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-rw-r--r--drivers/iommu/mtk_iommu.c1586
1 files changed, 1586 insertions, 0 deletions
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
new file mode 100644
index 000000000..0ba2a63a9
--- /dev/null
+++ b/drivers/iommu/mtk_iommu.c
@@ -0,0 +1,1586 @@
+// 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/io-pgtable.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/pci.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 <dt-bindings/memory/mtk-memory-port.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_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 F_MMU_DCM BIT(8)
+
+#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_COMM_ID_EXT(a) (((a) >> 10) & 0x7)
+#define F_MMU_INT_ID_SUB_COMM_ID_EXT(a) (((a) >> 7) & 0x7)
+#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 MTK_IOMMU_BANK_SZ 0x1000
+
+#define PERICFG_IOMMU_1 0x714
+
+#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_2BITS BIT(5)
+#define HAS_SUB_COMM_3BITS BIT(6)
+#define WR_THROT_EN BIT(7)
+#define HAS_LEGACY_IVRP_PADDR BIT(8)
+#define IOVA_34_EN BIT(9)
+#define SHARE_PGTABLE BIT(10) /* 2 HW share pgtable */
+#define DCM_DISABLE BIT(11)
+#define STD_AXI_MODE BIT(12) /* For non MM iommu */
+/* 2 bits: iommu type */
+#define MTK_IOMMU_TYPE_MM (0x0 << 13)
+#define MTK_IOMMU_TYPE_INFRA (0x1 << 13)
+#define MTK_IOMMU_TYPE_MASK (0x3 << 13)
+/* PM and clock always on. e.g. infra iommu */
+#define PM_CLK_AO BIT(15)
+#define IFA_IOMMU_PCIE_SUPPORT BIT(16)
+#define PGTABLE_PA_35_EN BIT(17)
+#define TF_PORT_TO_ADDR_MT8173 BIT(18)
+
+#define MTK_IOMMU_HAS_FLAG_MASK(pdata, _x, mask) \
+ ((((pdata)->flags) & (mask)) == (_x))
+
+#define MTK_IOMMU_HAS_FLAG(pdata, _x) MTK_IOMMU_HAS_FLAG_MASK(pdata, _x, _x)
+#define MTK_IOMMU_IS_TYPE(pdata, _x) MTK_IOMMU_HAS_FLAG_MASK(pdata, _x,\
+ MTK_IOMMU_TYPE_MASK)
+
+#define MTK_INVALID_LARBID MTK_LARB_NR_MAX
+
+#define MTK_LARB_COM_MAX 8
+#define MTK_LARB_SUBCOM_MAX 8
+
+#define MTK_IOMMU_GROUP_MAX 8
+#define MTK_IOMMU_BANK_MAX 5
+
+enum mtk_iommu_plat {
+ M4U_MT2712,
+ M4U_MT6779,
+ M4U_MT6795,
+ M4U_MT8167,
+ M4U_MT8173,
+ M4U_MT8183,
+ M4U_MT8186,
+ M4U_MT8192,
+ M4U_MT8195,
+};
+
+struct mtk_iommu_iova_region {
+ dma_addr_t iova_base;
+ unsigned long long size;
+};
+
+struct mtk_iommu_suspend_reg {
+ u32 misc_ctrl;
+ u32 dcm_dis;
+ u32 ctrl_reg;
+ u32 vld_pa_rng;
+ u32 wr_len_ctrl;
+
+ u32 int_control[MTK_IOMMU_BANK_MAX];
+ u32 int_main_control[MTK_IOMMU_BANK_MAX];
+ u32 ivrp_paddr[MTK_IOMMU_BANK_MAX];
+};
+
+struct mtk_iommu_plat_data {
+ enum mtk_iommu_plat m4u_plat;
+ u32 flags;
+ u32 inv_sel_reg;
+
+ char *pericfg_comp_str;
+ struct list_head *hw_list;
+ unsigned int iova_region_nr;
+ const struct mtk_iommu_iova_region *iova_region;
+
+ u8 banks_num;
+ bool banks_enable[MTK_IOMMU_BANK_MAX];
+ unsigned int banks_portmsk[MTK_IOMMU_BANK_MAX];
+ unsigned char larbid_remap[MTK_LARB_COM_MAX][MTK_LARB_SUBCOM_MAX];
+};
+
+struct mtk_iommu_bank_data {
+ void __iomem *base;
+ int irq;
+ u8 id;
+ struct device *parent_dev;
+ struct mtk_iommu_data *parent_data;
+ spinlock_t tlb_lock; /* lock for tlb range flush */
+ struct mtk_iommu_domain *m4u_dom; /* Each bank has a domain */
+};
+
+struct mtk_iommu_data {
+ struct device *dev;
+ struct clk *bclk;
+ phys_addr_t protect_base; /* protect memory base */
+ struct mtk_iommu_suspend_reg reg;
+ struct iommu_group *m4u_group[MTK_IOMMU_GROUP_MAX];
+ bool enable_4GB;
+
+ struct iommu_device iommu;
+ const struct mtk_iommu_plat_data *plat_data;
+ struct device *smicomm_dev;
+
+ struct mtk_iommu_bank_data *bank;
+ struct mtk_iommu_domain *share_dom;
+
+ struct regmap *pericfg;
+ struct mutex mutex; /* Protect m4u_group/m4u_dom above */
+
+ /*
+ * In the sharing pgtable case, list data->list to the global list like m4ulist.
