1 /*
2 * APM X-Gene SoC PMU (Performance Monitor Unit)
3 *
4 * Copyright (c) 2016, Applied Micro Circuits Corporation
5 * Author: Hoan Tran <hotran@apm.com>
6 * Tai Nguyen <ttnguyen@apm.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include <linux/acpi.h>
23 #include <linux/clk.h>
24 #include <linux/cpumask.h>
25 #include <linux/interrupt.h>
26 #include <linux/io.h>
27 #include <linux/mfd/syscon.h>
28 #include <linux/module.h>
29 #include <linux/of_address.h>
30 #include <linux/of_fdt.h>
31 #include <linux/of_irq.h>
32 #include <linux/of_platform.h>
33 #include <linux/perf_event.h>
34 #include <linux/platform_device.h>
35 #include <linux/regmap.h>
36 #include <linux/slab.h>
37
38 #define CSW_CSWCR 0x0000
39 #define CSW_CSWCR_DUALMCB_MASK BIT(0)
40 #define CSW_CSWCR_MCB0_ROUTING(x) (((x) & 0x0C) >> 2)
41 #define CSW_CSWCR_MCB1_ROUTING(x) (((x) & 0x30) >> 4)
42 #define MCBADDRMR 0x0000
43 #define MCBADDRMR_DUALMCU_MODE_MASK BIT(2)
44
45 #define PCPPMU_INTSTATUS_REG 0x000
46 #define PCPPMU_INTMASK_REG 0x004
47 #define PCPPMU_INTMASK 0x0000000F
48 #define PCPPMU_INTENMASK 0xFFFFFFFF
49 #define PCPPMU_INTCLRMASK 0xFFFFFFF0
50 #define PCPPMU_INT_MCU BIT(0)
51 #define PCPPMU_INT_MCB BIT(1)
52 #define PCPPMU_INT_L3C BIT(2)
53 #define PCPPMU_INT_IOB BIT(3)
54
55 #define PCPPMU_V3_INTMASK 0x00FF33FF
56 #define PCPPMU_V3_INTENMASK 0xFFFFFFFF
57 #define PCPPMU_V3_INTCLRMASK 0xFF00CC00
58 #define PCPPMU_V3_INT_MCU 0x000000FF
59 #define PCPPMU_V3_INT_MCB 0x00000300
60 #define PCPPMU_V3_INT_L3C 0x00FF0000
61 #define PCPPMU_V3_INT_IOB 0x00003000
62
63 #define PMU_MAX_COUNTERS 4
64 #define PMU_CNT_MAX_PERIOD 0xFFFFFFFFULL
65 #define PMU_V3_CNT_MAX_PERIOD 0xFFFFFFFFFFFFFFFFULL
66 #define PMU_OVERFLOW_MASK 0xF
67 #define PMU_PMCR_E BIT(0)
68 #define PMU_PMCR_P BIT(1)
69
70 #define PMU_PMEVCNTR0 0x000
71 #define PMU_PMEVCNTR1 0x004
72 #define PMU_PMEVCNTR2 0x008
73 #define PMU_PMEVCNTR3 0x00C
74 #define PMU_PMEVTYPER0 0x400
75 #define PMU_PMEVTYPER1 0x404
76 #define PMU_PMEVTYPER2 0x408
77 #define PMU_PMEVTYPER3 0x40C
78 #define PMU_PMAMR0 0xA00
79 #define PMU_PMAMR1 0xA04
80 #define PMU_PMCNTENSET 0xC00
81 #define PMU_PMCNTENCLR 0xC20
82 #define PMU_PMINTENSET 0xC40
83 #define PMU_PMINTENCLR 0xC60
84 #define PMU_PMOVSR 0xC80
85 #define PMU_PMCR 0xE04
86
87 /* PMU registers for V3 */
88 #define PMU_PMOVSCLR 0xC80
89 #define PMU_PMOVSSET 0xCC0
90
91 #define to_pmu_dev(p) container_of(p, struct xgene_pmu_dev, pmu)
92 #define GET_CNTR(ev) (ev->hw.idx)
93 #define GET_EVENTID(ev) (ev->hw.config & 0xFFULL)
94 #define GET_AGENTID(ev) (ev->hw.config_base & 0xFFFFFFFFUL)
95 #define GET_AGENT1ID(ev) ((ev->hw.config_base >> 32) & 0xFFFFFFFFUL)
96
97 struct hw_pmu_info {
98 u32 type;
99 u32 enable_mask;
100 void __iomem *csr;
101 };
102
103 struct xgene_pmu_dev {
104 struct hw_pmu_info *inf;
105 struct xgene_pmu *parent;
106 struct pmu pmu;
107 u8 max_counters;
108 DECLARE_BITMAP(cntr_assign_mask, PMU_MAX_COUNTERS);
109 u64 max_period;
110 const struct attribute_group **attr_groups;
111 struct perf_event *pmu_counter_event[PMU_MAX_COUNTERS];
112 };
113
114 struct xgene_pmu_ops {
115 void (*mask_int)(struct xgene_pmu *pmu);
116 void (*unmask_int)(struct xgene_pmu *pmu);
117 u64 (*read_counter)(struct xgene_pmu_dev *pmu, int idx);
118 void (*write_counter)(struct xgene_pmu_dev *pmu, int idx, u64 val);
119 void (*write_evttype)(struct xgene_pmu_dev *pmu_dev, int idx, u32 val);
120 void (*write_agentmsk)(struct xgene_pmu_dev *pmu_dev, u32 val);
121 void (*write_agent1msk)(struct xgene_pmu_dev *pmu_dev, u32 val);
122 void (*enable_counter)(struct xgene_pmu_dev *pmu_dev, int idx);
123 void (*disable_counter)(struct xgene_pmu_dev *pmu_dev, int idx);
124 void (*enable_counter_int)(struct xgene_pmu_dev *pmu_dev, int idx);
125 void (*disable_counter_int)(struct xgene_pmu_dev *pmu_dev, int idx);
126 void (*reset_counters)(struct xgene_pmu_dev *pmu_dev);
127 void (*start_counters)(struct xgene_pmu_dev *pmu_dev);
128 void (*stop_counters)(struct xgene_pmu_dev *pmu_dev);
129 };
130
131 struct xgene_pmu {
132 struct device *dev;
133 int version;
134 void __iomem *pcppmu_csr;
135 u32 mcb_active_mask;
136 u32 mc_active_mask;
137 u32 l3c_active_mask;
138 cpumask_t cpu;
139 raw_spinlock_t lock;
140 const struct xgene_pmu_ops *ops;
141 struct list_head l3cpmus;
142 struct list_head iobpmus;
143 struct list_head mcbpmus;
144 struct list_head mcpmus;
145 };
146
147 struct xgene_pmu_dev_ctx {
148 char *name;
149 struct list_head next;
150 struct xgene_pmu_dev *pmu_dev;
151 struct hw_pmu_info inf;
152 };
153
154 struct xgene_pmu_data {
155 int id;
156 u32 data;
157 };
158
159 enum xgene_pmu_version {
160 PCP_PMU_V1 = 1,
161 PCP_PMU_V2,
162 PCP_PMU_V3,
163 };
164
165 enum xgene_pmu_dev_type {
166 PMU_TYPE_L3C = 0,
167 PMU_TYPE_IOB,
168 PMU_TYPE_IOB_SLOW,
169 PMU_TYPE_MCB,
170 PMU_TYPE_MC,
171 };
172
173 /*
174 * sysfs format attributes
175 */
xgene_pmu_format_show(struct device * dev,struct device_attribute * attr,char * buf)176 static ssize_t xgene_pmu_format_show(struct device *dev,
177 struct device_attribute *attr, char *buf)
178 {
179 struct dev_ext_attribute *eattr;
180
181 eattr = container_of(attr, struct dev_ext_attribute, attr);
182 return sprintf(buf, "%s\n", (char *) eattr->var);
183 }
184
185 #define XGENE_PMU_FORMAT_ATTR(_name, _config) \
186 (&((struct dev_ext_attribute[]) { \
187 { .attr = __ATTR(_name, S_IRUGO, xgene_pmu_format_show, NULL), \
188 .var = (void *) _config, } \
189 })[0].attr.attr)
190
191 static struct attribute *l3c_pmu_format_attrs[] = {
192 XGENE_PMU_FORMAT_ATTR(l3c_eventid, "config:0-7"),
193 XGENE_PMU_FORMAT_ATTR(l3c_agentid, "config1:0-9"),
194 NULL,
195 };
196
197 static struct attribute *iob_pmu_format_attrs[] = {
198 XGENE_PMU_FORMAT_ATTR(iob_eventid, "config:0-7"),
199 XGENE_PMU_FORMAT_ATTR(iob_agentid, "config1:0-63"),
200 NULL,
201 };
202
203 static struct attribute *mcb_pmu_format_attrs[] = {
204 XGENE_PMU_FORMAT_ATTR(mcb_eventid, "config:0-5"),
205 XGENE_PMU_FORMAT_ATTR(mcb_agentid, "config1:0-9"),
206 NULL,
207 };
208
209 static struct attribute *mc_pmu_format_attrs[] = {
210 XGENE_PMU_FORMAT_ATTR(mc_eventid, "config:0-28"),
211 NULL,
212 };
213
214 static const struct attribute_group l3c_pmu_format_attr_group = {
215 .name = "format",
216 .attrs = l3c_pmu_format_attrs,
217 };
218
219 static const struct attribute_group iob_pmu_format_attr_group = {
220 .name = "format",
221 .attrs = iob_pmu_format_attrs,
222 };
223
224 static const struct attribute_group mcb_pmu_format_attr_group = {
225 .name = "format",
226 .attrs = mcb_pmu_format_attrs,
227 };
228
229 static const struct attribute_group mc_pmu_format_attr_group = {
230 .name = "format",
231 .attrs = mc_pmu_format_attrs,
232 };
233
234 static struct attribute *l3c_pmu_v3_format_attrs[] = {
235 XGENE_PMU_FORMAT_ATTR(l3c_eventid, "config:0-39"),
236 NULL,
237 };
238
239 static struct attribute *iob_pmu_v3_format_attrs[] = {
240 XGENE_PMU_FORMAT_ATTR(iob_eventid, "config:0-47"),
241 NULL,
242 };
243
244 static struct attribute *iob_slow_pmu_v3_format_attrs[] = {
245 XGENE_PMU_FORMAT_ATTR(iob_slow_eventid, "config:0-16"),
246 NULL,
247 };
248
249 static struct attribute *mcb_pmu_v3_format_attrs[] = {
250 XGENE_PMU_FORMAT_ATTR(mcb_eventid, "config:0-35"),
251 NULL,
252 };
253
254 static struct attribute *mc_pmu_v3_format_attrs[] = {
255 XGENE_PMU_FORMAT_ATTR(mc_eventid, "config:0-44"),
256 NULL,
257 };
258
259 static const struct attribute_group l3c_pmu_v3_format_attr_group = {
260 .name = "format",
261 .attrs = l3c_pmu_v3_format_attrs,
262 };
263
264 static const struct attribute_group iob_pmu_v3_format_attr_group = {
265 .name = "format",
266 .attrs = iob_pmu_v3_format_attrs,
267 };
268
269 static const struct attribute_group iob_slow_pmu_v3_format_attr_group = {
270 .name = "format",
271 .attrs = iob_slow_pmu_v3_format_attrs,
272 };
273
274 static const struct attribute_group mcb_pmu_v3_format_attr_group = {
275 .name = "format",
276 .attrs = mcb_pmu_v3_format_attrs,
277 };
278
279 static const struct attribute_group mc_pmu_v3_format_attr_group = {
280 .name = "format",
281 .attrs = mc_pmu_v3_format_attrs,
282 };
283
