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;
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
mtk_iommu_bind(struct device * dev)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
mtk_iommu_unbind(struct device * dev)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.*/
mtk_iommu_get_frst_data(struct list_head * hwlist)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
to_mtk_domain(struct iommu_domain * dom)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
mtk_iommu_tlb_flush_all(struct mtk_iommu_data * data)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
mtk_iommu_tlb_flush_range_sync(unsigned long iova,size_t size,struct mtk_iommu_bank_data * bank)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
mtk_iommu_isr(int irq,void * dev_id)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
mtk_iommu_get_bank_id(struct device * dev,const struct mtk_iommu_plat_data * plat_data)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
mtk_iommu_get_iova_region_id(struct device * dev,const struct mtk_iommu_plat_data * plat_data)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
mtk_iommu_config(struct mtk_iommu_data * data,struct device * dev,bool enable,unsigned int regionid)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
mtk_iommu_domain_finalise(struct mtk_iommu_domain * dom,struct mtk_iommu_data * data,unsigned int region_id)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 /* Share pgtable when 2 MM IOMMU share the pgtable or one IOMMU use multiple iova ranges */
647 if (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 data->share_dom = dom;
681
682 update_iova_region:
683 /* Update the iova region for this domain */
684 region = data->plat_data->iova_region + region_id;
685 dom->domain.geometry.aperture_start = region->iova_base;
686 dom->domain.geometry.aperture_end = region->iova_base + region->size - 1;
687 dom->domain.geometry.force_aperture = true;
688 return 0;
689 }
690
mtk_iommu_domain_alloc_paging(struct device * dev)691 static struct iommu_domain *mtk_iommu_domain_alloc_paging(struct device *dev)
692 {
693 struct mtk_iommu_domain *dom;
694
695 dom = kzalloc(sizeof(*dom), GFP_KERNEL);
696 if (!dom)
697 return NULL;
698 mutex_init(&dom->mutex);
699
700 return &dom->domain;
701 }
702
mtk_iommu_domain_free(struct iommu_domain * domain)703 static void mtk_iommu_domain_free(struct iommu_domain *domain)
704 {
705 kfree(to_mtk_domain(domain));
706 }
707
mtk_iommu_attach_device(struct iommu_domain * domain,struct device * dev)708 static int mtk_iommu_attach_device(struct iommu_domain *domain,
709 struct device *dev)
710 {
711 struct mtk_iommu_data *data = dev_iommu_priv_get(dev), *frstdata;
712 struct mtk_iommu_domain *dom = to_mtk_domain(domain);
713 struct list_head *hw_list = data->hw_list;
714 struct device *m4udev = data->dev;
715 struct mtk_iommu_bank_data *bank;
716 unsigned int bankid;
717 int ret, region_id;
718
719 region_id = mtk_iommu_get_iova_region_id(dev, data->plat_data);
720 if (region_id < 0)
721 return region_id;
722
723 bankid = mtk_iommu_get_bank_id(dev, data->plat_data);
724 mutex_lock(&dom->mutex);
725 if (!dom->bank) {
726 /* Data is in the frstdata in sharing pgtable case. */
727 frstdata = mtk_iommu_get_frst_data(hw_list);
728
729 mutex_lock(&frstdata->mutex);
730 ret = mtk_iommu_domain_finalise(dom, frstdata, region_id);
731 mutex_unlock(&frstdata->mutex);
732 if (ret) {
733 mutex_unlock(&dom->mutex);
734 return ret;
735 }
736 dom->bank = &data->bank[bankid];
737 }
738 mutex_unlock(&dom->mutex);
739
740 mutex_lock(&data->mutex);
741 bank = &data->bank[bankid];
742 if (!bank->m4u_dom) { /* Initialize the M4U HW for each a BANK */
743 ret = pm_runtime_resume_and_get(m4udev);
744 if (ret < 0) {
745 dev_err(m4udev, "pm get fail(%d) in attach.\n", ret);
746 goto err_unlock;
747 }
748
749 ret = mtk_iommu_hw_init(data, bankid);
750 if (ret) {
751 pm_runtime_put(m4udev);
752 goto err_unlock;
753 }
754 bank->m4u_dom = dom;
755 writel(dom->cfg.arm_v7s_cfg.ttbr, bank->base + REG_MMU_PT_BASE_ADDR);
756
757 pm_runtime_put(m4udev);
758 }
759 mutex_unlock(&data->mutex);
760
761 if (region_id > 0) {
762 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(34));
763 if (ret) {
764 dev_err(m4udev, "Failed to set dma_mask for %s(%d).\n", dev_name(dev), ret);
765 return ret;
766 }
767 }
768
769 return mtk_iommu_config(data, dev, true, region_id);
770
771 err_unlock:
772 mutex_unlock(&data->mutex);
773 return ret;
774 }
775
mtk_iommu_identity_attach(struct iommu_domain * identity_domain,struct device * dev)776 static int mtk_iommu_identity_attach(struct iommu_domain *identity_domain,
777 struct device *dev)
778 {
779 struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
780 struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
781
782 if (domain == identity_domain || !domain)
783 return 0;
784
785 mtk_iommu_config(data, dev, false, 0);
786 return 0;
787 }
788
789 static struct iommu_domain_ops mtk_iommu_identity_ops = {
790 .attach_dev = mtk_iommu_identity_attach,
791 };
792
793 static struct iommu_domain mtk_iommu_identity_domain = {
794 .type = IOMMU_DOMAIN_IDENTITY,
795 .ops = &mtk_iommu_identity_ops,
796 };
797
mtk_iommu_map(struct iommu_domain * domain,unsigned long iova,phys_addr_t paddr,size_t pgsize,size_t pgcount,int prot,gfp_t gfp,size_t * mapped)798 static int mtk_iommu_map(struct iommu_domain *domain, unsigned long iova,
799 phys_addr_t paddr, size_t pgsize, size_t pgcount,
800 int prot, gfp_t gfp, size_t *mapped)
801 {
802 struct mtk_iommu_domain *dom = to_mtk_domain(domain);
