1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2015-2016 MediaTek Inc. 4 * Author: Yong Wu <yong.wu@mediatek.com> 5 */ 6 #include <linux/arm-smccc.h> 7 #include <linux/bitfield.h> 8 #include <linux/bug.h> 9 #include <linux/clk.h> 10 #include <linux/component.h> 11 #include <linux/device.h> 12 #include <linux/err.h> 13 #include <linux/interrupt.h> 14 #include <linux/io.h> 15 #include <linux/iommu.h> 16 #include <linux/iopoll.h> 17 #include <linux/io-pgtable.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/pci.h> 25 #include <linux/platform_device.h> 26 #include <linux/pm_runtime.h> 27 #include <linux/regmap.h> 28 #include <linux/slab.h> 29 #include <linux/spinlock.h> 30 #include <linux/soc/mediatek/infracfg.h> 31 #include <linux/soc/mediatek/mtk_sip_svc.h> 32 #include <asm/barrier.h> 33 #include <soc/mediatek/smi.h> 34 35 #include <dt-bindings/memory/mtk-memory-port.h> 36 37 #define REG_MMU_PT_BASE_ADDR 0x000 38 39 #define REG_MMU_INVALIDATE 0x020 40 #define F_ALL_INVLD 0x2 41 #define F_MMU_INV_RANGE 0x1 42 43 #define REG_MMU_INVLD_START_A 0x024 44 #define REG_MMU_INVLD_END_A 0x028 45 46 #define REG_MMU_INV_SEL_GEN2 0x02c 47 #define REG_MMU_INV_SEL_GEN1 0x038 48 #define F_INVLD_EN0 BIT(0) 49 #define F_INVLD_EN1 BIT(1) 50 51 #define REG_MMU_MISC_CTRL 0x048 52 #define F_MMU_IN_ORDER_WR_EN_MASK (BIT(1) | BIT(17)) 53 #define F_MMU_STANDARD_AXI_MODE_MASK (BIT(3) | BIT(19)) 54 55 #define REG_MMU_DCM_DIS 0x050 56 #define F_MMU_DCM BIT(8) 57 58 #define REG_MMU_WR_LEN_CTRL 0x054 59 #define F_MMU_WR_THROT_DIS_MASK (BIT(5) | BIT(21)) 60 61 #define REG_MMU_CTRL_REG 0x110 62 #define F_MMU_TF_PROT_TO_PROGRAM_ADDR (2 << 4) 63 #define F_MMU_PREFETCH_RT_REPLACE_MOD BIT(4) 64 #define F_MMU_TF_PROT_TO_PROGRAM_ADDR_MT8173 (2 << 5) 65 66 #define REG_MMU_IVRP_PADDR 0x114 67 68 #define REG_MMU_VLD_PA_RNG 0x118 69 #define F_MMU_VLD_PA_RNG(EA, SA) (((EA) << 8) | (SA)) 70 71 #define REG_MMU_INT_CONTROL0 0x120 72 #define F_L2_MULIT_HIT_EN BIT(0) 73 #define F_TABLE_WALK_FAULT_INT_EN BIT(1) 74 #define F_PREETCH_FIFO_OVERFLOW_INT_EN BIT(2) 75 #define F_MISS_FIFO_OVERFLOW_INT_EN BIT(3) 76 #define F_PREFETCH_FIFO_ERR_INT_EN BIT(5) 77 #define F_MISS_FIFO_ERR_INT_EN BIT(6) 78 #define F_INT_CLR_BIT BIT(12) 79 80 #define REG_MMU_INT_MAIN_CONTROL 0x124 81 /* mmu0 | mmu1 */ 82 #define F_INT_TRANSLATION_FAULT (BIT(0) | BIT(7)) 83 #define F_INT_MAIN_MULTI_HIT_FAULT (BIT(1) | BIT(8)) 84 #define F_INT_INVALID_PA_FAULT (BIT(2) | BIT(9)) 85 #define F_INT_ENTRY_REPLACEMENT_FAULT (BIT(3) | BIT(10)) 86 #define F_INT_TLB_MISS_FAULT (BIT(4) | BIT(11)) 87 #define F_INT_MISS_TRANSACTION_FIFO_FAULT (BIT(5) | BIT(12)) 88 #define F_INT_PRETETCH_TRANSATION_FIFO_FAULT (BIT(6) | BIT(13)) 89 90 #define REG_MMU_CPE_DONE 0x12C 91 92 #define REG_MMU_FAULT_ST1 0x134 93 #define F_REG_MMU0_FAULT_MASK GENMASK(6, 0) 94 #define F_REG_MMU1_FAULT_MASK GENMASK(13, 7) 95 96 #define REG_MMU0_FAULT_VA 0x13c 97 #define F_MMU_INVAL_VA_31_12_MASK GENMASK(31, 12) 98 #define F_MMU_INVAL_VA_34_32_MASK GENMASK(11, 9) 99 #define F_MMU_INVAL_PA_34_32_MASK GENMASK(8, 6) 100 #define F_MMU_FAULT_VA_WRITE_BIT BIT(1) 101 #define F_MMU_FAULT_VA_LAYER_BIT BIT(0) 102 103 #define REG_MMU0_INVLD_PA 0x140 104 #define REG_MMU1_FAULT_VA 0x144 105 #define REG_MMU1_INVLD_PA 0x148 106 #define REG_MMU0_INT_ID 0x150 107 #define REG_MMU1_INT_ID 0x154 108 #define F_MMU_INT_ID_COMM_ID(a) (((a) >> 9) & 0x7) 109 #define F_MMU_INT_ID_SUB_COMM_ID(a) (((a) >> 7) & 0x3) 110 #define F_MMU_INT_ID_COMM_ID_EXT(a) (((a) >> 10) & 0x7) 111 #define F_MMU_INT_ID_SUB_COMM_ID_EXT(a) (((a) >> 7) & 0x7) 112 /* Macro for 5 bits length port ID field (default) */ 113 #define F_MMU_INT_ID_LARB_ID(a) (((a) >> 7) & 0x7) 114 #define F_MMU_INT_ID_PORT_ID(a) (((a) >> 2) & 0x1f) 115 /* Macro for 6 bits length port ID field */ 116 #define F_MMU_INT_ID_LARB_ID_WID_6(a) (((a) >> 8) & 0x7) 117 #define F_MMU_INT_ID_PORT_ID_WID_6(a) (((a) >> 2) & 0x3f) 118 119 #define MTK_PROTECT_PA_ALIGN 256 120 #define MTK_IOMMU_BANK_SZ 0x1000 121 122 #define PERICFG_IOMMU_1 0x714 123 124 #define HAS_4GB_MODE BIT(0) 125 /* HW will use the EMI clock if there isn't the "bclk". */ 126 #define HAS_BCLK BIT(1) 127 #define HAS_VLD_PA_RNG BIT(2) 128 #define RESET_AXI BIT(3) 129 #define OUT_ORDER_WR_EN BIT(4) 130 #define HAS_SUB_COMM_2BITS BIT(5) 131 #define HAS_SUB_COMM_3BITS BIT(6) 132 #define WR_THROT_EN BIT(7) 133 #define HAS_LEGACY_IVRP_PADDR BIT(8) 134 #define IOVA_34_EN BIT(9) 135 #define SHARE_PGTABLE BIT(10) /* 2 HW share pgtable */ 136 #define DCM_DISABLE BIT(11) 137 #define STD_AXI_MODE BIT(12) /* For non MM iommu */ 138 /* 2 bits: iommu type */ 139 #define MTK_IOMMU_TYPE_MM (0x0 << 13) 140 #define MTK_IOMMU_TYPE_INFRA (0x1 << 13) 141 #define MTK_IOMMU_TYPE_MASK (0x3 << 13) 142 /* PM and clock always on. e.g. infra iommu */ 143 #define PM_CLK_AO BIT(15) 144 #define IFA_IOMMU_PCIE_SUPPORT BIT(16) 145 #define PGTABLE_PA_35_EN BIT(17) 146 #define TF_PORT_TO_ADDR_MT8173 BIT(18) 147 #define INT_ID_PORT_WIDTH_6 BIT(19) 148 #define CFG_IFA_MASTER_IN_ATF BIT(20) 149 150 #define MTK_IOMMU_HAS_FLAG_MASK(pdata, _x, mask) \ 151 ((((pdata)->flags) & (mask)) == (_x)) 152 153 #define MTK_IOMMU_HAS_FLAG(pdata, _x) MTK_IOMMU_HAS_FLAG_MASK(pdata, _x, _x) 154 #define MTK_IOMMU_IS_TYPE(pdata, _x) MTK_IOMMU_HAS_FLAG_MASK(pdata, _x,\ 155 MTK_IOMMU_TYPE_MASK) 156 157 #define MTK_INVALID_LARBID MTK_LARB_NR_MAX 158 159 #define MTK_LARB_COM_MAX 8 160 #define MTK_LARB_SUBCOM_MAX 8 161 162 #define MTK_IOMMU_GROUP_MAX 8 163 #define MTK_IOMMU_BANK_MAX 5 164 165 enum mtk_iommu_plat { 166 M4U_MT2712, 167 M4U_MT6779, 168 M4U_MT6795, 169 M4U_MT8167, 170 M4U_MT8173, 171 M4U_MT8183, 172 M4U_MT8186, 173 M4U_MT8188, 174 M4U_MT8192, 175 M4U_MT8195, 176 M4U_MT8365, 177 }; 178 179 struct mtk_iommu_iova_region { 180 dma_addr_t iova_base; 181 unsigned long long size; 182 }; 183 184 struct mtk_iommu_suspend_reg { 185 u32 misc_ctrl; 186 u32 dcm_dis; 187 u32 ctrl_reg; 188 u32 vld_pa_rng; 189 u32 wr_len_ctrl; 190 191 u32 int_control[MTK_IOMMU_BANK_MAX]; 192 u32 int_main_control[MTK_IOMMU_BANK_MAX]; 193 u32 ivrp_paddr[MTK_IOMMU_BANK_MAX]; 194 }; 195 196 struct mtk_iommu_plat_data { 197 enum mtk_iommu_plat m4u_plat; 198 u32 flags; 199 u32 inv_sel_reg; 200 201 char *pericfg_comp_str; 202 struct list_head *hw_list; 203 204 /* 205 * The IOMMU HW may support 16GB iova. In order to balance the IOVA ranges, 206 * different masters will be put in different iova ranges, for example vcodec 207 * is in 4G-8G and cam is in 8G-12G. Meanwhile, some masters may have the 208 * special IOVA range requirement, like CCU can only support the address 209 * 0x40000000-0x44000000. 210 * Here list the iova ranges this SoC supports and which larbs/ports are in 211 * which region. 212 * 213 * 16GB iova all use one pgtable, but each a region is a iommu group. 214 */ 215 struct { 216 unsigned int iova_region_nr; 217 const struct mtk_iommu_iova_region *iova_region; 218 /* 219 * Indicate the correspondance between larbs, ports and regions. 220 * 221 * The index is the same as iova_region and larb port numbers are 222 * described as bit positions. 223 * For example, storing BIT(0) at index 2,1 means "larb 1, port0 is in region 2". 224 * [2] = { [1] = BIT(0) } 225 */ 226 const u32 (*iova_region_larb_msk)[MTK_LARB_NR_MAX]; 227 }; 228 229 /* 230 * The IOMMU HW may have 5 banks. Each bank has a independent pgtable. 