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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright(C) 2015 Linaro Limited. All rights reserved.
4 * Author: Mathieu Poirier <mathieu.poirier@linaro.org>
5 */
6
7#include <linux/pid_namespace.h>
8#include <linux/pm_runtime.h>
9#include <linux/sysfs.h>
10#include "coresight-etm.h"
11#include "coresight-priv.h"
12
13static ssize_t nr_addr_cmp_show(struct device *dev,
14 struct device_attribute *attr, char *buf)
15{
16 unsigned long val;
17 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
18
19 val = drvdata->nr_addr_cmp;
20 return sprintf(buf, "%#lx\n", val);
21}
22static DEVICE_ATTR_RO(nr_addr_cmp);
23
24static ssize_t nr_cntr_show(struct device *dev,
25 struct device_attribute *attr, char *buf)
26{ unsigned long val;
27 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
28
29 val = drvdata->nr_cntr;
30 return sprintf(buf, "%#lx\n", val);
31}
32static DEVICE_ATTR_RO(nr_cntr);
33
34static ssize_t nr_ctxid_cmp_show(struct device *dev,
35 struct device_attribute *attr, char *buf)
36{
37 unsigned long val;
38 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
39
40 val = drvdata->nr_ctxid_cmp;
41 return sprintf(buf, "%#lx\n", val);
42}
43static DEVICE_ATTR_RO(nr_ctxid_cmp);
44
45static ssize_t etmsr_show(struct device *dev,
46 struct device_attribute *attr, char *buf)
47{
48 unsigned long flags, val;
49 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
50
51 pm_runtime_get_sync(dev->parent);
52 spin_lock_irqsave(&drvdata->spinlock, flags);
53 CS_UNLOCK(drvdata->base);
54
55 val = etm_readl(drvdata, ETMSR);
56
57 CS_LOCK(drvdata->base);
58 spin_unlock_irqrestore(&drvdata->spinlock, flags);
59 pm_runtime_put(dev->parent);
60
61 return sprintf(buf, "%#lx\n", val);
62}
63static DEVICE_ATTR_RO(etmsr);
64
65static ssize_t reset_store(struct device *dev,
66 struct device_attribute *attr,
67 const char *buf, size_t size)
68{
69 int i, ret;
70 unsigned long val;
71 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
72 struct etm_config *config = &drvdata->config;
73
74 ret = kstrtoul(buf, 16, &val);
75 if (ret)
76 return ret;
77
78 if (val) {
79 spin_lock(&drvdata->spinlock);
80 memset(config, 0, sizeof(struct etm_config));
81 config->mode = ETM_MODE_EXCLUDE;
82 config->trigger_event = ETM_DEFAULT_EVENT_VAL;
83 for (i = 0; i < drvdata->nr_addr_cmp; i++) {
84 config->addr_type[i] = ETM_ADDR_TYPE_NONE;
85 }
86
87 etm_set_default(config);
88 etm_release_trace_id(drvdata);
89 spin_unlock(&drvdata->spinlock);
90 }
91
92 return size;
93}
94static DEVICE_ATTR_WO(reset);
95
96static ssize_t mode_show(struct device *dev,
97 struct device_attribute *attr, char *buf)
98{
99 unsigned long val;
100 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
101 struct etm_config *config = &drvdata->config;
102
103 val = config->mode;
104 return sprintf(buf, "%#lx\n", val);
105}
106
107static ssize_t mode_store(struct device *dev,
108 struct device_attribute *attr,
109 const char *buf, size_t size)
110{
111 int ret;
112 unsigned long val;
113 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
114 struct etm_config *config = &drvdata->config;
115
116 ret = kstrtoul(buf, 16, &val);
117 if (ret)
118 return ret;
119
120 spin_lock(&drvdata->spinlock);
121 config->mode = val & ETM_MODE_ALL;
122
123 if (config->mode & ETM_MODE_EXCLUDE)
124 config->enable_ctrl1 |= ETMTECR1_INC_EXC;
125 else
126 config->enable_ctrl1 &= ~ETMTECR1_INC_EXC;
127
128 if (config->mode & ETM_MODE_CYCACC)
129 config->ctrl |= ETMCR_CYC_ACC;
130 else
131 config->ctrl &= ~ETMCR_CYC_ACC;
132
133 if (config->mode & ETM_MODE_STALL) {
134 if (!(drvdata->etmccr & ETMCCR_FIFOFULL)) {
135 dev_warn(dev, "stall mode not supported\n");
136 ret = -EINVAL;
137 goto err_unlock;
138 }
139 config->ctrl |= ETMCR_STALL_MODE;
140 } else
141 config->ctrl &= ~ETMCR_STALL_MODE;
142
143 if (config->mode & ETM_MODE_TIMESTAMP) {
144 if (!(drvdata->etmccer & ETMCCER_TIMESTAMP)) {
145 dev_warn(dev, "timestamp not supported\n");
146 ret = -EINVAL;
147 goto err_unlock;
