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1802d0be | 1 | // SPDX-License-Identifier: GPL-2.0-only |
0df4fabe YW |
2 | /* |
3 | * Copyright (c) 2015-2016 MediaTek Inc. | |
4 | * Author: Yong Wu <yong.wu@mediatek.com> | |
0df4fabe | 5 | */ |
57c8a661 | 6 | #include <linux/memblock.h> |
0df4fabe YW |
7 | #include <linux/bug.h> |
8 | #include <linux/clk.h> | |
9 | #include <linux/component.h> | |
10 | #include <linux/device.h> | |
11 | #include <linux/dma-iommu.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/of_address.h> | |
19 | #include <linux/of_iommu.h> | |
20 | #include <linux/of_irq.h> | |
21 | #include <linux/of_platform.h> | |
22 | #include <linux/platform_device.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/spinlock.h> | |
25 | #include <asm/barrier.h> | |
0df4fabe YW |
26 | #include <soc/mediatek/smi.h> |
27 | ||
9ca340c9 | 28 | #include "mtk_iommu.h" |
0df4fabe YW |
29 | |
30 | #define REG_MMU_PT_BASE_ADDR 0x000 | |
907ba6a1 | 31 | #define MMU_PT_ADDR_MASK GENMASK(31, 7) |
0df4fabe YW |
32 | |
33 | #define REG_MMU_INVALIDATE 0x020 | |
34 | #define F_ALL_INVLD 0x2 | |
35 | #define F_MMU_INV_RANGE 0x1 | |
36 | ||
37 | #define REG_MMU_INVLD_START_A 0x024 | |
38 | #define REG_MMU_INVLD_END_A 0x028 | |
39 | ||
40 | #define REG_MMU_INV_SEL 0x038 | |
41 | #define F_INVLD_EN0 BIT(0) | |
42 | #define F_INVLD_EN1 BIT(1) | |
43 | ||
44 | #define REG_MMU_STANDARD_AXI_MODE 0x048 | |
45 | #define REG_MMU_DCM_DIS 0x050 | |
46 | ||
47 | #define REG_MMU_CTRL_REG 0x110 | |
acb3c92a | 48 | #define F_MMU_TF_PROT_TO_PROGRAM_ADDR (2 << 4) |
0df4fabe | 49 | #define F_MMU_PREFETCH_RT_REPLACE_MOD BIT(4) |
acb3c92a | 50 | #define F_MMU_TF_PROT_TO_PROGRAM_ADDR_MT8173 (2 << 5) |
0df4fabe YW |
51 | |
52 | #define REG_MMU_IVRP_PADDR 0x114 | |
70ca608b | 53 | |
30e2fccf YW |
54 | #define REG_MMU_VLD_PA_RNG 0x118 |
55 | #define F_MMU_VLD_PA_RNG(EA, SA) (((EA) << 8) | (SA)) | |
0df4fabe YW |
56 | |
57 | #define REG_MMU_INT_CONTROL0 0x120 | |
58 | #define F_L2_MULIT_HIT_EN BIT(0) | |
59 | #define F_TABLE_WALK_FAULT_INT_EN BIT(1) | |
60 | #define F_PREETCH_FIFO_OVERFLOW_INT_EN BIT(2) | |
61 | #define F_MISS_FIFO_OVERFLOW_INT_EN BIT(3) | |
62 | #define F_PREFETCH_FIFO_ERR_INT_EN BIT(5) | |
63 | #define F_MISS_FIFO_ERR_INT_EN BIT(6) | |
64 | #define F_INT_CLR_BIT BIT(12) | |
65 | ||
66 | #define REG_MMU_INT_MAIN_CONTROL 0x124 | |
15a01f4c YW |
67 | /* mmu0 | mmu1 */ |
68 | #define F_INT_TRANSLATION_FAULT (BIT(0) | BIT(7)) | |
69 | #define F_INT_MAIN_MULTI_HIT_FAULT (BIT(1) | BIT(8)) | |
70 | #define F_INT_INVALID_PA_FAULT (BIT(2) | BIT(9)) | |
71 | #define F_INT_ENTRY_REPLACEMENT_FAULT (BIT(3) | BIT(10)) | |
72 | #define F_INT_TLB_MISS_FAULT (BIT(4) | BIT(11)) | |
73 | #define F_INT_MISS_TRANSACTION_FIFO_FAULT (BIT(5) | BIT(12)) | |
74 | #define F_INT_PRETETCH_TRANSATION_FIFO_FAULT (BIT(6) | BIT(13)) | |
0df4fabe YW |
75 | |
76 | #define REG_MMU_CPE_DONE 0x12C | |
77 | ||
78 | #define REG_MMU_FAULT_ST1 0x134 | |
15a01f4c YW |
79 | #define F_REG_MMU0_FAULT_MASK GENMASK(6, 0) |
80 | #define F_REG_MMU1_FAULT_MASK GENMASK(13, 7) | |
0df4fabe | 81 | |
15a01f4c | 82 | #define REG_MMU0_FAULT_VA 0x13c |
0df4fabe YW |
83 | #define F_MMU_FAULT_VA_WRITE_BIT BIT(1) |
84 | #define F_MMU_FAULT_VA_LAYER_BIT BIT(0) | |
85 | ||
15a01f4c YW |
86 | #define REG_MMU0_INVLD_PA 0x140 |
87 | #define REG_MMU1_FAULT_VA 0x144 | |
88 | #define REG_MMU1_INVLD_PA 0x148 | |
89 | #define REG_MMU0_INT_ID 0x150 | |
90 | #define REG_MMU1_INT_ID 0x154 | |
91 | #define F_MMU_INT_ID_LARB_ID(a) (((a) >> 7) & 0x7) | |
92 | #define F_MMU_INT_ID_PORT_ID(a) (((a) >> 2) & 0x1f) | |
0df4fabe YW |
93 | |
94 | #define MTK_PROTECT_PA_ALIGN 128 | |
95 | ||
a9467d95 YW |
96 | /* |
97 | * Get the local arbiter ID and the portid within the larb arbiter | |
98 | * from mtk_m4u_id which is defined by MTK_M4U_ID. | |
99 | */ | |
e6dec923 | 100 | #define MTK_M4U_TO_LARB(id) (((id) >> 5) & 0xf) |
a9467d95 YW |
101 | #define MTK_M4U_TO_PORT(id) ((id) & 0x1f) |
102 | ||
0df4fabe | 103 | struct mtk_iommu_domain { |
0df4fabe YW |
104 | struct io_pgtable_cfg cfg; |
105 | struct io_pgtable_ops *iop; | |