284 /*
285 * sysfs event attributes
286 */
xgene_pmu_event_show(struct device * dev,struct device_attribute * attr,char * buf)287 static ssize_t xgene_pmu_event_show(struct device *dev,
288 struct device_attribute *attr, char *buf)
289 {
290 struct dev_ext_attribute *eattr;
291
292 eattr = container_of(attr, struct dev_ext_attribute, attr);
293 return sprintf(buf, "config=0x%lx\n", (unsigned long) eattr->var);
294 }
295
296 #define XGENE_PMU_EVENT_ATTR(_name, _config) \
297 (&((struct dev_ext_attribute[]) { \
298 { .attr = __ATTR(_name, S_IRUGO, xgene_pmu_event_show, NULL), \
299 .var = (void *) _config, } \
300 })[0].attr.attr)
301
302 static struct attribute *l3c_pmu_events_attrs[] = {
303 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
304 XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01),
305 XGENE_PMU_EVENT_ATTR(read-hit, 0x02),
306 XGENE_PMU_EVENT_ATTR(read-miss, 0x03),
307 XGENE_PMU_EVENT_ATTR(write-need-replacement, 0x06),
308 XGENE_PMU_EVENT_ATTR(write-not-need-replacement, 0x07),
309 XGENE_PMU_EVENT_ATTR(tq-full, 0x08),
310 XGENE_PMU_EVENT_ATTR(ackq-full, 0x09),
311 XGENE_PMU_EVENT_ATTR(wdb-full, 0x0a),
312 XGENE_PMU_EVENT_ATTR(bank-fifo-full, 0x0b),
313 XGENE_PMU_EVENT_ATTR(odb-full, 0x0c),
314 XGENE_PMU_EVENT_ATTR(wbq-full, 0x0d),
315 XGENE_PMU_EVENT_ATTR(bank-conflict-fifo-issue, 0x0e),
316 XGENE_PMU_EVENT_ATTR(bank-fifo-issue, 0x0f),
317 NULL,
318 };
319
320 static struct attribute *iob_pmu_events_attrs[] = {
321 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
322 XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01),
323 XGENE_PMU_EVENT_ATTR(axi0-read, 0x02),
324 XGENE_PMU_EVENT_ATTR(axi0-read-partial, 0x03),
325 XGENE_PMU_EVENT_ATTR(axi1-read, 0x04),
326 XGENE_PMU_EVENT_ATTR(axi1-read-partial, 0x05),
327 XGENE_PMU_EVENT_ATTR(csw-read-block, 0x06),
328 XGENE_PMU_EVENT_ATTR(csw-read-partial, 0x07),
329 XGENE_PMU_EVENT_ATTR(axi0-write, 0x10),
330 XGENE_PMU_EVENT_ATTR(axi0-write-partial, 0x11),
331 XGENE_PMU_EVENT_ATTR(axi1-write, 0x13),
332 XGENE_PMU_EVENT_ATTR(axi1-write-partial, 0x14),
333 XGENE_PMU_EVENT_ATTR(csw-inbound-dirty, 0x16),
334 NULL,
335 };
336
337 static struct attribute *mcb_pmu_events_attrs[] = {
338 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
339 XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01),
340 XGENE_PMU_EVENT_ATTR(csw-read, 0x02),
341 XGENE_PMU_EVENT_ATTR(csw-write-request, 0x03),
342 XGENE_PMU_EVENT_ATTR(mcb-csw-stall, 0x04),
343 XGENE_PMU_EVENT_ATTR(cancel-read-gack, 0x05),
344 NULL,
345 };
346
347 static struct attribute *mc_pmu_events_attrs[] = {
348 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
349 XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01),
350 XGENE_PMU_EVENT_ATTR(act-cmd-sent, 0x02),
351 XGENE_PMU_EVENT_ATTR(pre-cmd-sent, 0x03),
352 XGENE_PMU_EVENT_ATTR(rd-cmd-sent, 0x04),
353 XGENE_PMU_EVENT_ATTR(rda-cmd-sent, 0x05),
354 XGENE_PMU_EVENT_ATTR(wr-cmd-sent, 0x06),
355 XGENE_PMU_EVENT_ATTR(wra-cmd-sent, 0x07),
356 XGENE_PMU_EVENT_ATTR(pde-cmd-sent, 0x08),
357 XGENE_PMU_EVENT_ATTR(sre-cmd-sent, 0x09),
358 XGENE_PMU_EVENT_ATTR(prea-cmd-sent, 0x0a),
359 XGENE_PMU_EVENT_ATTR(ref-cmd-sent, 0x0b),
360 XGENE_PMU_EVENT_ATTR(rd-rda-cmd-sent, 0x0c),
361 XGENE_PMU_EVENT_ATTR(wr-wra-cmd-sent, 0x0d),
362 XGENE_PMU_EVENT_ATTR(in-rd-collision, 0x0e),
363 XGENE_PMU_EVENT_ATTR(in-wr-collision, 0x0f),
364 XGENE_PMU_EVENT_ATTR(collision-queue-not-empty, 0x10),
365 XGENE_PMU_EVENT_ATTR(collision-queue-full, 0x11),
366 XGENE_PMU_EVENT_ATTR(mcu-request, 0x12),
367 XGENE_PMU_EVENT_ATTR(mcu-rd-request, 0x13),
368 XGENE_PMU_EVENT_ATTR(mcu-hp-rd-request, 0x14),
369 XGENE_PMU_EVENT_ATTR(mcu-wr-request, 0x15),
370 XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-all, 0x16),
371 XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-cancel, 0x17),
372 XGENE_PMU_EVENT_ATTR(mcu-rd-response, 0x18),
373 XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-speculative-all, 0x19),
374 XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-speculative-cancel, 0x1a),
375 XGENE_PMU_EVENT_ATTR(mcu-wr-proceed-all, 0x1b),
376 XGENE_PMU_EVENT_ATTR(mcu-wr-proceed-cancel, 0x1c),
377 NULL,
378 };
379
380 static const struct attribute_group l3c_pmu_events_attr_group = {
381 .name = "events",
382 .attrs = l3c_pmu_events_attrs,
383 };
384
385 static const struct attribute_group iob_pmu_events_attr_group = {
386 .name = "events",
387 .attrs = iob_pmu_events_attrs,
388 };
389
390 static const struct attribute_group mcb_pmu_events_attr_group = {
391 .name = "events",
392 .attrs = mcb_pmu_events_attrs,
393 };
394
395 static const struct attribute_group mc_pmu_events_attr_group = {
396 .name = "events",
397 .attrs = mc_pmu_events_attrs,
398 };
399
400 static struct attribute *l3c_pmu_v3_events_attrs[] = {
401 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
402 XGENE_PMU_EVENT_ATTR(read-hit, 0x01),
403 XGENE_PMU_EVENT_ATTR(read-miss, 0x02),
404 XGENE_PMU_EVENT_ATTR(index-flush-eviction, 0x03),
405 XGENE_PMU_EVENT_ATTR(write-caused-replacement, 0x04),
406 XGENE_PMU_EVENT_ATTR(write-not-caused-replacement, 0x05),
407 XGENE_PMU_EVENT_ATTR(clean-eviction, 0x06),
408 XGENE_PMU_EVENT_ATTR(dirty-eviction, 0x07),
409 XGENE_PMU_EVENT_ATTR(read, 0x08),
410 XGENE_PMU_EVENT_ATTR(write, 0x09),
411 XGENE_PMU_EVENT_ATTR(request, 0x0a),
412 XGENE_PMU_EVENT_ATTR(tq-bank-conflict-issue-stall, 0x0b),
413 XGENE_PMU_EVENT_ATTR(tq-full, 0x0c),
414 XGENE_PMU_EVENT_ATTR(ackq-full, 0x0d),
415 XGENE_PMU_EVENT_ATTR(wdb-full, 0x0e),
416 XGENE_PMU_EVENT_ATTR(odb-full, 0x10),
417 XGENE_PMU_EVENT_ATTR(wbq-full, 0x11),
418 XGENE_PMU_EVENT_ATTR(input-req-async-fifo-stall, 0x12),
419 XGENE_PMU_EVENT_ATTR(output-req-async-fifo-stall, 0x13),
420 XGENE_PMU_EVENT_ATTR(output-data-async-fifo-stall, 0x14),
421 XGENE_PMU_EVENT_ATTR(total-insertion, 0x15),
422 XGENE_PMU_EVENT_ATTR(sip-insertions-r-set, 0x16),
423 XGENE_PMU_EVENT_ATTR(sip-insertions-r-clear, 0x17),
424 XGENE_PMU_EVENT_ATTR(dip-insertions-r-set, 0x18),
425 XGENE_PMU_EVENT_ATTR(dip-insertions-r-clear, 0x19),
426 XGENE_PMU_EVENT_ATTR(dip-insertions-force-r-set, 0x1a),
427 XGENE_PMU_EVENT_ATTR(egression, 0x1b),
428 XGENE_PMU_EVENT_ATTR(replacement, 0x1c),
429 XGENE_PMU_EVENT_ATTR(old-replacement, 0x1d),
430 XGENE_PMU_EVENT_ATTR(young-replacement, 0x1e),
431 XGENE_PMU_EVENT_ATTR(r-set-replacement, 0x1f),
432 XGENE_PMU_EVENT_ATTR(r-clear-replacement, 0x20),
433 XGENE_PMU_EVENT_ATTR(old-r-replacement, 0x21),
434 XGENE_PMU_EVENT_ATTR(old-nr-replacement, 0x22),
435 XGENE_PMU_EVENT_ATTR(young-r-replacement, 0x23),
436 XGENE_PMU_EVENT_ATTR(young-nr-replacement, 0x24),
437 XGENE_PMU_EVENT_ATTR(bloomfilter-clearing, 0x25),
438 XGENE_PMU_EVENT_ATTR(generation-flip, 0x26),
439 XGENE_PMU_EVENT_ATTR(vcc-droop-detected, 0x27),
440 NULL,
441 };
442
443 static struct attribute *iob_fast_pmu_v3_events_attrs[] = {
444 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
445 XGENE_PMU_EVENT_ATTR(pa-req-buf-alloc-all, 0x01),
446 XGENE_PMU_EVENT_ATTR(pa-req-buf-alloc-rd, 0x02),
447 XGENE_PMU_EVENT_ATTR(pa-req-buf-alloc-wr, 0x03),
448 XGENE_PMU_EVENT_ATTR(pa-all-cp-req, 0x04),
449 XGENE_PMU_EVENT_ATTR(pa-cp-blk-req, 0x05),
450 XGENE_PMU_EVENT_ATTR(pa-cp-ptl-req, 0x06),
451 XGENE_PMU_EVENT_ATTR(pa-cp-rd-req, 0x07),
452 XGENE_PMU_EVENT_ATTR(pa-cp-wr-req, 0x08),
453 XGENE_PMU_EVENT_ATTR(ba-all-req, 0x09),
454 XGENE_PMU_EVENT_ATTR(ba-rd-req, 0x0a),
455 XGENE_PMU_EVENT_ATTR(ba-wr-req, 0x0b),
456 XGENE_PMU_EVENT_ATTR(pa-rd-shared-req-issued, 0x10),
457 XGENE_PMU_EVENT_ATTR(pa-rd-exclusive-req-issued, 0x11),
458 XGENE_PMU_EVENT_ATTR(pa-wr-invalidate-req-issued-stashable, 0x12),
459 XGENE_PMU_EVENT_ATTR(pa-wr-invalidate-req-issued-nonstashable, 0x13),
460 XGENE_PMU_EVENT_ATTR(pa-wr-back-req-issued-stashable, 0x14),
461 XGENE_PMU_EVENT_ATTR(pa-wr-back-req-issued-nonstashable, 0x15),
462 XGENE_PMU_EVENT_ATTR(pa-ptl-wr-req, 0x16),
463 XGENE_PMU_EVENT_ATTR(pa-ptl-rd-req, 0x17),
464 XGENE_PMU_EVENT_ATTR(pa-wr-back-clean-data, 0x18),
465 XGENE_PMU_EVENT_ATTR(pa-wr-back-cancelled-on-SS, 0x1b),
466 XGENE_PMU_EVENT_ATTR(pa-barrier-occurrence, 0x1c),
467 XGENE_PMU_EVENT_ATTR(pa-barrier-cycles, 0x1d),