+ * In the non-sharing pgtable case, list data->list to the itself hw_list_head.
+ */
+ struct list_head *hw_list;
+ struct list_head hw_list_head;
+ struct list_head list;
+ struct mtk_smi_larb_iommu larb_imu[MTK_LARB_NR_MAX];
+};
+
+struct mtk_iommu_domain {
+ struct io_pgtable_cfg cfg;
+ struct io_pgtable_ops *iop;
+
+ struct mtk_iommu_bank_data *bank;
+ struct iommu_domain domain;
+
+ struct mutex mutex; /* Protect "data" in this structure */
+};
+
+static int mtk_iommu_bind(struct device *dev)
+{
+ struct mtk_iommu_data *data = dev_get_drvdata(dev);
+
+ return component_bind_all(dev, &data->larb_imu);
+}
+
+static void mtk_iommu_unbind(struct device *dev)
+{
+ struct mtk_iommu_data *data = dev_get_drvdata(dev);
+
+ component_unbind_all(dev, &data->larb_imu);
+}
+
+static const struct iommu_ops mtk_iommu_ops;
+
+static int mtk_iommu_hw_init(const struct mtk_iommu_data *data, unsigned int bankid);
+
+#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, head) list_for_each_entry(data, head, list)
+
+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}, /* 0 ~ 4G */
+ #if IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT)
+ { .iova_base = SZ_4G, .size = SZ_4G}, /* 4G ~ 8G */
+ { .iova_base = SZ_4G * 2, .size = SZ_4G}, /* 8G ~ 12G */
+ { .iova_base = SZ_4G * 3, .size = SZ_4G}, /* 12G ~ 16G */
+
+ { .iova_base = 0x240000000ULL, .size = 0x4000000}, /* CCU0 */
+ { .iova_base = 0x244000000ULL, .size = 0x4000000}, /* CCU1 */
+ #endif
+};
+
+/* If 2 M4U share a domain(use the same hwlist), Put the corresponding info in first data.*/
+static struct mtk_iommu_data *mtk_iommu_get_frst_data(struct list_head *hwlist)
+{
+ return list_first_entry(hwlist, struct mtk_iommu_data, list);
+}
+
+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)
+{
+ /* Tlb flush all always is in bank0. */
+ struct mtk_iommu_bank_data *bank = &data->bank[0];
+ void __iomem *base = bank->base;
+ unsigned long flags;
+
+ spin_lock_irqsave(&bank->tlb_lock, flags);
+ writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0, base + data->plat_data->inv_sel_reg);
+ writel_relaxed(F_ALL_INVLD, base + REG_MMU_INVALIDATE);
+ wmb(); /* Make sure the tlb flush all done */
+ spin_unlock_irqrestore(&bank->tlb_lock, flags);
+}
+
+static void mtk_iommu_tlb_flush_range_sync(unsigned long iova, size_t size,
+ struct mtk_iommu_bank_data *bank)
+{
+ struct list_head *head = bank->parent_data->hw_list;
+ struct mtk_iommu_bank_data *curbank;
+ struct mtk_iommu_data *data;
+ bool check_pm_status;
+ unsigned long flags;
+ void __iomem *base;
+ int ret;
+ u32 tmp;
+
+ for_each_m4u(data, head) {
+ /*
+ * To avoid resume the iommu device frequently when the iommu device
+ * is not active, it doesn't always call pm_runtime_get here, then tlb
+ * flush depends on the tlb flush all in the runtime resume.
+ *
+ * There are 2 special cases:
+ *
+ * Case1: The iommu dev doesn't have power domain but has bclk. This case
+ * should also avoid the tlb flush while the dev is not active to mute
+ * the tlb timeout log. like mt8173.
+ *
+ * Case2: The power/clock of infra iommu is always on, and it doesn't
+ * have the device link with the master devices. This case should avoid
+ * the PM status check.
