drivers/iommu/mtk_iommu.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2015-2016 MediaTek Inc.
   4  * Author: Yong Wu <[email protected]>
   5  */
   6 #include <linux/bitfield.h>
   7 #include <linux/bug.h>
   8 #include <linux/clk.h>
   9 #include <linux/component.h>
  10 #include <linux/device.h>
  11 #include <linux/dma-direct.h>
  12 #include <linux/dma-iommu.h>
  13 #include <linux/err.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/io.h>
  16 #include <linux/iommu.h>
  17 #include <linux/iopoll.h>
  18 #include <linux/list.h>
  19 #include <linux/mfd/syscon.h>
  20 #include <linux/module.h>
  21 #include <linux/of_address.h>
  22 #include <linux/of_irq.h>
  23 #include <linux/of_platform.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/pm_runtime.h>
  26 #include <linux/regmap.h>
  27 #include <linux/slab.h>
  28 #include <linux/spinlock.h>
  29 #include <linux/soc/mediatek/infracfg.h>
  30 #include <asm/barrier.h>
  31 #include <soc/mediatek/smi.h>
  32
  33 #include "mtk_iommu.h"
  34
  35 #define REG_MMU_PT_BASE_ADDR                    0x000
  36 #define MMU_PT_ADDR_MASK                        GENMASK(31, 7)
  37
  38 #define REG_MMU_INVALIDATE                      0x020
  39 #define F_ALL_INVLD                             0x2
  40 #define F_MMU_INV_RANGE                         0x1
  41
  42 #define REG_MMU_INVLD_START_A                   0x024
  43 #define REG_MMU_INVLD_END_A                     0x028
  44
  45 #define REG_MMU_INV_SEL_GEN2                    0x02c
  46 #define REG_MMU_INV_SEL_GEN1                    0x038
  47 #define F_INVLD_EN0                             BIT(0)
  48 #define F_INVLD_EN1                             BIT(1)
  49
  50 #define REG_MMU_MISC_CTRL                       0x048
  51 #define F_MMU_IN_ORDER_WR_EN_MASK               (BIT(1) | BIT(17))
  52 #define F_MMU_STANDARD_AXI_MODE_MASK            (BIT(3) | BIT(19))
  53
  54 #define REG_MMU_DCM_DIS                         0x050
  55 #define REG_MMU_WR_LEN_CTRL                     0x054
  56 #define F_MMU_WR_THROT_DIS_MASK                 (BIT(5) | BIT(21))
  57
  58 #define REG_MMU_CTRL_REG                        0x110
  59 #define F_MMU_TF_PROT_TO_PROGRAM_ADDR           (2 << 4)
  60 #define F_MMU_PREFETCH_RT_REPLACE_MOD           BIT(4)
  61 #define F_MMU_TF_PROT_TO_PROGRAM_ADDR_MT8173    (2 << 5)
  62
  63 #define REG_MMU_IVRP_PADDR                      0x114
  64
  65 #define REG_MMU_VLD_PA_RNG                      0x118
  66 #define F_MMU_VLD_PA_RNG(EA, SA)                (((EA) << 8) | (SA))
  67
  68 #define REG_MMU_INT_CONTROL0                    0x120
  69 #define F_L2_MULIT_HIT_EN                       BIT(0)
  70 #define F_TABLE_WALK_FAULT_INT_EN               BIT(1)
  71 #define F_PREETCH_FIFO_OVERFLOW_INT_EN          BIT(2)
  72 #define F_MISS_FIFO_OVERFLOW_INT_EN             BIT(3)
  73 #define F_PREFETCH_FIFO_ERR_INT_EN              BIT(5)
  74 #define F_MISS_FIFO_ERR_INT_EN                  BIT(6)
  75 #define F_INT_CLR_BIT                           BIT(12)
  76
  77 #define REG_MMU_INT_MAIN_CONTROL                0x124
  78                                                 /* mmu0 | mmu1 */
  79 #define F_INT_TRANSLATION_FAULT                 (BIT(0) | BIT(7))
  80 #define F_INT_MAIN_MULTI_HIT_FAULT              (BIT(1) | BIT(8))
  81 #define F_INT_INVALID_PA_FAULT                  (BIT(2) | BIT(9))
  82 #define F_INT_ENTRY_REPLACEMENT_FAULT           (BIT(3) | BIT(10))
  83 #define F_INT_TLB_MISS_FAULT                    (BIT(4) | BIT(11))
  84 #define F_INT_MISS_TRANSACTION_FIFO_FAULT       (BIT(5) | BIT(12))
  85 #define F_INT_PRETETCH_TRANSATION_FIFO_FAULT    (BIT(6) | BIT(13))
  86
  87 #define REG_MMU_CPE_DONE                        0x12C
  88
  89 #define REG_MMU_FAULT_ST1                       0x134
  90 #define F_REG_MMU0_FAULT_MASK                   GENMASK(6, 0)
  91 #define F_REG_MMU1_FAULT_MASK                   GENMASK(13, 7)
  92
  93 #define REG_MMU0_FAULT_VA                       0x13c
  94 #define F_MMU_INVAL_VA_31_12_MASK               GENMASK(31, 12)
  95 #define F_MMU_INVAL_VA_34_32_MASK               GENMASK(11, 9)
  96 #define F_MMU_INVAL_PA_34_32_MASK               GENMASK(8, 6)
  97 #define F_MMU_FAULT_VA_WRITE_BIT                BIT(1)
  98 #define F_MMU_FAULT_VA_LAYER_BIT                BIT(0)
  99
 100 #define REG_MMU0_INVLD_PA                       0x140
 101 #define REG_MMU1_FAULT_VA                       0x144
 102 #define REG_MMU1_INVLD_PA                       0x148
 103 #define REG_MMU0_INT_ID                         0x150
 104 #define REG_MMU1_INT_ID                         0x154
 105 #define F_MMU_INT_ID_COMM_ID(a)                 (((a) >> 9) & 0x7)
 106 #define F_MMU_INT_ID_SUB_COMM_ID(a)             (((a) >> 7) & 0x3)
 107 #define F_MMU_INT_ID_LARB_ID(a)                 (((a) >> 7) & 0x7)
 108 #define F_MMU_INT_ID_PORT_ID(a)                 (((a) >> 2) & 0x1f)
 109
 110 #define MTK_PROTECT_PA_ALIGN                    256
 111
 112 #define HAS_4GB_MODE                    BIT(0)
 113 /* HW will use the EMI clock if there isn't the "bclk". */
 114 #define HAS_BCLK                        BIT(1)
 115 #define HAS_VLD_PA_RNG                  BIT(2)
 116 #define RESET_AXI                       BIT(3)
 117 #define OUT_ORDER_WR_EN                 BIT(4)
 118 #define HAS_SUB_COMM                    BIT(5)
 119 #define WR_THROT_EN                     BIT(6)
 120 #define HAS_LEGACY_IVRP_PADDR           BIT(7)
 121 #define IOVA_34_EN                      BIT(8)
 122
 123 #define MTK_IOMMU_HAS_FLAG(pdata, _x) \
 124                 ((((pdata)->flags) & (_x)) == (_x))
 125
 126 struct mtk_iommu_domain {
 127         struct io_pgtable_cfg           cfg;
 128         struct io_pgtable_ops           *iop;
 129
 130         struct mtk_iommu_data           *data;
 131         struct iommu_domain             domain;
