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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
[linux-2.6-block.git] / drivers / coresight / coresight-etm3x.c
CommitLineData
a939fc5a
PP		 1/* Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
2 *
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 and
5 * only version 2 as published by the Free Software Foundation.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 */
12
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/init.h>
16#include <linux/types.h>
17#include <linux/device.h>
18#include <linux/io.h>
19#include <linux/err.h>
20#include <linux/fs.h>
21#include <linux/slab.h>
22#include <linux/delay.h>
23#include <linux/smp.h>
24#include <linux/sysfs.h>
25#include <linux/stat.h>
26#include <linux/clk.h>
27#include <linux/cpu.h>
28#include <linux/of.h>
29#include <linux/coresight.h>
30#include <linux/amba/bus.h>
31#include <linux/seq_file.h>
32#include <linux/uaccess.h>
33#include <asm/sections.h>
34
35#include "coresight-etm.h"
36
37#ifdef CONFIG_CORESIGHT_SOURCE_ETM_DEFAULT_ENABLE
38static int boot_enable = 1;
39#else
40static int boot_enable;
41#endif
42module_param_named(
43 boot_enable, boot_enable, int, S_IRUGO
44);
45
46/* The number of ETM/PTM currently registered */
47static int etm_count;
48static struct etm_drvdata *etmdrvdata[NR_CPUS];
49
50static inline void etm_writel(struct etm_drvdata *drvdata,
51 u32 val, u32 off)
52{
53 if (drvdata->use_cp14) {
54 if (etm_writel_cp14(off, val)) {
55 dev_err(drvdata->dev,
56 "invalid CP14 access to ETM reg: %#x", off);
57 }
58 } else {
59 writel_relaxed(val, drvdata->base + off);
60 }
61}
62
63static inline unsigned int etm_readl(struct etm_drvdata *drvdata, u32 off)
64{
65 u32 val;
66
67 if (drvdata->use_cp14) {
68 if (etm_readl_cp14(off, &val)) {
69 dev_err(drvdata->dev,
70 "invalid CP14 access to ETM reg: %#x", off);
71 }
72 } else {
73 val = readl_relaxed(drvdata->base + off);
74 }
75
76 return val;
77}
78
79/*
80 * Memory mapped writes to clear os lock are not supported on some processors
81 * and OS lock must be unlocked before any memory mapped access on such
82 * processors, otherwise memory mapped reads/writes will be invalid.
83 */
84static void etm_os_unlock(void *info)
85{
86 struct etm_drvdata *drvdata = (struct etm_drvdata *)info;
87 /* Writing any value to ETMOSLAR unlocks the trace registers */
88 etm_writel(drvdata, 0x0, ETMOSLAR);
89 isb();
90}
91
92static void etm_set_pwrdwn(struct etm_drvdata *drvdata)
93{
94 u32 etmcr;
95
96 /* Ensure pending cp14 accesses complete before setting pwrdwn */
97 mb();
98 isb();
99 etmcr = etm_readl(drvdata, ETMCR);
100 etmcr |= ETMCR_PWD_DWN;
101 etm_writel(drvdata, etmcr, ETMCR);
102}
103
104static void etm_clr_pwrdwn(struct etm_drvdata *drvdata)
105{
106 u32 etmcr;
107
108 etmcr = etm_readl(drvdata, ETMCR);
109 etmcr &= ~ETMCR_PWD_DWN;
110 etm_writel(drvdata, etmcr, ETMCR);
111 /* Ensure pwrup completes before subsequent cp14 accesses */
112 mb();
113 isb();
114}
115
116static void etm_set_pwrup(struct etm_drvdata *drvdata)
117{
118 u32 etmpdcr;
119
120 etmpdcr = readl_relaxed(drvdata->base + ETMPDCR);
121 etmpdcr |= ETMPDCR_PWD_UP;
122 writel_relaxed(etmpdcr, drvdata->base + ETMPDCR);
123 /* Ensure pwrup completes before subsequent cp14 accesses */
124 mb();
125 isb();
126}
127
128static void etm_clr_pwrup(struct etm_drvdata *drvdata)
129{
130 u32 etmpdcr;
131
132 /* Ensure pending cp14 accesses complete before clearing pwrup */
133 mb();
134 isb();
135 etmpdcr = readl_relaxed(drvdata->base + ETMPDCR);
136 etmpdcr &= ~ETMPDCR_PWD_UP;
137 writel_relaxed(etmpdcr, drvdata->base + ETMPDCR);
138}
139
140/**
141 * coresight_timeout_etm - loop until a bit has changed to a specific state.
142 * @drvdata: etm's private data structure.
143 * @offset: address of a register, starting from @addr.
144 * @position: the position of the bit of interest.
145 * @value: the value the bit should have.
146 *
147 * Basically the same as @coresight_timeout except for the register access
148 * method where we have to account for CP14 configurations.
149
150 * Return: 0 as soon as the bit has taken the desired state or -EAGAIN if
151 * TIMEOUT_US has elapsed, which ever happens first.
152 */
153
154static int coresight_timeout_etm(struct etm_drvdata *drvdata, u32 offset,
155 int position, int value)
156{
157 int i;
158 u32 val;
159
160 for (i = TIMEOUT_US; i > 0; i--) {
161 val = etm_readl(drvdata, offset);
162 /* Waiting on the bit to go from 0 to 1 */
163 if (value) {
164 if (val & BIT(position))
165 return 0;
166 /* Waiting on the bit to go from 1 to 0 */
167 } else {
168 if (!(val & BIT(position)))
169 return 0;
170 }
171
172 /*
173 * Delay is arbitrary - the specification doesn't say how long
174 * we are expected to wait. Extra check required to make sure
175 * we don't wait needlessly on the last iteration.
176 */
177 if (i - 1)
178 udelay(1);
179 }
180
181 return -EAGAIN;
182}
183
184
185static void etm_set_prog(struct etm_drvdata *drvdata)
186{
187 u32 etmcr;
188
189 etmcr = etm_readl(drvdata, ETMCR);
190 etmcr |= ETMCR_ETM_PRG;
191 etm_writel(drvdata, etmcr, ETMCR);
192 /*
193 * Recommended by spec for cp14 accesses to ensure etmcr write is
194 * complete before polling etmsr
195 */
196 isb();
197 if (coresight_timeout_etm(drvdata, ETMSR, ETMSR_PROG_BIT, 1)) {
198 dev_err(drvdata->dev,
199 "timeout observed when probing at offset %#x\n", ETMSR);
200 }
201}
202
203static void etm_clr_prog(struct etm_drvdata *drvdata)
204{
205 u32 etmcr;
206
207 etmcr = etm_readl(drvdata, ETMCR);
208 etmcr &= ~ETMCR_ETM_PRG;
209 etm_writel(drvdata, etmcr, ETMCR);
210 /*
211 * Recommended by spec for cp14 accesses to ensure etmcr write is
212 * complete before polling etmsr
213 */
214 isb();
215 if (coresight_timeout_etm(drvdata, ETMSR, ETMSR_PROG_BIT, 0)) {
216 dev_err(drvdata->dev,
217 "timeout observed when probing at offset %#x\n", ETMSR);
218 }
219}
220
221static void etm_set_default(struct etm_drvdata *drvdata)
222{
223 int i;
224
225 drvdata->trigger_event = ETM_DEFAULT_EVENT_VAL;
226 drvdata->enable_event = ETM_HARD_WIRE_RES_A;
227
228 drvdata->seq_12_event = ETM_DEFAULT_EVENT_VAL;
229 drvdata->seq_21_event = ETM_DEFAULT_EVENT_VAL;
230 drvdata->seq_23_event = ETM_DEFAULT_EVENT_VAL;
231 drvdata->seq_31_event = ETM_DEFAULT_EVENT_VAL;
232 drvdata->seq_32_event = ETM_DEFAULT_EVENT_VAL;
