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sysfs: Remove support for tagged directories with untagged members (again)
[linux-btrfs-devel.git] / arch / mips / kernel / perf_event_mipsxx.c
blobe5ad09a9baf7f55ab2fbf3f0ba602a6f7eb5a4c8
1 #if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64) || \
2 defined(CONFIG_CPU_R10000) || defined(CONFIG_CPU_SB1)
3
4 #define M_CONFIG1_PC (1 << 4)
5
6 #define M_PERFCTL_EXL (1UL << 0)
7 #define M_PERFCTL_KERNEL (1UL << 1)
8 #define M_PERFCTL_SUPERVISOR (1UL << 2)
9 #define M_PERFCTL_USER (1UL << 3)
10 #define M_PERFCTL_INTERRUPT_ENABLE (1UL << 4)
11 #define M_PERFCTL_EVENT(event) (((event) & 0x3ff) << 5)
12 #define M_PERFCTL_VPEID(vpe) ((vpe) << 16)
13 #define M_PERFCTL_MT_EN(filter) ((filter) << 20)
14 #define M_TC_EN_ALL M_PERFCTL_MT_EN(0)
15 #define M_TC_EN_VPE M_PERFCTL_MT_EN(1)
16 #define M_TC_EN_TC M_PERFCTL_MT_EN(2)
17 #define M_PERFCTL_TCID(tcid) ((tcid) << 22)
18 #define M_PERFCTL_WIDE (1UL << 30)
19 #define M_PERFCTL_MORE (1UL << 31)
20
21 #define M_PERFCTL_COUNT_EVENT_WHENEVER (M_PERFCTL_EXL | \
22 M_PERFCTL_KERNEL | \
23 M_PERFCTL_USER | \
24 M_PERFCTL_SUPERVISOR | \
25 M_PERFCTL_INTERRUPT_ENABLE)
26
27 #ifdef CONFIG_MIPS_MT_SMP
28 #define M_PERFCTL_CONFIG_MASK 0x3fff801f
29 #else
30 #define M_PERFCTL_CONFIG_MASK 0x1f
31 #endif
32 #define M_PERFCTL_EVENT_MASK 0xfe0
33
34 #define M_COUNTER_OVERFLOW (1UL << 31)
35
36 #ifdef CONFIG_MIPS_MT_SMP
37 static int cpu_has_mipsmt_pertccounters;
38
39 /*
40 * FIXME: For VSMP, vpe_id() is redefined for Perf-events, because
41 * cpu_data[cpuid].vpe_id reports 0 for _both_ CPUs.
42 */
43 #if defined(CONFIG_HW_PERF_EVENTS)
44 #define vpe_id() (cpu_has_mipsmt_pertccounters ? \
45 0 : smp_processor_id())
46 #else
47 #define vpe_id() (cpu_has_mipsmt_pertccounters ? \
48 0 : cpu_data[smp_processor_id()].vpe_id)
49 #endif
50
51 /* Copied from op_model_mipsxx.c */
52 static inline unsigned int vpe_shift(void)
53 {
54 if (num_possible_cpus() > 1)
55 return 1;
56
57 return 0;
58 }
59 #else /* !CONFIG_MIPS_MT_SMP */
60 #define vpe_id() 0
61
62 static inline unsigned int vpe_shift(void)
63 {
64 return 0;
65 }
66 #endif /* CONFIG_MIPS_MT_SMP */
67
68 static inline unsigned int
69 counters_total_to_per_cpu(unsigned int counters)
70 {
71 return counters >> vpe_shift();
72 }
73
74 static inline unsigned int
75 counters_per_cpu_to_total(unsigned int counters)
76 {
77 return counters << vpe_shift();
78 }
79
80 #define __define_perf_accessors(r, n, np) \
81 \
82 static inline unsigned int r_c0_ ## r ## n(void) \
83 { \
84 unsigned int cpu = vpe_id(); \
85 \
86 switch (cpu) { \
87 case 0: \
88 return read_c0_ ## r ## n(); \
89 case 1: \
90 return read_c0_ ## r ## np(); \
91 default: \
92 BUG(); \
93 } \
94 return 0; \
95 } \
96 \
97 static inline void w_c0_ ## r ## n(unsigned int value) \
98 { \
99 unsigned int cpu = vpe_id(); \
100 \
101 switch (cpu) { \
102 case 0: \
103 write_c0_ ## r ## n(value); \
104 return; \
105 case 1: \
106 write_c0_ ## r ## np(value); \
107 return; \
108 default: \
109 BUG(); \
110 } \
111 return; \
112 } \
113
114 __define_perf_accessors(perfcntr, 0, 2)
115 __define_perf_accessors(perfcntr, 1, 3)
116 __define_perf_accessors(perfcntr, 2, 0)
117 __define_perf_accessors(perfcntr, 3, 1)
118
119 __define_perf_accessors(perfctrl, 0, 2)
120 __define_perf_accessors(perfctrl, 1, 3)
121 __define_perf_accessors(perfctrl, 2, 0)
122 __define_perf_accessors(perfctrl, 3, 1)
123
124 static inline int __n_counters(void)
125 {
126 if (!(read_c0_config1() & M_CONFIG1_PC))
127 return 0;
128 if (!(read_c0_perfctrl0() & M_PERFCTL_MORE))
129 return 1;
130 if (!(read_c0_perfctrl1() & M_PERFCTL_MORE))
131 return 2;
132 if (!(read_c0_perfctrl2() & M_PERFCTL_MORE))
133 return 3;
134
135 return 4;
136 }
137
138 static inline int n_counters(void)
139 {
140 int counters;
141
142 switch (current_cpu_type()) {
