1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2019, The Linux Foundation. All rights reserved.
4 */
5
6 #include <linux/acpi.h>
7 #include <linux/adreno-smmu-priv.h>
8 #include <linux/delay.h>
9 #include <linux/of_device.h>
10 #include <linux/firmware/qcom/qcom_scm.h>
11 #include <linux/platform_device.h>
12 #include <linux/pm_runtime.h>
13
14 #include "arm-smmu.h"
15 #include "arm-smmu-qcom.h"
16
17 #define QCOM_DUMMY_VAL -1
18
19 /*
20 * SMMU-500 TRM defines BIT(0) as CMTLB (Enable context caching in the
21 * macro TLB) and BIT(1) as CPRE (Enable context caching in the prefetch
22 * buffer). The remaining bits are implementation defined and vary across
23 * SoCs.
24 */
25
26 #define CPRE (1 << 1)
27 #define CMTLB (1 << 0)
28 #define PREFETCH_SHIFT 8
29 #define PREFETCH_DEFAULT 0
30 #define PREFETCH_SHALLOW (1 << PREFETCH_SHIFT)
31 #define PREFETCH_MODERATE (2 << PREFETCH_SHIFT)
32 #define PREFETCH_DEEP (3 << PREFETCH_SHIFT)
33 #define GFX_ACTLR_PRR (1 << 5)
34
35 static const struct of_device_id qcom_smmu_actlr_client_of_match[] = {
36 { .compatible = "qcom,adreno",
37 .data = (const void *) (PREFETCH_DEEP | CPRE | CMTLB) },
38 { .compatible = "qcom,adreno-gmu",
39 .data = (const void *) (PREFETCH_DEEP | CPRE | CMTLB) },
40 { .compatible = "qcom,adreno-smmu",
41 .data = (const void *) (PREFETCH_DEEP | CPRE | CMTLB) },
42 { .compatible = "qcom,fastrpc",
43 .data = (const void *) (PREFETCH_DEEP | CPRE | CMTLB) },
44 { .compatible = "qcom,sc7280-mdss",
45 .data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
46 { .compatible = "qcom,sc7280-venus",
47 .data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
48 { .compatible = "qcom,sm8550-mdss",
49 .data = (const void *) (PREFETCH_DEFAULT | CMTLB) },
50 { }
51 };
52
to_qcom_smmu(struct arm_smmu_device * smmu)53 static struct qcom_smmu *to_qcom_smmu(struct arm_smmu_device *smmu)
54 {
55 return container_of(smmu, struct qcom_smmu, smmu);
56 }
57
qcom_smmu_tlb_sync(struct arm_smmu_device * smmu,int page,int sync,int status)58 static void qcom_smmu_tlb_sync(struct arm_smmu_device *smmu, int page,
59 int sync, int status)
60 {
61 unsigned int spin_cnt, delay;
62 u32 reg;
63
64 arm_smmu_writel(smmu, page, sync, QCOM_DUMMY_VAL);
65 for (delay = 1; delay < TLB_LOOP_TIMEOUT; delay *= 2) {
66 for (spin_cnt = TLB_SPIN_COUNT; spin_cnt > 0; spin_cnt--) {
67 reg = arm_smmu_readl(smmu, page, status);
68 if (!(reg & ARM_SMMU_sTLBGSTATUS_GSACTIVE))
69 return;
70 cpu_relax();
71 }
72 udelay(delay);
73 }
74
75 qcom_smmu_tlb_sync_debug(smmu);
76 }
77
qcom_adreno_smmu_write_sctlr(struct arm_smmu_device * smmu,int idx,u32 reg)78 static void qcom_adreno_smmu_write_sctlr(struct arm_smmu_device *smmu, int idx,
79 u32 reg)
80 {
81 struct qcom_smmu *qsmmu = to_qcom_smmu(smmu);
82
83 /*
84 * On the GPU device we want to process subsequent transactions after a
85 * fault to keep the GPU from hanging
86 */
87 reg |= ARM_SMMU_SCTLR_HUPCF;
88
89 if (qsmmu->stall_enabled & BIT(idx))
90 reg |= ARM_SMMU_SCTLR_CFCFG;
91
92 arm_smmu_cb_write(smmu, idx, ARM_SMMU_CB_SCTLR, reg);
93 }
94
qcom_adreno_smmu_get_fault_info(const void * cookie,struct adreno_smmu_fault_info * info)95 static void qcom_adreno_smmu_get_fault_info(const void *cookie,
96 struct adreno_smmu_fault_info *info)
97 {
98 struct arm_smmu_domain *smmu_domain = (void *)cookie;
99 struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
100 struct arm_smmu_device *smmu = smmu_domain->smmu;
101
102 info->fsr = arm_smmu_cb_read(smmu, cfg->cbndx, ARM_SMMU_CB_FSR);
103 info->fsynr0 = arm_smmu_cb_read(smmu, cfg->cbndx, ARM_SMMU_CB_FSYNR0);
104 info->fsynr1 = arm_smmu_cb_read(smmu, cfg->cbndx, ARM_SMMU_CB_FSYNR1);
105 info->far = arm_smmu_cb_readq(smmu, cfg->cbndx, ARM_SMMU_CB_FAR);
106 info->cbfrsynra = arm_smmu_gr1_read(smmu, ARM_SMMU_GR1_CBFRSYNRA(cfg->cbndx));
107 info->ttbr0 = arm_smmu_cb_readq(smmu, cfg->cbndx, ARM_SMMU_CB_TTBR0);
