tjh.dev
Linux kernel mirror (for testing)
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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * APM X-Gene SoC PMU (Performance Monitor Unit)
4 *
5 * Copyright (c) 2016, Applied Micro Circuits Corporation
6 * Author: Hoan Tran <hotran@apm.com>
7 * Tai Nguyen <ttnguyen@apm.com>
8 */
9
10#include <linux/acpi.h>
11#include <linux/clk.h>
12#include <linux/cpuhotplug.h>
13#include <linux/cpumask.h>
14#include <linux/interrupt.h>
15#include <linux/io.h>
16#include <linux/mfd/syscon.h>
17#include <linux/module.h>
18#include <linux/of_address.h>
19#include <linux/perf_event.h>
20#include <linux/platform_device.h>
21#include <linux/property.h>
22#include <linux/regmap.h>
23#include <linux/slab.h>
24
25#define CSW_CSWCR 0x0000
26#define CSW_CSWCR_DUALMCB_MASK BIT(0)
27#define CSW_CSWCR_MCB0_ROUTING(x) (((x) & 0x0C) >> 2)
28#define CSW_CSWCR_MCB1_ROUTING(x) (((x) & 0x30) >> 4)
29#define MCBADDRMR 0x0000
30#define MCBADDRMR_DUALMCU_MODE_MASK BIT(2)
31
32#define PCPPMU_INTSTATUS_REG 0x000
33#define PCPPMU_INTMASK_REG 0x004
34#define PCPPMU_INTMASK 0x0000000F
35#define PCPPMU_INTENMASK 0xFFFFFFFF
36#define PCPPMU_INTCLRMASK 0xFFFFFFF0
37#define PCPPMU_INT_MCU BIT(0)
38#define PCPPMU_INT_MCB BIT(1)
39#define PCPPMU_INT_L3C BIT(2)
40#define PCPPMU_INT_IOB BIT(3)
41
42#define PCPPMU_V3_INTMASK 0x00FF33FF
43#define PCPPMU_V3_INTENMASK 0xFFFFFFFF
44#define PCPPMU_V3_INTCLRMASK 0xFF00CC00
45#define PCPPMU_V3_INT_MCU 0x000000FF
46#define PCPPMU_V3_INT_MCB 0x00000300
47#define PCPPMU_V3_INT_L3C 0x00FF0000
48#define PCPPMU_V3_INT_IOB 0x00003000
49
50#define PMU_MAX_COUNTERS 4
51#define PMU_CNT_MAX_PERIOD 0xFFFFFFFFULL
52#define PMU_V3_CNT_MAX_PERIOD 0xFFFFFFFFFFFFFFFFULL
53#define PMU_OVERFLOW_MASK 0xF
54#define PMU_PMCR_E BIT(0)
55#define PMU_PMCR_P BIT(1)
56
57#define PMU_PMEVCNTR0 0x000
58#define PMU_PMEVCNTR1 0x004
59#define PMU_PMEVCNTR2 0x008
60#define PMU_PMEVCNTR3 0x00C
61#define PMU_PMEVTYPER0 0x400
62#define PMU_PMEVTYPER1 0x404
63#define PMU_PMEVTYPER2 0x408
64#define PMU_PMEVTYPER3 0x40C
65#define PMU_PMAMR0 0xA00
66#define PMU_PMAMR1 0xA04
67#define PMU_PMCNTENSET 0xC00
68#define PMU_PMCNTENCLR 0xC20
69#define PMU_PMINTENSET 0xC40
70#define PMU_PMINTENCLR 0xC60
71#define PMU_PMOVSR 0xC80
72#define PMU_PMCR 0xE04
73
74/* PMU registers for V3 */
75#define PMU_PMOVSCLR 0xC80
76#define PMU_PMOVSSET 0xCC0
77
78#define to_pmu_dev(p) container_of(p, struct xgene_pmu_dev, pmu)
79#define GET_CNTR(ev) (ev->hw.idx)
80#define GET_EVENTID(ev) (ev->hw.config & 0xFFULL)
81#define GET_AGENTID(ev) (ev->hw.config_base & 0xFFFFFFFFUL)
82#define GET_AGENT1ID(ev) ((ev->hw.config_base >> 32) & 0xFFFFFFFFUL)
83
84struct hw_pmu_info {
85 u32 type;
86 u32 enable_mask;
87 void __iomem *csr;
88};
89
90struct xgene_pmu_dev {
91 struct hw_pmu_info *inf;
92 struct xgene_pmu *parent;
93 struct pmu pmu;
94 u8 max_counters;
95 DECLARE_BITMAP(cntr_assign_mask, PMU_MAX_COUNTERS);
96 u64 max_period;
97 const struct attribute_group **attr_groups;
98 struct perf_event *pmu_counter_event[PMU_MAX_COUNTERS];
99};
100
101struct xgene_pmu_ops {
102 void (*mask_int)(struct xgene_pmu *pmu);
103 void (*unmask_int)(struct xgene_pmu *pmu);
104 u64 (*read_counter)(struct xgene_pmu_dev *pmu, int idx);
105 void (*write_counter)(struct xgene_pmu_dev *pmu, int idx, u64 val);
106 void (*write_evttype)(struct xgene_pmu_dev *pmu_dev, int idx, u32 val);
107 void (*write_agentmsk)(struct xgene_pmu_dev *pmu_dev, u32 val);
108 void (*write_agent1msk)(struct xgene_pmu_dev *pmu_dev, u32 val);
109 void (*enable_counter)(struct xgene_pmu_dev *pmu_dev, int idx);
110 void (*disable_counter)(struct xgene_pmu_dev *pmu_dev, int idx);
111 void (*enable_counter_int)(struct xgene_pmu_dev *pmu_dev, int idx);
112 void (*disable_counter_int)(struct xgene_pmu_dev *pmu_dev, int idx);
113 void (*reset_counters)(struct xgene_pmu_dev *pmu_dev);
114 void (*start_counters)(struct xgene_pmu_dev *pmu_dev);
115 void (*stop_counters)(struct xgene_pmu_dev *pmu_dev);
116};
117
118struct xgene_pmu {
119 struct device *dev;
120 struct hlist_node node;
121 int version;
122 void __iomem *pcppmu_csr;
123 u32 mcb_active_mask;
124 u32 mc_active_mask;
125 u32 l3c_active_mask;
126 cpumask_t cpu;
127 int irq;
128 raw_spinlock_t lock;
129 const struct xgene_pmu_ops *ops;
130 struct list_head l3cpmus;
131 struct list_head iobpmus;
132 struct list_head mcbpmus;
133 struct list_head mcpmus;
134};
135
136struct xgene_pmu_dev_ctx {
137 char *name;
138 struct list_head next;
139 struct xgene_pmu_dev *pmu_dev;
140 struct hw_pmu_info inf;
141};
142
143struct xgene_pmu_data {
144 int id;
145 u32 data;
146};
147
148enum xgene_pmu_version {
149 PCP_PMU_V1 = 1,
150 PCP_PMU_V2,
151 PCP_PMU_V3,
152};
153
154enum xgene_pmu_dev_type {
155 PMU_TYPE_L3C = 0,
156 PMU_TYPE_IOB,
157 PMU_TYPE_IOB_SLOW,
158 PMU_TYPE_MCB,
159 PMU_TYPE_MC,
160};
161
162/*
163 * sysfs format attributes
164 */
165static ssize_t xgene_pmu_format_show(struct device *dev,
166 struct device_attribute *attr, char *buf)
167{
168 struct dev_ext_attribute *eattr;
169
170 eattr = container_of(attr, struct dev_ext_attribute, attr);
171 return sysfs_emit(buf, "%s\n", (char *) eattr->var);
172}
173
174#define XGENE_PMU_FORMAT_ATTR(_name, _config) \
175 (&((struct dev_ext_attribute[]) { \
176 { .attr = __ATTR(_name, S_IRUGO, xgene_pmu_format_show, NULL), \
177 .var = (void *) _config, } \
178 })[0].attr.attr)
179
180static struct attribute *l3c_pmu_format_attrs[] = {
181 XGENE_PMU_FORMAT_ATTR(l3c_eventid, "config:0-7"),
182 XGENE_PMU_FORMAT_ATTR(l3c_agentid, "config1:0-9"),
183 NULL,
184};
185
186static struct attribute *iob_pmu_format_attrs[] = {
187 XGENE_PMU_FORMAT_ATTR(iob_eventid, "config:0-7"),
188 XGENE_PMU_FORMAT_ATTR(iob_agentid, "config1:0-63"),
189 NULL,
190};
191
192static struct attribute *mcb_pmu_format_attrs[] = {
193 XGENE_PMU_FORMAT_ATTR(mcb_eventid, "config:0-5"),
194 XGENE_PMU_FORMAT_ATTR(mcb_agentid, "config1:0-9"),
195 NULL,
196};
197
198static struct attribute *mc_pmu_format_attrs[] = {
199 XGENE_PMU_FORMAT_ATTR(mc_eventid, "config:0-28"),
200 NULL,
201};
202
