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5
6#include <linux/bitfield.h>
7#include <linux/bug.h>
8#include <linux/clk.h>
9#include <linux/component.h>
10#include <linux/device.h>
11#include <linux/dma-direct.h>
12#include <linux/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/list.h>
18#include <linux/mfd/syscon.h>
19#include <linux/module.h>
20#include <linux/of_address.h>
21#include <linux/of_irq.h>
22#include <linux/of_platform.h>
23#include <linux/platform_device.h>
24#include <linux/pm_runtime.h>
25#include <linux/regmap.h>
26#include <linux/slab.h>
27#include <linux/spinlock.h>
28#include <linux/soc/mediatek/infracfg.h>
29#include <asm/barrier.h>
30#include <soc/mediatek/smi.h>
31
32#include "mtk_iommu.h"
33
34#define REG_MMU_PT_BASE_ADDR 0x000
35#define MMU_PT_ADDR_MASK GENMASK(31, 7)
36
37#define REG_MMU_INVALIDATE 0x020
38#define F_ALL_INVLD 0x2
39#define F_MMU_INV_RANGE 0x1
40
41#define REG_MMU_INVLD_START_A 0x024
42#define REG_MMU_INVLD_END_A 0x028
43
44#define REG_MMU_INV_SEL_GEN2 0x02c
45#define REG_MMU_INV_SEL_GEN1 0x038
46#define F_INVLD_EN0 BIT(0)
47#define F_INVLD_EN1 BIT(1)
48
49#define REG_MMU_MISC_CTRL 0x048
50#define F_MMU_IN_ORDER_WR_EN_MASK (BIT(1) | BIT(17))
51#define F_MMU_STANDARD_AXI_MODE_MASK (BIT(3) | BIT(19))
52
53#define REG_MMU_DCM_DIS 0x050
54#define REG_MMU_WR_LEN_CTRL 0x054
55#define F_MMU_WR_THROT_DIS_MASK (BIT(5) | BIT(21))
56
57#define REG_MMU_CTRL_REG 0x110
58#define F_MMU_TF_PROT_TO_PROGRAM_ADDR (2 << 4)
59#define F_MMU_PREFETCH_RT_REPLACE_MOD BIT(4)
60#define F_MMU_TF_PROT_TO_PROGRAM_ADDR_MT8173 (2 << 5)
61
62#define REG_MMU_IVRP_PADDR 0x114
63
64#define REG_MMU_VLD_PA_RNG 0x118
65#define F_MMU_VLD_PA_RNG(EA, SA) (((EA) << 8) | (SA))
66
67#define REG_MMU_INT_CONTROL0 0x120
68#define F_L2_MULIT_HIT_EN BIT(0)
69#define F_TABLE_WALK_FAULT_INT_EN BIT(1)
70#define F_PREETCH_FIFO_OVERFLOW_INT_EN BIT(2)
71#define F_MISS_FIFO_OVERFLOW_INT_EN BIT(3)
72#define F_PREFETCH_FIFO_ERR_INT_EN BIT(5)
73#define F_MISS_FIFO_ERR_INT_EN BIT(6)
74#define F_INT_CLR_BIT BIT(12)
75
76#define REG_MMU_INT_MAIN_CONTROL 0x124
77
78#define F_INT_TRANSLATION_FAULT (BIT(0) | BIT(7))
79#define F_INT_MAIN_MULTI_HIT_FAULT (BIT(1) | BIT(8))
80#define F_INT_INVALID_PA_FAULT (BIT(2) | BIT(9))
81#define F_INT_ENTRY_REPLACEMENT_FAULT (BIT(3) | BIT(10))
82#define F_INT_TLB_MISS_FAULT (BIT(4) | BIT(11))
83#define F_INT_MISS_TRANSACTION_FIFO_FAULT (BIT(5) | BIT(12))
84#define F_INT_PRETETCH_TRANSATION_FIFO_FAULT (BIT(6) | BIT(13))
85
86#define REG_MMU_CPE_DONE 0x12C
87
88#define REG_MMU_FAULT_ST1 0x134
89#define F_REG_MMU0_FAULT_MASK GENMASK(6, 0)
90#define F_REG_MMU1_FAULT_MASK GENMASK(13, 7)
91
92#define REG_MMU0_FAULT_VA 0x13c
93#define F_MMU_INVAL_VA_31_12_MASK GENMASK(31, 12)
94#define F_MMU_INVAL_VA_34_32_MASK GENMASK(11, 9)
95#define F_MMU_INVAL_PA_34_32_MASK GENMASK(8, 6)
96#define F_MMU_FAULT_VA_WRITE_BIT BIT(1)
97#define F_MMU_FAULT_VA_LAYER_BIT BIT(0)
98
99#define REG_MMU0_INVLD_PA 0x140
100#define REG_MMU1_FAULT_VA 0x144
101#define REG_MMU1_INVLD_PA 0x148
102#define REG_MMU0_INT_ID 0x150
103#define REG_MMU1_INT_ID 0x154
104#define F_MMU_INT_ID_COMM_ID(a) (((a) >> 9) & 0x7)
105#define F_MMU_INT_ID_SUB_COMM_ID(a) (((a) >> 7) & 0x3)
106#define F_MMU_INT_ID_LARB_ID(a) (((a) >> 7) & 0x7)
107#define F_MMU_INT_ID_PORT_ID(a) (((a) >> 2) & 0x1f)
108
109#define MTK_PROTECT_PA_ALIGN 256
110
111#define HAS_4GB_MODE BIT(0)
112
113#define HAS_BCLK BIT(1)
114#define HAS_VLD_PA_RNG BIT(2)
115#define RESET_AXI BIT(3)
116#define OUT_ORDER_WR_EN BIT(4)
117#define HAS_SUB_COMM BIT(5)
118#define WR_THROT_EN BIT(6)
119#define HAS_LEGACY_IVRP_PADDR BIT(7)
120#define IOVA_34_EN BIT(8)
121
122#define MTK_IOMMU_HAS_FLAG(pdata, _x) \
123 ((((pdata)->flags) & (_x)) == (_x))
124
125struct mtk_iommu_domain {
126 struct io_pgtable_cfg cfg;
127 struct io_pgtable_ops *iop;
128
129 struct mtk_iommu_data *data;
130 struct iommu_domain domain;
131};
132
133static const struct iommu_ops mtk_iommu_ops;