106 | ||
107 | struct iommu_domain domain; | |
108 | }; | |
109 | ||
b65f5016 | 110 | static const struct iommu_ops mtk_iommu_ops; |
0df4fabe | 111 | |
76ce6546 YW |
112 | /* |
113 | * In M4U 4GB mode, the physical address is remapped as below: | |
114 | * | |
115 | * CPU Physical address: | |
116 | * ==================== | |
117 | * | |
118 | * 0 1G 2G 3G 4G 5G | |
119 | * |---A---|---B---|---C---|---D---|---E---| | |
120 | * +--I/O--+------------Memory-------------+ | |
121 | * | |
122 | * IOMMU output physical address: | |
123 | * ============================= | |
124 | * | |
125 | * 4G 5G 6G 7G 8G | |
126 | * |---E---|---B---|---C---|---D---| | |
127 | * +------------Memory-------------+ | |
128 | * | |
129 | * The Region 'A'(I/O) can NOT be mapped by M4U; For Region 'B'/'C'/'D', the | |
130 | * bit32 of the CPU physical address always is needed to set, and for Region | |
131 | * 'E', the CPU physical address keep as is. | |
132 | * Additionally, The iommu consumers always use the CPU phyiscal address. | |
133 | */ | |
b4dad40e | 134 | #define MTK_IOMMU_4GB_MODE_REMAP_BASE 0x140000000UL |
76ce6546 | 135 | |
7c3a2ec0 YW |
136 | static LIST_HEAD(m4ulist); /* List all the M4U HWs */ |
137 | ||
138 | #define for_each_m4u(data) list_for_each_entry(data, &m4ulist, list) | |
139 | ||
140 | /* | |
141 | * There may be 1 or 2 M4U HWs, But we always expect they are in the same domain | |
142 | * for the performance. | |
143 | * | |
144 | * Here always return the mtk_iommu_data of the first probed M4U where the | |
145 | * iommu domain information is recorded. | |
146 | */ | |
147 | static struct mtk_iommu_data *mtk_iommu_get_m4u_data(void) | |
148 | { | |
149 | struct mtk_iommu_data *data; | |
150 | ||
151 | for_each_m4u(data) | |
152 | return data; | |
153 | ||
154 | return NULL; | |
155 | } | |
156 | ||
0df4fabe YW |
157 | static struct mtk_iommu_domain *to_mtk_domain(struct iommu_domain *dom) |
158 | { | |
159 | return container_of(dom, struct mtk_iommu_domain, domain); | |
160 | } | |
161 | ||
162 | static void mtk_iommu_tlb_flush_all(void *cookie) | |
163 | { | |
164 | struct mtk_iommu_data *data = cookie; | |
165 | ||
7c3a2ec0 YW |
166 | for_each_m4u(data) { |
167 | writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0, | |
168 | data->base + REG_MMU_INV_SEL); | |
169 | writel_relaxed(F_ALL_INVLD, data->base + REG_MMU_INVALIDATE); | |
170 | wmb(); /* Make sure the tlb flush all done */ | |
171 | } | |
0df4fabe YW |
172 | } |
173 | ||
1f4fd624 | 174 | static void mtk_iommu_tlb_flush_range_sync(unsigned long iova, size_t size, |
67caf7e2 | 175 | size_t granule, void *cookie) |
0df4fabe YW |
176 | { |
177 | struct mtk_iommu_data *data = cookie; | |
1f4fd624 YW |
178 | unsigned long flags; |
179 | int ret; | |
180 | u32 tmp; | |
0df4fabe | 181 | |
7c3a2ec0 | 182 | for_each_m4u(data) { |
1f4fd624 | 183 | spin_lock_irqsave(&data->tlb_lock, flags); |
7c3a2ec0 YW |
184 | writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0, |
185 | data->base + REG_MMU_INV_SEL); | |
0df4fabe | 186 | |
7c3a2ec0 YW |
187 | writel_relaxed(iova, data->base + REG_MMU_INVLD_START_A); |
188 | writel_relaxed(iova + size - 1, | |
189 | data->base + REG_MMU_INVLD_END_A); | |
190 | writel_relaxed(F_MMU_INV_RANGE, | |
191 | data->base + REG_MMU_INVALIDATE); | |
98a8f63e | 192 | |
1f4fd624 | 193 | /* tlb sync */ |
7c3a2ec0 YW |
194 | ret = readl_poll_timeout_atomic(data->base + REG_MMU_CPE_DONE, |
195 | tmp, tmp != 0, 10, 100000); | |
196 | if (ret) { | |
197 | dev_warn(data->dev, | |
198 | "Partial TLB flush timed out, falling back to full flush\n"); | |
199 | mtk_iommu_tlb_flush_all(cookie); | |
200 | } | |
201 | /* Clear the CPE status */ | |
202 | writel_relaxed(0, data->base + REG_MMU_CPE_DONE); | |
1f4fd624 | 203 | spin_unlock_irqrestore(&data->tlb_lock, flags); |
0df4fabe | 204 | } |
0df4fabe YW |
205 | } |
206 | ||
3951c41a WD |
207 | static void mtk_iommu_tlb_flush_page_nosync(struct iommu_iotlb_gather *gather, |
208 | unsigned long iova, size_t granule, | |
abfd6fe0 WD |
209 | void *cookie) |
210 | { | |
da3cc91b | 211 | struct mtk_iommu_data *data = cookie; |