231 * Here list how many banks this SoC supports/enables and which ports are in which bank. 232 */ 233 struct { 234 u8 banks_num; 235 bool banks_enable[MTK_IOMMU_BANK_MAX]; 236 unsigned int banks_portmsk[MTK_IOMMU_BANK_MAX]; 237 }; 238 239 unsigned char larbid_remap[MTK_LARB_COM_MAX][MTK_LARB_SUBCOM_MAX]; 240 }; 241 242 struct mtk_iommu_bank_data { 243 void __iomem *base; 244 int irq; 245 u8 id; 246 struct device *parent_dev; 247 struct mtk_iommu_data *parent_data; 248 spinlock_t tlb_lock; /* lock for tlb range flush */ 249 struct mtk_iommu_domain *m4u_dom; /* Each bank has a domain */ 250 }; 251 252 struct mtk_iommu_data { 253 struct device *dev; 254 struct clk *bclk; 255 phys_addr_t protect_base; /* protect memory base */ 256 struct mtk_iommu_suspend_reg reg; 257 struct iommu_group *m4u_group[MTK_IOMMU_GROUP_MAX]; 258 bool enable_4GB; 259 260 struct iommu_device iommu; 261 const struct mtk_iommu_plat_data *plat_data; 262 struct device *smicomm_dev; 263 264 struct mtk_iommu_bank_data *bank; 265 struct mtk_iommu_domain *share_dom; /* For 2 HWs share pgtable */ 266 267 struct regmap *pericfg; 268 struct mutex mutex; /* Protect m4u_group/m4u_dom above */ 269 270 /* 271 * In the sharing pgtable case, list data->list to the global list like m4ulist. 272 * In the non-sharing pgtable case, list data->list to the itself hw_list_head. 273 */ 274 struct list_head *hw_list; 275 struct list_head hw_list_head; 276 struct list_head list; 277 struct mtk_smi_larb_iommu larb_imu[MTK_LARB_NR_MAX]; 278 }; 279 280 struct mtk_iommu_domain { 281 struct io_pgtable_cfg cfg; 282 struct io_pgtable_ops *iop; 283 284 struct mtk_iommu_bank_data *bank; 285 struct iommu_domain domain; 286 287 struct mutex mutex; /* Protect "data" in this structure */ 288 }; 289 290 static int mtk_iommu_bind(struct device *dev) 291 { 292 struct mtk_iommu_data *data = dev_get_drvdata(dev); 293 294 return component_bind_all(dev, &data->larb_imu); 295 } 296 297 static void mtk_iommu_unbind(struct device *dev) 298 { 299 struct mtk_iommu_data *data = dev_get_drvdata(dev); 300 301 component_unbind_all(dev, &data->larb_imu); 302 } 303 304 static const struct iommu_ops mtk_iommu_ops; 305 306 static int mtk_iommu_hw_init(const struct mtk_iommu_data *data, unsigned int bankid); 307 308 #define MTK_IOMMU_TLB_ADDR(iova) ({ \ 309 dma_addr_t _addr = iova; \ 310 ((lower_32_bits(_addr) & GENMASK(31, 12)) | upper_32_bits(_addr));\ 311 }) 312 313 /* 314 * In M4U 4GB mode, the physical address is remapped as below: 315 * 316 * CPU Physical address: 317 * ==================== 318 * 319 * 0 1G 2G 3G 4G 5G 320 * |---A---|---B---|---C---|---D---|---E---| 321 * +--I/O--+------------Memory-------------+ 322 * 323 * IOMMU output physical address: 324 * ============================= 325 * 326 * 4G 5G 6G 7G 8G 327 * |---E---|---B---|---C---|---D---| 328 * +------------Memory-------------+ 329 * 330 * The Region 'A'(I/O) can NOT be mapped by M4U; For Region 'B'/'C'/'D', the 331 * bit32 of the CPU physical address always is needed to set, and for Region 332 * 'E', the CPU physical address keep as is. 333 * Additionally, The iommu consumers always use the CPU phyiscal address. 334 */ 335 #define MTK_IOMMU_4GB_MODE_REMAP_BASE 0x140000000UL 336 337 static LIST_HEAD(m4ulist); /* List all the M4U HWs */ 338 339 #define for_each_m4u(data, head) list_for_each_entry(data, head, list) 340 341 #define MTK_IOMMU_IOVA_SZ_4G (SZ_4G - SZ_8M) /* 8M as gap */ 342 343 static const struct mtk_iommu_iova_region single_domain[] = { 344 {.iova_base = 0, .size = MTK_IOMMU_IOVA_SZ_4G}, 345 }; 346 347 #define MT8192_MULTI_REGION_NR_MAX 6 348 349 #define MT8192_MULTI_REGION_NR (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT) ? \ 350 MT8192_MULTI_REGION_NR_MAX : 1) 351 352 static const struct mtk_iommu_iova_region mt8192_multi_dom[MT8192_MULTI_REGION_NR] = { 353 { .iova_base = 0x0, .size = MTK_IOMMU_IOVA_SZ_4G}, /* 0 ~ 4G, */ 354 #if IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT) 355 { .iova_base = SZ_4G, .size = MTK_IOMMU_IOVA_SZ_4G}, /* 4G ~ 8G */ 356 { .iova_base = SZ_4G * 2, .size = MTK_IOMMU_IOVA_SZ_4G}, /* 8G ~ 12G */ 357 { .iova_base = SZ_4G * 3, .size = MTK_IOMMU_IOVA_SZ_4G}, /* 12G ~ 16G */ 358 359 { .iova_base = 0x240000000ULL, .size = 0x4000000}, /* CCU0 */ 360 { .iova_base = 0x244000000ULL, .size = 0x4000000}, /* CCU1 */ 361 #endif 362 }; 363 364 /* If 2 M4U share a domain(use the same hwlist), Put the corresponding info in first data.*/ 365 static struct mtk_iommu_data *mtk_iommu_get_frst_data(struct list_head *hwlist) 366 { 367 return list_first_entry(hwlist, struct mtk_iommu_data, list); 368 } 369 370 static struct mtk_iommu_domain *to_mtk_domain(struct iommu_domain *dom) 371 { 372 return container_of(dom, struct mtk_iommu_domain, domain); 373 } 374 375 static void mtk_iommu_tlb_flush_all(struct mtk_iommu_data *data) 376 { 377 /* Tlb flush all always is in bank0. */ 378 struct mtk_iommu_bank_data *bank = &data->bank[0]; 379 void __iomem *base = bank->base; 380 unsigned long flags; 381 382 spin_lock_irqsave(&bank->tlb_lock, flags); 383 writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0, base + data->plat_data->inv_sel_reg); 384 writel_relaxed(F_ALL_INVLD, base + REG_MMU_INVALIDATE); 385 wmb(); /* Make sure the tlb flush all done */ 386 spin_unlock_irqrestore(&bank->tlb_lock, flags); 387 } 388 389 static void mtk_iommu_tlb_flush_range_sync(unsigned long iova, size_t size, 390 struct mtk_iommu_bank_data *bank) 391 { 392 struct list_head *head = bank->parent_data->hw_list; 393 struct mtk_iommu_bank_data *curbank; 394 struct mtk_iommu_data *data; 395 bool check_pm_status; 396 unsigned long flags; 397 void __iomem *base; 398 int ret; 399 u32 tmp; 400 401 for_each_m4u(data, head) { 402 /* 403 * To avoid resume the iommu device frequently when the iommu device 404 * is not active, it doesn't always call pm_runtime_get here, then tlb 405 * flush depends on the tlb flush all in the runtime resume. 406 * 407 * There are 2 special cases: 408 * 409 * Case1: The iommu dev doesn't have power domain but has bclk. This case 410 * should also avoid the tlb flush while the dev is not active to mute 411 * the tlb timeout log. like mt8173. 412 * 413 * Case2: The power/clock of infra iommu is always on, and it doesn't 414 * have the device link with the master devices. This case should avoid 415 * the PM status check. 416 */ 417 check_pm_status = !MTK_IOMMU_HAS_FLAG(data->plat_data, PM_CLK_AO); 418 419 if (check_pm_status) { 420 if (pm_runtime_get_if_in_use(data->dev) <= 0) 421 continue; 422 } 423 424 curbank = &data->bank[bank->id]; 425 base = curbank->base; 426 427 spin_lock_irqsave(&curbank->tlb_lock, flags); 428 writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0, 429 base + data->plat_data->inv_sel_reg); 430 431 writel_relaxed(MTK_IOMMU_TLB_ADDR(iova), base + REG_MMU_INVLD_START_A); 432 writel_relaxed(MTK_IOMMU_TLB_ADDR(iova + size - 1), 433 base + REG_MMU_INVLD_END_A); 434 writel_relaxed(F_MMU_INV_RANGE, base + REG_MMU_INVALIDATE); 435 436 /* tlb sync */ 437 ret = readl_poll_timeout_atomic(base + REG_MMU_CPE_DONE, 438 tmp, tmp != 0, 10, 1000); 439 440 /* Clear the CPE status */ 441 writel_relaxed(0, base + REG_MMU_CPE_DONE); 442 spin_unlock_irqrestore(&curbank->tlb_lock, flags); 443 444 if (ret) { 445 dev_warn(data->dev, 446 "Partial TLB flush timed out, falling back to full flush\n"); 447 mtk_iommu_tlb_flush_all(data); 448 } 449 450 if (check_pm_status) 451 pm_runtime_put(data->dev); 452 } 453 } 454 455 static irqreturn_t mtk_iommu_isr(int irq, void *dev_id) 456 { 457 struct mtk_iommu_bank_data *bank = dev_id; 458 struct mtk_iommu_data *data = bank->parent_data; 459 struct mtk_iommu_domain *dom = bank->m4u_dom; 460 unsigned int fault_larb = MTK_INVALID_LARBID, fault_port = 0, sub_comm = 0; 461 u32 int_state, regval, va34_32, pa34_32; 462 const struct mtk_iommu_plat_data *plat_data = data->plat_data; 463 void __iomem *base = bank->base; 464 u64 