| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (c) 2015-2016 MediaTek Inc. |
| * Author: Yong Wu <yong.wu@mediatek.com> |
| */ |
| #include <linux/bitfield.h> |
| #include <linux/bug.h> |
| #include <linux/clk.h> |
| #include <linux/component.h> |
| #include <linux/device.h> |
| #include <linux/dma-direct.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/mfd/syscon.h> |
| #include <linux/module.h> |
| #include <linux/of_address.h> |
| #include <linux/of_irq.h> |
| #include <linux/of_platform.h> |
| #include <linux/platform_device.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/regmap.h> |
| #include <linux/slab.h> |
| #include <linux/spinlock.h> |
| #include <linux/soc/mediatek/infracfg.h> |
| #include <asm/barrier.h> |
| #include <soc/mediatek/smi.h> |
| |
| #include "mtk_iommu.h" |
| |
| #define REG_MMU_PT_BASE_ADDR 0x000 |
| #define MMU_PT_ADDR_MASK GENMASK(31, 7) |
| |
| #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_GEN2 0x02c |
| #define REG_MMU_INV_SEL_GEN1 0x038 |
| #define F_INVLD_EN0 BIT(0) |
| #define F_INVLD_EN1 BIT(1) |
| |
| #define REG_MMU_MISC_CTRL 0x048 |
| #define F_MMU_IN_ORDER_WR_EN_MASK (BIT(1) | BIT(17)) |
| #define F_MMU_STANDARD_AXI_MODE_MASK (BIT(3) | BIT(19)) |
| |
| #define REG_MMU_DCM_DIS 0x050 |
| #define REG_MMU_WR_LEN_CTRL 0x054 |
| #define F_MMU_WR_THROT_DIS_MASK (BIT(5) | BIT(21)) |
| |
| #define REG_MMU_CTRL_REG 0x110 |
| #define F_MMU_TF_PROT_TO_PROGRAM_ADDR (2 << 4) |
| #define F_MMU_PREFETCH_RT_REPLACE_MOD BIT(4) |
| #define F_MMU_TF_PROT_TO_PROGRAM_ADDR_MT8173 (2 << 5) |
| |
| #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 |
| /* mmu0 | mmu1 */ |
| #define F_INT_TRANSLATION_FAULT (BIT(0) | BIT(7)) |
| #define F_INT_MAIN_MULTI_HIT_FAULT (BIT(1) | BIT(8)) |
| #define F_INT_INVALID_PA_FAULT (BIT(2) | BIT(9)) |
| #define F_INT_ENTRY_REPLACEMENT_FAULT (BIT(3) | BIT(10)) |
| #define F_INT_TLB_MISS_FAULT (BIT(4) | BIT(11)) |
| #define F_INT_MISS_TRANSACTION_FIFO_FAULT (BIT(5) | BIT(12)) |
| #define F_INT_PRETETCH_TRANSATION_FIFO_FAULT (BIT(6) | BIT(13)) |
| |
| #define REG_MMU_CPE_DONE 0x12C |
| |
| #define REG_MMU_FAULT_ST1 0x134 |
| #define F_REG_MMU0_FAULT_MASK GENMASK(6, 0) |
| #define F_REG_MMU1_FAULT_MASK GENMASK(13, 7) |
| |
| #define REG_MMU0_FAULT_VA 0x13c |
| #define F_MMU_INVAL_VA_31_12_MASK GENMASK(31, 12) |
| #define F_MMU_INVAL_VA_34_32_MASK GENMASK(11, 9) |
| #define F_MMU_INVAL_PA_34_32_MASK GENMASK(8, 6) |
| #define F_MMU_FAULT_VA_WRITE_BIT BIT(1) |
| #define F_MMU_FAULT_VA_LAYER_BIT BIT(0) |
| |
| #define REG_MMU0_INVLD_PA 0x140 |
| #define REG_MMU1_FAULT_VA 0x144 |
| #define REG_MMU1_INVLD_PA 0x148 |
| #define REG_MMU0_INT_ID 0x150 |
| #define REG_MMU1_INT_ID 0x154 |
| #define F_MMU_INT_ID_COMM_ID(a) (((a) >> 9) & 0x7) |
| #define F_MMU_INT_ID_SUB_COMM_ID(a) (((a) >> 7) & 0x3) |
| #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 256 |
| |
| #define HAS_4GB_MODE BIT(0) |
| /* HW will use the EMI clock if there isn't the "bclk". */ |
| #define HAS_BCLK BIT(1) |
| #define HAS_VLD_PA_RNG BIT(2) |
| #define RESET_AXI BIT(3) |
| #define OUT_ORDER_WR_EN BIT(4) |
| #define HAS_SUB_COMM BIT(5) |
| #define WR_THROT_EN BIT(6) |
| #define HAS_LEGACY_IVRP_PADDR BIT(7) |
| #define IOVA_34_EN BIT(8) |
| |
| #define MTK_IOMMU_HAS_FLAG(pdata, _x) \ |
| ((((pdata)->flags) & (_x)) == (_x)) |
| |
| struct mtk_iommu_domain { |
| struct io_pgtable_cfg cfg; |
| struct io_pgtable_ops *iop; |
| |
| struct mtk_iommu_data *data; |
| struct iommu_domain domain; |
| }; |
| |
| static const struct iommu_ops mtk_iommu_ops; |
| |