233 drvdata->seq_13_event = ETM_DEFAULT_EVENT_VAL;
234 drvdata->timestamp_event = ETM_DEFAULT_EVENT_VAL;
235
236 for (i = 0; i < drvdata->nr_cntr; i++) {
237 drvdata->cntr_rld_val[i] = 0x0;
238 drvdata->cntr_event[i] = ETM_DEFAULT_EVENT_VAL;
239 drvdata->cntr_rld_event[i] = ETM_DEFAULT_EVENT_VAL;
240 drvdata->cntr_val[i] = 0x0;
241 }
242
243 drvdata->seq_curr_state = 0x0;
244 drvdata->ctxid_idx = 0x0;
245 for (i = 0; i < drvdata->nr_ctxid_cmp; i++)
246 drvdata->ctxid_val[i] = 0x0;
247 drvdata->ctxid_mask = 0x0;
248}
249
250static void etm_enable_hw(void *info)
251{
252 int i;
253 u32 etmcr;
254 struct etm_drvdata *drvdata = info;
255
256 CS_UNLOCK(drvdata->base);
257
258 /* Turn engine on */
259 etm_clr_pwrdwn(drvdata);
260 /* Apply power to trace registers */
261 etm_set_pwrup(drvdata);
262 /* Make sure all registers are accessible */
263 etm_os_unlock(drvdata);
264
265 etm_set_prog(drvdata);
266
267 etmcr = etm_readl(drvdata, ETMCR);
268 etmcr &= (ETMCR_PWD_DWN | ETMCR_ETM_PRG);
269 etmcr |= drvdata->port_size;
270 etm_writel(drvdata, drvdata->ctrl | etmcr, ETMCR);
271 etm_writel(drvdata, drvdata->trigger_event, ETMTRIGGER);
272 etm_writel(drvdata, drvdata->startstop_ctrl, ETMTSSCR);
273 etm_writel(drvdata, drvdata->enable_event, ETMTEEVR);
274 etm_writel(drvdata, drvdata->enable_ctrl1, ETMTECR1);
275 etm_writel(drvdata, drvdata->fifofull_level, ETMFFLR);
276 for (i = 0; i < drvdata->nr_addr_cmp; i++) {
277 etm_writel(drvdata, drvdata->addr_val[i], ETMACVRn(i));
278 etm_writel(drvdata, drvdata->addr_acctype[i], ETMACTRn(i));
279 }
280 for (i = 0; i < drvdata->nr_cntr; i++) {
281 etm_writel(drvdata, drvdata->cntr_rld_val[i], ETMCNTRLDVRn(i));
282 etm_writel(drvdata, drvdata->cntr_event[i], ETMCNTENRn(i));
283 etm_writel(drvdata, drvdata->cntr_rld_event[i],
284 ETMCNTRLDEVRn(i));
285 etm_writel(drvdata, drvdata->cntr_val[i], ETMCNTVRn(i));
286 }
287 etm_writel(drvdata, drvdata->seq_12_event, ETMSQ12EVR);
288 etm_writel(drvdata, drvdata->seq_21_event, ETMSQ21EVR);
289 etm_writel(drvdata, drvdata->seq_23_event, ETMSQ23EVR);
290 etm_writel(drvdata, drvdata->seq_31_event, ETMSQ31EVR);
291 etm_writel(drvdata, drvdata->seq_32_event, ETMSQ32EVR);
292 etm_writel(drvdata, drvdata->seq_13_event, ETMSQ13EVR);
293 etm_writel(drvdata, drvdata->seq_curr_state, ETMSQR);
294 for (i = 0; i < drvdata->nr_ext_out; i++)
295 etm_writel(drvdata, ETM_DEFAULT_EVENT_VAL, ETMEXTOUTEVRn(i));
296 for (i = 0; i < drvdata->nr_ctxid_cmp; i++)
297 etm_writel(drvdata, drvdata->ctxid_val[i], ETMCIDCVRn(i));
298 etm_writel(drvdata, drvdata->ctxid_mask, ETMCIDCMR);
299 etm_writel(drvdata, drvdata->sync_freq, ETMSYNCFR);
300 /* No external input selected */
301 etm_writel(drvdata, 0x0, ETMEXTINSELR);
302 etm_writel(drvdata, drvdata->timestamp_event, ETMTSEVR);
303 /* No auxiliary control selected */
304 etm_writel(drvdata, 0x0, ETMAUXCR);
305 etm_writel(drvdata, drvdata->traceid, ETMTRACEIDR);
306 /* No VMID comparator value selected */
307 etm_writel(drvdata, 0x0, ETMVMIDCVR);
308
309 /* Ensures trace output is enabled from this ETM */
310 etm_writel(drvdata, drvdata->ctrl | ETMCR_ETM_EN | etmcr, ETMCR);
311
312 etm_clr_prog(drvdata);
313 CS_LOCK(drvdata->base);
314
315 dev_dbg(drvdata->dev, "cpu: %d enable smp call done\n", drvdata->cpu);
316}
317
318static int etm_trace_id_simple(struct etm_drvdata *drvdata)
319{
320 if (!drvdata->enable)
321 return drvdata->traceid;
322
323 return (etm_readl(drvdata, ETMTRACEIDR) & ETM_TRACEID_MASK);
324}
325
326static int etm_trace_id(struct coresight_device *csdev)
327{
328 struct etm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
329 unsigned long flags;
330 int trace_id = -1;
331
332 if (!drvdata->enable)
333 return drvdata->traceid;
334
335 if (clk_prepare_enable(drvdata->clk))
336 goto out;
337
338 spin_lock_irqsave(&drvdata->spinlock, flags);
339
340 CS_UNLOCK(drvdata->base);
341 trace_id = (etm_readl(drvdata, ETMTRACEIDR) & ETM_TRACEID_MASK);
342 CS_LOCK(drvdata->base);
343
344 spin_unlock_irqrestore(&drvdata->spinlock, flags);
345 clk_disable_unprepare(drvdata->clk);
346out:
347 return trace_id;
348}
349
350static int etm_enable(struct coresight_device *csdev)
351{
352 struct etm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
353 int ret;
354
355 ret = clk_prepare_enable(drvdata->clk);
356 if (ret)
357 goto err_clk;
358
359 spin_lock(&drvdata->spinlock);
360
361 /*
362 * Configure the ETM only if the CPU is online. If it isn't online
363 * hw configuration will take place when 'CPU_STARTING' is received
364 * in @etm_cpu_callback.
365 */
366 if (cpu_online(drvdata->cpu)) {
367 ret = smp_call_function_single(drvdata->cpu,
368 etm_enable_hw, drvdata, 1);
369 if (ret)
370 goto err;
371 }
372
373 drvdata->enable = true;
374 drvdata->sticky_enable = true;
375
376 spin_unlock(&drvdata->spinlock);
377
378 dev_info(drvdata->dev, "ETM tracing enabled\n");
379 return 0;
380err:
381 spin_unlock(&drvdata->spinlock);
382 clk_disable_unprepare(drvdata->clk);
383err_clk:
384 return ret;
385}
386
387static void etm_disable_hw(void *info)
388{
389 int i;
390 struct etm_drvdata *drvdata = info;
391
392 CS_UNLOCK(drvdata->base);
393 etm_set_prog(drvdata);
394
395 /* Program trace enable to low by using always false event */
396 etm_writel(drvdata, ETM_HARD_WIRE_RES_A | ETM_EVENT_NOT_A, ETMTEEVR);
397
398 /* Read back sequencer and counters for post trace analysis */
399 drvdata->seq_curr_state = (etm_readl(drvdata, ETMSQR) & ETM_SQR_MASK);
400
401 for (i = 0; i < drvdata->nr_cntr; i++)
402 drvdata->cntr_val[i] = etm_readl(drvdata, ETMCNTVRn(i));
403
404 etm_set_pwrdwn(drvdata);
405 CS_LOCK(drvdata->base);
406
407 dev_dbg(drvdata->dev, "cpu: %d disable smp call done\n", drvdata->cpu);
408}
409
410static void etm_disable(struct coresight_device *csdev)
411{
412 struct etm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
413
414 /*
415 * Taking hotplug lock here protects from clocks getting disabled
416 * with tracing being left on (crash scenario) if user disable occurs
417 * after cpu online mask indicates the cpu is offline but before the
418 * DYING hotplug callback is serviced by the ETM driver.
419 */
420 get_online_cpus();
421 spin_lock(&drvdata->spinlock);
422
423 /*
424 * Executing etm_disable_hw on the cpu whose ETM is being disabled
425 * ensures that register writes occur when cpu is powered.