fault_iova, fault_pa; 465 bool layer, write; 466 467 /* Read error info from registers */ 468 int_state = readl_relaxed(base + REG_MMU_FAULT_ST1); 469 if (int_state & F_REG_MMU0_FAULT_MASK) { 470 regval = readl_relaxed(base + REG_MMU0_INT_ID); 471 fault_iova = readl_relaxed(base + REG_MMU0_FAULT_VA); 472 fault_pa = readl_relaxed(base + REG_MMU0_INVLD_PA); 473 } else { 474 regval = readl_relaxed(base + REG_MMU1_INT_ID); 475 fault_iova = readl_relaxed(base + REG_MMU1_FAULT_VA); 476 fault_pa = readl_relaxed(base + REG_MMU1_INVLD_PA); 477 } 478 layer = fault_iova & F_MMU_FAULT_VA_LAYER_BIT; 479 write = fault_iova & F_MMU_FAULT_VA_WRITE_BIT; 480 if (MTK_IOMMU_HAS_FLAG(plat_data, IOVA_34_EN)) { 481 va34_32 = FIELD_GET(F_MMU_INVAL_VA_34_32_MASK, fault_iova); 482 fault_iova = fault_iova & F_MMU_INVAL_VA_31_12_MASK; 483 fault_iova |= (u64)va34_32 << 32; 484 } 485 pa34_32 = FIELD_GET(F_MMU_INVAL_PA_34_32_MASK, fault_iova); 486 fault_pa |= (u64)pa34_32 << 32; 487 488 if (MTK_IOMMU_IS_TYPE(plat_data, MTK_IOMMU_TYPE_MM)) { 489 if (MTK_IOMMU_HAS_FLAG(plat_data, HAS_SUB_COMM_2BITS)) { 490 fault_larb = F_MMU_INT_ID_COMM_ID(regval); 491 sub_comm = F_MMU_INT_ID_SUB_COMM_ID(regval); 492 fault_port = F_MMU_INT_ID_PORT_ID(regval); 493 } else if (MTK_IOMMU_HAS_FLAG(plat_data, HAS_SUB_COMM_3BITS)) { 494 fault_larb = F_MMU_INT_ID_COMM_ID_EXT(regval); 495 sub_comm = F_MMU_INT_ID_SUB_COMM_ID_EXT(regval); 496 fault_port = F_MMU_INT_ID_PORT_ID(regval); 497 } else if (MTK_IOMMU_HAS_FLAG(plat_data, INT_ID_PORT_WIDTH_6)) { 498 fault_port = F_MMU_INT_ID_PORT_ID_WID_6(regval); 499 fault_larb = F_MMU_INT_ID_LARB_ID_WID_6(regval); 500 } else { 501 fault_port = F_MMU_INT_ID_PORT_ID(regval); 502 fault_larb = F_MMU_INT_ID_LARB_ID(regval); 503 } 504 fault_larb = data->plat_data->larbid_remap[fault_larb][sub_comm]; 505 } 506 507 if (!dom || report_iommu_fault(&dom->domain, bank->parent_dev, fault_iova, 508 write ? IOMMU_FAULT_WRITE : IOMMU_FAULT_READ)) { 509 dev_err_ratelimited( 510 bank->parent_dev, 511 "fault type=0x%x iova=0x%llx pa=0x%llx master=0x%x(larb=%d port=%d) layer=%d %s\n", 512 int_state, fault_iova, fault_pa, regval, fault_larb, fault_port, 513 layer, write ? "write" : "read"); 514 } 515 516 /* Interrupt clear */ 517 regval = readl_relaxed(base + REG_MMU_INT_CONTROL0); 518 regval |= F_INT_CLR_BIT; 519 writel_relaxed(regval, base + REG_MMU_INT_CONTROL0); 520 521 mtk_iommu_tlb_flush_all(data); 522 523 return IRQ_HANDLED; 524 } 525 526 static unsigned int mtk_iommu_get_bank_id(struct device *dev, 527 const struct mtk_iommu_plat_data *plat_data) 528 { 529 struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); 530 unsigned int i, portmsk = 0, bankid = 0; 531 532 if (plat_data->banks_num == 1) 533 return bankid; 534 535 for (i = 0; i < fwspec->num_ids; i++) 536 portmsk |= BIT(MTK_M4U_TO_PORT(fwspec->ids[i])); 537 538 for (i = 0; i < plat_data->banks_num && i < MTK_IOMMU_BANK_MAX; i++) { 539 if (!plat_data->banks_enable[i]) 540 continue; 541 542 if (portmsk & plat_data->banks_portmsk[i]) { 543 bankid = i; 544 break; 545 } 546 } 547 return bankid; /* default is 0 */ 548 } 549 550 static int mtk_iommu_get_iova_region_id(struct device *dev, 551 const struct mtk_iommu_plat_data *plat_data) 552 { 553 struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); 554 unsigned int portidmsk = 0, larbid; 555 const u32 *rgn_larb_msk; 556 int i; 557 558 if (plat_data->iova_region_nr == 1) 559 return 0; 560 561 larbid = MTK_M4U_TO_LARB(fwspec->ids[0]); 562 for (i = 0; i < fwspec->num_ids; i++) 563 portidmsk |= BIT(MTK_M4U_TO_PORT(fwspec->ids[i])); 564 565 for (i = 0; i < plat_data->iova_region_nr; i++) { 566 rgn_larb_msk = plat_data->iova_region_larb_msk[i]; 567 if (!rgn_larb_msk) 568 continue; 569 570 if ((rgn_larb_msk[larbid] & portidmsk) == portidmsk) 571 return i; 572 } 573 574 dev_err(dev, "Can NOT find the region for larb(%d-%x).\n", 575 larbid, portidmsk); 576 return -EINVAL; 577 } 578 579 static int mtk_iommu_config(struct mtk_iommu_data *data, struct device *dev, 580 bool enable, unsigned int regionid) 581 { 582 struct mtk_smi_larb_iommu *larb_mmu; 583 unsigned int larbid, portid; 584 struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); 585 const struct mtk_iommu_iova_region *region; 586 unsigned long portid_msk = 0; 587 struct arm_smccc_res res; 588 int i, ret = 0; 589 590 for (i = 0; i < fwspec->num_ids; ++i) { 591 portid = MTK_M4U_TO_PORT(fwspec->ids[i]); 592 portid_msk |= BIT(portid); 593 } 594 595 if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) { 596 /* All ports should be in the same larb. just use 0 here */ 597 larbid = MTK_M4U_TO_LARB(fwspec->ids[0]); 598 larb_mmu = &data->larb_imu[larbid]; 599 region = data->plat_data->iova_region + regionid; 600 601 for_each_set_bit(portid, &portid_msk, 32) 602 larb_mmu->bank[portid] = upper_32_bits(region->iova_base); 603 604 dev_dbg(dev, "%s iommu for larb(%s) port 0x%lx region %d rgn-bank %d.\n", 605 enable ? "enable" : "disable", dev_name(larb_mmu->dev), 606 portid_msk, regionid, upper_32_bits(region->iova_base)); 607 608 if (enable) 609 larb_mmu->mmu |= portid_msk; 610 else 611 larb_mmu->mmu &= ~portid_msk; 612 } else if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_INFRA)) { 613 if (MTK_IOMMU_HAS_FLAG(data->plat_data, CFG_IFA_MASTER_IN_ATF)) { 614 arm_smccc_smc(MTK_SIP_KERNEL_IOMMU_CONTROL, 615 IOMMU_ATF_CMD_CONFIG_INFRA_IOMMU, 616 portid_msk, enable, 0, 0, 0, 0, &res); 617 ret = res.a0; 618 } else { 619 /* PCI dev has only one output id, enable the next writing bit for PCIe */ 620 if (dev_is_pci(dev)) { 621 if (fwspec->num_ids != 1) { 622 dev_err(dev, "PCI dev can only have one port.\n"); 623 return -ENODEV; 624 } 625 portid_msk |= BIT(portid + 1); 626 } 627 628 ret = regmap_update_bits(data->pericfg, PERICFG_IOMMU_1, 629 (u32)portid_msk, enable ? (u32)portid_msk : 0); 630 } 631 if (ret) 632 dev_err(dev, "%s iommu(%s) inframaster 0x%lx fail(%d).\n", 633 enable ? "enable" : "disable", 634 dev_name(data->dev), portid_msk, ret); 635 } 636 return ret; 637 } 638 639 static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom, 640 struct mtk_iommu_data *data, 641 unsigned int region_id) 642 { 643 struct mtk_iommu_domain *share_dom = data->share_dom; 644 const struct mtk_iommu_iova_region *region; 645 646 /* Always use share domain in sharing pgtable case */ 647 if (MTK_IOMMU_HAS_FLAG(data->plat_data, SHARE_PGTABLE) && share_dom) { 648 dom->iop = share_dom->iop; 649 dom->cfg = share_dom->cfg; 650 dom->domain.pgsize_bitmap = share_dom->cfg.pgsize_bitmap; 651 goto update_iova_region; 652 } 653 654 dom->cfg = (struct io_pgtable_cfg) { 655 .quirks = IO_PGTABLE_QUIRK_ARM_NS | 656 IO_PGTABLE_QUIRK_NO_PERMS | 657 IO_PGTABLE_QUIRK_ARM_MTK_EXT, 658 .pgsize_bitmap = mtk_iommu_ops.pgsize_bitmap, 659 .ias = MTK_IOMMU_HAS_FLAG(data->plat_data, IOVA_34_EN) ? 34 : 32, 660 .iommu_dev = data->dev, 661 }; 662 663 if (MTK_IOMMU_HAS_FLAG(data->plat_data, PGTABLE_PA_35_EN)) 664 dom->cfg.quirks |= IO_PGTABLE_QUIRK_ARM_MTK_TTBR_EXT; 665 666 if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_4GB_MODE)) 667 dom->cfg.oas = data->enable_4GB ? 