108 info->contextidr = arm_smmu_cb_read(smmu, cfg->cbndx, ARM_SMMU_CB_CONTEXTIDR);
109 }
110
qcom_adreno_smmu_set_stall(const void * cookie,bool enabled)111 static void qcom_adreno_smmu_set_stall(const void *cookie, bool enabled)
112 {
113 struct arm_smmu_domain *smmu_domain = (void *)cookie;
114 struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
115 struct arm_smmu_device *smmu = smmu_domain->smmu;
116 struct qcom_smmu *qsmmu = to_qcom_smmu(smmu);
117 u32 mask = BIT(cfg->cbndx);
118 bool stall_changed = !!(qsmmu->stall_enabled & mask) != enabled;
119 unsigned long flags;
120
121 if (enabled)
122 qsmmu->stall_enabled |= mask;
123 else
124 qsmmu->stall_enabled &= ~mask;
125
126 /*
127 * If the device is on and we changed the setting, update the register.
128 * The spec pseudocode says that CFCFG is resampled after a fault, and
129 * we believe that no implementations cache it in the TLB, so it should
130 * be safe to change it without a TLB invalidation.
131 */
132 if (stall_changed && pm_runtime_get_if_active(smmu->dev) > 0) {
133 u32 reg;
134
135 spin_lock_irqsave(&smmu_domain->cb_lock, flags);
136 reg = arm_smmu_cb_read(smmu, cfg->cbndx, ARM_SMMU_CB_SCTLR);
137
138 if (enabled)
139 reg |= ARM_SMMU_SCTLR_CFCFG;
140 else
141 reg &= ~ARM_SMMU_SCTLR_CFCFG;
142
143 arm_smmu_cb_write(smmu, cfg->cbndx, ARM_SMMU_CB_SCTLR, reg);
144 spin_unlock_irqrestore(&smmu_domain->cb_lock, flags);
145
146 pm_runtime_put_autosuspend(smmu->dev);
147 }
148 }
149
qcom_adreno_smmu_set_prr_bit(const void * cookie,bool set)150 static void qcom_adreno_smmu_set_prr_bit(const void *cookie, bool set)
151 {
152 struct arm_smmu_domain *smmu_domain = (void *)cookie;
153 struct arm_smmu_device *smmu = smmu_domain->smmu;
154 struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
155 u32 reg = 0;
156 int ret;
157
158 ret = pm_runtime_resume_and_get(smmu->dev);
159 if (ret < 0) {
160 dev_err(smmu->dev, "failed to get runtime PM: %d\n", ret);
161 return;
162 }
163
164 reg = arm_smmu_cb_read(smmu, cfg->cbndx, ARM_SMMU_CB_ACTLR);
165 reg &= ~GFX_ACTLR_PRR;
166 if (set)
167 reg |= FIELD_PREP(GFX_ACTLR_PRR, 1);
168 arm_smmu_cb_write(smmu, cfg->cbndx, ARM_SMMU_CB_ACTLR, reg);
169 pm_runtime_put_autosuspend(smmu->dev);
170 }
171
qcom_adreno_smmu_set_prr_addr(const void * cookie,phys_addr_t page_addr)172 static void qcom_adreno_smmu_set_prr_addr(const void *cookie, phys_addr_t page_addr)
173 {
174 struct arm_smmu_domain *smmu_domain = (void *)cookie;
175 struct arm_smmu_device *smmu = smmu_domain->smmu;
176 int ret;
177
178 ret = pm_runtime_resume_and_get(smmu->dev);
179 if (ret < 0) {
180 dev_err(smmu->dev, "failed to get runtime PM: %d\n", ret);
181 return;
182 }
183
184 writel_relaxed(lower_32_bits(page_addr),
185 smmu->base + ARM_SMMU_GFX_PRR_CFG_LADDR);
186 writel_relaxed(upper_32_bits(page_addr),
187 smmu->base + ARM_SMMU_GFX_PRR_CFG_UADDR);
188 pm_runtime_put_autosuspend(smmu->dev);
189 }
190
191 #define QCOM_ADRENO_SMMU_GPU_SID 0
192
qcom_adreno_smmu_is_gpu_device(struct device * dev)193 static bool qcom_adreno_smmu_is_gpu_device(struct device *dev)
194 {
195 struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
196 int i;
197
198 /*
199 * The GPU will always use SID 0 so that is a handy way to uniquely
200 * identify it and configure it for per-instance pagetables
201 */
202 for (i = 0; i < fwspec->num_ids; i++) {
203 u16 sid = FIELD_GET(ARM_SMMU_SMR_ID, fwspec->ids[i]);
204
205 if (sid == QCOM_ADRENO_SMMU_GPU_SID)
206 return true;
207 }
208
209 return false;
210 }
211
qcom_adreno_smmu_get_ttbr1_cfg(const void * cookie)212 static const struct io_pgtable_cfg *qcom_adreno_smmu_get_ttbr1_cfg(
213 const void *cookie)
214 {
215 struct arm_smmu_domain *smmu_domain = (void *)cookie;
216 struct io_pgtable *pgtable =
217 io_pgtable_ops_to_pgtable(smmu_domain->pgtbl_ops);
218 return &pgtable->cfg;
219 }
220
221 /*
222 * Local implementation to configure TTBR0 with the specified pagetable config.