203static const struct attribute_group l3c_pmu_format_attr_group = {
204 .name = "format",
205 .attrs = l3c_pmu_format_attrs,
206};
207
208static const struct attribute_group iob_pmu_format_attr_group = {
209 .name = "format",
210 .attrs = iob_pmu_format_attrs,
211};
212
213static const struct attribute_group mcb_pmu_format_attr_group = {
214 .name = "format",
215 .attrs = mcb_pmu_format_attrs,
216};
217
218static const struct attribute_group mc_pmu_format_attr_group = {
219 .name = "format",
220 .attrs = mc_pmu_format_attrs,
221};
222
223static struct attribute *l3c_pmu_v3_format_attrs[] = {
224 XGENE_PMU_FORMAT_ATTR(l3c_eventid, "config:0-39"),
225 NULL,
226};
227
228static struct attribute *iob_pmu_v3_format_attrs[] = {
229 XGENE_PMU_FORMAT_ATTR(iob_eventid, "config:0-47"),
230 NULL,
231};
232
233static struct attribute *iob_slow_pmu_v3_format_attrs[] = {
234 XGENE_PMU_FORMAT_ATTR(iob_slow_eventid, "config:0-16"),
235 NULL,
236};
237
238static struct attribute *mcb_pmu_v3_format_attrs[] = {
239 XGENE_PMU_FORMAT_ATTR(mcb_eventid, "config:0-35"),
240 NULL,
241};
242
243static struct attribute *mc_pmu_v3_format_attrs[] = {
244 XGENE_PMU_FORMAT_ATTR(mc_eventid, "config:0-44"),
245 NULL,
246};
247
248static const struct attribute_group l3c_pmu_v3_format_attr_group = {
249 .name = "format",
250 .attrs = l3c_pmu_v3_format_attrs,
251};
252
253static const struct attribute_group iob_pmu_v3_format_attr_group = {
254 .name = "format",
255 .attrs = iob_pmu_v3_format_attrs,
256};
257
258static const struct attribute_group iob_slow_pmu_v3_format_attr_group = {
259 .name = "format",
260 .attrs = iob_slow_pmu_v3_format_attrs,
261};
262
263static const struct attribute_group mcb_pmu_v3_format_attr_group = {
264 .name = "format",
265 .attrs = mcb_pmu_v3_format_attrs,
266};
267
268static const struct attribute_group mc_pmu_v3_format_attr_group = {
269 .name = "format",
270 .attrs = mc_pmu_v3_format_attrs,
271};
272
273/*
274 * sysfs event attributes
275 */
276static ssize_t xgene_pmu_event_show(struct device *dev,
277 struct device_attribute *attr, char *buf)
278{
279 struct perf_pmu_events_attr *pmu_attr =
280 container_of(attr, struct perf_pmu_events_attr, attr);
281
282 return sysfs_emit(buf, "config=0x%llx\n", pmu_attr->id);
283}
284
285#define XGENE_PMU_EVENT_ATTR(_name, _config) \
286 PMU_EVENT_ATTR_ID(_name, xgene_pmu_event_show, _config)
287
288static struct attribute *l3c_pmu_events_attrs[] = {
289 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
290 XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01),
291 XGENE_PMU_EVENT_ATTR(read-hit, 0x02),
292 XGENE_PMU_EVENT_ATTR(read-miss, 0x03),
293 XGENE_PMU_EVENT_ATTR(write-need-replacement, 0x06),
294 XGENE_PMU_EVENT_ATTR(write-not-need-replacement, 0x07),
295 XGENE_PMU_EVENT_ATTR(tq-full, 0x08),
296 XGENE_PMU_EVENT_ATTR(ackq-full, 0x09),
297 XGENE_PMU_EVENT_ATTR(wdb-full, 0x0a),
298 XGENE_PMU_EVENT_ATTR(bank-fifo-full, 0x0b),
299 XGENE_PMU_EVENT_ATTR(odb-full, 0x0c),
300 XGENE_PMU_EVENT_ATTR(wbq-full, 0x0d),
301 XGENE_PMU_EVENT_ATTR(bank-conflict-fifo-issue, 0x0e),
302 XGENE_PMU_EVENT_ATTR(bank-fifo-issue, 0x0f),
303 NULL,
304};
305
306static struct attribute *iob_pmu_events_attrs[] = {
307 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
308 XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01),
309 XGENE_PMU_EVENT_ATTR(axi0-read, 0x02),
310 XGENE_PMU_EVENT_ATTR(axi0-read-partial, 0x03),
311 XGENE_PMU_EVENT_ATTR(axi1-read, 0x04),
312 XGENE_PMU_EVENT_ATTR(axi1-read-partial, 0x05),
313 XGENE_PMU_EVENT_ATTR(csw-read-block, 0x06),
314 XGENE_PMU_EVENT_ATTR(csw-read-partial, 0x07),
315 XGENE_PMU_EVENT_ATTR(axi0-write, 0x10),
316 XGENE_PMU_EVENT_ATTR(axi0-write-partial, 0x11),
317 XGENE_PMU_EVENT_ATTR(axi1-write, 0x13),
318 XGENE_PMU_EVENT_ATTR(axi1-write-partial, 0x14),
319 XGENE_PMU_EVENT_ATTR(csw-inbound-dirty, 0x16),
320 NULL,
321};
322
323static struct attribute *mcb_pmu_events_attrs[] = {
324 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
325 XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01),
326 XGENE_PMU_EVENT_ATTR(csw-read, 0x02),
327 XGENE_PMU_EVENT_ATTR(csw-write-request, 0x03),
328 XGENE_PMU_EVENT_ATTR(mcb-csw-stall, 0x04),
329 XGENE_PMU_EVENT_ATTR(cancel-read-gack, 0x05),
330 NULL,
331};
332
333static struct attribute *mc_pmu_events_attrs[] = {
334 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
335 XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01),
336 XGENE_PMU_EVENT_ATTR(act-cmd-sent, 0x02),
337 XGENE_PMU_EVENT_ATTR(pre-cmd-sent, 0x03),
338 XGENE_PMU_EVENT_ATTR(rd-cmd-sent, 0x04),
339 XGENE_PMU_EVENT_ATTR(rda-cmd-sent, 0x05),
340 XGENE_PMU_EVENT_ATTR(wr-cmd-sent, 0x06),
341 XGENE_PMU_EVENT_ATTR(wra-cmd-sent, 0x07),
342 XGENE_PMU_EVENT_ATTR(pde-cmd-sent, 0x08),
343 XGENE_PMU_EVENT_ATTR(sre-cmd-sent, 0x09),
344 XGENE_PMU_EVENT_ATTR(prea-cmd-sent, 0x0a),
345 XGENE_PMU_EVENT_ATTR(ref-cmd-sent, 0x0b),
346 XGENE_PMU_EVENT_ATTR(rd-rda-cmd-sent, 0x0c),
347 XGENE_PMU_EVENT_ATTR(wr-wra-cmd-sent, 0x0d),
348 XGENE_PMU_EVENT_ATTR(in-rd-collision, 0x0e),
349 XGENE_PMU_EVENT_ATTR(in-wr-collision, 0x0f),
350 XGENE_PMU_EVENT_ATTR(collision-queue-not-empty, 0x10),
351 XGENE_PMU_EVENT_ATTR(collision-queue-full, 0x11),
352 XGENE_PMU_EVENT_ATTR(mcu-request, 0x12),
353 XGENE_PMU_EVENT_ATTR(mcu-rd-request, 0x13),
354 XGENE_PMU_EVENT_ATTR(mcu-hp-rd-request, 0x14),
355 XGENE_PMU_EVENT_ATTR(mcu-wr-request, 0x15),
356 XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-all, 0x16),
357 XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-cancel, 0x17),
358 XGENE_PMU_EVENT_ATTR(mcu-rd-response, 0x18),
359 XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-speculative-all, 0x19),
360 XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-speculative-cancel, 0x1a),
361 XGENE_PMU_EVENT_ATTR(mcu-wr-proceed-all, 0x1b),
362 XGENE_PMU_EVENT_ATTR(mcu-wr-proceed-cancel, 0x1c),
363 NULL,
364};
365
366static const struct attribute_group l3c_pmu_events_attr_group = {
367 .name = "events",
368 .attrs = l3c_pmu_events_attrs,
369};
370
371static const struct attribute_group iob_pmu_events_attr_group = {