+ */
+ check_pm_status = !MTK_IOMMU_HAS_FLAG(data->plat_data, PM_CLK_AO);
+
+ if (check_pm_status) {
+ if (pm_runtime_get_if_in_use(data->dev) <= 0)
+ continue;
+ }
+
+ curbank = &data->bank[bank->id];
+ base = curbank->base;
+
+ spin_lock_irqsave(&curbank->tlb_lock, flags);
+ writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0,
+ base + data->plat_data->inv_sel_reg);
+
+ writel_relaxed(MTK_IOMMU_TLB_ADDR(iova), base + REG_MMU_INVLD_START_A);
+ writel_relaxed(MTK_IOMMU_TLB_ADDR(iova + size - 1),
+ base + REG_MMU_INVLD_END_A);
+ writel_relaxed(F_MMU_INV_RANGE, base + REG_MMU_INVALIDATE);
+
+ /* tlb sync */
+ ret = readl_poll_timeout_atomic(base + REG_MMU_CPE_DONE,
+ tmp, tmp != 0, 10, 1000);
+
+ /* Clear the CPE status */
+ writel_relaxed(0, base + REG_MMU_CPE_DONE);
+ spin_unlock_irqrestore(&curbank->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);
+ }
+
+ if (check_pm_status)
+ pm_runtime_put(data->dev);
+ }
+}
+
+static irqreturn_t mtk_iommu_isr(int irq, void *dev_id)
+{
+ struct mtk_iommu_bank_data *bank = dev_id;
+ struct mtk_iommu_data *data = bank->parent_data;
+ struct mtk_iommu_domain *dom = bank->m4u_dom;
+ unsigned int fault_larb = MTK_INVALID_LARBID, fault_port = 0, sub_comm = 0;
+ u32 int_state, regval, va34_32, pa34_32;
+ const struct mtk_iommu_plat_data *plat_data = data->plat_data;
+ void __iomem *base = bank->base;
+ u64 fault_iova, fault_pa;
+ bool layer, write;
+
+ /* Read error info from registers */
+ int_state = readl_relaxed(base + REG_MMU_FAULT_ST1);
+ if (int_state & F_REG_MMU0_FAULT_MASK) {
+ regval = readl_relaxed(base + REG_MMU0_INT_ID);
+ fault_iova = readl_relaxed(base + REG_MMU0_FAULT_VA);
+ fault_pa = readl_relaxed(base + REG_MMU0_INVLD_PA);
+ } else {
+ regval = readl_relaxed(base + REG_MMU1_INT_ID);
+ fault_iova = readl_relaxed(base + REG_MMU1_FAULT_VA);
+ fault_pa = readl_relaxed(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(plat_data, IOVA_34_EN)) {
+ va34_32 = FIELD_GET(F_MMU_INVAL_VA_34_32_MASK, fault_iova);
+ fault_iova = fault_iova & F_MMU_INVAL_VA_31_12_MASK;
+ fault_iova |= (u64)va34_32 << 32;
+ }
+ pa34_32 = FIELD_GET(F_MMU_INVAL_PA_34_32_MASK, fault_iova);
+ fault_pa |= (u64)pa34_32 << 32;
+
+ if (MTK_IOMMU_IS_TYPE(plat_data, MTK_IOMMU_TYPE_MM)) {
+ fault_port = F_MMU_INT_ID_PORT_ID(regval);
+ if (MTK_IOMMU_HAS_FLAG(plat_data, HAS_SUB_COMM_2BITS)) {
+ fault_larb = F_MMU_INT_ID_COMM_ID(regval);
+ sub_comm = F_MMU_INT_ID_SUB_COMM_ID(regval);
+ } else if (MTK_IOMMU_HAS_FLAG(plat_data, HAS_SUB_COMM_3BITS)) {
+ fault_larb = F_MMU_INT_ID_COMM_ID_EXT(regval);
+ sub_comm = F_MMU_INT_ID_SUB_COMM_ID_EXT(regval);
+ } else {
+ fault_larb = F_MMU_INT_ID_LARB_ID(regval);
+ }
+ fault_larb = data->plat_data->larbid_remap[fault_larb][sub_comm];
+ }
+
+ if (!dom || report_iommu_fault(&dom->domain, bank->parent_dev, fault_iova,
+ write ? IOMMU_FAULT_WRITE : IOMMU_FAULT_READ)) {
+ dev_err_ratelimited(
+ bank->parent_dev,
+ "fault type=0x%x iova=0x%llx pa=0x%llx master=0x%x(larb=%d port=%d) layer=%d %s\n",
+ int_state, fault_iova, fault_pa, regval, fault_larb, fault_port,
+ layer, write ? "write" : "read");
+ }
+
+ /* Interrupt clear */
+ regval = readl_relaxed(base + REG_MMU_INT_CONTROL0);
+ regval |= F_INT_CLR_BIT;
+ writel_relaxed(regval, base + REG_MMU_INT_CONTROL0);
+
+ mtk_iommu_tlb_flush_all(data);
+
+ return IRQ_HANDLED;
+}
+
+static unsigned int mtk_iommu_get_bank_id(struct device *dev,
+ const struct mtk_iommu_plat_data *plat_data)
+{
+ struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
+ unsigned int i, portmsk = 0, bankid = 0;
+
+ if (plat_data->banks_num == 1)
+ return bankid;
+
+ for (i = 0; i < fwspec->num_ids; i++)
+ portmsk |= BIT(MTK_M4U_TO_PORT(fwspec->ids[i]));
+
+ for (i = 0; i < plat_data->banks_num && i < MTK_IOMMU_BANK_MAX; i++) {
+ if (!plat_data->banks_enable[i])
+ continue;
+
+ if (portmsk & plat_data->banks_portmsk[i]) {
+ bankid = i;
+ break;
+ }
+ }
+ return bankid; /* default is 0 */
+}
+
+static int mtk_iommu_get_iova_region_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 int mtk_iommu_config(struct mtk_iommu_data *data, struct device *dev,
+ bool enable, unsigned int regionid)
+{
+ 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;
+ u32 peri_mmuen, peri_mmuen_msk;
+ int i, ret = 0;
+
+ for (i = 0; i < fwspec->num_ids; ++i) {
+ larbid = MTK_M4U_TO_LARB(fwspec->ids[i]);
+ portid = MTK_M4U_TO_PORT(fwspec->ids[i]);
+
+ if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) {
+ larb_mmu = &data->larb_imu[larbid];
+
+ region = data->plat_data->iova_region + regionid;
+ larb_mmu->bank[portid] = upper_32_bits(region->iova_base);
+