468 XGENE_PMU_EVENT_ATTR(pa-total-cp-snoops, 0x20),
469 XGENE_PMU_EVENT_ATTR(pa-rd-shared-snoop, 0x21),
470 XGENE_PMU_EVENT_ATTR(pa-rd-shared-snoop-hit, 0x22),
471 XGENE_PMU_EVENT_ATTR(pa-rd-exclusive-snoop, 0x23),
472 XGENE_PMU_EVENT_ATTR(pa-rd-exclusive-snoop-hit, 0x24),
473 XGENE_PMU_EVENT_ATTR(pa-rd-wr-invalid-snoop, 0x25),
474 XGENE_PMU_EVENT_ATTR(pa-rd-wr-invalid-snoop-hit, 0x26),
475 XGENE_PMU_EVENT_ATTR(pa-req-buffer-full, 0x28),
476 XGENE_PMU_EVENT_ATTR(cswlf-outbound-req-fifo-full, 0x29),
477 XGENE_PMU_EVENT_ATTR(cswlf-inbound-snoop-fifo-backpressure, 0x2a),
478 XGENE_PMU_EVENT_ATTR(cswlf-outbound-lack-fifo-full, 0x2b),
479 XGENE_PMU_EVENT_ATTR(cswlf-inbound-gack-fifo-backpressure, 0x2c),
480 XGENE_PMU_EVENT_ATTR(cswlf-outbound-data-fifo-full, 0x2d),
481 XGENE_PMU_EVENT_ATTR(cswlf-inbound-data-fifo-backpressure, 0x2e),
482 XGENE_PMU_EVENT_ATTR(cswlf-inbound-req-backpressure, 0x2f),
483 NULL,
484 };
485
486 static struct attribute *iob_slow_pmu_v3_events_attrs[] = {
487 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
488 XGENE_PMU_EVENT_ATTR(pa-axi0-rd-req, 0x01),
489 XGENE_PMU_EVENT_ATTR(pa-axi0-wr-req, 0x02),
490 XGENE_PMU_EVENT_ATTR(pa-axi1-rd-req, 0x03),
491 XGENE_PMU_EVENT_ATTR(pa-axi1-wr-req, 0x04),
492 XGENE_PMU_EVENT_ATTR(ba-all-axi-req, 0x07),
493 XGENE_PMU_EVENT_ATTR(ba-axi-rd-req, 0x08),
494 XGENE_PMU_EVENT_ATTR(ba-axi-wr-req, 0x09),
495 XGENE_PMU_EVENT_ATTR(ba-free-list-empty, 0x10),
496 NULL,
497 };
498
499 static struct attribute *mcb_pmu_v3_events_attrs[] = {
500 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
501 XGENE_PMU_EVENT_ATTR(req-receive, 0x01),
502 XGENE_PMU_EVENT_ATTR(rd-req-recv, 0x02),
503 XGENE_PMU_EVENT_ATTR(rd-req-recv-2, 0x03),
504 XGENE_PMU_EVENT_ATTR(wr-req-recv, 0x04),
505 XGENE_PMU_EVENT_ATTR(wr-req-recv-2, 0x05),
506 XGENE_PMU_EVENT_ATTR(rd-req-sent-to-mcu, 0x06),
507 XGENE_PMU_EVENT_ATTR(rd-req-sent-to-mcu-2, 0x07),
508 XGENE_PMU_EVENT_ATTR(rd-req-sent-to-spec-mcu, 0x08),
509 XGENE_PMU_EVENT_ATTR(rd-req-sent-to-spec-mcu-2, 0x09),
510 XGENE_PMU_EVENT_ATTR(glbl-ack-recv-for-rd-sent-to-spec-mcu, 0x0a),
511 XGENE_PMU_EVENT_ATTR(glbl-ack-go-recv-for-rd-sent-to-spec-mcu, 0x0b),
512 XGENE_PMU_EVENT_ATTR(glbl-ack-nogo-recv-for-rd-sent-to-spec-mcu, 0x0c),
513 XGENE_PMU_EVENT_ATTR(glbl-ack-go-recv-any-rd-req, 0x0d),
514 XGENE_PMU_EVENT_ATTR(glbl-ack-go-recv-any-rd-req-2, 0x0e),
515 XGENE_PMU_EVENT_ATTR(wr-req-sent-to-mcu, 0x0f),
516 XGENE_PMU_EVENT_ATTR(gack-recv, 0x10),
517 XGENE_PMU_EVENT_ATTR(rd-gack-recv, 0x11),
518 XGENE_PMU_EVENT_ATTR(wr-gack-recv, 0x12),
519 XGENE_PMU_EVENT_ATTR(cancel-rd-gack, 0x13),
520 XGENE_PMU_EVENT_ATTR(cancel-wr-gack, 0x14),
521 XGENE_PMU_EVENT_ATTR(mcb-csw-req-stall, 0x15),
522 XGENE_PMU_EVENT_ATTR(mcu-req-intf-blocked, 0x16),
523 XGENE_PMU_EVENT_ATTR(mcb-mcu-rd-intf-stall, 0x17),
524 XGENE_PMU_EVENT_ATTR(csw-rd-intf-blocked, 0x18),
525 XGENE_PMU_EVENT_ATTR(csw-local-ack-intf-blocked, 0x19),
526 XGENE_PMU_EVENT_ATTR(mcu-req-table-full, 0x1a),
527 XGENE_PMU_EVENT_ATTR(mcu-stat-table-full, 0x1b),
528 XGENE_PMU_EVENT_ATTR(mcu-wr-table-full, 0x1c),
529 XGENE_PMU_EVENT_ATTR(mcu-rdreceipt-resp, 0x1d),
530 XGENE_PMU_EVENT_ATTR(mcu-wrcomplete-resp, 0x1e),
531 XGENE_PMU_EVENT_ATTR(mcu-retryack-resp, 0x1f),
532 XGENE_PMU_EVENT_ATTR(mcu-pcrdgrant-resp, 0x20),
533 XGENE_PMU_EVENT_ATTR(mcu-req-from-lastload, 0x21),
534 XGENE_PMU_EVENT_ATTR(mcu-req-from-bypass, 0x22),
535 XGENE_PMU_EVENT_ATTR(volt-droop-detect, 0x23),
536 NULL,
537 };
538
539 static struct attribute *mc_pmu_v3_events_attrs[] = {
540 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
541 XGENE_PMU_EVENT_ATTR(act-sent, 0x01),
542 XGENE_PMU_EVENT_ATTR(pre-sent, 0x02),
543 XGENE_PMU_EVENT_ATTR(rd-sent, 0x03),
544 XGENE_PMU_EVENT_ATTR(rda-sent, 0x04),
545 XGENE_PMU_EVENT_ATTR(wr-sent, 0x05),
546 XGENE_PMU_EVENT_ATTR(wra-sent, 0x06),
547 XGENE_PMU_EVENT_ATTR(pd-entry-vld, 0x07),
548 XGENE_PMU_EVENT_ATTR(sref-entry-vld, 0x08),
549 XGENE_PMU_EVENT_ATTR(prea-sent, 0x09),
550 XGENE_PMU_EVENT_ATTR(ref-sent, 0x0a),
551 XGENE_PMU_EVENT_ATTR(rd-rda-sent, 0x0b),
552 XGENE_PMU_EVENT_ATTR(wr-wra-sent, 0x0c),
553 XGENE_PMU_EVENT_ATTR(raw-hazard, 0x0d),
554 XGENE_PMU_EVENT_ATTR(war-hazard, 0x0e),
555 XGENE_PMU_EVENT_ATTR(waw-hazard, 0x0f),
556 XGENE_PMU_EVENT_ATTR(rar-hazard, 0x10),
557 XGENE_PMU_EVENT_ATTR(raw-war-waw-hazard, 0x11),
558 XGENE_PMU_EVENT_ATTR(hprd-lprd-wr-req-vld, 0x12),
559 XGENE_PMU_EVENT_ATTR(lprd-req-vld, 0x13),
560 XGENE_PMU_EVENT_ATTR(hprd-req-vld, 0x14),
561 XGENE_PMU_EVENT_ATTR(hprd-lprd-req-vld, 0x15),
562 XGENE_PMU_EVENT_ATTR(wr-req-vld, 0x16),
563 XGENE_PMU_EVENT_ATTR(partial-wr-req-vld, 0x17),
564 XGENE_PMU_EVENT_ATTR(rd-retry, 0x18),
565 XGENE_PMU_EVENT_ATTR(wr-retry, 0x19),
566 XGENE_PMU_EVENT_ATTR(retry-gnt, 0x1a),
567 XGENE_PMU_EVENT_ATTR(rank-change, 0x1b),
568 XGENE_PMU_EVENT_ATTR(dir-change, 0x1c),
569 XGENE_PMU_EVENT_ATTR(rank-dir-change, 0x1d),
570 XGENE_PMU_EVENT_ATTR(rank-active, 0x1e),
571 XGENE_PMU_EVENT_ATTR(rank-idle, 0x1f),
572 XGENE_PMU_EVENT_ATTR(rank-pd, 0x20),
573 XGENE_PMU_EVENT_ATTR(rank-sref, 0x21),
574 XGENE_PMU_EVENT_ATTR(queue-fill-gt-thresh, 0x22),
575 XGENE_PMU_EVENT_ATTR(queue-rds-gt-thresh, 0x23),
576 XGENE_PMU_EVENT_ATTR(queue-wrs-gt-thresh, 0x24),
577 XGENE_PMU_EVENT_ATTR(phy-updt-complt, 0x25),
578 XGENE_PMU_EVENT_ATTR(tz-fail, 0x26),
579 XGENE_PMU_EVENT_ATTR(dram-errc, 0x27),
580 XGENE_PMU_EVENT_ATTR(dram-errd, 0x28),
581 XGENE_PMU_EVENT_ATTR(rd-enq, 0x29),
582 XGENE_PMU_EVENT_ATTR(wr-enq, 0x2a),
583 XGENE_PMU_EVENT_ATTR(tmac-limit-reached, 0x2b),
584 XGENE_PMU_EVENT_ATTR(tmaw-tracker-full, 0x2c),
585 NULL,
586 };
587
588 static const struct attribute_group l3c_pmu_v3_events_attr_group = {
589 .name = "events",
590 .attrs = l3c_pmu_v3_events_attrs,
591 };
592
593 static const struct attribute_group iob_fast_pmu_v3_events_attr_group = {
594 .name = "events",
595 .attrs = iob_fast_pmu_v3_events_attrs,
596 };
597
598 static const struct attribute_group iob_slow_pmu_v3_events_attr_group = {
599 .name = "events",
600 .attrs = iob_slow_pmu_v3_events_attrs,
601 };
602
603 static const struct attribute_group mcb_pmu_v3_events_attr_group = {
604 .name = "events",
605 .attrs = mcb_pmu_v3_events_attrs,
606 };
607
608 static const struct attribute_group mc_pmu_v3_events_attr_group = {
609 .name = "events",
610 .attrs = mc_pmu_v3_events_attrs,
611 };
612
613 /*
614 * sysfs cpumask attributes
615 */
xgene_pmu_cpumask_show(struct device * dev,struct device_attribute * attr,char * buf)616 static ssize_t xgene_pmu_cpumask_show(struct device *dev,
617 struct device_attribute *attr, char *buf)
618 {
619 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(dev_get_drvdata(dev));
620
621 return cpumap_print_to_pagebuf(true, buf, &pmu_dev->parent->cpu);
622 }
623
624 static DEVICE_ATTR(cpumask, S_IRUGO, xgene_pmu_cpumask_show, NULL);
625
626 static struct attribute *xgene_pmu_cpumask_attrs[] = {
627 &dev_attr_cpumask.attr,
628 NULL,
629 };
630
631 static const struct attribute_group pmu_cpumask_attr_group = {
632 .attrs = xgene_pmu_cpumask_attrs,
633 };
634
635 /*
636 * Per PMU device attribute groups of PMU v1 and v2
637 */
638 static const struct attribute_group *l3c_pmu_attr_groups[] = {
639 &l3c_pmu_format_attr_group,
640 &pmu_cpumask_attr_group,
641 &l3c_pmu_events_attr_group,
642 NULL
643 };
644
645 static const struct attribute_group *iob_pmu_attr_groups[] = {
646 &iob_pmu_format_attr_group,
647 &pmu_cpumask_attr_group,
648 &iob_pmu_events_attr_group,
649 NULL
650 };
651
652 static const struct attribute_group *mcb_pmu_attr_groups[] = {
653 &mcb_pmu_format_attr_group,
654 &pmu_cpumask_attr_group,
655 &mcb_pmu_events_attr_group,
656 NULL
657 };
658
659 static const struct attribute_group *mc_pmu_attr_groups[] = {
660 &mc_pmu_format_attr_group,
661 &pmu_cpumask_attr_group,
662 &mc_pmu_events_attr_group,
663 NULL
664 };
665
666 /*
667 * Per PMU device attribute groups of PMU v3
668 */
669 static const struct attribute_group *l3c_pmu_v3_attr_groups[] = {
670 &l3c_pmu_v3_format_attr_group,
671 &pmu_cpumask_attr_group,
672 &l3c_pmu_v3_events_attr_group,
673 NULL
674 };
675
676 static const struct attribute_group *iob_fast_pmu_v3_attr_groups[] = {