 132 };
 133
 134 static const struct iommu_ops mtk_iommu_ops;
 135
 136 static int mtk_iommu_hw_init(const struct mtk_iommu_data *data);
 137
 138 #define MTK_IOMMU_TLB_ADDR(iova) ({                                     \
 139         dma_addr_t _addr = iova;                                        \
 140         ((lower_32_bits(_addr) & GENMASK(31, 12)) | upper_32_bits(_addr));\
 141 })
 142
 143 /*
 144  * In M4U 4GB mode, the physical address is remapped as below:
 145  *
 146  * CPU Physical address:
 147  * ====================
 148  *
 149  * 0      1G       2G     3G       4G     5G
 150  * |---A---|---B---|---C---|---D---|---E---|
 151  * +--I/O--+------------Memory-------------+
 152  *
 153  * IOMMU output physical address:
 154  *  =============================
 155  *
 156  *                                 4G      5G     6G      7G      8G
 157  *                                 |---E---|---B---|---C---|---D---|
 158  *                                 +------------Memory-------------+
 159  *
 160  * The Region 'A'(I/O) can NOT be mapped by M4U; For Region 'B'/'C'/'D', the
 161  * bit32 of the CPU physical address always is needed to set, and for Region
 162  * 'E', the CPU physical address keep as is.
 163  * Additionally, The iommu consumers always use the CPU phyiscal address.
 164  */
 165 #define MTK_IOMMU_4GB_MODE_REMAP_BASE    0x140000000UL
 166
 167 static LIST_HEAD(m4ulist);      /* List all the M4U HWs */
 168
 169 #define for_each_m4u(data)      list_for_each_entry(data, &m4ulist, list)
 170
 171 struct mtk_iommu_iova_region {
 172         dma_addr_t              iova_base;
 173         unsigned long long      size;
 174 };
 175
 176 static const struct mtk_iommu_iova_region single_domain[] = {
 177         {.iova_base = 0,                .size = SZ_4G},
 178 };
 179
 180 static const struct mtk_iommu_iova_region mt8192_multi_dom[] = {
 181         { .iova_base = 0x0,             .size = SZ_4G},         /* disp: 0 ~ 4G */
 182         #if IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT)
 183         { .iova_base = SZ_4G,           .size = SZ_4G},         /* vdec: 4G ~ 8G */
 184         { .iova_base = SZ_4G * 2,       .size = SZ_4G},         /* CAM/MDP: 8G ~ 12G */
 185         { .iova_base = 0x240000000ULL,  .size = 0x4000000},     /* CCU0 */
 186         { .iova_base = 0x244000000ULL,  .size = 0x4000000},     /* CCU1 */
 187         #endif
 188 };
 189
 190 /*
 191  * There may be 1 or 2 M4U HWs, But we always expect they are in the same domain
 192  * for the performance.
 193  *
 194  * Here always return the mtk_iommu_data of the first probed M4U where the
 195  * iommu domain information is recorded.
 196  */
 197 static struct mtk_iommu_data *mtk_iommu_get_m4u_data(void)
 198 {
 199         struct mtk_iommu_data *data;
 200
 201         for_each_m4u(data)
 202                 return data;
 203
 204         return NULL;
 205 }
 206
 207 static struct mtk_iommu_domain *to_mtk_domain(struct iommu_domain *dom)
 208 {
 209         return container_of(dom, struct mtk_iommu_domain, domain);
 210 }
 211
 212 static void mtk_iommu_tlb_flush_all(struct mtk_iommu_data *data)
 213 {
 214         for_each_m4u(data) {
 215                 if (pm_runtime_get_if_in_use(data->dev) <= 0)
 216                         continue;
 217
 218                 writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0,
 219                                data->base + data->plat_data->inv_sel_reg);
 220                 writel_relaxed(F_ALL_INVLD, data->base + REG_MMU_INVALIDATE);
 221                 wmb(); /* Make sure the tlb flush all done */
 222
 223                 pm_runtime_put(data->dev);
 224         }
 225 }
 226
 227 static void mtk_iommu_tlb_flush_range_sync(unsigned long iova, size_t size,
 228                                            size_t granule,
 229                                            struct mtk_iommu_data *data)
 230 {
 231         bool has_pm = !!data->dev->pm_domain;
 232         unsigned long flags;
 233         int ret;
 234         u32 tmp;
 235
 236         for_each_m4u(data) {
 237                 if (has_pm) {
 238                         if (pm_runtime_get_if_in_use(data->dev) <= 0)
 239                                 continue;
 240                 }
 241
 242                 spin_lock_irqsave(&data->tlb_lock, flags);
 243                 writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0,
 244                                data->base + data->plat_data->inv_sel_reg);
 245
 246                 writel_relaxed(MTK_IOMMU_TLB_ADDR(iova),
 247                                data->base + REG_MMU_INVLD_START_A);
 248                 writel_relaxed(MTK_IOMMU_TLB_ADDR(iova + size - 1),
 249                                data->base + REG_MMU_INVLD_END_A);
 250                 writel_relaxed(F_MMU_INV_RANGE,
 251                                data->base + REG_MMU_INVALIDATE);
 252
 253                 /* tlb sync */
 254                 ret = readl_poll_timeout_atomic(data->base + REG_MMU_CPE_DONE,
 255                                                 tmp, tmp != 0, 10, 1000);
 256                 if (ret) {
 257                         dev_warn(data->dev,
 258                                  "Partial TLB flush timed out, falling back to full flush\n");
 259                         mtk_iommu_tlb_flush_all(data);
 260                 }
 261                 /* Clear the CPE status */
 262                 writel_relaxed(0, data->base + REG_MMU_CPE_DONE);
 263                 spin_unlock_irqrestore(&data->tlb_lock, flags);
 264
 265                 if (has_pm)
 266                         pm_runtime_put(data->dev);
 267         }
 268 }
 269
 270 static irqreturn_t mtk_iommu_isr(int irq, void *dev_id)
 271 {
 272         struct mtk_iommu_data *data = dev_id;
 273         struct mtk_iommu_domain *dom = data->m4u_dom;