+ dev_dbg(dev, "%s iommu for larb(%s) port %d region %d rgn-bank %d.\n",
+ enable ? "enable" : "disable", dev_name(larb_mmu->dev),
+ portid, regionid, larb_mmu->bank[portid]);
+
+ if (enable)
+ larb_mmu->mmu |= MTK_SMI_MMU_EN(portid);
+ else
+ larb_mmu->mmu &= ~MTK_SMI_MMU_EN(portid);
+ } else if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_INFRA)) {
+ peri_mmuen_msk = BIT(portid);
+ /* PCI dev has only one output id, enable the next writing bit for PCIe */
+ if (dev_is_pci(dev))
+ peri_mmuen_msk |= BIT(portid + 1);
+
+ peri_mmuen = enable ? peri_mmuen_msk : 0;
+ ret = regmap_update_bits(data->pericfg, PERICFG_IOMMU_1,
+ peri_mmuen_msk, peri_mmuen);
+ if (ret)
+ dev_err(dev, "%s iommu(%s) inframaster 0x%x fail(%d).\n",
+ enable ? "enable" : "disable",
+ dev_name(data->dev), peri_mmuen_msk, ret);
+ }
+ }
+ return ret;
+}
+
+static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom,
+ struct mtk_iommu_data *data,
+ unsigned int region_id)
+{
+ struct mtk_iommu_domain *share_dom = data->share_dom;
+ const struct mtk_iommu_iova_region *region;
+
+ /* Share pgtable when 2 MM IOMMU share the pgtable or one IOMMU use multiple iova ranges */
+ if (share_dom) {
+ dom->iop = share_dom->iop;
+ dom->cfg = share_dom->cfg;
+ dom->domain.pgsize_bitmap = share_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, PGTABLE_PA_35_EN))
+ dom->cfg.quirks |= IO_PGTABLE_QUIRK_ARM_MTK_TTBR_EXT;
+
+ 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;
+
+ data->share_dom = dom;
+
+update_iova_region:
+ /* Update the iova region for this domain */
+ region = data->plat_data->iova_region + region_id;
+ 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 && type != IOMMU_DOMAIN_UNMANAGED)
+ return NULL;
+
+ dom = kzalloc(sizeof(*dom), GFP_KERNEL);
+ if (!dom)
+ return NULL;
+ mutex_init(&dom->mutex);
+
+ 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), *frstdata;
+ struct mtk_iommu_domain *dom = to_mtk_domain(domain);
+ struct list_head *hw_list = data->hw_list;
+ struct device *m4udev = data->dev;
+ struct mtk_iommu_bank_data *bank;
+ unsigned int bankid;
+ int ret, region_id;
+
+ region_id = mtk_iommu_get_iova_region_id(dev, data->plat_data);
+ if (region_id < 0)
+ return region_id;
+
+ bankid = mtk_iommu_get_bank_id(dev, data->plat_data);
+ mutex_lock(&dom->mutex);
+ if (!dom->bank) {
+ /* Data is in the frstdata in sharing pgtable case. */
+ frstdata = mtk_iommu_get_frst_data(hw_list);
+
+ mutex_lock(&frstdata->mutex);
+ ret = mtk_iommu_domain_finalise(dom, frstdata, region_id);
+ mutex_unlock(&frstdata->mutex);
+ if (ret) {
+ mutex_unlock(&dom->mutex);
+ return -ENODEV;
+ }
+ dom->bank = &data->bank[bankid];
+ }
+ mutex_unlock(&dom->mutex);
+
+ mutex_lock(&data->mutex);
+ bank = &data->bank[bankid];
+ if (!bank->m4u_dom) { /* Initialize the M4U HW for each a BANK */
+ ret = pm_runtime_resume_and_get(m4udev);
+ if (ret < 0) {
+ dev_err(m4udev, "pm get fail(%d) in attach.\n", ret);
+ goto err_unlock;
+ }
+
+ ret = mtk_iommu_hw_init(data, bankid);
+ if (ret) {
+ pm_runtime_put(m4udev);
+ goto err_unlock;
+ }
+ bank->m4u_dom = dom;
+ writel(dom->cfg.arm_v7s_cfg.ttbr, bank->base + REG_MMU_PT_BASE_ADDR);
+
+ pm_runtime_put(m4udev);
+ }
+ mutex_unlock(&data->mutex);
+
+ return mtk_iommu_config(data, dev, true, region_id);
+
+err_unlock:
+ mutex_unlock(&data->mutex);
+ return ret;
+}
+
+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->bank->parent_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);
+
+ if (dom->bank)
+ mtk_iommu_tlb_flush_all(dom->bank->parent_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, dom->bank);
+}
+
+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, dom->bank);
+}
+
+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->bank->parent_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);
+
+ if (!MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM))
+ return &data->iommu;
+
+ /*
+ * 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]);
+ if (larbid >= MTK_LARB_NR_MAX)
+ return ERR_PTR(-EINVAL);
+
+ 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;
+ if (!larbdev)
+ return ERR_PTR(-EINVAL);
+
+ 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;
+
+ data = dev_iommu_priv_get(dev);
+ if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) {
+ larbid = MTK_M4U_TO_LARB(fwspec->ids[0]);
+ larbdev = data->larb_imu[larbid].dev;
+ device_link_remove(dev, larbdev);
+ }
+}
+
+static int mtk_iommu_get_group_id(struct device *dev, const struct mtk_iommu_plat_data *plat_data)
+{
+ unsigned int bankid;
+
+ /*
+ * If the bank function is enabled, each bank is a iommu group/domain.