33 : 32; 668 else 669 dom->cfg.oas = 35; 670 671 dom->iop = alloc_io_pgtable_ops(ARM_V7S, &dom->cfg, data); 672 if (!dom->iop) { 673 dev_err(data->dev, "Failed to alloc io pgtable\n"); 674 return -ENOMEM; 675 } 676 677 /* Update our support page sizes bitmap */ 678 dom->domain.pgsize_bitmap = dom->cfg.pgsize_bitmap; 679 680 if (MTK_IOMMU_HAS_FLAG(data->plat_data, SHARE_PGTABLE)) 681 data->share_dom = dom; 682 683 update_iova_region: 684 /* Update the iova region for this domain */ 685 region = data->plat_data->iova_region + region_id; 686 dom->domain.geometry.aperture_start = region->iova_base; 687 dom->domain.geometry.aperture_end = region->iova_base + region->size - 1; 688 dom->domain.geometry.force_aperture = true; 689 return 0; 690 } 691 692 static struct iommu_domain *mtk_iommu_domain_alloc(unsigned type) 693 { 694 struct mtk_iommu_domain *dom; 695 696 if (type != IOMMU_DOMAIN_DMA && type != IOMMU_DOMAIN_UNMANAGED) 697 return NULL; 698 699 dom = kzalloc(sizeof(*dom), GFP_KERNEL); 700 if (!dom) 701 return NULL; 702 mutex_init(&dom->mutex); 703 704 return &dom->domain; 705 } 706 707 static void mtk_iommu_domain_free(struct iommu_domain *domain) 708 { 709 kfree(to_mtk_domain(domain)); 710 } 711 712 static int mtk_iommu_attach_device(struct iommu_domain *domain, 713 struct device *dev) 714 { 715 struct mtk_iommu_data *data = dev_iommu_priv_get(dev), *frstdata; 716 struct mtk_iommu_domain *dom = to_mtk_domain(domain); 717 struct list_head *hw_list = data->hw_list; 718 struct device *m4udev = data->dev; 719 struct mtk_iommu_bank_data *bank; 720 unsigned int bankid; 721 int ret, region_id; 722 723 region_id = mtk_iommu_get_iova_region_id(dev, data->plat_data); 724 if (region_id < 0) 725 return region_id; 726 727 bankid = mtk_iommu_get_bank_id(dev, data->plat_data); 728 mutex_lock(&dom->mutex); 729 if (!dom->bank) { 730 /* Data is in the frstdata in sharing pgtable case. */ 731 frstdata = mtk_iommu_get_frst_data(hw_list); 732 733 mutex_lock(&frstdata->mutex); 734 ret = mtk_iommu_domain_finalise(dom, frstdata, region_id); 735 mutex_unlock(&frstdata->mutex); 736 if (ret) { 737 mutex_unlock(&dom->mutex); 738 return ret; 739 } 740 dom->bank = &data->bank[bankid]; 741 } 742 mutex_unlock(&dom->mutex); 743 744 mutex_lock(&data->mutex); 745 bank = &data->bank[bankid]; 746 if (!bank->m4u_dom) { /* Initialize the M4U HW for each a BANK */ 747 ret = pm_runtime_resume_and_get(m4udev); 748 if (ret < 0) { 749 dev_err(m4udev, "pm get fail(%d) in attach.\n", ret); 750 goto err_unlock; 751 } 752 753 ret = mtk_iommu_hw_init(data, bankid); 754 if (ret) { 755 pm_runtime_put(m4udev); 756 goto err_unlock; 757 } 758 bank->m4u_dom = dom; 759 writel(dom->cfg.arm_v7s_cfg.ttbr, bank->base + REG_MMU_PT_BASE_ADDR); 760 761 pm_runtime_put(m4udev); 762 } 763 mutex_unlock(&data->mutex); 764 765 if (region_id > 0) { 766 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(34)); 767 if (ret) { 768 dev_err(m4udev, "Failed to set dma_mask for %s(%d).\n", dev_name(dev), ret); 769 return ret; 770 } 771 } 772 773 return mtk_iommu_config(data, dev, true, region_id); 774 775 err_unlock: 776 mutex_unlock(&data->mutex); 777 return ret; 778 } 779 780 static int mtk_iommu_map(struct iommu_domain *domain, unsigned long iova, 781 phys_addr_t paddr, size_t pgsize, size_t pgcount, 782 int prot, gfp_t gfp, size_t *mapped) 783 { 784 struct mtk_iommu_domain *dom = to_mtk_domain(domain); 785 786 /* The "4GB mode" M4U physically can not use the lower remap of Dram. */ 787 if (dom->bank->parent_data->enable_4GB) 788 paddr |= BIT_ULL(32); 789 790 /* Synchronize with the tlb_lock */ 791 return dom->iop->map_pages(dom->iop, iova, paddr, pgsize, pgcount, prot, gfp, mapped); 792 } 793 794 static size_t mtk_iommu_unmap(struct iommu_domain *domain, 795 unsigned long iova, size_t pgsize, size_t pgcount, 796 struct iommu_iotlb_gather *gather) 797 { 798 struct mtk_iommu_domain *dom = to_mtk_domain(domain); 799 800 iommu_iotlb_gather_add_range(gather, iova, pgsize * pgcount); 801 return dom->iop->unmap_pages(dom->iop, iova, pgsize, pgcount, gather); 802 } 803 804 static void mtk_iommu_flush_iotlb_all(struct iommu_domain *domain) 805 { 806 struct mtk_iommu_domain *dom = to_mtk_domain(domain); 807 808 if (dom->bank) 809 mtk_iommu_tlb_flush_all(dom->bank->parent_data); 810 } 811 812 static void mtk_iommu_iotlb_sync(struct iommu_domain *domain, 813 struct iommu_iotlb_gather *gather) 814 { 815 struct mtk_iommu_domain *dom = to_mtk_domain(domain); 816 size_t length = gather->end - gather->start + 1; 817 818 mtk_iommu_tlb_flush_range_sync(gather->start, length, dom->bank); 819 } 820 821 static void mtk_iommu_sync_map(struct iommu_domain *domain, unsigned long iova, 822 size_t size) 823 { 824 struct mtk_iommu_domain *dom = to_mtk_domain(domain); 825 826 mtk_iommu_tlb_flush_range_sync(iova, size, dom->bank); 827 } 828 829 static phys_addr_t mtk_iommu_iova_to_phys(struct iommu_domain *domain, 830 dma_addr_t iova) 831 { 832 struct mtk_iommu_domain *dom = to_mtk_domain(domain); 833 phys_addr_t pa; 834 835 pa = dom->iop->iova_to_phys(dom->iop, iova); 836 if (IS_ENABLED(CONFIG_PHYS_ADDR_T_64BIT) && 837 dom->bank->parent_data->enable_4GB && 838 pa >= MTK_IOMMU_4GB_MODE_REMAP_BASE) 839 pa &= ~BIT_ULL(32); 840 841 return pa; 842 } 843 844 static struct iommu_device *mtk_iommu_probe_device(struct device *dev) 845 { 846 struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); 847 struct mtk_iommu_data *data; 848 struct device_link *link; 849 struct device *larbdev; 850 unsigned int larbid, larbidx, i; 851 852 if (!fwspec || fwspec->ops != &mtk_iommu_ops) 853 return ERR_PTR(-ENODEV); /* Not a iommu client device */ 854 855 data = dev_iommu_priv_get(dev); 856 857 if (!MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) 858 return &data->iommu; 859 860 /* 861 * Link the consumer device with the smi-larb device(supplier). 862 * The device that connects with each a larb is a independent HW. 863 * All the ports in each a device should be in the same larbs. 864 */ 865 larbid = MTK_M4U_TO_LARB(fwspec->ids[0]); 866 if (larbid >= MTK_LARB_NR_MAX) 867 return ERR_PTR(-EINVAL); 868 869 for (i = 1; i < fwspec->num_ids; i++) { 870 larbidx = MTK_M4U_TO_LARB(fwspec->ids[i]); 871 if (larbid != larbidx) { 872 dev_err(dev, "Can only use one larb. Fail@larb%d-%d.\n", 873 larbid, larbidx); 874 return ERR_PTR(-EINVAL); 875 } 876 } 877 larbdev = data->larb_imu[larbid].dev; 878 if (!larbdev) 879 return ERR_PTR(-EINVAL); 880 881 link = device_link_add(dev, larbdev, 882 DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS); 883 if (!link) 884 dev_err(dev, "Unable to link %s\n", dev_name(larbdev)); 885 return &data->iommu; 886 } 887 888 static void mtk_iommu_release_device(struct device *dev) 889 { 890 struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); 891 struct mtk_iommu_data *data; 892 struct device *larbdev; 893 unsigned int larbid; 894 895 data = dev_iommu_priv_get(dev); 896 if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) { 897 larbid = MTK_M4U_TO_LARB(fwspec->ids[0]); 898 larbdev = data->larb_imu[larbid].dev; 899 device_link_remove(dev, larbdev); 900 } 901 } 902 903 static int mtk_iommu_get_group_id(struct device *dev, const struct mtk_iommu_plat_data *plat_data) 904 { 905 unsigned int bankid; 906 907 /* 908 * If the bank function is enabled, each bank is a iommu group/domain. 909 * Otherwise, each iova region is a iommu group/domain. 