 274         unsigned int fault_larb, fault_port, sub_comm = 0;
 275         u32 int_state, regval, va34_32, pa34_32;
 276         u64 fault_iova, fault_pa;
 277         bool layer, write;
 278
 279         /* Read error info from registers */
 280         int_state = readl_relaxed(data->base + REG_MMU_FAULT_ST1);
 281         if (int_state & F_REG_MMU0_FAULT_MASK) {
 282                 regval = readl_relaxed(data->base + REG_MMU0_INT_ID);
 283                 fault_iova = readl_relaxed(data->base + REG_MMU0_FAULT_VA);
 284                 fault_pa = readl_relaxed(data->base + REG_MMU0_INVLD_PA);
 285         } else {
 286                 regval = readl_relaxed(data->base + REG_MMU1_INT_ID);
 287                 fault_iova = readl_relaxed(data->base + REG_MMU1_FAULT_VA);
 288                 fault_pa = readl_relaxed(data->base + REG_MMU1_INVLD_PA);
 289         }
 290         layer = fault_iova & F_MMU_FAULT_VA_LAYER_BIT;
 291         write = fault_iova & F_MMU_FAULT_VA_WRITE_BIT;
 292         if (MTK_IOMMU_HAS_FLAG(data->plat_data, IOVA_34_EN)) {
 293                 va34_32 = FIELD_GET(F_MMU_INVAL_VA_34_32_MASK, fault_iova);
 294                 pa34_32 = FIELD_GET(F_MMU_INVAL_PA_34_32_MASK, fault_iova);
 295                 fault_iova = fault_iova & F_MMU_INVAL_VA_31_12_MASK;
 296                 fault_iova |= (u64)va34_32 << 32;
 297                 fault_pa |= (u64)pa34_32 << 32;
 298         }
 299
 300         fault_port = F_MMU_INT_ID_PORT_ID(regval);
 301         if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_SUB_COMM)) {
 302                 fault_larb = F_MMU_INT_ID_COMM_ID(regval);
 303                 sub_comm = F_MMU_INT_ID_SUB_COMM_ID(regval);
 304         } else {
 305                 fault_larb = F_MMU_INT_ID_LARB_ID(regval);
 306         }
 307         fault_larb = data->plat_data->larbid_remap[fault_larb][sub_comm];
 308
 309         if (report_iommu_fault(&dom->domain, data->dev, fault_iova,
 310                                write ? IOMMU_FAULT_WRITE : IOMMU_FAULT_READ)) {
 311                 dev_err_ratelimited(
 312                         data->dev,
 313                         "fault type=0x%x iova=0x%llx pa=0x%llx larb=%d port=%d layer=%d %s\n",
 314                         int_state, fault_iova, fault_pa, fault_larb, fault_port,
 315                         layer, write ? "write" : "read");
 316         }
 317
 318         /* Interrupt clear */
 319         regval = readl_relaxed(data->base + REG_MMU_INT_CONTROL0);
 320         regval |= F_INT_CLR_BIT;
 321         writel_relaxed(regval, data->base + REG_MMU_INT_CONTROL0);
 322
 323         mtk_iommu_tlb_flush_all(data);
 324
 325         return IRQ_HANDLED;
 326 }
 327
 328 static int mtk_iommu_get_domain_id(struct device *dev,
 329                                    const struct mtk_iommu_plat_data *plat_data)
 330 {
 331         const struct mtk_iommu_iova_region *rgn = plat_data->iova_region;
 332         const struct bus_dma_region *dma_rgn = dev->dma_range_map;
 333         int i, candidate = -1;
 334         dma_addr_t dma_end;
 335
 336         if (!dma_rgn || plat_data->iova_region_nr == 1)
 337                 return 0;
 338
 339         dma_end = dma_rgn->dma_start + dma_rgn->size - 1;
 340         for (i = 0; i < plat_data->iova_region_nr; i++, rgn++) {
 341                 /* Best fit. */
 342                 if (dma_rgn->dma_start == rgn->iova_base &&
 343                     dma_end == rgn->iova_base + rgn->size - 1)
 344                         return i;
 345                 /* ok if it is inside this region. */
 346                 if (dma_rgn->dma_start >= rgn->iova_base &&
 347                     dma_end < rgn->iova_base + rgn->size)
 348                         candidate = i;
 349         }
 350
 351         if (candidate >= 0)
 352                 return candidate;
 353         dev_err(dev, "Can NOT find the iommu domain id(%pad 0x%llx).\n",
 354                 &dma_rgn->dma_start, dma_rgn->size);
 355         return -EINVAL;
 356 }
 357
 358 static void mtk_iommu_config(struct mtk_iommu_data *data, struct device *dev,
 359                              bool enable, unsigned int domid)
 360 {
 361         struct mtk_smi_larb_iommu    *larb_mmu;
 362         unsigned int                 larbid, portid;
 363         struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
 364         const struct mtk_iommu_iova_region *region;
 365         int i;
 366
 367         for (i = 0; i < fwspec->num_ids; ++i) {
 368                 larbid = MTK_M4U_TO_LARB(fwspec->ids[i]);
 369                 portid = MTK_M4U_TO_PORT(fwspec->ids[i]);
 370
 371                 larb_mmu = &data->larb_imu[larbid];
 372
 373                 region = data->plat_data->iova_region + domid;
 374                 larb_mmu->bank[portid] = upper_32_bits(region->iova_base);
 375
 376                 dev_dbg(dev, "%s iommu for larb(%s) port %d dom %d bank %d.\n",
 377                         enable ? "enable" : "disable", dev_name(larb_mmu->dev),
 378                         portid, domid, larb_mmu->bank[portid]);
 379
 380                 if (enable)
 381                         larb_mmu->mmu |= MTK_SMI_MMU_EN(portid);
 382                 else
 383                         larb_mmu->mmu &= ~MTK_SMI_MMU_EN(portid);
 384         }
 385 }
 386
 387 static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom,
 388                                      struct mtk_iommu_data *data,
 389                                      unsigned int domid)
 390 {
 391         const struct mtk_iommu_iova_region *region;
 392
 393         /* Use the exist domain as there is only one pgtable here. */
 394         if (data->m4u_dom) {
 395                 dom->iop = data->m4u_dom->iop;
 396                 dom->cfg = data->m4u_dom->cfg;
 397                 dom->domain.pgsize_bitmap = data->m4u_dom->cfg.pgsize_bitmap;
