| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Yong Wu | 3197 | 91.45% | 12 | 50.00% |
| Robin Murphy | 148 | 4.23% | 5 | 20.83% |
| Joerg Roedel | 142 | 4.06% | 1 | 4.17% |
| Russell King | 3 | 0.09% | 1 | 4.17% |
| Arnd Bergmann | 2 | 0.06% | 1 | 4.17% |
| Mike Rapoport | 1 | 0.03% | 1 | 4.17% |
| Honghui Zhang | 1 | 0.03% | 1 | 4.17% |
| Dan Carpenter | 1 | 0.03% | 1 | 4.17% |
| Andrzej Hajda | 1 | 0.03% | 1 | 4.17% |
| Total | 3496 | 24 |
/* * Copyright (c) 2015-2016 MediaTek Inc. * Author: Yong Wu <yong.wu@mediatek.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/memblock.h> #include <linux/bug.h> #include <linux/clk.h> #include <linux/component.h> #include <linux/device.h> #include <linux/dma-iommu.h> #include <linux/err.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/iommu.h> #include <linux/iopoll.h> #include <linux/list.h> #include <linux/of_address.h> #include <linux/of_iommu.h> #include <linux/of_irq.h> #include <linux/of_platform.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <asm/barrier.h> #include <soc/mediatek/smi.h> #include "mtk_iommu.h" #define REG_MMU_PT_BASE_ADDR 0x000 #define REG_MMU_INVALIDATE 0x020 #define F_ALL_INVLD 0x2 #define F_MMU_INV_RANGE 0x1 #define REG_MMU_INVLD_START_A 0x024 #define REG_MMU_INVLD_END_A 0x028 #define REG_MMU_INV_SEL 0x038 #define F_INVLD_EN0 BIT(0) #define F_INVLD_EN1 BIT(1) #define REG_MMU_STANDARD_AXI_MODE 0x048 #define REG_MMU_DCM_DIS 0x050 #define REG_MMU_CTRL_REG 0x110 #define F_MMU_PREFETCH_RT_REPLACE_MOD BIT(4) #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 REG_MMU_VLD_PA_RNG 0x118 #define F_MMU_VLD_PA_RNG(EA, SA) (((EA) << 8) | (SA)) #define REG_MMU_INT_CONTROL0 0x120 #define F_L2_MULIT_HIT_EN BIT(0) #define F_TABLE_WALK_FAULT_INT_EN BIT(1) #define F_PREETCH_FIFO_OVERFLOW_INT_EN BIT(2) #define F_MISS_FIFO_OVERFLOW_INT_EN BIT(3) #define F_PREFETCH_FIFO_ERR_INT_EN BIT(5) #define F_MISS_FIFO_ERR_INT_EN BIT(6) #define F_INT_CLR_BIT BIT(12) #define REG_MMU_INT_MAIN_CONTROL 0x124 #define F_INT_TRANSLATION_FAULT BIT(0) #define F_INT_MAIN_MULTI_HIT_FAULT BIT(1) #define F_INT_INVALID_PA_FAULT BIT(2) #define F_INT_ENTRY_REPLACEMENT_FAULT BIT(3) #define F_INT_TLB_MISS_FAULT BIT(4) #define F_INT_MISS_TRANSACTION_FIFO_FAULT BIT(5) #define F_INT_PRETETCH_TRANSATION_FIFO_FAULT BIT(6) #define REG_MMU_CPE_DONE 0x12C #define REG_MMU_FAULT_ST1 0x134 #define REG_MMU_FAULT_VA 0x13c #define F_MMU_FAULT_VA_WRITE_BIT BIT(1) #define F_MMU_FAULT_VA_LAYER_BIT BIT(0) #define REG_MMU_INVLD_PA 0x140 #define REG_MMU_INT_ID 0x150 #define F_MMU0_INT_ID_LARB_ID(a) (((a) >> 7) & 0x7) #define F_MMU0_INT_ID_PORT_ID(a) (((a) >> 2) & 0x1f) #define MTK_PROTECT_PA_ALIGN 128 /* * 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) & 0xf) #define MTK_M4U_TO_PORT(id) ((id) & 0x1f) struct mtk_iommu_domain { spinlock_t pgtlock; /* lock for page table */ struct io_pgtable_cfg cfg; struct io_pgtable_ops *iop; struct iommu_domain domain; }; static struct iommu_ops mtk_iommu_ops; static LIST_HEAD(m4ulist); /* List all the M4U HWs */ #define for_each_m4u(data) list_for_each_entry(data, &m4ulist, list) /* * There may be 1 