148 }
149 config->ctrl |= ETMCR_TIMESTAMP_EN;
150 } else
151 config->ctrl &= ~ETMCR_TIMESTAMP_EN;
152
153 if (config->mode & ETM_MODE_CTXID)
154 config->ctrl |= ETMCR_CTXID_SIZE;
155 else
156 config->ctrl &= ~ETMCR_CTXID_SIZE;
157
158 if (config->mode & ETM_MODE_BBROAD)
159 config->ctrl |= ETMCR_BRANCH_BROADCAST;
160 else
161 config->ctrl &= ~ETMCR_BRANCH_BROADCAST;
162
163 if (config->mode & ETM_MODE_RET_STACK)
164 config->ctrl |= ETMCR_RETURN_STACK;
165 else
166 config->ctrl &= ~ETMCR_RETURN_STACK;
167
168 if (config->mode & (ETM_MODE_EXCL_KERN | ETM_MODE_EXCL_USER))
169 etm_config_trace_mode(config);
170
171 spin_unlock(&drvdata->spinlock);
172
173 return size;
174
175err_unlock:
176 spin_unlock(&drvdata->spinlock);
177 return ret;
178}
179static DEVICE_ATTR_RW(mode);
180
181static ssize_t trigger_event_show(struct device *dev,
182 struct device_attribute *attr, char *buf)
183{
184 unsigned long val;
185 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
186 struct etm_config *config = &drvdata->config;
187
188 val = config->trigger_event;
189 return sprintf(buf, "%#lx\n", val);
190}
191
192static ssize_t trigger_event_store(struct device *dev,
193 struct device_attribute *attr,
194 const char *buf, size_t size)
195{
196 int ret;
197 unsigned long val;
198 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
199 struct etm_config *config = &drvdata->config;
200
201 ret = kstrtoul(buf, 16, &val);
202 if (ret)
203 return ret;
204
205 config->trigger_event = val & ETM_EVENT_MASK;
206
207 return size;
208}
209static DEVICE_ATTR_RW(trigger_event);
210
211static ssize_t enable_event_show(struct device *dev,
212 struct device_attribute *attr, char *buf)
213{
214 unsigned long val;
215 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
216 struct etm_config *config = &drvdata->config;
217
218 val = config->enable_event;
219 return sprintf(buf, "%#lx\n", val);
220}
221
222static ssize_t enable_event_store(struct device *dev,
223 struct device_attribute *attr,
224 const char *buf, size_t size)
225{
226 int ret;
227 unsigned long val;
228 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
229 struct etm_config *config = &drvdata->config;
230
231 ret = kstrtoul(buf, 16, &val);
232 if (ret)
233 return ret;
234
235 config->enable_event = val & ETM_EVENT_MASK;
236
237 return size;
238}
239static DEVICE_ATTR_RW(enable_event);
240
241static ssize_t fifofull_level_show(struct device *dev,
242 struct device_attribute *attr, char *buf)
243{
244 unsigned long val;
245 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
246 struct etm_config *config = &drvdata->config;
247
248 val = config->fifofull_level;
249 return sprintf(buf, "%#lx\n", val);
250}
251
252static ssize_t fifofull_level_store(struct device *dev,
253 struct device_attribute *attr,
254 const char *buf, size_t size)
255{
256 int ret;
257 unsigned long val;
258 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
259 struct etm_config *config = &drvdata->config;
260
261 ret = kstrtoul(buf, 16, &val);
262 if (ret)
263 return ret;
264
265 config->fifofull_level = val;
266
267 return size;
268}
269static DEVICE_ATTR_RW(fifofull_level);
270
271static ssize_t addr_idx_show(struct device *dev,
272 struct device_attribute *attr, char *buf)
273{
274 unsigned long val;
275 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
276 struct etm_config *config = &drvdata->config;
277
278 val = config->addr_idx;
279 return sprintf(buf, "%#lx\n", val);
280}
281
282static ssize_t addr_idx_store(struct device *dev,
283 struct device_attribute *attr,
284 const char *buf, size_t size)
285{
286 int ret;
287 unsigned long val;
288 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
289 struct etm_config *config = &drvdata->config;
290
291 ret = kstrtoul(buf, 16, &val);
292 if (ret)
293 return ret;
294
295 if (val >= drvdata->nr_addr_cmp)
296 return -EINVAL;
297
298 /*
299 * Use spinlock to ensure index doesn't change while it gets
300 * dereferenced multiple times within a spinlock block elsewhere.