a7a04ea3 | 212 | struct iommu_domain *domain = &data->m4u_dom->domain; |
da3cc91b | 213 | |
a7a04ea3 | 214 | iommu_iotlb_gather_add_page(domain, gather, iova, granule); |
abfd6fe0 WD |
215 | } |
216 | ||
298f7889 | 217 | static const struct iommu_flush_ops mtk_iommu_flush_ops = { |
0df4fabe | 218 | .tlb_flush_all = mtk_iommu_tlb_flush_all, |
1f4fd624 YW |
219 | .tlb_flush_walk = mtk_iommu_tlb_flush_range_sync, |
220 | .tlb_flush_leaf = mtk_iommu_tlb_flush_range_sync, | |
abfd6fe0 | 221 | .tlb_add_page = mtk_iommu_tlb_flush_page_nosync, |
0df4fabe YW |
222 | }; |
223 | ||
224 | static irqreturn_t mtk_iommu_isr(int irq, void *dev_id) | |
225 | { | |
226 | struct mtk_iommu_data *data = dev_id; | |
227 | struct mtk_iommu_domain *dom = data->m4u_dom; | |
228 | u32 int_state, regval, fault_iova, fault_pa; | |
229 | unsigned int fault_larb, fault_port; | |
230 | bool layer, write; | |
231 | ||
232 | /* Read error info from registers */ | |
233 | int_state = readl_relaxed(data->base + REG_MMU_FAULT_ST1); | |
15a01f4c YW |
234 | if (int_state & F_REG_MMU0_FAULT_MASK) { |
235 | regval = readl_relaxed(data->base + REG_MMU0_INT_ID); | |
236 | fault_iova = readl_relaxed(data->base + REG_MMU0_FAULT_VA); | |
237 | fault_pa = readl_relaxed(data->base + REG_MMU0_INVLD_PA); | |
238 | } else { | |
239 | regval = readl_relaxed(data->base + REG_MMU1_INT_ID); | |
240 | fault_iova = readl_relaxed(data->base + REG_MMU1_FAULT_VA); | |
241 | fault_pa = readl_relaxed(data->base + REG_MMU1_INVLD_PA); | |
242 | } | |
0df4fabe YW |
243 | layer = fault_iova & F_MMU_FAULT_VA_LAYER_BIT; |
244 | write = fault_iova & F_MMU_FAULT_VA_WRITE_BIT; | |
15a01f4c YW |
245 | fault_larb = F_MMU_INT_ID_LARB_ID(regval); |
246 | fault_port = F_MMU_INT_ID_PORT_ID(regval); | |
0df4fabe | 247 | |
b3e5eee7 YW |
248 | fault_larb = data->plat_data->larbid_remap[fault_larb]; |
249 | ||
0df4fabe YW |
250 | if (report_iommu_fault(&dom->domain, data->dev, fault_iova, |
251 | write ? IOMMU_FAULT_WRITE : IOMMU_FAULT_READ)) { | |
252 | dev_err_ratelimited( | |
253 | data->dev, | |
254 | "fault type=0x%x iova=0x%x pa=0x%x larb=%d port=%d layer=%d %s\n", | |
255 | int_state, fault_iova, fault_pa, fault_larb, fault_port, | |
256 | layer, write ? "write" : "read"); | |
257 | } | |
258 | ||
259 | /* Interrupt clear */ | |
260 | regval = readl_relaxed(data->base + REG_MMU_INT_CONTROL0); | |
261 | regval |= F_INT_CLR_BIT; | |
262 | writel_relaxed(regval, data->base + REG_MMU_INT_CONTROL0); | |
263 | ||
264 | mtk_iommu_tlb_flush_all(data); | |
265 | ||
266 | return IRQ_HANDLED; | |
267 | } | |
268 | ||
269 | static void mtk_iommu_config(struct mtk_iommu_data *data, | |
270 | struct device *dev, bool enable) | |
271 | { | |
0df4fabe YW |
272 | struct mtk_smi_larb_iommu *larb_mmu; |
273 | unsigned int larbid, portid; | |
a9bf2eec | 274 | struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); |
58f0d1d5 | 275 | int i; |
0df4fabe | 276 | |
58f0d1d5 RM |
277 | for (i = 0; i < fwspec->num_ids; ++i) { |
278 | larbid = MTK_M4U_TO_LARB(fwspec->ids[i]); | |
279 | portid = MTK_M4U_TO_PORT(fwspec->ids[i]); | |
1ee9feb2 | 280 | larb_mmu = &data->larb_imu[larbid]; |
0df4fabe YW |
281 | |
282 | dev_dbg(dev, "%s iommu port: %d\n", | |
283 | enable ? "enable" : "disable", portid); | |
284 | ||
285 | if (enable) | |
286 | larb_mmu->mmu |= MTK_SMI_MMU_EN(portid); | |
287 | else | |
288 | larb_mmu->mmu &= ~MTK_SMI_MMU_EN(portid); | |
289 | } | |
290 | } | |
291 | ||
4b00f5ac | 292 | static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom) |
0df4fabe | 293 | { |
4b00f5ac | 294 | struct mtk_iommu_data *data = mtk_iommu_get_m4u_data(); |
0df4fabe | 295 | |
0df4fabe YW |
296 | dom->cfg = (struct io_pgtable_cfg) { |
297 | .quirks = IO_PGTABLE_QUIRK_ARM_NS | | |
298 | IO_PGTABLE_QUIRK_NO_PERMS | | |
b4dad40e YW |
299 | IO_PGTABLE_QUIRK_TLBI_ON_MAP | |
300 | IO_PGTABLE_QUIRK_ARM_MTK_EXT, | |
0df4fabe YW |
301 | .pgsize_bitmap = mtk_iommu_ops.pgsize_bitmap, |
302 | .ias = 32, | |
b4dad40e | 303 | .oas = 34, |
298f7889 | 304 | .tlb = &mtk_iommu_flush_ops, |
0df4fabe YW |
305 | .iommu_dev = data->dev, |
306 | }; | |
307 | ||