803
804 /* The "4GB mode" M4U physically can not use the lower remap of Dram. */
805 if (dom->bank->parent_data->enable_4GB)
806 paddr |= BIT_ULL(32);
807
808 /* Synchronize with the tlb_lock */
809 return dom->iop->map_pages(dom->iop, iova, paddr, pgsize, pgcount, prot, gfp, mapped);
810 }
811
mtk_iommu_unmap(struct iommu_domain * domain,unsigned long iova,size_t pgsize,size_t pgcount,struct iommu_iotlb_gather * gather)812 static size_t mtk_iommu_unmap(struct iommu_domain *domain,
813 unsigned long iova, size_t pgsize, size_t pgcount,
814 struct iommu_iotlb_gather *gather)
815 {
816 struct mtk_iommu_domain *dom = to_mtk_domain(domain);
817
818 iommu_iotlb_gather_add_range(gather, iova, pgsize * pgcount);
819 return dom->iop->unmap_pages(dom->iop, iova, pgsize, pgcount, gather);
820 }
821
mtk_iommu_flush_iotlb_all(struct iommu_domain * domain)822 static void mtk_iommu_flush_iotlb_all(struct iommu_domain *domain)
823 {
824 struct mtk_iommu_domain *dom = to_mtk_domain(domain);
825
826 if (dom->bank)
827 mtk_iommu_tlb_flush_all(dom->bank->parent_data);
828 }
829
mtk_iommu_iotlb_sync(struct iommu_domain * domain,struct iommu_iotlb_gather * gather)830 static void mtk_iommu_iotlb_sync(struct iommu_domain *domain,
831 struct iommu_iotlb_gather *gather)
832 {
833 struct mtk_iommu_domain *dom = to_mtk_domain(domain);
834 size_t length = gather->end - gather->start + 1;
835
836 mtk_iommu_tlb_flush_range_sync(gather->start, length, dom->bank);
837 }
838
mtk_iommu_sync_map(struct iommu_domain * domain,unsigned long iova,size_t size)839 static int mtk_iommu_sync_map(struct iommu_domain *domain, unsigned long iova,
840 size_t size)
841 {
842 struct mtk_iommu_domain *dom = to_mtk_domain(domain);
843
844 mtk_iommu_tlb_flush_range_sync(iova, size, dom->bank);
845 return 0;
846 }
847
mtk_iommu_iova_to_phys(struct iommu_domain * domain,dma_addr_t iova)848 static phys_addr_t mtk_iommu_iova_to_phys(struct iommu_domain *domain,
849 dma_addr_t iova)
850 {
851 struct mtk_iommu_domain *dom = to_mtk_domain(domain);
852 phys_addr_t pa;
853
854 pa = dom->iop->iova_to_phys(dom->iop, iova);
855 if (IS_ENABLED(CONFIG_PHYS_ADDR_T_64BIT) &&
856 dom->bank->parent_data->enable_4GB &&
857 pa >= MTK_IOMMU_4GB_MODE_REMAP_BASE)
858 pa &= ~BIT_ULL(32);
859
860 return pa;
861 }
862
mtk_iommu_probe_device(struct device * dev)863 static struct iommu_device *mtk_iommu_probe_device(struct device *dev)
864 {
865 struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
866 struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
867 struct device_link *link;
868 struct device *larbdev;
869 unsigned int larbid, larbidx, i;
870
871 if (!MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM))
872 return &data->iommu;
873
874 /*
875 * Link the consumer device with the smi-larb device(supplier).
876 * The device that connects with each a larb is a independent HW.
877 * All the ports in each a device should be in the same larbs.
878 */
879 larbid = MTK_M4U_TO_LARB(fwspec->ids[0]);
880 if (larbid >= MTK_LARB_NR_MAX)
881 return ERR_PTR(-EINVAL);
882
883 for (i = 1; i < fwspec->num_ids; i++) {
884 larbidx = MTK_M4U_TO_LARB(fwspec->ids[i]);
885 if (larbid != larbidx) {
886 dev_err(dev, "Can only use one larb. Fail@larb%d-%d.\n",
887 larbid, larbidx);
888 return ERR_PTR(-EINVAL);
889 }
890 }
891 larbdev = data->larb_imu[larbid].dev;
892 if (!larbdev)
893 return ERR_PTR(-EINVAL);
894
895 link = device_link_add(dev, larbdev,
896 DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS);
897 if (!link)
898 dev_err(dev, "Unable to link %s\n", dev_name(larbdev));
899 return &data->iommu;
900 }
901
mtk_iommu_release_device(struct device * dev)902 static void mtk_iommu_release_device(struct device *dev)
903 {
904 struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
905 struct mtk_iommu_data *data;
906 struct device *larbdev;
907 unsigned int larbid;
908
909 data = dev_iommu_priv_get(dev);
910 if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) {
911 larbid = MTK_M4U_TO_LARB(fwspec->ids[0]);
912 larbdev = data->larb_imu[larbid].dev;
913 device_link_remove(dev, larbdev);
914 }
915 }
916
mtk_iommu_get_group_id(struct device * dev,const struct mtk_iommu_plat_data * plat_data)917 static int mtk_iommu_get_group_id(struct device *dev, const struct mtk_iommu_plat_data *plat_data)
918 {
919 unsigned int bankid;
920
921 /*
922 * If the bank function is enabled, each bank is a iommu group/domain.
923 * Otherwise, each iova region is a iommu group/domain.
924 */
925 bankid = mtk_iommu_get_bank_id(dev, plat_data);
926 if (bankid)
927 return bankid;
928
929 return mtk_iommu_get_iova_region_id(dev, plat_data);
930 }
931
mtk_iommu_device_group(struct device * dev)932 static struct iommu_group *mtk_iommu_device_group(struct device *dev)
933 {
934 struct mtk_iommu_data *c_data = dev_iommu_priv_get(dev), *data;
935 struct list_head *hw_list = c_data->hw_list;
936 struct iommu_group *group;
937 int groupid;
938
939 data = mtk_iommu_get_frst_data(hw_list);
940 if (!data)
941 return ERR_PTR(-ENODEV);
942
943 groupid = mtk_iommu_get_group_id(dev, data->plat_data);
944 if (groupid < 0)
945 return ERR_PTR(groupid);
946
947 mutex_lock(&data->mutex);
948 group = data->m4u_group[groupid];
949 if (!group) {
950 group = iommu_group_alloc();
951 if (!IS_ERR(group))
952 data->m4u_group[groupid] = group;
953 } else {
954 iommu_group_ref_get(group);
955 }
956 mutex_unlock(&data->mutex);
957 return group;
958 }
959
mtk_iommu_of_xlate(struct device * dev,const struct of_phandle_args * args)960 static int mtk_iommu_of_xlate(struct device *dev,