 398                 goto update_iova_region;
 399         }
 400
 401         dom->cfg = (struct io_pgtable_cfg) {
 402                 .quirks = IO_PGTABLE_QUIRK_ARM_NS |
 403                         IO_PGTABLE_QUIRK_NO_PERMS |
 404                         IO_PGTABLE_QUIRK_ARM_MTK_EXT,
 405                 .pgsize_bitmap = mtk_iommu_ops.pgsize_bitmap,
 406                 .ias = MTK_IOMMU_HAS_FLAG(data->plat_data, IOVA_34_EN) ? 34 : 32,
 407                 .iommu_dev = data->dev,
 408         };
 409
 410         if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_4GB_MODE))
 411                 dom->cfg.oas = data->enable_4GB ? 33 : 32;
 412         else
 413                 dom->cfg.oas = 35;
 414
 415         dom->iop = alloc_io_pgtable_ops(ARM_V7S, &dom->cfg, data);
 416         if (!dom->iop) {
 417                 dev_err(data->dev, "Failed to alloc io pgtable\n");
 418                 return -EINVAL;
 419         }
 420
 421         /* Update our support page sizes bitmap */
 422         dom->domain.pgsize_bitmap = dom->cfg.pgsize_bitmap;
 423
 424 update_iova_region:
 425         /* Update the iova region for this domain */
 426         region = data->plat_data->iova_region + domid;
 427         dom->domain.geometry.aperture_start = region->iova_base;
 428         dom->domain.geometry.aperture_end = region->iova_base + region->size - 1;
 429         dom->domain.geometry.force_aperture = true;
 430         return 0;
 431 }
 432
 433 static struct iommu_domain *mtk_iommu_domain_alloc(unsigned type)
 434 {
 435         struct mtk_iommu_domain *dom;
 436
 437         if (type != IOMMU_DOMAIN_DMA)
 438                 return NULL;
 439
 440         dom = kzalloc(sizeof(*dom), GFP_KERNEL);
 441         if (!dom)
 442                 return NULL;
 443
 444         if (iommu_get_dma_cookie(&dom->domain)) {
 445                 kfree(dom);
 446                 return NULL;
 447         }
 448
 449         return &dom->domain;
 450 }
 451
 452 static void mtk_iommu_domain_free(struct iommu_domain *domain)
 453 {
 454         iommu_put_dma_cookie(domain);
 455         kfree(to_mtk_domain(domain));
 456 }
 457
 458 static int mtk_iommu_attach_device(struct iommu_domain *domain,
 459                                    struct device *dev)
 460 {
 461         struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
 462         struct mtk_iommu_domain *dom = to_mtk_domain(domain);
 463         struct device *m4udev = data->dev;
 464         int ret, domid;
 465
 466         domid = mtk_iommu_get_domain_id(dev, data->plat_data);
 467         if (domid < 0)
 468                 return domid;
 469
 470         if (!dom->data) {
 471                 if (mtk_iommu_domain_finalise(dom, data, domid))
 472                         return -ENODEV;
 473                 dom->data = data;
 474         }
 475
 476         if (!data->m4u_dom) { /* Initialize the M4U HW */
 477                 ret = pm_runtime_resume_and_get(m4udev);
 478                 if (ret < 0)
 479                         return ret;
 480
 481                 ret = mtk_iommu_hw_init(data);
 482                 if (ret) {
 483                         pm_runtime_put(m4udev);
 484                         return ret;
 485                 }
 486                 data->m4u_dom = dom;
 487                 writel(dom->cfg.arm_v7s_cfg.ttbr & MMU_PT_ADDR_MASK,
 488                        data->base + REG_MMU_PT_BASE_ADDR);
 489
 490                 pm_runtime_put(m4udev);
 491         }
 492
 493         mtk_iommu_config(data, dev, true, domid);
 494         return 0;
 495 }
 496
 497 static void mtk_iommu_detach_device(struct iommu_domain *domain,
 498                                     struct device *dev)
 499 {
 500         struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
 501
 502         mtk_iommu_config(data, dev, false, 0);
 503 }
 504
 505 static int mtk_iommu_map(struct iommu_domain *domain, unsigned long iova,
 506                          phys_addr_t paddr, size_t size, int prot, gfp_t gfp)
 507 {
 508         struct mtk_iommu_domain *dom = to_mtk_domain(domain);
 509
 510         /* The "4GB mode" M4U physically can not use the lower remap of Dram. */
 511         if (dom->data->enable_4GB)
 512                 paddr |= BIT_ULL(32);
 513
 514         /* Synchronize with the tlb_lock */
 515         return dom->iop->map(dom->iop, iova, paddr, size, prot, gfp);
 516 }
 517
 518 static size_t mtk_iommu_unmap(struct iommu_domain *domain,
 519                               unsigned long iova, size_t size,
 520                               struct iommu_iotlb_gather *gather)
 521 {
 522         struct mtk_iommu_domain *dom = to_mtk_domain(domain);
 523         unsigned long end = iova + size - 1;
 524
 525         if (gather->start > iova)
 526                 gather->start = iova;
 527         if (gather->end < end)
 528                 gather->end = end;
 529         return dom->iop->unmap(dom->iop, iova, size, gather);
 530 }
 531
 532 static void mtk_iommu_flush_iotlb_all(struct iommu_domain *domain)
 533 {
 534         struct mtk_iommu_domain *dom = to_mtk_domain(domain);
 535
 536         mtk_iommu_tlb_flush_all(dom->data);
 537 }
 538
 539 static void mtk_iommu_iotlb_sync(struct iommu_domain *domain,
 540                                  struct iommu_iotlb_gather *gather)
 541 {
 542         struct mtk_iommu_domain *dom = to_mtk_domain(domain);
 543         size_t length = gather->end - gather->start + 1;
 544
 545         mtk_iommu_tlb_flush_range_sync(gather->start, length, gather->pgsize,
 546                                        dom->data);
 547 }
 548
 549 static void mtk_iommu_sync_map(struct iommu_domain *domain, unsigned long iova,
 550                                size_t size)
 551 {
 552         struct mtk_iommu_domain *dom = to_mtk_domain(domain);
 553