372 .name = "events",
373 .attrs = iob_pmu_events_attrs,
374};
375
376static const struct attribute_group mcb_pmu_events_attr_group = {
377 .name = "events",
378 .attrs = mcb_pmu_events_attrs,
379};
380
381static const struct attribute_group mc_pmu_events_attr_group = {
382 .name = "events",
383 .attrs = mc_pmu_events_attrs,
384};
385
386static struct attribute *l3c_pmu_v3_events_attrs[] = {
387 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
388 XGENE_PMU_EVENT_ATTR(read-hit, 0x01),
389 XGENE_PMU_EVENT_ATTR(read-miss, 0x02),
390 XGENE_PMU_EVENT_ATTR(index-flush-eviction, 0x03),
391 XGENE_PMU_EVENT_ATTR(write-caused-replacement, 0x04),
392 XGENE_PMU_EVENT_ATTR(write-not-caused-replacement, 0x05),
393 XGENE_PMU_EVENT_ATTR(clean-eviction, 0x06),
394 XGENE_PMU_EVENT_ATTR(dirty-eviction, 0x07),
395 XGENE_PMU_EVENT_ATTR(read, 0x08),
396 XGENE_PMU_EVENT_ATTR(write, 0x09),
397 XGENE_PMU_EVENT_ATTR(request, 0x0a),
398 XGENE_PMU_EVENT_ATTR(tq-bank-conflict-issue-stall, 0x0b),
399 XGENE_PMU_EVENT_ATTR(tq-full, 0x0c),
400 XGENE_PMU_EVENT_ATTR(ackq-full, 0x0d),
401 XGENE_PMU_EVENT_ATTR(wdb-full, 0x0e),
402 XGENE_PMU_EVENT_ATTR(odb-full, 0x10),
403 XGENE_PMU_EVENT_ATTR(wbq-full, 0x11),
404 XGENE_PMU_EVENT_ATTR(input-req-async-fifo-stall, 0x12),
405 XGENE_PMU_EVENT_ATTR(output-req-async-fifo-stall, 0x13),
406 XGENE_PMU_EVENT_ATTR(output-data-async-fifo-stall, 0x14),
407 XGENE_PMU_EVENT_ATTR(total-insertion, 0x15),
408 XGENE_PMU_EVENT_ATTR(sip-insertions-r-set, 0x16),
409 XGENE_PMU_EVENT_ATTR(sip-insertions-r-clear, 0x17),
410 XGENE_PMU_EVENT_ATTR(dip-insertions-r-set, 0x18),
411 XGENE_PMU_EVENT_ATTR(dip-insertions-r-clear, 0x19),
412 XGENE_PMU_EVENT_ATTR(dip-insertions-force-r-set, 0x1a),
413 XGENE_PMU_EVENT_ATTR(egression, 0x1b),
414 XGENE_PMU_EVENT_ATTR(replacement, 0x1c),
415 XGENE_PMU_EVENT_ATTR(old-replacement, 0x1d),
416 XGENE_PMU_EVENT_ATTR(young-replacement, 0x1e),
417 XGENE_PMU_EVENT_ATTR(r-set-replacement, 0x1f),
418 XGENE_PMU_EVENT_ATTR(r-clear-replacement, 0x20),
419 XGENE_PMU_EVENT_ATTR(old-r-replacement, 0x21),
420 XGENE_PMU_EVENT_ATTR(old-nr-replacement, 0x22),
421 XGENE_PMU_EVENT_ATTR(young-r-replacement, 0x23),
422 XGENE_PMU_EVENT_ATTR(young-nr-replacement, 0x24),
423 XGENE_PMU_EVENT_ATTR(bloomfilter-clearing, 0x25),
424 XGENE_PMU_EVENT_ATTR(generation-flip, 0x26),
425 XGENE_PMU_EVENT_ATTR(vcc-droop-detected, 0x27),
426 NULL,
427};
428
429static struct attribute *iob_fast_pmu_v3_events_attrs[] = {
430 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
431 XGENE_PMU_EVENT_ATTR(pa-req-buf-alloc-all, 0x01),
432 XGENE_PMU_EVENT_ATTR(pa-req-buf-alloc-rd, 0x02),
433 XGENE_PMU_EVENT_ATTR(pa-req-buf-alloc-wr, 0x03),
434 XGENE_PMU_EVENT_ATTR(pa-all-cp-req, 0x04),
435 XGENE_PMU_EVENT_ATTR(pa-cp-blk-req, 0x05),
436 XGENE_PMU_EVENT_ATTR(pa-cp-ptl-req, 0x06),
437 XGENE_PMU_EVENT_ATTR(pa-cp-rd-req, 0x07),
438 XGENE_PMU_EVENT_ATTR(pa-cp-wr-req, 0x08),
439 XGENE_PMU_EVENT_ATTR(ba-all-req, 0x09),
440 XGENE_PMU_EVENT_ATTR(ba-rd-req, 0x0a),
441 XGENE_PMU_EVENT_ATTR(ba-wr-req, 0x0b),
442 XGENE_PMU_EVENT_ATTR(pa-rd-shared-req-issued, 0x10),
443 XGENE_PMU_EVENT_ATTR(pa-rd-exclusive-req-issued, 0x11),
444 XGENE_PMU_EVENT_ATTR(pa-wr-invalidate-req-issued-stashable, 0x12),
445 XGENE_PMU_EVENT_ATTR(pa-wr-invalidate-req-issued-nonstashable, 0x13),
446 XGENE_PMU_EVENT_ATTR(pa-wr-back-req-issued-stashable, 0x14),
447 XGENE_PMU_EVENT_ATTR(pa-wr-back-req-issued-nonstashable, 0x15),
448 XGENE_PMU_EVENT_ATTR(pa-ptl-wr-req, 0x16),
449 XGENE_PMU_EVENT_ATTR(pa-ptl-rd-req, 0x17),
450 XGENE_PMU_EVENT_ATTR(pa-wr-back-clean-data, 0x18),
451 XGENE_PMU_EVENT_ATTR(pa-wr-back-cancelled-on-SS, 0x1b),
452 XGENE_PMU_EVENT_ATTR(pa-barrier-occurrence, 0x1c),
453 XGENE_PMU_EVENT_ATTR(pa-barrier-cycles, 0x1d),
454 XGENE_PMU_EVENT_ATTR(pa-total-cp-snoops, 0x20),
455 XGENE_PMU_EVENT_ATTR(pa-rd-shared-snoop, 0x21),
456 XGENE_PMU_EVENT_ATTR(pa-rd-shared-snoop-hit, 0x22),
457 XGENE_PMU_EVENT_ATTR(pa-rd-exclusive-snoop, 0x23),
458 XGENE_PMU_EVENT_ATTR(pa-rd-exclusive-snoop-hit, 0x24),
459 XGENE_PMU_EVENT_ATTR(pa-rd-wr-invalid-snoop, 0x25),
460 XGENE_PMU_EVENT_ATTR(pa-rd-wr-invalid-snoop-hit, 0x26),
461 XGENE_PMU_EVENT_ATTR(pa-req-buffer-full, 0x28),
462 XGENE_PMU_EVENT_ATTR(cswlf-outbound-req-fifo-full, 0x29),
463 XGENE_PMU_EVENT_ATTR(cswlf-inbound-snoop-fifo-backpressure, 0x2a),
464 XGENE_PMU_EVENT_ATTR(cswlf-outbound-lack-fifo-full, 0x2b),
465 XGENE_PMU_EVENT_ATTR(cswlf-inbound-gack-fifo-backpressure, 0x2c),
466 XGENE_PMU_EVENT_ATTR(cswlf-outbound-data-fifo-full, 0x2d),
467 XGENE_PMU_EVENT_ATTR(cswlf-inbound-data-fifo-backpressure, 0x2e),
468 XGENE_PMU_EVENT_ATTR(cswlf-inbound-req-backpressure, 0x2f),
469 NULL,
470};
471
472static struct attribute *iob_slow_pmu_v3_events_attrs[] = {
473 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
474 XGENE_PMU_EVENT_ATTR(pa-axi0-rd-req, 0x01),
475 XGENE_PMU_EVENT_ATTR(pa-axi0-wr-req, 0x02),
476 XGENE_PMU_EVENT_ATTR(pa-axi1-rd-req, 0x03),
477 XGENE_PMU_EVENT_ATTR(pa-axi1-wr-req, 0x04),
478 XGENE_PMU_EVENT_ATTR(ba-all-axi-req, 0x07),
479 XGENE_PMU_EVENT_ATTR(ba-axi-rd-req, 0x08),
480 XGENE_PMU_EVENT_ATTR(ba-axi-wr-req, 0x09),
481 XGENE_PMU_EVENT_ATTR(ba-free-list-empty, 0x10),
482 NULL,
483};
484
485static struct attribute *mcb_pmu_v3_events_attrs[] = {
486 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
487 XGENE_PMU_EVENT_ATTR(req-receive, 0x01),
488 XGENE_PMU_EVENT_ATTR(rd-req-recv, 0x02),
489 XGENE_PMU_EVENT_ATTR(rd-req-recv-2, 0x03),
490 XGENE_PMU_EVENT_ATTR(wr-req-recv, 0x04),
491 XGENE_PMU_EVENT_ATTR(wr-req-recv-2, 0x05),
492 XGENE_PMU_EVENT_ATTR(rd-req-sent-to-mcu, 0x06),
493 XGENE_PMU_EVENT_ATTR(rd-req-sent-to-mcu-2, 0x07),
494 XGENE_PMU_EVENT_ATTR(rd-req-sent-to-spec-mcu, 0x08),
495 XGENE_PMU_EVENT_ATTR(rd-req-sent-to-spec-mcu-2, 0x09),
496 XGENE_PMU_EVENT_ATTR(glbl-ack-recv-for-rd-sent-to-spec-mcu, 0x0a),
497 XGENE_PMU_EVENT_ATTR(glbl-ack-go-recv-for-rd-sent-to-spec-mcu, 0x0b),
498 XGENE_PMU_EVENT_ATTR(glbl-ack-nogo-recv-for-rd-sent-to-spec-mcu, 0x0c),
499 XGENE_PMU_EVENT_ATTR(glbl-ack-go-recv-any-rd-req, 0x0d),
500 XGENE_PMU_EVENT_ATTR(glbl-ack-go-recv-any-rd-req-2, 0x0e),