301 */
302 spin_lock(&drvdata->spinlock);
303 config->addr_idx = val;
304 spin_unlock(&drvdata->spinlock);
305
306 return size;
307}
308static DEVICE_ATTR_RW(addr_idx);
309
310static ssize_t addr_single_show(struct device *dev,
311 struct device_attribute *attr, char *buf)
312{
313 u8 idx;
314 unsigned long val;
315 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
316 struct etm_config *config = &drvdata->config;
317
318 spin_lock(&drvdata->spinlock);
319 idx = config->addr_idx;
320 if (!(config->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
321 config->addr_type[idx] == ETM_ADDR_TYPE_SINGLE)) {
322 spin_unlock(&drvdata->spinlock);
323 return -EINVAL;
324 }
325
326 val = config->addr_val[idx];
327 spin_unlock(&drvdata->spinlock);
328
329 return sprintf(buf, "%#lx\n", val);
330}
331
332static ssize_t addr_single_store(struct device *dev,
333 struct device_attribute *attr,
334 const char *buf, size_t size)
335{
336 u8 idx;
337 int ret;
338 unsigned long val;
339 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
340 struct etm_config *config = &drvdata->config;
341
342 ret = kstrtoul(buf, 16, &val);
343 if (ret)
344 return ret;
345
346 spin_lock(&drvdata->spinlock);
347 idx = config->addr_idx;
348 if (!(config->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
349 config->addr_type[idx] == ETM_ADDR_TYPE_SINGLE)) {
350 spin_unlock(&drvdata->spinlock);
351 return -EINVAL;
352 }
353
354 config->addr_val[idx] = val;
355 config->addr_type[idx] = ETM_ADDR_TYPE_SINGLE;
356 spin_unlock(&drvdata->spinlock);
357
358 return size;
359}
360static DEVICE_ATTR_RW(addr_single);
361
362static ssize_t addr_range_show(struct device *dev,
363 struct device_attribute *attr, char *buf)
364{
365 u8 idx;
366 unsigned long val1, val2;
367 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
368 struct etm_config *config = &drvdata->config;
369
370 spin_lock(&drvdata->spinlock);
371 idx = config->addr_idx;
372 if (idx % 2 != 0) {
373 spin_unlock(&drvdata->spinlock);
374 return -EPERM;
375 }
376 if (!((config->addr_type[idx] == ETM_ADDR_TYPE_NONE &&
377 config->addr_type[idx + 1] == ETM_ADDR_TYPE_NONE) ||
378 (config->addr_type[idx] == ETM_ADDR_TYPE_RANGE &&
379 config->addr_type[idx + 1] == ETM_ADDR_TYPE_RANGE))) {
380 spin_unlock(&drvdata->spinlock);
381 return -EPERM;
382 }
383
384 val1 = config->addr_val[idx];
385 val2 = config->addr_val[idx + 1];
386 spin_unlock(&drvdata->spinlock);
387
388 return sprintf(buf, "%#lx %#lx\n", val1, val2);
389}
390
391static ssize_t addr_range_store(struct device *dev,
392 struct device_attribute *attr,
393 const char *buf, size_t size)
394{
395 u8 idx;
396 unsigned long val1, val2;
397 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
398 struct etm_config *config = &drvdata->config;
399
400 if (sscanf(buf, "%lx %lx", &val1, &val2) != 2)
401 return -EINVAL;
402 /* Lower address comparator cannot have a higher address value */
403 if (val1 > val2)
404 return -EINVAL;
405
406 spin_lock(&drvdata->spinlock);
407 idx = config->addr_idx;
408 if (idx % 2 != 0) {
409 spin_unlock(&drvdata->spinlock);
410 return -EPERM;
411 }
412 if (!((config->addr_type[idx] == ETM_ADDR_TYPE_NONE &&
413 config->addr_type[idx + 1] == ETM_ADDR_TYPE_NONE) ||
414 (config->addr_type[idx] == ETM_ADDR_TYPE_RANGE &&
415 config->addr_type[idx + 1] == ETM_ADDR_TYPE_RANGE))) {
416 spin_unlock(&drvdata->spinlock);
417 return -EPERM;
418 }
419
420 config->addr_val[idx] = val1;
421 config->addr_type[idx] = ETM_ADDR_TYPE_RANGE;
422 config->addr_val[idx + 1] = val2;
423 config->addr_type[idx + 1] = ETM_ADDR_TYPE_RANGE;
424 config->enable_ctrl1 |= (1 << (idx/2));
425 spin_unlock(&drvdata->spinlock);
426
427 return size;
428}
429static DEVICE_ATTR_RW(addr_range);
430
431static ssize_t addr_start_show(struct device *dev,
432 struct device_attribute *attr, char *buf)
433{
434 u8 idx;
435 unsigned long val;
436 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
437 struct etm_config *config = &drvdata->config;
438
439 spin_lock(&drvdata->spinlock);
440 idx = config->addr_idx;
441 if (!(config->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
442 config->addr_type[idx] == ETM_ADDR_TYPE_START)) {
443 spin_unlock(&drvdata->spinlock);
444 return -EPERM;
445 }
446
447 val = config->addr_val[idx];
448 spin_unlock(&drvdata->spinlock);