910 */ 911 bankid = mtk_iommu_get_bank_id(dev, plat_data); 912 if (bankid) 913 return bankid; 914 915 return mtk_iommu_get_iova_region_id(dev, plat_data); 916 } 917 918 static struct iommu_group *mtk_iommu_device_group(struct device *dev) 919 { 920 struct mtk_iommu_data *c_data = dev_iommu_priv_get(dev), *data; 921 struct list_head *hw_list = c_data->hw_list; 922 struct iommu_group *group; 923 int groupid; 924 925 data = mtk_iommu_get_frst_data(hw_list); 926 if (!data) 927 return ERR_PTR(-ENODEV); 928 929 groupid = mtk_iommu_get_group_id(dev, data->plat_data); 930 if (groupid < 0) 931 return ERR_PTR(groupid); 932 933 mutex_lock(&data->mutex); 934 group = data->m4u_group[groupid]; 935 if (!group) { 936 group = iommu_group_alloc(); 937 if (!IS_ERR(group)) 938 data->m4u_group[groupid] = group; 939 } else { 940 iommu_group_ref_get(group); 941 } 942 mutex_unlock(&data->mutex); 943 return group; 944 } 945 946 static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args) 947 { 948 struct platform_device *m4updev; 949 950 if (args->args_count != 1) { 951 dev_err(dev, "invalid #iommu-cells(%d) property for IOMMU\n", 952 args->args_count); 953 return -EINVAL; 954 } 955 956 if (!dev_iommu_priv_get(dev)) { 957 /* Get the m4u device */ 958 m4updev = of_find_device_by_node(args->np); 959 if (WARN_ON(!m4updev)) 960 return -EINVAL; 961 962 dev_iommu_priv_set(dev, platform_get_drvdata(m4updev)); 963 } 964 965 return iommu_fwspec_add_ids(dev, args->args, 1); 966 } 967 968 static void mtk_iommu_get_resv_regions(struct device *dev, 969 struct list_head *head) 970 { 971 struct mtk_iommu_data *data = dev_iommu_priv_get(dev); 972 unsigned int regionid = mtk_iommu_get_iova_region_id(dev, data->plat_data), i; 973 const struct mtk_iommu_iova_region *resv, *curdom; 974 struct iommu_resv_region *region; 975 int prot = IOMMU_WRITE | IOMMU_READ; 976 977 if ((int)regionid < 0) 978 return; 979 curdom = data->plat_data->iova_region + regionid; 980 for (i = 0; i < data->plat_data->iova_region_nr; i++) { 981 resv = data->plat_data->iova_region + i; 982 983 /* Only reserve when the region is inside the current domain */ 984 if (resv->iova_base <= curdom->iova_base || 985 resv->iova_base + resv->size >= curdom->iova_base + curdom->size) 986 continue; 987 988 region = iommu_alloc_resv_region(resv->iova_base, resv->size, 989 prot, IOMMU_RESV_RESERVED, 990 GFP_KERNEL); 991 if (!region) 992 return; 993 994 list_add_tail(®ion->list, head); 995 } 996 } 997 998 static const struct iommu_ops mtk_iommu_ops = { 999 .domain_alloc = mtk_iommu_domain_alloc, 1000 .probe_device = mtk_iommu_probe_device, 1001 .release_device = mtk_iommu_release_device, 1002 .device_group = mtk_iommu_device_group, 1003 .of_xlate = mtk_iommu_of_xlate, 1004 .get_resv_regions = mtk_iommu_get_resv_regions, 1005 .pgsize_bitmap = SZ_4K | SZ_64K | SZ_1M | SZ_16M, 1006 .owner = THIS_MODULE, 1007 .default_domain_ops = &(const struct iommu_domain_ops) { 1008 .attach_dev = mtk_iommu_attach_device, 1009 .map_pages = mtk_iommu_map, 1010 .unmap_pages = mtk_iommu_unmap, 1011 .flush_iotlb_all = mtk_iommu_flush_iotlb_all, 1012 .iotlb_sync = mtk_iommu_iotlb_sync, 1013 .iotlb_sync_map = mtk_iommu_sync_map, 1014 .iova_to_phys = mtk_iommu_iova_to_phys, 1015 .free = mtk_iommu_domain_free, 1016 } 1017 }; 1018 1019 static int mtk_iommu_hw_init(const struct mtk_iommu_data *data, unsigned int bankid) 1020 { 1021 const struct mtk_iommu_bank_data *bankx = &data->bank[bankid]; 1022 const struct mtk_iommu_bank_data *bank0 = &data->bank[0]; 1023 u32 regval; 1024 1025 /* 1026 * Global control settings are in bank0. May re-init these global registers 1027 * since no sure if there is bank0 consumers. 1028 */ 1029 if (MTK_IOMMU_HAS_FLAG(data->plat_data, TF_PORT_TO_ADDR_MT8173)) { 1030 regval = F_MMU_PREFETCH_RT_REPLACE_MOD | 1031 F_MMU_TF_PROT_TO_PROGRAM_ADDR_MT8173; 1032 } else { 1033 regval = readl_relaxed(bank0->base + REG_MMU_CTRL_REG); 1034 regval |= F_MMU_TF_PROT_TO_PROGRAM_ADDR; 1035 } 1036 writel_relaxed(regval, bank0->base + REG_MMU_CTRL_REG); 1037 1038 if (data->enable_4GB && 1039 MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_VLD_PA_RNG)) { 1040 /* 1041 * If 4GB mode is enabled, the validate PA range is from 1042 * 0x1_0000_0000 to 0x1_ffff_ffff. here record bit[32:30]. 1043 */ 1044 regval = F_MMU_VLD_PA_RNG(7, 4); 1045 writel_relaxed(regval, bank0->base + REG_MMU_VLD_PA_RNG); 1046 } 1047 if (MTK_IOMMU_HAS_FLAG(data->plat_data, DCM_DISABLE)) 1048 writel_relaxed(F_MMU_DCM, bank0->base + REG_MMU_DCM_DIS); 1049 else 1050 writel_relaxed(0, bank0->base + REG_MMU_DCM_DIS); 1051 1052 if (MTK_IOMMU_HAS_FLAG(data->plat_data, WR_THROT_EN)) { 1053 /* write command throttling mode */ 1054 regval = readl_relaxed(bank0->base + REG_MMU_WR_LEN_CTRL); 1055 regval &= ~F_MMU_WR_THROT_DIS_MASK; 1056 writel_relaxed(regval, bank0->base + REG_MMU_WR_LEN_CTRL); 1057 } 1058 1059 if (MTK_IOMMU_HAS_FLAG(data->plat_data, RESET_AXI)) { 1060 /* The register is called STANDARD_AXI_MODE in this case */ 1061 regval = 0; 1062 } else { 1063 regval = readl_relaxed(bank0->base + REG_MMU_MISC_CTRL); 1064 if (!MTK_IOMMU_HAS_FLAG(data->plat_data, STD_AXI_MODE)) 1065 regval &= ~F_MMU_STANDARD_AXI_MODE_MASK; 1066 if (MTK_IOMMU_HAS_FLAG(data->plat_data, OUT_ORDER_WR_EN)) 1067 regval &= ~F_MMU_IN_ORDER_WR_EN_MASK; 1068 } 1069 writel_relaxed(regval, bank0->base + REG_MMU_MISC_CTRL); 1070 1071 /* Independent settings for each bank */ 1072 regval = F_L2_MULIT_HIT_EN | 1073 F_TABLE_WALK_FAULT_INT_EN | 1074 F_PREETCH_FIFO_OVERFLOW_INT_EN | 1075 F_MISS_FIFO_OVERFLOW_INT_EN | 1076 F_PREFETCH_FIFO_ERR_INT_EN | 1077 F_MISS_FIFO_ERR_INT_EN; 1078 writel_relaxed(regval, bankx->base + REG_MMU_INT_CONTROL0); 1079 1080 regval = F_INT_TRANSLATION_FAULT | 1081 F_INT_MAIN_MULTI_HIT_FAULT | 1082 F_INT_INVALID_PA_FAULT | 1083 F_INT_ENTRY_REPLACEMENT_FAULT | 1084 F_INT_TLB_MISS_FAULT | 1085 F_INT_MISS_TRANSACTION_FIFO_FAULT | 1086 F_INT_PRETETCH_TRANSATION_FIFO_FAULT; 1087 writel_relaxed(regval, bankx->base + REG_MMU_INT_MAIN_CONTROL); 1088 1089 if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_LEGACY_IVRP_PADDR)) 1090 regval = (data->protect_base >> 1) | (data->enable_4GB << 31); 1091 else 1092 regval = lower_32_bits(data->protect_base) | 1093 upper_32_bits(data->protect_base); 1094 writel_relaxed(regval, bankx->base + REG_MMU_IVRP_PADDR); 1095 1096 if (devm_request_irq(bankx->parent_dev, bankx->irq, mtk_iommu_isr, 0, 1097 dev_name(bankx->parent_dev), (void *)bankx)) { 1098 writel_relaxed(0, bankx->base + REG_MMU_PT_BASE_ADDR); 1099 dev_err(bankx->parent_dev, "Failed @ IRQ-%d Request\n", bankx->irq); 1100 return -ENODEV; 1101 } 1102 1103 return 0; 1104 } 1105 1106 static const struct component_master_ops mtk_iommu_com_ops = { 1107 .bind = mtk_iommu_bind, 1108 .unbind = mtk_iommu_unbind, 1109 }; 1110 1111 static int mtk_iommu_mm_dts_parse(struct device *dev, struct component_match **match, 1112 struct mtk_iommu_data *data) 1113 { 1114 struct device_node *larbnode, *frst_avail_smicomm_node = NULL; 1115 struct platform_device *plarbdev, *pcommdev; 1116 struct device_link *link; 1117 int i, larb_nr, ret; 1118 1119 larb_nr = of_count_phandle_with_args(dev->of_node, "mediatek,larbs", NULL); 1120 if (larb_nr < 0) 1121 return larb_nr; 1122 if (larb_nr == 0 || larb_nr > MTK_LARB_NR_MAX) 1123 return -EINVAL; 1124 1125 for (i = 0; i < larb_nr; i++) { 1126 struct device_node *smicomm_node, *smi_subcomm_node; 1127 u32 id; 1128 1129 larbnode = of_parse_phandle(dev->of_node, "mediatek,larbs", i); 1130 if (!larbnode) { 1131 ret = -EINVAL; 1132 goto err_larbdev_put; 1133 } 1134 1135 if (!of_device_is_available(larbnode)) { 1136 of_node_put(larbnode); 1137 continue; 1138 } 1139 1140 ret = of_property_read_u32(larbnode, "mediatek,larb-id", &id); 1141 if (ret)/* The id is consecutive if there is no this property */ 1142 id = i; 1143 if (id >= MTK_LARB_NR_MAX) { 1144 of_node_put(larbnode); 1145 ret = -EINVAL; 1146 goto err_larbdev_put; 1147 } 1148 1149 plarbdev = of_find_device_by_node(larbnode); 1150 of_node_put(larbnode); 1151 if (!plarbdev) { 1152 ret = -ENODEV; 1153 goto err_larbdev_put; 1154 } 1155 if (data->larb_imu[id].dev) { 1156 platform_device_put(plarbdev); 1157 ret = -EEXIST; 1158 goto err_larbdev_put; 1159 } 1160 data->larb_imu[id].dev = &plarbdev->dev; 1161 1162 if (!plarbdev->dev.driver) { 1163 ret = -EPROBE_DEFER; 1164 goto err_larbdev_put; 1165 } 1166 1167 /* Get smi-(sub)-common dev from the last larb. */ 1168 smi_subcomm_node = of_parse_phandle(larbnode, "mediatek,smi", 0); 1169 if (!smi_subcomm_node) { 1170 ret = -EINVAL; 1171 goto err_larbdev_put; 1172 } 1173 1174 /* 1175 * It may have two level smi-common. the node is smi-sub-common if it 1176 * has a new mediatek,smi property. otherwise it is smi-commmon. 