501 XGENE_PMU_EVENT_ATTR(wr-req-sent-to-mcu, 0x0f),
502 XGENE_PMU_EVENT_ATTR(gack-recv, 0x10),
503 XGENE_PMU_EVENT_ATTR(rd-gack-recv, 0x11),
504 XGENE_PMU_EVENT_ATTR(wr-gack-recv, 0x12),
505 XGENE_PMU_EVENT_ATTR(cancel-rd-gack, 0x13),
506 XGENE_PMU_EVENT_ATTR(cancel-wr-gack, 0x14),
507 XGENE_PMU_EVENT_ATTR(mcb-csw-req-stall, 0x15),
508 XGENE_PMU_EVENT_ATTR(mcu-req-intf-blocked, 0x16),
509 XGENE_PMU_EVENT_ATTR(mcb-mcu-rd-intf-stall, 0x17),
510 XGENE_PMU_EVENT_ATTR(csw-rd-intf-blocked, 0x18),
511 XGENE_PMU_EVENT_ATTR(csw-local-ack-intf-blocked, 0x19),
512 XGENE_PMU_EVENT_ATTR(mcu-req-table-full, 0x1a),
513 XGENE_PMU_EVENT_ATTR(mcu-stat-table-full, 0x1b),
514 XGENE_PMU_EVENT_ATTR(mcu-wr-table-full, 0x1c),
515 XGENE_PMU_EVENT_ATTR(mcu-rdreceipt-resp, 0x1d),
516 XGENE_PMU_EVENT_ATTR(mcu-wrcomplete-resp, 0x1e),
517 XGENE_PMU_EVENT_ATTR(mcu-retryack-resp, 0x1f),
518 XGENE_PMU_EVENT_ATTR(mcu-pcrdgrant-resp, 0x20),
519 XGENE_PMU_EVENT_ATTR(mcu-req-from-lastload, 0x21),
520 XGENE_PMU_EVENT_ATTR(mcu-req-from-bypass, 0x22),
521 XGENE_PMU_EVENT_ATTR(volt-droop-detect, 0x23),
522 NULL,
523};
524
525static struct attribute *mc_pmu_v3_events_attrs[] = {
526 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
527 XGENE_PMU_EVENT_ATTR(act-sent, 0x01),
528 XGENE_PMU_EVENT_ATTR(pre-sent, 0x02),
529 XGENE_PMU_EVENT_ATTR(rd-sent, 0x03),
530 XGENE_PMU_EVENT_ATTR(rda-sent, 0x04),
531 XGENE_PMU_EVENT_ATTR(wr-sent, 0x05),
532 XGENE_PMU_EVENT_ATTR(wra-sent, 0x06),
533 XGENE_PMU_EVENT_ATTR(pd-entry-vld, 0x07),
534 XGENE_PMU_EVENT_ATTR(sref-entry-vld, 0x08),
535 XGENE_PMU_EVENT_ATTR(prea-sent, 0x09),
536 XGENE_PMU_EVENT_ATTR(ref-sent, 0x0a),
537 XGENE_PMU_EVENT_ATTR(rd-rda-sent, 0x0b),
538 XGENE_PMU_EVENT_ATTR(wr-wra-sent, 0x0c),
539 XGENE_PMU_EVENT_ATTR(raw-hazard, 0x0d),
540 XGENE_PMU_EVENT_ATTR(war-hazard, 0x0e),
541 XGENE_PMU_EVENT_ATTR(waw-hazard, 0x0f),
542 XGENE_PMU_EVENT_ATTR(rar-hazard, 0x10),
543 XGENE_PMU_EVENT_ATTR(raw-war-waw-hazard, 0x11),
544 XGENE_PMU_EVENT_ATTR(hprd-lprd-wr-req-vld, 0x12),
545 XGENE_PMU_EVENT_ATTR(lprd-req-vld, 0x13),
546 XGENE_PMU_EVENT_ATTR(hprd-req-vld, 0x14),
547 XGENE_PMU_EVENT_ATTR(hprd-lprd-req-vld, 0x15),
548 XGENE_PMU_EVENT_ATTR(wr-req-vld, 0x16),
549 XGENE_PMU_EVENT_ATTR(partial-wr-req-vld, 0x17),
550 XGENE_PMU_EVENT_ATTR(rd-retry, 0x18),
551 XGENE_PMU_EVENT_ATTR(wr-retry, 0x19),
552 XGENE_PMU_EVENT_ATTR(retry-gnt, 0x1a),
553 XGENE_PMU_EVENT_ATTR(rank-change, 0x1b),
554 XGENE_PMU_EVENT_ATTR(dir-change, 0x1c),
555 XGENE_PMU_EVENT_ATTR(rank-dir-change, 0x1d),
556 XGENE_PMU_EVENT_ATTR(rank-active, 0x1e),
557 XGENE_PMU_EVENT_ATTR(rank-idle, 0x1f),
558 XGENE_PMU_EVENT_ATTR(rank-pd, 0x20),
559 XGENE_PMU_EVENT_ATTR(rank-sref, 0x21),
560 XGENE_PMU_EVENT_ATTR(queue-fill-gt-thresh, 0x22),
561 XGENE_PMU_EVENT_ATTR(queue-rds-gt-thresh, 0x23),
562 XGENE_PMU_EVENT_ATTR(queue-wrs-gt-thresh, 0x24),
563 XGENE_PMU_EVENT_ATTR(phy-updt-complt, 0x25),
564 XGENE_PMU_EVENT_ATTR(tz-fail, 0x26),
565 XGENE_PMU_EVENT_ATTR(dram-errc, 0x27),
566 XGENE_PMU_EVENT_ATTR(dram-errd, 0x28),
567 XGENE_PMU_EVENT_ATTR(rd-enq, 0x29),
568 XGENE_PMU_EVENT_ATTR(wr-enq, 0x2a),
569 XGENE_PMU_EVENT_ATTR(tmac-limit-reached, 0x2b),
570 XGENE_PMU_EVENT_ATTR(tmaw-tracker-full, 0x2c),
571 NULL,
572};
573
574static const struct attribute_group l3c_pmu_v3_events_attr_group = {
575 .name = "events",
576 .attrs = l3c_pmu_v3_events_attrs,
577};
578
579static const struct attribute_group iob_fast_pmu_v3_events_attr_group = {
580 .name = "events",
581 .attrs = iob_fast_pmu_v3_events_attrs,
582};
583
584static const struct attribute_group iob_slow_pmu_v3_events_attr_group = {
585 .name = "events",
586 .attrs = iob_slow_pmu_v3_events_attrs,
587};
588
589static const struct attribute_group mcb_pmu_v3_events_attr_group = {
590 .name = "events",
591 .attrs = mcb_pmu_v3_events_attrs,
592};
593
594static const struct attribute_group mc_pmu_v3_events_attr_group = {
595 .name = "events",
596 .attrs = mc_pmu_v3_events_attrs,
597};
598
599/*
600 * sysfs cpumask attributes
601 */
602static ssize_t cpumask_show(struct device *dev,
603 struct device_attribute *attr, char *buf)
604{
605 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(dev_get_drvdata(dev));
606
607 return cpumap_print_to_pagebuf(true, buf, &pmu_dev->parent->cpu);
608}
609
610static DEVICE_ATTR_RO(cpumask);
611
612static struct attribute *xgene_pmu_cpumask_attrs[] = {
613 &dev_attr_cpumask.attr,
614 NULL,
615};
616
617static const struct attribute_group pmu_cpumask_attr_group = {
618 .attrs = xgene_pmu_cpumask_attrs,
619};
620
621/*
622 * Per PMU device attribute groups of PMU v1 and v2
623 */
624static const struct attribute_group *l3c_pmu_attr_groups[] = {
625 &l3c_pmu_format_attr_group,
626 &pmu_cpumask_attr_group,
627 &l3c_pmu_events_attr_group,
628 NULL
629};
630
631static const struct attribute_group *iob_pmu_attr_groups[] = {
632 &iob_pmu_format_attr_group,
633 &pmu_cpumask_attr_group,
634 &iob_pmu_events_attr_group,
635 NULL
636};
637
638static const struct attribute_group *mcb_pmu_attr_groups[] = {
639 &mcb_pmu_format_attr_group,
640 &pmu_cpumask_attr_group,
641 &mcb_pmu_events_attr_group,
642 NULL
643};
644
645static const struct attribute_group *mc_pmu_attr_groups[] = {
646 &mc_pmu_format_attr_group,
647 &pmu_cpumask_attr_group,
648 &mc_pmu_events_attr_group,
649 NULL
650};
651
652/*
653 * Per PMU device attribute groups of PMU v3
654 */
655static const struct attribute_group *l3c_pmu_v3_attr_groups[] = {
656 &l3c_pmu_v3_format_attr_group,
657 &pmu_cpumask_attr_group,
658 &l3c_pmu_v3_events_attr_group,
659 NULL
660};
661
662static const struct attribute_group *iob_fast_pmu_v3_attr_groups[] = {
663 &iob_pmu_v3_format_attr_group,
664 &pmu_cpumask_attr_group,
665 &iob_fast_pmu_v3_events_attr_group,
666 NULL
667};
668
669static const struct attribute_group *iob_slow_pmu_v3_attr_groups[] = {
670 &iob_slow_pmu_v3_format_attr_group,
671 &pmu_cpumask_attr_group,
672 &iob_slow_pmu_v3_events_attr_group,
673 NULL
674};
675
676static const struct attribute_group *mcb_pmu_v3_attr_groups[] = {
677 &mcb_pmu_v3_format_attr_group,
678 &pmu_cpumask_attr_group,