143 case CPU_R10000:
144 counters = 2;
145 break;
146
147 case CPU_R12000:
148 case CPU_R14000:
149 counters = 4;
150 break;
151
152 default:
153 counters = __n_counters();
154 }
155
156 return counters;
157 }
158
159 static void reset_counters(void *arg)
160 {
161 int counters = (int)(long)arg;
162 switch (counters) {
163 case 4:
164 w_c0_perfctrl3(0);
165 w_c0_perfcntr3(0);
166 case 3:
167 w_c0_perfctrl2(0);
168 w_c0_perfcntr2(0);
169 case 2:
170 w_c0_perfctrl1(0);
171 w_c0_perfcntr1(0);
172 case 1:
173 w_c0_perfctrl0(0);
174 w_c0_perfcntr0(0);
175 }
176 }
177
178 static inline u64
179 mipsxx_pmu_read_counter(unsigned int idx)
180 {
181 switch (idx) {
182 case 0:
183 return r_c0_perfcntr0();
184 case 1:
185 return r_c0_perfcntr1();
186 case 2:
187 return r_c0_perfcntr2();
188 case 3:
189 return r_c0_perfcntr3();
190 default:
191 WARN_ONCE(1, "Invalid performance counter number (%d)\n", idx);
192 return 0;
193 }
194 }
195
196 static inline void
197 mipsxx_pmu_write_counter(unsigned int idx, u64 val)
198 {
199 switch (idx) {
200 case 0:
201 w_c0_perfcntr0(val);
202 return;
203 case 1:
204 w_c0_perfcntr1(val);
205 return;
206 case 2:
207 w_c0_perfcntr2(val);
208 return;
209 case 3:
210 w_c0_perfcntr3(val);
211 return;
212 }
213 }
214
215 static inline unsigned int
216 mipsxx_pmu_read_control(unsigned int idx)
217 {
218 switch (idx) {
219 case 0:
220 return r_c0_perfctrl0();
221 case 1:
222 return r_c0_perfctrl1();
223 case 2:
224 return r_c0_perfctrl2();
225 case 3:
226 return r_c0_perfctrl3();
227 default:
228 WARN_ONCE(1, "Invalid performance counter number (%d)\n", idx);
229 return 0;
230 }
231 }
232
233 static inline void
234 mipsxx_pmu_write_control(unsigned int idx, unsigned int val)
235 {
236 switch (idx) {
237 case 0:
238 w_c0_perfctrl0(val);
239 return;
240 case 1:
241 w_c0_perfctrl1(val);
242 return;
243 case 2:
244 w_c0_perfctrl2(val);
245 return;
246 case 3:
247 w_c0_perfctrl3(val);
248 return;
249 }
250 }
251
252 #ifdef CONFIG_MIPS_MT_SMP
253 static DEFINE_RWLOCK(pmuint_rwlock);
254 #endif
255
256 /* 24K/34K/1004K cores can share the same event map. */
257 static const struct mips_perf_event mipsxxcore_event_map
258 [PERF_COUNT_HW_MAX] = {
259 [PERF_COUNT_HW_CPU_CYCLES] = { 0x00, CNTR_EVEN | CNTR_ODD, P },
260 [PERF_COUNT_HW_INSTRUCTIONS] = { 0x01, CNTR_EVEN | CNTR_ODD, T },
261 [PERF_COUNT_HW_CACHE_REFERENCES] = { UNSUPPORTED_PERF_EVENT_ID },
262 [PERF_COUNT_HW_CACHE_MISSES] = { UNSUPPORTED_PERF_EVENT_ID },
263 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = { 0x02, CNTR_EVEN, T },
264 [PERF_COUNT_HW_BRANCH_MISSES] = { 0x02, CNTR_ODD, T },
265 [PERF_COUNT_HW_BUS_CYCLES] = { UNSUPPORTED_PERF_EVENT_ID },
266 };
267
268 /* 74K core has different branch event code. */
269 static const struct mips_perf_event mipsxx74Kcore_event_map
270 [PERF_COUNT_HW_MAX] = {
271 [PERF_COUNT_HW_CPU_CYCLES] = { 0x00, CNTR_EVEN | CNTR_ODD, P },
272 [PERF_COUNT_HW_INSTRUCTIONS] = { 0x01, CNTR_EVEN | CNTR_ODD, T },
273 [PERF_COUNT_HW_CACHE_REFERENCES] = { UNSUPPORTED_PERF_EVENT_ID },
274 [PERF_COUNT_HW_CACHE_MISSES] = { UNSUPPORTED_PERF_EVENT_ID },
275 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = { 0x27, CNTR_EVEN, T },
276 [PERF_COUNT_HW_BRANCH_MISSES] = { 0x27, CNTR_ODD, T },
277 [PERF_COUNT_HW_BUS_CYCLES] = { UNSUPPORTED_PERF_EVENT_ID },
278 };
279
280 /* 24K/34K/1004K cores can share the same cache event map. */
281 static const struct mips_perf_event mipsxxcore_cache_map
282 [PERF_COUNT_HW_CACHE_MAX]
283 [PERF_COUNT_HW_CACHE_OP_MAX]
284 [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
285 [C(L1D)] = {
286 /*
287 * Like some other architectures (e.g. ARM), the performance
288 * counters don't differentiate between read and write
289 * accesses/misses, so this isn't strictly correct, but it's the
290 * best we can do. Writes and reads get combined.