| static int mtk_iommu_hw_init(const struct mtk_iommu_data *data); |
| |
| #define MTK_IOMMU_TLB_ADDR(iova) ({ \ |
| dma_addr_t _addr = iova; \ |
| ((lower_32_bits(_addr) & GENMASK(31, 12)) | upper_32_bits(_addr));\ |
| }) |
| |
| /* |
| * In M4U 4GB mode, the physical address is remapped as below: |
| * |
| * CPU Physical address: |
| * ==================== |
| * |
| * 0 1G 2G 3G 4G 5G |
| * |---A---|---B---|---C---|---D---|---E---| |
| * +--I/O--+------------Memory-------------+ |
| * |
| * IOMMU output physical address: |
| * ============================= |
| * |
| * 4G 5G 6G 7G 8G |
| * |---E---|---B---|---C---|---D---| |
| * +------------Memory-------------+ |
| * |
| * The Region 'A'(I/O) can NOT be mapped by M4U; For Region 'B'/'C'/'D', the |
| * bit32 of the CPU physical address always is needed to set, and for Region |
| * 'E', the CPU physical address keep as is. |
| * Additionally, The iommu consumers always use the CPU phyiscal address. |
| */ |
| #define MTK_IOMMU_4GB_MODE_REMAP_BASE 0x140000000UL |
| |
| static LIST_HEAD(m4ulist); /* List all the M4U HWs */ |
| |
| #define for_each_m4u(data) list_for_each_entry(data, &m4ulist, list) |
| |
| struct mtk_iommu_iova_region { |
| dma_addr_t iova_base; |
| unsigned long long size; |
| }; |
| |
| static const struct mtk_iommu_iova_region single_domain[] = { |
| {.iova_base = 0, .size = SZ_4G}, |
| }; |
| |
| static const struct mtk_iommu_iova_region mt8192_multi_dom[] = { |
| { .iova_base = 0x0, .size = SZ_4G}, /* disp: 0 ~ 4G */ |
| #if IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT) |
| { .iova_base = SZ_4G, .size = SZ_4G}, /* vdec: 4G ~ 8G */ |
| { .iova_base = SZ_4G * 2, .size = SZ_4G}, /* CAM/MDP: 8G ~ 12G */ |
| { .iova_base = 0x240000000ULL, .size = 0x4000000}, /* CCU0 */ |
| { .iova_base = 0x244000000ULL, .size = 0x4000000}, /* CCU1 */ |
| #endif |
| }; |
| |
| /* |
| * 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(struct mtk_iommu_data *data) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&data->tlb_lock, flags); |
| writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0, |
| 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 */ |
| spin_unlock_irqrestore(&data->tlb_lock, flags); |
| } |
| |
| static void mtk_iommu_tlb_flush_range_sync(unsigned long iova, size_t size, |
| size_t granule, |
| struct mtk_iommu_data *data) |
| { |
| unsigned long flags; |
| int ret; |
| u32 tmp; |
| |
| for_each_m4u(data) { |
| if (pm_runtime_get_if_in_use(data->dev) <= 0) |
| continue; |
| |
| spin_lock_irqsave(&data->tlb_lock, flags); |
| writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0, |
| data->base + data->plat_data->inv_sel_reg); |
| |
| writel_relaxed(MTK_IOMMU_TLB_ADDR(iova), |
| data->base + REG_MMU_INVLD_START_A); |
| writel_relaxed(MTK_IOMMU_TLB_ADDR(iova + size - 1), |
| data->base + REG_MMU_INVLD_END_A); |
| writel_relaxed(F_MMU_INV_RANGE, |
| data->base + REG_MMU_INVALIDATE); |
| |
| /* tlb sync */ |
| ret = readl_poll_timeout_atomic(data->base + REG_MMU_CPE_DONE, |
| tmp, tmp != 0, 10, 1000); |
| |
| /* Clear the CPE status */ |
| writel_relaxed(0, data->base + REG_MMU_CPE_DONE); |
| spin_unlock_irqrestore(&data->tlb_lock, flags); |
| |
| if (ret) { |
| dev_warn(data->dev, |
| "Partial TLB flush timed out, falling back to full flush\n"); |
| mtk_iommu_tlb_flush_all(data); |
| } |
| |
| pm_runtime_put(data->dev); |
| } |
| } |
| |
| 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; |
| unsigned int fault_larb, fault_port, sub_comm = 0; |
| u32 int_state, regval, va34_32, pa34_32; |
| u64 fault_iova, fault_pa; |