679 &mcb_pmu_v3_events_attr_group,
680 NULL
681};
682
683static const struct attribute_group *mc_pmu_v3_attr_groups[] = {
684 &mc_pmu_v3_format_attr_group,
685 &pmu_cpumask_attr_group,
686 &mc_pmu_v3_events_attr_group,
687 NULL
688};
689
690static int get_next_avail_cntr(struct xgene_pmu_dev *pmu_dev)
691{
692 int cntr;
693
694 cntr = find_first_zero_bit(pmu_dev->cntr_assign_mask,
695 pmu_dev->max_counters);
696 if (cntr == pmu_dev->max_counters)
697 return -ENOSPC;
698 set_bit(cntr, pmu_dev->cntr_assign_mask);
699
700 return cntr;
701}
702
703static void clear_avail_cntr(struct xgene_pmu_dev *pmu_dev, int cntr)
704{
705 clear_bit(cntr, pmu_dev->cntr_assign_mask);
706}
707
708static inline void xgene_pmu_mask_int(struct xgene_pmu *xgene_pmu)
709{
710 writel(PCPPMU_INTENMASK, xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG);
711}
712
713static inline void xgene_pmu_v3_mask_int(struct xgene_pmu *xgene_pmu)
714{
715 writel(PCPPMU_V3_INTENMASK, xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG);
716}
717
718static inline void xgene_pmu_unmask_int(struct xgene_pmu *xgene_pmu)
719{
720 writel(PCPPMU_INTCLRMASK, xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG);
721}
722
723static inline void xgene_pmu_v3_unmask_int(struct xgene_pmu *xgene_pmu)
724{
725 writel(PCPPMU_V3_INTCLRMASK,
726 xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG);
727}
728
729static inline u64 xgene_pmu_read_counter32(struct xgene_pmu_dev *pmu_dev,
730 int idx)
731{
732 return readl(pmu_dev->inf->csr + PMU_PMEVCNTR0 + (4 * idx));
733}
734
735static inline u64 xgene_pmu_read_counter64(struct xgene_pmu_dev *pmu_dev,
736 int idx)
737{
738 u32 lo, hi;
739
740 /*
741 * v3 has 64-bit counter registers composed by 2 32-bit registers
742 * This can be a problem if the counter increases and carries
743 * out of bit [31] between 2 reads. The extra reads would help
744 * to prevent this issue.
745 */
746 do {
747 hi = xgene_pmu_read_counter32(pmu_dev, 2 * idx + 1);
748 lo = xgene_pmu_read_counter32(pmu_dev, 2 * idx);
749 } while (hi != xgene_pmu_read_counter32(pmu_dev, 2 * idx + 1));
750
751 return (((u64)hi << 32) | lo);
752}
753
754static inline void
755xgene_pmu_write_counter32(struct xgene_pmu_dev *pmu_dev, int idx, u64 val)
756{
757 writel(val, pmu_dev->inf->csr + PMU_PMEVCNTR0 + (4 * idx));
758}
759
760static inline void
761xgene_pmu_write_counter64(struct xgene_pmu_dev *pmu_dev, int idx, u64 val)
762{
763 u32 cnt_lo, cnt_hi;
764
765 cnt_hi = upper_32_bits(val);
766 cnt_lo = lower_32_bits(val);
767
768 /* v3 has 64-bit counter registers composed by 2 32-bit registers */
769 xgene_pmu_write_counter32(pmu_dev, 2 * idx, cnt_lo);
770 xgene_pmu_write_counter32(pmu_dev, 2 * idx + 1, cnt_hi);
771}
772
773static inline void
774xgene_pmu_write_evttype(struct xgene_pmu_dev *pmu_dev, int idx, u32 val)
775{
776 writel(val, pmu_dev->inf->csr + PMU_PMEVTYPER0 + (4 * idx));
777}
778
779static inline void
780xgene_pmu_write_agentmsk(struct xgene_pmu_dev *pmu_dev, u32 val)
781{
782 writel(val, pmu_dev->inf->csr + PMU_PMAMR0);
783}
784
785static inline void
786xgene_pmu_v3_write_agentmsk(struct xgene_pmu_dev *pmu_dev, u32 val) { }
787
788static inline void
789xgene_pmu_write_agent1msk(struct xgene_pmu_dev *pmu_dev, u32 val)
790{
791 writel(val, pmu_dev->inf->csr + PMU_PMAMR1);
792}
793
794static inline void
795xgene_pmu_v3_write_agent1msk(struct xgene_pmu_dev *pmu_dev, u32 val) { }
796
797static inline void
798xgene_pmu_enable_counter(struct xgene_pmu_dev *pmu_dev, int idx)
799{
800 u32 val;
801
802 val = readl(pmu_dev->inf->csr + PMU_PMCNTENSET);
803 val |= 1 << idx;
804 writel(val, pmu_dev->inf->csr + PMU_PMCNTENSET);
805}
806
807static inline void
808xgene_pmu_disable_counter(struct xgene_pmu_dev *pmu_dev, int idx)
809{
810 u32 val;
811
812 val = readl(pmu_dev->inf->csr + PMU_PMCNTENCLR);
813 val |= 1 << idx;
814 writel(val, pmu_dev->inf->csr + PMU_PMCNTENCLR);
815}
816
817static inline void
818xgene_pmu_enable_counter_int(struct xgene_pmu_dev *pmu_dev, int idx)
819{
820 u32 val;
821
822 val = readl(pmu_dev->inf->csr + PMU_PMINTENSET);
823 val |= 1 << idx;
824 writel(val, pmu_dev->inf->csr + PMU_PMINTENSET);
825}
826
827static inline void
828xgene_pmu_disable_counter_int(struct xgene_pmu_dev *pmu_dev, int idx)
829{
830 u32 val;
831
832 val = readl(pmu_dev->inf->csr + PMU_PMINTENCLR);
833 val |= 1 << idx;
834 writel(val, pmu_dev->inf->csr + PMU_PMINTENCLR);
835}
836
837static inline void xgene_pmu_reset_counters(struct xgene_pmu_dev *pmu_dev)
838{
839 u32 val;
840
841 val = readl(pmu_dev->inf->csr + PMU_PMCR);
842 val |= PMU_PMCR_P;
843 writel(val, pmu_dev->inf->csr + PMU_PMCR);
844}
845
846static inline void xgene_pmu_start_counters(struct xgene_pmu_dev *pmu_dev)
847{
848 u32 val;
849
850 val = readl(pmu_dev->inf->csr + PMU_PMCR);
851 val |= PMU_PMCR_E;
852 writel(val, pmu_dev->inf->csr + PMU_PMCR);
853}
854
855static inline void xgene_pmu_stop_counters(struct xgene_pmu_dev *pmu_dev)
856{
857 u32 val;
858
859 val = readl(pmu_dev->inf->csr + PMU_PMCR);
860 val &= ~PMU_PMCR_E;
861 writel(val, pmu_dev->inf->csr + PMU_PMCR);
862}
863
864static void xgene_perf_pmu_enable(struct pmu *pmu)
865{
866 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(pmu);
867 struct xgene_pmu *xgene_pmu = pmu_dev->parent;
868 bool enabled = !bitmap_empty(pmu_dev->cntr_assign_mask,
869 pmu_dev->max_counters);
870
871 if (!enabled)
872 return;
873
874 xgene_pmu->ops->start_counters(pmu_dev);
875}
876
877static void xgene_perf_pmu_disable(struct pmu *pmu)
878{
879 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(pmu);
880 struct xgene_pmu *xgene_pmu = pmu_dev->parent;
881
882 xgene_pmu->ops->stop_counters(pmu_dev);
883}
884
885static int xgene_perf_event_init(struct perf_event *event)
886{
887 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
888 struct hw_perf_event *hw = &event->hw;
889 struct perf_event *sibling;
890
891 /* Test the event attr type check for PMU enumeration */
892 if (event->attr.type != event->pmu->type)
893 return -ENOENT;
894
895 /*
896 * SOC PMU counters are shared across all cores.