291 */
292 [C(OP_READ)] = {
293 [C(RESULT_ACCESS)] = { 0x0a, CNTR_EVEN, T },
294 [C(RESULT_MISS)] = { 0x0b, CNTR_EVEN | CNTR_ODD, T },
295 },
296 [C(OP_WRITE)] = {
297 [C(RESULT_ACCESS)] = { 0x0a, CNTR_EVEN, T },
298 [C(RESULT_MISS)] = { 0x0b, CNTR_EVEN | CNTR_ODD, T },
299 },
300 [C(OP_PREFETCH)] = {
301 [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
302 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
303 },
304 },
305 [C(L1I)] = {
306 [C(OP_READ)] = {
307 [C(RESULT_ACCESS)] = { 0x09, CNTR_EVEN, T },
308 [C(RESULT_MISS)] = { 0x09, CNTR_ODD, T },
309 },
310 [C(OP_WRITE)] = {
311 [C(RESULT_ACCESS)] = { 0x09, CNTR_EVEN, T },
312 [C(RESULT_MISS)] = { 0x09, CNTR_ODD, T },
313 },
314 [C(OP_PREFETCH)] = {
315 [C(RESULT_ACCESS)] = { 0x14, CNTR_EVEN, T },
316 /*
317 * Note that MIPS has only "hit" events countable for
318 * the prefetch operation.
319 */
320 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
321 },
322 },
323 [C(LL)] = {
324 [C(OP_READ)] = {
325 [C(RESULT_ACCESS)] = { 0x15, CNTR_ODD, P },
326 [C(RESULT_MISS)] = { 0x16, CNTR_EVEN, P },
327 },
328 [C(OP_WRITE)] = {
329 [C(RESULT_ACCESS)] = { 0x15, CNTR_ODD, P },
330 [C(RESULT_MISS)] = { 0x16, CNTR_EVEN, P },
331 },
332 [C(OP_PREFETCH)] = {
333 [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
334 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
335 },
336 },
337 [C(DTLB)] = {
338 [C(OP_READ)] = {
339 [C(RESULT_ACCESS)] = { 0x06, CNTR_EVEN, T },
340 [C(RESULT_MISS)] = { 0x06, CNTR_ODD, T },
341 },
342 [C(OP_WRITE)] = {
343 [C(RESULT_ACCESS)] = { 0x06, CNTR_EVEN, T },
344 [C(RESULT_MISS)] = { 0x06, CNTR_ODD, T },
345 },
346 [C(OP_PREFETCH)] = {
347 [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
348 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
349 },
350 },
351 [C(ITLB)] = {
352 [C(OP_READ)] = {
353 [C(RESULT_ACCESS)] = { 0x05, CNTR_EVEN, T },
354 [C(RESULT_MISS)] = { 0x05, CNTR_ODD, T },
355 },
356 [C(OP_WRITE)] = {
357 [C(RESULT_ACCESS)] = { 0x05, CNTR_EVEN, T },
358 [C(RESULT_MISS)] = { 0x05, CNTR_ODD, T },
359 },
360 [C(OP_PREFETCH)] = {
361 [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
362 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
363 },
364 },
365 [C(BPU)] = {
366 /* Using the same code for *HW_BRANCH* */
367 [C(OP_READ)] = {
368 [C(RESULT_ACCESS)] = { 0x02, CNTR_EVEN, T },
369 [C(RESULT_MISS)] = { 0x02, CNTR_ODD, T },
370 },
371 [C(OP_WRITE)] = {
372 [C(RESULT_ACCESS)] = { 0x02, CNTR_EVEN, T },
373 [C(RESULT_MISS)] = { 0x02, CNTR_ODD, T },
374 },
375 [C(OP_PREFETCH)] = {
376 [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
377 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
378 },
379 },
380 [C(NODE)] = {
381 [C(OP_READ)] = {
382 [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
383 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
384 },
385 [C(OP_WRITE)] = {
386 [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
387 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
388 },
389 [C(OP_PREFETCH)] = {
390 [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
391 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
392 },
393 },
394 };
395
396 /* 74K core has completely different cache event map. */
397 static const struct mips_perf_event mipsxx74Kcore_cache_map
398 [PERF_COUNT_HW_CACHE_MAX]
399 [PERF_COUNT_HW_CACHE_OP_MAX]
400 [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
401 [C(L1D)] = {
402 /*
403 * Like some other architectures (e.g. ARM), the performance
404 * counters don't differentiate between read and write
405 * accesses/misses, so this isn't strictly correct, but it's the
406 * best we can do. Writes and reads get combined.