 554         mtk_iommu_tlb_flush_range_sync(iova, size, size, dom->data);
 555 }
 556
 557 static phys_addr_t mtk_iommu_iova_to_phys(struct iommu_domain *domain,
 558                                           dma_addr_t iova)
 559 {
 560         struct mtk_iommu_domain *dom = to_mtk_domain(domain);
 561         phys_addr_t pa;
 562
 563         pa = dom->iop->iova_to_phys(dom->iop, iova);
 564         if (dom->data->enable_4GB && pa >= MTK_IOMMU_4GB_MODE_REMAP_BASE)
 565                 pa &= ~BIT_ULL(32);
 566
 567         return pa;
 568 }
 569
 570 static struct iommu_device *mtk_iommu_probe_device(struct device *dev)
 571 {
 572         struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
 573         struct mtk_iommu_data *data;
 574
 575         if (!fwspec || fwspec->ops != &mtk_iommu_ops)
 576                 return ERR_PTR(-ENODEV); /* Not a iommu client device */
 577
 578         data = dev_iommu_priv_get(dev);
 579
 580         return &data->iommu;
 581 }
 582
 583 static void mtk_iommu_release_device(struct device *dev)
 584 {
 585         struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
 586
 587         if (!fwspec || fwspec->ops != &mtk_iommu_ops)
 588                 return;
 589
 590         iommu_fwspec_free(dev);
 591 }
 592
 593 static struct iommu_group *mtk_iommu_device_group(struct device *dev)
 594 {
 595         struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
 596         struct iommu_group *group;
 597         int domid;
 598
 599         if (!data)
 600                 return ERR_PTR(-ENODEV);
 601
 602         domid = mtk_iommu_get_domain_id(dev, data->plat_data);
 603         if (domid < 0)
 604                 return ERR_PTR(domid);
 605
 606         group = data->m4u_group[domid];
 607         if (!group) {
 608                 group = iommu_group_alloc();
 609                 if (!IS_ERR(group))
 610                         data->m4u_group[domid] = group;
 611         } else {
 612                 iommu_group_ref_get(group);
 613         }
 614         return group;
 615 }
 616
 617 static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args)
 618 {
 619         struct platform_device *m4updev;
 620
 621         if (args->args_count != 1) {
 622                 dev_err(dev, "invalid #iommu-cells(%d) property for IOMMU\n",
 623                         args->args_count);
 624                 return -EINVAL;
 625         }
 626
 627         if (!dev_iommu_priv_get(dev)) {
 628                 /* Get the m4u device */
 629                 m4updev = of_find_device_by_node(args->np);
 630                 if (WARN_ON(!m4updev))
 631                         return -EINVAL;
 632
 633                 dev_iommu_priv_set(dev, platform_get_drvdata(m4updev));
 634         }
 635
 636         return iommu_fwspec_add_ids(dev, args->args, 1);
 637 }
 638
 639 static void mtk_iommu_get_resv_regions(struct device *dev,
 640                                        struct list_head *head)
 641 {
 642         struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
 643         unsigned int domid = mtk_iommu_get_domain_id(dev, data->plat_data), i;
 644         const struct mtk_iommu_iova_region *resv, *curdom;
 645         struct iommu_resv_region *region;
 646         int prot = IOMMU_WRITE | IOMMU_READ;
 647
 648         if ((int)domid < 0)
 649                 return;
 650         curdom = data->plat_data->iova_region + domid;
 651         for (i = 0; i < data->plat_data->iova_region_nr; i++) {
 652                 resv = data->plat_data->iova_region + i;
 653
 654                 /* Only reserve when the region is inside the current domain */
 655                 if (resv->iova_base <= curdom->iova_base ||
 656                     resv->iova_base + resv->size >= curdom->iova_base + curdom->size)
 657                         continue;
 658
 659                 region = iommu_alloc_resv_region(resv->iova_base, resv->size,
 660                                                  prot, IOMMU_RESV_RESERVED);
 661                 if (!region)
 662                         return;
 663
 664                 list_add_tail(&region->list, head);
 665         }
 666 }
 667
 668 static const struct iommu_ops mtk_iommu_ops = {
 669         .domain_alloc   = mtk_iommu_domain_alloc,
 670         .domain_free    = mtk_iommu_domain_free,
 671         .attach_dev     = mtk_iommu_attach_device,
 672         .detach_dev     = mtk_iommu_detach_device,
 673         .map            = mtk_iommu_map,
 674         .unmap          = mtk_iommu_unmap,
 675         .flush_iotlb_all = mtk_iommu_flush_iotlb_all,
 676         .iotlb_sync     = mtk_iommu_iotlb_sync,
 677         .iotlb_sync_map = mtk_iommu_sync_map,
 678         .iova_to_phys   = mtk_iommu_iova_to_phys,
 679         .probe_device   = mtk_iommu_probe_device,
 680         .release_device = mtk_iommu_release_device,
 681         .device_group   = mtk_iommu_device_group,
 682         .of_xlate       = mtk_iommu_of_xlate,
 683         .get_resv_regions = mtk_iommu_get_resv_regions,
 684         .put_resv_regions = generic_iommu_put_resv_regions,
 685         .pgsize_bitmap  = SZ_4K | SZ_64K | SZ_1M | SZ_16M,
 686         .owner          = THIS_MODULE,
 687 };
 688
 689 static int mtk_iommu_hw_init(const struct mtk_iommu_data *data)
 690 {
 691         u32 regval;
 692
 693         if (data->plat_data->m4u_plat == M4U_MT8173) {
 694                 regval = F_MMU_PREFETCH_RT_REPLACE_MOD |
 695                          F_MMU_TF_PROT_TO_PROGRAM_ADDR_MT8173;
 696         } else {
 697                 regval = readl_relaxed(data->base + REG_MMU_CTRL_REG);
 698                 regval |= F_MMU_TF_PROT_TO_PROGRAM_ADDR;
 699         }
 700         writel_relaxed(regval, data->base + REG_MMU_CTRL_REG);
 701
 702         regval = F_L2_MULIT_HIT_EN |
 703                 F_TABLE_WALK_FAULT_INT_EN |
