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author | Yong Wu <yong.wu@mediatek.com> | 2017-08-21 19:00:16 +0800 |
---|---|---|
committer | Joerg Roedel <jroedel@suse.de> | 2017-08-22 16:37:58 +0200 |
commit | e6dec92308628cff5f1f8bd1bcdf87581c9dc676 (patch) | |
tree | d17007990ff95de3df378b2d6625f25e8b815b54 /drivers/iommu/mtk_iommu.c | |
parent | a9467d954226f1a513cfe789a3a39d8fc73b5d16 (diff) | |
download | linux-e6dec92308628cff5f1f8bd1bcdf87581c9dc676.tar.bz2 |
iommu/mediatek: Add mt2712 IOMMU support
The M4U IP blocks in mt2712 is MTK's generation2 M4U which use the
ARM Short-descriptor like mt8173, and most of the HW registers are
the same.
The difference is that there are 2 M4U HWs in mt2712 while there's
only one in mt8173. The purpose of 2 M4U HWs is for balance the
bandwidth.
Normally if there are 2 M4U HWs, there should be 2 iommu domains,
each M4U has a iommu domain.
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/mtk_iommu.c')
-rw-r--r-- | drivers/iommu/mtk_iommu.c | 71 |
1 files changed, 34 insertions, 37 deletions
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 4db6c8f66b0c..df23e0201336 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -53,7 +53,11 @@ #define REG_MMU_CTRL_REG 0x110 #define F_MMU_PREFETCH_RT_REPLACE_MOD BIT(4) -#define F_MMU_TF_PROTECT_SEL(prot) (((prot) & 0x3) << 5) +#define F_MMU_TF_PROTECT_SEL_SHIFT(data) \ + ((data)->m4u_plat == M4U_MT2712 ? 4 : 5) +/* It's named by F_MMU_TF_PROT_SEL in mt2712. */ +#define F_MMU_TF_PROTECT_SEL(prot, data) \ + (((prot) & 0x3) << F_MMU_TF_PROTECT_SEL_SHIFT(data)) #define REG_MMU_IVRP_PADDR 0x114 #define F_MMU_IVRP_PA_SET(pa, ext) (((pa) >> 1) | ((!!(ext)) << 31)) @@ -96,7 +100,7 @@ * Get the local arbiter ID and the portid within the larb arbiter * from mtk_m4u_id which is defined by MTK_M4U_ID. */ -#define MTK_M4U_TO_LARB(id) (((id) >> 5) & 0x7) +#define MTK_M4U_TO_LARB(id) (((id) >> 5) & 0xf) #define MTK_M4U_TO_PORT(id) ((id) & 0x1f) struct mtk_iommu_domain { @@ -307,10 +311,6 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain, data->m4u_dom = NULL; return ret; } - } else if (data->m4u_dom != dom) { - /* All the client devices should be in the same m4u domain */ - dev_err(dev, "try to attach into the error iommu domain\n"); - return -EPERM; } mtk_iommu_config(data, dev, true); @@ -470,8 +470,9 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data) return ret; } - regval = F_MMU_PREFETCH_RT_REPLACE_MOD | - F_MMU_TF_PROTECT_SEL(2); + regval = F_MMU_TF_PROTECT_SEL(2, data); + if (data->m4u_plat == M4U_MT8173) + regval |= F_MMU_PREFETCH_RT_REPLACE_MOD; writel_relaxed(regval, data->base + REG_MMU_CTRL_REG); regval = F_L2_MULIT_HIT_EN | @@ -493,9 +494,11 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data) writel_relaxed(F_MMU_IVRP_PA_SET(data->protect_base, data->enable_4GB), data->base + REG_MMU_IVRP_PADDR); - writel_relaxed(0, data->base + REG_MMU_DCM_DIS); - writel_relaxed(0, data->base + REG_MMU_STANDARD_AXI_MODE); + + /* It's MISC control register whose default value is ok except mt8173.*/ + if (data->m4u_plat == M4U_MT8173) + writel_relaxed(0, data->base + REG_MMU_STANDARD_AXI_MODE); if (devm_request_irq(data->dev, data->irq, mtk_iommu_isr, 0, dev_name(data->dev), (void *)data)) { @@ -527,6 +530,7 @@ static int mtk_iommu_probe(struct platform_device *pdev) if (!data) return -ENOMEM; data->dev = dev; + data->m4u_plat = (enum mtk_iommu_plat)of_device_get_match_data(dev); /* Protect memory. HW will access here while translation fault.