961 const struct of_phandle_args *args)
962 {
963 struct platform_device *m4updev;
964
965 if (args->args_count != 1) {
966 dev_err(dev, "invalid #iommu-cells(%d) property for IOMMU\n",
967 args->args_count);
968 return -EINVAL;
969 }
970
971 if (!dev_iommu_priv_get(dev)) {
972 /* Get the m4u device */
973 m4updev = of_find_device_by_node(args->np);
974 if (WARN_ON(!m4updev))
975 return -EINVAL;
976
977 dev_iommu_priv_set(dev, platform_get_drvdata(m4updev));
978 }
979
980 return iommu_fwspec_add_ids(dev, args->args, 1);
981 }
982
mtk_iommu_get_resv_regions(struct device * dev,struct list_head * head)983 static void mtk_iommu_get_resv_regions(struct device *dev,
984 struct list_head *head)
985 {
986 struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
987 unsigned int regionid = mtk_iommu_get_iova_region_id(dev, data->plat_data), i;
988 const struct mtk_iommu_iova_region *resv, *curdom;
989 struct iommu_resv_region *region;
990 int prot = IOMMU_WRITE | IOMMU_READ;
991
992 if ((int)regionid < 0)
993 return;
994 curdom = data->plat_data->iova_region + regionid;
995 for (i = 0; i < data->plat_data->iova_region_nr; i++) {
996 resv = data->plat_data->iova_region + i;
997
998 /* Only reserve when the region is inside the current domain */
999 if (resv->iova_base <= curdom->iova_base ||
1000 resv->iova_base + resv->size >= curdom->iova_base + curdom->size)
1001 continue;
1002
1003 region = iommu_alloc_resv_region(resv->iova_base, resv->size,
1004 prot, IOMMU_RESV_RESERVED,
1005 GFP_KERNEL);
1006 if (!region)
1007 return;
1008
1009 list_add_tail(®ion->list, head);
1010 }
1011 }
1012
1013 static const struct iommu_ops mtk_iommu_ops = {
1014 .identity_domain = &mtk_iommu_identity_domain,
1015 .domain_alloc_paging = mtk_iommu_domain_alloc_paging,
1016 .probe_device = mtk_iommu_probe_device,
1017 .release_device = mtk_iommu_release_device,
1018 .device_group = mtk_iommu_device_group,
1019 .of_xlate = mtk_iommu_of_xlate,
1020 .get_resv_regions = mtk_iommu_get_resv_regions,
1021 .pgsize_bitmap = SZ_4K | SZ_64K | SZ_1M | SZ_16M,
1022 .owner = THIS_MODULE,
1023 .default_domain_ops = &(const struct iommu_domain_ops) {
1024 .attach_dev = mtk_iommu_attach_device,
1025 .map_pages = mtk_iommu_map,
1026 .unmap_pages = mtk_iommu_unmap,
1027 .flush_iotlb_all = mtk_iommu_flush_iotlb_all,
1028 .iotlb_sync = mtk_iommu_iotlb_sync,
1029 .iotlb_sync_map = mtk_iommu_sync_map,
1030 .iova_to_phys = mtk_iommu_iova_to_phys,
1031 .free = mtk_iommu_domain_free,
1032 }
1033 };
1034
mtk_iommu_hw_init(const struct mtk_iommu_data * data,unsigned int bankid)1035 static int mtk_iommu_hw_init(const struct mtk_iommu_data *data, unsigned int bankid)
1036 {
1037 const struct mtk_iommu_bank_data *bankx = &data->bank[bankid];
1038 const struct mtk_iommu_bank_data *bank0 = &data->bank[0];
1039 u32 regval;
1040
1041 /*
1042 * Global control settings are in bank0. May re-init these global registers
1043 * since no sure if there is bank0 consumers.
1044 */
1045 if (MTK_IOMMU_HAS_FLAG(data->plat_data, TF_PORT_TO_ADDR_MT8173)) {
1046 regval = F_MMU_PREFETCH_RT_REPLACE_MOD |
1047 F_MMU_TF_PROT_TO_PROGRAM_ADDR_MT8173;
1048 } else {
1049 regval = readl_relaxed(bank0->base + REG_MMU_CTRL_REG);
1050 regval |= F_MMU_TF_PROT_TO_PROGRAM_ADDR;
1051 }
1052 writel_relaxed(regval, bank0->base + REG_MMU_CTRL_REG);
1053
1054 if (data->enable_4GB &&
1055 MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_VLD_PA_RNG)) {
1056 /*
1057 * If 4GB mode is enabled, the validate PA range is from
1058 * 0x1_0000_0000 to 0x1_ffff_ffff. here record bit[32:30].
1059 */
1060 regval = F_MMU_VLD_PA_RNG(7, 4);
1061 writel_relaxed(regval, bank0->base + REG_MMU_VLD_PA_RNG);
1062 }
1063 if (MTK_IOMMU_HAS_FLAG(data->plat_data, DCM_DISABLE))
1064 writel_relaxed(F_MMU_DCM, bank0->base + REG_MMU_DCM_DIS);
1065 else
1066 writel_relaxed(0, bank0->base + REG_MMU_DCM_DIS);
1067
1068 if (MTK_IOMMU_HAS_FLAG(data->plat_data, WR_THROT_EN)) {
1069 /* write command throttling mode */
1070 regval = readl_relaxed(bank0->base + REG_MMU_WR_LEN_CTRL);
1071 regval &= ~F_MMU_WR_THROT_DIS_MASK;
1072 writel_relaxed(regval, bank0->base + REG_MMU_WR_LEN_CTRL);
1073 }
1074
1075 if (MTK_IOMMU_HAS_FLAG(data->plat_data, RESET_AXI)) {
1076 /* The register is called STANDARD_AXI_MODE in this case */
1077 regval = 0;
1078 } else {
1079 regval = readl_relaxed(bank0->base + REG_MMU_MISC_CTRL);
1080 if (!MTK_IOMMU_HAS_FLAG(data->plat_data, STD_AXI_MODE))
1081 regval &= ~F_MMU_STANDARD_AXI_MODE_MASK;
1082 if (MTK_IOMMU_HAS_FLAG(data->plat_data, OUT_ORDER_WR_EN))
1083 regval &= ~F_MMU_IN_ORDER_WR_EN_MASK;
1084 }
1085 writel_relaxed(regval, bank0->base + REG_MMU_MISC_CTRL);
1086
1087 /* Independent settings for each bank */
1088 regval = F_L2_MULIT_HIT_EN |
1089 F_TABLE_WALK_FAULT_INT_EN |
1090 F_PREETCH_FIFO_OVERFLOW_INT_EN |
1091 F_MISS_FIFO_OVERFLOW_INT_EN |
1092 F_PREFETCH_FIFO_ERR_INT_EN |
1093 F_MISS_FIFO_ERR_INT_EN;
1094 writel_relaxed(regval, bankx->base + REG_MMU_INT_CONTROL0);
1095
1096 regval = F_INT_TRANSLATION_FAULT |
1097 F_INT_MAIN_MULTI_HIT_FAULT |
1098 F_INT_INVALID_PA_FAULT |
1099 F_INT_ENTRY_REPLACEMENT_FAULT |
1100 F_INT_TLB_MISS_FAULT |
1101 F_INT_MISS_TRANSACTION_FIFO_FAULT |
1102 F_INT_PRETETCH_TRANSATION_FIFO_FAULT;
1103 writel_relaxed(regval, bankx->base + REG_MMU_INT_MAIN_CONTROL);
1104
1105 if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_LEGACY_IVRP_PADDR))
1106 regval = (data->protect_base >> 1) | (data->enable_4GB << 31);
1107 else
1108 regval = lower_32_bits(data->protect_base) |