134
135static int mtk_iommu_hw_init(const struct mtk_iommu_data *data);
136
137#define MTK_IOMMU_TLB_ADDR(iova) ({ \
138 dma_addr_t _addr = iova; \
139 ((lower_32_bits(_addr) & GENMASK(31, 12)) | upper_32_bits(_addr));\
140})
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163
164#define MTK_IOMMU_4GB_MODE_REMAP_BASE 0x140000000UL
165
166static LIST_HEAD(m4ulist);
167
168#define for_each_m4u(data) list_for_each_entry(data, &m4ulist, list)
169
170struct mtk_iommu_iova_region {
171 dma_addr_t iova_base;
172 unsigned long long size;
173};
174
175static const struct mtk_iommu_iova_region single_domain[] = {
176 {.iova_base = 0, .size = SZ_4G},
177};
178
179static const struct mtk_iommu_iova_region mt8192_multi_dom[] = {
180 { .iova_base = 0x0, .size = SZ_4G},
181 #if IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT)
182 { .iova_base = SZ_4G, .size = SZ_4G},
183 { .iova_base = SZ_4G * 2, .size = SZ_4G},
184 { .iova_base = 0x240000000ULL, .size = 0x4000000},
185 { .iova_base = 0x244000000ULL, .size = 0x4000000},
186 #endif
187};
188
189
190
191
192
193
194
195
196static struct mtk_iommu_data *mtk_iommu_get_m4u_data(void)
197{
198 struct mtk_iommu_data *data;
199
200 for_each_m4u(data)
201 return data;
202
203 return NULL;
204}
205
206static struct mtk_iommu_domain *to_mtk_domain(struct iommu_domain *dom)
207{
208 return container_of(dom, struct mtk_iommu_domain, domain);
209}
210
211static void mtk_iommu_tlb_flush_all(struct mtk_iommu_data *data)
212{
213 for_each_m4u(data) {
214 if (pm_runtime_get_if_in_use(data->dev) <= 0)
215 continue;
216
217 writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0,
218 data->base + data->plat_data->inv_sel_reg);
219 writel_relaxed(F_ALL_INVLD, data->base + REG_MMU_INVALIDATE);
220 wmb();
221
222 pm_runtime_put(data->dev);
223 }
224}
225
226static void mtk_iommu_tlb_flush_range_sync(unsigned long iova, size_t size,
227 size_t granule,
228 struct mtk_iommu_data *data)
229{
230 bool has_pm = !!data->dev->pm_domain;
231 unsigned long flags;
232 int ret;
233 u32 tmp;
234
235 for_each_m4u(data) {
236 if (has_pm) {
237 if (pm_runtime_get_if_in_use(data->dev) <= 0)
238 continue;
239 }
240
241 spin_lock_irqsave(&data->tlb_lock, flags);
242 writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0,
243 data->base + data->plat_data->inv_sel_reg);
244
245 writel_relaxed(MTK_IOMMU_TLB_ADDR(iova),
246 data->base + REG_MMU_INVLD_START_A);
247 writel_relaxed(MTK_IOMMU_TLB_ADDR(iova + size - 1),
248 data->base + REG_MMU_INVLD_END_A);
249 writel_relaxed(F_MMU_INV_RANGE,
250 data->base + REG_MMU_INVALIDATE);
251
252
253 ret = readl_poll_timeout_atomic(data->base + REG_MMU_CPE_DONE,
254 tmp, tmp != 0, 10, 1000);
255 if (ret) {
256 dev_warn(data->dev,
257 "Partial TLB flush timed out, falling back to full flush\n");
258 mtk_iommu_tlb_flush_all(data);
259 }
260
261 writel_relaxed(0, data->base + REG_MMU_CPE_DONE);
262 spin_unlock_irqrestore(&data->tlb_lock, flags);
263
264 if (has_pm)
265 pm_runtime_put(data->dev);
266 }
267}
268
269static irqreturn_t mtk_iommu_isr(int irq, void *dev_id)
270{
271 struct mtk_iommu_data *data = dev_id;
272 struct mtk_iommu_domain *dom = data->m4u_dom;
273 unsigned int fault_larb, fault_port, sub_comm = 0;
274 u32 int_state, regval, va34_32, pa34_32;
275 u64 fault_iova, fault_pa;
276 bool layer, write;
277
278
279 int_state = readl_relaxed(data->base + REG_MMU_FAULT_ST1);
280 if (int_state & F_REG_MMU0_FAULT_MASK) {
281 regval = readl_relaxed(data->base + REG_MMU0_INT_ID);
282 fault_iova = readl_relaxed(data->base + REG_MMU0_FAULT_VA);
283 fault_pa = readl_relaxed(data->base + REG_MMU0_INVLD_PA);
284 } else {
285 regval = readl_relaxed(data->base + REG_MMU1_INT_ID);
286 fault_iova = readl_relaxed(data->base + REG_MMU1_FAULT_VA);
287 fault_pa = readl_relaxed(data->base + REG_MMU1_INVLD_PA);
288 }
289 layer = fault_iova & F_MMU_FAULT_VA_LAYER_BIT;
290 write = fault_iova & F_MMU_FAULT_VA_WRITE_BIT;