| bool layer, write; |
| |
| /* Read error info from registers */ |
| int_state = readl_relaxed(data->base + REG_MMU_FAULT_ST1); |
| if (int_state & F_REG_MMU0_FAULT_MASK) { |
| regval = readl_relaxed(data->base + REG_MMU0_INT_ID); |
| fault_iova = readl_relaxed(data->base + REG_MMU0_FAULT_VA); |
| fault_pa = readl_relaxed(data->base + REG_MMU0_INVLD_PA); |
| } else { |
| regval = readl_relaxed(data->base + REG_MMU1_INT_ID); |
| fault_iova = readl_relaxed(data->base + REG_MMU1_FAULT_VA); |
| fault_pa = readl_relaxed(data->base + REG_MMU1_INVLD_PA); |
| } |
| layer = fault_iova & F_MMU_FAULT_VA_LAYER_BIT; |
| write = fault_iova & F_MMU_FAULT_VA_WRITE_BIT; |
| if (MTK_IOMMU_HAS_FLAG(data->plat_data, IOVA_34_EN)) { |
| va34_32 = FIELD_GET(F_MMU_INVAL_VA_34_32_MASK, fault_iova); |
| pa34_32 = FIELD_GET(F_MMU_INVAL_PA_34_32_MASK, fault_iova); |
| fault_iova = fault_iova & F_MMU_INVAL_VA_31_12_MASK; |
| fault_iova |= (u64)va34_32 << 32; |
| fault_pa |= (u64)pa34_32 << 32; |
| } |
| |
| fault_port = F_MMU_INT_ID_PORT_ID(regval); |
| if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_SUB_COMM)) { |
| fault_larb = F_MMU_INT_ID_COMM_ID(regval); |
| sub_comm = F_MMU_INT_ID_SUB_COMM_ID(regval); |
| } else { |
| fault_larb = F_MMU_INT_ID_LARB_ID(regval); |
| } |
| fault_larb = data->plat_data->larbid_remap[fault_larb][sub_comm]; |
| |
| 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%llx pa=0x%llx 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 int mtk_iommu_get_domain_id(struct device *dev, |
| const struct mtk_iommu_plat_data *plat_data) |
| { |
| const struct mtk_iommu_iova_region *rgn = plat_data->iova_region; |
| const struct bus_dma_region *dma_rgn = dev->dma_range_map; |
| int i, candidate = -1; |
| dma_addr_t dma_end; |
| |
| if (!dma_rgn || plat_data->iova_region_nr == 1) |
| return 0; |
| |
| dma_end = dma_rgn->dma_start + dma_rgn->size - 1; |
| for (i = 0; i < plat_data->iova_region_nr; i++, rgn++) { |
| /* Best fit. */ |
| if (dma_rgn->dma_start == rgn->iova_base && |
| dma_end == rgn->iova_base + rgn->size - 1) |
| return i; |
| /* ok if it is inside this region. */ |
| if (dma_rgn->dma_start >= rgn->iova_base && |
| dma_end < rgn->iova_base + rgn->size) |
| candidate = i; |
| } |
| |
| if (candidate >= 0) |
| return candidate; |
| dev_err(dev, "Can NOT find the iommu domain id(%pad 0x%llx).\n", |
| &dma_rgn->dma_start, dma_rgn->size); |
| return -EINVAL; |
| } |
| |
| static void mtk_iommu_config(struct mtk_iommu_data *data, struct device *dev, |
| bool enable, unsigned int domid) |
| { |
| struct mtk_smi_larb_iommu *larb_mmu; |
| unsigned int larbid, portid; |
| struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); |
| const struct mtk_iommu_iova_region *region; |
| 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->larb_imu[larbid]; |
| |
| region = data->plat_data->iova_region + domid; |
| larb_mmu->bank[portid] = upper_32_bits(region->iova_base); |
| |
| dev_dbg(dev, "%s iommu for larb(%s) port %d dom %d bank %d.\n", |
| enable ? "enable" : "disable", dev_name(larb_mmu->dev), |
| portid, domid, larb_mmu->bank[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, |
| unsigned int domid) |
| { |
| const struct mtk_iommu_iova_region *region; |
| |
| /* Use the exist domain as there is only one pgtable here. */ |
| if (data->m4u_dom) { |
| dom->iop = data->m4u_dom->iop; |
| dom->cfg = data->m4u_dom->cfg; |
| dom->domain.pgsize_bitmap = data->m4u_dom->cfg.pgsize_bitmap; |
| goto update_iova_region; |
| } |
| |
| dom->cfg = (struct io_pgtable_cfg) { |
| .quirks = IO_PGTABLE_QUIRK_ARM_NS | |