449
450 return sprintf(buf, "%#lx\n", val);
451}
452
453static ssize_t addr_start_store(struct device *dev,
454 struct device_attribute *attr,
455 const char *buf, size_t size)
456{
457 u8 idx;
458 int ret;
459 unsigned long val;
460 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
461 struct etm_config *config = &drvdata->config;
462
463 ret = kstrtoul(buf, 16, &val);
464 if (ret)
465 return ret;
466
467 spin_lock(&drvdata->spinlock);
468 idx = config->addr_idx;
469 if (!(config->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
470 config->addr_type[idx] == ETM_ADDR_TYPE_START)) {
471 spin_unlock(&drvdata->spinlock);
472 return -EPERM;
473 }
474
475 config->addr_val[idx] = val;
476 config->addr_type[idx] = ETM_ADDR_TYPE_START;
477 config->startstop_ctrl |= (1 << idx);
478 config->enable_ctrl1 |= ETMTECR1_START_STOP;
479 spin_unlock(&drvdata->spinlock);
480
481 return size;
482}
483static DEVICE_ATTR_RW(addr_start);
484
485static ssize_t addr_stop_show(struct device *dev,
486 struct device_attribute *attr, char *buf)
487{
488 u8 idx;
489 unsigned long val;
490 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
491 struct etm_config *config = &drvdata->config;
492
493 spin_lock(&drvdata->spinlock);
494 idx = config->addr_idx;
495 if (!(config->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
496 config->addr_type[idx] == ETM_ADDR_TYPE_STOP)) {
497 spin_unlock(&drvdata->spinlock);
498 return -EPERM;
499 }
500
501 val = config->addr_val[idx];
502 spin_unlock(&drvdata->spinlock);
503
504 return sprintf(buf, "%#lx\n", val);
505}
506
507static ssize_t addr_stop_store(struct device *dev,
508 struct device_attribute *attr,
509 const char *buf, size_t size)
510{
511 u8 idx;
512 int ret;
513 unsigned long val;
514 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
515 struct etm_config *config = &drvdata->config;
516
517 ret = kstrtoul(buf, 16, &val);
518 if (ret)
519 return ret;
520
521 spin_lock(&drvdata->spinlock);
522 idx = config->addr_idx;
523 if (!(config->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
524 config->addr_type[idx] == ETM_ADDR_TYPE_STOP)) {
525 spin_unlock(&drvdata->spinlock);
526 return -EPERM;
527 }
528
529 config->addr_val[idx] = val;
530 config->addr_type[idx] = ETM_ADDR_TYPE_STOP;
531 config->startstop_ctrl |= (1 << (idx + 16));
532 config->enable_ctrl1 |= ETMTECR1_START_STOP;
533 spin_unlock(&drvdata->spinlock);
534
535 return size;
536}
537static DEVICE_ATTR_RW(addr_stop);
538
539static ssize_t addr_acctype_show(struct device *dev,
540 struct device_attribute *attr, char *buf)
541{
542 unsigned long val;
543 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
544 struct etm_config *config = &drvdata->config;
545
546 spin_lock(&drvdata->spinlock);
547 val = config->addr_acctype[config->addr_idx];
548 spin_unlock(&drvdata->spinlock);
549
550 return sprintf(buf, "%#lx\n", val);
551}
552
553static ssize_t addr_acctype_store(struct device *dev,
554 struct device_attribute *attr,
555 const char *buf, size_t size)
556{
557 int ret;
558 unsigned long val;
559 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
560 struct etm_config *config = &drvdata->config;
561
562 ret = kstrtoul(buf, 16, &val);
563 if (ret)
564 return ret;
565
566 spin_lock(&drvdata->spinlock);
567 config->addr_acctype[config->addr_idx] = val;
568 spin_unlock(&drvdata->spinlock);
569
570 return size;
571}
572static DEVICE_ATTR_RW(addr_acctype);
573
574static ssize_t cntr_idx_show(struct device *dev,
575 struct device_attribute *attr, char *buf)
576{
577 unsigned long val;
578 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
579 struct etm_config *config = &drvdata->config;
580
581 val = config->cntr_idx;
582 return sprintf(buf, "%#lx\n", val);
583}
584
585static ssize_t cntr_idx_store(struct device *dev,
586 struct device_attribute *attr,
587 const char *buf, size_t size)
588{
589 int ret;
590 unsigned long val;
591 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
592 struct etm_config *config = &drvdata->config;
593
594 ret = kstrtoul(buf, 16, &val);
595 if (ret)
596 return ret;
597
598 if (val >= drvdata->nr_cntr)
599 return -EINVAL;
600 /*
601 * Use spinlock to ensure index doesn't change while it gets
602 * dereferenced multiple times within a spinlock block elsewhere.