1177 */ 1178 smicomm_node = of_parse_phandle(smi_subcomm_node, "mediatek,smi", 0); 1179 if (smicomm_node) 1180 of_node_put(smi_subcomm_node); 1181 else 1182 smicomm_node = smi_subcomm_node; 1183 1184 /* 1185 * All the larbs that connect to one IOMMU must connect with the same 1186 * smi-common. 1187 */ 1188 if (!frst_avail_smicomm_node) { 1189 frst_avail_smicomm_node = smicomm_node; 1190 } else if (frst_avail_smicomm_node != smicomm_node) { 1191 dev_err(dev, "mediatek,smi property is not right @larb%d.", id); 1192 of_node_put(smicomm_node); 1193 ret = -EINVAL; 1194 goto err_larbdev_put; 1195 } else { 1196 of_node_put(smicomm_node); 1197 } 1198 1199 component_match_add(dev, match, component_compare_dev, &plarbdev->dev); 1200 platform_device_put(plarbdev); 1201 } 1202 1203 if (!frst_avail_smicomm_node) 1204 return -EINVAL; 1205 1206 pcommdev = of_find_device_by_node(frst_avail_smicomm_node); 1207 of_node_put(frst_avail_smicomm_node); 1208 if (!pcommdev) 1209 return -ENODEV; 1210 data->smicomm_dev = &pcommdev->dev; 1211 1212 link = device_link_add(data->smicomm_dev, dev, 1213 DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME); 1214 platform_device_put(pcommdev); 1215 if (!link) { 1216 dev_err(dev, "Unable to link %s.\n", dev_name(data->smicomm_dev)); 1217 return -EINVAL; 1218 } 1219 return 0; 1220 1221 err_larbdev_put: 1222 for (i = MTK_LARB_NR_MAX - 1; i >= 0; i--) { 1223 if (!data->larb_imu[i].dev) 1224 continue; 1225 put_device(data->larb_imu[i].dev); 1226 } 1227 return ret; 1228 } 1229 1230 static int mtk_iommu_probe(struct platform_device *pdev) 1231 { 1232 struct mtk_iommu_data *data; 1233 struct device *dev = &pdev->dev; 1234 struct resource *res; 1235 resource_size_t ioaddr; 1236 struct component_match *match = NULL; 1237 struct regmap *infracfg; 1238 void *protect; 1239 int ret, banks_num, i = 0; 1240 u32 val; 1241 char *p; 1242 struct mtk_iommu_bank_data *bank; 1243 void __iomem *base; 1244 1245 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); 1246 if (!data) 1247 return -ENOMEM; 1248 data->dev = dev; 1249 data->plat_data = of_device_get_match_data(dev); 1250 1251 /* Protect memory. HW will access here while translation fault.*/ 1252 protect = devm_kzalloc(dev, MTK_PROTECT_PA_ALIGN * 2, GFP_KERNEL); 1253 if (!protect) 1254 return -ENOMEM; 1255 data->protect_base = ALIGN(virt_to_phys(protect), MTK_PROTECT_PA_ALIGN); 1256 1257 if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_4GB_MODE)) { 1258 infracfg = syscon_regmap_lookup_by_phandle(dev->of_node, "mediatek,infracfg"); 1259 if (IS_ERR(infracfg)) { 1260 /* 1261 * Legacy devicetrees will not specify a phandle to 1262 * mediatek,infracfg: in that case, we use the older 1263 * way to retrieve a syscon to infra. 1264 * 1265 * This is for retrocompatibility purposes only, hence 1266 * no more compatibles shall be added to this. 1267 */ 1268 switch (data->plat_data->m4u_plat) { 1269 case M4U_MT2712: 1270 p = "mediatek,mt2712-infracfg"; 1271 break; 1272 case M4U_MT8173: 1273 p = "mediatek,mt8173-infracfg"; 1274 break; 1275 default: 1276 p = NULL; 1277 } 1278 1279 infracfg = syscon_regmap_lookup_by_compatible(p); 1280 if (IS_ERR(infracfg)) 1281 return PTR_ERR(infracfg); 1282 } 1283 1284 ret = regmap_read(infracfg, REG_INFRA_MISC, &val); 1285 if (ret) 1286 return ret; 1287 data->enable_4GB = !!(val & F_DDR_4GB_SUPPORT_EN); 1288 } 1289 1290 banks_num = data->plat_data->banks_num; 1291 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1292 if (!res) 1293 return -EINVAL; 1294 if (resource_size(res) < banks_num * MTK_IOMMU_BANK_SZ) { 1295 dev_err(dev, "banknr %d. res %pR is not enough.\n", banks_num, res); 1296 return -EINVAL; 1297 } 1298 base = devm_ioremap_resource(dev, res); 1299 if (IS_ERR(base)) 1300 return PTR_ERR(base); 1301 ioaddr = res->start; 1302 1303 data->bank = devm_kmalloc(dev, banks_num * sizeof(*data->bank), GFP_KERNEL); 1304 if (!data->bank) 1305 return -ENOMEM; 1306 1307 do { 1308 if (!data->plat_data->banks_enable[i]) 1309 continue; 1310 bank = &data->bank[i]; 1311 bank->id = i; 1312 bank->base = base + i * MTK_IOMMU_BANK_SZ; 1313 bank->m4u_dom = NULL; 1314 1315 bank->irq = platform_get_irq(pdev, i); 1316 if (bank->irq < 0) 1317 return bank->irq; 1318 bank->parent_dev = dev; 1319 bank->parent_data = data; 1320 spin_lock_init(&bank->tlb_lock); 1321 } while (++i < banks_num); 1322 1323 if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_BCLK)) { 1324 data->bclk = devm_clk_get(dev, "bclk"); 1325 if (IS_ERR(data->bclk)) 1326 return PTR_ERR(data->bclk); 1327 } 1328 1329 if (MTK_IOMMU_HAS_FLAG(data->plat_data, PGTABLE_PA_35_EN)) { 1330 ret = dma_set_mask(dev, DMA_BIT_MASK(35)); 1331 if (ret) { 1332 dev_err(dev, "Failed to set dma_mask 35.\n"); 1333 return ret; 1334 } 1335 } 1336 1337 pm_runtime_enable(dev); 1338 1339 if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) { 1340 ret = mtk_iommu_mm_dts_parse(dev, &match, data); 1341 if (ret) { 1342 dev_err_probe(dev, ret, "mm dts parse fail\n"); 1343 goto out_runtime_disable; 1344 } 1345 } else if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_INFRA) && 1346 !MTK_IOMMU_HAS_FLAG(data->plat_data, CFG_IFA_MASTER_IN_ATF)) { 1347 p = data->plat_data->pericfg_comp_str; 1348 data->pericfg = syscon_regmap_lookup_by_compatible(p); 1349 if (IS_ERR(data->pericfg)) { 1350 ret = PTR_ERR(data->pericfg); 1351 goto out_runtime_disable; 1352 } 1353 } 1354 1355 platform_set_drvdata(pdev, data); 1356 mutex_init(&data->mutex); 1357 1358 ret = iommu_device_sysfs_add(&data->iommu, dev, NULL, 1359 "mtk-iommu.%pa", &ioaddr); 1360 if (ret) 1361 goto out_link_remove; 1362 1363 ret = iommu_device_register(&data->iommu, &mtk_iommu_ops, dev); 1364 if (ret) 1365 goto out_sysfs_remove; 1366 1367 if (MTK_IOMMU_HAS_FLAG(data->plat_data, SHARE_PGTABLE)) { 1368 list_add_tail(&data->list, data->plat_data->hw_list); 1369 data->hw_list = data->plat_data->hw_list; 1370 } else { 1371 INIT_LIST_HEAD(&data->hw_list_head); 1372 list_add_tail(&data->list, &data->hw_list_head); 1373 data->hw_list = &data->hw_list_head; 1374 } 1375 1376 if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) { 1377 ret = component_master_add_with_match(dev, &mtk_iommu_com_ops, match); 1378 if (ret) 1379 goto out_list_del; 1380 } 1381 return ret; 1382 1383 out_list_del: 1384 list_del(&data->list); 1385 iommu_device_unregister(&data->iommu); 1386 out_sysfs_remove: 1387 iommu_device_sysfs_remove(&data->iommu); 1388 out_link_remove: 1389 if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) 1390 device_link_remove(data->smicomm_dev, dev); 1391 out_runtime_disable: 1392 pm_runtime_disable(dev); 1393 return ret; 1394 } 1395 1396 static void mtk_iommu_remove(struct platform_device *pdev) 1397 { 1398 struct mtk_iommu_data *data = platform_get_drvdata(pdev); 1399 struct mtk_iommu_bank_data *bank; 1400 int i; 1401 1402 iommu_device_sysfs_remove(&data->iommu); 1403 iommu_device_unregister(&data->iommu); 1404 1405 list_del(&data->list); 1406 1407 if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) { 1408 device_link_remove(data->smicomm_dev, &pdev->dev); 1409 component_master_del(&pdev->dev, &mtk_iommu_com_ops); 1410 } 1411 pm_runtime_disable(&pdev->dev); 1412 for (i = 0; i < data->plat_data->banks_num; i++) { 1413 bank = &data->bank[i]; 1414 if (!bank->m4u_dom) 1415 continue; 1416 