or 2 M4U HWs, But we always expect they are in the same domain * for the performance. * * Here always return the mtk_iommu_data of the first probed M4U where the * iommu domain information is recorded. */ static struct mtk_iommu_data *mtk_iommu_get_m4u_data(void) { struct mtk_iommu_data *data; for_each_m4u(data) return data; return NULL; } static struct mtk_iommu_domain *to_mtk_domain(struct iommu_domain *dom) { return container_of(dom, struct mtk_iommu_domain, domain); } static void mtk_iommu_tlb_flush_all(void *cookie) { struct mtk_iommu_data *data = cookie; for_each_m4u(data) { writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0, data->base + REG_MMU_INV_SEL); writel_relaxed(F_ALL_INVLD, data->base + REG_MMU_INVALIDATE); wmb(); /* Make sure the tlb flush all done */ } } static void mtk_iommu_tlb_add_flush_nosync(unsigned long iova, size_t size, size_t granule, bool leaf, void *cookie) { struct mtk_iommu_data *data = cookie; for_each_m4u(data) { writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0, data->base + REG_MMU_INV_SEL); writel_relaxed(iova, data->base + REG_MMU_INVLD_START_A); writel_relaxed(iova + size - 1, data->base + REG_MMU_INVLD_END_A); writel_relaxed(F_MMU_INV_RANGE, data->base + REG_MMU_INVALIDATE); data->tlb_flush_active = true; } } static void mtk_iommu_tlb_sync(void *cookie) { struct mtk_iommu_data *data = cookie; int ret; u32 tmp; for_each_m4u(data) { /* Avoid timing out if there's nothing to wait for */ if (!data->tlb_flush_active) return; ret = readl_poll_timeout_atomic(data->base + REG_MMU_CPE_DONE, tmp, tmp != 0, 10, 100000); if (ret) { dev_warn(data->dev, "Partial TLB flush timed out, falling back to full flush\n"); mtk_iommu_tlb_flush_all(cookie); } /* Clear the CPE status */ writel_relaxed(0, data->base + REG_MMU_CPE_DONE); data->tlb_flush_active = false; } } static const struct iommu_gather_ops mtk_iommu_gather_ops = { .tlb_flush_all = mtk_iommu_tlb_flush_all, .tlb_add_flush = mtk_iommu_tlb_add_flush_nosync, .tlb_sync = mtk_iommu_tlb_sync, }; static irqreturn_t mtk_iommu_isr(int irq, void *dev_id) { struct mtk_iommu_data *data = dev_id; struct mtk_iommu_domain *dom = data->m4u_dom; u32 int_state, regval, fault_iova, fault_pa; unsigned int fault_larb, fault_port; bool layer, write; /* Read error info from registers */ int_state = readl_relaxed(data->base + REG_MMU_FAULT_ST1); fault_iova = readl_relaxed(data->base + REG_MMU_FAULT_VA); layer = fault_iova & F_MMU_FAULT_VA_LAYER_BIT; write = fault_iova & F_MMU_FAULT_VA_WRITE_BIT; fault_pa = readl_relaxed(data->base + REG_MMU_INVLD_PA); regval = readl_relaxed(data->base + REG_MMU_INT_ID); fault_larb = F_MMU0_INT_ID_LARB_ID(regval); fault_port = F_MMU0_INT_ID_PORT_ID(regval); if (report_iommu_fault(&dom->domain, data->dev, fault_iova, write ? IOMMU_FAULT_WRITE : IOMMU_FAULT_READ)) { dev_err_ratelimited( data->dev, "fault type=0x%x iova=0x%x pa=0x%x larb=%d port=%d layer=%d %s\n", int_state, fault_iova, fault_pa, fault_larb, fault_port, layer, write ? "write" : "read"); } /* Interrupt clear */ regval = readl_relaxed(data->base + REG_MMU_INT_CONTROL0); regval |= F_INT_CLR_BIT; writel_relaxed(regval, data->base + REG_MMU_INT_CONTROL0); mtk_iommu_tlb_flush_all(data); return IRQ_HANDLED; } static void mtk_iommu_config(struct mtk_iommu_data *data, struct device *dev, bool enable) { struct mtk_smi_larb_iommu *larb_mmu; unsigned int larbid, portid; struct iommu_fwspec *fwspec = dev->iommu_fwspec; int i; for (i = 0; i < fwspec->num_ids; ++i) { larbid = MTK_M4U_TO_LARB(fwspec->ids[i]); portid = MTK_M4U_TO_PORT(fwspec->ids[i]); larb_mmu = &data->smi_imu.larb_imu[larbid]; dev_dbg(dev, "%s iommu port: %d\n", enable ? "enable" : "disable", portid); if (enable) larb_mmu->mmu |= MTK_SMI_MMU_EN(portid); else larb_mmu->mmu &= ~MTK_SMI_MMU_EN(portid); } } static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom) { struct mtk_iommu_data *data = mtk_iommu_get_m4u_data(); spin_lock_init(&dom->pgtlock); dom->cfg = (struct io_pgtable_cfg) { .quirks = IO_PGTABLE_QUIRK_ARM_NS | IO_PGTABLE_QUIRK_NO_PERMS | IO_PGTABLE_QUIRK_TLBI_ON_MAP, .pgsize_bitmap = mtk_iommu_ops.pgsize_bitmap, .ias = 32, .oas = 32, .tlb = &mtk_iommu_gather_ops, .iommu_dev = data->dev, }; if (data->enable_4GB) dom->cfg.quirks |= IO_PGTABLE_QUIRK_ARM_MTK_4GB; dom->iop = alloc_io_pgtable_ops(ARM_V7S, &dom->cfg, data); if (!dom->iop) { dev_err(data->dev, "Failed to alloc io pgtable\n"); return -EINVAL; } /* Update our support page sizes bitmap */ dom->domain.pgsize_bitmap = dom->cfg.pgsize_bitmap; return 0; } static struct iommu_domain *mtk_iommu_domain_alloc(unsigned type) { struct mtk_iommu_domain *dom; if (type != IOMMU_DOMAIN_DMA) return NULL; dom = kzalloc(sizeof(*dom), GFP_KERNEL); if (!dom) return NULL; if (iommu_get_dma_cookie(&dom->domain)) goto free_dom; if (mtk_iommu_domain_finalise(dom)) goto put_dma_cookie; dom->domain.geometry.aperture_start = 0; dom->domain.geometry.aperture_end = DMA_BIT_MASK(32); dom->domain.geometry.force_aperture = true; return &dom->domain; put_dma_cookie: iommu_put_dma_cookie(&dom->domain); free_dom: kfree(dom); return NULL; } static void mtk_iommu_domain_free(struct iommu_domain *domain) { struct mtk_iommu_domain *dom = to_mtk_domain(domain); free_io_pgtable_ops(dom->iop); iommu_put_dma_cookie(domain); kfree(to_mtk_domain(domain)); } static int mtk_iommu_attach_device(struct iommu_domain *domain, struct device *dev) { struct mtk_iommu_domain *dom = to_mtk_domain(domain); struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv; if (!data) return -ENODEV; /* Update the pgtable base address register of the M4U HW */ if (!data->m4u_dom) { data->m4u_dom = dom; writel(dom->cfg.arm_v7s_cfg.ttbr[0], data->base + REG_MMU_PT_BASE_ADDR); } mtk_iommu_config(data, dev, true); return 0; } static void mtk_iommu_detach_device(struct iommu_domain *domain, struct device *dev) { struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv; if (!data) return; mtk_iommu_config(data, dev, false); } static int mtk_iommu_map(struct iommu_domain *domain, unsigned long iova, phys_addr_t paddr, size_t size, int prot) { struct mtk_iommu_domain *dom = to_mtk_domain(domain); unsigned long flags; int ret; spin_lock_irqsave(&dom->pgtlock, flags); ret = dom->iop->map(dom->iop, iova, paddr & DMA_BIT_MASK(32), size, prot); spin_unlock_irqrestore(&dom->pgtlock, flags); return ret; } static size_t mtk_iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size) { struct mtk_iommu_domain *dom = to_mtk_domain(domain); unsigned long flags; size_t unmapsz; spin_lock_irqsave(&dom->pgtlock, flags); unmapsz = dom->iop->unmap(dom->iop, iova, size); spin_unlock_irqrestore(&dom->pgtlock, flags); return unmapsz; } static void mtk_iommu_iotlb_sync(struct iommu_domain *domain) { mtk_iommu_tlb_sync(mtk_iommu_get_m4u_data()); } static phys_addr_t mtk_iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova) { struct mtk_iommu_domain *dom = to_mtk_domain(domain); struct mtk_iommu_data *data = mtk_iommu_get_m4u_data(); unsigned long flags; phys_addr_t pa; spin_lock_irqsave(&dom->pgtlock, flags); pa = dom->iop->iova_to_phys(dom->iop, iova); spin_unlock_irqrestore(&dom->pgtlock, flags); if (data->enable_4GB) pa |= BIT_ULL(32); return pa; } static int mtk_iommu_add_device(struct device *dev) { struct mtk_iommu_data *data; struct iommu_group *group; if (!dev->iommu_fwspec || dev->iommu_fwspec->ops != &mtk_iommu_ops) return -ENODEV; /* Not a iommu client device */ data = dev->iommu_fwspec->iommu_priv; iommu_device_link(&data->iommu, dev); group = iommu_group_get_for_dev(dev); if (IS_ERR(group)) return PTR_ERR(group); iommu_group_put(group); return 0; } static void mtk_iommu_remove_device(struct device *dev) { struct mtk_iommu_data *data; if (!dev->iommu_fwspec || dev->iommu_fwspec->ops != &mtk_iommu_ops) return; data = dev->iommu_fwspec->iommu_priv; iommu_device_unlink(&data->iommu, dev); iommu_group_remove_device(dev); iommu_fwspec_free(dev); } static struct iommu_group *mtk_iommu_device_group(struct device *dev) { struct mtk_iommu_data *data = mtk_iommu_get_m4u_data(); if (!data) return ERR_PTR(-ENODEV); /* All the client devices are in the same m4u iommu-group */ if (!data->m4u_group) { data->m4u_group = iommu_group_alloc(); if (IS_ERR(data->m4u_group)) dev_err(dev, "Failed to allocate M4U IOMMU group\n"); } else { iommu_group_ref_get(data->m4u_group); } return data->m4u_group; } static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args) { struct platform_device *m4updev; if (args->args_count != 1) { dev_err(dev, "invalid #iommu-cells(%d) property for IOMMU\n", args->args_count); return -EINVAL; } if (!dev->iommu_fwspec->iommu_priv) { /* Get the m4u device */ m4updev = of_find_device_by_node(args->np); if (WARN_ON(!m4updev)) return -EINVAL; dev->iommu_fwspec->iommu_priv = platform_get_drvdata(m4updev); } return iommu_fwspec_add_ids(dev, args->args, 1); } static struct iommu_ops mtk_iommu_ops = { .domain_alloc = mtk_iommu_domain_alloc, .domain_free = mtk_iommu_domain_free, .attach_dev = mtk_iommu_attach_device, .detach_dev = mtk_iommu_detach_device, .map = mtk_iommu_map, .unmap = mtk_iommu_unmap, .flush_iotlb_all = mtk_iommu_iotlb_sync, .iotlb_sync = mtk_iommu_iotlb_sync, .iova_to_phys = mtk_iommu_iova_to_phys, .add_device = mtk_iommu_add_device, .remove_device = mtk_iommu_remove_device, .device_group = mtk_iommu_device_group, .of_xlate = mtk_iommu_of_xlate, .pgsize_bitmap = SZ_4K | SZ_64K | SZ_1M | SZ_16M, }; static int mtk_iommu_hw_init(const struct mtk_iommu_data *data) { u32 regval; int ret; ret = clk_prepare_enable(data->bclk); if (ret) { dev_err(data->dev, "Failed to enable iommu bclk(%d)\n", ret); return ret; } 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 | F_TABLE_WALK_FAULT_INT_EN | F_PREETCH_FIFO_OVERFLOW_INT_EN | F_MISS_FIFO_OVERFLOW_INT_EN | F_PREFETCH_FIFO_ERR_INT_EN | F_MISS_FIFO_ERR_INT_EN; writel_relaxed(regval, data->base + REG_MMU_INT_CONTROL0); regval = F_INT_TRANSLATION_FAULT | F_INT_MAIN_MULTI_HIT_FAULT | F_INT_INVALID_PA_FAULT | F_INT_ENTRY_REPLACEMENT_FAULT | F_INT_TLB_MISS_FAULT | F_INT_MISS_TRANSACTION_FIFO_FAULT | F_INT_PRETETCH_TRANSATION_FIFO_FAULT; writel_relaxed(regval, data->base + REG_MMU_INT_MAIN_CONTROL); if (data->m4u_plat == M4U_MT8173) regval = (data->protect_base >> 1) | (data->enable_4GB << 31); else regval = lower_32_bits(data->protect_base) | upper_32_bits(data->protect_base); writel_relaxed(regval, data->base + REG_MMU_IVRP_PADDR); if (data->enable_4GB && data->m4u_plat != M4U_MT8173) { /* * If 4GB mode is enabled, the validate PA range is from * 0x1_0000_0000 to 0x1_ffff_ffff. here record bit[32:30]. */ regval = F_MMU_VLD_PA_RNG(7, 4); writel_relaxed(regval, data->base + REG_MMU_VLD_PA_RNG); } writel_relaxed(0, data->base + REG_MMU_DCM_DIS); /* 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)) { writel_relaxed(0, data->base + REG_MMU_PT_BASE_ADDR); clk_disable_unprepare(data->bclk); dev_err(data->dev, "Failed @ IRQ-%d Request\n", data->irq); return -ENODEV; } return 0; } static const struct component_master_ops mtk_iommu_com_ops = { .bind = mtk_iommu_bind, .unbind = mtk_iommu_unbind, }; static int mtk_iommu_probe(struct platform_device *pdev) { struct mtk_iommu_data *data; struct device *dev = &pdev->dev; struct resource *res; resource_size_t ioaddr; struct component_match *match = NULL; void *protect; int i, larb_nr, ret; data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); 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); if (!protect) return -ENOMEM; data->protect_base = ALIGN(virt_to_phys(protect), MTK_PROTECT_PA_ALIGN); /* Whether the current dram is over 4GB */ data->enable_4GB = !!(max_pfn > (BIT_ULL(32) >> PAGE_SHIFT)); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); data->base = devm_ioremap_resource(dev, res); if (IS_ERR(data->base)) return PTR_ERR(data->base); ioaddr = res->start; data->irq = platform_get_irq(pdev, 0); if (data->irq < 0) return data->irq; data->bclk = devm_clk_get(dev, "bclk"); if (IS_ERR(data->bclk)) return PTR_ERR(data->bclk); larb_nr = of_count_phandle_with_args(dev->of_node, "mediatek,larbs", NULL); if (larb_nr < 0) return larb_nr; data->smi_imu.larb_nr = larb_nr; 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) return -EINVAL; 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) return -EPROBE_DEFER; data->smi_imu.larb_imu[id].dev = &plarbdev->dev; component_match_add_release(dev, &match, release_of, compare_of, larbnode); } platform_set_drvdata(pdev, data); ret = mtk_iommu_hw_init(data); if (ret) return ret; ret = iommu_device_sysfs_add(&data->iommu, dev, NULL, "mtk-iommu.