603 */
604 spin_lock(&drvdata->spinlock);
605 config->cntr_idx = val;
606 spin_unlock(&drvdata->spinlock);
607
608 return size;
609}
610static DEVICE_ATTR_RW(cntr_idx);
611
612static ssize_t cntr_rld_val_show(struct device *dev,
613 struct device_attribute *attr, char *buf)
614{
615 unsigned long val;
616 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
617 struct etm_config *config = &drvdata->config;
618
619 spin_lock(&drvdata->spinlock);
620 val = config->cntr_rld_val[config->cntr_idx];
621 spin_unlock(&drvdata->spinlock);
622
623 return sprintf(buf, "%#lx\n", val);
624}
625
626static ssize_t cntr_rld_val_store(struct device *dev,
627 struct device_attribute *attr,
628 const char *buf, size_t size)
629{
630 int ret;
631 unsigned long val;
632 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
633 struct etm_config *config = &drvdata->config;
634
635 ret = kstrtoul(buf, 16, &val);
636 if (ret)
637 return ret;
638
639 spin_lock(&drvdata->spinlock);
640 config->cntr_rld_val[config->cntr_idx] = val;
641 spin_unlock(&drvdata->spinlock);
642
643 return size;
644}
645static DEVICE_ATTR_RW(cntr_rld_val);
646
647static ssize_t cntr_event_show(struct device *dev,
648 struct device_attribute *attr, char *buf)
649{
650 unsigned long val;
651 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
652 struct etm_config *config = &drvdata->config;
653
654 spin_lock(&drvdata->spinlock);
655 val = config->cntr_event[config->cntr_idx];
656 spin_unlock(&drvdata->spinlock);
657
658 return sprintf(buf, "%#lx\n", val);
659}
660
661static ssize_t cntr_event_store(struct device *dev,
662 struct device_attribute *attr,
663 const char *buf, size_t size)
664{
665 int ret;
666 unsigned long val;
667 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
668 struct etm_config *config = &drvdata->config;
669
670 ret = kstrtoul(buf, 16, &val);
671 if (ret)
672 return ret;
673
674 spin_lock(&drvdata->spinlock);
675 config->cntr_event[config->cntr_idx] = val & ETM_EVENT_MASK;
676 spin_unlock(&drvdata->spinlock);
677
678 return size;
679}
680static DEVICE_ATTR_RW(cntr_event);
681
682static ssize_t cntr_rld_event_show(struct device *dev,
683 struct device_attribute *attr, char *buf)
684{
685 unsigned long val;
686 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
687 struct etm_config *config = &drvdata->config;
688
689 spin_lock(&drvdata->spinlock);
690 val = config->cntr_rld_event[config->cntr_idx];
691 spin_unlock(&drvdata->spinlock);
692
693 return sprintf(buf, "%#lx\n", val);
694}
695
696static ssize_t cntr_rld_event_store(struct device *dev,
697 struct device_attribute *attr,
698 const char *buf, size_t size)
699{
700 int ret;
701 unsigned long val;
702 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
703 struct etm_config *config = &drvdata->config;
704
705 ret = kstrtoul(buf, 16, &val);
706 if (ret)
707 return ret;
708
709 spin_lock(&drvdata->spinlock);
710 config->cntr_rld_event[config->cntr_idx] = val & ETM_EVENT_MASK;
711 spin_unlock(&drvdata->spinlock);
712
713 return size;
714}
715static DEVICE_ATTR_RW(cntr_rld_event);
716
717static ssize_t cntr_val_show(struct device *dev,
718 struct device_attribute *attr, char *buf)
719{
720 int i, ret = 0;
721 u32 val;
722 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
723 struct etm_config *config = &drvdata->config;
724
725 if (!local_read(&drvdata->mode)) {
726 spin_lock(&drvdata->spinlock);
727 for (i = 0; i < drvdata->nr_cntr; i++)
728 ret += sprintf(buf, "counter %d: %x\n",
729 i, config->cntr_val[i]);
730 spin_unlock(&drvdata->spinlock);
731 return ret;
732 }
733
734 for (i = 0; i < drvdata->nr_cntr; i++) {
735 val = etm_readl(drvdata, ETMCNTVRn(i));
736 ret += sprintf(buf, "counter %d: %x\n", i, val);
737 }
738
739 return ret;
740}
741
742static ssize_t cntr_val_store(struct device *dev,
743 struct device_attribute *attr,
744 const char *buf, size_t size)
745{
746 int ret;
747 unsigned long val;
748 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
749 struct etm_config *config = &drvdata->config;
750
751 ret = kstrtoul(buf, 16, &val);
752 if (ret)
753 return ret;
754
755 spin_lock(&drvdata->spinlock);
756 config->cntr_val[config->cntr_idx] = val;
757 spin_unlock(&drvdata->spinlock);
758
759 return size;
760}
761static DEVICE_ATTR_RW(cntr_val);
762
763static ssize_t seq_12_event_show(struct device *dev,
764 struct device_attribute *attr, char *buf)
765{
766 unsigned long val;
767 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
768 struct etm_config *config = &drvdata->config;
769
770 val = config->seq_12_event;
771 return sprintf(buf, "%#lx\n", val);
772}
773
774static ssize_t seq_12_event_store(struct device *dev,
775 struct device_attribute *attr,
776 const char *buf, size_t size)
777{
778 int ret;
779 unsigned long val;
780 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
781 struct etm_config *config = &drvdata->config;
782
783 ret = kstrtoul(buf, 16, &val);
784 if (ret)
785 return ret;
786
787 config->seq_12_event = val & ETM_EVENT_MASK;
788 return size;
789}
790static DEVICE_ATTR_RW(seq_12_event);
791
792static ssize_t seq_21_event_show(struct device *dev,
793 struct device_attribute *attr, char *buf)
794{
795 unsigned long val;
796 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
797 struct etm_config *config = &drvdata->config;
798
799 val = config->seq_21_event;
800 return sprintf(buf, "%#lx\n", val);
801}
802
803static ssize_t seq_21_event_store(struct device *dev,
804 struct device_attribute *attr,
805 const char *buf, size_t size)
806{
807 int ret;