426 */
427 smp_call_function_single(drvdata->cpu, etm_disable_hw, drvdata, 1);
428 drvdata->enable = false;
429
430 spin_unlock(&drvdata->spinlock);
431 put_online_cpus();
432
433 clk_disable_unprepare(drvdata->clk);
434
435 dev_info(drvdata->dev, "ETM tracing disabled\n");
436}
437
438static const struct coresight_ops_source etm_source_ops = {
439 .trace_id = etm_trace_id,
440 .enable = etm_enable,
441 .disable = etm_disable,
442};
443
444static const struct coresight_ops etm_cs_ops = {
445 .source_ops = &etm_source_ops,
446};
447
448static ssize_t nr_addr_cmp_show(struct device *dev,
449 struct device_attribute *attr, char *buf)
450{
451 unsigned long val;
452 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
453
454 val = drvdata->nr_addr_cmp;
455 return sprintf(buf, "%#lx\n", val);
456}
457static DEVICE_ATTR_RO(nr_addr_cmp);
458
459static ssize_t nr_cntr_show(struct device *dev,
460 struct device_attribute *attr, char *buf)
461{ unsigned long val;
462 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
463
464 val = drvdata->nr_cntr;
465 return sprintf(buf, "%#lx\n", val);
466}
467static DEVICE_ATTR_RO(nr_cntr);
468
469static ssize_t nr_ctxid_cmp_show(struct device *dev,
470 struct device_attribute *attr, char *buf)
471{
472 unsigned long val;
473 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
474
475 val = drvdata->nr_ctxid_cmp;
476 return sprintf(buf, "%#lx\n", val);
477}
478static DEVICE_ATTR_RO(nr_ctxid_cmp);
479
480static ssize_t etmsr_show(struct device *dev,
481 struct device_attribute *attr, char *buf)
482{
483 int ret;
484 unsigned long flags, val;
485 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
486
487 ret = clk_prepare_enable(drvdata->clk);
488 if (ret)
489 return ret;
490
491 spin_lock_irqsave(&drvdata->spinlock, flags);
492 CS_UNLOCK(drvdata->base);
493
494 val = etm_readl(drvdata, ETMSR);
495
496 CS_LOCK(drvdata->base);
497 spin_unlock_irqrestore(&drvdata->spinlock, flags);
498 clk_disable_unprepare(drvdata->clk);
499
500 return sprintf(buf, "%#lx\n", val);
501}
502static DEVICE_ATTR_RO(etmsr);
503
504static ssize_t reset_store(struct device *dev,
505 struct device_attribute *attr,
506 const char *buf, size_t size)
507{
508 int i, ret;
509 unsigned long val;
510 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
511
512 ret = kstrtoul(buf, 16, &val);
513 if (ret)
514 return ret;
515
516 if (val) {
517 spin_lock(&drvdata->spinlock);
518 drvdata->mode = ETM_MODE_EXCLUDE;
519 drvdata->ctrl = 0x0;
520 drvdata->trigger_event = ETM_DEFAULT_EVENT_VAL;
521 drvdata->startstop_ctrl = 0x0;
522 drvdata->addr_idx = 0x0;
523 for (i = 0; i < drvdata->nr_addr_cmp; i++) {
524 drvdata->addr_val[i] = 0x0;
525 drvdata->addr_acctype[i] = 0x0;
526 drvdata->addr_type[i] = ETM_ADDR_TYPE_NONE;
527 }
528 drvdata->cntr_idx = 0x0;
529
530 etm_set_default(drvdata);
531 spin_unlock(&drvdata->spinlock);
532 }
533
534 return size;
535}
536static DEVICE_ATTR_WO(reset);
537
538static ssize_t mode_show(struct device *dev,
539 struct device_attribute *attr, char *buf)
540{
541 unsigned long val;
542 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
543
544 val = drvdata->mode;
545 return sprintf(buf, "%#lx\n", val);
546}
547
548static ssize_t mode_store(struct device *dev,
549 struct device_attribute *attr,
550 const char *buf, size_t size)
551{
552 int ret;
553 unsigned long val;
554 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
555
556 ret = kstrtoul(buf, 16, &val);
557 if (ret)
558 return ret;
559
560 spin_lock(&drvdata->spinlock);
561 drvdata->mode = val & ETM_MODE_ALL;
562
563 if (drvdata->mode & ETM_MODE_EXCLUDE)
564 drvdata->enable_ctrl1 |= ETMTECR1_INC_EXC;
565 else
566 drvdata->enable_ctrl1 &= ~ETMTECR1_INC_EXC;
567
568 if (drvdata->mode & ETM_MODE_CYCACC)
569 drvdata->ctrl |= ETMCR_CYC_ACC;
570 else
571 drvdata->ctrl &= ~ETMCR_CYC_ACC;
572
573 if (drvdata->mode & ETM_MODE_STALL) {
574 if (!(drvdata->etmccr & ETMCCR_FIFOFULL)) {
575 dev_warn(drvdata->dev, "stall mode not supported\n");
576 return -EINVAL;
577 }
578 drvdata->ctrl |= ETMCR_STALL_MODE;
579 } else
580 drvdata->ctrl &= ~ETMCR_STALL_MODE;
581
582 if (drvdata->mode & ETM_MODE_TIMESTAMP) {
583 if (!(drvdata->etmccer & ETMCCER_TIMESTAMP)) {
584 dev_warn(drvdata->dev, "timestamp not supported\n");
585 return -EINVAL;
586 }
587 drvdata->ctrl |= ETMCR_TIMESTAMP_EN;
588 } else
589 drvdata->ctrl &= ~ETMCR_TIMESTAMP_EN;
590
591 if (drvdata->mode & ETM_MODE_CTXID)
592 drvdata->ctrl |= ETMCR_CTXID_SIZE;
593 else
594 drvdata->ctrl &= ~ETMCR_CTXID_SIZE;
595 spin_unlock(&drvdata->spinlock);
596
597 return size;
598}
599static DEVICE_ATTR_RW(mode);
600
601static ssize_t trigger_event_show(struct device *dev,
602 struct device_attribute *attr, char *buf)
603{
604 unsigned long val;
605 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
606
607 val = drvdata->trigger_event;
608 return sprintf(buf, "%#lx\n", val);
609}
610
611static ssize_t trigger_event_store(struct device *dev,
612 struct device_attribute *attr,
613 const char *buf, size_t size)
614{
615 int ret;
616 unsigned long val;
617 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
618
619 ret = kstrtoul(buf, 16, &val);
620 if (ret)
621 return ret;
622
623 drvdata->trigger_event = val & ETM_EVENT_MASK;
624
625 return size;
626}
627static DEVICE_ATTR_RW(trigger_event);
628
629static ssize_t enable_event_show(struct device *dev,
630 struct device_attribute *attr, char *buf)
631{
632 unsigned long val;
633 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
634
635 val = drvdata->enable_event;
636 return sprintf(buf, "%#lx\n", val);
637}
638
639static ssize_t enable_event_store(struct device *dev,
640 struct device_attribute *attr,
641 const char *buf, size_t size)
642{
643 int ret;
644 unsigned long val;
645 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
646
647 ret = kstrtoul(buf, 16, &val);
648 if (ret)
649 return ret;
650
651 drvdata->enable_event = val & ETM_EVENT_MASK;
652
653 return size;
654}
655static DEVICE_ATTR_RW(enable_event);
656
657static ssize_t fifofull_level_show(struct device *dev,
658 struct device_attribute *attr, char *buf)
659{
660 unsigned long val;
661 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
662
663 val = drvdata->fifofull_level;
664 return sprintf(buf, "%#lx\n", val);
665}
666
667static ssize_t fifofull_level_store(struct device *dev,
668 struct device_attribute *attr,
669 const char *buf, size_t size)
670{
671 int ret;
672 unsigned long val;
673 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
674
675 ret = kstrtoul(buf, 16, &val);
676 if (ret)
677 return ret;
678
679 drvdata->fifofull_level = val;
680
681 return size;
682}
683static DEVICE_ATTR_RW(fifofull_level);
684
685static ssize_t addr_idx_show(struct device *dev,
686 struct device_attribute *attr, char *buf)
687{
688 unsigned long val;
689 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
690
691 val = drvdata->addr_idx;
692 return sprintf(buf, "%#lx\n", val);
693}
694
695static ssize_t addr_idx_store(struct device *dev,
696 struct device_attribute *attr,
697 const char *buf, size_t size)
698{
699 int ret;
700 unsigned long val;
701 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
702
703 ret = kstrtoul(buf, 16, &val);
704 if (ret)
705 return ret;
706
707 if (val >= drvdata->nr_addr_cmp)
708 return -EINVAL;
709
710 /*
711 * Use spinlock to ensure index doesn't change while it gets
712 * dereferenced multiple times within a spinlock block elsewhere.