291 if (MTK_IOMMU_HAS_FLAG(data->plat_data, IOVA_34_EN)) {
292 va34_32 = FIELD_GET(F_MMU_INVAL_VA_34_32_MASK, fault_iova);
293 pa34_32 = FIELD_GET(F_MMU_INVAL_PA_34_32_MASK, fault_iova);
294 fault_iova = fault_iova & F_MMU_INVAL_VA_31_12_MASK;
295 fault_iova |= (u64)va34_32 << 32;
296 fault_pa |= (u64)pa34_32 << 32;
297 }
298
299 fault_port = F_MMU_INT_ID_PORT_ID(regval);
300 if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_SUB_COMM)) {
301 fault_larb = F_MMU_INT_ID_COMM_ID(regval);
302 sub_comm = F_MMU_INT_ID_SUB_COMM_ID(regval);
303 } else {
304 fault_larb = F_MMU_INT_ID_LARB_ID(regval);
305 }
306 fault_larb = data->plat_data->larbid_remap[fault_larb][sub_comm];
307
308 if (report_iommu_fault(&dom->domain, data->dev, fault_iova,
309 write ? IOMMU_FAULT_WRITE : IOMMU_FAULT_READ)) {
310 dev_err_ratelimited(
311 data->dev,
312 "fault type=0x%x iova=0x%llx pa=0x%llx larb=%d port=%d layer=%d %s\n",
313 int_state, fault_iova, fault_pa, fault_larb, fault_port,
314 layer, write ? "write" : "read");
315 }
316
317
318 regval = readl_relaxed(data->base + REG_MMU_INT_CONTROL0);
319 regval |= F_INT_CLR_BIT;
320 writel_relaxed(regval, data->base + REG_MMU_INT_CONTROL0);
321
322 mtk_iommu_tlb_flush_all(data);
323
324 return IRQ_HANDLED;
325}
326
327static int mtk_iommu_get_domain_id(struct device *dev,
328 const struct mtk_iommu_plat_data *plat_data)
329{
330 const struct mtk_iommu_iova_region *rgn = plat_data->iova_region;
331 const struct bus_dma_region *dma_rgn = dev->dma_range_map;
332 int i, candidate = -1;
333 dma_addr_t dma_end;
334
335 if (!dma_rgn || plat_data->iova_region_nr == 1)
336 return 0;
337
338 dma_end = dma_rgn->dma_start + dma_rgn->size - 1;
339 for (i = 0; i < plat_data->iova_region_nr; i++, rgn++) {
340
341 if (dma_rgn->dma_start == rgn->iova_base &&
342 dma_end == rgn->iova_base + rgn->size - 1)
343 return i;
344
345 if (dma_rgn->dma_start >= rgn->iova_base &&
346 dma_end < rgn->iova_base + rgn->size)
347 candidate = i;
348 }
349
350 if (candidate >= 0)
351 return candidate;
352 dev_err(dev, "Can NOT find the iommu domain id(%pad 0x%llx).\n",
353 &dma_rgn->dma_start, dma_rgn->size);
354 return -EINVAL;
355}
356
357static void mtk_iommu_config(struct mtk_iommu_data *data, struct device *dev,
358 bool enable, unsigned int domid)
359{
360 struct mtk_smi_larb_iommu *larb_mmu;
361 unsigned int larbid, portid;
362 struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
363 const struct mtk_iommu_iova_region *region;
364 int i;
365
366 for (i = 0; i < fwspec->num_ids; ++i) {
367 larbid = MTK_M4U_TO_LARB(fwspec->ids[i]);
368 portid = MTK_M4U_TO_PORT(fwspec->ids[i]);
369
370 larb_mmu = &data->larb_imu[larbid];
371
372 region = data->plat_data->iova_region + domid;
373 larb_mmu->bank[portid] = upper_32_bits(region->iova_base);
374
375 dev_dbg(dev, "%s iommu for larb(%s) port %d dom %d bank %d.\n",
376 enable ? "enable" : "disable", dev_name(larb_mmu->dev),
377 portid, domid, larb_mmu->bank[portid]);
378
379 if (enable)
380 larb_mmu->mmu |= MTK_SMI_MMU_EN(portid);
381 else
382 larb_mmu->mmu &= ~MTK_SMI_MMU_EN(portid);
383 }
384}
385
386static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom,
387 struct mtk_iommu_data *data,
388 unsigned int domid)
389{
390 const struct mtk_iommu_iova_region *region;
391
392
393 if (data->m4u_dom) {
394 dom->iop = data->m4u_dom->iop;
395 dom->cfg = data->m4u_dom->cfg;
396 dom->domain.pgsize_bitmap = data->m4u_dom->cfg.pgsize_bitmap;
397 goto update_iova_region;
398 }
399
400 dom->cfg = (struct io_pgtable_cfg) {
401 .quirks = IO_PGTABLE_QUIRK_ARM_NS |
402 IO_PGTABLE_QUIRK_NO_PERMS |
403 IO_PGTABLE_QUIRK_ARM_MTK_EXT,
404 .pgsize_bitmap = mtk_iommu_ops.pgsize_bitmap,
405 .ias = MTK_IOMMU_HAS_FLAG(data->plat_data, IOVA_34_EN) ? 34 : 32,
406 .iommu_dev = data->dev,
407 };
408
409 if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_4GB_MODE))
410 dom->cfg.oas = data->enable_4GB ? 33 : 32;
411 else
412 dom->cfg.oas = 35;
413
414 dom->iop = alloc_io_pgtable_ops(ARM_V7S, &dom->cfg, data);