223 * The GPU driver will call this to enable TTBR0 when per-instance pagetables
224 * are active
225 */
226
qcom_adreno_smmu_set_ttbr0_cfg(const void * cookie,const struct io_pgtable_cfg * pgtbl_cfg)227 static int qcom_adreno_smmu_set_ttbr0_cfg(const void *cookie,
228 const struct io_pgtable_cfg *pgtbl_cfg)
229 {
230 struct arm_smmu_domain *smmu_domain = (void *)cookie;
231 struct io_pgtable *pgtable = io_pgtable_ops_to_pgtable(smmu_domain->pgtbl_ops);
232 struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
233 struct arm_smmu_cb *cb = &smmu_domain->smmu->cbs[cfg->cbndx];
234
235 /* The domain must have split pagetables already enabled */
236 if (cb->tcr[0] & ARM_SMMU_TCR_EPD1)
237 return -EINVAL;
238
239 /* If the pagetable config is NULL, disable TTBR0 */
240 if (!pgtbl_cfg) {
241 /* Do nothing if it is already disabled */
242 if ((cb->tcr[0] & ARM_SMMU_TCR_EPD0))
243 return -EINVAL;
244
245 /* Set TCR to the original configuration */
246 cb->tcr[0] = arm_smmu_lpae_tcr(&pgtable->cfg);
247 cb->ttbr[0] = FIELD_PREP(ARM_SMMU_TTBRn_ASID, cb->cfg->asid);
248 } else {
249 u32 tcr = cb->tcr[0];
250
251 /* Don't call this again if TTBR0 is already enabled */
252 if (!(cb->tcr[0] & ARM_SMMU_TCR_EPD0))
253 return -EINVAL;
254
255 tcr |= arm_smmu_lpae_tcr(pgtbl_cfg);
256 tcr &= ~(ARM_SMMU_TCR_EPD0 | ARM_SMMU_TCR_EPD1);
257
258 cb->tcr[0] = tcr;
259 cb->ttbr[0] = pgtbl_cfg->arm_lpae_s1_cfg.ttbr;
260 cb->ttbr[0] |= FIELD_PREP(ARM_SMMU_TTBRn_ASID, cb->cfg->asid);
261 }
262
263 arm_smmu_write_context_bank(smmu_domain->smmu, cb->cfg->cbndx);
264
265 return 0;
266 }
267
qcom_adreno_smmu_alloc_context_bank(struct arm_smmu_domain * smmu_domain,struct arm_smmu_device * smmu,struct device * dev,int start)268 static int qcom_adreno_smmu_alloc_context_bank(struct arm_smmu_domain *smmu_domain,
269 struct arm_smmu_device *smmu,
270 struct device *dev, int start)
271 {
272 int count;
273
274 /*
275 * Assign context bank 0 to the GPU device so the GPU hardware can
276 * switch pagetables
277 */
278 if (qcom_adreno_smmu_is_gpu_device(dev)) {
279 start = 0;
280 count = 1;
281 } else {
282 start = 1;
283 count = smmu->num_context_banks;
284 }
285
286 return __arm_smmu_alloc_bitmap(smmu->context_map, start, count);
287 }
288
qcom_adreno_can_do_ttbr1(struct arm_smmu_device * smmu)289 static bool qcom_adreno_can_do_ttbr1(struct arm_smmu_device *smmu)
290 {
291 const struct device_node *np = smmu->dev->of_node;
292
293 if (of_device_is_compatible(np, "qcom,msm8996-smmu-v2"))
294 return false;
295
296 return true;
297 }
298
qcom_smmu_set_actlr_dev(struct device * dev,struct arm_smmu_device * smmu,int cbndx,const struct of_device_id * client_match)299 static void qcom_smmu_set_actlr_dev(struct device *dev, struct arm_smmu_device *smmu, int cbndx,
300 const struct of_device_id *client_match)
301 {
302 const struct of_device_id *match =
303 of_match_device(client_match, dev);
304
305 if (!match) {
306 dev_dbg(dev, "no ACTLR settings present\n");
307 return;
308 }
309
310 arm_smmu_cb_write(smmu, cbndx, ARM_SMMU_CB_ACTLR, (unsigned long)match->data);
311 }
312
qcom_adreno_smmu_init_context(struct arm_smmu_domain * smmu_domain,struct io_pgtable_cfg * pgtbl_cfg,struct device * dev)313 static int qcom_adreno_smmu_init_context(struct arm_smmu_domain *smmu_domain,
314 struct io_pgtable_cfg *pgtbl_cfg, struct device *dev)
315 {
316 const struct device_node *np = smmu_domain->smmu->dev->of_node;
317 struct arm_smmu_device *smmu = smmu_domain->smmu;
318 struct qcom_smmu *qsmmu = to_qcom_smmu(smmu);
319 const struct of_device_id *client_match;