| IO_PGTABLE_QUIRK_NO_PERMS | |
| IO_PGTABLE_QUIRK_ARM_MTK_EXT, |
| .pgsize_bitmap = mtk_iommu_ops.pgsize_bitmap, |
| .ias = MTK_IOMMU_HAS_FLAG(data->plat_data, IOVA_34_EN) ? 34 : 32, |
| .iommu_dev = data->dev, |
| }; |
| |
| if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_4GB_MODE)) |
| dom->cfg.oas = data->enable_4GB ? 33 : 32; |
| else |
| dom->cfg.oas = 35; |
| |
| 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; |
| |
| update_iova_region: |
| /* Update the iova region for this domain */ |
| region = data->plat_data->iova_region + domid; |
| dom->domain.geometry.aperture_start = region->iova_base; |
| dom->domain.geometry.aperture_end = region->iova_base + region->size - 1; |
| dom->domain.geometry.force_aperture = true; |
| 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; |
| |
| return &dom->domain; |
| } |
| |
| static void mtk_iommu_domain_free(struct iommu_domain *domain) |
| { |
| kfree(to_mtk_domain(domain)); |
| } |
| |
| static int mtk_iommu_attach_device(struct iommu_domain *domain, |
| struct device *dev) |
| { |
| struct mtk_iommu_data *data = dev_iommu_priv_get(dev); |
| struct mtk_iommu_domain *dom = to_mtk_domain(domain); |
| struct device *m4udev = data->dev; |
| int ret, domid; |
| |
| domid = mtk_iommu_get_domain_id(dev, data->plat_data); |
| if (domid < 0) |
| return domid; |
| |
| if (!dom->data) { |
| if (mtk_iommu_domain_finalise(dom, data, domid)) |
| return -ENODEV; |
| dom->data = data; |
| } |
| |
| if (!data->m4u_dom) { /* Initialize the M4U HW */ |
| ret = pm_runtime_resume_and_get(m4udev); |
| if (ret < 0) |
| return ret; |
| |
| ret = mtk_iommu_hw_init(data); |
| if (ret) { |
| pm_runtime_put(m4udev); |
| return ret; |
| } |
| data->m4u_dom = dom; |
| writel(dom->cfg.arm_v7s_cfg.ttbr & MMU_PT_ADDR_MASK, |
| data->base + REG_MMU_PT_BASE_ADDR); |
| |
| pm_runtime_put(m4udev); |
| } |
| |
| mtk_iommu_config(data, dev, true, domid); |
| return 0; |
| } |
| |
| static void mtk_iommu_detach_device(struct iommu_domain *domain, |
| struct device *dev) |
| { |
| struct mtk_iommu_data *data = dev_iommu_priv_get(dev); |
| |
| mtk_iommu_config(data, dev, false, 0); |
| } |
| |
| static int mtk_iommu_map(struct iommu_domain *domain, unsigned long iova, |
| phys_addr_t paddr, size_t size, int prot, gfp_t gfp) |
| { |
| struct mtk_iommu_domain *dom = to_mtk_domain(domain); |
| |
| /* The "4GB mode" M4U physically can not use the lower remap of Dram. */ |
| if (dom->data->enable_4GB) |
| paddr |= BIT_ULL(32); |
| |
| /* Synchronize with the tlb_lock */ |
| return dom->iop->map(dom->iop, iova, paddr, size, prot, gfp); |
| } |
| |
| static size_t mtk_iommu_unmap(struct iommu_domain *domain, |
| unsigned long iova, size_t size, |
| struct iommu_iotlb_gather *gather) |
| { |
| struct mtk_iommu_domain *dom = to_mtk_domain(domain); |
| |
| iommu_iotlb_gather_add_range(gather, iova, size); |
| return dom->iop->unmap(dom->iop, iova, size, gather); |
| } |
| |
| static void mtk_iommu_flush_iotlb_all(struct iommu_domain *domain) |
| { |
| struct mtk_iommu_domain *dom = to_mtk_domain(domain); |
| |
| mtk_iommu_tlb_flush_all(dom->data); |
| } |
| |
| static void mtk_iommu_iotlb_sync(struct iommu_domain *domain, |
| struct iommu_iotlb_gather *gather) |
| { |
| struct mtk_iommu_domain *dom = to_mtk_domain(domain); |
| size_t length = gather->end - gather->start + 1; |
| |
| mtk_iommu_tlb_flush_range_sync(gather->start, length, gather->pgsize, |
| dom->data); |
| } |
| |
| static void mtk_iommu_sync_map(struct iommu_domain *domain, unsigned long iova, |
| size_t size) |
| { |