415 if (!dom->iop) {
416 dev_err(data->dev, "Failed to alloc io pgtable\n");
417 return -EINVAL;
418 }
419
420
421 dom->domain.pgsize_bitmap = dom->cfg.pgsize_bitmap;
422
423update_iova_region:
424
425 region = data->plat_data->iova_region + domid;
426 dom->domain.geometry.aperture_start = region->iova_base;
427 dom->domain.geometry.aperture_end = region->iova_base + region->size - 1;
428 dom->domain.geometry.force_aperture = true;
429 return 0;
430}
431
432static struct iommu_domain *mtk_iommu_domain_alloc(unsigned type)
433{
434 struct mtk_iommu_domain *dom;
435
436 if (type != IOMMU_DOMAIN_DMA)
437 return NULL;
438
439 dom = kzalloc(sizeof(*dom), GFP_KERNEL);
440 if (!dom)
441 return NULL;
442
443 return &dom->domain;
444}
445
446static void mtk_iommu_domain_free(struct iommu_domain *domain)
447{
448 kfree(to_mtk_domain(domain));
449}
450
451static int mtk_iommu_attach_device(struct iommu_domain *domain,
452 struct device *dev)
453{
454 struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
455 struct mtk_iommu_domain *dom = to_mtk_domain(domain);
456 struct device *m4udev = data->dev;
457 int ret, domid;
458
459 domid = mtk_iommu_get_domain_id(dev, data->plat_data);
460 if (domid < 0)
461 return domid;
462
463 if (!dom->data) {
464 if (mtk_iommu_domain_finalise(dom, data, domid))
465 return -ENODEV;
466 dom->data = data;
467 }
468
469 if (!data->m4u_dom) {
470 ret = pm_runtime_resume_and_get(m4udev);
471 if (ret < 0)
472 return ret;
473
474 ret = mtk_iommu_hw_init(data);
475 if (ret) {
476 pm_runtime_put(m4udev);
477 return ret;
478 }
479 data->m4u_dom = dom;
480 writel(dom->cfg.arm_v7s_cfg.ttbr & MMU_PT_ADDR_MASK,
481 data->base + REG_MMU_PT_BASE_ADDR);
482
483 pm_runtime_put(m4udev);
484 }
485
486 mtk_iommu_config(data, dev, true, domid);
487 return 0;
488}
489
490static void mtk_iommu_detach_device(struct iommu_domain *domain,
491 struct device *dev)
492{
493 struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
494
495 mtk_iommu_config(data, dev, false, 0);
496}
497
498static int mtk_iommu_map(struct iommu_domain *domain, unsigned long iova,
499 phys_addr_t paddr, size_t size, int prot, gfp_t gfp)
500{
501 struct mtk_iommu_domain *dom = to_mtk_domain(domain);
502
503
504 if (dom->data->enable_4GB)
505 paddr |= BIT_ULL(32);
506
507
508 return dom->iop->map(dom->iop, iova, paddr, size, prot, gfp);
509}
510
511static size_t mtk_iommu_unmap(struct iommu_domain *domain,
512 unsigned long iova, size_t size,
513 struct iommu_iotlb_gather *gather)
514{
515 struct mtk_iommu_domain *dom = to_mtk_domain(domain);
516
517 iommu_iotlb_gather_add_range(gather, iova, size);
518 return dom->iop->unmap(dom->iop, iova, size, gather);
519}
520
521static void mtk_iommu_flush_iotlb_all(struct iommu_domain *domain)
522{
523 struct mtk_iommu_domain *dom = to_mtk_domain(domain);
524
525 mtk_iommu_tlb_flush_all(dom->data);
526}
527
528static void mtk_iommu_iotlb_sync(struct iommu_domain *domain,
529 struct iommu_iotlb_gather *gather)
530{
531 struct mtk_iommu_domain *dom = to_mtk_domain(domain);
532 size_t length = gather->end - gather->start + 1;
533
534 mtk_iommu_tlb_flush_range_sync(gather->start, length, gather->pgsize,
535 dom->data);
536}
537
538static void mtk_iommu_sync_map(struct iommu_domain *domain, unsigned long iova,
539 size_t size)
540{
541 struct mtk_iommu_domain *dom = to_mtk_domain(domain);
542
543 mtk_iommu_tlb_flush_range_sync(iova, size, size, dom->data);
544}
545
546static phys_addr_t mtk_iommu_iova_to_phys(struct iommu_domain *domain,
547 dma_addr_t iova)
548{
549 struct mtk_iommu_domain *dom = to_mtk_domain(domain);
550 phys_addr_t pa;
551
552 pa = dom->iop->iova_to_phys(dom->iop, iova);
553 if (IS_ENABLED(CONFIG_PHYS_ADDR_T_64BIT) &&
554 dom->data->enable_4GB &&
555 pa >= MTK_IOMMU_4GB_MODE_REMAP_BASE)
556 pa &= ~BIT_ULL(32);
557
558 return pa;
559}
560
561static struct iommu_device *mtk_iommu_probe_device(struct device *dev)
562{