%pa", &ioaddr); if (ret) return ret; iommu_device_set_ops(&data->iommu, &mtk_iommu_ops); iommu_device_set_fwnode(&data->iommu, &pdev->dev.of_node->fwnode); ret = iommu_device_register(&data->iommu); if (ret) return ret; list_add_tail(&data->list, &m4ulist); if (!iommu_present(&platform_bus_type)) bus_set_iommu(&platform_bus_type, &mtk_iommu_ops); return component_master_add_with_match(dev, &mtk_iommu_com_ops, match); } static int mtk_iommu_remove(struct platform_device *pdev) { struct mtk_iommu_data *data = platform_get_drvdata(pdev); iommu_device_sysfs_remove(&data->iommu); iommu_device_unregister(&data->iommu); if (iommu_present(&platform_bus_type)) bus_set_iommu(&platform_bus_type, NULL); clk_disable_unprepare(data->bclk); devm_free_irq(&pdev->dev, data->irq, data); component_master_del(&pdev->dev, &mtk_iommu_com_ops); return 0; } static int __maybe_unused mtk_iommu_suspend(struct device *dev) { struct mtk_iommu_data *data = dev_get_drvdata(dev); struct mtk_iommu_suspend_reg *reg = &data->reg; void __iomem *base = data->base; reg->standard_axi_mode = readl_relaxed(base + REG_MMU_STANDARD_AXI_MODE); reg->dcm_dis = readl_relaxed(base + REG_MMU_DCM_DIS); reg->ctrl_reg = readl_relaxed(base + REG_MMU_CTRL_REG); reg->int_control0 = readl_relaxed(base + REG_MMU_INT_CONTROL0); reg->int_main_control = readl_relaxed(base + REG_MMU_INT_MAIN_CONTROL); reg->ivrp_paddr = readl_relaxed(base + REG_MMU_IVRP_PADDR); clk_disable_unprepare(data->bclk); return 0; } static int __maybe_unused mtk_iommu_resume(struct device *dev) { struct mtk_iommu_data *data = dev_get_drvdata(dev); struct mtk_iommu_suspend_reg *reg = &data->reg; void __iomem *base = data->base; int ret; ret = clk_prepare_enable(data->bclk); if (ret) { dev_err(data->dev, "Failed to enable clk(%d) in resume\n", ret); return ret; } writel_relaxed(reg->standard_axi_mode, base + REG_MMU_STANDARD_AXI_MODE); writel_relaxed(reg->dcm_dis, base + REG_MMU_DCM_DIS); writel_relaxed(reg->ctrl_reg, base + REG_MMU_CTRL_REG); writel_relaxed(reg->int_control0, base + REG_MMU_INT_CONTROL0); writel_relaxed(reg->int_main_control, base + REG_MMU_INT_MAIN_CONTROL); writel_relaxed(reg->ivrp_paddr, 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; } static const struct dev_pm_ops mtk_iommu_pm_ops = { SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(mtk_iommu_suspend, mtk_iommu_resume) }; static const struct of_device_id mtk_iommu_of_ids[] = { { .compatible = "mediatek,mt2712-m4u", .data = (void *)M4U_MT2712}, { .compatible = "mediatek,mt8173-m4u", .data = (void *)M4U_MT8173}, {} }; static struct platform_driver mtk_iommu_driver = { .probe = mtk_iommu_probe, .remove = mtk_iommu_remove, .driver = { .name = "mtk-iommu", .of_match_table = of_match_ptr(mtk_iommu_of_ids), .pm = &mtk_iommu_pm_ops, } }; static int __init mtk_iommu_init(void) { int ret; ret = platform_driver_register(&mtk_iommu_driver); if (ret != 0) pr_err("Failed to register MTK IOMMU driver\n"); return ret; } subsys_initcall(mtk_iommu_init)
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