*/ protect = devm_kzalloc(dev, MTK_PROTECT_PA_ALIGN * 2, GFP_KERNEL); @@ -560,6 +564,7 @@ static int mtk_iommu_probe(struct platform_device *pdev) for (i = 0; i < larb_nr; i++) { struct device_node *larbnode; struct platform_device *plarbdev; + u32 id; larbnode = of_parse_phandle(dev->of_node, "mediatek,larbs", i); if (!larbnode) @@ -568,17 +573,14 @@ static int mtk_iommu_probe(struct platform_device *pdev) if (!of_device_is_available(larbnode)) continue; + ret = of_property_read_u32(larbnode, "mediatek,larb-id", &id); + if (ret)/* The id is consecutive if there is no this property */ + id = i; + plarbdev = of_find_device_by_node(larbnode); - if (!plarbdev) { - plarbdev = of_platform_device_create( - larbnode, NULL, - platform_bus_type.dev_root); - if (!plarbdev) { - of_node_put(larbnode); - return -EPROBE_DEFER; - } - } - data->smi_imu.larb_imu[i].dev = &plarbdev->dev; + if (!plarbdev) + return -EPROBE_DEFER; + data->smi_imu.larb_imu[id].dev = &plarbdev->dev; component_match_add_release(dev, &match, release_of, compare_of, larbnode); @@ -646,8 +648,6 @@ static int __maybe_unused mtk_iommu_resume(struct device *dev) struct mtk_iommu_suspend_reg *reg = &data->reg; void __iomem *base = data->base; - writel_relaxed(data->m4u_dom->cfg.arm_v7s_cfg.ttbr[0], - base + REG_MMU_PT_BASE_ADDR); writel_relaxed(reg->standard_axi_mode, base + REG_MMU_STANDARD_AXI_MODE); writel_relaxed(reg->dcm_dis, base + REG_MMU_DCM_DIS); @@ -656,15 +656,19 @@ static int __maybe_unused mtk_iommu_resume(struct device *dev) writel_relaxed(reg->int_main_control, base + REG_MMU_INT_MAIN_CONTROL); writel_relaxed(F_MMU_IVRP_PA_SET(data->protect_base, data->enable_4GB), base + REG_MMU_IVRP_PADDR); + if (data->m4u_dom) + writel(data->m4u_dom->cfg.arm_v7s_cfg.ttbr[0], + base + REG_MMU_PT_BASE_ADDR); return 0; } -const struct dev_pm_ops mtk_iommu_pm_ops = { +static const struct dev_pm_ops mtk_iommu_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(mtk_iommu_suspend, mtk_iommu_resume) }; static const struct of_device_id mtk_iommu_of_ids[] = { - { .compatible = "mediatek,mt8173-m4u", }, + { .compatible = "mediatek,mt2712-m4u", .data = (void *)M4U_MT2712}, + { .compatible = "mediatek,mt8173-m4u", .data = (void *)M4U_MT8173}, {} }; @@ -673,27 +677,20 @@ static struct platform_driver mtk_iommu_driver = { .remove = mtk_iommu_remove, .driver = { .name = "mtk-iommu", - .of_match_table = mtk_iommu_of_ids, + .of_match_table = of_match_ptr(mtk_iommu_of_ids), .pm = &mtk_iommu_pm_ops, } }; -static int mtk_iommu_init_fn(struct device_node *np) +static int __init mtk_iommu_init(void) { int ret; - struct platform_device *pdev; - - pdev = of_platform_device_create(np, NULL, platform_bus_type.dev_root); - if (!pdev) - return -ENOMEM; ret = platform_driver_register(&mtk_iommu_driver); - if (ret) { - pr_err("%s: Failed to register driver\n", __func__); - return ret; - } + if (ret != 0) + pr_err("Failed to register MTK IOMMU driver\n"); - return 0; + return ret; } -IOMMU_OF_DECLARE(mtkm4u, "mediatek,mt8173-m4u", mtk_iommu_init_fn); +subsys_initcall(mtk_iommu_init) |