407 */
408 [C(OP_READ)] = {
409 [C(RESULT_ACCESS)] = { 0x17, CNTR_ODD, T },
410 [C(RESULT_MISS)] = { 0x18, CNTR_ODD, T },
411 },
412 [C(OP_WRITE)] = {
413 [C(RESULT_ACCESS)] = { 0x17, CNTR_ODD, T },
414 [C(RESULT_MISS)] = { 0x18, CNTR_ODD, T },
415 },
416 [C(OP_PREFETCH)] = {
417 [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
418 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
419 },
420 },
421 [C(L1I)] = {
422 [C(OP_READ)] = {
423 [C(RESULT_ACCESS)] = { 0x06, CNTR_EVEN, T },
424 [C(RESULT_MISS)] = { 0x06, CNTR_ODD, T },
425 },
426 [C(OP_WRITE)] = {
427 [C(RESULT_ACCESS)] = { 0x06, CNTR_EVEN, T },
428 [C(RESULT_MISS)] = { 0x06, CNTR_ODD, T },
429 },
430 [C(OP_PREFETCH)] = {
431 [C(RESULT_ACCESS)] = { 0x34, CNTR_EVEN, T },
432 /*
433 * Note that MIPS has only "hit" events countable for
434 * the prefetch operation.
435 */
436 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
437 },
438 },
439 [C(LL)] = {
440 [C(OP_READ)] = {
441 [C(RESULT_ACCESS)] = { 0x1c, CNTR_ODD, P },
442 [C(RESULT_MISS)] = { 0x1d, CNTR_EVEN | CNTR_ODD, P },
443 },
444 [C(OP_WRITE)] = {
445 [C(RESULT_ACCESS)] = { 0x1c, CNTR_ODD, P },
446 [C(RESULT_MISS)] = { 0x1d, CNTR_EVEN | CNTR_ODD, P },
447 },
448 [C(OP_PREFETCH)] = {
449 [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
450 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
451 },
452 },
453 [C(DTLB)] = {
454 /* 74K core does not have specific DTLB events. */
455 [C(OP_READ)] = {
456 [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
457 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
458 },
459 [C(OP_WRITE)] = {
460 [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
461 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
462 },
463 [C(OP_PREFETCH)] = {
464 [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
465 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
466 },
467 },
468 [C(ITLB)] = {
469 [C(OP_READ)] = {
470 [C(RESULT_ACCESS)] = { 0x04, CNTR_EVEN, T },
471 [C(RESULT_MISS)] = { 0x04, CNTR_ODD, T },
472 },
473 [C(OP_WRITE)] = {
474 [C(RESULT_ACCESS)] = { 0x04, CNTR_EVEN, T },
475 [C(RESULT_MISS)] = { 0x04, CNTR_ODD, T },
476 },
477 [C(OP_PREFETCH)] = {
478 [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
479 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
480 },
481 },
482 [C(BPU)] = {
483 /* Using the same code for *HW_BRANCH* */
484 [C(OP_READ)] = {
485 [C(RESULT_ACCESS)] = { 0x27, CNTR_EVEN, T },
486 [C(RESULT_MISS)] = { 0x27, CNTR_ODD, T },
487 },
488 [C(OP_WRITE)] = {
489 [C(RESULT_ACCESS)] = { 0x27, CNTR_EVEN, T },
490 [C(RESULT_MISS)] = { 0x27, CNTR_ODD, T },
491 },
492 [C(OP_PREFETCH)] = {
493 [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
494 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
495 },
496 },
497 [C(NODE)] = {
498 [C(OP_READ)] = {
499 [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
500 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
501 },
502 [C(OP_WRITE)] = {
503 [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
504 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
505 },
506 [C(OP_PREFETCH)] = {
507 [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
508 [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
509 },
510 },
511 };
512
513 #ifdef CONFIG_MIPS_MT_SMP
514 static void
515 check_and_calc_range(struct perf_event *event,
516 const struct mips_perf_event *pev)
517 {
518 struct hw_perf_event *hwc = &event->hw;
519
520 if (event->cpu >= 0) {
521 if (pev->range > V) {
522 /*
523 * The user selected an event that is processor
524 * wide, while expecting it to be VPE wide.
525 */
526 hwc->config_base |= M_TC_EN_ALL;
527 } else {
528 /*
529 * FIXME: cpu_data[event->cpu].vpe_id reports 0
530 * for both CPUs.
531 */
532 hwc->config_base |= M_PERFCTL_VPEID(event->cpu);
533 hwc->config_base |= M_TC_EN_VPE;
534 }
535 } else
536 hwc->config_base |= M_TC_EN_ALL;
537 }
538 #else
539 static void
540 check_and_calc_range(struct perf_event *event,
541 const struct mips_perf_event *pev)
542 {
543 }
544 #endif
545
546 static int __hw_perf_event_init(struct perf_event *event)
547 {
548 struct perf_event_attr *attr = &event->attr;
549 struct hw_perf_event *hwc = &event->hw;
550 const struct mips_perf_event *pev;
551 int err;
552
553 /* Returning MIPS event descriptor for generic perf event. */
554 if (PERF_TYPE_HARDWARE == event->attr.type) {
555 if (event->attr.config >= PERF_COUNT_HW_MAX)
556 return -EINVAL;
557 pev = mipspmu_map_general_event(event->attr.config);
558 } else if (PERF_TYPE_HW_CACHE == event->attr.type) {
559 pev = mipspmu_map_cache_event(event->attr.config);
560 } else if (PERF_TYPE_RAW == event->attr.type) {
561 /* We are working on the global raw event. */
562 mutex_lock(&raw_event_mutex);
563 pev = mipspmu->map_raw_event(event->attr.config);
564 } else {
565 /* The event type is not (yet) supported. */
566 return -EOPNOTSUPP;
567 }
568
569 if (IS_ERR(pev)) {
570 if (PERF_TYPE_RAW == event->attr.type)
571 mutex_unlock(&raw_event_mutex);
572 return PTR_ERR(pev);
573 }
574
575 /*
576 * We allow max flexibility on how each individual counter shared
577 * by the single CPU operates (the mode exclusion and the range).