713 */
714 spin_lock(&drvdata->spinlock);
715 drvdata->addr_idx = val;
716 spin_unlock(&drvdata->spinlock);
717
718 return size;
719}
720static DEVICE_ATTR_RW(addr_idx);
721
722static ssize_t addr_single_show(struct device *dev,
723 struct device_attribute *attr, char *buf)
724{
725 u8 idx;
726 unsigned long val;
727 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
728
729 spin_lock(&drvdata->spinlock);
730 idx = drvdata->addr_idx;
731 if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
732 drvdata->addr_type[idx] == ETM_ADDR_TYPE_SINGLE)) {
733 spin_unlock(&drvdata->spinlock);
734 return -EINVAL;
735 }
736
737 val = drvdata->addr_val[idx];
738 spin_unlock(&drvdata->spinlock);
739
740 return sprintf(buf, "%#lx\n", val);
741}
742
743static ssize_t addr_single_store(struct device *dev,
744 struct device_attribute *attr,
745 const char *buf, size_t size)
746{
747 u8 idx;
748 int ret;
749 unsigned long val;
750 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
751
752 ret = kstrtoul(buf, 16, &val);
753 if (ret)
754 return ret;
755
756 spin_lock(&drvdata->spinlock);
757 idx = drvdata->addr_idx;
758 if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
759 drvdata->addr_type[idx] == ETM_ADDR_TYPE_SINGLE)) {
760 spin_unlock(&drvdata->spinlock);
761 return -EINVAL;
762 }
763
764 drvdata->addr_val[idx] = val;
765 drvdata->addr_type[idx] = ETM_ADDR_TYPE_SINGLE;
766 spin_unlock(&drvdata->spinlock);
767
768 return size;
769}
770static DEVICE_ATTR_RW(addr_single);
771
772static ssize_t addr_range_show(struct device *dev,
773 struct device_attribute *attr, char *buf)
774{
775 u8 idx;
776 unsigned long val1, val2;
777 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
778
779 spin_lock(&drvdata->spinlock);
780 idx = drvdata->addr_idx;
781 if (idx % 2 != 0) {
782 spin_unlock(&drvdata->spinlock);
783 return -EPERM;
784 }
785 if (!((drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE &&
786 drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_NONE) ||
787 (drvdata->addr_type[idx] == ETM_ADDR_TYPE_RANGE &&
788 drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_RANGE))) {
789 spin_unlock(&drvdata->spinlock);
790 return -EPERM;
791 }
792
793 val1 = drvdata->addr_val[idx];
794 val2 = drvdata->addr_val[idx + 1];
795 spin_unlock(&drvdata->spinlock);
796
797 return sprintf(buf, "%#lx %#lx\n", val1, val2);
798}
799
800static ssize_t addr_range_store(struct device *dev,
801 struct device_attribute *attr,
802 const char *buf, size_t size)
803{
804 u8 idx;
805 unsigned long val1, val2;
806 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
807
808 if (sscanf(buf, "%lx %lx", &val1, &val2) != 2)
809 return -EINVAL;
810 /* Lower address comparator cannot have a higher address value */
811 if (val1 > val2)
812 return -EINVAL;
813
814 spin_lock(&drvdata->spinlock);
815 idx = drvdata->addr_idx;
816 if (idx % 2 != 0) {
817 spin_unlock(&drvdata->spinlock);
818 return -EPERM;
819 }
820 if (!((drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE &&
821 drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_NONE) ||
822 (drvdata->addr_type[idx] == ETM_ADDR_TYPE_RANGE &&
823 drvdata->addr_type[idx + 1] == ETM_ADDR_TYPE_RANGE))) {
824 spin_unlock(&drvdata->spinlock);
825 return -EPERM;
826 }
827
828 drvdata->addr_val[idx] = val1;
829 drvdata->addr_type[idx] = ETM_ADDR_TYPE_RANGE;
830 drvdata->addr_val[idx + 1] = val2;
831 drvdata->addr_type[idx + 1] = ETM_ADDR_TYPE_RANGE;
832 drvdata->enable_ctrl1 |= (1 << (idx/2));
833 spin_unlock(&drvdata->spinlock);
834
835 return size;
836}
837static DEVICE_ATTR_RW(addr_range);
838
839static ssize_t addr_start_show(struct device *dev,
840 struct device_attribute *attr, char *buf)
841{
842 u8 idx;
843 unsigned long val;
844 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
845
846 spin_lock(&drvdata->spinlock);
847 idx = drvdata->addr_idx;
848 if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
849 drvdata->addr_type[idx] == ETM_ADDR_TYPE_START)) {
850 spin_unlock(&drvdata->spinlock);
851 return -EPERM;
852 }
853
854 val = drvdata->addr_val[idx];
855 spin_unlock(&drvdata->spinlock);
856
857 return sprintf(buf, "%#lx\n", val);
858}
859
860static ssize_t addr_start_store(struct device *dev,
861 struct device_attribute *attr,
862 const char *buf, size_t size)
863{
864 u8 idx;
865 int ret;
866 unsigned long val;
867 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
868
869 ret = kstrtoul(buf, 16, &val);
870 if (ret)
871 return ret;
872
873 spin_lock(&drvdata->spinlock);
874 idx = drvdata->addr_idx;
875 if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
876 drvdata->addr_type[idx] == ETM_ADDR_TYPE_START)) {
877 spin_unlock(&drvdata->spinlock);
878 return -EPERM;
879 }
880
881 drvdata->addr_val[idx] = val;
882 drvdata->addr_type[idx] = ETM_ADDR_TYPE_START;
883 drvdata->startstop_ctrl |= (1 << idx);
884 drvdata->enable_ctrl1 |= BIT(25);
885 spin_unlock(&drvdata->spinlock);
886
887 return size;
888}
889static DEVICE_ATTR_RW(addr_start);
890
891static ssize_t addr_stop_show(struct device *dev,
892 struct device_attribute *attr, char *buf)
893{
894 u8 idx;
895 unsigned long val;
896 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
897
898 spin_lock(&drvdata->spinlock);
899 idx = drvdata->addr_idx;
900 if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
901 drvdata->addr_type[idx] == ETM_ADDR_TYPE_STOP)) {
902 spin_unlock(&drvdata->spinlock);
903 return -EPERM;
904 }
905
906 val = drvdata->addr_val[idx];
907 spin_unlock(&drvdata->spinlock);
908
909 return sprintf(buf, "%#lx\n", val);
910}
911
912static ssize_t addr_stop_store(struct device *dev,
913 struct device_attribute *attr,
914 const char *buf, size_t size)
915{
916 u8 idx;
917 int ret;
918 unsigned long val;
919 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
920
921 ret = kstrtoul(buf, 16, &val);
922 if (ret)
923 return ret;
924
925 spin_lock(&drvdata->spinlock);
926 idx = drvdata->addr_idx;
927 if (!(drvdata->addr_type[idx] == ETM_ADDR_TYPE_NONE ||
928 drvdata->addr_type[idx] == ETM_ADDR_TYPE_STOP)) {
929 spin_unlock(&drvdata->spinlock);
930 return -EPERM;
931 }
932
933 drvdata->addr_val[idx] = val;
934 drvdata->addr_type[idx] = ETM_ADDR_TYPE_STOP;
935 drvdata->startstop_ctrl |= (1 << (idx + 16));
936 drvdata->enable_ctrl1 |= ETMTECR1_START_STOP;
937 spin_unlock(&drvdata->spinlock);
938
939 return size;
940}
941static DEVICE_ATTR_RW(addr_stop);
942
943static ssize_t addr_acctype_show(struct device *dev,
944 struct device_attribute *attr, char *buf)
945{
946 unsigned long val;
947 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
948
949 spin_lock(&drvdata->spinlock);
950 val = drvdata->addr_acctype[drvdata->addr_idx];
951 spin_unlock(&drvdata->spinlock);
952
953 return sprintf(buf, "%#lx\n", val);
954}
955
956static ssize_t addr_acctype_store(struct device *dev,
957 struct device_attribute *attr,
958 const char *buf, size_t size)
959{
960 int ret;
961 unsigned long val;
962 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
963
964 ret = kstrtoul(buf, 16, &val);
965 if (ret)
966 return ret;
967
968 spin_lock(&drvdata->spinlock);
969 drvdata->addr_acctype[drvdata->addr_idx] = val;
970 spin_unlock(&drvdata->spinlock);
971
972 return size;
973}
974static DEVICE_ATTR_RW(addr_acctype);
975
976static ssize_t cntr_idx_show(struct device *dev,
977 struct device_attribute *attr, char *buf)
978{
979 unsigned long val;
980 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
981
982 val = drvdata->cntr_idx;
983 return sprintf(buf, "%#lx\n", val);
984}
985
986static ssize_t cntr_idx_store(struct device *dev,
987 struct device_attribute *attr,
988 const char *buf, size_t size)
989{
990 int ret;
991 unsigned long val;
992 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
993
994 ret = kstrtoul(buf, 16, &val);
995 if (ret)
996 return ret;
997
998 if (val >= drvdata->nr_cntr)
999 return -EINVAL;
1000 /*
1001 * Use spinlock to ensure index doesn't change while it gets
1002 * dereferenced multiple times within a spinlock block elsewhere.