| struct mtk_iommu_domain *dom = to_mtk_domain(domain); |
| |
| mtk_iommu_tlb_flush_range_sync(iova, size, size, dom->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); |
| phys_addr_t pa; |
| |
| pa = dom->iop->iova_to_phys(dom->iop, iova); |
| if (IS_ENABLED(CONFIG_PHYS_ADDR_T_64BIT) && |
| dom->data->enable_4GB && |
| pa >= MTK_IOMMU_4GB_MODE_REMAP_BASE) |
| pa &= ~BIT_ULL(32); |
| |
| return pa; |
| } |
| |
| static struct iommu_device *mtk_iommu_probe_device(struct device *dev) |
| { |
| struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); |
| struct mtk_iommu_data *data; |
| struct device_link *link; |
| struct device *larbdev; |
| unsigned int larbid, larbidx, i; |
| |
| if (!fwspec || fwspec->ops != &mtk_iommu_ops) |
| return ERR_PTR(-ENODEV); /* Not a iommu client device */ |
| |
| data = dev_iommu_priv_get(dev); |
| |
| /* |
| * Link the consumer device with the smi-larb device(supplier). |
| * The device that connects with each a larb is a independent HW. |
| * All the ports in each a device should be in the same larbs. |
| */ |
| larbid = MTK_M4U_TO_LARB(fwspec->ids[0]); |
| for (i = 1; i < fwspec->num_ids; i++) { |
| larbidx = MTK_M4U_TO_LARB(fwspec->ids[i]); |
| if (larbid != larbidx) { |
| dev_err(dev, "Can only use one larb. Fail@larb%d-%d.\n", |
| larbid, larbidx); |
| return ERR_PTR(-EINVAL); |
| } |
| } |
| larbdev = data->larb_imu[larbid].dev; |
| link = device_link_add(dev, larbdev, |
| DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS); |
| if (!link) |
| dev_err(dev, "Unable to link %s\n", dev_name(larbdev)); |
| return &data->iommu; |
| } |
| |
| static void mtk_iommu_release_device(struct device *dev) |
| { |
| struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); |
| struct mtk_iommu_data *data; |
| struct device *larbdev; |
| unsigned int larbid; |
| |
| if (!fwspec || fwspec->ops != &mtk_iommu_ops) |
| return; |
| |
| data = dev_iommu_priv_get(dev); |
| larbid = MTK_M4U_TO_LARB(fwspec->ids[0]); |
| larbdev = data->larb_imu[larbid].dev; |
| device_link_remove(dev, larbdev); |
| |
| 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(); |
| struct iommu_group *group; |
| int domid; |
| |
| if (!data) |
| return ERR_PTR(-ENODEV); |
| |
| domid = mtk_iommu_get_domain_id(dev, data->plat_data); |
| if (domid < 0) |
| return ERR_PTR(domid); |
| |
| group = data->m4u_group[domid]; |
| if (!group) { |
| group = iommu_group_alloc(); |
| if (!IS_ERR(group)) |
| data->m4u_group[domid] = group; |
| } else { |
| iommu_group_ref_get(group); |
| } |
| return 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_priv_get(dev)) { |
| /* Get the m4u device */ |
| m4updev = of_find_device_by_node(args->np); |
| if (WARN_ON(!m4updev)) |
| return -EINVAL; |
| |
| dev_iommu_priv_set(dev, platform_get_drvdata(m4updev)); |
| } |
| |
| return iommu_fwspec_add_ids(dev, args->args, 1); |
| } |
| |
| static void mtk_iommu_get_resv_regions(struct device *dev, |
| struct list_head *head) |
| { |
| struct mtk_iommu_data *data = dev_iommu_priv_get(dev); |
| unsigned int domid = mtk_iommu_get_domain_id(dev, data->plat_data), i; |
| const struct mtk_iommu_iova_region *resv, *curdom; |
| struct iommu_resv_region *region; |
| int prot = IOMMU_WRITE | IOMMU_READ; |
| |
| if ((int)domid < 0) |
| return; |
| curdom = data->plat_data->iova_region + domid; |
| for (i = 0; i < data->plat_data->iova_region_nr; i++) { |
| resv = data->plat_data->iova_region + i; |
| |
| /* Only reserve when the region is inside the current domain */ |
| if (resv->iova_base <= curdom->iova_base || |