320 int cbndx = smmu_domain->cfg.cbndx;
321 struct adreno_smmu_priv *priv;
322
323 smmu_domain->cfg.flush_walk_prefer_tlbiasid = true;
324
325 client_match = qsmmu->data->client_match;
326
327 if (client_match)
328 qcom_smmu_set_actlr_dev(dev, smmu, cbndx, client_match);
329
330 /* Only enable split pagetables for the GPU device (SID 0) */
331 if (!qcom_adreno_smmu_is_gpu_device(dev))
332 return 0;
333
334 /*
335 * All targets that use the qcom,adreno-smmu compatible string *should*
336 * be AARCH64 stage 1 but double check because the arm-smmu code assumes
337 * that is the case when the TTBR1 quirk is enabled
338 */
339 if (qcom_adreno_can_do_ttbr1(smmu_domain->smmu) &&
340 (smmu_domain->stage == ARM_SMMU_DOMAIN_S1) &&
341 (smmu_domain->cfg.fmt == ARM_SMMU_CTX_FMT_AARCH64))
342 pgtbl_cfg->quirks |= IO_PGTABLE_QUIRK_ARM_TTBR1;
343
344 /*
345 * Initialize private interface with GPU:
346 */
347
348 priv = dev_get_drvdata(dev);
349 priv->cookie = smmu_domain;
350 priv->get_ttbr1_cfg = qcom_adreno_smmu_get_ttbr1_cfg;
351 priv->set_ttbr0_cfg = qcom_adreno_smmu_set_ttbr0_cfg;
352 priv->get_fault_info = qcom_adreno_smmu_get_fault_info;
353 priv->set_stall = qcom_adreno_smmu_set_stall;
354 priv->set_prr_bit = NULL;
355 priv->set_prr_addr = NULL;
356
357 if (of_device_is_compatible(np, "qcom,smmu-500") &&
358 !of_device_is_compatible(np, "qcom,sm8250-smmu-500") &&
359 of_device_is_compatible(np, "qcom,adreno-smmu")) {
360 priv->set_prr_bit = qcom_adreno_smmu_set_prr_bit;
361 priv->set_prr_addr = qcom_adreno_smmu_set_prr_addr;
362 }
363
364 return 0;
365 }
366
367 static const struct of_device_id qcom_smmu_client_of_match[] __maybe_unused = {
368 { .compatible = "qcom,adreno" },
369 { .compatible = "qcom,adreno-gmu" },
370 { .compatible = "qcom,mdp4" },
371 { .compatible = "qcom,mdss" },
372 { .compatible = "qcom,qcm2290-mdss" },
373 { .compatible = "qcom,sar2130p-mdss" },
374 { .compatible = "qcom,sc7180-mdss" },
375 { .compatible = "qcom,sc7180-mss-pil" },
376 { .compatible = "qcom,sc7280-mdss" },
377 { .compatible = "qcom,sc7280-mss-pil" },
378 { .compatible = "qcom,sc8180x-mdss" },
379 { .compatible = "qcom,sc8280xp-mdss" },
380 { .compatible = "qcom,sdm670-mdss" },
381 { .compatible = "qcom,sdm845-mdss" },
382 { .compatible = "qcom,sdm845-mss-pil" },
383 { .compatible = "qcom,sm6115-mdss" },
384 { .compatible = "qcom,sm6350-mdss" },
385 { .compatible = "qcom,sm6375-mdss" },
386 { .compatible = "qcom,sm8150-mdss" },
387 { .compatible = "qcom,sm8250-mdss" },
388 { .compatible = "qcom,x1e80100-mdss" },
389 { }
390 };
391
qcom_smmu_init_context(struct arm_smmu_domain * smmu_domain,struct io_pgtable_cfg * pgtbl_cfg,struct device * dev)392 static int qcom_smmu_init_context(struct arm_smmu_domain *smmu_domain,
393 struct io_pgtable_cfg *pgtbl_cfg, struct device *dev)
394 {
395 struct arm_smmu_device *smmu = smmu_domain->smmu;
396 struct qcom_smmu *qsmmu = to_qcom_smmu(smmu);
397 const struct of_device_id *client_match;
398 int cbndx = smmu_domain->cfg.cbndx;
399
400 smmu_domain->cfg.flush_walk_prefer_tlbiasid = true;
401
402 client_match = qsmmu->data->client_match;
403
404 if (client_match)
405 qcom_smmu_set_actlr_dev(dev, smmu, cbndx, client_match);
406
407 return 0;
408 }
409
qcom_smmu_cfg_probe(struct arm_smmu_device * smmu)410 static int qcom_smmu_cfg_probe(struct arm_smmu_device *smmu)
411 {
412 struct qcom_smmu *qsmmu = to_qcom_smmu(smmu);
413 unsigned int last_s2cr;
414 u32 reg;
415 u32 smr;
416 int i;
417
418 /*
419 * MSM8998 LPASS SMMU reports 13 context banks, but accessing
420 * the last context bank crashes the system.