 704                 F_PREETCH_FIFO_OVERFLOW_INT_EN |
 705                 F_MISS_FIFO_OVERFLOW_INT_EN |
 706                 F_PREFETCH_FIFO_ERR_INT_EN |
 707                 F_MISS_FIFO_ERR_INT_EN;
 708         writel_relaxed(regval, data->base + REG_MMU_INT_CONTROL0);
 709
 710         regval = F_INT_TRANSLATION_FAULT |
 711                 F_INT_MAIN_MULTI_HIT_FAULT |
 712                 F_INT_INVALID_PA_FAULT |
 713                 F_INT_ENTRY_REPLACEMENT_FAULT |
 714                 F_INT_TLB_MISS_FAULT |
 715                 F_INT_MISS_TRANSACTION_FIFO_FAULT |
 716                 F_INT_PRETETCH_TRANSATION_FIFO_FAULT;
 717         writel_relaxed(regval, data->base + REG_MMU_INT_MAIN_CONTROL);
 718
 719         if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_LEGACY_IVRP_PADDR))
 720                 regval = (data->protect_base >> 1) | (data->enable_4GB << 31);
 721         else
 722                 regval = lower_32_bits(data->protect_base) |
 723                          upper_32_bits(data->protect_base);
 724         writel_relaxed(regval, data->base + REG_MMU_IVRP_PADDR);
 725
 726         if (data->enable_4GB &&
 727             MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_VLD_PA_RNG)) {
 728                 /*
 729                  * If 4GB mode is enabled, the validate PA range is from
 730                  * 0x1_0000_0000 to 0x1_ffff_ffff. here record bit[32:30].
 731                  */
 732                 regval = F_MMU_VLD_PA_RNG(7, 4);
 733                 writel_relaxed(regval, data->base + REG_MMU_VLD_PA_RNG);
 734         }
 735         writel_relaxed(0, data->base + REG_MMU_DCM_DIS);
 736         if (MTK_IOMMU_HAS_FLAG(data->plat_data, WR_THROT_EN)) {
 737                 /* write command throttling mode */
 738                 regval = readl_relaxed(data->base + REG_MMU_WR_LEN_CTRL);
 739                 regval &= ~F_MMU_WR_THROT_DIS_MASK;
 740                 writel_relaxed(regval, data->base + REG_MMU_WR_LEN_CTRL);
 741         }
 742
 743         if (MTK_IOMMU_HAS_FLAG(data->plat_data, RESET_AXI)) {
 744                 /* The register is called STANDARD_AXI_MODE in this case */
 745                 regval = 0;
 746         } else {
 747                 regval = readl_relaxed(data->base + REG_MMU_MISC_CTRL);
 748                 regval &= ~F_MMU_STANDARD_AXI_MODE_MASK;
 749                 if (MTK_IOMMU_HAS_FLAG(data->plat_data, OUT_ORDER_WR_EN))
 750                         regval &= ~F_MMU_IN_ORDER_WR_EN_MASK;
 751         }
 752         writel_relaxed(regval, data->base + REG_MMU_MISC_CTRL);
 753
 754         if (devm_request_irq(data->dev, data->irq, mtk_iommu_isr, 0,
 755                              dev_name(data->dev), (void *)data)) {
 756                 writel_relaxed(0, data->base + REG_MMU_PT_BASE_ADDR);
 757                 dev_err(data->dev, "Failed @ IRQ-%d Request\n", data->irq);
 758                 return -ENODEV;
 759         }
 760
 761         return 0;
 762 }
 763
 764 static const struct component_master_ops mtk_iommu_com_ops = {
 765         .bind           = mtk_iommu_bind,
 766         .unbind         = mtk_iommu_unbind,
 767 };
 768
 769 static int mtk_iommu_probe(struct platform_device *pdev)
 770 {
 771         struct mtk_iommu_data   *data;
 772         struct device           *dev = &pdev->dev;
 773         struct device_node      *larbnode, *smicomm_node;
 774         struct platform_device  *plarbdev;
 775         struct device_link      *link;
 776         struct resource         *res;
 777         resource_size_t         ioaddr;
 778         struct component_match  *match = NULL;
 779         struct regmap           *infracfg;
 780         void                    *protect;
 781         int                     i, larb_nr, ret;
 782         u32                     val;
 783         char                    *p;
 784
 785         data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 786         if (!data)
 787                 return -ENOMEM;
 788         data->dev = dev;
 789         data->plat_data = of_device_get_match_data(dev);
 790
 791         /* Protect memory. HW will access here while translation fault.*/
 792         protect = devm_kzalloc(dev, MTK_PROTECT_PA_ALIGN * 2, GFP_KERNEL);
 793         if (!protect)
 794                 return -ENOMEM;
 795         data->protect_base = ALIGN(virt_to_phys(protect), MTK_PROTECT_PA_ALIGN);
 796
 797         if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_4GB_MODE)) {
 798                 switch (data->plat_data->m4u_plat) {
 799                 case M4U_MT2712:
 800                         p = "mediatek,mt2712-infracfg";
 801                         break;
 802                 case M4U_MT8173:
 803                         p = "mediatek,mt8173-infracfg";
 804                         break;
 805                 default:
 806                         p = NULL;
 807                 }
 808
 809                 infracfg = syscon_regmap_lookup_by_compatible(p);
 810
 811                 if (IS_ERR(infracfg))
 812                         return PTR_ERR(infracfg);
 813
 814                 ret = regmap_read(infracfg, REG_INFRA_MISC, &val);
 815                 if (ret)
 816                         return ret;
 817                 data->enable_4GB = !!(val & F_DDR_4GB_SUPPORT_EN);
 818         }
 819
 820         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 821         data->base = devm_ioremap_resource(dev, res);
 822         if (IS_ERR(data->base))
 823                 return PTR_ERR(data->base);
 824         ioaddr = res->start;
 825
 826         data->irq = platform_get_irq(pdev, 0);
 827         if (data->irq < 0)
 828                 return data->irq;
 829
 830         if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_BCLK)) {
 831                 data->bclk = devm_clk_get(dev, "bclk");
 832                 if (IS_ERR(data->bclk))