1109 upper_32_bits(data->protect_base);
1110 writel_relaxed(regval, bankx->base + REG_MMU_IVRP_PADDR);
1111
1112 if (devm_request_irq(bankx->parent_dev, bankx->irq, mtk_iommu_isr, 0,
1113 dev_name(bankx->parent_dev), (void *)bankx)) {
1114 writel_relaxed(0, bankx->base + REG_MMU_PT_BASE_ADDR);
1115 dev_err(bankx->parent_dev, "Failed @ IRQ-%d Request\n", bankx->irq);
1116 return -ENODEV;
1117 }
1118
1119 return 0;
1120 }
1121
1122 static const struct component_master_ops mtk_iommu_com_ops = {
1123 .bind = mtk_iommu_bind,
1124 .unbind = mtk_iommu_unbind,
1125 };
1126
mtk_iommu_mm_dts_parse(struct device * dev,struct component_match ** match,struct mtk_iommu_data * data)1127 static int mtk_iommu_mm_dts_parse(struct device *dev, struct component_match **match,
1128 struct mtk_iommu_data *data)
1129 {
1130 struct device_node *larbnode, *frst_avail_smicomm_node = NULL;
1131 struct platform_device *plarbdev, *pcommdev;
1132 struct device_link *link;
1133 int i, larb_nr, ret;
1134
1135 larb_nr = of_count_phandle_with_args(dev->of_node, "mediatek,larbs", NULL);
1136 if (larb_nr < 0)
1137 return larb_nr;
1138 if (larb_nr == 0 || larb_nr > MTK_LARB_NR_MAX)
1139 return -EINVAL;
1140
1141 for (i = 0; i < larb_nr; i++) {
1142 struct device_node *smicomm_node, *smi_subcomm_node;
1143 u32 id;
1144
1145 larbnode = of_parse_phandle(dev->of_node, "mediatek,larbs", i);
1146 if (!larbnode) {
1147 ret = -EINVAL;
1148 goto err_larbdev_put;
1149 }
1150
1151 if (!of_device_is_available(larbnode)) {
1152 of_node_put(larbnode);
1153 continue;
1154 }
1155
1156 ret = of_property_read_u32(larbnode, "mediatek,larb-id", &id);
1157 if (ret)/* The id is consecutive if there is no this property */
1158 id = i;
1159 if (id >= MTK_LARB_NR_MAX) {
1160 of_node_put(larbnode);
1161 ret = -EINVAL;
1162 goto err_larbdev_put;
1163 }
1164
1165 plarbdev = of_find_device_by_node(larbnode);
1166 of_node_put(larbnode);
1167 if (!plarbdev) {
1168 ret = -ENODEV;
1169 goto err_larbdev_put;
1170 }
1171 if (data->larb_imu[id].dev) {
1172 platform_device_put(plarbdev);
1173 ret = -EEXIST;
1174 goto err_larbdev_put;
1175 }
1176 data->larb_imu[id].dev = &plarbdev->dev;
1177
1178 if (!plarbdev->dev.driver) {
1179 ret = -EPROBE_DEFER;
1180 goto err_larbdev_put;
1181 }
1182
1183 /* Get smi-(sub)-common dev from the last larb. */
1184 smi_subcomm_node = of_parse_phandle(larbnode, "mediatek,smi", 0);
1185 if (!smi_subcomm_node) {
1186 ret = -EINVAL;
1187 goto err_larbdev_put;
1188 }
1189
1190 /*
1191 * It may have two level smi-common. the node is smi-sub-common if it
1192 * has a new mediatek,smi property. otherwise it is smi-commmon.
1193 */
1194 smicomm_node = of_parse_phandle(smi_subcomm_node, "mediatek,smi", 0);
1195 if (smicomm_node)
1196 of_node_put(smi_subcomm_node);
1197 else
1198 smicomm_node = smi_subcomm_node;
1199
1200 /*
1201 * All the larbs that connect to one IOMMU must connect with the same
1202 * smi-common.
1203 */
1204 if (!frst_avail_smicomm_node) {
1205 frst_avail_smicomm_node = smicomm_node;
1206 } else if (frst_avail_smicomm_node != smicomm_node) {
1207 dev_err(dev, "mediatek,smi property is not right @larb%d.", id);
1208 of_node_put(smicomm_node);
1209 ret = -EINVAL;
1210 goto err_larbdev_put;
1211 } else {
1212 of_node_put(smicomm_node);
1213 }
1214
1215 component_match_add(dev, match, component_compare_dev, &plarbdev->dev);
1216 platform_device_put(plarbdev);
1217 }
1218
1219 if (!frst_avail_smicomm_node)
1220 return -EINVAL;
1221
1222 pcommdev = of_find_device_by_node(frst_avail_smicomm_node);
1223 of_node_put(frst_avail_smicomm_node);
1224 if (!pcommdev)
1225 return -ENODEV;
1226 data->smicomm_dev = &pcommdev->dev;
1227
1228 link = device_link_add(data->smicomm_dev, dev,
1229 DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME);
1230 platform_device_put(pcommdev);
1231 if (!link) {
1232 dev_err(dev, "Unable to link %s.\n", dev_name(data->smicomm_dev));
1233 return -EINVAL;
1234 }
1235 return 0;
1236
1237 err_larbdev_put:
1238 for (i = MTK_LARB_NR_MAX - 1; i >= 0; i--) {
1239 if (!data->larb_imu[i].dev)
1240 continue;
1241 put_device(data->larb_imu[i].dev);
1242 }
1243 return ret;
1244 }
1245
mtk_iommu_probe(struct platform_device * pdev)1246 static int mtk_iommu_probe(struct platform_device *pdev)
1247 {
1248 struct mtk_iommu_data *data;
1249 struct device *dev = &pdev->dev;
1250 struct resource *res;
1251 resource_size_t ioaddr;
1252 struct component_match *match = NULL;
1253 struct regmap *infracfg;
1254 void *protect;
1255 int ret, banks_num, i = 0;
1256 u32 val;
1257 char *p;
1258 struct mtk_iommu_bank_data *bank;
1259 void __iomem *base;
1260
1261 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
1262 if (!data)
1263 return -ENOMEM;
1264 data->dev = dev;
1265 data->plat_data = of_device_get_match_data(dev);
1266
1267 /* Protect memory. HW will access here while translation fault.*/
1268 protect = devm_kcalloc(dev, 2, MTK_PROTECT_PA_ALIGN, GFP_KERNEL);
1269 if (!protect)
1270 return -ENOMEM;
1271 data->protect_base = ALIGN(virt_to_phys(protect), MTK_PROTECT_PA_ALIGN);
1272
1273 if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_4GB_MODE)) {
1274 infracfg = syscon_regmap_lookup_by_phandle(dev->of_node, "mediatek,infracfg");
1275 if (IS_ERR(infracfg)) {
1276 /*
1277 * Legacy devicetrees will not specify a phandle to
1278 * mediatek,infracfg: in that case, we use the older
1279 * way to retrieve a syscon to infra.
1280 *
1281 * This is for retrocompatibility purposes only, hence
1282 * no more compatibles shall be added to this.
