdo, the other is for vpp. and 1 INFRA IOMMU. Signed-off-by: Chengci.Xu <redacted> Signed-off-by: Yong Wu <yong.wu@mediatek.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> --- drivers/iommu/mtk_iommu.c | 49 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+)diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 9c89cf894a4d..5c66af0c45a8 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c@@ -170,6 +170,7 @@ enum mtk_iommu_plat { M4U_MT8173, M4U_MT8183, M4U_MT8186, + M4U_MT8188, M4U_MT8192, M4U_MT8195, M4U_MT8365,@@ -1593,6 +1594,51 @@ static const struct mtk_iommu_plat_data mt8186_data_mm = { .iova_region_larb_msk = mt8186_larb_region_msk, }; +static const struct mtk_iommu_plat_data mt8188_data_infra = { + .m4u_plat = M4U_MT8188, + .flags = WR_THROT_EN | DCM_DISABLE | STD_AXI_MODE | PM_CLK_AO | + MTK_IOMMU_TYPE_INFRA | IFA_IOMMU_PCIE_SUPPORT | + PGTABLE_PA_35_EN | CFG_IFA_MASTER_IN_ATF,
FWIW, CFG_IFA_MASTER_IN_ATF should not be tied to the compatible string, but set via a DT property. The IOMMU controls are secured by firmware. It is not a property intrinsically tied to the hardware. If on some other project there is no such security requirement and the IOMMU is opened up to non-secure world, and ATF not even having support for the SMC call, this becomes unusable and hard to rectify without introducing a new compatible string. ChenYu
quoted hunk ↗ jump to hunk
+ .inv_sel_reg = REG_MMU_INV_SEL_GEN2, + .banks_num = 1, + .banks_enable = {true}, + .iova_region = single_domain, + .iova_region_nr = ARRAY_SIZE(single_domain), +}; + +static const struct mtk_iommu_plat_data mt8188_data_vdo = { + .m4u_plat = M4U_MT8188, + .flags = HAS_BCLK | HAS_SUB_COMM_3BITS | OUT_ORDER_WR_EN | + WR_THROT_EN | IOVA_34_EN | SHARE_PGTABLE | + PGTABLE_PA_35_EN | MTK_IOMMU_TYPE_MM, + .hw_list = &m4ulist, + .inv_sel_reg = REG_MMU_INV_SEL_GEN2, + .banks_num = 1, + .banks_enable = {true}, + .iova_region = mt8192_multi_dom, + .iova_region_nr = ARRAY_SIZE(mt8192_multi_dom), + .larbid_remap = {{2}, {0}, {21}, {0}, {19}, {9, 10, + 11 /* 11a */, 25 /* 11c */}, + {13, 0, 29 /* 16b */, 30 /* 17b */, 0}, {5}}, +}; + +static const struct mtk_iommu_plat_data mt8188_data_vpp = { + .m4u_plat = M4U_MT8188, + .flags = HAS_BCLK | HAS_SUB_COMM_3BITS | OUT_ORDER_WR_EN | + WR_THROT_EN | IOVA_34_EN | SHARE_PGTABLE | + PGTABLE_PA_35_EN | MTK_IOMMU_TYPE_MM, + .hw_list = &m4ulist, + .inv_sel_reg = REG_MMU_INV_SEL_GEN2, + .banks_num = 1, + .banks_enable = {true}, + .iova_region = mt8192_multi_dom, + .iova_region_nr = ARRAY_SIZE(mt8192_multi_dom), + .larbid_remap = {{1}, {3}, {23}, {7}, {MTK_INVALID_LARBID}, + {12, 15, 24 /* 11b */}, {14, MTK_INVALID_LARBID, + 16 /* 16a */, 17 /* 17a */, MTK_INVALID_LARBID, + 27, 28 /* ccu0 */, MTK_INVALID_LARBID}, {4, 6}}, +}; + static const unsigned int mt8192_larb_region_msk[MT8192_MULTI_REGION_NR_MAX][MTK_LARB_NR_MAX] = { [0] = {~0, ~0}, /* Region0: larb0/1 */ [1] = {0, 0, 0, 0, ~0, ~0, 0, ~0}, /* Region1: larb4/5/7 */@@ -1701,6 +1747,9 @@ static const struct of_device_id mtk_iommu_of_ids[] = { { .compatible = "mediatek,mt8173-m4u", .data = &mt8173_data}, { .compatible = "mediatek,mt8183-m4u", .data = &mt8183_data}, { .compatible = "mediatek,mt8186-iommu-mm", .data = &mt8186_data_mm}, /* mm: m4u */ + { .compatible = "mediatek,mt8188-iommu-infra", .data = &mt8188_data_infra}, + { .compatible = "mediatek,mt8188-iommu-vdo", .data = &mt8188_data_vdo}, + { .compatible = "mediatek,mt8188-iommu-vpp", .data = &mt8188_data_vpp}, { .compatible = "mediatek,mt8192-m4u", .data = &mt8192_data}, { .compatible = "mediatek,mt8195-iommu-infra", .data = &mt8195_data_infra}, { .compatible = "mediatek,mt8195-iommu-vdo", .data = &mt8195_data_vdo}, --2.25.1
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