421 */
422 if (of_device_is_compatible(smmu->dev->of_node, "qcom,msm8998-smmu-v2") &&
423 smmu->num_context_banks == 13) {
424 smmu->num_context_banks = 12;
425 } else if (of_device_is_compatible(smmu->dev->of_node, "qcom,sdm630-smmu-v2")) {
426 if (smmu->num_context_banks == 21) /* SDM630 / SDM660 A2NOC SMMU */
427 smmu->num_context_banks = 7;
428 else if (smmu->num_context_banks == 14) /* SDM630 / SDM660 LPASS SMMU */
429 smmu->num_context_banks = 13;
430 }
431
432 /*
433 * Some platforms support more than the Arm SMMU architected maximum of
434 * 128 stream matching groups. For unknown reasons, the additional
435 * groups don't exhibit the same behavior as the architected registers,
436 * so limit the groups to 128 until the behavior is fixed for the other
437 * groups.
438 */
439 if (smmu->num_mapping_groups > 128) {
440 dev_notice(smmu->dev, "\tLimiting the stream matching groups to 128\n");
441 smmu->num_mapping_groups = 128;
442 }
443
444 last_s2cr = ARM_SMMU_GR0_S2CR(smmu->num_mapping_groups - 1);
445
446 /*
447 * With some firmware versions writes to S2CR of type FAULT are
448 * ignored, and writing BYPASS will end up written as FAULT in the
449 * register. Perform a write to S2CR to detect if this is the case and
450 * if so reserve a context bank to emulate bypass streams.
451 */
452 reg = FIELD_PREP(ARM_SMMU_S2CR_TYPE, S2CR_TYPE_BYPASS) |
453 FIELD_PREP(ARM_SMMU_S2CR_CBNDX, 0xff) |
454 FIELD_PREP(ARM_SMMU_S2CR_PRIVCFG, S2CR_PRIVCFG_DEFAULT);
455 arm_smmu_gr0_write(smmu, last_s2cr, reg);
456 reg = arm_smmu_gr0_read(smmu, last_s2cr);
457 if (FIELD_GET(ARM_SMMU_S2CR_TYPE, reg) != S2CR_TYPE_BYPASS) {
458 qsmmu->bypass_quirk = true;
459 qsmmu->bypass_cbndx = smmu->num_context_banks - 1;
460
461 set_bit(qsmmu->bypass_cbndx, smmu->context_map);
462
463 arm_smmu_cb_write(smmu, qsmmu->bypass_cbndx, ARM_SMMU_CB_SCTLR, 0);
464
465 reg = FIELD_PREP(ARM_SMMU_CBAR_TYPE, CBAR_TYPE_S1_TRANS_S2_BYPASS);
466 arm_smmu_gr1_write(smmu, ARM_SMMU_GR1_CBAR(qsmmu->bypass_cbndx), reg);
467 }
468
469 for (i = 0; i < smmu->num_mapping_groups; i++) {
470 smr = arm_smmu_gr0_read(smmu, ARM_SMMU_GR0_SMR(i));
471
472 if (FIELD_GET(ARM_SMMU_SMR_VALID, smr)) {
473 /* Ignore valid bit for SMR mask extraction. */
474 smr &= ~ARM_SMMU_SMR_VALID;
475 smmu->smrs[i].id = FIELD_GET(ARM_SMMU_SMR_ID, smr);
476 smmu->smrs[i].mask = FIELD_GET(ARM_SMMU_SMR_MASK, smr);
477 smmu->smrs[i].valid = true;
478
479 smmu->s2crs[i].type = S2CR_TYPE_BYPASS;
480 smmu->s2crs[i].privcfg = S2CR_PRIVCFG_DEFAULT;
481 smmu->s2crs[i].cbndx = 0xff;
482 }
483 }
484
485 return 0;
486 }
487
qcom_adreno_smmuv2_cfg_probe(struct arm_smmu_device * smmu)488 static int qcom_adreno_smmuv2_cfg_probe(struct arm_smmu_device *smmu)
489 {
490 /* Support for 16K pages is advertised on some SoCs, but it doesn't seem to work */
491 smmu->features &= ~ARM_SMMU_FEAT_FMT_AARCH64_16K;
492
493 /* TZ protects several last context banks, hide them from Linux */
494 if (of_device_is_compatible(smmu->dev->of_node, "qcom,sdm630-smmu-v2") &&
495 smmu->num_context_banks == 5)
496 smmu->num_context_banks = 2;
497
498 return 0;
499 }
500
qcom_smmu_write_s2cr(struct arm_smmu_device * smmu,int idx)501 static void qcom_smmu_write_s2cr(struct arm_smmu_device *smmu, int idx)
502 {
503 struct arm_smmu_s2cr *s2cr = smmu->s2crs + idx;
504 struct qcom_smmu *qsmmu = to_qcom_smmu(smmu);
505 u32 cbndx = s2cr->cbndx;
506 u32 type = s2cr->type;
507 u32 reg;
508
509 if (qsmmu->bypass_quirk) {
510 if (type == S2CR_TYPE_BYPASS) {
511 /*
512 * Firmware with quirky S2CR handling will substitute
513 * BYPASS writes with FAULT, so point the stream to the
514 * reserved context bank and ask for translation on the
515 * stream
516 */
517 type = S2CR_TYPE_TRANS;
518 cbndx = qsmmu->bypass_cbndx;
519 } else if (type == S2CR_TYPE_FAULT) {
520 /*
521 * Firmware with quirky S2CR handling will ignore FAULT
522 * writes, so trick it to write FAULT by asking for a
523 * BYPASS.