578 */
579 hwc->config_base = M_PERFCTL_INTERRUPT_ENABLE;
580
581 /* Calculate range bits and validate it. */
582 if (num_possible_cpus() > 1)
583 check_and_calc_range(event, pev);
584
585 hwc->event_base = mipspmu_perf_event_encode(pev);
586 if (PERF_TYPE_RAW == event->attr.type)
587 mutex_unlock(&raw_event_mutex);
588
589 if (!attr->exclude_user)
590 hwc->config_base |= M_PERFCTL_USER;
591 if (!attr->exclude_kernel) {
592 hwc->config_base |= M_PERFCTL_KERNEL;
593 /* MIPS kernel mode: KSU == 00b || EXL == 1 || ERL == 1 */
594 hwc->config_base |= M_PERFCTL_EXL;
595 }
596 if (!attr->exclude_hv)
597 hwc->config_base |= M_PERFCTL_SUPERVISOR;
598
599 hwc->config_base &= M_PERFCTL_CONFIG_MASK;
600 /*
601 * The event can belong to another cpu. We do not assign a local
602 * counter for it for now.
603 */
604 hwc->idx = -1;
605 hwc->config = 0;
606
607 if (!hwc->sample_period) {
608 hwc->sample_period = MAX_PERIOD;
609 hwc->last_period = hwc->sample_period;
610 local64_set(&hwc->period_left, hwc->sample_period);
611 }
612
613 err = 0;
614 if (event->group_leader != event) {
615 err = validate_group(event);
616 if (err)
617 return -EINVAL;
618 }
619
620 event->destroy = hw_perf_event_destroy;
621
622 return err;
623 }
624
625 static void pause_local_counters(void)
626 {
627 struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
628 int counters = mipspmu->num_counters;
629 unsigned long flags;
630
631 local_irq_save(flags);
632 switch (counters) {
633 case 4:
634 cpuc->saved_ctrl[3] = r_c0_perfctrl3();
635 w_c0_perfctrl3(cpuc->saved_ctrl[3] &
636 ~M_PERFCTL_COUNT_EVENT_WHENEVER);
637 case 3:
638 cpuc->saved_ctrl[2] = r_c0_perfctrl2();
639 w_c0_perfctrl2(cpuc->saved_ctrl[2] &
640 ~M_PERFCTL_COUNT_EVENT_WHENEVER);
641 case 2:
642 cpuc->saved_ctrl[1] = r_c0_perfctrl1();
643 w_c0_perfctrl1(cpuc->saved_ctrl[1] &
644 ~M_PERFCTL_COUNT_EVENT_WHENEVER);
645 case 1:
646 cpuc->saved_ctrl[0] = r_c0_perfctrl0();
647 w_c0_perfctrl0(cpuc->saved_ctrl[0] &
648 ~M_PERFCTL_COUNT_EVENT_WHENEVER);
649 }
650 local_irq_restore(flags);
651 }
652
653 static void resume_local_counters(void)
654 {
655 struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
656 int counters = mipspmu->num_counters;
657 unsigned long flags;
658
659 local_irq_save(flags);
660 switch (counters) {
661 case 4:
662 w_c0_perfctrl3(cpuc->saved_ctrl[3]);
663 case 3:
664 w_c0_perfctrl2(cpuc->saved_ctrl[2]);
665 case 2:
666 w_c0_perfctrl1(cpuc->saved_ctrl[1]);
667 case 1:
668 w_c0_perfctrl0(cpuc->saved_ctrl[0]);
669 }
670 local_irq_restore(flags);
671 }
672
673 static int mipsxx_pmu_handle_shared_irq(void)
674 {
675 struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
676 struct perf_sample_data data;
677 unsigned int counters = mipspmu->num_counters;
678 unsigned int counter;
679 int handled = IRQ_NONE;
680 struct pt_regs *regs;
681
682 if (cpu_has_mips_r2 && !(read_c0_cause() & (1 << 26)))
683 return handled;
684
685 /*
686 * First we pause the local counters, so that when we are locked
687 * here, the counters are all paused. When it gets locked due to
688 * perf_disable(), the timer interrupt handler will be delayed.
689 *
690 * See also mipsxx_pmu_start().
691 */
692 pause_local_counters();
693 #ifdef CONFIG_MIPS_MT_SMP
694 read_lock(&pmuint_rwlock);
695 #endif
696
697 regs = get_irq_regs();
698
699 perf_sample_data_init(&data, 0);
700
701 switch (counters) {
702 #define HANDLE_COUNTER(n) \
703 case n + 1: \
704 if (test_bit(n, cpuc->used_mask)) { \
705 counter = r_c0_perfcntr ## n(); \
706 if (counter & M_COUNTER_OVERFLOW) { \
707 w_c0_perfcntr ## n(counter & \
708 VALID_COUNT); \
709 if (test_and_change_bit(n, cpuc->msbs)) \
710 handle_associated_event(cpuc, \
711 n, &data, regs); \
712 handled = IRQ_HANDLED; \
713 } \
714 }
715 HANDLE_COUNTER(3)
716 HANDLE_COUNTER(2)
717 HANDLE_COUNTER(1)
718 HANDLE_COUNTER(0)
719 }
720
721 /*
722 * Do all the work for the pending perf events. We can do this
723 * in here because the performance counter interrupt is a regular
724 * interrupt, not NMI.