677 &iob_pmu_v3_format_attr_group,
678 &pmu_cpumask_attr_group,
679 &iob_fast_pmu_v3_events_attr_group,
680 NULL
681 };
682
683 static const struct attribute_group *iob_slow_pmu_v3_attr_groups[] = {
684 &iob_slow_pmu_v3_format_attr_group,
685 &pmu_cpumask_attr_group,
686 &iob_slow_pmu_v3_events_attr_group,
687 NULL
688 };
689
690 static const struct attribute_group *mcb_pmu_v3_attr_groups[] = {
691 &mcb_pmu_v3_format_attr_group,
692 &pmu_cpumask_attr_group,
693 &mcb_pmu_v3_events_attr_group,
694 NULL
695 };
696
697 static const struct attribute_group *mc_pmu_v3_attr_groups[] = {
698 &mc_pmu_v3_format_attr_group,
699 &pmu_cpumask_attr_group,
700 &mc_pmu_v3_events_attr_group,
701 NULL
702 };
703
get_next_avail_cntr(struct xgene_pmu_dev * pmu_dev)704 static int get_next_avail_cntr(struct xgene_pmu_dev *pmu_dev)
705 {
706 int cntr;
707
708 cntr = find_first_zero_bit(pmu_dev->cntr_assign_mask,
709 pmu_dev->max_counters);
710 if (cntr == pmu_dev->max_counters)
711 return -ENOSPC;
712 set_bit(cntr, pmu_dev->cntr_assign_mask);
713
714 return cntr;
715 }
716
clear_avail_cntr(struct xgene_pmu_dev * pmu_dev,int cntr)717 static void clear_avail_cntr(struct xgene_pmu_dev *pmu_dev, int cntr)
718 {
719 clear_bit(cntr, pmu_dev->cntr_assign_mask);
720 }
721
xgene_pmu_mask_int(struct xgene_pmu * xgene_pmu)722 static inline void xgene_pmu_mask_int(struct xgene_pmu *xgene_pmu)
723 {
724 writel(PCPPMU_INTENMASK, xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG);
725 }
726
xgene_pmu_v3_mask_int(struct xgene_pmu * xgene_pmu)727 static inline void xgene_pmu_v3_mask_int(struct xgene_pmu *xgene_pmu)
728 {
729 writel(PCPPMU_V3_INTENMASK, xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG);
730 }
731
xgene_pmu_unmask_int(struct xgene_pmu * xgene_pmu)732 static inline void xgene_pmu_unmask_int(struct xgene_pmu *xgene_pmu)
733 {
734 writel(PCPPMU_INTCLRMASK, xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG);
735 }
736
xgene_pmu_v3_unmask_int(struct xgene_pmu * xgene_pmu)737 static inline void xgene_pmu_v3_unmask_int(struct xgene_pmu *xgene_pmu)
738 {
739 writel(PCPPMU_V3_INTCLRMASK,
740 xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG);
741 }
742
xgene_pmu_read_counter32(struct xgene_pmu_dev * pmu_dev,int idx)743 static inline u64 xgene_pmu_read_counter32(struct xgene_pmu_dev *pmu_dev,
744 int idx)
745 {
746 return readl(pmu_dev->inf->csr + PMU_PMEVCNTR0 + (4 * idx));
747 }
748
xgene_pmu_read_counter64(struct xgene_pmu_dev * pmu_dev,int idx)749 static inline u64 xgene_pmu_read_counter64(struct xgene_pmu_dev *pmu_dev,
750 int idx)
751 {
752 u32 lo, hi;
753
754 /*
755 * v3 has 64-bit counter registers composed by 2 32-bit registers
756 * This can be a problem if the counter increases and carries
757 * out of bit [31] between 2 reads. The extra reads would help
758 * to prevent this issue.
759 */
760 do {
761 hi = xgene_pmu_read_counter32(pmu_dev, 2 * idx + 1);
762 lo = xgene_pmu_read_counter32(pmu_dev, 2 * idx);
763 } while (hi != xgene_pmu_read_counter32(pmu_dev, 2 * idx + 1));
764
765 return (((u64)hi << 32) | lo);
766 }
767
768 static inline void
xgene_pmu_write_counter32(struct xgene_pmu_dev * pmu_dev,int idx,u64 val)769 xgene_pmu_write_counter32(struct xgene_pmu_dev *pmu_dev, int idx, u64 val)
770 {
771 writel(val, pmu_dev->inf->csr + PMU_PMEVCNTR0 + (4 * idx));
772 }
773
774 static inline void
xgene_pmu_write_counter64(struct xgene_pmu_dev * pmu_dev,int idx,u64 val)775 xgene_pmu_write_counter64(struct xgene_pmu_dev *pmu_dev, int idx, u64 val)
776 {
777 u32 cnt_lo, cnt_hi;
778
779 cnt_hi = upper_32_bits(val);
780 cnt_lo = lower_32_bits(val);
781
782 /* v3 has 64-bit counter registers composed by 2 32-bit registers */
783 xgene_pmu_write_counter32(pmu_dev, 2 * idx, cnt_lo);
784 xgene_pmu_write_counter32(pmu_dev, 2 * idx + 1, cnt_hi);
785 }
786
787 static inline void
xgene_pmu_write_evttype(struct xgene_pmu_dev * pmu_dev,int idx,u32 val)788 xgene_pmu_write_evttype(struct xgene_pmu_dev *pmu_dev, int idx, u32 val)
789 {
790 writel(val, pmu_dev->inf->csr + PMU_PMEVTYPER0 + (4 * idx));
791 }
792
793 static inline void
xgene_pmu_write_agentmsk(struct xgene_pmu_dev * pmu_dev,u32 val)794 xgene_pmu_write_agentmsk(struct xgene_pmu_dev *pmu_dev, u32 val)
795 {
796 writel(val, pmu_dev->inf->csr + PMU_PMAMR0);
797 }
798
799 static inline void
xgene_pmu_v3_write_agentmsk(struct xgene_pmu_dev * pmu_dev,u32 val)800 xgene_pmu_v3_write_agentmsk(struct xgene_pmu_dev *pmu_dev, u32 val) { }
801
802 static inline void
xgene_pmu_write_agent1msk(struct xgene_pmu_dev * pmu_dev,u32 val)803 xgene_pmu_write_agent1msk(struct xgene_pmu_dev *pmu_dev, u32 val)
804 {
805 writel(val, pmu_dev->inf->csr + PMU_PMAMR1);
806 }
807
808 static inline void
xgene_pmu_v3_write_agent1msk(struct xgene_pmu_dev * pmu_dev,u32 val)809 xgene_pmu_v3_write_agent1msk(struct xgene_pmu_dev *pmu_dev, u32 val) { }
810
811 static inline void
xgene_pmu_enable_counter(struct xgene_pmu_dev * pmu_dev,int idx)812 xgene_pmu_enable_counter(struct xgene_pmu_dev *pmu_dev, int idx)
813 {
814 u32 val;
815
816 val = readl(pmu_dev->inf->csr + PMU_PMCNTENSET);
817 val |= 1 << idx;
818 writel(val, pmu_dev->inf->csr + PMU_PMCNTENSET);
819 }
820
821 static inline void
xgene_pmu_disable_counter(struct xgene_pmu_dev * pmu_dev,int idx)822 xgene_pmu_disable_counter(struct xgene_pmu_dev *pmu_dev, int idx)
823 {
824 u32 val;
825
826 val = readl(pmu_dev->inf->csr + PMU_PMCNTENCLR);
827 val |= 1 << idx;
828 writel(val, pmu_dev->inf->csr + PMU_PMCNTENCLR);
829 }
830
831 static inline void
xgene_pmu_enable_counter_int(struct xgene_pmu_dev * pmu_dev,int idx)832 xgene_pmu_enable_counter_int(struct xgene_pmu_dev *pmu_dev, int idx)
833 {
834 u32 val;
835
836 val = readl(pmu_dev->inf->csr + PMU_PMINTENSET);
837 val |= 1 << idx;
838 writel(val, pmu_dev->inf->csr + PMU_PMINTENSET);
839 }
840
841 static inline void
xgene_pmu_disable_counter_int(struct xgene_pmu_dev * pmu_dev,int idx)842 xgene_pmu_disable_counter_int(struct xgene_pmu_dev *pmu_dev, int idx)
843 {
844 u32 val;
845
846 val = readl(pmu_dev->inf->csr + PMU_PMINTENCLR);
847 val |= 1 << idx;
848 writel(val, pmu_dev->inf->csr + PMU_PMINTENCLR);
849 }
850
xgene_pmu_reset_counters(struct xgene_pmu_dev * pmu_dev)851 static inline void xgene_pmu_reset_counters(struct xgene_pmu_dev *pmu_dev)
852 {
853 u32 val;
854
855 val = readl(pmu_dev->inf->csr + PMU_PMCR);
856 val |= PMU_PMCR_P;
857 writel(val, pmu_dev->inf->csr + PMU_PMCR);
858 }
859
xgene_pmu_start_counters(struct xgene_pmu_dev * pmu_dev)860 static inline void xgene_pmu_start_counters(struct xgene_pmu_dev *pmu_dev)
861 {
862 u32 val;
863
864 val = readl(pmu_dev->inf->csr + PMU_PMCR);
865 val |= PMU_PMCR_E;
866 writel(val, pmu_dev->inf->csr + PMU_PMCR);
867 }
868
xgene_pmu_stop_counters(struct xgene_pmu_dev * pmu_dev)869 static inline void xgene_pmu_stop_counters(struct xgene_pmu_dev *pmu_dev)
870 {
871 u32 val;
872
873 val = readl(pmu_dev->inf->csr + PMU_PMCR);
874 val &= ~PMU_PMCR_E;
875 writel(val, pmu_dev->inf->csr + PMU_PMCR);
876 }
877
xgene_perf_pmu_enable(struct pmu * pmu)878 static void xgene_perf_pmu_enable(struct pmu *pmu)
879 {
880 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(pmu);
881 struct xgene_pmu *xgene_pmu = pmu_dev->parent;
882 int enabled = bitmap_weight(pmu_dev->cntr_assign_mask,
883 pmu_dev->max_counters);
884
885 if (!enabled)
886 return;
887
888 xgene_pmu->ops->start_counters(pmu_dev);
889 }
890
xgene_perf_pmu_disable(struct pmu * pmu)891 static void xgene_perf_pmu_disable(struct pmu *pmu)
892 {
893 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(pmu);
894 struct xgene_pmu *xgene_pmu = pmu_dev->parent;
895
896 xgene_pmu->ops->stop_counters(pmu_dev);
897 }
898
xgene_perf_event_init(struct perf_event * event)899 static int xgene_perf_event_init(struct perf_event *event)
900 {
901 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
902 struct hw_perf_event *hw = &event->hw;
903 struct perf_event *sibling;
904
905 /* Test the event attr type check for PMU enumeration */
906 if (event->attr.type != event->pmu->type)
907 return -ENOENT;
908
909 /*
910 * SOC PMU counters are shared across all cores.