1003 */
1004 spin_lock(&drvdata->spinlock);
1005 drvdata->cntr_idx = val;
1006 spin_unlock(&drvdata->spinlock);
1007
1008 return size;
1009}
1010static DEVICE_ATTR_RW(cntr_idx);
1011
1012static ssize_t cntr_rld_val_show(struct device *dev,
1013 struct device_attribute *attr, char *buf)
1014{
1015 unsigned long val;
1016 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1017
1018 spin_lock(&drvdata->spinlock);
1019 val = drvdata->cntr_rld_val[drvdata->cntr_idx];
1020 spin_unlock(&drvdata->spinlock);
1021
1022 return sprintf(buf, "%#lx\n", val);
1023}
1024
1025static ssize_t cntr_rld_val_store(struct device *dev,
1026 struct device_attribute *attr,
1027 const char *buf, size_t size)
1028{
1029 int ret;
1030 unsigned long val;
1031 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1032
1033 ret = kstrtoul(buf, 16, &val);
1034 if (ret)
1035 return ret;
1036
1037 spin_lock(&drvdata->spinlock);
1038 drvdata->cntr_rld_val[drvdata->cntr_idx] = val;
1039 spin_unlock(&drvdata->spinlock);
1040
1041 return size;
1042}
1043static DEVICE_ATTR_RW(cntr_rld_val);
1044
1045static ssize_t cntr_event_show(struct device *dev,
1046 struct device_attribute *attr, char *buf)
1047{
1048 unsigned long val;
1049 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1050
1051 spin_lock(&drvdata->spinlock);
1052 val = drvdata->cntr_event[drvdata->cntr_idx];
1053 spin_unlock(&drvdata->spinlock);
1054
1055 return sprintf(buf, "%#lx\n", val);
1056}
1057
1058static ssize_t cntr_event_store(struct device *dev,
1059 struct device_attribute *attr,
1060 const char *buf, size_t size)
1061{
1062 int ret;
1063 unsigned long val;
1064 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1065
1066 ret = kstrtoul(buf, 16, &val);
1067 if (ret)
1068 return ret;
1069
1070 spin_lock(&drvdata->spinlock);
1071 drvdata->cntr_event[drvdata->cntr_idx] = val & ETM_EVENT_MASK;
1072 spin_unlock(&drvdata->spinlock);
1073
1074 return size;
1075}
1076static DEVICE_ATTR_RW(cntr_event);
1077
1078static ssize_t cntr_rld_event_show(struct device *dev,
1079 struct device_attribute *attr, char *buf)
1080{
1081 unsigned long val;
1082 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1083
1084 spin_lock(&drvdata->spinlock);
1085 val = drvdata->cntr_rld_event[drvdata->cntr_idx];
1086 spin_unlock(&drvdata->spinlock);
1087
1088 return sprintf(buf, "%#lx\n", val);
1089}
1090
1091static ssize_t cntr_rld_event_store(struct device *dev,
1092 struct device_attribute *attr,
1093 const char *buf, size_t size)
1094{
1095 int ret;
1096 unsigned long val;
1097 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1098
1099 ret = kstrtoul(buf, 16, &val);
1100 if (ret)
1101 return ret;
1102
1103 spin_lock(&drvdata->spinlock);
1104 drvdata->cntr_rld_event[drvdata->cntr_idx] = val & ETM_EVENT_MASK;
1105 spin_unlock(&drvdata->spinlock);
1106
1107 return size;
1108}
1109static DEVICE_ATTR_RW(cntr_rld_event);
1110
1111static ssize_t cntr_val_show(struct device *dev,
1112 struct device_attribute *attr, char *buf)
1113{
1114 int i, ret = 0;
1115 u32 val;
1116 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1117
1118 if (!drvdata->enable) {
1119 spin_lock(&drvdata->spinlock);
1120 for (i = 0; i < drvdata->nr_cntr; i++)
1121 ret += sprintf(buf, "counter %d: %x\n",
1122 i, drvdata->cntr_val[i]);
1123 spin_unlock(&drvdata->spinlock);
1124 return ret;
1125 }
1126
1127 for (i = 0; i < drvdata->nr_cntr; i++) {
1128 val = etm_readl(drvdata, ETMCNTVRn(i));
1129 ret += sprintf(buf, "counter %d: %x\n", i, val);
1130 }
1131
1132 return ret;
1133}
1134
1135static ssize_t cntr_val_store(struct device *dev,
1136 struct device_attribute *attr,
1137 const char *buf, size_t size)
1138{
1139 int ret;
1140 unsigned long val;
1141 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1142
1143 ret = kstrtoul(buf, 16, &val);
1144 if (ret)
1145 return ret;
1146
1147 spin_lock(&drvdata->spinlock);
1148 drvdata->cntr_val[drvdata->cntr_idx] = val;
1149 spin_unlock(&drvdata->spinlock);
1150
1151 return size;
1152}
1153static DEVICE_ATTR_RW(cntr_val);
1154
1155static ssize_t seq_12_event_show(struct device *dev,
1156 struct device_attribute *attr, char *buf)
1157{
1158 unsigned long val;
1159 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1160
1161 val = drvdata->seq_12_event;
1162 return sprintf(buf, "%#lx\n", val);
1163}
1164
1165static ssize_t seq_12_event_store(struct device *dev,
1166 struct device_attribute *attr,
1167 const char *buf, size_t size)
1168{
1169 int ret;
1170 unsigned long val;
1171 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1172
1173 ret = kstrtoul(buf, 16, &val);
1174 if (ret)
1175 return ret;
1176
1177 drvdata->seq_12_event = val & ETM_EVENT_MASK;
1178 return size;
1179}
1180static DEVICE_ATTR_RW(seq_12_event);
1181
1182static ssize_t seq_21_event_show(struct device *dev,
1183 struct device_attribute *attr, char *buf)
1184{
1185 unsigned long val;
1186 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1187
1188 val = drvdata->seq_21_event;
1189 return sprintf(buf, "%#lx\n", val);
1190}
1191
1192static ssize_t seq_21_event_store(struct device *dev,
1193 struct device_attribute *attr,
1194 const char *buf, size_t size)
1195{
1196 int ret;
1197 unsigned long val;
1198 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1199
1200 ret = kstrtoul(buf, 16, &val);
1201 if (ret)
1202 return ret;
1203
1204 drvdata->seq_21_event = val & ETM_EVENT_MASK;
1205 return size;
1206}
1207static DEVICE_ATTR_RW(seq_21_event);
1208
1209static ssize_t seq_23_event_show(struct device *dev,
1210 struct device_attribute *attr, char *buf)
1211{
1212 unsigned long val;
1213 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1214
1215 val = drvdata->seq_23_event;
1216 return sprintf(buf, "%#lx\n", val);
1217}
1218
1219static ssize_t seq_23_event_store(struct device *dev,
1220 struct device_attribute *attr,
1221 const char *buf, size_t size)
1222{
1223 int ret;
1224 unsigned long val;
1225 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1226
1227 ret = kstrtoul(buf, 16, &val);
1228 if (ret)
1229 return ret;
1230
1231 drvdata->seq_23_event = val & ETM_EVENT_MASK;
1232 return size;
1233}
1234static DEVICE_ATTR_RW(seq_23_event);
1235
1236static ssize_t seq_31_event_show(struct device *dev,
1237 struct device_attribute *attr, char *buf)
1238{