725 */
726 if (handled == IRQ_HANDLED)
727 irq_work_run();
728
729 #ifdef CONFIG_MIPS_MT_SMP
730 read_unlock(&pmuint_rwlock);
731 #endif
732 resume_local_counters();
733 return handled;
734 }
735
736 static irqreturn_t
737 mipsxx_pmu_handle_irq(int irq, void *dev)
738 {
739 return mipsxx_pmu_handle_shared_irq();
740 }
741
742 static void mipsxx_pmu_start(void)
743 {
744 #ifdef CONFIG_MIPS_MT_SMP
745 write_unlock(&pmuint_rwlock);
746 #endif
747 resume_local_counters();
748 }
749
750 /*
751 * MIPS performance counters can be per-TC. The control registers can
752 * not be directly accessed across CPUs. Hence if we want to do global
753 * control, we need cross CPU calls. on_each_cpu() can help us, but we
754 * can not make sure this function is called with interrupts enabled. So
755 * here we pause local counters and then grab a rwlock and leave the
756 * counters on other CPUs alone. If any counter interrupt raises while
757 * we own the write lock, simply pause local counters on that CPU and
758 * spin in the handler. Also we know we won't be switched to another
759 * CPU after pausing local counters and before grabbing the lock.
760 */
761 static void mipsxx_pmu_stop(void)
762 {
763 pause_local_counters();
764 #ifdef CONFIG_MIPS_MT_SMP
765 write_lock(&pmuint_rwlock);
766 #endif
767 }
768
769 static int
770 mipsxx_pmu_alloc_counter(struct cpu_hw_events *cpuc,
771 struct hw_perf_event *hwc)
772 {
773 int i;
774
775 /*
776 * We only need to care the counter mask. The range has been
777 * checked definitely.
778 */
779 unsigned long cntr_mask = (hwc->event_base >> 8) & 0xffff;
780
781 for (i = mipspmu->num_counters - 1; i >= 0; i--) {
782 /*
783 * Note that some MIPS perf events can be counted by both
784 * even and odd counters, wheresas many other are only by
785 * even _or_ odd counters. This introduces an issue that
786 * when the former kind of event takes the counter the
787 * latter kind of event wants to use, then the "counter
788 * allocation" for the latter event will fail. In fact if
789 * they can be dynamically swapped, they both feel happy.
790 * But here we leave this issue alone for now.
791 */
792 if (test_bit(i, &cntr_mask) &&
793 !test_and_set_bit(i, cpuc->used_mask))
794 return i;
795 }
796
797 return -EAGAIN;
798 }
799
800 static void
801 mipsxx_pmu_enable_event(struct hw_perf_event *evt, int idx)
802 {
803 struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
804 unsigned long flags;
805
806 WARN_ON(idx < 0 || idx >= mipspmu->num_counters);
807
808 local_irq_save(flags);
809 cpuc->saved_ctrl[idx] = M_PERFCTL_EVENT(evt->event_base & 0xff) |
810 (evt->config_base & M_PERFCTL_CONFIG_MASK) |
811 /* Make sure interrupt enabled. */
812 M_PERFCTL_INTERRUPT_ENABLE;
813 /*
814 * We do not actually let the counter run. Leave it until start().
815 */
816 local_irq_restore(flags);
817 }
818
819 static void
820 mipsxx_pmu_disable_event(int idx)
821 {
822 struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
823 unsigned long flags;
824
825 WARN_ON(idx < 0 || idx >= mipspmu->num_counters);
826
827 local_irq_save(flags);
828 cpuc->saved_ctrl[idx] = mipsxx_pmu_read_control(idx) &
829 ~M_PERFCTL_COUNT_EVENT_WHENEVER;
830 mipsxx_pmu_write_control(idx, cpuc->saved_ctrl[idx]);
831 local_irq_restore(flags);
832 }
833
834 /* 24K */
835 #define IS_UNSUPPORTED_24K_EVENT(r, b) \
836 ((b) == 12 || (r) == 151 || (r) == 152 || (b) == 26 || \
837 (b) == 27 || (r) == 28 || (r) == 158 || (b) == 31 || \
838 (b) == 32 || (b) == 34 || (b) == 36 || (r) == 168 || \
839 (r) == 172 || (b) == 47 || ((b) >= 56 && (b) <= 63) || \
840 ((b) >= 68 && (b) <= 127))
841 #define IS_BOTH_COUNTERS_24K_EVENT(b) \
842 ((b) == 0 || (b) == 1 || (b) == 11)
843
844 /* 34K */
845 #define IS_UNSUPPORTED_34K_EVENT(r, b) \
846 ((b) == 12 || (r) == 27 || (r) == 158 || (b) == 36 || \