+ * Otherwise, each iova region is a iommu group/domain.
+ */
+ bankid = mtk_iommu_get_bank_id(dev, plat_data);
+ if (bankid)
+ return bankid;
+
+ return mtk_iommu_get_iova_region_id(dev, plat_data);
+}
+
+static struct iommu_group *mtk_iommu_device_group(struct device *dev)
+{
+ struct mtk_iommu_data *c_data = dev_iommu_priv_get(dev), *data;
+ struct list_head *hw_list = c_data->hw_list;
+ struct iommu_group *group;
+ int groupid;
+
+ data = mtk_iommu_get_frst_data(hw_list);
+ if (!data)
+ return ERR_PTR(-ENODEV);
+
+ groupid = mtk_iommu_get_group_id(dev, data->plat_data);
+ if (groupid < 0)
+ return ERR_PTR(groupid);
+
+ mutex_lock(&data->mutex);
+ group = data->m4u_group[groupid];
+ if (!group) {
+ group = iommu_group_alloc();
+ if (!IS_ERR(group))
+ data->m4u_group[groupid] = group;
+ } else {
+ iommu_group_ref_get(group);
+ }
+ mutex_unlock(&data->mutex);
+ 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 regionid = mtk_iommu_get_iova_region_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)regionid < 0)
+ return;
+ curdom = data->plat_data->iova_region + regionid;
+ 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,
+ GFP_KERNEL);
+ if (!region)
+ return;
+
+ list_add_tail(&region->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,
+ .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, unsigned int bankid)
+{
+ const struct mtk_iommu_bank_data *bankx = &data->bank[bankid];
+ const struct mtk_iommu_bank_data *bank0 = &data->bank[0];
+ u32 regval;
+
+ /*
+ * Global control settings are in bank0. May re-init these global registers
+ * since no sure if there is bank0 consumers.
+ */
+ if (MTK_IOMMU_HAS_FLAG(data->plat_data, TF_PORT_TO_ADDR_MT8173)) {
+ regval = F_MMU_PREFETCH_RT_REPLACE_MOD |
+ F_MMU_TF_PROT_TO_PROGRAM_ADDR_MT8173;
+ } else {
+ regval = readl_relaxed(bank0->base + REG_MMU_CTRL_REG);
+ regval |= F_MMU_TF_PROT_TO_PROGRAM_ADDR;
+ }
+ writel_relaxed(regval, bank0->base + REG_MMU_CTRL_REG);
+
+ 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, bank0->base + REG_MMU_VLD_PA_RNG);
+ }
+ if (MTK_IOMMU_HAS_FLAG(data->plat_data, DCM_DISABLE))
+ writel_relaxed(F_MMU_DCM, bank0->base + REG_MMU_DCM_DIS);
+ else
+ writel_relaxed(0, bank0->base + REG_MMU_DCM_DIS);
+
+ if (MTK_IOMMU_HAS_FLAG(data->plat_data, WR_THROT_EN)) {
+ /* write command throttling mode */
+ regval = readl_relaxed(bank0->base + REG_MMU_WR_LEN_CTRL);
+ regval &= ~F_MMU_WR_THROT_DIS_MASK;
+ writel_relaxed(regval, bank0->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(bank0->base + REG_MMU_MISC_CTRL);
+ if (!MTK_IOMMU_HAS_FLAG(data->plat_data, STD_AXI_MODE))
+ 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, bank0->base + REG_MMU_MISC_CTRL);
+
+ /* Independent settings for each bank */
+ 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, bankx->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, bankx->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, bankx->base + REG_MMU_IVRP_PADDR);
+
+ if (devm_request_irq(bankx->parent_dev, bankx->irq, mtk_iommu_isr, 0,
+ dev_name(bankx->parent_dev), (void *)bankx)) {
+ writel_relaxed(0, bankx->base + REG_MMU_PT_BASE_ADDR);