911 * Therefore, it does not support per-process mode.
912 * Also, it does not support event sampling mode.
913 */
914 if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK)
915 return -EINVAL;
916
917 /* SOC counters do not have usr/os/guest/host bits */
918 if (event->attr.exclude_user || event->attr.exclude_kernel ||
919 event->attr.exclude_host || event->attr.exclude_guest)
920 return -EINVAL;
921
922 if (event->cpu < 0)
923 return -EINVAL;
924 /*
925 * Many perf core operations (eg. events rotation) operate on a
926 * single CPU context. This is obvious for CPU PMUs, where one
927 * expects the same sets of events being observed on all CPUs,
928 * but can lead to issues for off-core PMUs, where each
929 * event could be theoretically assigned to a different CPU. To
930 * mitigate this, we enforce CPU assignment to one, selected
931 * processor (the one described in the "cpumask" attribute).
932 */
933 event->cpu = cpumask_first(&pmu_dev->parent->cpu);
934
935 hw->config = event->attr.config;
936 /*
937 * Each bit of the config1 field represents an agent from which the
938 * request of the event come. The event is counted only if it's caused
939 * by a request of an agent has the bit cleared.
940 * By default, the event is counted for all agents.
941 */
942 hw->config_base = event->attr.config1;
943
944 /*
945 * We must NOT create groups containing mixed PMUs, although software
946 * events are acceptable
947 */
948 if (event->group_leader->pmu != event->pmu &&
949 !is_software_event(event->group_leader))
950 return -EINVAL;
951
952 for_each_sibling_event(sibling, event->group_leader) {
953 if (sibling->pmu != event->pmu &&
954 !is_software_event(sibling))
955 return -EINVAL;
956 }
957
958 return 0;
959 }
960
xgene_perf_enable_event(struct perf_event * event)961 static void xgene_perf_enable_event(struct perf_event *event)
962 {
963 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
964 struct xgene_pmu *xgene_pmu = pmu_dev->parent;
965
966 xgene_pmu->ops->write_evttype(pmu_dev, GET_CNTR(event),
967 GET_EVENTID(event));
968 xgene_pmu->ops->write_agentmsk(pmu_dev, ~((u32)GET_AGENTID(event)));
969 if (pmu_dev->inf->type == PMU_TYPE_IOB)
970 xgene_pmu->ops->write_agent1msk(pmu_dev,
971 ~((u32)GET_AGENT1ID(event)));
972
973 xgene_pmu->ops->enable_counter(pmu_dev, GET_CNTR(event));
974 xgene_pmu->ops->enable_counter_int(pmu_dev, GET_CNTR(event));
975 }
976
xgene_perf_disable_event(struct perf_event * event)977 static void xgene_perf_disable_event(struct perf_event *event)
978 {
979 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
980 struct xgene_pmu *xgene_pmu = pmu_dev->parent;
981
982 xgene_pmu->ops->disable_counter(pmu_dev, GET_CNTR(event));
983 xgene_pmu->ops->disable_counter_int(pmu_dev, GET_CNTR(event));
984 }
985
xgene_perf_event_set_period(struct perf_event * event)986 static void xgene_perf_event_set_period(struct perf_event *event)
987 {
988 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
989 struct xgene_pmu *xgene_pmu = pmu_dev->parent;
990 struct hw_perf_event *hw = &event->hw;
991 /*
992 * For 32 bit counter, it has a period of 2^32. To account for the
993 * possibility of extreme interrupt latency we program for a period of
994 * half that. Hopefully, we can handle the interrupt before another 2^31
995 * events occur and the counter overtakes its previous value.
996 * For 64 bit counter, we don't expect it overflow.
997 */
998 u64 val = 1ULL << 31;
999
1000 local64_set(&hw->prev_count, val);
1001 xgene_pmu->ops->write_counter(pmu_dev, hw->idx, val);
1002 }
1003
xgene_perf_event_update(struct perf_event * event)1004 static void xgene_perf_event_update(struct perf_event *event)
1005 {
1006 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
1007 struct xgene_pmu *xgene_pmu = pmu_dev->parent;
1008 struct hw_perf_event *hw = &event->hw;
1009 u64 delta, prev_raw_count, new_raw_count;
1010
1011 again:
1012 prev_raw_count = local64_read(&hw->prev_count);
1013 new_raw_count = xgene_pmu->ops->read_counter(pmu_dev, GET_CNTR(event));
1014
1015 if (local64_cmpxchg(&hw->prev_count, prev_raw_count,
1016 new_raw_count) != prev_raw_count)
1017 goto again;
1018
1019 delta = (new_raw_count - prev_raw_count) & pmu_dev->max_period;
1020
1021 local64_add(delta, &event->count);
1022 }
1023
xgene_perf_read(struct perf_event * event)1024 static void xgene_perf_read(struct perf_event *event)
1025 {
1026 xgene_perf_event_update(event);
1027 }
1028
xgene_perf_start(struct perf_event * event,int flags)1029 static void xgene_perf_start(struct perf_event *event, int flags)
1030 {
1031 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
1032 struct xgene_pmu *xgene_pmu = pmu_dev->parent;
1033 struct hw_perf_event *hw = &event->hw;
1034
1035 if (WARN_ON_ONCE(!(hw->state & PERF_HES_STOPPED)))
1036 return;
1037
1038 WARN_ON_ONCE(!(hw->state & PERF_HES_UPTODATE));
1039 hw->state = 0;
1040
1041 xgene_perf_event_set_period(event);
1042
1043 if (flags & PERF_EF_RELOAD) {
1044 u64 prev_raw_count = local64_read(&hw->prev_count);
1045
1046 xgene_pmu->ops->write_counter(pmu_dev, GET_CNTR(event),
1047 prev_raw_count);
1048 }
1049
1050 xgene_perf_enable_event(event);
1051 perf_event_update_userpage(event);
1052 }
1053
xgene_perf_stop(struct perf_event * event,int flags)1054 static void xgene_perf_stop(struct perf_event *event, int flags)
1055 {
1056 struct hw_perf_event *hw = &event->hw;
1057 u64 config;
1058
1059 if (hw->state & PERF_HES_UPTODATE)
1060 return;
1061
1062 xgene_perf_disable_event(event);
1063 WARN_ON_ONCE(hw->state & PERF_HES_STOPPED);
1064 hw->state |= PERF_HES_STOPPED;
1065
1066 if (hw->state & PERF_HES_UPTODATE)
1067 return;
1068
1069 config = hw->config;
1070 xgene_perf_read(event);
1071 hw->state |= PERF_HES_UPTODATE;
1072 }
1073
xgene_perf_add(struct perf_event * event,int flags)1074 static int xgene_perf_add(struct perf_event *event, int flags)
1075 {
1076 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
1077 struct hw_perf_event *hw = &event->hw;
1078
1079 hw->state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
1080
1081 /* Allocate an event counter */
1082 hw->idx = get_next_avail_cntr(pmu_dev);
1083 if (hw->idx < 0)
1084 return -EAGAIN;
1085
1086 /* Update counter event pointer for Interrupt handler */
1087 pmu_dev->pmu_counter_event[hw->idx] = event;
1088
1089 if (flags & PERF_EF_START)
1090 xgene_perf_start(event, PERF_EF_RELOAD);
1091
1092 return 0;
1093 }
1094
xgene_perf_del(struct perf_event * event,int flags)1095 static void xgene_perf_del(struct perf_event *event, int flags)
1096 {
1097 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
1098 struct hw_perf_event *hw = &event->hw;
1099
1100 xgene_perf_stop(event, PERF_EF_UPDATE);
1101
1102 /* clear the assigned counter */
1103 clear_avail_cntr(pmu_dev, GET_CNTR(event));
1104
1105 perf_event_update_userpage(event);
1106 pmu_dev->pmu_counter_event[hw->idx] = NULL;
1107 }
1108
xgene_init_perf(struct xgene_pmu_dev * pmu_dev,char * name)1109 static int xgene_init_perf(struct xgene_pmu_dev *pmu_dev, char *name)
1110 {
1111 struct xgene_pmu *xgene_pmu;
1112
1113 if (pmu_dev->parent->version == PCP_PMU_V3)
1114 pmu_dev->max_period = PMU_V3_CNT_MAX_PERIOD;
1115 else
1116 pmu_dev->max_period = PMU_CNT_MAX_PERIOD;
1117 /* First version PMU supports only single event counter */
1118 xgene_pmu = pmu_dev->parent;
1119 if (xgene_pmu->version == PCP_PMU_V1)
1120 pmu_dev->max_counters = 1;
1121 else
1122 pmu_dev->max_counters = PMU_MAX_COUNTERS;
1123
1124 /* Perf driver registration */
1125 pmu_dev->pmu = (struct pmu) {
1126 .attr_groups = pmu_dev->attr_groups,
1127 .task_ctx_nr = perf_invalid_context,
1128 .pmu_enable = xgene_perf_pmu_enable,
1129 .pmu_disable = xgene_perf_pmu_disable,
1130 .event_init = xgene_perf_event_init,
1131 .add = xgene_perf_add,
1132 .del = xgene_perf_del,
1133 .start = xgene_perf_start,
1134 .stop = xgene_perf_stop,
1135 .read = xgene_perf_read,
1136 };
1137
1138 /* Hardware counter init */
1139 xgene_pmu->ops->stop_counters(pmu_dev);
1140 xgene_pmu->ops->reset_counters(pmu_dev);
1141
1142 return perf_pmu_register(&pmu_dev->pmu, name, -1);
1143 }
1144
1145 static int
xgene_pmu_dev_add(struct xgene_pmu * xgene_pmu,struct xgene_pmu_dev_ctx * ctx)1146 xgene_pmu_dev_add(struct xgene_pmu *xgene_pmu, struct xgene_pmu_dev_ctx *ctx)
1147 {
1148 struct device *dev = xgene_pmu->dev;
1149 struct xgene_pmu_dev *pmu;
1150
1151 pmu = devm_kzalloc(dev, sizeof(*pmu), GFP_KERNEL);
1152 if (!pmu)
1153 return -ENOMEM;
1154 pmu->parent = xgene_pmu;