847 (b) == 38 || (r) == 175 || ((b) >= 56 && (b) <= 63) || \
848 ((b) >= 68 && (b) <= 127))
849 #define IS_BOTH_COUNTERS_34K_EVENT(b) \
850 ((b) == 0 || (b) == 1 || (b) == 11)
851 #ifdef CONFIG_MIPS_MT_SMP
852 #define IS_RANGE_P_34K_EVENT(r, b) \
853 ((b) == 0 || (r) == 18 || (b) == 21 || (b) == 22 || \
854 (b) == 25 || (b) == 39 || (r) == 44 || (r) == 174 || \
855 (r) == 176 || ((b) >= 50 && (b) <= 55) || \
856 ((b) >= 64 && (b) <= 67))
857 #define IS_RANGE_V_34K_EVENT(r) ((r) == 47)
858 #endif
859
860 /* 74K */
861 #define IS_UNSUPPORTED_74K_EVENT(r, b) \
862 ((r) == 5 || ((r) >= 135 && (r) <= 137) || \
863 ((b) >= 10 && (b) <= 12) || (b) == 22 || (b) == 27 || \
864 (b) == 33 || (b) == 34 || ((b) >= 47 && (b) <= 49) || \
865 (r) == 178 || (b) == 55 || (b) == 57 || (b) == 60 || \
866 (b) == 61 || (r) == 62 || (r) == 191 || \
867 ((b) >= 64 && (b) <= 127))
868 #define IS_BOTH_COUNTERS_74K_EVENT(b) \
869 ((b) == 0 || (b) == 1)
870
871 /* 1004K */
872 #define IS_UNSUPPORTED_1004K_EVENT(r, b) \
873 ((b) == 12 || (r) == 27 || (r) == 158 || (b) == 38 || \
874 (r) == 175 || (b) == 63 || ((b) >= 68 && (b) <= 127))
875 #define IS_BOTH_COUNTERS_1004K_EVENT(b) \
876 ((b) == 0 || (b) == 1 || (b) == 11)
877 #ifdef CONFIG_MIPS_MT_SMP
878 #define IS_RANGE_P_1004K_EVENT(r, b) \
879 ((b) == 0 || (r) == 18 || (b) == 21 || (b) == 22 || \
880 (b) == 25 || (b) == 36 || (b) == 39 || (r) == 44 || \
881 (r) == 174 || (r) == 176 || ((b) >= 50 && (b) <= 59) || \
882 (r) == 188 || (b) == 61 || (b) == 62 || \
883 ((b) >= 64 && (b) <= 67))
884 #define IS_RANGE_V_1004K_EVENT(r) ((r) == 47)
885 #endif
886
887 /*
888 * User can use 0-255 raw events, where 0-127 for the events of even
889 * counters, and 128-255 for odd counters. Note that bit 7 is used to
890 * indicate the parity. So, for example, when user wants to take the
891 * Event Num of 15 for odd counters (by referring to the user manual),
892 * then 128 needs to be added to 15 as the input for the event config,
893 * i.e., 143 (0x8F) to be used.
894 */
895 static const struct mips_perf_event *
896 mipsxx_pmu_map_raw_event(u64 config)
897 {
898 unsigned int raw_id = config & 0xff;
899 unsigned int base_id = raw_id & 0x7f;
900
901 switch (current_cpu_type()) {
902 case CPU_24K:
903 if (IS_UNSUPPORTED_24K_EVENT(raw_id, base_id))
904 return ERR_PTR(-EOPNOTSUPP);
905 raw_event.event_id = base_id;
906 if (IS_BOTH_COUNTERS_24K_EVENT(base_id))
907 raw_event.cntr_mask = CNTR_EVEN | CNTR_ODD;
908 else
909 raw_event.cntr_mask =
910 raw_id > 127 ? CNTR_ODD : CNTR_EVEN;
911 #ifdef CONFIG_MIPS_MT_SMP
912 /*
913 * This is actually doing nothing. Non-multithreading
914 * CPUs will not check and calculate the range.
915 */
916 raw_event.range = P;
917 #endif
918 break;
919 case CPU_34K:
920 if (IS_UNSUPPORTED_34K_EVENT(raw_id, base_id))
921 return ERR_PTR(-EOPNOTSUPP);
922 raw_event.event_id = base_id;
923 if (IS_BOTH_COUNTERS_34K_EVENT(base_id))
924 raw_event.cntr_mask = CNTR_EVEN | CNTR_ODD;
925 else
926 raw_event.cntr_mask =
927 raw_id > 127 ? CNTR_ODD : CNTR_EVEN;
928 #ifdef CONFIG_MIPS_MT_SMP
929 if (IS_RANGE_P_34K_EVENT(raw_id, base_id))
930 raw_event.range = P;
931 else if (unlikely(IS_RANGE_V_34K_EVENT(raw_id)))
932 raw_event.range = V;
933 else
934 raw_event.range = T;
935 #endif
936 break;
937 case CPU_74K:
938 if (IS_UNSUPPORTED_74K_EVENT(raw_id, base_id))
939 return ERR_PTR(-EOPNOTSUPP);
940 raw_event.event_id = base_id;
941 if (IS_BOTH_COUNTERS_74K_EVENT(base_id))
942 raw_event.cntr_mask = CNTR_EVEN | CNTR_ODD;
943 else
944 raw_event.cntr_mask =
945 raw_id > 127 ? CNTR_ODD : CNTR_EVEN;
946 #ifdef CONFIG_MIPS_MT_SMP
947 raw_event.range = P;
948 #endif
949 break;
950 case CPU_1004K:
951 if (IS_UNSUPPORTED_1004K_EVENT(raw_id, base_id))
952 return ERR_PTR(-EOPNOTSUPP);
953 raw_event.event_id = base_id;
954 if (IS_BOTH_COUNTERS_1004K_EVENT(base_id))