308 | dom->iop = alloc_io_pgtable_ops(ARM_V7S, &dom->cfg, data); | |
309 | if (!dom->iop) { | |
310 | dev_err(data->dev, "Failed to alloc io pgtable\n"); | |
311 | return -EINVAL; | |
312 | } | |
313 | ||
314 | /* Update our support page sizes bitmap */ | |
d16e0faa | 315 | dom->domain.pgsize_bitmap = dom->cfg.pgsize_bitmap; |
0df4fabe YW |
316 | return 0; |
317 | } | |
318 | ||
319 | static struct iommu_domain *mtk_iommu_domain_alloc(unsigned type) | |
320 | { | |
321 | struct mtk_iommu_domain *dom; | |
322 | ||
323 | if (type != IOMMU_DOMAIN_DMA) | |
324 | return NULL; | |
325 | ||
326 | dom = kzalloc(sizeof(*dom), GFP_KERNEL); | |
327 | if (!dom) | |
328 | return NULL; | |
329 | ||
4b00f5ac YW |
330 | if (iommu_get_dma_cookie(&dom->domain)) |
331 | goto free_dom; | |
332 | ||
333 | if (mtk_iommu_domain_finalise(dom)) | |
334 | goto put_dma_cookie; | |
0df4fabe YW |
335 | |
336 | dom->domain.geometry.aperture_start = 0; | |
337 | dom->domain.geometry.aperture_end = DMA_BIT_MASK(32); | |
338 | dom->domain.geometry.force_aperture = true; | |
339 | ||
340 | return &dom->domain; | |
4b00f5ac YW |
341 | |
342 | put_dma_cookie: | |
343 | iommu_put_dma_cookie(&dom->domain); | |
344 | free_dom: | |
345 | kfree(dom); | |
346 | return NULL; | |
0df4fabe YW |
347 | } |
348 | ||
349 | static void mtk_iommu_domain_free(struct iommu_domain *domain) | |
350 | { | |
4b00f5ac YW |
351 | struct mtk_iommu_domain *dom = to_mtk_domain(domain); |
352 | ||
353 | free_io_pgtable_ops(dom->iop); | |
0df4fabe YW |
354 | iommu_put_dma_cookie(domain); |
355 | kfree(to_mtk_domain(domain)); | |
356 | } | |
357 | ||
358 | static int mtk_iommu_attach_device(struct iommu_domain *domain, | |
359 | struct device *dev) | |
360 | { | |
361 | struct mtk_iommu_domain *dom = to_mtk_domain(domain); | |
a9bf2eec | 362 | struct mtk_iommu_data *data = dev_iommu_fwspec_get(dev)->iommu_priv; |
0df4fabe | 363 | |
4b00f5ac | 364 | if (!data) |
0df4fabe YW |
365 | return -ENODEV; |
366 | ||
4b00f5ac | 367 | /* Update the pgtable base address register of the M4U HW */ |
0df4fabe YW |
368 | if (!data->m4u_dom) { |
369 | data->m4u_dom = dom; | |
907ba6a1 | 370 | writel(dom->cfg.arm_v7s_cfg.ttbr[0] & MMU_PT_ADDR_MASK, |
4b00f5ac | 371 | data->base + REG_MMU_PT_BASE_ADDR); |
7c3a2ec0 YW |
372 | } |
373 | ||
4b00f5ac | 374 | mtk_iommu_config(data, dev, true); |
0df4fabe YW |
375 | return 0; |
376 | } | |
377 | ||
378 | static void mtk_iommu_detach_device(struct iommu_domain *domain, | |
379 | struct device *dev) | |
380 | { | |
a9bf2eec | 381 | struct mtk_iommu_data *data = dev_iommu_fwspec_get(dev)->iommu_priv; |
0df4fabe | 382 | |
58f0d1d5 | 383 | if (!data) |
0df4fabe YW |
384 | return; |
385 | ||
0df4fabe YW |
386 | mtk_iommu_config(data, dev, false); |
387 | } | |
388 | ||
389 | static int mtk_iommu_map(struct iommu_domain *domain, unsigned long iova, | |
390 | phys_addr_t paddr, size_t size, int prot) | |
391 | { | |
392 | struct mtk_iommu_domain *dom = to_mtk_domain(domain); | |
b4dad40e | 393 | struct mtk_iommu_data *data = mtk_iommu_get_m4u_data(); |
0df4fabe | 394 | |
b4dad40e YW |
395 | /* The "4GB mode" M4U physically can not use the lower remap of Dram. */ |
396 | if (data->enable_4GB) | |
397 | paddr |= BIT_ULL(32); | |
398 | ||
60829b4d YW |
399 | /* Synchronize with the tlb_lock */ |
400 | return dom->iop->map(dom->iop, iova, paddr, size, prot); | |
0df4fabe YW |
401 | } |
402 | ||
403 | static size_t mtk_iommu_unmap(struct iommu_domain *domain, | |
56f8af5e WD |
404 | unsigned long iova, size_t size, |
405 | struct iommu_iotlb_gather *gather) | |
0df4fabe YW |
406 | { |
407 | struct mtk_iommu_domain *dom = to_mtk_domain(domain); | |
0df4fabe | 408 | |
60829b4d | 409 | return dom->iop->unmap(dom->iop, iova, size, gather); |
0df4fabe YW |
410 | } |
411 | ||
56f8af5e WD |
412 | static void mtk_iommu_flush_iotlb_all(struct iommu_domain *domain) |
413 | { | |
2009122f | 414 | mtk_iommu_tlb_flush_all(mtk_iommu_get_m4u_data()); |
56f8af5e WD |
415 | } |
416 | ||
417 | static void mtk_iommu_iotlb_sync(struct iommu_domain *domain, | |
418 | struct iommu_iotlb_gather *gather) | |