1283 */
1284 switch (data->plat_data->m4u_plat) {
1285 case M4U_MT2712:
1286 p = "mediatek,mt2712-infracfg";
1287 break;
1288 case M4U_MT8173:
1289 p = "mediatek,mt8173-infracfg";
1290 break;
1291 default:
1292 p = NULL;
1293 }
1294
1295 infracfg = syscon_regmap_lookup_by_compatible(p);
1296 if (IS_ERR(infracfg))
1297 return PTR_ERR(infracfg);
1298 }
1299
1300 ret = regmap_read(infracfg, REG_INFRA_MISC, &val);
1301 if (ret)
1302 return ret;
1303 data->enable_4GB = !!(val & F_DDR_4GB_SUPPORT_EN);
1304 }
1305
1306 banks_num = data->plat_data->banks_num;
1307 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1308 if (!res)
1309 return -EINVAL;
1310 if (resource_size(res) < banks_num * MTK_IOMMU_BANK_SZ) {
1311 dev_err(dev, "banknr %d. res %pR is not enough.\n", banks_num, res);
1312 return -EINVAL;
1313 }
1314 base = devm_ioremap_resource(dev, res);
1315 if (IS_ERR(base))
1316 return PTR_ERR(base);
1317 ioaddr = res->start;
1318
1319 data->bank = devm_kmalloc(dev, banks_num * sizeof(*data->bank), GFP_KERNEL);
1320 if (!data->bank)
1321 return -ENOMEM;
1322
1323 do {
1324 if (!data->plat_data->banks_enable[i])
1325 continue;
1326 bank = &data->bank[i];
1327 bank->id = i;
1328 bank->base = base + i * MTK_IOMMU_BANK_SZ;
1329 bank->m4u_dom = NULL;
1330
1331 bank->irq = platform_get_irq(pdev, i);
1332 if (bank->irq < 0)
1333 return bank->irq;
1334 bank->parent_dev = dev;
1335 bank->parent_data = data;
1336 spin_lock_init(&bank->tlb_lock);
1337 } while (++i < banks_num);
1338
1339 if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_BCLK)) {
1340 data->bclk = devm_clk_get(dev, "bclk");
1341 if (IS_ERR(data->bclk))
1342 return PTR_ERR(data->bclk);
1343 }
1344
1345 if (MTK_IOMMU_HAS_FLAG(data->plat_data, PGTABLE_PA_35_EN)) {
1346 ret = dma_set_mask(dev, DMA_BIT_MASK(35));
1347 if (ret) {
1348 dev_err(dev, "Failed to set dma_mask 35.\n");
1349 return ret;
1350 }
1351 }
1352
1353 pm_runtime_enable(dev);
1354
1355 if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) {
1356 ret = mtk_iommu_mm_dts_parse(dev, &match, data);
1357 if (ret) {
1358 dev_err_probe(dev, ret, "mm dts parse fail\n");
1359 goto out_runtime_disable;
1360 }
1361 } else if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_INFRA) &&
1362 !MTK_IOMMU_HAS_FLAG(data->plat_data, CFG_IFA_MASTER_IN_ATF)) {
1363 p = data->plat_data->pericfg_comp_str;
1364 data->pericfg = syscon_regmap_lookup_by_compatible(p);
1365 if (IS_ERR(data->pericfg)) {
1366 ret = PTR_ERR(data->pericfg);
1367 goto out_runtime_disable;
1368 }
1369 }
1370
1371 platform_set_drvdata(pdev, data);
1372 mutex_init(&data->mutex);
1373
1374 ret = iommu_device_sysfs_add(&data->iommu, dev, NULL,
1375 "mtk-iommu.%pa", &ioaddr);
1376 if (ret)
1377 goto out_link_remove;
1378
1379 ret = iommu_device_register(&data->iommu, &mtk_iommu_ops, dev);
1380 if (ret)
1381 goto out_sysfs_remove;
1382
1383 if (MTK_IOMMU_HAS_FLAG(data->plat_data, SHARE_PGTABLE)) {
1384 list_add_tail(&data->list, data->plat_data->hw_list);
1385 data->hw_list = data->plat_data->hw_list;
1386 } else {
1387 INIT_LIST_HEAD(&data->hw_list_head);
1388 list_add_tail(&data->list, &data->hw_list_head);
1389 data->hw_list = &data->hw_list_head;
1390 }
1391
1392 if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) {
1393 ret = component_master_add_with_match(dev, &mtk_iommu_com_ops, match);
1394 if (ret)
1395 goto out_list_del;
1396 }
1397 return ret;
1398
1399 out_list_del:
1400 list_del(&data->list);
1401 iommu_device_unregister(&data->iommu);
1402 out_sysfs_remove:
1403 iommu_device_sysfs_remove(&data->iommu);
1404 out_link_remove:
1405 if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM))
1406 device_link_remove(data->smicomm_dev, dev);
1407 out_runtime_disable:
1408 pm_runtime_disable(dev);
1409 return ret;
1410 }
1411
mtk_iommu_remove(struct platform_device * pdev)1412 static void mtk_iommu_remove(struct platform_device *pdev)
1413 {
1414 struct mtk_iommu_data *data = platform_get_drvdata(pdev);
1415 struct mtk_iommu_bank_data *bank;
1416 int i;
1417
1418 iommu_device_sysfs_remove(&data->iommu);
1419 iommu_device_unregister(&data->iommu);
1420
1421 list_del(&data->list);
1422
1423 if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) {
1424 device_link_remove(data->smicomm_dev, &pdev->dev);
1425 component_master_del(&pdev->dev, &mtk_iommu_com_ops);
1426 }
1427 pm_runtime_disable(&pdev->dev);
1428 for (i = 0; i < data->plat_data->banks_num; i++) {
1429 bank = &data->bank[i];
1430 if (!bank->m4u_dom)
1431 continue;
1432 devm_free_irq(&pdev->dev, bank->irq, bank);
1433 }
1434 }
1435
mtk_iommu_runtime_suspend(struct device * dev)1436 static int __maybe_unused mtk_iommu_runtime_suspend(struct device *dev)
1437 {
1438 struct mtk_iommu_data *data = dev_get_drvdata(dev);
1439 struct mtk_iommu_suspend_reg *reg = &data->reg;
1440 void __iomem *base;
1441 int i = 0;
1442
1443 base = data->bank[i].base;
1444 reg->wr_len_ctrl = readl_relaxed(base + REG_MMU_WR_LEN_CTRL);
1445 reg->misc_ctrl = readl_relaxed(base + REG_MMU_MISC_CTRL);
1446 reg->dcm_dis = readl_relaxed(base + REG_MMU_DCM_DIS);
1447 reg->ctrl_reg = readl_relaxed(base + REG_MMU_CTRL_REG);
1448 reg->vld_pa_rng = readl_relaxed(base + REG_MMU_VLD_PA_RNG);
1449 do {
1450 if (!data->plat_data->banks_enable[i])
1451 continue;
1452 base = data->bank[i].base;
1453 reg->int_control[i] = readl_relaxed(base + REG_MMU_INT_CONTROL0);
1454 reg->int_main_control[i] = readl_relaxed(base + REG_MMU_INT_MAIN_CONTROL);
1455 reg->ivrp_paddr[i] = readl_relaxed(base + REG_MMU_IVRP_PADDR);
1456 } while (++i < data->plat_data->banks_num);
1457 clk_disable_unprepare(data->bclk);
1458 return 0;
1459 }
1460
mtk_iommu_runtime_resume(struct device * dev)1461 static int __maybe_unused mtk_iommu_runtime_resume(struct device *dev)
1462 {
1463 struct mtk_iommu_data *data = dev_get_drvdata(dev);
1464 struct mtk_iommu_suspend_reg *reg = &data->reg;
1465 struct mtk_iommu_domain *m4u_dom;
1466 void __iomem *base;
1467 int ret, i = 0;
1468
1469 ret = clk_prepare_enable(data->bclk);
1470 if (ret) {
1471 dev_err(data->dev, "Failed to enable clk(%d) in resume\n", ret);
1472 return ret;
1473 }
1474
1475 /*
1476 * Uppon first resume, only enable the clk and return, since the values of the
1477 * registers are not yet set.