 833                         return PTR_ERR(data->bclk);
 834         }
 835
 836         larb_nr = of_count_phandle_with_args(dev->of_node,
 837                                              "mediatek,larbs", NULL);
 838         if (larb_nr < 0)
 839                 return larb_nr;
 840
 841         for (i = 0; i < larb_nr; i++) {
 842                 u32 id;
 843
 844                 larbnode = of_parse_phandle(dev->of_node, "mediatek,larbs", i);
 845                 if (!larbnode)
 846                         return -EINVAL;
 847
 848                 if (!of_device_is_available(larbnode)) {
 849                         of_node_put(larbnode);
 850                         continue;
 851                 }
 852
 853                 ret = of_property_read_u32(larbnode, "mediatek,larb-id", &id);
 854                 if (ret)/* The id is consecutive if there is no this property */
 855                         id = i;
 856
 857                 plarbdev = of_find_device_by_node(larbnode);
 858                 if (!plarbdev) {
 859                         of_node_put(larbnode);
 860                         return -EPROBE_DEFER;
 861                 }
 862                 data->larb_imu[id].dev = &plarbdev->dev;
 863
 864                 component_match_add_release(dev, &match, release_of,
 865                                             compare_of, larbnode);
 866         }
 867
 868         /* Get smi-common dev from the last larb. */
 869         smicomm_node = of_parse_phandle(larbnode, "mediatek,smi", 0);
 870         if (!smicomm_node)
 871                 return -EINVAL;
 872
 873         plarbdev = of_find_device_by_node(smicomm_node);
 874         of_node_put(smicomm_node);
 875         data->smicomm_dev = &plarbdev->dev;
 876
 877         pm_runtime_enable(dev);
 878
 879         link = device_link_add(data->smicomm_dev, dev,
 880                         DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME);
 881         if (!link) {
 882                 dev_err(dev, "Unable to link %s.\n", dev_name(data->smicomm_dev));
 883                 ret = -EINVAL;
 884                 goto out_runtime_disable;
 885         }
 886
 887         platform_set_drvdata(pdev, data);
 888
 889         ret = iommu_device_sysfs_add(&data->iommu, dev, NULL,
 890                                      "mtk-iommu.%pa", &ioaddr);
 891         if (ret)
 892                 goto out_link_remove;
 893
 894         ret = iommu_device_register(&data->iommu, &mtk_iommu_ops, dev);
 895         if (ret)
 896                 goto out_sysfs_remove;
 897
 898         spin_lock_init(&data->tlb_lock);
 899         list_add_tail(&data->list, &m4ulist);
 900
 901         if (!iommu_present(&platform_bus_type)) {
 902                 ret = bus_set_iommu(&platform_bus_type, &mtk_iommu_ops);
 903                 if (ret)
 904                         goto out_list_del;
 905         }
 906
 907         ret = component_master_add_with_match(dev, &mtk_iommu_com_ops, match);
 908         if (ret)
 909                 goto out_bus_set_null;
 910         return ret;
 911
 912 out_bus_set_null:
 913         bus_set_iommu(&platform_bus_type, NULL);
 914 out_list_del:
 915         list_del(&data->list);
 916         iommu_device_unregister(&data->iommu);
 917 out_sysfs_remove:
 918         iommu_device_sysfs_remove(&data->iommu);
 919 out_link_remove:
 920         device_link_remove(data->smicomm_dev, dev);
 921 out_runtime_disable:
 922         pm_runtime_disable(dev);
 923         return ret;
 924 }
 925
 926 static int mtk_iommu_remove(struct platform_device *pdev)
 927 {
 928         struct mtk_iommu_data *data = platform_get_drvdata(pdev);
 929
 930         iommu_device_sysfs_remove(&data->iommu);
 931         iommu_device_unregister(&data->iommu);
 932
 933         if (iommu_present(&platform_bus_type))
 934                 bus_set_iommu(&platform_bus_type, NULL);
 935
 936         clk_disable_unprepare(data->bclk);
 937         device_link_remove(data->smicomm_dev, &pdev->dev);
 938         pm_runtime_disable(&pdev->dev);
 939         devm_free_irq(&pdev->dev, data->irq, data);
 940         component_master_del(&pdev->dev, &mtk_iommu_com_ops);
 941         return 0;
 942 }
 943
 944 static int __maybe_unused mtk_iommu_runtime_suspend(struct device *dev)
 945 {
 946         struct mtk_iommu_data *data = dev_get_drvdata(dev);
 947         struct mtk_iommu_suspend_reg *reg = &data->reg;
 948         void __iomem *base = data->base;
 949
 950         reg->wr_len_ctrl = readl_relaxed(base + REG_MMU_WR_LEN_CTRL);
 951         reg->misc_ctrl = readl_relaxed(base + REG_MMU_MISC_CTRL);
 952         reg->dcm_dis = readl_relaxed(base + REG_MMU_DCM_DIS);
 953         reg->ctrl_reg = readl_relaxed(base + REG_MMU_CTRL_REG);
 954         reg->int_control0 = readl_relaxed(base + REG_MMU_INT_CONTROL0);
 955         reg->int_main_control = readl_relaxed(base + REG_MMU_INT_MAIN_CONTROL);
 956         reg->ivrp_paddr = readl_relaxed(base + REG_MMU_IVRP_PADDR);
 957         reg->vld_pa_rng = readl_relaxed(base + REG_MMU_VLD_PA_RNG);
 958         clk_disable_unprepare(data->bclk);
 959         return 0;
 960 }
 961
 962 static int __maybe_unused mtk_iommu_runtime_resume(struct device *dev)
 963 {
 964         struct mtk_iommu_data *data = dev_get_drvdata(dev);
 965         struct mtk_iommu_suspend_reg *reg = &data->reg;
 966         struct mtk_iommu_domain *m4u_dom = data->m4u_dom;
 967         void __iomem *base = data->base;
 968         int ret;
 969
 970         ret = clk_prepare_enable(data->bclk);
 971         if (ret) {
 972                 dev_err(data->dev, "Failed to enable clk(%d) in resume\n", ret);
 973                 return ret;
 974         }
 975
 976         /*
 977          * Uppon first resume, only enable the clk and return, since the values of the
 978          * registers are not yet set.