4d689b61 | 419 | { |
da3cc91b | 420 | struct mtk_iommu_data *data = mtk_iommu_get_m4u_data(); |
a7a04ea3 | 421 | size_t length = gather->end - gather->start; |
da3cc91b | 422 | |
a7a04ea3 YW |
423 | if (gather->start == ULONG_MAX) |
424 | return; | |
425 | ||
1f4fd624 | 426 | mtk_iommu_tlb_flush_range_sync(gather->start, length, gather->pgsize, |
67caf7e2 | 427 | data); |
4d689b61 RM |
428 | } |
429 | ||
0df4fabe YW |
430 | static phys_addr_t mtk_iommu_iova_to_phys(struct iommu_domain *domain, |
431 | dma_addr_t iova) | |
432 | { | |
433 | struct mtk_iommu_domain *dom = to_mtk_domain(domain); | |
30e2fccf | 434 | struct mtk_iommu_data *data = mtk_iommu_get_m4u_data(); |
0df4fabe YW |
435 | phys_addr_t pa; |
436 | ||
0df4fabe | 437 | pa = dom->iop->iova_to_phys(dom->iop, iova); |
b4dad40e YW |
438 | if (data->enable_4GB && pa >= MTK_IOMMU_4GB_MODE_REMAP_BASE) |
439 | pa &= ~BIT_ULL(32); | |
30e2fccf | 440 | |
0df4fabe YW |
441 | return pa; |
442 | } | |
443 | ||
444 | static int mtk_iommu_add_device(struct device *dev) | |
445 | { | |
a9bf2eec | 446 | struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); |
b16c0170 | 447 | struct mtk_iommu_data *data; |
0df4fabe YW |
448 | struct iommu_group *group; |
449 | ||
a9bf2eec | 450 | if (!fwspec || fwspec->ops != &mtk_iommu_ops) |
58f0d1d5 | 451 | return -ENODEV; /* Not a iommu client device */ |
0df4fabe | 452 | |
a9bf2eec | 453 | data = fwspec->iommu_priv; |
b16c0170 JR |
454 | iommu_device_link(&data->iommu, dev); |
455 | ||
0df4fabe YW |
456 | group = iommu_group_get_for_dev(dev); |
457 | if (IS_ERR(group)) | |
458 | return PTR_ERR(group); | |
459 | ||
460 | iommu_group_put(group); | |
461 | return 0; | |
462 | } | |
463 | ||
464 | static void mtk_iommu_remove_device(struct device *dev) | |
465 | { | |
a9bf2eec | 466 | struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); |
b16c0170 JR |
467 | struct mtk_iommu_data *data; |
468 | ||
a9bf2eec | 469 | if (!fwspec || fwspec->ops != &mtk_iommu_ops) |
0df4fabe YW |
470 | return; |
471 | ||
a9bf2eec | 472 | data = fwspec->iommu_priv; |
b16c0170 JR |
473 | iommu_device_unlink(&data->iommu, dev); |
474 | ||
0df4fabe | 475 | iommu_group_remove_device(dev); |
58f0d1d5 | 476 | iommu_fwspec_free(dev); |
0df4fabe YW |
477 | } |
478 | ||
479 | static struct iommu_group *mtk_iommu_device_group(struct device *dev) | |
480 | { | |
7c3a2ec0 | 481 | struct mtk_iommu_data *data = mtk_iommu_get_m4u_data(); |
0df4fabe | 482 | |
58f0d1d5 | 483 | if (!data) |
0df4fabe YW |
484 | return ERR_PTR(-ENODEV); |
485 | ||
486 | /* All the client devices are in the same m4u iommu-group */ | |
0df4fabe YW |
487 | if (!data->m4u_group) { |
488 | data->m4u_group = iommu_group_alloc(); | |
489 | if (IS_ERR(data->m4u_group)) | |
490 | dev_err(dev, "Failed to allocate M4U IOMMU group\n"); | |
3a8d40b6 RM |
491 | } else { |
492 | iommu_group_ref_get(data->m4u_group); | |
0df4fabe YW |
493 | } |
494 | return data->m4u_group; | |
495 | } | |
496 | ||
497 | static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args) | |
498 | { | |
a9bf2eec | 499 | struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); |
0df4fabe YW |
500 | struct platform_device *m4updev; |
501 | ||
502 | if (args->args_count != 1) { | |
503 | dev_err(dev, "invalid #iommu-cells(%d) property for IOMMU\n", | |
504 | args->args_count); | |
505 | return -EINVAL; | |
506 | } | |
507 | ||
a9bf2eec | 508 | if (!fwspec->iommu_priv) { |
0df4fabe YW |
509 | /* Get the m4u device */ |
510 | m4updev = of_find_device_by_node(args->np); | |
0df4fabe YW |
511 | if (WARN_ON(!m4updev)) |
512 | return -EINVAL; | |
513 | ||
a9bf2eec | 514 | fwspec->iommu_priv = platform_get_drvdata(m4updev); |
0df4fabe YW |
515 | } |
516 | ||
58f0d1d5 | 517 | return iommu_fwspec_add_ids(dev, args->args, 1); |
0df4fabe YW |
518 | } |
519 | ||
b65f5016 | 520 | static const struct iommu_ops mtk_iommu_ops = { |
0df4fabe YW |
521 | .domain_alloc = mtk_iommu_domain_alloc, |
522 | .domain_free = mtk_iommu_domain_free, | |
523 | .attach_dev = mtk_iommu_attach_device, | |
524 | .detach_dev = mtk_iommu_detach_device, | |
525 | .map = mtk_iommu_map, | |