1155 pmu->inf = &ctx->inf;
1156 ctx->pmu_dev = pmu;
1157
1158 switch (pmu->inf->type) {
1159 case PMU_TYPE_L3C:
1160 if (!(xgene_pmu->l3c_active_mask & pmu->inf->enable_mask))
1161 return -ENODEV;
1162 if (xgene_pmu->version == PCP_PMU_V3)
1163 pmu->attr_groups = l3c_pmu_v3_attr_groups;
1164 else
1165 pmu->attr_groups = l3c_pmu_attr_groups;
1166 break;
1167 case PMU_TYPE_IOB:
1168 if (xgene_pmu->version == PCP_PMU_V3)
1169 pmu->attr_groups = iob_fast_pmu_v3_attr_groups;
1170 else
1171 pmu->attr_groups = iob_pmu_attr_groups;
1172 break;
1173 case PMU_TYPE_IOB_SLOW:
1174 if (xgene_pmu->version == PCP_PMU_V3)
1175 pmu->attr_groups = iob_slow_pmu_v3_attr_groups;
1176 break;
1177 case PMU_TYPE_MCB:
1178 if (!(xgene_pmu->mcb_active_mask & pmu->inf->enable_mask))
1179 return -ENODEV;
1180 if (xgene_pmu->version == PCP_PMU_V3)
1181 pmu->attr_groups = mcb_pmu_v3_attr_groups;
1182 else
1183 pmu->attr_groups = mcb_pmu_attr_groups;
1184 break;
1185 case PMU_TYPE_MC:
1186 if (!(xgene_pmu->mc_active_mask & pmu->inf->enable_mask))
1187 return -ENODEV;
1188 if (xgene_pmu->version == PCP_PMU_V3)
1189 pmu->attr_groups = mc_pmu_v3_attr_groups;
1190 else
1191 pmu->attr_groups = mc_pmu_attr_groups;
1192 break;
1193 default:
1194 return -EINVAL;
1195 }
1196
1197 if (xgene_init_perf(pmu, ctx->name)) {
1198 dev_err(dev, "%s PMU: Failed to init perf driver\n", ctx->name);
1199 return -ENODEV;
1200 }
1201
1202 dev_info(dev, "%s PMU registered\n", ctx->name);
1203
1204 return 0;
1205 }
1206
_xgene_pmu_isr(int irq,struct xgene_pmu_dev * pmu_dev)1207 static void _xgene_pmu_isr(int irq, struct xgene_pmu_dev *pmu_dev)
1208 {
1209 struct xgene_pmu *xgene_pmu = pmu_dev->parent;
1210 void __iomem *csr = pmu_dev->inf->csr;
1211 u32 pmovsr;
1212 int idx;
1213
1214 xgene_pmu->ops->stop_counters(pmu_dev);
1215
1216 if (xgene_pmu->version == PCP_PMU_V3)
1217 pmovsr = readl(csr + PMU_PMOVSSET) & PMU_OVERFLOW_MASK;
1218 else
1219 pmovsr = readl(csr + PMU_PMOVSR) & PMU_OVERFLOW_MASK;
1220
1221 if (!pmovsr)
1222 goto out;
1223
1224 /* Clear interrupt flag */
1225 if (xgene_pmu->version == PCP_PMU_V1)
1226 writel(0x0, csr + PMU_PMOVSR);
1227 else if (xgene_pmu->version == PCP_PMU_V2)
1228 writel(pmovsr, csr + PMU_PMOVSR);
1229 else
1230 writel(pmovsr, csr + PMU_PMOVSCLR);
1231
1232 for (idx = 0; idx < PMU_MAX_COUNTERS; idx++) {
1233 struct perf_event *event = pmu_dev->pmu_counter_event[idx];
1234 int overflowed = pmovsr & BIT(idx);
1235
1236 /* Ignore if we don't have an event. */
1237 if (!event || !overflowed)
1238 continue;
1239 xgene_perf_event_update(event);
1240 xgene_perf_event_set_period(event);
1241 }
1242
1243 out:
1244 xgene_pmu->ops->start_counters(pmu_dev);
1245 }
1246
xgene_pmu_isr(int irq,void * dev_id)1247 static irqreturn_t xgene_pmu_isr(int irq, void *dev_id)
1248 {
1249 u32 intr_mcu, intr_mcb, intr_l3c, intr_iob;
1250 struct xgene_pmu_dev_ctx *ctx;
1251 struct xgene_pmu *xgene_pmu = dev_id;
1252 unsigned long flags;
1253 u32 val;
1254
1255 raw_spin_lock_irqsave(&xgene_pmu->lock, flags);
1256
1257 /* Get Interrupt PMU source */
1258 val = readl(xgene_pmu->pcppmu_csr + PCPPMU_INTSTATUS_REG);
1259 if (xgene_pmu->version == PCP_PMU_V3) {
1260 intr_mcu = PCPPMU_V3_INT_MCU;
1261 intr_mcb = PCPPMU_V3_INT_MCB;
1262 intr_l3c = PCPPMU_V3_INT_L3C;
1263 intr_iob = PCPPMU_V3_INT_IOB;
1264 } else {
1265 intr_mcu = PCPPMU_INT_MCU;
1266 intr_mcb = PCPPMU_INT_MCB;
1267 intr_l3c = PCPPMU_INT_L3C;
1268 intr_iob = PCPPMU_INT_IOB;
1269 }
1270 if (val & intr_mcu) {
1271 list_for_each_entry(ctx, &xgene_pmu->mcpmus, next) {
1272 _xgene_pmu_isr(irq, ctx->pmu_dev);
1273 }
1274 }
1275 if (val & intr_mcb) {
1276 list_for_each_entry(ctx, &xgene_pmu->mcbpmus, next) {
1277 _xgene_pmu_isr(irq, ctx->pmu_dev);
1278 }
1279 }
1280 if (val & intr_l3c) {
1281 list_for_each_entry(ctx, &xgene_pmu->l3cpmus, next) {
1282 _xgene_pmu_isr(irq, ctx->pmu_dev);
1283 }
1284 }
1285 if (val & intr_iob) {
1286 list_for_each_entry(ctx, &xgene_pmu->iobpmus, next) {
1287 _xgene_pmu_isr(irq, ctx->pmu_dev);
1288 }
1289 }
1290
1291 raw_spin_unlock_irqrestore(&xgene_pmu->lock, flags);
1292
1293 return IRQ_HANDLED;
1294 }
1295
acpi_pmu_probe_active_mcb_mcu_l3c(struct xgene_pmu * xgene_pmu,struct platform_device * pdev)1296 static int acpi_pmu_probe_active_mcb_mcu_l3c(struct xgene_pmu *xgene_pmu,
1297 struct platform_device *pdev)
1298 {
1299 void __iomem *csw_csr, *mcba_csr, *mcbb_csr;
1300 struct resource *res;
1301 unsigned int reg;
1302
1303 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1304 csw_csr = devm_ioremap_resource(&pdev->dev, res);
1305 if (IS_ERR(csw_csr)) {
1306 dev_err(&pdev->dev, "ioremap failed for CSW CSR resource\n");
1307 return PTR_ERR(csw_csr);
1308 }
1309
1310 res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
1311 mcba_csr = devm_ioremap_resource(&pdev->dev, res);
1312 if (IS_ERR(mcba_csr)) {
1313 dev_err(&pdev->dev, "ioremap failed for MCBA CSR resource\n");
1314 return PTR_ERR(mcba_csr);
1315 }
1316
1317 res = platform_get_resource(pdev, IORESOURCE_MEM, 3);
1318 mcbb_csr = devm_ioremap_resource(&pdev->dev, res);
1319 if (IS_ERR(mcbb_csr)) {
1320 dev_err(&pdev->dev, "ioremap failed for MCBB CSR resource\n");
1321 return PTR_ERR(mcbb_csr);
1322 }
1323
1324 xgene_pmu->l3c_active_mask = 0x1;
1325
1326 reg = readl(csw_csr + CSW_CSWCR);
1327 if (reg & CSW_CSWCR_DUALMCB_MASK) {
1328 /* Dual MCB active */
1329 xgene_pmu->mcb_active_mask = 0x3;
1330 /* Probe all active MC(s) */
1331 reg = readl(mcbb_csr + CSW_CSWCR);
1332 xgene_pmu->mc_active_mask =
1333 (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0xF : 0x5;
1334 } else {
1335 /* Single MCB active */
1336 xgene_pmu->mcb_active_mask = 0x1;
1337 /* Probe all active MC(s) */
1338 reg = readl(mcba_csr + CSW_CSWCR);
1339 xgene_pmu->mc_active_mask =
1340 (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0x3 : 0x1;
1341 }
1342
1343 return 0;
1344 }
1345
acpi_pmu_v3_probe_active_mcb_mcu_l3c(struct xgene_pmu * xgene_pmu,struct platform_device * pdev)1346 static int acpi_pmu_v3_probe_active_mcb_mcu_l3c(struct xgene_pmu *xgene_pmu,
1347 struct platform_device *pdev)
1348 {
1349 void __iomem *csw_csr;
1350 struct resource *res;
1351 unsigned int reg;
1352 u32 mcb0routing;
1353 u32 mcb1routing;
1354
1355 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1356 csw_csr = devm_ioremap_resource(&pdev->dev, res);
1357 if (IS_ERR(csw_csr)) {
1358 dev_err(&pdev->dev, "ioremap failed for CSW CSR resource\n");
1359 return PTR_ERR(csw_csr);
1360 }
1361
1362 reg = readl(csw_csr + CSW_CSWCR);
1363 mcb0routing = CSW_CSWCR_MCB0_ROUTING(reg);
1364 mcb1routing = CSW_CSWCR_MCB1_ROUTING(reg);
1365 if (reg & CSW_CSWCR_DUALMCB_MASK) {
1366 /* Dual MCB active */
1367 xgene_pmu->mcb_active_mask = 0x3;
1368 /* Probe all active L3C(s), maximum is 8 */
1369 xgene_pmu->l3c_active_mask = 0xFF;
1370 /* Probe all active MC(s), maximum is 8 */
1371 if ((mcb0routing == 0x2) && (mcb1routing == 0x2))
1372 xgene_pmu->mc_active_mask = 0xFF;
1373 else if ((mcb0routing == 0x1) && (mcb1routing == 0x1))
1374 xgene_pmu->mc_active_mask = 0x33;
1375 else
1376 xgene_pmu->mc_active_mask = 0x11;
1377 } else {
1378 /* Single MCB active */
1379 xgene_pmu->mcb_active_mask = 0x1;
1380 /* Probe all active L3C(s), maximum is 4 */
1381 xgene_pmu->l3c_active_mask = 0x0F;
1382 /* Probe all active MC(s), maximum is 4 */
1383 if (mcb0routing == 0x2)
1384 xgene_pmu->mc_active_mask = 0x0F;
1385 else if (mcb0routing == 0x1)
1386 xgene_pmu->mc_active_mask = 0x03;
1387 else
1388 xgene_pmu->mc_active_mask = 0x01;
1389 }
1390
1391 return 0;
1392 }
1393
fdt_pmu_probe_active_mcb_mcu_l3c(struct xgene_pmu * xgene_pmu,struct platform_device * pdev)1394 static int fdt_pmu_probe_active_mcb_mcu_l3c(struct xgene_pmu *xgene_pmu,
1395 struct platform_device *pdev)
1396 {
1397 struct regmap *csw_map, *mcba_map, *mcbb_map;
1398 struct device_node *np = pdev->dev.of_node;
1399 unsigned int reg;
1400
1401 csw_map = syscon_regmap_lookup_by_phandle(np, "regmap-csw");
1402 if (IS_ERR(csw_map)) {
1403 dev_err(&pdev->dev, "unable to get syscon regmap csw\n");
1404 return PTR_ERR(csw_map);
1405 }
1406
1407 mcba_map = syscon_regmap_lookup_by_phandle(np, "regmap-mcba");
1408 if (IS_ERR(mcba_map)) {
1409 dev_err(&pdev->dev, "unable to get syscon regmap mcba\n");
1410 return PTR_ERR(mcba_map);
1411 }
1412
1413 mcbb_map = syscon_regmap_lookup_by_phandle(np, "regmap-mcbb");
1414 if (IS_ERR(mcbb_map)) {
1415 dev_err(&pdev->dev, "unable to get syscon regmap mcbb\n");
1416 return PTR_ERR(mcbb_map);