808 unsigned long val;
809 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
810 struct etm_config *config = &drvdata->config;
811
812 ret = kstrtoul(buf, 16, &val);
813 if (ret)
814 return ret;
815
816 config->seq_21_event = val & ETM_EVENT_MASK;
817 return size;
818}
819static DEVICE_ATTR_RW(seq_21_event);
820
821static ssize_t seq_23_event_show(struct device *dev,
822 struct device_attribute *attr, char *buf)
823{
824 unsigned long val;
825 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
826 struct etm_config *config = &drvdata->config;
827
828 val = config->seq_23_event;
829 return sprintf(buf, "%#lx\n", val);
830}
831
832static ssize_t seq_23_event_store(struct device *dev,
833 struct device_attribute *attr,
834 const char *buf, size_t size)
835{
836 int ret;
837 unsigned long val;
838 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
839 struct etm_config *config = &drvdata->config;
840
841 ret = kstrtoul(buf, 16, &val);
842 if (ret)
843 return ret;
844
845 config->seq_23_event = val & ETM_EVENT_MASK;
846 return size;
847}
848static DEVICE_ATTR_RW(seq_23_event);
849
850static ssize_t seq_31_event_show(struct device *dev,
851 struct device_attribute *attr, char *buf)
852{
853 unsigned long val;
854 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
855 struct etm_config *config = &drvdata->config;
856
857 val = config->seq_31_event;
858 return sprintf(buf, "%#lx\n", val);
859}
860
861static ssize_t seq_31_event_store(struct device *dev,
862 struct device_attribute *attr,
863 const char *buf, size_t size)
864{
865 int ret;
866 unsigned long val;
867 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
868 struct etm_config *config = &drvdata->config;
869
870 ret = kstrtoul(buf, 16, &val);
871 if (ret)
872 return ret;
873
874 config->seq_31_event = val & ETM_EVENT_MASK;
875 return size;
876}
877static DEVICE_ATTR_RW(seq_31_event);
878
879static ssize_t seq_32_event_show(struct device *dev,
880 struct device_attribute *attr, char *buf)
881{
882 unsigned long val;
883 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
884 struct etm_config *config = &drvdata->config;
885
886 val = config->seq_32_event;
887 return sprintf(buf, "%#lx\n", val);
888}
889
890static ssize_t seq_32_event_store(struct device *dev,
891 struct device_attribute *attr,
892 const char *buf, size_t size)
893{
894 int ret;
895 unsigned long val;
896 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
897 struct etm_config *config = &drvdata->config;
898
899 ret = kstrtoul(buf, 16, &val);
900 if (ret)
901 return ret;
902
903 config->seq_32_event = val & ETM_EVENT_MASK;
904 return size;
905}
906static DEVICE_ATTR_RW(seq_32_event);
907
908static ssize_t seq_13_event_show(struct device *dev,
909 struct device_attribute *attr, char *buf)
910{
911 unsigned long val;
912 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
913 struct etm_config *config = &drvdata->config;
914
915 val = config->seq_13_event;
916 return sprintf(buf, "%#lx\n", val);
917}
918
919static ssize_t seq_13_event_store(struct device *dev,
920 struct device_attribute *attr,
921 const char *buf, size_t size)
922{
923 int ret;
924 unsigned long val;
925 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
926 struct etm_config *config = &drvdata->config;
927
928 ret = kstrtoul(buf, 16, &val);
929 if (ret)
930 return ret;
931
932 config->seq_13_event = val & ETM_EVENT_MASK;
933 return size;
934}
935static DEVICE_ATTR_RW(seq_13_event);
936
937static ssize_t seq_curr_state_show(struct device *dev,
938 struct device_attribute *attr, char *buf)
939{
940 unsigned long val, flags;
941 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
942 struct etm_config *config = &drvdata->config;
943
944 if (!local_read(&drvdata->mode)) {
945 val = config->seq_curr_state;
946 goto out;
947 }
948
949 pm_runtime_get_sync(dev->parent);
950 spin_lock_irqsave(&drvdata->spinlock, flags);
951
952 CS_UNLOCK(drvdata->base);
953 val = (etm_readl(drvdata, ETMSQR) & ETM_SQR_MASK);
954 CS_LOCK(drvdata->base);
955
956 spin_unlock_irqrestore(&drvdata->spinlock, flags);
957 pm_runtime_put(dev->parent);
958out:
959 return sprintf(buf, "%#lx\n", val);
960}
961
962static ssize_t seq_curr_state_store(struct device *dev,
963 struct device_attribute *attr,
964 const char *buf, size_t size)
965{
966 int ret;
967 unsigned long val;
968 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
969 struct etm_config *config = &drvdata->config;
970
971 ret = kstrtoul(buf, 16, &val);
972 if (ret)
973 return ret;
974
975 if (val > ETM_SEQ_STATE_MAX_VAL)
976 return -EINVAL;
977
978 config->seq_curr_state = val;
979
980 return size;
981}
982static DEVICE_ATTR_RW(seq_curr_state);
983
984static ssize_t ctxid_idx_show(struct device *dev,
985 struct device_attribute *attr, char *buf)
986{
987 unsigned long val;
988 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
989 struct etm_config *config = &drvdata->config;
990
991 val = config->ctxid_idx;
992 return sprintf(buf, "%#lx\n", val);
993}
994
995static ssize_t ctxid_idx_store(struct device *dev,
996 struct device_attribute *attr,
997 const char *buf, size_t size)
998{
999 int ret;
1000 unsigned long val;
1001 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1002 struct etm_config *config = &drvdata->config;
1003
1004 ret = kstrtoul(buf, 16, &val);
1005 if (ret)
1006 return ret;
1007
1008 if (val >= drvdata->nr_ctxid_cmp)
1009 return -EINVAL;
1010
1011 /*
1012 * Use spinlock to ensure index doesn't change while it gets
1013 * dereferenced multiple times within a spinlock block elsewhere.