devm_free_irq(&pdev->dev, bank->irq, bank); 1417 } 1418 } 1419 1420 static int __maybe_unused mtk_iommu_runtime_suspend(struct device *dev) 1421 { 1422 struct mtk_iommu_data *data = dev_get_drvdata(dev); 1423 struct mtk_iommu_suspend_reg *reg = &data->reg; 1424 void __iomem *base; 1425 int i = 0; 1426 1427 base = data->bank[i].base; 1428 reg->wr_len_ctrl = readl_relaxed(base + REG_MMU_WR_LEN_CTRL); 1429 reg->misc_ctrl = readl_relaxed(base + REG_MMU_MISC_CTRL); 1430 reg->dcm_dis = readl_relaxed(base + REG_MMU_DCM_DIS); 1431 reg->ctrl_reg = readl_relaxed(base + REG_MMU_CTRL_REG); 1432 reg->vld_pa_rng = readl_relaxed(base + REG_MMU_VLD_PA_RNG); 1433 do { 1434 if (!data->plat_data->banks_enable[i]) 1435 continue; 1436 base = data->bank[i].base; 1437 reg->int_control[i] = readl_relaxed(base + REG_MMU_INT_CONTROL0); 1438 reg->int_main_control[i] = readl_relaxed(base + REG_MMU_INT_MAIN_CONTROL); 1439 reg->ivrp_paddr[i] = readl_relaxed(base + REG_MMU_IVRP_PADDR); 1440 } while (++i < data->plat_data->banks_num); 1441 clk_disable_unprepare(data->bclk); 1442 return 0; 1443 } 1444 1445 static int __maybe_unused mtk_iommu_runtime_resume(struct device *dev) 1446 { 1447 struct mtk_iommu_data *data = dev_get_drvdata(dev); 1448 struct mtk_iommu_suspend_reg *reg = &data->reg; 1449 struct mtk_iommu_domain *m4u_dom; 1450 void __iomem *base; 1451 int ret, i = 0; 1452 1453 ret = clk_prepare_enable(data->bclk); 1454 if (ret) { 1455 dev_err(data->dev, "Failed to enable clk(%d) in resume\n", ret); 1456 return ret; 1457 } 1458 1459 /* 1460 * Uppon first resume, only enable the clk and return, since the values of the 1461 * registers are not yet set. 1462 */ 1463 if (!reg->wr_len_ctrl) 1464 return 0; 1465 1466 base = data->bank[i].base; 1467 writel_relaxed(reg->wr_len_ctrl, base + REG_MMU_WR_LEN_CTRL); 1468 writel_relaxed(reg->misc_ctrl, base + REG_MMU_MISC_CTRL); 1469 writel_relaxed(reg->dcm_dis, base + REG_MMU_DCM_DIS); 1470 writel_relaxed(reg->ctrl_reg, base + REG_MMU_CTRL_REG); 1471 writel_relaxed(reg->vld_pa_rng, base + REG_MMU_VLD_PA_RNG); 1472 do { 1473 m4u_dom = data->bank[i].m4u_dom; 1474 if (!data->plat_data->banks_enable[i] || !m4u_dom) 1475 continue; 1476 base = data->bank[i].base; 1477 writel_relaxed(reg->int_control[i], base + REG_MMU_INT_CONTROL0); 1478 writel_relaxed(reg->int_main_control[i], base + REG_MMU_INT_MAIN_CONTROL); 1479 writel_relaxed(reg->ivrp_paddr[i], base + REG_MMU_IVRP_PADDR); 1480 writel(m4u_dom->cfg.arm_v7s_cfg.ttbr, base + REG_MMU_PT_BASE_ADDR); 1481 } while (++i < data->plat_data->banks_num); 1482 1483 /* 1484 * Users may allocate dma buffer before they call pm_runtime_get, 1485 * in which case it will lack the necessary tlb flush. 1486 * Thus, make sure to update the tlb after each PM resume. 1487 */ 1488 mtk_iommu_tlb_flush_all(data); 1489 return 0; 1490 } 1491 1492 static const struct dev_pm_ops mtk_iommu_pm_ops = { 1493 SET_RUNTIME_PM_OPS(mtk_iommu_runtime_suspend, mtk_iommu_runtime_resume, NULL) 1494 SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 1495 pm_runtime_force_resume) 1496 }; 1497 1498 static const struct mtk_iommu_plat_data mt2712_data = { 1499 .m4u_plat = M4U_MT2712, 1500 .flags = HAS_4GB_MODE | HAS_BCLK | HAS_VLD_PA_RNG | SHARE_PGTABLE | 1501 MTK_IOMMU_TYPE_MM, 1502 .hw_list = &m4ulist, 1503 .inv_sel_reg = REG_MMU_INV_SEL_GEN1, 1504 .iova_region = single_domain, 1505 .banks_num = 1, 1506 .banks_enable = {true}, 1507 .iova_region_nr = ARRAY_SIZE(single_domain), 1508 .larbid_remap = {{0}, {1}, {2}, {3}, {4}, {5}, {6}, {7}}, 1509 }; 1510 1511 static const struct mtk_iommu_plat_data mt6779_data = { 1512 .m4u_plat = M4U_MT6779, 1513 .flags = HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN | WR_THROT_EN | 1514 MTK_IOMMU_TYPE_MM | PGTABLE_PA_35_EN, 1515 .inv_sel_reg = REG_MMU_INV_SEL_GEN2, 1516 .banks_num = 1, 1517 .banks_enable = {true}, 1518 .iova_region = single_domain, 1519 .iova_region_nr = ARRAY_SIZE(single_domain), 1520 .larbid_remap = {{0}, {1}, {2}, {3}, {5}, {7, 8}, {10}, {9}}, 1521 }; 1522 1523 static const struct mtk_iommu_plat_data mt6795_data = { 1524 .m4u_plat = M4U_MT6795, 1525 .flags = HAS_4GB_MODE | HAS_BCLK | RESET_AXI | 1526 HAS_LEGACY_IVRP_PADDR | MTK_IOMMU_TYPE_MM | 1527 TF_PORT_TO_ADDR_MT8173, 1528 .inv_sel_reg = REG_MMU_INV_SEL_GEN1, 1529 .banks_num = 1, 1530 .banks_enable = {true}, 1531 .iova_region = single_domain, 1532 .iova_region_nr = ARRAY_SIZE(single_domain), 1533 .larbid_remap = {{0}, {1}, {2}, {3}, {4}}, /* Linear mapping. */ 1534 }; 1535 1536 static const struct mtk_iommu_plat_data mt8167_data = { 1537 .m4u_plat = M4U_MT8167, 1538 .flags = RESET_AXI | HAS_LEGACY_IVRP_PADDR | MTK_IOMMU_TYPE_MM, 1539 .inv_sel_reg = REG_MMU_INV_SEL_GEN1, 1540 .banks_num = 1, 1541 .banks_enable = {true}, 1542 .iova_region = single_domain, 1543 .iova_region_nr = ARRAY_SIZE(single_domain), 1544 .larbid_remap = {{0}, {1}, {2}}, /* Linear mapping. */ 1545 }; 1546 1547 static const struct mtk_iommu_plat_data mt8173_data = { 1548 .m4u_plat = M4U_MT8173, 1549 .flags = HAS_4GB_MODE | HAS_BCLK | RESET_AXI | 1550 HAS_LEGACY_IVRP_PADDR | MTK_IOMMU_TYPE_MM | 1551 TF_PORT_TO_ADDR_MT8173, 1552 .inv_sel_reg = REG_MMU_INV_SEL_GEN1, 1553 .banks_num = 1, 1554 .banks_enable = {true}, 1555 .iova_region = single_domain, 1556 .iova_region_nr = ARRAY_SIZE(single_domain), 1557 .larbid_remap = {{0}, {1}, {2}, {3}, {4}, {5}}, /* Linear mapping. */ 1558 }; 1559 1560 static const struct mtk_iommu_plat_data mt8183_data = { 1561 .m4u_plat = M4U_MT8183, 1562 .flags = RESET_AXI | MTK_IOMMU_TYPE_MM, 1563 .inv_sel_reg = REG_MMU_INV_SEL_GEN1, 1564 .banks_num = 1, 1565 .banks_enable = {true}, 1566 .iova_region = single_domain, 1567 .iova_region_nr = ARRAY_SIZE(single_domain), 1568 .larbid_remap = {{0}, {4}, {5}, {6}, {7}, {2}, {3}, {1}}, 1569 }; 1570 1571 static const unsigned int mt8186_larb_region_msk[MT8192_MULTI_REGION_NR_MAX][MTK_LARB_NR_MAX] = { 1572 [0] = {~0, ~0, ~0}, /* Region0: all ports for larb0/1/2 */ 1573 [1] = {0, 0, 0, 0, ~0, 0, 0, ~0}, /* Region1: larb4/7 */ 1574 [2] = {0, 0, 0, 0, 0, 0, 0, 0, /* Region2: larb8/9/11/13/16/17/19/20 */ 1575 ~0, ~0, 0, ~0, 0, ~(u32)(BIT(9) | BIT(10)), 0, 0, 1576 /* larb13: the other ports except port9/10 */ 1577 ~0, ~0, 0, ~0, ~0}, 1578 [3] = {0}, 1579 [4] = {[13] = BIT(9) | BIT(10)}, /* larb13 port9/10 */ 1580 [5] = {[14] = ~0}, /* larb14 */ 1581 }; 1582 1583 static const struct mtk_iommu_plat_data mt8186_data_mm = { 1584 .m4u_plat = M4U_MT8186, 1585 .flags = HAS_BCLK | HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN | 1586 WR_THROT_EN | IOVA_34_EN | MTK_IOMMU_TYPE_MM, 1587 .larbid_remap = {{0}, {1, MTK_INVALID_LARBID, 8}, {4}, {7}, {2}, {9, 11, 19, 20}, 1588 {MTK_INVALID_LARBID, 14, 16}, 1589 {MTK_INVALID_LARBID, 13, MTK_INVALID_LARBID, 17}}, 1590 .inv_sel_reg = REG_MMU_INV_SEL_GEN2, 1591 .banks_num = 1, 1592 .banks_enable = {true}, 1593 .iova_region = mt8192_multi_dom, 1594 .iova_region_nr = ARRAY_SIZE(mt8192_multi_dom), 1595 .iova_region_larb_msk = mt8186_larb_region_msk, 1596 }; 1597 1598 static const struct mtk_iommu_plat_data mt8188_data_infra = { 1599 .m4u_plat = M4U_MT8188, 1600 .flags = WR_THROT_EN | DCM_DISABLE | STD_AXI_MODE | PM_CLK_AO | 1601 MTK_IOMMU_TYPE_INFRA | IFA_IOMMU_PCIE_SUPPORT | 1602 PGTABLE_PA_35_EN | CFG_IFA_MASTER_IN_ATF, 1603 .inv_sel_reg = REG_MMU_INV_SEL_GEN2, 1604 .banks_num = 1, 1605 .banks_enable = {true}, 1606 .iova_region = single_domain, 1607 .iova_region_nr = ARRAY_SIZE(single_domain), 1608 }; 1609 1610 static const u32 mt8188_larb_region_msk[MT8192_MULTI_REGION_NR_MAX][MTK_LARB_NR_MAX] = { 1611 [0] = {~0, ~0, ~0, ~0}, /* Region0: all ports for larb0/1/2/3 */ 1612 [1] = {0, 0, 0, 0, 0, 0, 0, 0, 1613 