897 * Therefore, it does not support per-process mode.
898 * Also, it does not support event sampling mode.
899 */
900 if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK)
901 return -EINVAL;
902
903 if (event->cpu < 0)
904 return -EINVAL;
905 /*
906 * Many perf core operations (eg. events rotation) operate on a
907 * single CPU context. This is obvious for CPU PMUs, where one
908 * expects the same sets of events being observed on all CPUs,
909 * but can lead to issues for off-core PMUs, where each
910 * event could be theoretically assigned to a different CPU. To
911 * mitigate this, we enforce CPU assignment to one, selected
912 * processor (the one described in the "cpumask" attribute).
913 */
914 event->cpu = cpumask_first(&pmu_dev->parent->cpu);
915
916 hw->config = event->attr.config;
917 /*
918 * Each bit of the config1 field represents an agent from which the
919 * request of the event come. The event is counted only if it's caused
920 * by a request of an agent has the bit cleared.
921 * By default, the event is counted for all agents.
922 */
923 hw->config_base = event->attr.config1;
924
925 /*
926 * We must NOT create groups containing mixed PMUs, although software
927 * events are acceptable
928 */
929 if (event->group_leader->pmu != event->pmu &&
930 !is_software_event(event->group_leader))
931 return -EINVAL;
932
933 for_each_sibling_event(sibling, event->group_leader) {
934 if (sibling->pmu != event->pmu &&
935 !is_software_event(sibling))
936 return -EINVAL;
937 }
938
939 return 0;
940}
941
942static void xgene_perf_enable_event(struct perf_event *event)
943{
944 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
945 struct xgene_pmu *xgene_pmu = pmu_dev->parent;
946
947 xgene_pmu->ops->write_evttype(pmu_dev, GET_CNTR(event),
948 GET_EVENTID(event));
949 xgene_pmu->ops->write_agentmsk(pmu_dev, ~((u32)GET_AGENTID(event)));
950 if (pmu_dev->inf->type == PMU_TYPE_IOB)
951 xgene_pmu->ops->write_agent1msk(pmu_dev,
952 ~((u32)GET_AGENT1ID(event)));
953
954 xgene_pmu->ops->enable_counter(pmu_dev, GET_CNTR(event));
955 xgene_pmu->ops->enable_counter_int(pmu_dev, GET_CNTR(event));
956}
957
958static void xgene_perf_disable_event(struct perf_event *event)
959{
960 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
961 struct xgene_pmu *xgene_pmu = pmu_dev->parent;
962
963 xgene_pmu->ops->disable_counter(pmu_dev, GET_CNTR(event));
964 xgene_pmu->ops->disable_counter_int(pmu_dev, GET_CNTR(event));
965}
966
967static void xgene_perf_event_set_period(struct perf_event *event)
968{
969 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
970 struct xgene_pmu *xgene_pmu = pmu_dev->parent;
971 struct hw_perf_event *hw = &event->hw;
972 /*
973 * For 32 bit counter, it has a period of 2^32. To account for the
974 * possibility of extreme interrupt latency we program for a period of
975 * half that. Hopefully, we can handle the interrupt before another 2^31
976 * events occur and the counter overtakes its previous value.
977 * For 64 bit counter, we don't expect it overflow.
978 */
979 u64 val = 1ULL << 31;
980
981 local64_set(&hw->prev_count, val);
982 xgene_pmu->ops->write_counter(pmu_dev, hw->idx, val);
983}
984
985static void xgene_perf_event_update(struct perf_event *event)
986{
987 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
988 struct xgene_pmu *xgene_pmu = pmu_dev->parent;
989 struct hw_perf_event *hw = &event->hw;
990 u64 delta, prev_raw_count, new_raw_count;
991
992again:
993 prev_raw_count = local64_read(&hw->prev_count);
994 new_raw_count = xgene_pmu->ops->read_counter(pmu_dev, GET_CNTR(event));
995
996 if (local64_cmpxchg(&hw->prev_count, prev_raw_count,
997 new_raw_count) != prev_raw_count)
998 goto again;
999
1000 delta = (new_raw_count - prev_raw_count) & pmu_dev->max_period;
1001
1002 local64_add(delta, &event->count);
1003}
1004
1005static void xgene_perf_read(struct perf_event *event)
1006{
1007 xgene_perf_event_update(event);
1008}
1009
1010static void xgene_perf_start(struct perf_event *event, int flags)
1011{
1012 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
1013 struct xgene_pmu *xgene_pmu = pmu_dev->parent;
1014 struct hw_perf_event *hw = &event->hw;
1015
1016 if (WARN_ON_ONCE(!(hw->state & PERF_HES_STOPPED)))
1017 return;
1018
1019 WARN_ON_ONCE(!(hw->state & PERF_HES_UPTODATE));
1020 hw->state = 0;
1021
1022 xgene_perf_event_set_period(event);
1023
1024 if (flags & PERF_EF_RELOAD) {
1025 u64 prev_raw_count = local64_read(&hw->prev_count);
1026
1027 xgene_pmu->ops->write_counter(pmu_dev, GET_CNTR(event),
1028 prev_raw_count);
1029 }
1030
1031 xgene_perf_enable_event(event);
1032 perf_event_update_userpage(event);
1033}
1034
1035static void xgene_perf_stop(struct perf_event *event, int flags)
1036{
1037 struct hw_perf_event *hw = &event->hw;
1038
1039 if (hw->state & PERF_HES_UPTODATE)
1040 return;
1041
1042 xgene_perf_disable_event(event);
1043 WARN_ON_ONCE(hw->state & PERF_HES_STOPPED);
1044 hw->state |= PERF_HES_STOPPED;
1045
1046 if (hw->state & PERF_HES_UPTODATE)
1047 return;
1048
1049 xgene_perf_read(event);
1050 hw->state |= PERF_HES_UPTODATE;
1051}
1052
1053static int xgene_perf_add(struct perf_event *event, int flags)
1054{
1055 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
1056 struct hw_perf_event *hw = &event->hw;
1057
1058 hw->state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
1059
1060 /* Allocate an event counter */
1061 hw->idx = get_next_avail_cntr(pmu_dev);
1062 if (hw->idx < 0)
1063 return -EAGAIN;
1064
1065 /* Update counter event pointer for Interrupt handler */
1066 pmu_dev->pmu_counter_event[hw->idx] = event;
1067
1068 if (flags & PERF_EF_START)
1069 xgene_perf_start(event, PERF_EF_RELOAD);
1070
1071 return 0;
1072}
1073
1074static void xgene_perf_del(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 xgene_perf_stop(event, PERF_EF_UPDATE);
1080
1081 /* clear the assigned counter */
1082 clear_avail_cntr(pmu_dev, GET_CNTR(event));
1083
1084 perf_event_update_userpage(event);
1085 pmu_dev->pmu_counter_event[hw->idx] = NULL;
1086}
1087
1088static int xgene_init_perf(struct xgene_pmu_dev *pmu_dev, char *name)
1089{
1090 struct xgene_pmu *xgene_pmu;
1091
1092 if (pmu_dev->parent->version == PCP_PMU_V3)
1093 pmu_dev->max_period = PMU_V3_CNT_MAX_PERIOD;
1094 else
1095 pmu_dev->max_period = PMU_CNT_MAX_PERIOD;
1096 /* First version PMU supports only single event counter */
1097 xgene_pmu = pmu_dev->parent;
1098 if (xgene_pmu->version == PCP_PMU_V1)
1099 pmu_dev->max_counters = 1;
1100 else
1101 pmu_dev->max_counters = PMU_MAX_COUNTERS;
1102
1103 /* Perf driver registration */
1104 pmu_dev->pmu = (struct pmu) {
1105 .attr_groups = pmu_dev->attr_groups,