1478 */
1479 if (!reg->wr_len_ctrl)
1480 return 0;
1481
1482 base = data->bank[i].base;
1483 writel_relaxed(reg->wr_len_ctrl, base + REG_MMU_WR_LEN_CTRL);
1484 writel_relaxed(reg->misc_ctrl, base + REG_MMU_MISC_CTRL);
1485 writel_relaxed(reg->dcm_dis, base + REG_MMU_DCM_DIS);
1486 writel_relaxed(reg->ctrl_reg, base + REG_MMU_CTRL_REG);
1487 writel_relaxed(reg->vld_pa_rng, base + REG_MMU_VLD_PA_RNG);
1488 do {
1489 m4u_dom = data->bank[i].m4u_dom;
1490 if (!data->plat_data->banks_enable[i] || !m4u_dom)
1491 continue;
1492 base = data->bank[i].base;
1493 writel_relaxed(reg->int_control[i], base + REG_MMU_INT_CONTROL0);
1494 writel_relaxed(reg->int_main_control[i], base + REG_MMU_INT_MAIN_CONTROL);
1495 writel_relaxed(reg->ivrp_paddr[i], base + REG_MMU_IVRP_PADDR);
1496 writel(m4u_dom->cfg.arm_v7s_cfg.ttbr, base + REG_MMU_PT_BASE_ADDR);
1497 } while (++i < data->plat_data->banks_num);
1498
1499 /*
1500 * Users may allocate dma buffer before they call pm_runtime_get,
1501 * in which case it will lack the necessary tlb flush.
1502 * Thus, make sure to update the tlb after each PM resume.
1503 */
1504 mtk_iommu_tlb_flush_all(data);
1505 return 0;
1506 }
1507
1508 static const struct dev_pm_ops mtk_iommu_pm_ops = {
1509 SET_RUNTIME_PM_OPS(mtk_iommu_runtime_suspend, mtk_iommu_runtime_resume, NULL)
1510 SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1511 pm_runtime_force_resume)
1512 };
1513
1514 static const struct mtk_iommu_plat_data mt2712_data = {
1515 .m4u_plat = M4U_MT2712,
1516 .flags = HAS_4GB_MODE | HAS_BCLK | HAS_VLD_PA_RNG | SHARE_PGTABLE |
1517 MTK_IOMMU_TYPE_MM,
1518 .hw_list = &m4ulist,
1519 .inv_sel_reg = REG_MMU_INV_SEL_GEN1,
1520 .iova_region = single_domain,
1521 .banks_num = 1,
1522 .banks_enable = {true},
1523 .iova_region_nr = ARRAY_SIZE(single_domain),
1524 .larbid_remap = {{0}, {1}, {2}, {3}, {4}, {5}, {6}, {7}},
1525 };
1526
1527 static const struct mtk_iommu_plat_data mt6779_data = {
1528 .m4u_plat = M4U_MT6779,
1529 .flags = HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN | WR_THROT_EN |
1530 MTK_IOMMU_TYPE_MM | PGTABLE_PA_35_EN,
1531 .inv_sel_reg = REG_MMU_INV_SEL_GEN2,
1532 .banks_num = 1,
1533 .banks_enable = {true},
1534 .iova_region = single_domain,
1535 .iova_region_nr = ARRAY_SIZE(single_domain),
1536 .larbid_remap = {{0}, {1}, {2}, {3}, {5}, {7, 8}, {10}, {9}},
1537 };
1538
1539 static const struct mtk_iommu_plat_data mt6795_data = {
1540 .m4u_plat = M4U_MT6795,
1541 .flags = HAS_4GB_MODE | HAS_BCLK | RESET_AXI |
1542 HAS_LEGACY_IVRP_PADDR | MTK_IOMMU_TYPE_MM |
1543 TF_PORT_TO_ADDR_MT8173,
1544 .inv_sel_reg = REG_MMU_INV_SEL_GEN1,
1545 .banks_num = 1,
1546 .banks_enable = {true},
1547 .iova_region = single_domain,
1548 .iova_region_nr = ARRAY_SIZE(single_domain),
1549 .larbid_remap = {{0}, {1}, {2}, {3}, {4}}, /* Linear mapping. */
1550 };
1551
1552 static const struct mtk_iommu_plat_data mt8167_data = {
1553 .m4u_plat = M4U_MT8167,
1554 .flags = RESET_AXI | HAS_LEGACY_IVRP_PADDR | MTK_IOMMU_TYPE_MM,
1555 .inv_sel_reg = REG_MMU_INV_SEL_GEN1,
1556 .banks_num = 1,
1557 .banks_enable = {true},
1558 .iova_region = single_domain,
1559 .iova_region_nr = ARRAY_SIZE(single_domain),
1560 .larbid_remap = {{0}, {1}, {2}}, /* Linear mapping. */
1561 };
1562
1563 static const struct mtk_iommu_plat_data mt8173_data = {
1564 .m4u_plat = M4U_MT8173,
1565 .flags = HAS_4GB_MODE | HAS_BCLK | RESET_AXI |
1566 HAS_LEGACY_IVRP_PADDR | MTK_IOMMU_TYPE_MM |
1567 TF_PORT_TO_ADDR_MT8173,
1568 .inv_sel_reg = REG_MMU_INV_SEL_GEN1,
1569 .banks_num = 1,
1570 .banks_enable = {true},
1571 .iova_region = single_domain,
1572 .iova_region_nr = ARRAY_SIZE(single_domain),
1573 .larbid_remap = {{0}, {1}, {2}, {3}, {4}, {5}}, /* Linear mapping. */
1574 };
1575
1576 static const struct mtk_iommu_plat_data mt8183_data = {
1577 .m4u_plat = M4U_MT8183,
1578 .flags = RESET_AXI | MTK_IOMMU_TYPE_MM,
1579 .inv_sel_reg = REG_MMU_INV_SEL_GEN1,
1580 .banks_num = 1,
1581 .banks_enable = {true},
1582 .iova_region = single_domain,
1583 .iova_region_nr = ARRAY_SIZE(single_domain),
1584 .larbid_remap = {{0}, {4}, {5}, {6}, {7}, {2}, {3}, {1}},
1585 };
1586
1587 static const unsigned int mt8186_larb_region_msk[MT8192_MULTI_REGION_NR_MAX][MTK_LARB_NR_MAX] = {
1588 [0] = {~0, ~0, ~0}, /* Region0: all ports for larb0/1/2 */
1589 [1] = {0, 0, 0, 0, ~0, 0, 0, ~0}, /* Region1: larb4/7 */
1590 [2] = {0, 0, 0, 0, 0, 0, 0, 0, /* Region2: larb8/9/11/13/16/17/19/20 */
1591 ~0, ~0, 0, ~0, 0, ~(u32)(BIT(9) | BIT(10)), 0, 0,
1592 /* larb13: the other ports except port9/10 */
1593 ~0, ~0, 0, ~0, ~0},