526 | .unmap = mtk_iommu_unmap, | |
56f8af5e | 527 | .flush_iotlb_all = mtk_iommu_flush_iotlb_all, |
4d689b61 | 528 | .iotlb_sync = mtk_iommu_iotlb_sync, |
0df4fabe YW |
529 | .iova_to_phys = mtk_iommu_iova_to_phys, |
530 | .add_device = mtk_iommu_add_device, | |
531 | .remove_device = mtk_iommu_remove_device, | |
532 | .device_group = mtk_iommu_device_group, | |
533 | .of_xlate = mtk_iommu_of_xlate, | |
534 | .pgsize_bitmap = SZ_4K | SZ_64K | SZ_1M | SZ_16M, | |
535 | }; | |
536 | ||
537 | static int mtk_iommu_hw_init(const struct mtk_iommu_data *data) | |
538 | { | |
539 | u32 regval; | |
540 | int ret; | |
541 | ||
542 | ret = clk_prepare_enable(data->bclk); | |
543 | if (ret) { | |
544 | dev_err(data->dev, "Failed to enable iommu bclk(%d)\n", ret); | |
545 | return ret; | |
546 | } | |
547 | ||
cecdce9d | 548 | if (data->plat_data->m4u_plat == M4U_MT8173) |
acb3c92a YW |
549 | regval = F_MMU_PREFETCH_RT_REPLACE_MOD | |
550 | F_MMU_TF_PROT_TO_PROGRAM_ADDR_MT8173; | |
551 | else | |
552 | regval = F_MMU_TF_PROT_TO_PROGRAM_ADDR; | |
0df4fabe YW |
553 | writel_relaxed(regval, data->base + REG_MMU_CTRL_REG); |
554 | ||
555 | regval = F_L2_MULIT_HIT_EN | | |
556 | F_TABLE_WALK_FAULT_INT_EN | | |
557 | F_PREETCH_FIFO_OVERFLOW_INT_EN | | |
558 | F_MISS_FIFO_OVERFLOW_INT_EN | | |
559 | F_PREFETCH_FIFO_ERR_INT_EN | | |
560 | F_MISS_FIFO_ERR_INT_EN; | |
561 | writel_relaxed(regval, data->base + REG_MMU_INT_CONTROL0); | |
562 | ||
563 | regval = F_INT_TRANSLATION_FAULT | | |
564 | F_INT_MAIN_MULTI_HIT_FAULT | | |
565 | F_INT_INVALID_PA_FAULT | | |
566 | F_INT_ENTRY_REPLACEMENT_FAULT | | |
567 | F_INT_TLB_MISS_FAULT | | |
568 | F_INT_MISS_TRANSACTION_FIFO_FAULT | | |
569 | F_INT_PRETETCH_TRANSATION_FIFO_FAULT; | |
570 | writel_relaxed(regval, data->base + REG_MMU_INT_MAIN_CONTROL); | |
571 | ||
cecdce9d | 572 | if (data->plat_data->m4u_plat == M4U_MT8173) |
70ca608b YW |
573 | regval = (data->protect_base >> 1) | (data->enable_4GB << 31); |
574 | else | |
575 | regval = lower_32_bits(data->protect_base) | | |
576 | upper_32_bits(data->protect_base); | |
577 | writel_relaxed(regval, data->base + REG_MMU_IVRP_PADDR); | |
578 | ||
2b326d8b | 579 | if (data->enable_4GB && data->plat_data->has_vld_pa_rng) { |
30e2fccf YW |
580 | /* |
581 | * If 4GB mode is enabled, the validate PA range is from | |
582 | * 0x1_0000_0000 to 0x1_ffff_ffff. here record bit[32:30]. | |
583 | */ | |
584 | regval = F_MMU_VLD_PA_RNG(7, 4); | |
585 | writel_relaxed(regval, data->base + REG_MMU_VLD_PA_RNG); | |
586 | } | |
0df4fabe | 587 | writel_relaxed(0, data->base + REG_MMU_DCM_DIS); |
e6dec923 | 588 | |
50822b0b | 589 | if (data->plat_data->reset_axi) |
e6dec923 | 590 | writel_relaxed(0, data->base + REG_MMU_STANDARD_AXI_MODE); |
0df4fabe YW |
591 | |
592 | if (devm_request_irq(data->dev, data->irq, mtk_iommu_isr, 0, | |
593 | dev_name(data->dev), (void *)data)) { | |
594 | writel_relaxed(0, data->base + REG_MMU_PT_BASE_ADDR); | |
595 | clk_disable_unprepare(data->bclk); | |
596 | dev_err(data->dev, "Failed @ IRQ-%d Request\n", data->irq); | |
597 | return -ENODEV; | |
598 | } | |
599 | ||
600 | return 0; | |
601 | } | |
602 | ||
0df4fabe YW |
603 | static const struct component_master_ops mtk_iommu_com_ops = { |
604 | .bind = mtk_iommu_bind, | |
605 | .unbind = mtk_iommu_unbind, | |
606 | }; | |
607 | ||
608 | static int mtk_iommu_probe(struct platform_device *pdev) | |
609 | { | |
610 | struct mtk_iommu_data *data; | |
611 | struct device *dev = &pdev->dev; | |
612 | struct resource *res; | |
b16c0170 | 613 | resource_size_t ioaddr; |
0df4fabe YW |
614 | struct component_match *match = NULL; |
615 | void *protect; | |
0b6c0ad3 | 616 | int i, larb_nr, ret; |
0df4fabe YW |
617 | |
618 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); | |
619 | if (!data) | |
620 | return -ENOMEM; | |
621 | data->dev = dev; | |
cecdce9d | 622 | data->plat_data = of_device_get_match_data(dev); |
0df4fabe YW |
623 | |
624 | /* Protect memory. HW will access here while translation fault.*/ | |
625 | protect = devm_kzalloc(dev, MTK_PROTECT_PA_ALIGN * 2, GFP_KERNEL); | |
626 | if (!protect) | |