| resv->iova_base + resv->size >= curdom->iova_base + curdom->size) |
| continue; |
| |
| region = iommu_alloc_resv_region(resv->iova_base, resv->size, |
| prot, IOMMU_RESV_RESERVED); |
| if (!region) |
| return; |
| |
| list_add_tail(®ion->list, head); |
| } |
| } |
| |
| static const struct iommu_ops mtk_iommu_ops = { |
| .domain_alloc = mtk_iommu_domain_alloc, |
| .probe_device = mtk_iommu_probe_device, |
| .release_device = mtk_iommu_release_device, |
| .device_group = mtk_iommu_device_group, |
| .of_xlate = mtk_iommu_of_xlate, |
| .get_resv_regions = mtk_iommu_get_resv_regions, |
| .put_resv_regions = generic_iommu_put_resv_regions, |
| .pgsize_bitmap = SZ_4K | SZ_64K | SZ_1M | SZ_16M, |
| .owner = THIS_MODULE, |
| .default_domain_ops = &(const struct iommu_domain_ops) { |
| .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_flush_iotlb_all, |
| .iotlb_sync = mtk_iommu_iotlb_sync, |
| .iotlb_sync_map = mtk_iommu_sync_map, |
| .iova_to_phys = mtk_iommu_iova_to_phys, |
| .free = mtk_iommu_domain_free, |
| } |
| }; |
| |
| static int mtk_iommu_hw_init(const struct mtk_iommu_data *data) |
| { |
| u32 regval; |
| |
| if (data->plat_data->m4u_plat == M4U_MT8173) { |
| regval = F_MMU_PREFETCH_RT_REPLACE_MOD | |
| F_MMU_TF_PROT_TO_PROGRAM_ADDR_MT8173; |
| } else { |
| regval = readl_relaxed(data->base + REG_MMU_CTRL_REG); |
| regval |= F_MMU_TF_PROT_TO_PROGRAM_ADDR; |
| } |
| 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 (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_LEGACY_IVRP_PADDR)) |
| 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 && |
| MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_VLD_PA_RNG)) { |
| /* |
| * 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); |
| if (MTK_IOMMU_HAS_FLAG(data->plat_data, WR_THROT_EN)) { |
| /* write command throttling mode */ |
| regval = readl_relaxed(data->base + REG_MMU_WR_LEN_CTRL); |
| regval &= ~F_MMU_WR_THROT_DIS_MASK; |
| writel_relaxed(regval, data->base + REG_MMU_WR_LEN_CTRL); |
| } |
| |
| if (MTK_IOMMU_HAS_FLAG(data->plat_data, RESET_AXI)) { |
| /* The register is called STANDARD_AXI_MODE in this case */ |
| regval = 0; |
| } else { |
| regval = readl_relaxed(data->base + REG_MMU_MISC_CTRL); |
| regval &= ~F_MMU_STANDARD_AXI_MODE_MASK; |
| if (MTK_IOMMU_HAS_FLAG(data->plat_data, OUT_ORDER_WR_EN)) |
| regval &= ~F_MMU_IN_ORDER_WR_EN_MASK; |
| } |
| writel_relaxed(regval, data->base + REG_MMU_MISC_CTRL); |
| |
| 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); |
| 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 device_node *larbnode, *smicomm_node; |
| struct platform_device *plarbdev; |
| struct device_link *link; |
| struct resource *res; |
| resource_size_t ioaddr; |
| struct component_match *match = NULL; |
| struct regmap *infracfg; |
| void *protect; |
| int i, larb_nr, ret; |
| u32 val; |
| char *p; |
| |
| data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); |
| if (!data) |
| return -ENOMEM; |
| data->dev = dev; |
| data->plat_data = 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); |
| |
| if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_4GB_MODE)) { |
| switch (data->plat_data->m4u_plat) { |
| case M4U_MT2712: |
| p = "mediatek,mt2712-infracfg"; |
| break; |
| case M4U_MT8173: |
| p = "mediatek,mt8173-infracfg"; |
| break; |
| default: |
| p = NULL; |
| } |
| |
| infracfg = syscon_regmap_lookup_by_compatible(p); |
| |
| if (IS_ERR(infracfg)) |
| return PTR_ERR(infracfg); |
| |
| ret = regmap_read(infracfg, REG_INFRA_MISC, &val); |
| if (ret) |
| return ret; |
| data->enable_4GB = !!(val & F_DDR_4GB_SUPPORT_EN); |