 979          */
 980         if (!m4u_dom)
 981                 return 0;
 982
 983         writel_relaxed(reg->wr_len_ctrl, base + REG_MMU_WR_LEN_CTRL);
 984         writel_relaxed(reg->misc_ctrl, base + REG_MMU_MISC_CTRL);
 985         writel_relaxed(reg->dcm_dis, base + REG_MMU_DCM_DIS);
 986         writel_relaxed(reg->ctrl_reg, base + REG_MMU_CTRL_REG);
 987         writel_relaxed(reg->int_control0, base + REG_MMU_INT_CONTROL0);
 988         writel_relaxed(reg->int_main_control, base + REG_MMU_INT_MAIN_CONTROL);
 989         writel_relaxed(reg->ivrp_paddr, base + REG_MMU_IVRP_PADDR);
 990         writel_relaxed(reg->vld_pa_rng, base + REG_MMU_VLD_PA_RNG);
 991         writel(m4u_dom->cfg.arm_v7s_cfg.ttbr & MMU_PT_ADDR_MASK, base + REG_MMU_PT_BASE_ADDR);
 992         return 0;
 993 }
 994
 995 static const struct dev_pm_ops mtk_iommu_pm_ops = {
 996         SET_RUNTIME_PM_OPS(mtk_iommu_runtime_suspend, mtk_iommu_runtime_resume, NULL)
 997         SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
 998                                      pm_runtime_force_resume)
 999 };
1000
1001 static const struct mtk_iommu_plat_data mt2712_data = {
1002         .m4u_plat     = M4U_MT2712,
1003         .flags        = HAS_4GB_MODE | HAS_BCLK | HAS_VLD_PA_RNG,
1004         .inv_sel_reg  = REG_MMU_INV_SEL_GEN1,
1005         .iova_region  = single_domain,
1006         .iova_region_nr = ARRAY_SIZE(single_domain),
1007         .larbid_remap = {{0}, {1}, {2}, {3}, {4}, {5}, {6}, {7}},
1008 };
1009
1010 static const struct mtk_iommu_plat_data mt6779_data = {
1011         .m4u_plat      = M4U_MT6779,
1012         .flags         = HAS_SUB_COMM | OUT_ORDER_WR_EN | WR_THROT_EN,
1013         .inv_sel_reg   = REG_MMU_INV_SEL_GEN2,
1014         .iova_region   = single_domain,
1015         .iova_region_nr = ARRAY_SIZE(single_domain),
1016         .larbid_remap  = {{0}, {1}, {2}, {3}, {5}, {7, 8}, {10}, {9}},
1017 };
1018
1019 static const struct mtk_iommu_plat_data mt8167_data = {
1020         .m4u_plat     = M4U_MT8167,
1021         .flags        = RESET_AXI | HAS_LEGACY_IVRP_PADDR,
1022         .inv_sel_reg  = REG_MMU_INV_SEL_GEN1,
1023         .iova_region  = single_domain,
1024         .iova_region_nr = ARRAY_SIZE(single_domain),
1025         .larbid_remap = {{0}, {1}, {2}}, /* Linear mapping. */
1026 };
1027
1028 static const struct mtk_iommu_plat_data mt8173_data = {
1029         .m4u_plat     = M4U_MT8173,
1030         .flags        = HAS_4GB_MODE | HAS_BCLK | RESET_AXI |
1031                         HAS_LEGACY_IVRP_PADDR,
1032         .inv_sel_reg  = REG_MMU_INV_SEL_GEN1,
1033         .iova_region  = single_domain,
1034         .iova_region_nr = ARRAY_SIZE(single_domain),
1035         .larbid_remap = {{0}, {1}, {2}, {3}, {4}, {5}}, /* Linear mapping. */
1036 };
1037
1038 static const struct mtk_iommu_plat_data mt8183_data = {
1039         .m4u_plat     = M4U_MT8183,
1040         .flags        = RESET_AXI,
1041         .inv_sel_reg  = REG_MMU_INV_SEL_GEN1,
1042         .iova_region  = single_domain,
1043         .iova_region_nr = ARRAY_SIZE(single_domain),
1044         .larbid_remap = {{0}, {4}, {5}, {6}, {7}, {2}, {3}, {1}},
1045 };
1046
1047 static const struct mtk_iommu_plat_data mt8192_data = {
1048         .m4u_plat       = M4U_MT8192,
1049         .flags          = HAS_BCLK | HAS_SUB_COMM | OUT_ORDER_WR_EN |
1050                           WR_THROT_EN | IOVA_34_EN,
1051         .inv_sel_reg    = REG_MMU_INV_SEL_GEN2,
1052         .iova_region    = mt8192_multi_dom,
1053         .iova_region_nr = ARRAY_SIZE(mt8192_multi_dom),
1054         .larbid_remap   = {{0}, {1}, {4, 5}, {7}, {2}, {9, 11, 19, 20},
1055                            {0, 14, 16}, {0, 13, 18, 17}},
1056 };
1057
1058 static const struct of_device_id mtk_iommu_of_ids[] = {
1059         { .compatible = "mediatek,mt2712-m4u", .data = &mt2712_data},
1060         { .compatible = "mediatek,mt6779-m4u", .data = &mt6779_data},
1061         { .compatible = "mediatek,mt8167-m4u", .data = &mt8167_data},
1062         { .compatible = "mediatek,mt8173-m4u", .data = &mt8173_data},
1063         { .compatible = "mediatek,mt8183-m4u", .data = &mt8183_data},
1064         { .compatible = "mediatek,mt8192-m4u", .data = &mt8192_data},
1065         {}
1066 };
1067
1068 static struct platform_driver mtk_iommu_driver = {
1069         .probe  = mtk_iommu_probe,
1070         .remove = mtk_iommu_remove,
1071         .driver = {
1072                 .name = "mtk-iommu",
1073                 .of_match_table = mtk_iommu_of_ids,
1074                 .pm = &mtk_iommu_pm_ops,
1075         }
1076 };
1077 module_platform_driver(mtk_iommu_driver);
1078
1079 MODULE_DESCRIPTION("IOMMU API for MediaTek M4U implementations");
1080 MODULE_LICENSE("GPL v2");