1417 }
1418
1419 xgene_pmu->l3c_active_mask = 0x1;
1420 if (regmap_read(csw_map, CSW_CSWCR, ®))
1421 return -EINVAL;
1422
1423 if (reg & CSW_CSWCR_DUALMCB_MASK) {
1424 /* Dual MCB active */
1425 xgene_pmu->mcb_active_mask = 0x3;
1426 /* Probe all active MC(s) */
1427 if (regmap_read(mcbb_map, MCBADDRMR, ®))
1428 return 0;
1429 xgene_pmu->mc_active_mask =
1430 (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0xF : 0x5;
1431 } else {
1432 /* Single MCB active */
1433 xgene_pmu->mcb_active_mask = 0x1;
1434 /* Probe all active MC(s) */
1435 if (regmap_read(mcba_map, MCBADDRMR, ®))
1436 return 0;
1437 xgene_pmu->mc_active_mask =
1438 (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0x3 : 0x1;
1439 }
1440
1441 return 0;
1442 }
1443
xgene_pmu_probe_active_mcb_mcu_l3c(struct xgene_pmu * xgene_pmu,struct platform_device * pdev)1444 static int xgene_pmu_probe_active_mcb_mcu_l3c(struct xgene_pmu *xgene_pmu,
1445 struct platform_device *pdev)
1446 {
1447 if (has_acpi_companion(&pdev->dev)) {
1448 if (xgene_pmu->version == PCP_PMU_V3)
1449 return acpi_pmu_v3_probe_active_mcb_mcu_l3c(xgene_pmu,
1450 pdev);
1451 else
1452 return acpi_pmu_probe_active_mcb_mcu_l3c(xgene_pmu,
1453 pdev);
1454 }
1455 return fdt_pmu_probe_active_mcb_mcu_l3c(xgene_pmu, pdev);
1456 }
1457
xgene_pmu_dev_name(struct device * dev,u32 type,int id)1458 static char *xgene_pmu_dev_name(struct device *dev, u32 type, int id)
1459 {
1460 switch (type) {
1461 case PMU_TYPE_L3C:
1462 return devm_kasprintf(dev, GFP_KERNEL, "l3c%d", id);
1463 case PMU_TYPE_IOB:
1464 return devm_kasprintf(dev, GFP_KERNEL, "iob%d", id);
1465 case PMU_TYPE_IOB_SLOW:
1466 return devm_kasprintf(dev, GFP_KERNEL, "iob_slow%d", id);
1467 case PMU_TYPE_MCB:
1468 return devm_kasprintf(dev, GFP_KERNEL, "mcb%d", id);
1469 case PMU_TYPE_MC:
1470 return devm_kasprintf(dev, GFP_KERNEL, "mc%d", id);
1471 default:
1472 return devm_kasprintf(dev, GFP_KERNEL, "unknown");
1473 }
1474 }
1475
1476 #if defined(CONFIG_ACPI)
acpi_pmu_dev_add_resource(struct acpi_resource * ares,void * data)1477 static int acpi_pmu_dev_add_resource(struct acpi_resource *ares, void *data)
1478 {
1479 struct resource *res = data;
1480
1481 if (ares->type == ACPI_RESOURCE_TYPE_FIXED_MEMORY32)
1482 acpi_dev_resource_memory(ares, res);
1483
1484 /* Always tell the ACPI core to skip this resource */
1485 return 1;
1486 }
1487
1488 static struct
acpi_get_pmu_hw_inf(struct xgene_pmu * xgene_pmu,struct acpi_device * adev,u32 type)1489 xgene_pmu_dev_ctx *acpi_get_pmu_hw_inf(struct xgene_pmu *xgene_pmu,
1490 struct acpi_device *adev, u32 type)
1491 {
1492 struct device *dev = xgene_pmu->dev;
1493 struct list_head resource_list;
1494 struct xgene_pmu_dev_ctx *ctx;
1495 const union acpi_object *obj;
1496 struct hw_pmu_info *inf;
1497 void __iomem *dev_csr;
1498 struct resource res;
1499 int enable_bit;
1500 int rc;
1501
1502 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
1503 if (!ctx)
1504 return NULL;
1505
1506 INIT_LIST_HEAD(&resource_list);
1507 rc = acpi_dev_get_resources(adev, &resource_list,
1508 acpi_pmu_dev_add_resource, &res);
1509 acpi_dev_free_resource_list(&resource_list);
1510 if (rc < 0) {
1511 dev_err(dev, "PMU type %d: No resource address found\n", type);
1512 return NULL;
1513 }
1514
1515 dev_csr = devm_ioremap_resource(dev, &res);
1516 if (IS_ERR(dev_csr)) {
1517 dev_err(dev, "PMU type %d: Fail to map resource\n", type);
1518 return NULL;
1519 }
1520
1521 /* A PMU device node without enable-bit-index is always enabled */
1522 rc = acpi_dev_get_property(adev, "enable-bit-index",
1523 ACPI_TYPE_INTEGER, &obj);
1524 if (rc < 0)
1525 enable_bit = 0;
1526 else
1527 enable_bit = (int) obj->integer.value;
1528
1529 ctx->name = xgene_pmu_dev_name(dev, type, enable_bit);
1530 if (!ctx->name) {
1531 dev_err(dev, "PMU type %d: Fail to get device name\n", type);
1532 return NULL;
1533 }
1534 inf = &ctx->inf;
1535 inf->type = type;
1536 inf->csr = dev_csr;
1537 inf->enable_mask = 1 << enable_bit;
1538
1539 return ctx;
1540 }
1541
1542 static const struct acpi_device_id xgene_pmu_acpi_type_match[] = {
1543 {"APMC0D5D", PMU_TYPE_L3C},
1544 {"APMC0D5E", PMU_TYPE_IOB},
1545 {"APMC0D5F", PMU_TYPE_MCB},
1546 {"APMC0D60", PMU_TYPE_MC},
1547 {"APMC0D84", PMU_TYPE_L3C},
1548 {"APMC0D85", PMU_TYPE_IOB},
1549 {"APMC0D86", PMU_TYPE_IOB_SLOW},
1550 {"APMC0D87", PMU_TYPE_MCB},
1551 {"APMC0D88", PMU_TYPE_MC},
1552 {},
1553 };
1554
xgene_pmu_acpi_match_type(const struct acpi_device_id * ids,struct acpi_device * adev)1555 static const struct acpi_device_id *xgene_pmu_acpi_match_type(
1556 const struct acpi_device_id *ids,
1557 struct acpi_device *adev)
1558 {
1559 const struct acpi_device_id *match_id = NULL;
1560 const struct acpi_device_id *id;
1561
1562 for (id = ids; id->id[0] || id->cls; id++) {
1563 if (!acpi_match_device_ids(adev, id))
1564 match_id = id;
1565 else if (match_id)
1566 break;
1567 }
1568
1569 return match_id;
1570 }
1571
acpi_pmu_dev_add(acpi_handle handle,u32 level,void * data,void ** return_value)1572 static acpi_status acpi_pmu_dev_add(acpi_handle handle, u32 level,
1573 void *data, void **return_value)
1574 {
1575 const struct acpi_device_id *acpi_id;
1576 struct xgene_pmu *xgene_pmu = data;
1577 struct xgene_pmu_dev_ctx *ctx;
1578 struct acpi_device *adev;
1579
1580 if (acpi_bus_get_device(handle, &adev))
1581 return AE_OK;
1582 if (acpi_bus_get_status(adev) || !adev->status.present)
1583 return AE_OK;
1584
1585 acpi_id = xgene_pmu_acpi_match_type(xgene_pmu_acpi_type_match, adev);
1586 if (!acpi_id)
1587 return AE_OK;
1588
1589 ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, (u32)acpi_id->driver_data);
1590 if (!ctx)
1591 return AE_OK;
1592
1593 if (xgene_pmu_dev_add(xgene_pmu, ctx)) {
1594 /* Can't add the PMU device, skip it */
1595 devm_kfree(xgene_pmu->dev, ctx);
1596 return AE_OK;
1597 }
1598
1599 switch (ctx->inf.type) {
1600 case PMU_TYPE_L3C:
1601 list_add(&ctx->next, &xgene_pmu->l3cpmus);
1602 break;
1603 case PMU_TYPE_IOB:
1604 list_add(&ctx->next, &xgene_pmu->iobpmus);
1605 break;
1606 case PMU_TYPE_IOB_SLOW:
1607 list_add(&ctx->next, &xgene_pmu->iobpmus);
1608 break;
1609 case PMU_TYPE_MCB:
1610 list_add(&ctx->next, &xgene_pmu->mcbpmus);
1611 break;
1612 case PMU_TYPE_MC:
1613 list_add(&ctx->next, &xgene_pmu->mcpmus);
1614 break;
1615 }
1616 return AE_OK;
1617 }
1618
acpi_pmu_probe_pmu_dev(struct xgene_pmu * xgene_pmu,struct platform_device * pdev)1619 static int acpi_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
1620 struct platform_device *pdev)
1621 {
1622 struct device *dev = xgene_pmu->dev;
1623 acpi_handle handle;
1624 acpi_status status;
1625
1626 handle = ACPI_HANDLE(dev);
1627 if (!handle)
1628 return -EINVAL;
1629
1630 status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
1631 acpi_pmu_dev_add, NULL, xgene_pmu, NULL);
1632 if (ACPI_FAILURE(status)) {
1633 dev_err(dev, "failed to probe PMU devices\n");
1634 return -ENODEV;
1635 }
1636
1637 return 0;
1638 }
1639 #else
acpi_pmu_probe_pmu_dev(struct xgene_pmu * xgene_pmu,struct platform_device * pdev)1640 static int acpi_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
1641 struct platform_device *pdev)
1642 {
1643 return 0;
1644 }
1645 #endif
1646
1647 static struct
fdt_get_pmu_hw_inf(struct xgene_pmu * xgene_pmu,struct device_node * np,u32 type)1648 xgene_pmu_dev_ctx *fdt_get_pmu_hw_inf(struct xgene_pmu *xgene_pmu,
1649 struct device_node *np, u32 type)
1650 {
1651 struct device *dev = xgene_pmu->dev;
1652 struct xgene_pmu_dev_ctx *ctx;
1653 struct hw_pmu_info *inf;
1654 void __iomem *dev_csr;
1655 struct resource res;
1656 int enable_bit;
1657
1658 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
1659 if (!ctx)
1660 return NULL;
1661
1662 if (of_address_to_resource(np, 0, &res) < 0) {
1663 dev_err(dev, "PMU type %d: No resource address found\n", type);
1664 return NULL;
1665 }
1666
1667 dev_csr = devm_ioremap_resource(dev, &res);
1668 if (IS_ERR(dev_csr)) {
1669 dev_err(dev, "PMU type %d: Fail to map resource\n", type);
1670 return NULL;
1671 }
1672
1673 /* A PMU device node without enable-bit-index is always enabled */
1674 if (of_property_read_u32(np, "enable-bit-index", &enable_bit))
1675 enable_bit = 0;
1676
1677 ctx->name = xgene_pmu_dev_name(dev, type, enable_bit);
1678 if (!ctx->name) {
1679 dev_err(dev, "PMU type %d: Fail to get device name\n", type);
1680 return NULL;
1681 }
1682
1683 inf = &ctx->inf;
1684 inf->type = type;
1685 inf->csr = dev_csr;
1686 inf->enable_mask = 1 << enable_bit;
1687
1688 return ctx;