1014 */
1015 spin_lock(&drvdata->spinlock);
1016 config->ctxid_idx = val;
1017 spin_unlock(&drvdata->spinlock);
1018
1019 return size;
1020}
1021static DEVICE_ATTR_RW(ctxid_idx);
1022
1023static ssize_t ctxid_pid_show(struct device *dev,
1024 struct device_attribute *attr, char *buf)
1025{
1026 unsigned long val;
1027 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1028 struct etm_config *config = &drvdata->config;
1029
1030 /*
1031 * Don't use contextID tracing if coming from a PID namespace. See
1032 * comment in ctxid_pid_store().
1033 */
1034 if (task_active_pid_ns(current) != &init_pid_ns)
1035 return -EINVAL;
1036
1037 spin_lock(&drvdata->spinlock);
1038 val = config->ctxid_pid[config->ctxid_idx];
1039 spin_unlock(&drvdata->spinlock);
1040
1041 return sprintf(buf, "%#lx\n", val);
1042}
1043
1044static ssize_t ctxid_pid_store(struct device *dev,
1045 struct device_attribute *attr,
1046 const char *buf, size_t size)
1047{
1048 int ret;
1049 unsigned long pid;
1050 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1051 struct etm_config *config = &drvdata->config;
1052
1053 /*
1054 * When contextID tracing is enabled the tracers will insert the
1055 * value found in the contextID register in the trace stream. But if
1056 * a process is in a namespace the PID of that process as seen from the
1057 * namespace won't be what the kernel sees, something that makes the
1058 * feature confusing and can potentially leak kernel only information.
1059 * As such refuse to use the feature if @current is not in the initial
1060 * PID namespace.
1061 */
1062 if (task_active_pid_ns(current) != &init_pid_ns)
1063 return -EINVAL;
1064
1065 ret = kstrtoul(buf, 16, &pid);
1066 if (ret)
1067 return ret;
1068
1069 spin_lock(&drvdata->spinlock);
1070 config->ctxid_pid[config->ctxid_idx] = pid;
1071 spin_unlock(&drvdata->spinlock);
1072
1073 return size;
1074}
1075static DEVICE_ATTR_RW(ctxid_pid);
1076
1077static ssize_t ctxid_mask_show(struct device *dev,
1078 struct device_attribute *attr, char *buf)
1079{
1080 unsigned long val;
1081 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1082 struct etm_config *config = &drvdata->config;
1083
1084 /*
1085 * Don't use contextID tracing if coming from a PID namespace. See
1086 * comment in ctxid_pid_store().
1087 */
1088 if (task_active_pid_ns(current) != &init_pid_ns)
1089 return -EINVAL;
1090
1091 val = config->ctxid_mask;
1092 return sprintf(buf, "%#lx\n", val);
1093}
1094
1095static ssize_t ctxid_mask_store(struct device *dev,
1096 struct device_attribute *attr,
1097 const char *buf, size_t size)
1098{
1099 int ret;
1100 unsigned long val;
1101 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1102 struct etm_config *config = &drvdata->config;
1103
1104 /*
1105 * Don't use contextID tracing if coming from a PID namespace. See
1106 * comment in ctxid_pid_store().