+ dev_err(bankx->parent_dev, "Failed @ IRQ-%d Request\n", bankx->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_mm_dts_parse(struct device *dev, struct component_match **match,
+ struct mtk_iommu_data *data)
+{
+ struct device_node *larbnode, *smicomm_node, *smi_subcomm_node;
+ struct platform_device *plarbdev, *pcommdev;
+ struct device_link *link;
+ int i, larb_nr, ret;
+
+ larb_nr = of_count_phandle_with_args(dev->of_node, "mediatek,larbs", NULL);
+ if (larb_nr < 0)
+ return larb_nr;
+ if (larb_nr == 0 || larb_nr > MTK_LARB_NR_MAX)
+ return -EINVAL;
+
+ for (i = 0; i < larb_nr; i++) {
+ u32 id;
+
+ larbnode = of_parse_phandle(dev->of_node, "mediatek,larbs", i);
+ if (!larbnode) {
+ ret = -EINVAL;
+ goto err_larbdev_put;
+ }
+
+ 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;
+ if (id >= MTK_LARB_NR_MAX) {
+ of_node_put(larbnode);
+ ret = -EINVAL;
+ goto err_larbdev_put;
+ }
+
+ plarbdev = of_find_device_by_node(larbnode);
+ of_node_put(larbnode);
+ if (!plarbdev) {
+ ret = -ENODEV;
+ goto err_larbdev_put;
+ }
+ if (data->larb_imu[id].dev) {
+ platform_device_put(plarbdev);
+ ret = -EEXIST;
+ goto err_larbdev_put;
+ }
+ data->larb_imu[id].dev = &plarbdev->dev;
+
+ if (!plarbdev->dev.driver) {
+ ret = -EPROBE_DEFER;
+ goto err_larbdev_put;
+ }
+
+ component_match_add(dev, match, component_compare_dev, &plarbdev->dev);
+ platform_device_put(plarbdev);
+ }
+
+ /* Get smi-(sub)-common dev from the last larb. */
+ smi_subcomm_node = of_parse_phandle(larbnode, "mediatek,smi", 0);
+ if (!smi_subcomm_node)
+ return -EINVAL;
+
+ /*
+ * It may have two level smi-common. the node is smi-sub-common if it
+ * has a new mediatek,smi property. otherwise it is smi-commmon.
+ */
+ smicomm_node = of_parse_phandle(smi_subcomm_node, "mediatek,smi", 0);
+ if (smicomm_node)
+ of_node_put(smi_subcomm_node);
+ else
+ smicomm_node = smi_subcomm_node;
+
+ pcommdev = of_find_device_by_node(smicomm_node);
+ of_node_put(smicomm_node);
+ if (!pcommdev)
+ return -ENODEV;
+ data->smicomm_dev = &pcommdev->dev;
+
+ link = device_link_add(data->smicomm_dev, dev,
+ DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME);
+ platform_device_put(pcommdev);
+ if (!link) {
+ dev_err(dev, "Unable to link %s.\n", dev_name(data->smicomm_dev));
+ return -EINVAL;
+ }
+ return 0;
+
+err_larbdev_put:
+ for (i = MTK_LARB_NR_MAX - 1; i >= 0; i--) {
+ if (!data->larb_imu[i].dev)
+ continue;
+ put_device(data->larb_imu[i].dev);
+ }
+ return ret;
+}
+
+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;
+ struct regmap *infracfg;
+ void *protect;
+ int ret, banks_num, i = 0;
+ u32 val;
+ char *p;
+ struct mtk_iommu_bank_data *bank;
+ void __iomem *base;
+
+ 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)) {
+ infracfg = syscon_regmap_lookup_by_phandle(dev->of_node, "mediatek,infracfg");
+ if (IS_ERR(infracfg)) {
+ /*
+ * Legacy devicetrees will not specify a phandle to
+ * mediatek,infracfg: in that case, we use the older
+ * way to retrieve a syscon to infra.
+ *
+ * This is for retrocompatibility purposes only, hence
+ * no more compatibles shall be added to this.