524 */
525 type = S2CR_TYPE_BYPASS;
526 cbndx = 0xff;
527 }
528 }
529
530 reg = FIELD_PREP(ARM_SMMU_S2CR_TYPE, type) |
531 FIELD_PREP(ARM_SMMU_S2CR_CBNDX, cbndx) |
532 FIELD_PREP(ARM_SMMU_S2CR_PRIVCFG, s2cr->privcfg);
533 arm_smmu_gr0_write(smmu, ARM_SMMU_GR0_S2CR(idx), reg);
534 }
535
qcom_smmu_def_domain_type(struct device * dev)536 static int qcom_smmu_def_domain_type(struct device *dev)
537 {
538 const struct of_device_id *match =
539 of_match_device(qcom_smmu_client_of_match, dev);
540
541 return match ? IOMMU_DOMAIN_IDENTITY : 0;
542 }
543
qcom_sdm845_smmu500_reset(struct arm_smmu_device * smmu)544 static int qcom_sdm845_smmu500_reset(struct arm_smmu_device *smmu)
545 {
546 int ret;
547
548 arm_mmu500_reset(smmu);
549
550 /*
551 * To address performance degradation in non-real time clients,
552 * such as USB and UFS, turn off wait-for-safe on sdm845 based boards,
553 * such as MTP and db845, whose firmwares implement secure monitor
554 * call handlers to turn on/off the wait-for-safe logic.
555 */
556 ret = qcom_scm_qsmmu500_wait_safe_toggle(0);
557 if (ret)
558 dev_warn(smmu->dev, "Failed to turn off SAFE logic\n");
559
560 return ret;
561 }
562
563 static const struct arm_smmu_impl qcom_smmu_v2_impl = {
564 .init_context = qcom_smmu_init_context,
565 .cfg_probe = qcom_smmu_cfg_probe,
566 .def_domain_type = qcom_smmu_def_domain_type,
567 .write_s2cr = qcom_smmu_write_s2cr,
568 .tlb_sync = qcom_smmu_tlb_sync,
569 };
570
571 static const struct arm_smmu_impl qcom_smmu_500_impl = {
572 .init_context = qcom_smmu_init_context,
573 .cfg_probe = qcom_smmu_cfg_probe,
574 .def_domain_type = qcom_smmu_def_domain_type,
575 .reset = arm_mmu500_reset,
576 .write_s2cr = qcom_smmu_write_s2cr,
577 .tlb_sync = qcom_smmu_tlb_sync,
578 #ifdef CONFIG_ARM_SMMU_QCOM_DEBUG
579 .context_fault = qcom_smmu_context_fault,
580 .context_fault_needs_threaded_irq = true,
581 #endif
582 };
583
584 static const struct arm_smmu_impl sdm845_smmu_500_impl = {
585 .init_context = qcom_smmu_init_context,
586 .cfg_probe = qcom_smmu_cfg_probe,
587 .def_domain_type = qcom_smmu_def_domain_type,
588 .reset = qcom_sdm845_smmu500_reset,
589 .write_s2cr = qcom_smmu_write_s2cr,
590 .tlb_sync = qcom_smmu_tlb_sync,
591 #ifdef CONFIG_ARM_SMMU_QCOM_DEBUG
592 .context_fault = qcom_smmu_context_fault,
593 .context_fault_needs_threaded_irq = true,
594 #endif
595 };
596
597 static const struct arm_smmu_impl qcom_adreno_smmu_v2_impl = {
598 .init_context = qcom_adreno_smmu_init_context,
599 .cfg_probe = qcom_adreno_smmuv2_cfg_probe,
600 .def_domain_type = qcom_smmu_def_domain_type,
601 .alloc_context_bank = qcom_adreno_smmu_alloc_context_bank,
602 .write_sctlr = qcom_adreno_smmu_write_sctlr,
603 .tlb_sync = qcom_smmu_tlb_sync,
604 .context_fault_needs_threaded_irq = true,
605 };
606
607 static const struct arm_smmu_impl qcom_adreno_smmu_500_impl = {