563 struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
564 struct mtk_iommu_data *data;
565
566 if (!fwspec || fwspec->ops != &mtk_iommu_ops)
567 return ERR_PTR(-ENODEV);
568
569 data = dev_iommu_priv_get(dev);
570
571 return &data->iommu;
572}
573
574static void mtk_iommu_release_device(struct device *dev)
575{
576 struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
577
578 if (!fwspec || fwspec->ops != &mtk_iommu_ops)
579 return;
580
581 iommu_fwspec_free(dev);
582}
583
584static struct iommu_group *mtk_iommu_device_group(struct device *dev)
585{
586 struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
587 struct iommu_group *group;
588 int domid;
589
590 if (!data)
591 return ERR_PTR(-ENODEV);
592
593 domid = mtk_iommu_get_domain_id(dev, data->plat_data);
594 if (domid < 0)
595 return ERR_PTR(domid);
596
597 group = data->m4u_group[domid];
598 if (!group) {
599 group = iommu_group_alloc();
600 if (!IS_ERR(group))
601 data->m4u_group[domid] = group;
602 } else {
603 iommu_group_ref_get(group);
604 }
605 return group;
606}
607
608static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args)
609{
610 struct platform_device *m4updev;
611
612 if (args->args_count != 1) {
613 dev_err(dev, "invalid #iommu-cells(%d) property for IOMMU\n",
614 args->args_count);
615 return -EINVAL;
616 }
617
618 if (!dev_iommu_priv_get(dev)) {
619
620 m4updev = of_find_device_by_node(args->np);
621 if (WARN_ON(!m4updev))
622 return -EINVAL;
623
624 dev_iommu_priv_set(dev, platform_get_drvdata(m4updev));
625 }
626
627 return iommu_fwspec_add_ids(dev, args->args, 1);
628}
629
630static void mtk_iommu_get_resv_regions(struct device *dev,
631 struct list_head *head)
632{
633 struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
634 unsigned int domid = mtk_iommu_get_domain_id(dev, data->plat_data), i;
635 const struct mtk_iommu_iova_region *resv, *curdom;
636 struct iommu_resv_region *region;
637 int prot = IOMMU_WRITE | IOMMU_READ;
638
639 if ((int)domid < 0)
640 return;
641 curdom = data->plat_data->iova_region + domid;
642 for (i = 0; i < data->plat_data->iova_region_nr; i++) {
643 resv = data->plat_data->iova_region + i;
644
645
646 if (resv->iova_base <= curdom->iova_base ||
647 resv->iova_base + resv->size >= curdom->iova_base + curdom->size)
648 continue;
649
650 region = iommu_alloc_resv_region(resv->iova_base, resv->size,
651 prot, IOMMU_RESV_RESERVED);
652 if (!region)
653 return;
654
655 list_add_tail(®ion->list, head);
656 }
657}
658
659static const struct iommu_ops mtk_iommu_ops = {
660 .domain_alloc = mtk_iommu_domain_alloc,
661 .domain_free = mtk_iommu_domain_free,
662 .attach_dev = mtk_iommu_attach_device,
663 .detach_dev = mtk_iommu_detach_device,
664 .map = mtk_iommu_map,
665 .unmap = mtk_iommu_unmap,
666 .flush_iotlb_all = mtk_iommu_flush_iotlb_all,
667 .iotlb_sync = mtk_iommu_iotlb_sync,
668 .iotlb_sync_map = mtk_iommu_sync_map,
669 .iova_to_phys = mtk_iommu_iova_to_phys,
670 .probe_device = mtk_iommu_probe_device,
671 .release_device = mtk_iommu_release_device,
672 .device_group = mtk_iommu_device_group,
673 .of_xlate = mtk_iommu_of_xlate,
674 .get_resv_regions = mtk_iommu_get_resv_regions,
675 .put_resv_regions = generic_iommu_put_resv_regions,
676 .pgsize_bitmap = SZ_4K | SZ_64K | SZ_1M | SZ_16M,
677 .owner = THIS_MODULE,
678};
679
680static int mtk_iommu_hw_init(const struct mtk_iommu_data *data)
681{
682 u32 regval;
683
684 if (data->plat_data->m4u_plat == M4U_MT8173) {
685 regval = F_MMU_PREFETCH_RT_REPLACE_MOD |
686 F_MMU_TF_PROT_TO_PROGRAM_ADDR_MT8173;
687 } else {
688 regval = readl_relaxed(data->base + REG_MMU_CTRL_REG);
689 regval |= F_MMU_TF_PROT_TO_PROGRAM_ADDR;
690 }
691 writel_relaxed(regval, data->base + REG_MMU_CTRL_REG);
692
693 regval = F_L2_MULIT_HIT_EN |
694 F_TABLE_WALK_FAULT_INT_EN |
695 F_PREETCH_FIFO_OVERFLOW_INT_EN |
696 F_MISS_FIFO_OVERFLOW_INT_EN |
697 F_PREFETCH_FIFO_ERR_INT_EN |
698 F_MISS_FIFO_ERR_INT_EN;
699 writel_relaxed(regval, data->base + REG_MMU_INT_CONTROL0);