955 raw_event.cntr_mask = CNTR_EVEN | CNTR_ODD;
956 else
957 raw_event.cntr_mask =
958 raw_id > 127 ? CNTR_ODD : CNTR_EVEN;
959 #ifdef CONFIG_MIPS_MT_SMP
960 if (IS_RANGE_P_1004K_EVENT(raw_id, base_id))
961 raw_event.range = P;
962 else if (unlikely(IS_RANGE_V_1004K_EVENT(raw_id)))
963 raw_event.range = V;
964 else
965 raw_event.range = T;
966 #endif
967 break;
968 }
969
970 return &raw_event;
971 }
972
973 static struct mips_pmu mipsxxcore_pmu = {
974 .handle_irq = mipsxx_pmu_handle_irq,
975 .handle_shared_irq = mipsxx_pmu_handle_shared_irq,
976 .start = mipsxx_pmu_start,
977 .stop = mipsxx_pmu_stop,
978 .alloc_counter = mipsxx_pmu_alloc_counter,
979 .read_counter = mipsxx_pmu_read_counter,
980 .write_counter = mipsxx_pmu_write_counter,
981 .enable_event = mipsxx_pmu_enable_event,
982 .disable_event = mipsxx_pmu_disable_event,
983 .map_raw_event = mipsxx_pmu_map_raw_event,
984 .general_event_map = &mipsxxcore_event_map,
985 .cache_event_map = &mipsxxcore_cache_map,
986 };
987
988 static struct mips_pmu mipsxx74Kcore_pmu = {
989 .handle_irq = mipsxx_pmu_handle_irq,
990 .handle_shared_irq = mipsxx_pmu_handle_shared_irq,
991 .start = mipsxx_pmu_start,
992 .stop = mipsxx_pmu_stop,
993 .alloc_counter = mipsxx_pmu_alloc_counter,
994 .read_counter = mipsxx_pmu_read_counter,
995 .write_counter = mipsxx_pmu_write_counter,
996 .enable_event = mipsxx_pmu_enable_event,
997 .disable_event = mipsxx_pmu_disable_event,
998 .map_raw_event = mipsxx_pmu_map_raw_event,
999 .general_event_map = &mipsxx74Kcore_event_map,
1000 .cache_event_map = &mipsxx74Kcore_cache_map,
1001 };
1002
1003 static int __init
1004 init_hw_perf_events(void)
1005 {
1006 int counters, irq;
1007
1008 pr_info("Performance counters: ");
1009
1010 counters = n_counters();
1011 if (counters == 0) {
1012 pr_cont("No available PMU.\n");
1013 return -ENODEV;
1014 }
1015
1016 #ifdef CONFIG_MIPS_MT_SMP
1017 cpu_has_mipsmt_pertccounters = read_c0_config7() & (1<<19);
1018 if (!cpu_has_mipsmt_pertccounters)
1019 counters = counters_total_to_per_cpu(counters);
1020 #endif
1021
1022 #ifdef MSC01E_INT_BASE
1023 if (cpu_has_veic) {
1024 /*
1025 * Using platform specific interrupt controller defines.
1026 */
1027 irq = MSC01E_INT_BASE + MSC01E_INT_PERFCTR;
1028 } else {
1029 #endif
1030 if (cp0_perfcount_irq >= 0)
1031 irq = MIPS_CPU_IRQ_BASE + cp0_perfcount_irq;
1032 else
1033 irq = -1;
1034 #ifdef MSC01E_INT_BASE
1035 }
1036 #endif
1037
1038 on_each_cpu(reset_counters, (void *)(long)counters, 1);
1039
1040 switch (current_cpu_type()) {
1041 case CPU_24K:
1042 mipsxxcore_pmu.name = "mips/24K";
1043 mipsxxcore_pmu.num_counters = counters;
1044 mipsxxcore_pmu.irq = irq;
1045 mipspmu = &mipsxxcore_pmu;
1046 break;
1047 case CPU_34K:
1048 mipsxxcore_pmu.name = "mips/34K";
1049 mipsxxcore_pmu.num_counters = counters;
1050 mipsxxcore_pmu.irq = irq;
1051 mipspmu = &mipsxxcore_pmu;
1052 break;
1053 case CPU_74K:
1054 mipsxx74Kcore_pmu.name = "mips/74K";
1055 mipsxx74Kcore_pmu.num_counters = counters;
1056 mipsxx74Kcore_pmu.irq = irq;
1057 mipspmu = &mipsxx74Kcore_pmu;
1058 break;
1059 case CPU_1004K:
1060 mipsxxcore_pmu.name = "mips/1004K";
1061 mipsxxcore_pmu.num_counters = counters;
1062 mipsxxcore_pmu.irq = irq;
1063 mipspmu = &mipsxxcore_pmu;
1064 break;
1065 default:
1066 pr_cont("Either hardware does not support performance "
1067 "counters, or not yet implemented.\n");
1068 return -ENODEV;
1069 }
1070
1071 if (mipspmu)
1072 pr_cont("%s PMU enabled, %d counters available to each "
1073 "CPU, irq %d%s\n", mipspmu->name, counters, irq,
1074 irq < 0 ? " (share with timer interrupt)" : "");
1075
1076 perf_pmu_register(&pmu, "cpu", PERF_TYPE_RAW);
1077
1078 return 0;
1079 }
1080 early_initcall(init_hw_perf_events);
1081
1082 #endif /* defined(CONFIG_CPU_MIPS32)... */
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