608 .init_context = qcom_adreno_smmu_init_context,
609 .def_domain_type = qcom_smmu_def_domain_type,
610 .reset = arm_mmu500_reset,
611 .alloc_context_bank = qcom_adreno_smmu_alloc_context_bank,
612 .write_sctlr = qcom_adreno_smmu_write_sctlr,
613 .tlb_sync = qcom_smmu_tlb_sync,
614 .context_fault_needs_threaded_irq = true,
615 };
616
qcom_smmu_create(struct arm_smmu_device * smmu,const struct qcom_smmu_match_data * data)617 static struct arm_smmu_device *qcom_smmu_create(struct arm_smmu_device *smmu,
618 const struct qcom_smmu_match_data *data)
619 {
620 const struct device_node *np = smmu->dev->of_node;
621 const struct arm_smmu_impl *impl;
622 struct qcom_smmu *qsmmu;
623
624 if (!data)
625 return ERR_PTR(-EINVAL);
626
627 if (np && of_device_is_compatible(np, "qcom,adreno-smmu"))
628 impl = data->adreno_impl;
629 else
630 impl = data->impl;
631
632 if (!impl)
633 return smmu;
634
635 /* Check to make sure qcom_scm has finished probing */
636 if (!qcom_scm_is_available())
637 return ERR_PTR(dev_err_probe(smmu->dev, -EPROBE_DEFER,
638 "qcom_scm not ready\n"));
639
640 qsmmu = devm_krealloc(smmu->dev, smmu, sizeof(*qsmmu), GFP_KERNEL);
641 if (!qsmmu)
642 return ERR_PTR(-ENOMEM);
643
644 qsmmu->smmu.impl = impl;
645 qsmmu->data = data;
646
647 return &qsmmu->smmu;
648 }
649
650 /* Implementation Defined Register Space 0 register offsets */
651 static const u32 qcom_smmu_impl0_reg_offset[] = {
652 [QCOM_SMMU_TBU_PWR_STATUS] = 0x2204,
653 [QCOM_SMMU_STATS_SYNC_INV_TBU_ACK] = 0x25dc,
654 [QCOM_SMMU_MMU2QSS_AND_SAFE_WAIT_CNTR] = 0x2670,
655 };
656
657 static const struct qcom_smmu_config qcom_smmu_impl0_cfg = {
658 .reg_offset = qcom_smmu_impl0_reg_offset,
659 };
660
661 /*
662 * It is not yet possible to use MDP SMMU with the bypass quirk on the msm8996,
663 * there are not enough context banks.
664 */
665 static const struct qcom_smmu_match_data msm8996_smmu_data = {
666 .impl = NULL,
667 .adreno_impl = &qcom_adreno_smmu_v2_impl,
668 };
669
670 static const struct qcom_smmu_match_data qcom_smmu_v2_data = {
671 .impl = &qcom_smmu_v2_impl,
672 .adreno_impl = &qcom_adreno_smmu_v2_impl,
673 };
674
675 static const struct qcom_smmu_match_data sdm845_smmu_500_data = {
676 .impl = &sdm845_smmu_500_impl,
677 /*
678 * No need for adreno impl here. On sdm845 the Adreno SMMU is handled
679 * by the separate sdm845-smmu-v2 device.
680 */
681 /* Also no debug configuration. */
682 };
683
684 static const struct qcom_smmu_match_data qcom_smmu_500_impl0_data = {
685 .impl = &qcom_smmu_500_impl,
686 .adreno_impl = &qcom_adreno_smmu_500_impl,
687 .cfg = &qcom_smmu_impl0_cfg,
688 .client_match = qcom_smmu_actlr_client_of_match,
689 };
690
691 /*
692 * Do not add any more qcom,SOC-smmu-500 entries to this list, unless they need
693 * special handling and can not be covered by the qcom,smmu-500 entry.