1106 .task_ctx_nr = perf_invalid_context,
1107 .pmu_enable = xgene_perf_pmu_enable,
1108 .pmu_disable = xgene_perf_pmu_disable,
1109 .event_init = xgene_perf_event_init,
1110 .add = xgene_perf_add,
1111 .del = xgene_perf_del,
1112 .start = xgene_perf_start,
1113 .stop = xgene_perf_stop,
1114 .read = xgene_perf_read,
1115 .capabilities = PERF_PMU_CAP_NO_EXCLUDE,
1116 };
1117
1118 /* Hardware counter init */
1119 xgene_pmu->ops->stop_counters(pmu_dev);
1120 xgene_pmu->ops->reset_counters(pmu_dev);
1121
1122 return perf_pmu_register(&pmu_dev->pmu, name, -1);
1123}
1124
1125static int
1126xgene_pmu_dev_add(struct xgene_pmu *xgene_pmu, struct xgene_pmu_dev_ctx *ctx)
1127{
1128 struct device *dev = xgene_pmu->dev;
1129 struct xgene_pmu_dev *pmu;
1130
1131 pmu = devm_kzalloc(dev, sizeof(*pmu), GFP_KERNEL);
1132 if (!pmu)
1133 return -ENOMEM;
1134 pmu->parent = xgene_pmu;
1135 pmu->inf = &ctx->inf;
1136 ctx->pmu_dev = pmu;
1137
1138 switch (pmu->inf->type) {
1139 case PMU_TYPE_L3C:
1140 if (!(xgene_pmu->l3c_active_mask & pmu->inf->enable_mask))
1141 return -ENODEV;
1142 if (xgene_pmu->version == PCP_PMU_V3)
1143 pmu->attr_groups = l3c_pmu_v3_attr_groups;
1144 else
1145 pmu->attr_groups = l3c_pmu_attr_groups;
1146 break;
1147 case PMU_TYPE_IOB:
1148 if (xgene_pmu->version == PCP_PMU_V3)
1149 pmu->attr_groups = iob_fast_pmu_v3_attr_groups;
1150 else
1151 pmu->attr_groups = iob_pmu_attr_groups;
1152 break;
1153 case PMU_TYPE_IOB_SLOW:
1154 if (xgene_pmu->version == PCP_PMU_V3)
1155 pmu->attr_groups = iob_slow_pmu_v3_attr_groups;
1156 break;
1157 case PMU_TYPE_MCB:
1158 if (!(xgene_pmu->mcb_active_mask & pmu->inf->enable_mask))
1159 return -ENODEV;
1160 if (xgene_pmu->version == PCP_PMU_V3)
1161 pmu->attr_groups = mcb_pmu_v3_attr_groups;
1162 else
1163 pmu->attr_groups = mcb_pmu_attr_groups;
1164 break;
1165 case PMU_TYPE_MC:
1166 if (!(xgene_pmu->mc_active_mask & pmu->inf->enable_mask))
1167 return -ENODEV;
1168 if (xgene_pmu->version == PCP_PMU_V3)
1169 pmu->attr_groups = mc_pmu_v3_attr_groups;
1170 else
1171 pmu->attr_groups = mc_pmu_attr_groups;
1172 break;
1173 default:
1174 return -EINVAL;
1175 }
1176
1177 if (xgene_init_perf(pmu, ctx->name)) {
1178 dev_err(dev, "%s PMU: Failed to init perf driver\n", ctx->name);
1179 return -ENODEV;
1180 }
1181
1182 dev_info(dev, "%s PMU registered\n", ctx->name);
1183
1184 return 0;
1185}
1186
1187static void _xgene_pmu_isr(int irq, struct xgene_pmu_dev *pmu_dev)
1188{
1189 struct xgene_pmu *xgene_pmu = pmu_dev->parent;
1190 void __iomem *csr = pmu_dev->inf->csr;
1191 u32 pmovsr;
1192 int idx;
1193
1194 xgene_pmu->ops->stop_counters(pmu_dev);
1195
1196 if (xgene_pmu->version == PCP_PMU_V3)
1197 pmovsr = readl(csr + PMU_PMOVSSET) & PMU_OVERFLOW_MASK;
1198 else
1199 pmovsr = readl(csr + PMU_PMOVSR) & PMU_OVERFLOW_MASK;
1200
1201 if (!pmovsr)
1202 goto out;
1203
1204 /* Clear interrupt flag */
1205 if (xgene_pmu->version == PCP_PMU_V1)
1206 writel(0x0, csr + PMU_PMOVSR);
1207 else if (xgene_pmu->version == PCP_PMU_V2)
1208 writel(pmovsr, csr + PMU_PMOVSR);
1209 else
1210 writel(pmovsr, csr + PMU_PMOVSCLR);
1211
1212 for (idx = 0; idx < PMU_MAX_COUNTERS; idx++) {
1213 struct perf_event *event = pmu_dev->pmu_counter_event[idx];
1214 int overflowed = pmovsr & BIT(idx);
1215
1216 /* Ignore if we don't have an event. */
1217 if (!event || !overflowed)
1218 continue;
1219 xgene_perf_event_update(event);
1220 xgene_perf_event_set_period(event);
1221 }
1222
1223out:
1224 xgene_pmu->ops->start_counters(pmu_dev);
1225}
1226
1227static irqreturn_t xgene_pmu_isr(int irq, void *dev_id)
1228{
1229 u32 intr_mcu, intr_mcb, intr_l3c, intr_iob;
1230 struct xgene_pmu_dev_ctx *ctx;
1231 struct xgene_pmu *xgene_pmu = dev_id;
1232 u32 val;
1233
1234 raw_spin_lock(&xgene_pmu->lock);
1235
1236 /* Get Interrupt PMU source */
1237 val = readl(xgene_pmu->pcppmu_csr + PCPPMU_INTSTATUS_REG);
1238 if (xgene_pmu->version == PCP_PMU_V3) {
1239 intr_mcu = PCPPMU_V3_INT_MCU;
1240 intr_mcb = PCPPMU_V3_INT_MCB;
1241 intr_l3c = PCPPMU_V3_INT_L3C;
1242 intr_iob = PCPPMU_V3_INT_IOB;
1243 } else {
1244 intr_mcu = PCPPMU_INT_MCU;
1245 intr_mcb = PCPPMU_INT_MCB;
1246 intr_l3c = PCPPMU_INT_L3C;
1247 intr_iob = PCPPMU_INT_IOB;
1248 }
1249 if (val & intr_mcu) {
1250 list_for_each_entry(ctx, &xgene_pmu->mcpmus, next) {
1251 _xgene_pmu_isr(irq, ctx->pmu_dev);
1252 }
1253 }
1254 if (val & intr_mcb) {
1255 list_for_each_entry(ctx, &xgene_pmu->mcbpmus, next) {
1256 _xgene_pmu_isr(irq, ctx->pmu_dev);
1257 }
1258 }
1259 if (val & intr_l3c) {
1260 list_for_each_entry(ctx, &xgene_pmu->l3cpmus, next) {
1261 _xgene_pmu_isr(irq, ctx->pmu_dev);
1262 }
1263 }
1264 if (val & intr_iob) {
1265 list_for_each_entry(ctx, &xgene_pmu->iobpmus, next) {
1266 _xgene_pmu_isr(irq, ctx->pmu_dev);
1267 }
1268 }
1269
1270 raw_spin_unlock(&xgene_pmu->lock);
1271
1272 return IRQ_HANDLED;
1273}
1274
1275static int acpi_pmu_probe_active_mcb_mcu_l3c(struct xgene_pmu *xgene_pmu,
1276 struct platform_device *pdev)
1277{
1278 void __iomem *csw_csr, *mcba_csr, *mcbb_csr;
1279 unsigned int reg;
1280
1281 csw_csr = devm_platform_ioremap_resource(pdev, 1);
1282 if (IS_ERR(csw_csr)) {
1283 dev_err(&pdev->dev, "ioremap failed for CSW CSR resource\n");
1284 return PTR_ERR(csw_csr);
1285 }
1286
1287 mcba_csr = devm_platform_ioremap_resource(pdev, 2);
1288 if (IS_ERR(mcba_csr)) {
1289 dev_err(&pdev->dev, "ioremap failed for MCBA CSR resource\n");
1290 return PTR_ERR(mcba_csr);
1291 }
1292
1293 mcbb_csr = devm_platform_ioremap_resource(pdev, 3);
1294 if (IS_ERR(mcbb_csr)) {
1295 dev_err(&pdev->dev, "ioremap failed for MCBB CSR resource\n");
1296 return PTR_ERR(mcbb_csr);
1297 }
1298
1299 xgene_pmu->l3c_active_mask = 0x1;
1300
1301 reg = readl(csw_csr + CSW_CSWCR);
1302 if (reg & CSW_CSWCR_DUALMCB_MASK) {
1303 /* Dual MCB active */
1304 xgene_pmu->mcb_active_mask = 0x3;
1305 /* Probe all active MC(s) */
1306 reg = readl(mcbb_csr + CSW_CSWCR);
1307 xgene_pmu->mc_active_mask =
1308 (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0xF : 0x5;
1309 } else {
1310 /* Single MCB active */
1311 xgene_pmu->mcb_active_mask = 0x1;
1312 /* Probe all active MC(s) */
1313 reg = readl(mcba_csr + CSW_CSWCR);
1314 xgene_pmu->mc_active_mask =
1315 (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0x3 : 0x1;
1316 }
1317
1318 return 0;
1319}
1320
1321static int acpi_pmu_v3_probe_active_mcb_mcu_l3c(struct xgene_pmu *xgene_pmu,
1322 struct platform_device *pdev)
1323{
1324 void __iomem *csw_csr;
1325 unsigned int reg;
1326 u32 mcb0routing;
1327 u32 mcb1routing;
1328
1329 csw_csr = devm_platform_ioremap_resource(pdev, 1);
1330 if (IS_ERR(csw_csr)) {
1331 dev_err(&pdev->dev, "ioremap failed for CSW CSR resource\n");