627 | return -ENOMEM; | |
628 | data->protect_base = ALIGN(virt_to_phys(protect), MTK_PROTECT_PA_ALIGN); | |
629 | ||
01e23c93 | 630 | /* Whether the current dram is over 4GB */ |
41939980 | 631 | data->enable_4GB = !!(max_pfn > (BIT_ULL(32) >> PAGE_SHIFT)); |
b4dad40e YW |
632 | if (!data->plat_data->has_4gb_mode) |
633 | data->enable_4GB = false; | |
01e23c93 | 634 | |
0df4fabe YW |
635 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
636 | data->base = devm_ioremap_resource(dev, res); | |
637 | if (IS_ERR(data->base)) | |
638 | return PTR_ERR(data->base); | |
b16c0170 | 639 | ioaddr = res->start; |
0df4fabe YW |
640 | |
641 | data->irq = platform_get_irq(pdev, 0); | |
642 | if (data->irq < 0) | |
643 | return data->irq; | |
644 | ||
2aa4c259 YW |
645 | if (data->plat_data->has_bclk) { |
646 | data->bclk = devm_clk_get(dev, "bclk"); | |
647 | if (IS_ERR(data->bclk)) | |
648 | return PTR_ERR(data->bclk); | |
649 | } | |
0df4fabe YW |
650 | |
651 | larb_nr = of_count_phandle_with_args(dev->of_node, | |
652 | "mediatek,larbs", NULL); | |
653 | if (larb_nr < 0) | |
654 | return larb_nr; | |
0df4fabe YW |
655 | |
656 | for (i = 0; i < larb_nr; i++) { | |
657 | struct device_node *larbnode; | |
658 | struct platform_device *plarbdev; | |
e6dec923 | 659 | u32 id; |
0df4fabe YW |
660 | |
661 | larbnode = of_parse_phandle(dev->of_node, "mediatek,larbs", i); | |
662 | if (!larbnode) | |
663 | return -EINVAL; | |
664 | ||
1eb8e4e2 WY |
665 | if (!of_device_is_available(larbnode)) { |
666 | of_node_put(larbnode); | |
0df4fabe | 667 | continue; |
1eb8e4e2 | 668 | } |
0df4fabe | 669 | |
e6dec923 YW |
670 | ret = of_property_read_u32(larbnode, "mediatek,larb-id", &id); |
671 | if (ret)/* The id is consecutive if there is no this property */ | |
672 | id = i; | |
673 | ||
0df4fabe | 674 | plarbdev = of_find_device_by_node(larbnode); |
1eb8e4e2 WY |
675 | if (!plarbdev) { |
676 | of_node_put(larbnode); | |
e6dec923 | 677 | return -EPROBE_DEFER; |
1eb8e4e2 | 678 | } |
1ee9feb2 | 679 | data->larb_imu[id].dev = &plarbdev->dev; |
0df4fabe | 680 | |
00c7c81f RK |
681 | component_match_add_release(dev, &match, release_of, |
682 | compare_of, larbnode); | |
0df4fabe YW |
683 | } |
684 | ||
685 | platform_set_drvdata(pdev, data); | |
686 | ||
687 | ret = mtk_iommu_hw_init(data); | |
688 | if (ret) | |
689 | return ret; | |
690 | ||
b16c0170 JR |
691 | ret = iommu_device_sysfs_add(&data->iommu, dev, NULL, |
692 | "mtk-iommu.%pa", &ioaddr); | |
693 | if (ret) | |
694 | return ret; | |
695 | ||
696 | iommu_device_set_ops(&data->iommu, &mtk_iommu_ops); | |
697 | iommu_device_set_fwnode(&data->iommu, &pdev->dev.of_node->fwnode); | |
698 | ||
699 | ret = iommu_device_register(&data->iommu); | |
700 | if (ret) | |
701 | return ret; | |
702 | ||
da3cc91b | 703 | spin_lock_init(&data->tlb_lock); |
7c3a2ec0 YW |
704 | list_add_tail(&data->list, &m4ulist); |
705 | ||
0df4fabe YW |
706 | if (!iommu_present(&platform_bus_type)) |
707 | bus_set_iommu(&platform_bus_type, &mtk_iommu_ops); | |
708 | ||
709 | return component_master_add_with_match(dev, &mtk_iommu_com_ops, match); | |
710 | } | |
711 | ||
712 | static int mtk_iommu_remove(struct platform_device *pdev) | |
713 | { | |
714 | struct mtk_iommu_data *data = platform_get_drvdata(pdev); | |
715 | ||
b16c0170 JR |
716 | iommu_device_sysfs_remove(&data->iommu); |
717 | iommu_device_unregister(&data->iommu); | |
718 | ||
0df4fabe YW |
719 | if (iommu_present(&platform_bus_type)) |
720 | bus_set_iommu(&platform_bus_type, NULL); | |
721 | ||
0df4fabe YW |
722 | clk_disable_unprepare(data->bclk); |
723 | devm_free_irq(&pdev->dev, data->irq, data); | |
724 | component_master_del(&pdev->dev, &mtk_iommu_com_ops); | |
725 | return 0; | |
726 | } | |
727 | ||
fd99f796 | 728 | static int __maybe_unused mtk_iommu_suspend(struct device *dev) |
0df4fabe YW |
729 | { |
730 | struct mtk_iommu_data *data = dev_get_drvdata(dev); | |
731 | struct mtk_iommu_suspend_reg *reg = &data->reg; | |
732 | void __iomem *base = data->base; | |
733 | ||
734 | reg->standard_axi_mode = readl_relaxed(base + | |
735 | REG_MMU_STANDARD_AXI_MODE); | |