| } |
| |
| 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; |
| |
| if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_BCLK)) { |
| 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; |
| |
| for (i = 0; i < larb_nr; i++) { |
| u32 id; |
| |
| larbnode = of_parse_phandle(dev->of_node, "mediatek,larbs", i); |
| if (!larbnode) |
| return -EINVAL; |
| |
| if (!of_device_is_available(larbnode)) { |
| of_node_put(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) { |
| of_node_put(larbnode); |
| return -ENODEV; |
| } |
| if (!plarbdev->dev.driver) { |
| of_node_put(larbnode); |
| return -EPROBE_DEFER; |
| } |
| data->larb_imu[id].dev = &plarbdev->dev; |
| |
| component_match_add_release(dev, &match, component_release_of, |
| component_compare_of, larbnode); |
| } |
| |
| /* Get smi-common dev from the last larb. */ |
| smicomm_node = of_parse_phandle(larbnode, "mediatek,smi", 0); |
| if (!smicomm_node) |
| return -EINVAL; |
| |
| plarbdev = of_find_device_by_node(smicomm_node); |
| of_node_put(smicomm_node); |
| data->smicomm_dev = &plarbdev->dev; |
| |
| pm_runtime_enable(dev); |
| |
| link = device_link_add(data->smicomm_dev, dev, |
| DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME); |
| if (!link) { |
| dev_err(dev, "Unable to link %s.\n", dev_name(data->smicomm_dev)); |
| ret = -EINVAL; |
| goto out_runtime_disable; |
| } |
| |
| platform_set_drvdata(pdev, data); |
| |
| ret = iommu_device_sysfs_add(&data->iommu, dev, NULL, |
| "mtk-iommu.%pa", &ioaddr); |
| if (ret) |
| goto out_link_remove; |
| |
| ret = iommu_device_register(&data->iommu, &mtk_iommu_ops, dev); |
| if (ret) |
| goto out_sysfs_remove; |
| |
| spin_lock_init(&data->tlb_lock); |
| list_add_tail(&data->list, &m4ulist); |
| |
| if (!iommu_present(&platform_bus_type)) { |
| ret = bus_set_iommu(&platform_bus_type, &mtk_iommu_ops); |
| if (ret) |
| goto out_list_del; |
| } |
| |
| ret = component_master_add_with_match(dev, &mtk_iommu_com_ops, match); |
| if (ret) |
| goto out_bus_set_null; |
| return ret; |
| |
| out_bus_set_null: |
| bus_set_iommu(&platform_bus_type, NULL); |
| out_list_del: |
| list_del(&data->list); |
| iommu_device_unregister(&data->iommu); |
| out_sysfs_remove: |
| iommu_device_sysfs_remove(&data->iommu); |
| out_link_remove: |
| device_link_remove(data->smicomm_dev, dev); |
| out_runtime_disable: |
| pm_runtime_disable(dev); |
| return ret; |
| } |
| |
| 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); |
| device_link_remove(data->smicomm_dev, &pdev->dev); |
| pm_runtime_disable(&pdev->dev); |
| 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_runtime_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->wr_len_ctrl = readl_relaxed(base + REG_MMU_WR_LEN_CTRL); |
| reg->misc_ctrl = readl_relaxed(base + REG_MMU_MISC_CTRL); |
| 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); |
| reg->vld_pa_rng = readl_relaxed(base + REG_MMU_VLD_PA_RNG); |
| clk_disable_unprepare(data->bclk); |
| return 0; |
| } |
| |
| static int __maybe_unused mtk_iommu_runtime_resume(struct device *dev) |
| { |
| struct mtk_iommu_data *data = dev_get_drvdata(dev); |
| struct mtk_iommu_suspend_reg *reg = &data->reg; |
| struct mtk_iommu_domain *m4u_dom = data->m4u_dom; |
| 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; |
| } |
| |
| /* |
| * Uppon first resume, only enable the clk and return, since the values of the |
| * registers are not yet set. |
| */ |
| if (!m4u_dom) |
| return 0; |
| |
| writel_relaxed(reg->wr_len_ctrl, base + REG_MMU_WR_LEN_CTRL); |