1689 }
1690
fdt_pmu_probe_pmu_dev(struct xgene_pmu * xgene_pmu,struct platform_device * pdev)1691 static int fdt_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
1692 struct platform_device *pdev)
1693 {
1694 struct xgene_pmu_dev_ctx *ctx;
1695 struct device_node *np;
1696
1697 for_each_child_of_node(pdev->dev.of_node, np) {
1698 if (!of_device_is_available(np))
1699 continue;
1700
1701 if (of_device_is_compatible(np, "apm,xgene-pmu-l3c"))
1702 ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_L3C);
1703 else if (of_device_is_compatible(np, "apm,xgene-pmu-iob"))
1704 ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_IOB);
1705 else if (of_device_is_compatible(np, "apm,xgene-pmu-mcb"))
1706 ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_MCB);
1707 else if (of_device_is_compatible(np, "apm,xgene-pmu-mc"))
1708 ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_MC);
1709 else
1710 ctx = NULL;
1711
1712 if (!ctx)
1713 continue;
1714
1715 if (xgene_pmu_dev_add(xgene_pmu, ctx)) {
1716 /* Can't add the PMU device, skip it */
1717 devm_kfree(xgene_pmu->dev, ctx);
1718 continue;
1719 }
1720
1721 switch (ctx->inf.type) {
1722 case PMU_TYPE_L3C:
1723 list_add(&ctx->next, &xgene_pmu->l3cpmus);
1724 break;
1725 case PMU_TYPE_IOB:
1726 list_add(&ctx->next, &xgene_pmu->iobpmus);
1727 break;
1728 case PMU_TYPE_IOB_SLOW:
1729 list_add(&ctx->next, &xgene_pmu->iobpmus);
1730 break;
1731 case PMU_TYPE_MCB:
1732 list_add(&ctx->next, &xgene_pmu->mcbpmus);
1733 break;
1734 case PMU_TYPE_MC:
1735 list_add(&ctx->next, &xgene_pmu->mcpmus);
1736 break;
1737 }
1738 }
1739
1740 return 0;
1741 }
1742
xgene_pmu_probe_pmu_dev(struct xgene_pmu * xgene_pmu,struct platform_device * pdev)1743 static int xgene_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
1744 struct platform_device *pdev)
1745 {
1746 if (has_acpi_companion(&pdev->dev))
1747 return acpi_pmu_probe_pmu_dev(xgene_pmu, pdev);
1748 return fdt_pmu_probe_pmu_dev(xgene_pmu, pdev);
1749 }
1750
1751 static const struct xgene_pmu_data xgene_pmu_data = {
1752 .id = PCP_PMU_V1,
1753 };
1754
1755 static const struct xgene_pmu_data xgene_pmu_v2_data = {
1756 .id = PCP_PMU_V2,
1757 };
1758
1759 static const struct xgene_pmu_ops xgene_pmu_ops = {
1760 .mask_int = xgene_pmu_mask_int,
1761 .unmask_int = xgene_pmu_unmask_int,
1762 .read_counter = xgene_pmu_read_counter32,
1763 .write_counter = xgene_pmu_write_counter32,
1764 .write_evttype = xgene_pmu_write_evttype,
1765 .write_agentmsk = xgene_pmu_write_agentmsk,
1766 .write_agent1msk = xgene_pmu_write_agent1msk,
1767 .enable_counter = xgene_pmu_enable_counter,
1768 .disable_counter = xgene_pmu_disable_counter,
1769 .enable_counter_int = xgene_pmu_enable_counter_int,
1770 .disable_counter_int = xgene_pmu_disable_counter_int,
1771 .reset_counters = xgene_pmu_reset_counters,
1772 .start_counters = xgene_pmu_start_counters,
1773 .stop_counters = xgene_pmu_stop_counters,
1774 };
1775
1776 static const struct xgene_pmu_ops xgene_pmu_v3_ops = {
1777 .mask_int = xgene_pmu_v3_mask_int,
1778 .unmask_int = xgene_pmu_v3_unmask_int,
1779 .read_counter = xgene_pmu_read_counter64,
1780 .write_counter = xgene_pmu_write_counter64,
1781 .write_evttype = xgene_pmu_write_evttype,
1782 .write_agentmsk = xgene_pmu_v3_write_agentmsk,
1783 .write_agent1msk = xgene_pmu_v3_write_agent1msk,
1784 .enable_counter = xgene_pmu_enable_counter,
1785 .disable_counter = xgene_pmu_disable_counter,
1786 .enable_counter_int = xgene_pmu_enable_counter_int,
1787 .disable_counter_int = xgene_pmu_disable_counter_int,
1788 .reset_counters = xgene_pmu_reset_counters,
1789 .start_counters = xgene_pmu_start_counters,
1790 .stop_counters = xgene_pmu_stop_counters,
1791 };
1792
1793 static const struct of_device_id xgene_pmu_of_match[] = {
1794 { .compatible = "apm,xgene-pmu", .data = &xgene_pmu_data },
1795 { .compatible = "apm,xgene-pmu-v2", .data = &xgene_pmu_v2_data },
1796 {},
1797 };
1798 MODULE_DEVICE_TABLE(of, xgene_pmu_of_match);
1799 #ifdef CONFIG_ACPI
1800 static const struct acpi_device_id xgene_pmu_acpi_match[] = {
1801 {"APMC0D5B", PCP_PMU_V1},
1802 {"APMC0D5C", PCP_PMU_V2},
1803 {"APMC0D83", PCP_PMU_V3},
1804 {},
1805 };
1806 MODULE_DEVICE_TABLE(acpi, xgene_pmu_acpi_match);
1807 #endif
1808
xgene_pmu_probe(struct platform_device * pdev)1809 static int xgene_pmu_probe(struct platform_device *pdev)
1810 {
1811 const struct xgene_pmu_data *dev_data;
1812 const struct of_device_id *of_id;
1813 struct xgene_pmu *xgene_pmu;
1814 struct resource *res;
1815 int irq, rc;
1816 int version;
1817
1818 xgene_pmu = devm_kzalloc(&pdev->dev, sizeof(*xgene_pmu), GFP_KERNEL);
1819 if (!xgene_pmu)
1820 return -ENOMEM;
1821 xgene_pmu->dev = &pdev->dev;
1822 platform_set_drvdata(pdev, xgene_pmu);
1823
1824 version = -EINVAL;
1825 of_id = of_match_device(xgene_pmu_of_match, &pdev->dev);
1826 if (of_id) {
1827 dev_data = (const struct xgene_pmu_data *) of_id->data;
1828 version = dev_data->id;
1829 }
1830
1831 #ifdef CONFIG_ACPI
1832 if (ACPI_COMPANION(&pdev->dev)) {
1833 const struct acpi_device_id *acpi_id;
1834
1835 acpi_id = acpi_match_device(xgene_pmu_acpi_match, &pdev->dev);
1836 if (acpi_id)
1837 version = (int) acpi_id->driver_data;
1838 }
1839 #endif
1840 if (version < 0)
1841 return -ENODEV;
1842
1843 if (version == PCP_PMU_V3)
1844 xgene_pmu->ops = &xgene_pmu_v3_ops;
1845 else
1846 xgene_pmu->ops = &xgene_pmu_ops;
1847
1848 INIT_LIST_HEAD(&xgene_pmu->l3cpmus);
1849 INIT_LIST_HEAD(&xgene_pmu->iobpmus);
1850 INIT_LIST_HEAD(&xgene_pmu->mcbpmus);
1851 INIT_LIST_HEAD(&xgene_pmu->mcpmus);
1852
1853 xgene_pmu->version = version;
1854 dev_info(&pdev->dev, "X-Gene PMU version %d\n", xgene_pmu->version);
1855
1856 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1857 xgene_pmu->pcppmu_csr = devm_ioremap_resource(&pdev->dev, res);
1858 if (IS_ERR(xgene_pmu->pcppmu_csr)) {
1859 dev_err(&pdev->dev, "ioremap failed for PCP PMU resource\n");
1860 return PTR_ERR(xgene_pmu->pcppmu_csr);
1861 }
1862
1863 irq = platform_get_irq(pdev, 0);
1864 if (irq < 0) {
1865 dev_err(&pdev->dev, "No IRQ resource\n");
1866 return -EINVAL;
1867 }
1868 rc = devm_request_irq(&pdev->dev, irq, xgene_pmu_isr,
1869 IRQF_NOBALANCING | IRQF_NO_THREAD,
1870 dev_name(&pdev->dev), xgene_pmu);
1871 if (rc) {
1872 dev_err(&pdev->dev, "Could not request IRQ %d\n", irq);
1873 return rc;
1874 }
1875
1876 raw_spin_lock_init(&xgene_pmu->lock);
1877
1878 /* Check for active MCBs and MCUs */
1879 rc = xgene_pmu_probe_active_mcb_mcu_l3c(xgene_pmu, pdev);
1880 if (rc) {
1881 dev_warn(&pdev->dev, "Unknown MCB/MCU active status\n");
1882 xgene_pmu->mcb_active_mask = 0x1;
1883 xgene_pmu->mc_active_mask = 0x1;
1884 }
1885
1886 /* Pick one core to use for cpumask attributes */
1887 cpumask_set_cpu(smp_processor_id(), &xgene_pmu->cpu);
1888
1889 /* Make sure that the overflow interrupt is handled by this CPU */
1890 rc = irq_set_affinity(irq, &xgene_pmu->cpu);
1891 if (rc) {
1892 dev_err(&pdev->dev, "Failed to set interrupt affinity!\n");
1893 return rc;
1894 }
1895
1896 /* Walk through the tree for all PMU perf devices */
1897 rc = xgene_pmu_probe_pmu_dev(xgene_pmu, pdev);
1898 if (rc) {
1899 dev_err(&pdev->dev, "No PMU perf devices found!\n");
1900 return rc;
1901 }
1902
1903 /* Enable interrupt */
1904 xgene_pmu->ops->unmask_int(xgene_pmu);
1905
1906 return 0;
1907 }
1908
1909 static void
xgene_pmu_dev_cleanup(struct xgene_pmu * xgene_pmu,struct list_head * pmus)1910 xgene_pmu_dev_cleanup(struct xgene_pmu *xgene_pmu, struct list_head *pmus)
1911 {
1912 struct xgene_pmu_dev_ctx *ctx;
1913
1914 list_for_each_entry(ctx, pmus, next) {
1915 perf_pmu_unregister(&ctx->pmu_dev->pmu);
1916 }
1917 }
1918
xgene_pmu_remove(struct platform_device * pdev)1919 static int xgene_pmu_remove(struct platform_device *pdev)
1920 {
1921 struct xgene_pmu *xgene_pmu = dev_get_drvdata(&pdev->dev);
1922
1923 xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->l3cpmus);
1924 xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->iobpmus);
1925 xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->mcbpmus);
1926 xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->mcpmus);
1927
1928 return 0;
1929 }
1930
1931 static struct platform_driver xgene_pmu_driver = {
1932 .probe = xgene_pmu_probe,
1933 .remove = xgene_pmu_remove,
1934 .driver = {
1935 .name = "xgene-pmu",
1936 .of_match_table = xgene_pmu_of_match,
1937 .acpi_match_table = ACPI_PTR(xgene_pmu_acpi_match),
1938 },
1939 };
1940
1941 builtin_platform_driver(xgene_pmu_driver);
1942