+ */
+ 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);
+ }
+
+ banks_num = data->plat_data->banks_num;
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -EINVAL;
+ if (resource_size(res) < banks_num * MTK_IOMMU_BANK_SZ) {
+ dev_err(dev, "banknr %d. res %pR is not enough.\n", banks_num, res);
+ return -EINVAL;
+ }
+ base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+ ioaddr = res->start;
+
+ data->bank = devm_kmalloc(dev, banks_num * sizeof(*data->bank), GFP_KERNEL);
+ if (!data->bank)
+ return -ENOMEM;
+
+ do {
+ if (!data->plat_data->banks_enable[i])
+ continue;
+ bank = &data->bank[i];
+ bank->id = i;
+ bank->base = base + i * MTK_IOMMU_BANK_SZ;
+ bank->m4u_dom = NULL;
+
+ bank->irq = platform_get_irq(pdev, i);
+ if (bank->irq < 0)
+ return bank->irq;
+ bank->parent_dev = dev;
+ bank->parent_data = data;
+ spin_lock_init(&bank->tlb_lock);
+ } while (++i < banks_num);
+
+ 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);
+ }
+
+ if (MTK_IOMMU_HAS_FLAG(data->plat_data, PGTABLE_PA_35_EN)) {
+ ret = dma_set_mask(dev, DMA_BIT_MASK(35));
+ if (ret) {
+ dev_err(dev, "Failed to set dma_mask 35.\n");
+ return ret;
+ }
+ }
+
+ pm_runtime_enable(dev);
+
+ if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) {
+ ret = mtk_iommu_mm_dts_parse(dev, &match, data);
+ if (ret) {
+ dev_err_probe(dev, ret, "mm dts parse fail\n");
+ goto out_runtime_disable;
+ }
+ } else if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_INFRA)) {
+ p = data->plat_data->pericfg_comp_str;
+ data->pericfg = syscon_regmap_lookup_by_compatible(p);
+ if (IS_ERR(data->pericfg)) {
+ ret = PTR_ERR(data->pericfg);
+ goto out_runtime_disable;
+ }
+ }
+
+ platform_set_drvdata(pdev, data);
+ mutex_init(&data->mutex);
+
+ 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;
+
+ if (MTK_IOMMU_HAS_FLAG(data->plat_data, SHARE_PGTABLE)) {
+ list_add_tail(&data->list, data->plat_data->hw_list);
+ data->hw_list = data->plat_data->hw_list;
+ } else {
+ INIT_LIST_HEAD(&data->hw_list_head);
+ list_add_tail(&data->list, &data->hw_list_head);
+ data->hw_list = &data->hw_list_head;
+ }
+
+ if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) {
+ ret = component_master_add_with_match(dev, &mtk_iommu_com_ops, match);
+ if (ret)
+ goto out_list_del;
+ }
+ return ret;
+
+out_list_del:
+ list_del(&data->list);
+ iommu_device_unregister(&data->iommu);
+out_sysfs_remove:
+ iommu_device_sysfs_remove(&data->iommu);
+out_link_remove:
+ if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM))
+ 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);
+ struct mtk_iommu_bank_data *bank;
+ int i;
+
+ iommu_device_sysfs_remove(&data->iommu);
+ iommu_device_unregister(&data->iommu);
+
+ list_del(&data->list);
+
+ if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) {
+ device_link_remove(data->smicomm_dev, &pdev->dev);
+ component_master_del(&pdev->dev, &mtk_iommu_com_ops);
+ }
+ pm_runtime_disable(&pdev->dev);
+ for (i = 0; i < data->plat_data->banks_num; i++) {
+ bank = &data->bank[i];
+ if (!bank->m4u_dom)
+ continue;
+ devm_free_irq(&pdev->dev, bank->irq, bank);
+ }
+ 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;
+ int i = 0;
+
+ base = data->bank[i].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->vld_pa_rng = readl_relaxed(base + REG_MMU_VLD_PA_RNG);
+ do {
+ if (!data->plat_data->banks_enable[i])
+ continue;
+ base = data->bank[i].base;
+ reg->int_control[i] = readl_relaxed(base + REG_MMU_INT_CONTROL0);
+ reg->int_main_control[i] = readl_relaxed(base + REG_MMU_INT_MAIN_CONTROL);
+ reg->ivrp_paddr[i] = readl_relaxed(base + REG_MMU_IVRP_PADDR);
+ } while (++i < data->plat_data->banks_num);
+ 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;
+ void __iomem *base;
+ int ret, i = 0;
+
+ 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 (!reg->wr_len_ctrl)
+ return 0;
+
+ base = data->bank[i].base;
+ 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->vld_pa_rng, base + REG_MMU_VLD_PA_RNG);
+ do {
+ m4u_dom = data->bank[i].m4u_dom;
+ if (!data->plat_data->banks_enable[i] || !m4u_dom)
+ continue;
+ base = data->bank[i].base;
+ writel_relaxed(reg->int_control[i], base + REG_MMU_INT_CONTROL0);
+ writel_relaxed(reg->int_main_control[i], base + REG_MMU_INT_MAIN_CONTROL);
+ writel_relaxed(reg->ivrp_paddr[i], base + REG_MMU_IVRP_PADDR);
+ writel(m4u_dom->cfg.arm_v7s_cfg.ttbr, base + REG_MMU_PT_BASE_ADDR);