1239 unsigned long val;
1240 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1241
1242 val = drvdata->seq_31_event;
1243 return sprintf(buf, "%#lx\n", val);
1244}
1245
1246static ssize_t seq_31_event_store(struct device *dev,
1247 struct device_attribute *attr,
1248 const char *buf, size_t size)
1249{
1250 int ret;
1251 unsigned long val;
1252 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1253
1254 ret = kstrtoul(buf, 16, &val);
1255 if (ret)
1256 return ret;
1257
1258 drvdata->seq_31_event = val & ETM_EVENT_MASK;
1259 return size;
1260}
1261static DEVICE_ATTR_RW(seq_31_event);
1262
1263static ssize_t seq_32_event_show(struct device *dev,
1264 struct device_attribute *attr, char *buf)
1265{
1266 unsigned long val;
1267 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1268
1269 val = drvdata->seq_32_event;
1270 return sprintf(buf, "%#lx\n", val);
1271}
1272
1273static ssize_t seq_32_event_store(struct device *dev,
1274 struct device_attribute *attr,
1275 const char *buf, size_t size)
1276{
1277 int ret;
1278 unsigned long val;
1279 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1280
1281 ret = kstrtoul(buf, 16, &val);
1282 if (ret)
1283 return ret;
1284
1285 drvdata->seq_32_event = val & ETM_EVENT_MASK;
1286 return size;
1287}
1288static DEVICE_ATTR_RW(seq_32_event);
1289
1290static ssize_t seq_13_event_show(struct device *dev,
1291 struct device_attribute *attr, char *buf)
1292{
1293 unsigned long val;
1294 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1295
1296 val = drvdata->seq_13_event;
1297 return sprintf(buf, "%#lx\n", val);
1298}
1299
1300static ssize_t seq_13_event_store(struct device *dev,
1301 struct device_attribute *attr,
1302 const char *buf, size_t size)
1303{
1304 int ret;
1305 unsigned long val;
1306 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1307
1308 ret = kstrtoul(buf, 16, &val);
1309 if (ret)
1310 return ret;
1311
1312 drvdata->seq_13_event = val & ETM_EVENT_MASK;
1313 return size;
1314}
1315static DEVICE_ATTR_RW(seq_13_event);
1316
1317static ssize_t seq_curr_state_show(struct device *dev,
1318 struct device_attribute *attr, char *buf)
1319{
1320 int ret;
1321 unsigned long val, flags;
1322 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1323
1324 if (!drvdata->enable) {
1325 val = drvdata->seq_curr_state;
1326 goto out;
1327 }
1328
1329 ret = clk_prepare_enable(drvdata->clk);
1330 if (ret)
1331 return ret;
1332
1333 spin_lock_irqsave(&drvdata->spinlock, flags);
1334
1335 CS_UNLOCK(drvdata->base);
1336 val = (etm_readl(drvdata, ETMSQR) & ETM_SQR_MASK);
1337 CS_LOCK(drvdata->base);
1338
1339 spin_unlock_irqrestore(&drvdata->spinlock, flags);
1340 clk_disable_unprepare(drvdata->clk);
1341out:
1342 return sprintf(buf, "%#lx\n", val);
1343}
1344
1345static ssize_t seq_curr_state_store(struct device *dev,
1346 struct device_attribute *attr,
1347 const char *buf, size_t size)
1348{
1349 int ret;
1350 unsigned long val;
1351 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1352
1353 ret = kstrtoul(buf, 16, &val);
1354 if (ret)
1355 return ret;
1356
1357 if (val > ETM_SEQ_STATE_MAX_VAL)
1358 return -EINVAL;
1359
1360 drvdata->seq_curr_state = val;
1361
1362 return size;
1363}
1364static DEVICE_ATTR_RW(seq_curr_state);
1365
1366static ssize_t ctxid_idx_show(struct device *dev,
1367 struct device_attribute *attr, char *buf)
1368{
1369 unsigned long val;
1370 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1371
1372 val = drvdata->ctxid_idx;
1373 return sprintf(buf, "%#lx\n", val);
1374}
1375
1376static ssize_t ctxid_idx_store(struct device *dev,
1377 struct device_attribute *attr,
1378 const char *buf, size_t size)
1379{
1380 int ret;
1381 unsigned long val;
1382 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1383
1384 ret = kstrtoul(buf, 16, &val);
1385 if (ret)
1386 return ret;
1387
1388 if (val >= drvdata->nr_ctxid_cmp)
1389 return -EINVAL;
1390
1391 /*
1392 * Use spinlock to ensure index doesn't change while it gets
1393 * dereferenced multiple times within a spinlock block elsewhere.
1394 */
1395 spin_lock(&drvdata->spinlock);
1396 drvdata->ctxid_idx = val;
1397 spin_unlock(&drvdata->spinlock);
1398
1399 return size;
1400}
1401static DEVICE_ATTR_RW(ctxid_idx);
1402
1403static ssize_t ctxid_val_show(struct device *dev,
1404 struct device_attribute *attr, char *buf)
1405{
1406 unsigned long val;
1407 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1408
1409 spin_lock(&drvdata->spinlock);
1410 val = drvdata->ctxid_val[drvdata->ctxid_idx];
1411 spin_unlock(&drvdata->spinlock);
1412
1413 return sprintf(buf, "%#lx\n", val);
1414}
1415
1416static ssize_t ctxid_val_store(struct device *dev,
1417 struct device_attribute *attr,
1418 const char *buf, size_t size)
1419{
1420 int ret;
1421 unsigned long val;
1422 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1423
1424 ret = kstrtoul(buf, 16, &val);
1425 if (ret)
1426 return ret;
1427
1428 spin_lock(&drvdata->spinlock);
1429 drvdata->ctxid_val[drvdata->ctxid_idx] = val;
1430 spin_unlock(&drvdata->spinlock);
1431
1432 return size;
1433}
1434static DEVICE_ATTR_RW(ctxid_val);
1435
1436static ssize_t ctxid_mask_show(struct device *dev,
1437 struct device_attribute *attr, char *buf)
1438{
1439 unsigned long val;
1440 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1441
1442 val = drvdata->ctxid_mask;
1443 return sprintf(buf, "%#lx\n", val);
1444}
1445
1446static ssize_t ctxid_mask_store(struct device *dev,
1447 struct device_attribute *attr,
1448 const char *buf, size_t size)
1449{
1450 int ret;
1451 unsigned long val;
1452 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1453
1454 ret = kstrtoul(buf, 16, &val);
1455 if (ret)
1456 return ret;
1457
1458 drvdata->ctxid_mask = val;
1459 return size;
1460}
1461static DEVICE_ATTR_RW(ctxid_mask);
1462
1463static ssize_t sync_freq_show(struct device *dev,
1464 struct device_attribute *attr, char *buf)
1465{
1466 unsigned long val;
1467 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1468
1469 val = drvdata->sync_freq;
1470 return sprintf(buf, "%#lx\n", val);
1471}
1472
1473static ssize_t sync_freq_store(struct device *dev,
1474 struct device_attribute *attr,
1475 const char *buf, size_t size)
1476{
1477 int ret;
1478 unsigned long val;
1479 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1480