| writel_relaxed(reg->misc_ctrl, base + REG_MMU_MISC_CTRL); |
| 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); |
| writel_relaxed(reg->vld_pa_rng, base + REG_MMU_VLD_PA_RNG); |
| writel(m4u_dom->cfg.arm_v7s_cfg.ttbr & MMU_PT_ADDR_MASK, base + REG_MMU_PT_BASE_ADDR); |
| |
| /* |
| * Users may allocate dma buffer before they call pm_runtime_get, |
| * in which case it will lack the necessary tlb flush. |
| * Thus, make sure to update the tlb after each PM resume. |
| */ |
| mtk_iommu_tlb_flush_all(data); |
| return 0; |
| } |
| |
| static const struct dev_pm_ops mtk_iommu_pm_ops = { |
| SET_RUNTIME_PM_OPS(mtk_iommu_runtime_suspend, mtk_iommu_runtime_resume, NULL) |
| SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, |
| pm_runtime_force_resume) |
| }; |
| |
| static const struct mtk_iommu_plat_data mt2712_data = { |
| .m4u_plat = M4U_MT2712, |
| .flags = HAS_4GB_MODE | HAS_BCLK | HAS_VLD_PA_RNG, |
| .inv_sel_reg = REG_MMU_INV_SEL_GEN1, |
| .iova_region = single_domain, |
| .iova_region_nr = ARRAY_SIZE(single_domain), |
| .larbid_remap = {{0}, {1}, {2}, {3}, {4}, {5}, {6}, {7}}, |
| }; |
| |
| static const struct mtk_iommu_plat_data mt6779_data = { |
| .m4u_plat = M4U_MT6779, |
| .flags = HAS_SUB_COMM | OUT_ORDER_WR_EN | WR_THROT_EN, |
| .inv_sel_reg = REG_MMU_INV_SEL_GEN2, |
| .iova_region = single_domain, |
| .iova_region_nr = ARRAY_SIZE(single_domain), |
| .larbid_remap = {{0}, {1}, {2}, {3}, {5}, {7, 8}, {10}, {9}}, |
| }; |
| |
| static const struct mtk_iommu_plat_data mt8167_data = { |
| .m4u_plat = M4U_MT8167, |
| .flags = RESET_AXI | HAS_LEGACY_IVRP_PADDR, |
| .inv_sel_reg = REG_MMU_INV_SEL_GEN1, |
| .iova_region = single_domain, |
| .iova_region_nr = ARRAY_SIZE(single_domain), |
| .larbid_remap = {{0}, {1}, {2}}, /* Linear mapping. */ |
| }; |
| |
| static const struct mtk_iommu_plat_data mt8173_data = { |
| .m4u_plat = M4U_MT8173, |
| .flags = HAS_4GB_MODE | HAS_BCLK | RESET_AXI | |
| HAS_LEGACY_IVRP_PADDR, |
| .inv_sel_reg = REG_MMU_INV_SEL_GEN1, |
| .iova_region = single_domain, |
| .iova_region_nr = ARRAY_SIZE(single_domain), |
| .larbid_remap = {{0}, {1}, {2}, {3}, {4}, {5}}, /* Linear mapping. */ |
| }; |
| |
| static const struct mtk_iommu_plat_data mt8183_data = { |
| .m4u_plat = M4U_MT8183, |
| .flags = RESET_AXI, |
| .inv_sel_reg = REG_MMU_INV_SEL_GEN1, |
| .iova_region = single_domain, |
| .iova_region_nr = ARRAY_SIZE(single_domain), |
| .larbid_remap = {{0}, {4}, {5}, {6}, {7}, {2}, {3}, {1}}, |
| }; |
| |
| static const struct mtk_iommu_plat_data mt8192_data = { |
| .m4u_plat = M4U_MT8192, |
| .flags = HAS_BCLK | HAS_SUB_COMM | OUT_ORDER_WR_EN | |
| WR_THROT_EN | IOVA_34_EN, |
| .inv_sel_reg = REG_MMU_INV_SEL_GEN2, |
| .iova_region = mt8192_multi_dom, |
| .iova_region_nr = ARRAY_SIZE(mt8192_multi_dom), |
| .larbid_remap = {{0}, {1}, {4, 5}, {7}, {2}, {9, 11, 19, 20}, |
| {0, 14, 16}, {0, 13, 18, 17}}, |
| }; |
| |
| 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,mt8167-m4u", .data = &mt8167_data}, |
| { .compatible = "mediatek,mt8173-m4u", .data = &mt8173_data}, |
| { .compatible = "mediatek,mt8183-m4u", .data = &mt8183_data}, |
| { .compatible = "mediatek,mt8192-m4u", .data = &mt8192_data}, |
| {} |
| }; |
| |
| static struct platform_driver mtk_iommu_driver = { |
| .probe = mtk_iommu_probe, |
| .remove = mtk_iommu_remove, |
| .driver = { |
| .name = "mtk-iommu", |
| .of_match_table = mtk_iommu_of_ids, |
| .pm = &mtk_iommu_pm_ops, |
| } |
| }; |
| module_platform_driver(mtk_iommu_driver); |
| |
| MODULE_DESCRIPTION("IOMMU API for MediaTek M4U implementations"); |
| MODULE_LICENSE("GPL v2"); |