1594 [3] = {0},
1595 [4] = {[13] = BIT(9) | BIT(10)}, /* larb13 port9/10 */
1596 [5] = {[14] = ~0}, /* larb14 */
1597 };
1598
1599 static const struct mtk_iommu_plat_data mt8186_data_mm = {
1600 .m4u_plat = M4U_MT8186,
1601 .flags = HAS_BCLK | HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN |
1602 WR_THROT_EN | IOVA_34_EN | MTK_IOMMU_TYPE_MM,
1603 .larbid_remap = {{0}, {1, MTK_INVALID_LARBID, 8}, {4}, {7}, {2}, {9, 11, 19, 20},
1604 {MTK_INVALID_LARBID, 14, 16},
1605 {MTK_INVALID_LARBID, 13, MTK_INVALID_LARBID, 17}},
1606 .inv_sel_reg = REG_MMU_INV_SEL_GEN2,
1607 .banks_num = 1,
1608 .banks_enable = {true},
1609 .iova_region = mt8192_multi_dom,
1610 .iova_region_nr = ARRAY_SIZE(mt8192_multi_dom),
1611 .iova_region_larb_msk = mt8186_larb_region_msk,
1612 };
1613
1614 static const struct mtk_iommu_plat_data mt8188_data_infra = {
1615 .m4u_plat = M4U_MT8188,
1616 .flags = WR_THROT_EN | DCM_DISABLE | STD_AXI_MODE | PM_CLK_AO |
1617 MTK_IOMMU_TYPE_INFRA | IFA_IOMMU_PCIE_SUPPORT |
1618 PGTABLE_PA_35_EN | CFG_IFA_MASTER_IN_ATF,
1619 .inv_sel_reg = REG_MMU_INV_SEL_GEN2,
1620 .banks_num = 1,
1621 .banks_enable = {true},
1622 .iova_region = single_domain,
1623 .iova_region_nr = ARRAY_SIZE(single_domain),
1624 };
1625
1626 static const u32 mt8188_larb_region_msk[MT8192_MULTI_REGION_NR_MAX][MTK_LARB_NR_MAX] = {
1627 [0] = {~0, ~0, ~0, ~0}, /* Region0: all ports for larb0/1/2/3 */
1628 [1] = {0, 0, 0, 0, 0, 0, 0, 0,
1629 0, 0, 0, 0, 0, 0, 0, 0,
1630 0, 0, 0, 0, 0, ~0, ~0, ~0}, /* Region1: larb19(21)/21(22)/23 */
1631 [2] = {0, 0, 0, 0, ~0, ~0, ~0, ~0, /* Region2: the other larbs. */
1632 ~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0,
1633 ~0, ~0, ~0, ~0, ~0, 0, 0, 0,
1634 0, ~0},
1635 [3] = {0},
1636 [4] = {[24] = BIT(0) | BIT(1)}, /* Only larb27(24) port0/1 */
1637 [5] = {[24] = BIT(2) | BIT(3)}, /* Only larb27(24) port2/3 */
1638 };
1639
1640 static const struct mtk_iommu_plat_data mt8188_data_vdo = {
1641 .m4u_plat = M4U_MT8188,
1642 .flags = HAS_BCLK | HAS_SUB_COMM_3BITS | OUT_ORDER_WR_EN |
1643 WR_THROT_EN | IOVA_34_EN | SHARE_PGTABLE |
1644 PGTABLE_PA_35_EN | MTK_IOMMU_TYPE_MM,
1645 .hw_list = &m4ulist,
1646 .inv_sel_reg = REG_MMU_INV_SEL_GEN2,
1647 .banks_num = 1,
1648 .banks_enable = {true},
1649 .iova_region = mt8192_multi_dom,
1650 .iova_region_nr = ARRAY_SIZE(mt8192_multi_dom),
1651 .iova_region_larb_msk = mt8188_larb_region_msk,
1652 .larbid_remap = {{2}, {0}, {21}, {0}, {19}, {9, 10,
1653 11 /* 11a */, 25 /* 11c */},
1654 {13, 0, 29 /* 16b */, 30 /* 17b */, 0}, {5}},
1655 };
1656
1657 static const struct mtk_iommu_plat_data mt8188_data_vpp = {
1658 .m4u_plat = M4U_MT8188,
1659 .flags = HAS_BCLK | HAS_SUB_COMM_3BITS | OUT_ORDER_WR_EN |
1660 WR_THROT_EN | IOVA_34_EN | SHARE_PGTABLE |
1661 PGTABLE_PA_35_EN | MTK_IOMMU_TYPE_MM,
1662 .hw_list = &m4ulist,
1663 .inv_sel_reg = REG_MMU_INV_SEL_GEN2,
1664 .banks_num = 1,
1665 .banks_enable = {true},
1666 .iova_region = mt8192_multi_dom,
1667 .iova_region_nr = ARRAY_SIZE(mt8192_multi_dom),
1668 .iova_region_larb_msk = mt8188_larb_region_msk,
1669 .larbid_remap = {{1}, {3}, {23}, {7}, {MTK_INVALID_LARBID},
1670 {12, 15, 24 /* 11b */}, {14, MTK_INVALID_LARBID,
1671 16 /* 16a */, 17 /* 17a */, MTK_INVALID_LARBID,
1672 27, 28 /* ccu0 */, MTK_INVALID_LARBID}, {4, 6}},
1673 };
1674
1675 static const unsigned int mt8192_larb_region_msk[MT8192_MULTI_REGION_NR_MAX][MTK_LARB_NR_MAX] = {
1676 [0] = {~0, ~0}, /* Region0: larb0/1 */
1677 [1] = {0, 0, 0, 0, ~0, ~0, 0, ~0}, /* Region1: larb4/5/7 */
1678 [2] = {0, 0, ~0, 0, 0, 0, 0, 0, /* Region2: larb2/9/11/13/14/16/17/18/19/20 */
1679 0, ~0, 0, ~0, 0, ~(u32)(BIT(9) | BIT(10)), ~(u32)(BIT(4) | BIT(5)), 0,
1680 ~0, ~0, ~0, ~0, ~0},
1681 [3] = {0},
1682 [4] = {[13] = BIT(9) | BIT(10)}, /* larb13 port9/10 */
1683 [5] = {[14] = BIT(4) | BIT(5)}, /* larb14 port4/5 */
1684 };
1685
1686 static const struct mtk_iommu_plat_data mt8192_data = {
1687 .m4u_plat = M4U_MT8192,
1688 .flags = HAS_BCLK | HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN |
1689 WR_THROT_EN | IOVA_34_EN | MTK_IOMMU_TYPE_MM,
1690 .inv_sel_reg = REG_MMU_INV_SEL_GEN2,
1691 .banks_num = 1,
1692 .banks_enable = {true},
1693 .iova_region = mt8192_multi_dom,
1694 .iova_region_nr = ARRAY_SIZE(mt8192_multi_dom),
1695 .iova_region_larb_msk = mt8192_larb_region_msk,
1696 .larbid_remap = {{0}, {1}, {4, 5}, {7}, {2}, {9, 11, 19, 20},
1697 {0, 14, 16}, {0, 13, 18, 17}},
1698 };
1699
1700 static const struct mtk_iommu_plat_data mt8195_data_infra = {
1701 .m4u_plat = M4U_MT8195,
1702 .flags = WR_THROT_EN | DCM_DISABLE | STD_AXI_MODE | PM_CLK_AO |