0, 0, 0, 0, 0, 0, 0, 0, 1614 0, 0, 0, 0, 0, ~0, ~0, ~0}, /* Region1: larb19(21)/21(22)/23 */ 1615 [2] = {0, 0, 0, 0, ~0, ~0, ~0, ~0, /* Region2: the other larbs. */ 1616 ~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 1617 ~0, ~0, ~0, ~0, ~0, 0, 0, 0, 1618 0, ~0}, 1619 [3] = {0}, 1620 [4] = {[24] = BIT(0) | BIT(1)}, /* Only larb27(24) port0/1 */ 1621 [5] = {[24] = BIT(2) | BIT(3)}, /* Only larb27(24) port2/3 */ 1622 }; 1623 1624 static const struct mtk_iommu_plat_data mt8188_data_vdo = { 1625 .m4u_plat = M4U_MT8188, 1626 .flags = HAS_BCLK | HAS_SUB_COMM_3BITS | OUT_ORDER_WR_EN | 1627 WR_THROT_EN | IOVA_34_EN | SHARE_PGTABLE | 1628 PGTABLE_PA_35_EN | MTK_IOMMU_TYPE_MM, 1629 .hw_list = &m4ulist, 1630 .inv_sel_reg = REG_MMU_INV_SEL_GEN2, 1631 .banks_num = 1, 1632 .banks_enable = {true}, 1633 .iova_region = mt8192_multi_dom, 1634 .iova_region_nr = ARRAY_SIZE(mt8192_multi_dom), 1635 .iova_region_larb_msk = mt8188_larb_region_msk, 1636 .larbid_remap = {{2}, {0}, {21}, {0}, {19}, {9, 10, 1637 11 /* 11a */, 25 /* 11c */}, 1638 {13, 0, 29 /* 16b */, 30 /* 17b */, 0}, {5}}, 1639 }; 1640 1641 static const struct mtk_iommu_plat_data mt8188_data_vpp = { 1642 .m4u_plat = M4U_MT8188, 1643 .flags = HAS_BCLK | HAS_SUB_COMM_3BITS | OUT_ORDER_WR_EN | 1644 WR_THROT_EN | IOVA_34_EN | SHARE_PGTABLE | 1645 PGTABLE_PA_35_EN | MTK_IOMMU_TYPE_MM, 1646 .hw_list = &m4ulist, 1647 .inv_sel_reg = REG_MMU_INV_SEL_GEN2, 1648 .banks_num = 1, 1649 .banks_enable = {true}, 1650 .iova_region = mt8192_multi_dom, 1651 .iova_region_nr = ARRAY_SIZE(mt8192_multi_dom), 1652 .iova_region_larb_msk = mt8188_larb_region_msk, 1653 .larbid_remap = {{1}, {3}, {23}, {7}, {MTK_INVALID_LARBID}, 1654 {12, 15, 24 /* 11b */}, {14, MTK_INVALID_LARBID, 1655 16 /* 16a */, 17 /* 17a */, MTK_INVALID_LARBID, 1656 27, 28 /* ccu0 */, MTK_INVALID_LARBID}, {4, 6}}, 1657 }; 1658 1659 static const unsigned int mt8192_larb_region_msk[MT8192_MULTI_REGION_NR_MAX][MTK_LARB_NR_MAX] = { 1660 [0] = {~0, ~0}, /* Region0: larb0/1 */ 1661 [1] = {0, 0, 0, 0, ~0, ~0, 0, ~0}, /* Region1: larb4/5/7 */ 1662 [2] = {0, 0, ~0, 0, 0, 0, 0, 0, /* Region2: larb2/9/11/13/14/16/17/18/19/20 */ 1663 0, ~0, 0, ~0, 0, ~(u32)(BIT(9) | BIT(10)), ~(u32)(BIT(4) | BIT(5)), 0, 1664 ~0, ~0, ~0, ~0, ~0}, 1665 [3] = {0}, 1666 [4] = {[13] = BIT(9) | BIT(10)}, /* larb13 port9/10 */ 1667 [5] = {[14] = BIT(4) | BIT(5)}, /* larb14 port4/5 */ 1668 }; 1669 1670 static const struct mtk_iommu_plat_data mt8192_data = { 1671 .m4u_plat = M4U_MT8192, 1672 .flags = HAS_BCLK | HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN | 1673 WR_THROT_EN | IOVA_34_EN | MTK_IOMMU_TYPE_MM, 1674 .inv_sel_reg = REG_MMU_INV_SEL_GEN2, 1675 .banks_num = 1, 1676 .banks_enable = {true}, 1677 .iova_region = mt8192_multi_dom, 1678 .iova_region_nr = ARRAY_SIZE(mt8192_multi_dom), 1679 .iova_region_larb_msk = mt8192_larb_region_msk, 1680 .larbid_remap = {{0}, {1}, {4, 5}, {7}, {2}, {9, 11, 19, 20}, 1681 {0, 14, 16}, {0, 13, 18, 17}}, 1682 }; 1683 1684 static const struct mtk_iommu_plat_data mt8195_data_infra = { 1685 .m4u_plat = M4U_MT8195, 1686 .flags = WR_THROT_EN | DCM_DISABLE | STD_AXI_MODE | PM_CLK_AO | 1687 MTK_IOMMU_TYPE_INFRA | IFA_IOMMU_PCIE_SUPPORT, 1688 .pericfg_comp_str = "mediatek,mt8195-pericfg_ao", 1689 .inv_sel_reg = REG_MMU_INV_SEL_GEN2, 1690 .banks_num = 5, 1691 .banks_enable = {true, false, false, false, true}, 1692 .banks_portmsk = {[0] = GENMASK(19, 16), /* PCIe */ 1693 [4] = GENMASK(31, 20), /* USB */ 1694 }, 1695 .iova_region = single_domain, 1696 .iova_region_nr = ARRAY_SIZE(single_domain), 1697 }; 1698 1699 static const unsigned int mt8195_larb_region_msk[MT8192_MULTI_REGION_NR_MAX][MTK_LARB_NR_MAX] = { 1700 [0] = {~0, ~0, ~0, ~0}, /* Region0: all ports for larb0/1/2/3 */ 1701 [1] = {0, 0, 0, 0, 0, 0, 0, 0, 1702 0, 0, 0, 0, 0, 0, 0, 0, 1703 0, 0, 0, ~0, ~0, ~0, ~0, ~0, /* Region1: larb19/20/21/22/23/24 */ 1704 ~0}, 1705 [2] = {0, 0, 0, 0, ~0, ~0, ~0, ~0, /* Region2: the other larbs. */ 1706 ~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 1707 ~0, ~0, 0, 0, 0, 0, 0, 0, 1708 0, ~0, ~0, ~0, ~0}, 1709 [3] = {0}, 1710 [4] = {[18] = BIT(0) | BIT(1)}, /* Only larb18 port0/1 */ 1711 [5] = {[18] = BIT(2) | BIT(3)}, /* Only larb18 port2/3 */ 1712 }; 1713 1714 static const struct mtk_iommu_plat_data mt8195_data_vdo = { 1715 .m4u_plat = M4U_MT8195, 1716 .flags = HAS_BCLK | HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN | 1717 WR_THROT_EN | IOVA_34_EN | SHARE_PGTABLE | MTK_IOMMU_TYPE_MM, 1718 .hw_list = &m4ulist, 1719 .inv_sel_reg = REG_MMU_INV_SEL_GEN2, 1720 .banks_num = 1, 1721 .banks_enable = {true}, 1722 .iova_region = mt8192_multi_dom, 1723 .iova_region_nr = ARRAY_SIZE(mt8192_multi_dom), 1724 .iova_region_larb_msk = mt8195_larb_region_msk, 1725 .larbid_remap = {{2, 0}, {21}, {24}, {7}, {19}, {9, 10, 11}, 1726 {13, 17, 15/* 17b */, 25}, {5}}, 1727 }; 1728 1729 static const struct mtk_iommu_plat_data mt8195_data_vpp = { 1730 .m4u_plat = M4U_MT8195, 1731 .flags = HAS_BCLK | HAS_SUB_COMM_3BITS | OUT_ORDER_WR_EN | 1732 WR_THROT_EN | IOVA_34_EN | SHARE_PGTABLE | MTK_IOMMU_TYPE_MM, 1733 .hw_list = &m4ulist, 1734 .inv_sel_reg = REG_MMU_INV_SEL_GEN2, 1735 .banks_num = 1, 1736 .banks_enable = {true}, 1737 .iova_region = mt8192_multi_dom, 1738 .iova_region_nr = ARRAY_SIZE(mt8192_multi_dom), 1739 .iova_region_larb_msk = mt8195_larb_region_msk, 1740 .larbid_remap = {{1}, {3}, 1741 {22, MTK_INVALID_LARBID, MTK_INVALID_LARBID, MTK_INVALID_LARBID, 23}, 1742 {8}, {20}, {12}, 1743 /* 16: 16a; 29: 16b; 30: CCUtop0; 31: CCUtop1 */ 1744 {14, 16, 29, 26, 30, 31, 18}, 1745 {4, MTK_INVALID_LARBID, MTK_INVALID_LARBID, MTK_INVALID_LARBID, 6}}, 1746 }; 1747 1748 static const struct mtk_iommu_plat_data mt8365_data = { 1749 .m4u_plat = M4U_MT8365, 1750 .flags = RESET_AXI | INT_ID_PORT_WIDTH_6, 1751 .inv_sel_reg = REG_MMU_INV_SEL_GEN1, 1752 .banks_num = 1, 1753 .banks_enable = {true}, 1754 .iova_region = single_domain, 1755 .iova_region_nr = ARRAY_SIZE(single_domain), 1756 .larbid_remap = {{0}, {1}, {2}, {3}, {4}, {5}}, /* Linear mapping. */ 1757 }; 1758 1759 static const struct of_device_id mtk_iommu_of_ids[] = { 1760 { .compatible = "mediatek,mt2712-m4u", .data = &mt2712_data}, 1761 { .compatible = "mediatek,mt6779-m4u", .data = &mt6779_data}, 1762 { .compatible = "mediatek,mt6795-m4u", .data = &mt6795_data}, 1763 { .compatible = "mediatek,mt8167-m4u", .data = &mt8167_data}, 1764 { .compatible = "mediatek,mt8173-m4u", .data = &mt8173_data}, 1765 { .compatible = "mediatek,mt8183-m4u", .data = &mt8183_data}, 1766 { .compatible = "mediatek,mt8186-iommu-mm", .data = &mt8186_data_mm}, /* mm: m4u */ 1767 { .compatible = "mediatek,mt8188-iommu-infra", .data = &mt8188_data_infra}, 1768 { .compatible = "mediatek,mt8188-iommu-vdo", .data = &mt8188_data_vdo}, 1769 { .compatible = "mediatek,mt8188-iommu-vpp", .data = &mt8188_data_vpp}, 1770 { .compatible = "mediatek,mt8192-m4u", .data = &mt8192_data}, 1771 { .compatible = "mediatek,mt8195-iommu-infra", .data = &mt8195_data_infra}, 1772 { .compatible = "mediatek,mt8195-iommu-vdo", .data = &mt8195_data_vdo}, 1773 { .compatible = "mediatek,mt8195-iommu-vpp", .data = &mt8195_data_vpp}, 1774 { .compatible = "mediatek,mt8365-m4u", .data = &mt8365_data}, 1775 {} 1776 }; 1777 1778 static struct platform_driver mtk_iommu_driver = { 1779 .probe = mtk_iommu_probe, 1780 .remove_new = mtk_iommu_remove, 1781 .driver = { 1782 .name = "mtk-iommu", 1783 .of_match_table = mtk_iommu_of_ids, 1784 .pm = &mtk_iommu_pm_ops, 1785 } 1786 }; 1787 module_platform_driver(mtk_iommu_driver); 1788 1789 MODULE_DESCRIPTION("IOMMU API for MediaTek M4U implementations"); 1790 MODULE_LICENSE("GPL v2"); 1791