736 | reg->dcm_dis = readl_relaxed(base + REG_MMU_DCM_DIS); | |
737 | reg->ctrl_reg = readl_relaxed(base + REG_MMU_CTRL_REG); | |
738 | reg->int_control0 = readl_relaxed(base + REG_MMU_INT_CONTROL0); | |
739 | reg->int_main_control = readl_relaxed(base + REG_MMU_INT_MAIN_CONTROL); | |
70ca608b | 740 | reg->ivrp_paddr = readl_relaxed(base + REG_MMU_IVRP_PADDR); |
b9475b34 | 741 | reg->vld_pa_rng = readl_relaxed(base + REG_MMU_VLD_PA_RNG); |
6254b64f | 742 | clk_disable_unprepare(data->bclk); |
0df4fabe YW |
743 | return 0; |
744 | } | |
745 | ||
fd99f796 | 746 | static int __maybe_unused mtk_iommu_resume(struct device *dev) |
0df4fabe YW |
747 | { |
748 | struct mtk_iommu_data *data = dev_get_drvdata(dev); | |
749 | struct mtk_iommu_suspend_reg *reg = &data->reg; | |
907ba6a1 | 750 | struct mtk_iommu_domain *m4u_dom = data->m4u_dom; |
0df4fabe | 751 | void __iomem *base = data->base; |
6254b64f | 752 | int ret; |
0df4fabe | 753 | |
6254b64f YW |
754 | ret = clk_prepare_enable(data->bclk); |
755 | if (ret) { | |
756 | dev_err(data->dev, "Failed to enable clk(%d) in resume\n", ret); | |
757 | return ret; | |
758 | } | |
0df4fabe YW |
759 | writel_relaxed(reg->standard_axi_mode, |
760 | base + REG_MMU_STANDARD_AXI_MODE); | |
761 | writel_relaxed(reg->dcm_dis, base + REG_MMU_DCM_DIS); | |
762 | writel_relaxed(reg->ctrl_reg, base + REG_MMU_CTRL_REG); | |
763 | writel_relaxed(reg->int_control0, base + REG_MMU_INT_CONTROL0); | |
764 | writel_relaxed(reg->int_main_control, base + REG_MMU_INT_MAIN_CONTROL); | |
70ca608b | 765 | writel_relaxed(reg->ivrp_paddr, base + REG_MMU_IVRP_PADDR); |
b9475b34 | 766 | writel_relaxed(reg->vld_pa_rng, base + REG_MMU_VLD_PA_RNG); |
907ba6a1 YW |
767 | if (m4u_dom) |
768 | writel(m4u_dom->cfg.arm_v7s_cfg.ttbr[0] & MMU_PT_ADDR_MASK, | |
e6dec923 | 769 | base + REG_MMU_PT_BASE_ADDR); |
0df4fabe YW |
770 | return 0; |
771 | } | |
772 | ||
e6dec923 | 773 | static const struct dev_pm_ops mtk_iommu_pm_ops = { |
6254b64f | 774 | SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(mtk_iommu_suspend, mtk_iommu_resume) |
0df4fabe YW |
775 | }; |
776 | ||
cecdce9d YW |
777 | static const struct mtk_iommu_plat_data mt2712_data = { |
778 | .m4u_plat = M4U_MT2712, | |
b4dad40e | 779 | .has_4gb_mode = true, |
2aa4c259 | 780 | .has_bclk = true, |
2b326d8b | 781 | .has_vld_pa_rng = true, |
b3e5eee7 | 782 | .larbid_remap = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}, |
cecdce9d YW |
783 | }; |
784 | ||
785 | static const struct mtk_iommu_plat_data mt8173_data = { | |
786 | .m4u_plat = M4U_MT8173, | |
b4dad40e | 787 | .has_4gb_mode = true, |
2aa4c259 | 788 | .has_bclk = true, |
50822b0b | 789 | .reset_axi = true, |
b3e5eee7 | 790 | .larbid_remap = {0, 1, 2, 3, 4, 5}, /* Linear mapping. */ |
cecdce9d YW |
791 | }; |
792 | ||
907ba6a1 YW |
793 | static const struct mtk_iommu_plat_data mt8183_data = { |
794 | .m4u_plat = M4U_MT8183, | |
795 | .reset_axi = true, | |
796 | .larbid_remap = {0, 4, 5, 6, 7, 2, 3, 1}, | |
797 | }; | |
798 | ||
0df4fabe | 799 | static const struct of_device_id mtk_iommu_of_ids[] = { |
cecdce9d YW |
800 | { .compatible = "mediatek,mt2712-m4u", .data = &mt2712_data}, |
801 | { .compatible = "mediatek,mt8173-m4u", .data = &mt8173_data}, | |
907ba6a1 | 802 | { .compatible = "mediatek,mt8183-m4u", .data = &mt8183_data}, |
0df4fabe YW |
803 | {} |
804 | }; | |
805 | ||
806 | static struct platform_driver mtk_iommu_driver = { | |
807 | .probe = mtk_iommu_probe, | |
808 | .remove = mtk_iommu_remove, | |
809 | .driver = { | |
810 | .name = "mtk-iommu", | |
e6dec923 | 811 | .of_match_table = of_match_ptr(mtk_iommu_of_ids), |
0df4fabe YW |
812 | .pm = &mtk_iommu_pm_ops, |
813 | } | |
814 | }; | |
815 | ||
e6dec923 | 816 | static int __init mtk_iommu_init(void) |
0df4fabe YW |
817 | { |
818 | int ret; | |
0df4fabe YW |
819 | |
820 | ret = platform_driver_register(&mtk_iommu_driver); | |
e6dec923 YW |
821 | if (ret != 0) |
822 | pr_err("Failed to register MTK IOMMU driver\n"); | |
0df4fabe | 823 | |
e6dec923 | 824 | return ret; |
0df4fabe YW |
825 | } |
826 | ||
e6dec923 | 827 | subsys_initcall(mtk_iommu_init) |