694 */
695 static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = {
696 { .compatible = "qcom,msm8996-smmu-v2", .data = &msm8996_smmu_data },
697 { .compatible = "qcom,msm8998-smmu-v2", .data = &qcom_smmu_v2_data },
698 { .compatible = "qcom,qcm2290-smmu-500", .data = &qcom_smmu_500_impl0_data },
699 { .compatible = "qcom,qdu1000-smmu-500", .data = &qcom_smmu_500_impl0_data },
700 { .compatible = "qcom,sc7180-smmu-500", .data = &qcom_smmu_500_impl0_data },
701 { .compatible = "qcom,sc7180-smmu-v2", .data = &qcom_smmu_v2_data },
702 { .compatible = "qcom,sc7280-smmu-500", .data = &qcom_smmu_500_impl0_data },
703 { .compatible = "qcom,sc8180x-smmu-500", .data = &qcom_smmu_500_impl0_data },
704 { .compatible = "qcom,sc8280xp-smmu-500", .data = &qcom_smmu_500_impl0_data },
705 { .compatible = "qcom,sdm630-smmu-v2", .data = &qcom_smmu_v2_data },
706 { .compatible = "qcom,sdm670-smmu-v2", .data = &qcom_smmu_v2_data },
707 { .compatible = "qcom,sdm845-smmu-v2", .data = &qcom_smmu_v2_data },
708 { .compatible = "qcom,sdm845-smmu-500", .data = &sdm845_smmu_500_data },
709 { .compatible = "qcom,sm6115-smmu-500", .data = &qcom_smmu_500_impl0_data},
710 { .compatible = "qcom,sm6125-smmu-500", .data = &qcom_smmu_500_impl0_data },
711 { .compatible = "qcom,sm6350-smmu-v2", .data = &qcom_smmu_v2_data },
712 { .compatible = "qcom,sm6350-smmu-500", .data = &qcom_smmu_500_impl0_data },
713 { .compatible = "qcom,sm6375-smmu-v2", .data = &qcom_smmu_v2_data },
714 { .compatible = "qcom,sm6375-smmu-500", .data = &qcom_smmu_500_impl0_data },
715 { .compatible = "qcom,sm7150-smmu-v2", .data = &qcom_smmu_v2_data },
716 { .compatible = "qcom,sm8150-smmu-500", .data = &qcom_smmu_500_impl0_data },
717 { .compatible = "qcom,sm8250-smmu-500", .data = &qcom_smmu_500_impl0_data },
718 { .compatible = "qcom,sm8350-smmu-500", .data = &qcom_smmu_500_impl0_data },
719 { .compatible = "qcom,sm8450-smmu-500", .data = &qcom_smmu_500_impl0_data },
720 { .compatible = "qcom,smmu-500", .data = &qcom_smmu_500_impl0_data },
721 { }
722 };
723
724 #ifdef CONFIG_ACPI
725 static struct acpi_platform_list qcom_acpi_platlist[] = {
726 { "LENOVO", "CB-01 ", 0x8180, ACPI_SIG_IORT, equal, "QCOM SMMU" },
727 { "QCOM ", "QCOMEDK2", 0x8180, ACPI_SIG_IORT, equal, "QCOM SMMU" },
728 { }
729 };
730 #endif
731
qcom_smmu_tbu_probe(struct platform_device * pdev)732 static int qcom_smmu_tbu_probe(struct platform_device *pdev)
733 {
734 struct device *dev = &pdev->dev;
735 int ret;
736
737 if (IS_ENABLED(CONFIG_ARM_SMMU_QCOM_DEBUG)) {
738 ret = qcom_tbu_probe(pdev);
739 if (ret)
740 return ret;
741 }
742
743 if (dev->pm_domain) {
744 pm_runtime_set_active(dev);
745 pm_runtime_enable(dev);
746 }
747
748 return 0;
749 }
750
751 static const struct of_device_id qcom_smmu_tbu_of_match[] = {
752 { .compatible = "qcom,sc7280-tbu" },
753 { .compatible = "qcom,sdm845-tbu" },
754 { }
755 };
756
757 static struct platform_driver qcom_smmu_tbu_driver = {
758 .driver = {
759 .name = "qcom_tbu",
760 .of_match_table = qcom_smmu_tbu_of_match,
761 },
762 .probe = qcom_smmu_tbu_probe,
763 };
764
qcom_smmu_impl_init(struct arm_smmu_device * smmu)765 struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
766 {
767 const struct device_node *np = smmu->dev->of_node;
768 const struct of_device_id *match;
769 static u8 tbu_registered;
770
771 if (!tbu_registered++)
772 platform_driver_register(&qcom_smmu_tbu_driver);
773
774 #ifdef CONFIG_ACPI
775 if (np == NULL) {
776 /* Match platform for ACPI boot */
777 if (acpi_match_platform_list(qcom_acpi_platlist) >= 0)
778 return qcom_smmu_create(smmu, &qcom_smmu_500_impl0_data);
779 }
780 #endif
781
782 match = of_match_node(qcom_smmu_impl_of_match, np);
783 if (match)
784 return qcom_smmu_create(smmu, match->data);
785
786 /*
787 * If you hit this WARN_ON() you are missing an entry in the
788 * qcom_smmu_impl_of_match[] table, and GPU per-process page-
789 * tables will be broken.
790 */
791 WARN(of_device_is_compatible(np, "qcom,adreno-smmu"),
792 "Missing qcom_smmu_impl_of_match entry for: %s",
793 dev_name(smmu->dev));
794
795 return smmu;
796 }
797