700
701 regval = F_INT_TRANSLATION_FAULT |
702 F_INT_MAIN_MULTI_HIT_FAULT |
703 F_INT_INVALID_PA_FAULT |
704 F_INT_ENTRY_REPLACEMENT_FAULT |
705 F_INT_TLB_MISS_FAULT |
706 F_INT_MISS_TRANSACTION_FIFO_FAULT |
707 F_INT_PRETETCH_TRANSATION_FIFO_FAULT;
708 writel_relaxed(regval, data->base + REG_MMU_INT_MAIN_CONTROL);
709
710 if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_LEGACY_IVRP_PADDR))
711 regval = (data->protect_base >> 1) | (data->enable_4GB << 31);
712 else
713 regval = lower_32_bits(data->protect_base) |
714 upper_32_bits(data->protect_base);
715 writel_relaxed(regval, data->base + REG_MMU_IVRP_PADDR);
716
717 if (data->enable_4GB &&
718 MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_VLD_PA_RNG)) {
719
720
721
722
723 regval = F_MMU_VLD_PA_RNG(7, 4);
724 writel_relaxed(regval, data->base + REG_MMU_VLD_PA_RNG);
725 }
726 writel_relaxed(0, data->base + REG_MMU_DCM_DIS);
727 if (MTK_IOMMU_HAS_FLAG(data->plat_data, WR_THROT_EN)) {
728
729 regval = readl_relaxed(data->base + REG_MMU_WR_LEN_CTRL);
730 regval &= ~F_MMU_WR_THROT_DIS_MASK;
731 writel_relaxed(regval, data->base + REG_MMU_WR_LEN_CTRL);
732 }
733
734 if (MTK_IOMMU_HAS_FLAG(data->plat_data, RESET_AXI)) {
735
736 regval = 0;
737 } else {
738 regval = readl_relaxed(data->base + REG_MMU_MISC_CTRL);
739 regval &= ~F_MMU_STANDARD_AXI_MODE_MASK;
740 if (MTK_IOMMU_HAS_FLAG(data->plat_data, OUT_ORDER_WR_EN))
741 regval &= ~F_MMU_IN_ORDER_WR_EN_MASK;
742 }
743 writel_relaxed(regval, data->base + REG_MMU_MISC_CTRL);
744
745 if (devm_request_irq(data->dev, data->irq, mtk_iommu_isr, 0,
746 dev_name(data->dev), (void *)data)) {
747 writel_relaxed(0, data->base + REG_MMU_PT_BASE_ADDR);
748 dev_err(data->dev, "Failed @ IRQ-%d Request\n", data->irq);
749 return -ENODEV;
750 }
751
752 return 0;
753}
754
755static const struct component_master_ops mtk_iommu_com_ops = {
756 .bind = mtk_iommu_bind,
757 .unbind = mtk_iommu_unbind,
758};
759
760static int mtk_iommu_probe(struct platform_device *pdev)
761{
762 struct mtk_iommu_data *data;
763 struct device *dev = &pdev->dev;
764 struct device_node *larbnode, *smicomm_node;
765 struct platform_device *plarbdev;
766 struct device_link *link;
767 struct resource *res;
768 resource_size_t ioaddr;
769 struct component_match *match = NULL;
770 struct regmap *infracfg;
771 void *protect;
772 int i, larb_nr, ret;
773 u32 val;
774 char *p;
775
776 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
777 if (!data)
778 return -ENOMEM;
779 data->dev = dev;
780 data->plat_data = of_device_get_match_data(dev);
781
782
783 protect = devm_kzalloc(dev, MTK_PROTECT_PA_ALIGN * 2, GFP_KERNEL);
784 if (!protect)
785 return -ENOMEM;
786 data->protect_base = ALIGN(virt_to_phys(protect), MTK_PROTECT_PA_ALIGN);
787
788 if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_4GB_MODE)) {
789 switch (data->plat_data->m4u_plat) {
790 case M4U_MT2712:
791 p = "mediatek,mt2712-infracfg";
792 break;
793 case M4U_MT8173:
794 p = "mediatek,mt8173-infracfg";
795 break;
796 default:
797 p = NULL;
798 }
799
800 infracfg = syscon_regmap_lookup_by_compatible(p);
801
802 if (IS_ERR(infracfg))
803 return PTR_ERR(infracfg);
804
805 ret = regmap_read(infracfg, REG_INFRA_MISC, &val);
806 if (ret)
807 return ret;
808 data->enable_4GB = !!(val & F_DDR_4GB_SUPPORT_EN);
809 }
810
811 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
812 data->base = devm_ioremap_resource(dev, res);
813 if (IS_ERR(data->base))
814 return PTR_ERR(data->base);
815 ioaddr = res->start;
816
817 data->irq = platform_get_irq(pdev, 0);
818 if (data->irq < 0)
819 return data->irq;
820
821 if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_BCLK)) {
822 data->bclk = devm_clk_get(dev, "bclk");
823 if (IS_ERR(data->bclk))
824 return PTR_ERR(data->bclk);
825 }
826
827 larb_nr = of_count_phandle_with_args(dev->of_node,
828 "mediatek,larbs", NULL);
829 if (larb_nr < 0)
830 return larb_nr;
831
832 for (i = 0; i < larb_nr; i++) {