1481 ret = kstrtoul(buf, 16, &val);
1482 if (ret)
1483 return ret;
1484
1485 drvdata->sync_freq = val & ETM_SYNC_MASK;
1486 return size;
1487}
1488static DEVICE_ATTR_RW(sync_freq);
1489
1490static ssize_t timestamp_event_show(struct device *dev,
1491 struct device_attribute *attr, char *buf)
1492{
1493 unsigned long val;
1494 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1495
1496 val = drvdata->timestamp_event;
1497 return sprintf(buf, "%#lx\n", val);
1498}
1499
1500static ssize_t timestamp_event_store(struct device *dev,
1501 struct device_attribute *attr,
1502 const char *buf, size_t size)
1503{
1504 int ret;
1505 unsigned long val;
1506 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1507
1508 ret = kstrtoul(buf, 16, &val);
1509 if (ret)
1510 return ret;
1511
1512 drvdata->timestamp_event = val & ETM_EVENT_MASK;
1513 return size;
1514}
1515static DEVICE_ATTR_RW(timestamp_event);
1516
1517static ssize_t status_show(struct device *dev,
1518 struct device_attribute *attr, char *buf)
1519{
1520 int ret;
1521 unsigned long flags;
1522 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1523
1524 ret = clk_prepare_enable(drvdata->clk);
1525 if (ret)
1526 return ret;
1527
1528 spin_lock_irqsave(&drvdata->spinlock, flags);
1529
1530 CS_UNLOCK(drvdata->base);
1531 ret = sprintf(buf,
1532 "ETMCCR: 0x%08x\n"
1533 "ETMCCER: 0x%08x\n"
1534 "ETMSCR: 0x%08x\n"
1535 "ETMIDR: 0x%08x\n"
1536 "ETMCR: 0x%08x\n"
1537 "ETMTRACEIDR: 0x%08x\n"
1538 "Enable event: 0x%08x\n"
1539 "Enable start/stop: 0x%08x\n"
1540 "Enable control: CR1 0x%08x CR2 0x%08x\n"
1541 "CPU affinity: %d\n",
1542 drvdata->etmccr, drvdata->etmccer,
1543 etm_readl(drvdata, ETMSCR), etm_readl(drvdata, ETMIDR),
1544 etm_readl(drvdata, ETMCR), etm_trace_id_simple(drvdata),
1545 etm_readl(drvdata, ETMTEEVR),
1546 etm_readl(drvdata, ETMTSSCR),
1547 etm_readl(drvdata, ETMTECR1),
1548 etm_readl(drvdata, ETMTECR2),
1549 drvdata->cpu);
1550 CS_LOCK(drvdata->base);
1551
1552 spin_unlock_irqrestore(&drvdata->spinlock, flags);
1553 clk_disable_unprepare(drvdata->clk);
1554
1555 return ret;
1556}
1557static DEVICE_ATTR_RO(status);
1558
1559static ssize_t traceid_show(struct device *dev,
1560 struct device_attribute *attr, char *buf)
1561{
1562 int ret;
1563 unsigned long val, flags;
1564 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1565
1566 if (!drvdata->enable) {
1567 val = drvdata->traceid;
1568 goto out;
1569 }
1570
1571 ret = clk_prepare_enable(drvdata->clk);
1572 if (ret)
1573 return ret;
1574
1575 spin_lock_irqsave(&drvdata->spinlock, flags);
1576 CS_UNLOCK(drvdata->base);
1577
1578 val = (etm_readl(drvdata, ETMTRACEIDR) & ETM_TRACEID_MASK);
1579
1580 CS_LOCK(drvdata->base);
1581 spin_unlock_irqrestore(&drvdata->spinlock, flags);
1582 clk_disable_unprepare(drvdata->clk);
1583out:
1584 return sprintf(buf, "%#lx\n", val);
1585}
1586
1587static ssize_t traceid_store(struct device *dev,
1588 struct device_attribute *attr,
1589 const char *buf, size_t size)
1590{
1591 int ret;
1592 unsigned long val;
1593 struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
1594
1595 ret = kstrtoul(buf, 16, &val);
1596 if (ret)
1597 return ret;
1598
1599 drvdata->traceid = val & ETM_TRACEID_MASK;
1600 return size;
1601}
1602static DEVICE_ATTR_RW(traceid);
1603
1604static struct attribute *coresight_etm_attrs[] = {
1605 &dev_attr_nr_addr_cmp.attr,
1606 &dev_attr_nr_cntr.attr,
1607 &dev_attr_nr_ctxid_cmp.attr,
1608 &dev_attr_etmsr.attr,
1609 &dev_attr_reset.attr,
1610 &dev_attr_mode.attr,
1611 &dev_attr_trigger_event.attr,
1612 &dev_attr_enable_event.attr,
1613 &dev_attr_fifofull_level.attr,
1614 &dev_attr_addr_idx.attr,
1615 &dev_attr_addr_single.attr,
1616 &dev_attr_addr_range.attr,
1617 &dev_attr_addr_start.attr,
1618 &dev_attr_addr_stop.attr,
1619 &dev_attr_addr_acctype.attr,
1620 &dev_attr_cntr_idx.attr,
1621 &dev_attr_cntr_rld_val.attr,
1622 &dev_attr_cntr_event.attr,
1623 &dev_attr_cntr_rld_event.attr,
1624 &dev_attr_cntr_val.attr,
1625 &dev_attr_seq_12_event.attr,
1626 &dev_attr_seq_21_event.attr,
1627 &dev_attr_seq_23_event.attr,
1628 &dev_attr_seq_31_event.attr,
1629 &dev_attr_seq_32_event.attr,
1630 &dev_attr_seq_13_event.attr,
1631 &dev_attr_seq_curr_state.attr,
1632 &dev_attr_ctxid_idx.attr,
1633 &dev_attr_ctxid_val.attr,
1634 &dev_attr_ctxid_mask.attr,
1635 &dev_attr_sync_freq.attr,
1636 &dev_attr_timestamp_event.attr,
1637 &dev_attr_status.attr,
1638 &dev_attr_traceid.attr,
1639 NULL,
1640};
1641ATTRIBUTE_GROUPS(coresight_etm);
1642
1643static int etm_cpu_callback(struct notifier_block *nfb, unsigned long action,
1644 void *hcpu)
1645{
1646 unsigned int cpu = (unsigned long)hcpu;
1647
1648 if (!etmdrvdata[cpu])
1649 goto out;
1650
1651 switch (action & (~CPU_TASKS_FROZEN)) {
1652 case CPU_STARTING:
1653 spin_lock(&etmdrvdata[cpu]->spinlock);
1654 if (!etmdrvdata[cpu]->os_unlock) {
1655 etm_os_unlock(etmdrvdata[cpu]);
1656 etmdrvdata[cpu]->os_unlock = true;
1657 }
1658
1659 if (etmdrvdata[cpu]->enable)
1660 etm_enable_hw(etmdrvdata[cpu]);
1661 spin_unlock(&etmdrvdata[cpu]->spinlock);
1662 break;
1663
1664 case CPU_ONLINE:
1665 if (etmdrvdata[cpu]->boot_enable &&
1666 !etmdrvdata[cpu]->sticky_enable)
1667 coresight_enable(etmdrvdata[cpu]->csdev);
1668 break;
1669
1670 case CPU_DYING:
1671 spin_lock(&etmdrvdata[cpu]->spinlock);
1672 if (etmdrvdata[cpu]->enable)
1673 etm_disable_hw(etmdrvdata[cpu]);
1674 spin_unlock(&etmdrvdata[cpu]->spinlock);
1675 break;
1676 }
1677out:
1678 return NOTIFY_OK;
1679}
1680
1681static struct notifier_block etm_cpu_notifier = {
1682 .notifier_call = etm_cpu_callback,
1683};
1684
1685static bool etm_arch_supported(u8 arch)
1686{
1687 switch (arch) {
1688 case ETM_ARCH_V3_3:
1689 break;
1690 case ETM_ARCH_V3_5:
1691 break;
1692 case PFT_ARCH_V1_0:
1693 break;
1694 case PFT_ARCH_V1_1:
1695 break;
1696 default:
1697 return false;
1698 }
1699 return true;
1700}
1701
1702static void etm_init_arch_data(void *info)
1703{
1704 u32 etmidr;
1705 u32 etmccr;
1706 struct etm_drvdata *drvdata = info;
1707
1708 CS_UNLOCK(drvdata->base);
1709
1710 /* First dummy read */
1711 (void)etm_readl(drvdata, ETMPDSR);
1712 /* Provide power to ETM: ETMPDCR[3] == 1 */
1713 etm_set_pwrup(drvdata);
1714 /*
1715 * Clear power down bit since when this bit is set writes to
1716 * certain registers might be ignored.