1107 */
1108 if (task_active_pid_ns(current) != &init_pid_ns)
1109 return -EINVAL;
1110
1111 ret = kstrtoul(buf, 16, &val);
1112 if (ret)
1113 return ret;
1114
1115 config->ctxid_mask = val;
1116 return size;
1117}
1118static DEVICE_ATTR_RW(ctxid_mask);
1119
1120static ssize_t sync_freq_show(struct device *dev,
1121 struct device_attribute *attr, char *buf)
1122{
1123 unsigned long val;
1124 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1125 struct etm_config *config = &drvdata->config;
1126
1127 val = config->sync_freq;
1128 return sprintf(buf, "%#lx\n", val);
1129}
1130
1131static ssize_t sync_freq_store(struct device *dev,
1132 struct device_attribute *attr,
1133 const char *buf, size_t size)
1134{
1135 int ret;
1136 unsigned long val;
1137 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1138 struct etm_config *config = &drvdata->config;
1139
1140 ret = kstrtoul(buf, 16, &val);
1141 if (ret)
1142 return ret;
1143
1144 config->sync_freq = val & ETM_SYNC_MASK;
1145 return size;
1146}
1147static DEVICE_ATTR_RW(sync_freq);
1148
1149static ssize_t timestamp_event_show(struct device *dev,
1150 struct device_attribute *attr, char *buf)
1151{
1152 unsigned long val;
1153 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1154 struct etm_config *config = &drvdata->config;
1155
1156 val = config->timestamp_event;
1157 return sprintf(buf, "%#lx\n", val);
1158}
1159
1160static ssize_t timestamp_event_store(struct device *dev,
1161 struct device_attribute *attr,
1162 const char *buf, size_t size)
1163{
1164 int ret;
1165 unsigned long val;
1166 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1167 struct etm_config *config = &drvdata->config;
1168
1169 ret = kstrtoul(buf, 16, &val);
1170 if (ret)
1171 return ret;
1172
1173 config->timestamp_event = val & ETM_EVENT_MASK;
1174 return size;
1175}
1176static DEVICE_ATTR_RW(timestamp_event);
1177
1178static ssize_t cpu_show(struct device *dev,
1179 struct device_attribute *attr, char *buf)
1180{
1181 int val;
1182 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1183
1184 val = drvdata->cpu;
1185 return scnprintf(buf, PAGE_SIZE, "%d\n", val);
1186
1187}
1188static DEVICE_ATTR_RO(cpu);
1189
1190static ssize_t traceid_show(struct device *dev,
1191 struct device_attribute *attr, char *buf)
1192{
1193 int trace_id;
1194 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1195
1196 trace_id = etm_read_alloc_trace_id(drvdata);
1197 if (trace_id < 0)
1198 return trace_id;
1199
1200 return sysfs_emit(buf, "%#x\n", trace_id);
1201}
1202static DEVICE_ATTR_RO(traceid);
1203
1204static struct attribute *coresight_etm_attrs[] = {
1205 &dev_attr_nr_addr_cmp.attr,
1206 &dev_attr_nr_cntr.attr,
1207 &dev_attr_nr_ctxid_cmp.attr,
1208 &dev_attr_etmsr.attr,
1209 &dev_attr_reset.attr,
1210 &dev_attr_mode.attr,
1211 &dev_attr_trigger_event.attr,
1212 &dev_attr_enable_event.attr,
1213 &dev_attr_fifofull_level.attr,
1214 &dev_attr_addr_idx.attr,
1215 &dev_attr_addr_single.attr,
1216 &dev_attr_addr_range.attr,
1217 &dev_attr_addr_start.attr,
1218 &dev_attr_addr_stop.attr,
1219 &dev_attr_addr_acctype.attr,
1220 &dev_attr_cntr_idx.attr,
1221 &dev_attr_cntr_rld_val.attr,
1222 &dev_attr_cntr_event.attr,
1223 &dev_attr_cntr_rld_event.attr,
1224 &dev_attr_cntr_val.attr,
1225 &dev_attr_seq_12_event.attr,
1226 &dev_attr_seq_21_event.attr,
1227 &dev_attr_seq_23_event.attr,
1228 &dev_attr_seq_31_event.attr,
1229 &dev_attr_seq_32_event.attr,
1230 &dev_attr_seq_13_event.attr,
1231 &dev_attr_seq_curr_state.attr,
1232 &dev_attr_ctxid_idx.attr,
1233 &dev_attr_ctxid_pid.attr,
1234 &dev_attr_ctxid_mask.attr,
1235 &dev_attr_sync_freq.attr,
1236 &dev_attr_timestamp_event.attr,
1237 &dev_attr_traceid.attr,
1238 &dev_attr_cpu.attr,
1239 NULL,
1240};
1241
1242static struct attribute *coresight_etm_mgmt_attrs[] = {
1243 coresight_simple_reg32(etmccr, ETMCCR),
1244 coresight_simple_reg32(etmccer, ETMCCER),
1245 coresight_simple_reg32(etmscr, ETMSCR),
1246 coresight_simple_reg32(etmidr, ETMIDR),
1247 coresight_simple_reg32(etmcr, ETMCR),
1248 coresight_simple_reg32(etmtraceidr, ETMTRACEIDR),
1249 coresight_simple_reg32(etmteevr, ETMTEEVR),
1250 coresight_simple_reg32(etmtssvr, ETMTSSCR),
1251 coresight_simple_reg32(etmtecr1, ETMTECR1),
1252 coresight_simple_reg32(etmtecr2, ETMTECR2),
1253 NULL,
1254};
1255
1256static const struct attribute_group coresight_etm_group = {
1257 .attrs = coresight_etm_attrs,
1258};
1259
1260static const struct attribute_group coresight_etm_mgmt_group = {
1261 .attrs = coresight_etm_mgmt_attrs,
1262 .name = "mgmt",
1263};
1264
1265const struct attribute_group *coresight_etm_groups[] = {
1266 &coresight_etm_group,
1267 &coresight_etm_mgmt_group,
1268 NULL,
1269};