833 u32 id;
834
835 larbnode = of_parse_phandle(dev->of_node, "mediatek,larbs", i);
836 if (!larbnode)
837 return -EINVAL;
838
839 if (!of_device_is_available(larbnode)) {
840 of_node_put(larbnode);
841 continue;
842 }
843
844 ret = of_property_read_u32(larbnode, "mediatek,larb-id", &id);
845 if (ret)
846 id = i;
847
848 plarbdev = of_find_device_by_node(larbnode);
849 if (!plarbdev) {
850 of_node_put(larbnode);
851 return -EPROBE_DEFER;
852 }
853 data->larb_imu[id].dev = &plarbdev->dev;
854
855 component_match_add_release(dev, &match, release_of,
856 compare_of, larbnode);
857 }
858
859
860 smicomm_node = of_parse_phandle(larbnode, "mediatek,smi", 0);
861 if (!smicomm_node)
862 return -EINVAL;
863
864 plarbdev = of_find_device_by_node(smicomm_node);
865 of_node_put(smicomm_node);
866 data->smicomm_dev = &plarbdev->dev;
867
868 pm_runtime_enable(dev);
869
870 link = device_link_add(data->smicomm_dev, dev,
871 DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME);
872 if (!link) {
873 dev_err(dev, "Unable to link %s.\n", dev_name(data->smicomm_dev));
874 ret = -EINVAL;
875 goto out_runtime_disable;
876 }
877
878 platform_set_drvdata(pdev, data);
879
880 ret = iommu_device_sysfs_add(&data->iommu, dev, NULL,
881 "mtk-iommu.%pa", &ioaddr);
882 if (ret)
883 goto out_link_remove;
884
885 ret = iommu_device_register(&data->iommu, &mtk_iommu_ops, dev);
886 if (ret)
887 goto out_sysfs_remove;
888
889 spin_lock_init(&data->tlb_lock);
890 list_add_tail(&data->list, &m4ulist);
891
892 if (!iommu_present(&platform_bus_type)) {
893 ret = bus_set_iommu(&platform_bus_type, &mtk_iommu_ops);
894 if (ret)
895 goto out_list_del;
896 }
897
898 ret = component_master_add_with_match(dev, &mtk_iommu_com_ops, match);
899 if (ret)
900 goto out_bus_set_null;
901 return ret;
902
903out_bus_set_null:
904 bus_set_iommu(&platform_bus_type, NULL);
905out_list_del:
906 list_del(&data->list);
907 iommu_device_unregister(&data->iommu);
908out_sysfs_remove:
909 iommu_device_sysfs_remove(&data->iommu);
910out_link_remove:
911 device_link_remove(data->smicomm_dev, dev);
912out_runtime_disable:
913 pm_runtime_disable(dev);
914 return ret;
915}
916
917static int mtk_iommu_remove(struct platform_device *pdev)
918{
919 struct mtk_iommu_data *data = platform_get_drvdata(pdev);
920
921 iommu_device_sysfs_remove(&data->iommu);
922 iommu_device_unregister(&data->iommu);
923
924 if (iommu_present(&platform_bus_type))
925 bus_set_iommu(&platform_bus_type, NULL);
926
927 clk_disable_unprepare(data->bclk);
928 device_link_remove(data->smicomm_dev, &pdev->dev);
929 pm_runtime_disable(&pdev->dev);
930 devm_free_irq(&pdev->dev, data->irq, data);
931 component_master_del(&pdev->dev, &mtk_iommu_com_ops);
932 return 0;
933}
934
935static int __maybe_unused mtk_iommu_runtime_suspend(struct device *dev)
936{
937 struct mtk_iommu_data *data = dev_get_drvdata(dev);
938 struct mtk_iommu_suspend_reg *reg = &data->reg;
939 void __iomem *base = data->base;
940
941 reg->wr_len_ctrl = readl_relaxed(base + REG_MMU_WR_LEN_CTRL);
942 reg->misc_ctrl = readl_relaxed(base + REG_MMU_MISC_CTRL);
943 reg->dcm_dis = readl_relaxed(base + REG_MMU_DCM_DIS);
944 reg->ctrl_reg = readl_relaxed(base + REG_MMU_CTRL_REG);
945 reg->int_control0 = readl_relaxed(base + REG_MMU_INT_CONTROL0);
946 reg->int_main_control = readl_relaxed(base + REG_MMU_INT_MAIN_CONTROL);
947 reg->ivrp_paddr = readl_relaxed(base + REG_MMU_IVRP_PADDR);
948 reg->vld_pa_rng = readl_relaxed(base + REG_MMU_VLD_PA_RNG);
949 clk_disable_unprepare(data->bclk);
950 return 0;
951}
952
953static int __maybe_unused mtk_iommu_runtime_resume(struct device *dev)
954{
955 struct mtk_iommu_data *data = dev_get_drvdata(dev);
956 struct mtk_iommu_suspend_reg *reg = &data->reg;
957 struct mtk_iommu_domain *m4u_dom = data->m4u_dom;
958 void __iomem *base = data->base;
959 int ret;
960
961 ret = clk_prepare_enable(data->bclk);
962 if (ret) {
963 dev_err(data->dev, "Failed to enable clk(%d) in resume\n", ret);