1703 MTK_IOMMU_TYPE_INFRA | IFA_IOMMU_PCIE_SUPPORT,
1704 .pericfg_comp_str = "mediatek,mt8195-pericfg_ao",
1705 .inv_sel_reg = REG_MMU_INV_SEL_GEN2,
1706 .banks_num = 5,
1707 .banks_enable = {true, false, false, false, true},
1708 .banks_portmsk = {[0] = GENMASK(19, 16), /* PCIe */
1709 [4] = GENMASK(31, 20), /* USB */
1710 },
1711 .iova_region = single_domain,
1712 .iova_region_nr = ARRAY_SIZE(single_domain),
1713 };
1714
1715 static const unsigned int mt8195_larb_region_msk[MT8192_MULTI_REGION_NR_MAX][MTK_LARB_NR_MAX] = {
1716 [0] = {~0, ~0, ~0, ~0}, /* Region0: all ports for larb0/1/2/3 */
1717 [1] = {0, 0, 0, 0, 0, 0, 0, 0,
1718 0, 0, 0, 0, 0, 0, 0, 0,
1719 0, 0, 0, ~0, ~0, ~0, ~0, ~0, /* Region1: larb19/20/21/22/23/24 */
1720 ~0},
1721 [2] = {0, 0, 0, 0, ~0, ~0, ~0, ~0, /* Region2: the other larbs. */
1722 ~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0,
1723 ~0, ~0, 0, 0, 0, 0, 0, 0,
1724 0, ~0, ~0, ~0, ~0},
1725 [3] = {0},
1726 [4] = {[18] = BIT(0) | BIT(1)}, /* Only larb18 port0/1 */
1727 [5] = {[18] = BIT(2) | BIT(3)}, /* Only larb18 port2/3 */
1728 };
1729
1730 static const struct mtk_iommu_plat_data mt8195_data_vdo = {
1731 .m4u_plat = M4U_MT8195,
1732 .flags = HAS_BCLK | HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN |
1733 WR_THROT_EN | IOVA_34_EN | SHARE_PGTABLE | MTK_IOMMU_TYPE_MM,
1734 .hw_list = &m4ulist,
1735 .inv_sel_reg = REG_MMU_INV_SEL_GEN2,
1736 .banks_num = 1,
1737 .banks_enable = {true},
1738 .iova_region = mt8192_multi_dom,
1739 .iova_region_nr = ARRAY_SIZE(mt8192_multi_dom),
1740 .iova_region_larb_msk = mt8195_larb_region_msk,
1741 .larbid_remap = {{2, 0}, {21}, {24}, {7}, {19}, {9, 10, 11},
1742 {13, 17, 15/* 17b */, 25}, {5}},
1743 };
1744
1745 static const struct mtk_iommu_plat_data mt8195_data_vpp = {
1746 .m4u_plat = M4U_MT8195,
1747 .flags = HAS_BCLK | HAS_SUB_COMM_3BITS | OUT_ORDER_WR_EN |
1748 WR_THROT_EN | IOVA_34_EN | SHARE_PGTABLE | MTK_IOMMU_TYPE_MM,
1749 .hw_list = &m4ulist,
1750 .inv_sel_reg = REG_MMU_INV_SEL_GEN2,
1751 .banks_num = 1,
1752 .banks_enable = {true},
1753 .iova_region = mt8192_multi_dom,
1754 .iova_region_nr = ARRAY_SIZE(mt8192_multi_dom),
1755 .iova_region_larb_msk = mt8195_larb_region_msk,
1756 .larbid_remap = {{1}, {3},
1757 {22, MTK_INVALID_LARBID, MTK_INVALID_LARBID, MTK_INVALID_LARBID, 23},
1758 {8}, {20}, {12},
1759 /* 16: 16a; 29: 16b; 30: CCUtop0; 31: CCUtop1 */
1760 {14, 16, 29, 26, 30, 31, 18},
1761 {4, MTK_INVALID_LARBID, MTK_INVALID_LARBID, MTK_INVALID_LARBID, 6}},
1762 };
1763
1764 static const struct mtk_iommu_plat_data mt8365_data = {
1765 .m4u_plat = M4U_MT8365,
1766 .flags = RESET_AXI | INT_ID_PORT_WIDTH_6,
1767 .inv_sel_reg = REG_MMU_INV_SEL_GEN1,
1768 .banks_num = 1,
1769 .banks_enable = {true},
1770 .iova_region = single_domain,
1771 .iova_region_nr = ARRAY_SIZE(single_domain),
1772 .larbid_remap = {{0}, {1}, {2}, {3}, {4}, {5}}, /* Linear mapping. */
1773 };
1774
1775 static const struct of_device_id mtk_iommu_of_ids[] = {
1776 { .compatible = "mediatek,mt2712-m4u", .data = &mt2712_data},
1777 { .compatible = "mediatek,mt6779-m4u", .data = &mt6779_data},
1778 { .compatible = "mediatek,mt6795-m4u", .data = &mt6795_data},
1779 { .compatible = "mediatek,mt8167-m4u", .data = &mt8167_data},
1780 { .compatible = "mediatek,mt8173-m4u", .data = &mt8173_data},
1781 { .compatible = "mediatek,mt8183-m4u", .data = &mt8183_data},
1782 { .compatible = "mediatek,mt8186-iommu-mm", .data = &mt8186_data_mm}, /* mm: m4u */
1783 { .compatible = "mediatek,mt8188-iommu-infra", .data = &mt8188_data_infra},
1784 { .compatible = "mediatek,mt8188-iommu-vdo", .data = &mt8188_data_vdo},
1785 { .compatible = "mediatek,mt8188-iommu-vpp", .data = &mt8188_data_vpp},
1786 { .compatible = "mediatek,mt8192-m4u", .data = &mt8192_data},
1787 { .compatible = "mediatek,mt8195-iommu-infra", .data = &mt8195_data_infra},
1788 { .compatible = "mediatek,mt8195-iommu-vdo", .data = &mt8195_data_vdo},
1789 { .compatible = "mediatek,mt8195-iommu-vpp", .data = &mt8195_data_vpp},
1790 { .compatible = "mediatek,mt8365-m4u", .data = &mt8365_data},
1791 {}
1792 };
1793 MODULE_DEVICE_TABLE(of, mtk_iommu_of_ids);
1794
1795 static struct platform_driver mtk_iommu_driver = {
1796 .probe = mtk_iommu_probe,
1797 .remove_new = mtk_iommu_remove,
1798 .driver = {
1799 .name = "mtk-iommu",
1800 .of_match_table = mtk_iommu_of_ids,
1801 .pm = &mtk_iommu_pm_ops,
1802 }
1803 };
1804 module_platform_driver(mtk_iommu_driver);
1805
1806 MODULE_DESCRIPTION("IOMMU API for MediaTek M4U implementations");
1807 MODULE_LICENSE("GPL v2");
1808