+ } while (++i < data->plat_data->banks_num);
+
+ /*
+ * 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 | SHARE_PGTABLE |
+ MTK_IOMMU_TYPE_MM,
+ .hw_list = &m4ulist,
+ .inv_sel_reg = REG_MMU_INV_SEL_GEN1,
+ .iova_region = single_domain,
+ .banks_num = 1,
+ .banks_enable = {true},
+ .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_2BITS | OUT_ORDER_WR_EN | WR_THROT_EN |
+ MTK_IOMMU_TYPE_MM | PGTABLE_PA_35_EN,
+ .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),
+ .larbid_remap = {{0}, {1}, {2}, {3}, {5}, {7, 8}, {10}, {9}},
+};
+
+static const struct mtk_iommu_plat_data mt6795_data = {
+ .m4u_plat = M4U_MT6795,
+ .flags = HAS_4GB_MODE | HAS_BCLK | RESET_AXI |
+ HAS_LEGACY_IVRP_PADDR | MTK_IOMMU_TYPE_MM |
+ TF_PORT_TO_ADDR_MT8173,
+ .inv_sel_reg = REG_MMU_INV_SEL_GEN1,
+ .banks_num = 1,
+ .banks_enable = {true},
+ .iova_region = single_domain,
+ .iova_region_nr = ARRAY_SIZE(single_domain),
+ .larbid_remap = {{0}, {1}, {2}, {3}, {4}}, /* Linear mapping. */
+};
+
+static const struct mtk_iommu_plat_data mt8167_data = {
+ .m4u_plat = M4U_MT8167,
+ .flags = RESET_AXI | HAS_LEGACY_IVRP_PADDR | MTK_IOMMU_TYPE_MM,
+ .inv_sel_reg = REG_MMU_INV_SEL_GEN1,
+ .banks_num = 1,
+ .banks_enable = {true},
+ .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 | MTK_IOMMU_TYPE_MM |
+ TF_PORT_TO_ADDR_MT8173,
+ .inv_sel_reg = REG_MMU_INV_SEL_GEN1,
+ .banks_num = 1,
+ .banks_enable = {true},
+ .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 | MTK_IOMMU_TYPE_MM,
+ .inv_sel_reg = REG_MMU_INV_SEL_GEN1,
+ .banks_num = 1,
+ .banks_enable = {true},
+ .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 mt8186_data_mm = {
+ .m4u_plat = M4U_MT8186,
+ .flags = HAS_BCLK | HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN |
+ WR_THROT_EN | IOVA_34_EN | MTK_IOMMU_TYPE_MM,
+ .larbid_remap = {{0}, {1, MTK_INVALID_LARBID, 8}, {4}, {7}, {2}, {9, 11, 19, 20},
+ {MTK_INVALID_LARBID, 14, 16},
+ {MTK_INVALID_LARBID, 13, MTK_INVALID_LARBID, 17}},
+ .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),
+};
+
+static const struct mtk_iommu_plat_data mt8192_data = {
+ .m4u_plat = M4U_MT8192,
+ .flags = HAS_BCLK | HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN |
+ WR_THROT_EN | IOVA_34_EN | MTK_IOMMU_TYPE_MM,
+ .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 = {{0}, {1}, {4, 5}, {7}, {2}, {9, 11, 19, 20},
+ {0, 14, 16}, {0, 13, 18, 17}},
+};
+
+static const struct mtk_iommu_plat_data mt8195_data_infra = {
+ .m4u_plat = M4U_MT8195,
+ .flags = WR_THROT_EN | DCM_DISABLE | STD_AXI_MODE | PM_CLK_AO |
+ MTK_IOMMU_TYPE_INFRA | IFA_IOMMU_PCIE_SUPPORT,
+ .pericfg_comp_str = "mediatek,mt8195-pericfg_ao",
+ .inv_sel_reg = REG_MMU_INV_SEL_GEN2,
+ .banks_num = 5,
+ .banks_enable = {true, false, false, false, true},
+ .banks_portmsk = {[0] = GENMASK(19, 16), /* PCIe */
+ [4] = GENMASK(31, 20), /* USB */
+ },
+ .iova_region = single_domain,
+ .iova_region_nr = ARRAY_SIZE(single_domain),
+};
+
+static const struct mtk_iommu_plat_data mt8195_data_vdo = {
+ .m4u_plat = M4U_MT8195,
+ .flags = HAS_BCLK | HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN |
+ WR_THROT_EN | IOVA_34_EN | SHARE_PGTABLE | 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}, {24}, {7}, {19}, {9, 10, 11},
+ {13, 17, 15/* 17b */, 25}, {5}},
+};
+
+static const struct mtk_iommu_plat_data mt8195_data_vpp = {
+ .m4u_plat = M4U_MT8195,
+ .flags = HAS_BCLK | HAS_SUB_COMM_3BITS | OUT_ORDER_WR_EN |
+ WR_THROT_EN | IOVA_34_EN | SHARE_PGTABLE | 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},
+ {22, MTK_INVALID_LARBID, MTK_INVALID_LARBID, MTK_INVALID_LARBID, 23},
+ {8}, {20}, {12},
+ /* 16: 16a; 29: 16b; 30: CCUtop0; 31: CCUtop1 */
+ {14, 16, 29, 26, 30, 31, 18},
+ {4, MTK_INVALID_LARBID, MTK_INVALID_LARBID, MTK_INVALID_LARBID, 6}},
+};
+
+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,mt6795-m4u", .data = &mt6795_data},
+ { .compatible = "mediatek,mt8167-m4u", .data = &mt8167_data},
+ { .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,mt8192-m4u", .data = &mt8192_data},
+ { .compatible = "mediatek,mt8195-iommu-infra", .data = &mt8195_data_infra},
+ { .compatible = "mediatek,mt8195-iommu-vdo", .data = &mt8195_data_vdo},
+ { .compatible = "mediatek,mt8195-iommu-vpp", .data = &mt8195_data_vpp},
+ {}
+};
+
+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");