964 return ret;
965 }
966
967
968
969
970
971 if (!m4u_dom)
972 return 0;
973
974 writel_relaxed(reg->wr_len_ctrl, base + REG_MMU_WR_LEN_CTRL);
975 writel_relaxed(reg->misc_ctrl, base + REG_MMU_MISC_CTRL);
976 writel_relaxed(reg->dcm_dis, base + REG_MMU_DCM_DIS);
977 writel_relaxed(reg->ctrl_reg, base + REG_MMU_CTRL_REG);
978 writel_relaxed(reg->int_control0, base + REG_MMU_INT_CONTROL0);
979 writel_relaxed(reg->int_main_control, base + REG_MMU_INT_MAIN_CONTROL);
980 writel_relaxed(reg->ivrp_paddr, base + REG_MMU_IVRP_PADDR);
981 writel_relaxed(reg->vld_pa_rng, base + REG_MMU_VLD_PA_RNG);
982 writel(m4u_dom->cfg.arm_v7s_cfg.ttbr & MMU_PT_ADDR_MASK, base + REG_MMU_PT_BASE_ADDR);
983 return 0;
984}
985
986static const struct dev_pm_ops mtk_iommu_pm_ops = {
987 SET_RUNTIME_PM_OPS(mtk_iommu_runtime_suspend, mtk_iommu_runtime_resume, NULL)
988 SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
989 pm_runtime_force_resume)
990};
991
992static const struct mtk_iommu_plat_data mt2712_data = {
993 .m4u_plat = M4U_MT2712,
994 .flags = HAS_4GB_MODE | HAS_BCLK | HAS_VLD_PA_RNG,
995 .inv_sel_reg = REG_MMU_INV_SEL_GEN1,
996 .iova_region = single_domain,
997 .iova_region_nr = ARRAY_SIZE(single_domain),
998 .larbid_remap = {{0}, {1}, {2}, {3}, {4}, {5}, {6}, {7}},
999};
1000
1001static const struct mtk_iommu_plat_data mt6779_data = {
1002 .m4u_plat = M4U_MT6779,
1003 .flags = HAS_SUB_COMM | OUT_ORDER_WR_EN | WR_THROT_EN,
1004 .inv_sel_reg = REG_MMU_INV_SEL_GEN2,
1005 .iova_region = single_domain,
1006 .iova_region_nr = ARRAY_SIZE(single_domain),
1007 .larbid_remap = {{0}, {1}, {2}, {3}, {5}, {7, 8}, {10}, {9}},
1008};
1009
1010static const struct mtk_iommu_plat_data mt8167_data = {
1011 .m4u_plat = M4U_MT8167,
1012 .flags = RESET_AXI | HAS_LEGACY_IVRP_PADDR,
1013 .inv_sel_reg = REG_MMU_INV_SEL_GEN1,
1014 .iova_region = single_domain,
1015 .iova_region_nr = ARRAY_SIZE(single_domain),
1016 .larbid_remap = {{0}, {1}, {2}},
1017};
1018
1019static const struct mtk_iommu_plat_data mt8173_data = {
1020 .m4u_plat = M4U_MT8173,
1021 .flags = HAS_4GB_MODE | HAS_BCLK | RESET_AXI |
1022 HAS_LEGACY_IVRP_PADDR,
1023 .inv_sel_reg = REG_MMU_INV_SEL_GEN1,
1024 .iova_region = single_domain,
1025 .iova_region_nr = ARRAY_SIZE(single_domain),
1026 .larbid_remap = {{0}, {1}, {2}, {3}, {4}, {5}},
1027};
1028
1029static const struct mtk_iommu_plat_data mt8183_data = {
1030 .m4u_plat = M4U_MT8183,
1031 .flags = RESET_AXI,
1032 .inv_sel_reg = REG_MMU_INV_SEL_GEN1,
1033 .iova_region = single_domain,
1034 .iova_region_nr = ARRAY_SIZE(single_domain),
1035 .larbid_remap = {{0}, {4}, {5}, {6}, {7}, {2}, {3}, {1}},
1036};
1037
1038static const struct mtk_iommu_plat_data mt8192_data = {
1039 .m4u_plat = M4U_MT8192,
1040 .flags = HAS_BCLK | HAS_SUB_COMM | OUT_ORDER_WR_EN |
1041 WR_THROT_EN | IOVA_34_EN,
1042 .inv_sel_reg = REG_MMU_INV_SEL_GEN2,
1043 .iova_region = mt8192_multi_dom,
1044 .iova_region_nr = ARRAY_SIZE(mt8192_multi_dom),
1045 .larbid_remap = {{0}, {1}, {4, 5}, {7}, {2}, {9, 11, 19, 20},
1046 {0, 14, 16}, {0, 13, 18, 17}},
1047};
1048
1049static const struct of_device_id mtk_iommu_of_ids[] = {
1050 { .compatible = "mediatek,mt2712-m4u", .data = &mt2712_data},
1051 { .compatible = "mediatek,mt6779-m4u", .data = &mt6779_data},
1052 { .compatible = "mediatek,mt8167-m4u", .data = &mt8167_data},
1053 { .compatible = "mediatek,mt8173-m4u", .data = &mt8173_data},
1054 { .compatible = "mediatek,mt8183-m4u", .data = &mt8183_data},
1055 { .compatible = "mediatek,mt8192-m4u", .data = &mt8192_data},
1056 {}
1057};
1058
1059static struct platform_driver mtk_iommu_driver = {
1060 .probe = mtk_iommu_probe,
1061 .remove = mtk_iommu_remove,
1062 .driver = {
1063 .name = "mtk-iommu",
1064 .of_match_table = mtk_iommu_of_ids,
1065 .pm = &mtk_iommu_pm_ops,
1066 }
1067};
1068module_platform_driver(mtk_iommu_driver);
1069
1070MODULE_DESCRIPTION("IOMMU API for MediaTek M4U implementations");
1071MODULE_LICENSE("GPL v2");
1072