1717 */
1718 etm_clr_pwrdwn(drvdata);
1719 /*
1720 * Set prog bit. It will be set from reset but this is included to
1721 * ensure it is set
1722 */
1723 etm_set_prog(drvdata);
1724
1725 /* Find all capabilities */
1726 etmidr = etm_readl(drvdata, ETMIDR);
1727 drvdata->arch = BMVAL(etmidr, 4, 11);
1728 drvdata->port_size = etm_readl(drvdata, ETMCR) & PORT_SIZE_MASK;
1729
1730 drvdata->etmccer = etm_readl(drvdata, ETMCCER);
1731 etmccr = etm_readl(drvdata, ETMCCR);
1732 drvdata->etmccr = etmccr;
1733 drvdata->nr_addr_cmp = BMVAL(etmccr, 0, 3) * 2;
1734 drvdata->nr_cntr = BMVAL(etmccr, 13, 15);
1735 drvdata->nr_ext_inp = BMVAL(etmccr, 17, 19);
1736 drvdata->nr_ext_out = BMVAL(etmccr, 20, 22);
1737 drvdata->nr_ctxid_cmp = BMVAL(etmccr, 24, 25);
1738
1739 etm_set_pwrdwn(drvdata);
1740 etm_clr_pwrup(drvdata);
1741 CS_LOCK(drvdata->base);
1742}
1743
1744static void etm_init_default_data(struct etm_drvdata *drvdata)
1745{
1746 static int etm3x_traceid;
1747
1748 u32 flags = (1 << 0 | /* instruction execute*/
1749 3 << 3 | /* ARM instruction */
1750 0 << 5 | /* No data value comparison */
1751 0 << 7 | /* No exact mach */
1752 0 << 8 | /* Ignore context ID */
1753 0 << 10); /* Security ignored */
1754
1755 /*
1756 * Initial configuration only - guarantees sources handled by
1757 * this driver have a unique ID at startup time but not between
1758 * all other types of sources. For that we lean on the core
1759 * framework.
1760 */
1761 drvdata->traceid = etm3x_traceid++;
1762 drvdata->ctrl = (ETMCR_CYC_ACC | ETMCR_TIMESTAMP_EN);
1763 drvdata->enable_ctrl1 = ETMTECR1_ADDR_COMP_1;
1764 if (drvdata->nr_addr_cmp >= 2) {
1765 drvdata->addr_val[0] = (u32) _stext;
1766 drvdata->addr_val[1] = (u32) _etext;
1767 drvdata->addr_acctype[0] = flags;
1768 drvdata->addr_acctype[1] = flags;
1769 drvdata->addr_type[0] = ETM_ADDR_TYPE_RANGE;
1770 drvdata->addr_type[1] = ETM_ADDR_TYPE_RANGE;
1771 }
1772
1773 etm_set_default(drvdata);
1774}
1775
1776static int etm_probe(struct amba_device *adev, const struct amba_id *id)
1777{
1778 int ret;
1779 void __iomem *base;
1780 struct device *dev = &adev->dev;
1781 struct coresight_platform_data *pdata = NULL;
1782 struct etm_drvdata *drvdata;
1783 struct resource *res = &adev->res;
1784 struct coresight_desc *desc;
1785 struct device_node *np = adev->dev.of_node;
1786
1787 desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
1788 if (!desc)
1789 return -ENOMEM;
1790
1791 drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
1792 if (!drvdata)
1793 return -ENOMEM;
1794
1795 if (np) {
1796 pdata = of_get_coresight_platform_data(dev, np);
1797 if (IS_ERR(pdata))
1798 return PTR_ERR(pdata);
1799
1800 adev->dev.platform_data = pdata;
1801 drvdata->use_cp14 = of_property_read_bool(np, "arm,cp14");
1802 }
1803
1804 drvdata->dev = &adev->dev;
1805 dev_set_drvdata(dev, drvdata);
1806
1807 /* Validity for the resource is already checked by the AMBA core */
1808 base = devm_ioremap_resource(dev, res);
1809 if (IS_ERR(base))
1810 return PTR_ERR(base);
1811
1812 drvdata->base = base;
1813
1814 spin_lock_init(&drvdata->spinlock);
1815
1816 drvdata->clk = adev->pclk;
1817 ret = clk_prepare_enable(drvdata->clk);
1818 if (ret)
1819 return ret;
1820
1821 drvdata->cpu = pdata ? pdata->cpu : 0;
1822
1823 get_online_cpus();
1824 etmdrvdata[drvdata->cpu] = drvdata;
1825
1826 if (!smp_call_function_single(drvdata->cpu, etm_os_unlock, drvdata, 1))
1827 drvdata->os_unlock = true;
1828
1829 if (smp_call_function_single(drvdata->cpu,
1830 etm_init_arch_data, drvdata, 1))
1831 dev_err(dev, "ETM arch init failed\n");
1832
1833 if (!etm_count++)
1834 register_hotcpu_notifier(&etm_cpu_notifier);
1835
1836 put_online_cpus();
1837
1838 if (etm_arch_supported(drvdata->arch) == false) {
1839 ret = -EINVAL;
1840 goto err_arch_supported;
1841 }
1842 etm_init_default_data(drvdata);
1843
1844 clk_disable_unprepare(drvdata->clk);
1845
1846 desc->type = CORESIGHT_DEV_TYPE_SOURCE;
1847 desc->subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_PROC;
1848 desc->ops = &etm_cs_ops;
1849 desc->pdata = pdata;
1850 desc->dev = dev;
1851 desc->groups = coresight_etm_groups;
1852 drvdata->csdev = coresight_register(desc);
1853 if (IS_ERR(drvdata->csdev)) {
1854 ret = PTR_ERR(drvdata->csdev);
1855 goto err_arch_supported;
1856 }
1857
1858 dev_info(dev, "ETM initialized\n");
1859
1860 if (boot_enable) {
1861 coresight_enable(drvdata->csdev);
1862 drvdata->boot_enable = true;
1863 }
1864
1865 return 0;
1866
1867err_arch_supported:
1868 clk_disable_unprepare(drvdata->clk);
1869 if (--etm_count == 0)
1870 unregister_hotcpu_notifier(&etm_cpu_notifier);
1871 return ret;
1872}
1873
1874static int etm_remove(struct amba_device *adev)
1875{
1876 struct etm_drvdata *drvdata = amba_get_drvdata(adev);
1877
1878 coresight_unregister(drvdata->csdev);
1879 if (--etm_count == 0)
1880 unregister_hotcpu_notifier(&etm_cpu_notifier);
1881
1882 return 0;
1883}
1884
1885static struct amba_id etm_ids[] = {
1886 { /* ETM 3.3 */
1887 .id = 0x0003b921,
1888 .mask = 0x0003ffff,
1889 },
1890 { /* ETM 3.5 */
1891 .id = 0x0003b956,
1892 .mask = 0x0003ffff,
1893 },
1894 { /* PTM 1.0 */
1895 .id = 0x0003b950,
1896 .mask = 0x0003ffff,
1897 },
1898 { /* PTM 1.1 */
1899 .id = 0x0003b95f,
1900 .mask = 0x0003ffff,
1901 },
1902 { 0, 0},
1903};
1904
1905static struct amba_driver etm_driver = {
1906 .drv = {
1907 .name = "coresight-etm3x",
1908 .owner = THIS_MODULE,
1909 },
1910 .probe = etm_probe,
1911 .remove = etm_remove,
1912 .id_table = etm_ids,
1913};
1914
1915int __init etm_init(void)
1916{
1917 return amba_driver_register(&etm_driver);
1918}
1919module_init(etm_init);
1920
1921void __exit etm_exit(void)
1922{
1923 amba_driver_unregister(&etm_driver);
1924}
1925module_exit(etm_exit);
1926
1927MODULE_LICENSE("GPL v2");
1928MODULE_DESCRIPTION("CoreSight Program Flow Trace driver");
Linux 6.x block layer and io_uring tree(s)