1332 return PTR_ERR(csw_csr);
1333 }
1334
1335 reg = readl(csw_csr + CSW_CSWCR);
1336 mcb0routing = CSW_CSWCR_MCB0_ROUTING(reg);
1337 mcb1routing = CSW_CSWCR_MCB1_ROUTING(reg);
1338 if (reg & CSW_CSWCR_DUALMCB_MASK) {
1339 /* Dual MCB active */
1340 xgene_pmu->mcb_active_mask = 0x3;
1341 /* Probe all active L3C(s), maximum is 8 */
1342 xgene_pmu->l3c_active_mask = 0xFF;
1343 /* Probe all active MC(s), maximum is 8 */
1344 if ((mcb0routing == 0x2) && (mcb1routing == 0x2))
1345 xgene_pmu->mc_active_mask = 0xFF;
1346 else if ((mcb0routing == 0x1) && (mcb1routing == 0x1))
1347 xgene_pmu->mc_active_mask = 0x33;
1348 else
1349 xgene_pmu->mc_active_mask = 0x11;
1350 } else {
1351 /* Single MCB active */
1352 xgene_pmu->mcb_active_mask = 0x1;
1353 /* Probe all active L3C(s), maximum is 4 */
1354 xgene_pmu->l3c_active_mask = 0x0F;
1355 /* Probe all active MC(s), maximum is 4 */
1356 if (mcb0routing == 0x2)
1357 xgene_pmu->mc_active_mask = 0x0F;
1358 else if (mcb0routing == 0x1)
1359 xgene_pmu->mc_active_mask = 0x03;
1360 else
1361 xgene_pmu->mc_active_mask = 0x01;
1362 }
1363
1364 return 0;
1365}
1366
1367static int fdt_pmu_probe_active_mcb_mcu_l3c(struct xgene_pmu *xgene_pmu,
1368 struct platform_device *pdev)
1369{
1370 struct regmap *csw_map, *mcba_map, *mcbb_map;
1371 struct device_node *np = pdev->dev.of_node;
1372 unsigned int reg;
1373
1374 csw_map = syscon_regmap_lookup_by_phandle(np, "regmap-csw");
1375 if (IS_ERR(csw_map)) {
1376 dev_err(&pdev->dev, "unable to get syscon regmap csw\n");
1377 return PTR_ERR(csw_map);
1378 }
1379
1380 mcba_map = syscon_regmap_lookup_by_phandle(np, "regmap-mcba");
1381 if (IS_ERR(mcba_map)) {
1382 dev_err(&pdev->dev, "unable to get syscon regmap mcba\n");
1383 return PTR_ERR(mcba_map);
1384 }
1385
1386 mcbb_map = syscon_regmap_lookup_by_phandle(np, "regmap-mcbb");
1387 if (IS_ERR(mcbb_map)) {
1388 dev_err(&pdev->dev, "unable to get syscon regmap mcbb\n");
1389 return PTR_ERR(mcbb_map);
1390 }
1391
1392 xgene_pmu->l3c_active_mask = 0x1;
1393 if (regmap_read(csw_map, CSW_CSWCR, ®))
1394 return -EINVAL;
1395
1396 if (reg & CSW_CSWCR_DUALMCB_MASK) {
1397 /* Dual MCB active */
1398 xgene_pmu->mcb_active_mask = 0x3;
1399 /* Probe all active MC(s) */
1400 if (regmap_read(mcbb_map, MCBADDRMR, ®))
1401 return 0;
1402 xgene_pmu->mc_active_mask =
1403 (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0xF : 0x5;
1404 } else {
1405 /* Single MCB active */
1406 xgene_pmu->mcb_active_mask = 0x1;
1407 /* Probe all active MC(s) */
1408 if (regmap_read(mcba_map, MCBADDRMR, ®))
1409 return 0;
1410 xgene_pmu->mc_active_mask =
1411 (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0x3 : 0x1;
1412 }
1413
1414 return 0;
1415}
1416
1417static int xgene_pmu_probe_active_mcb_mcu_l3c(struct xgene_pmu *xgene_pmu,
1418 struct platform_device *pdev)
1419{
1420 if (has_acpi_companion(&pdev->dev)) {
1421 if (xgene_pmu->version == PCP_PMU_V3)
1422 return acpi_pmu_v3_probe_active_mcb_mcu_l3c(xgene_pmu,
1423 pdev);
1424 else
1425 return acpi_pmu_probe_active_mcb_mcu_l3c(xgene_pmu,
1426 pdev);
1427 }
1428 return fdt_pmu_probe_active_mcb_mcu_l3c(xgene_pmu, pdev);
1429}
1430
1431static char *xgene_pmu_dev_name(struct device *dev, u32 type, int id)
1432{
1433 switch (type) {
1434 case PMU_TYPE_L3C:
1435 return devm_kasprintf(dev, GFP_KERNEL, "l3c%d", id);
1436 case PMU_TYPE_IOB:
1437 return devm_kasprintf(dev, GFP_KERNEL, "iob%d", id);
1438 case PMU_TYPE_IOB_SLOW:
1439 return devm_kasprintf(dev, GFP_KERNEL, "iob_slow%d", id);
1440 case PMU_TYPE_MCB:
1441 return devm_kasprintf(dev, GFP_KERNEL, "mcb%d", id);
1442 case PMU_TYPE_MC:
1443 return devm_kasprintf(dev, GFP_KERNEL, "mc%d", id);
1444 default:
1445 return devm_kasprintf(dev, GFP_KERNEL, "unknown");
1446 }
1447}
1448
1449#if defined(CONFIG_ACPI)
1450static struct
1451xgene_pmu_dev_ctx *acpi_get_pmu_hw_inf(struct xgene_pmu *xgene_pmu,
1452 struct acpi_device *adev, u32 type)
1453{
1454 struct device *dev = xgene_pmu->dev;
1455 struct list_head resource_list;
1456 struct xgene_pmu_dev_ctx *ctx;
1457 const union acpi_object *obj;
1458 struct hw_pmu_info *inf;
1459 void __iomem *dev_csr;
1460 struct resource res;
1461 struct resource_entry *rentry;
1462 int enable_bit;
1463 int rc;
1464
1465 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
1466 if (!ctx)
1467 return NULL;
1468
1469 INIT_LIST_HEAD(&resource_list);
1470 rc = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
1471 if (rc <= 0) {
1472 dev_err(dev, "PMU type %d: No resources found\n", type);
1473 return NULL;
1474 }
1475
1476 list_for_each_entry(rentry, &resource_list, node) {
1477 if (resource_type(rentry->res) == IORESOURCE_MEM) {
1478 res = *rentry->res;
1479 rentry = NULL;
1480 break;
1481 }
1482 }
1483 acpi_dev_free_resource_list(&resource_list);
1484
1485 if (rentry) {
1486 dev_err(dev, "PMU type %d: No memory resource found\n", type);
1487 return NULL;
1488 }
1489
1490 dev_csr = devm_ioremap_resource(dev, &res);
1491 if (IS_ERR(dev_csr)) {
1492 dev_err(dev, "PMU type %d: Fail to map resource\n", type);
1493 return NULL;
1494 }
1495
1496 /* A PMU device node without enable-bit-index is always enabled */
1497 rc = acpi_dev_get_property(adev, "enable-bit-index",
1498 ACPI_TYPE_INTEGER, &obj);
1499 if (rc < 0)
1500 enable_bit = 0;
1501 else
1502 enable_bit = (int) obj->integer.value;
1503
1504 ctx->name = xgene_pmu_dev_name(dev, type, enable_bit);
1505 if (!ctx->name) {
1506 dev_err(dev, "PMU type %d: Fail to get device name\n", type);
1507 return NULL;
1508 }
1509 inf = &ctx->inf;
1510 inf->type = type;
1511 inf->csr = dev_csr;
1512 inf->enable_mask = 1 << enable_bit;
1513
1514 return ctx;
1515}
1516
1517static const struct acpi_device_id xgene_pmu_acpi_type_match[] = {
1518 {"APMC0D5D", PMU_TYPE_L3C},
1519 {"APMC0D5E", PMU_TYPE_IOB},
1520 {"APMC0D5F", PMU_TYPE_MCB},
1521 {"APMC0D60", PMU_TYPE_MC},
1522 {"APMC0D84", PMU_TYPE_L3C},
1523 {"APMC0D85", PMU_TYPE_IOB},
1524 {"APMC0D86", PMU_TYPE_IOB_SLOW},
1525 {"APMC0D87", PMU_TYPE_MCB},
1526 {"APMC0D88", PMU_TYPE_MC},
1527 {},
1528};
1529
1530static const struct acpi_device_id *xgene_pmu_acpi_match_type(
1531 const struct acpi_device_id *ids,
1532 struct acpi_device *adev)
1533{
1534 const struct acpi_device_id *match_id = NULL;
1535 const struct acpi_device_id *id;
1536
1537 for (id = ids; id->id[0] || id->cls; id++) {
1538 if (!acpi_match_device_ids(adev, id))
1539 match_id = id;
1540 else if (match_id)
1541 break;
1542 }
1543
1544 return match_id;
1545}
1546
1547static acpi_status acpi_pmu_dev_add(acpi_handle handle, u32 level,
1548 void *data, void **return_value)
1549{
1550 struct acpi_device *adev = acpi_fetch_acpi_dev(handle);
1551 const struct acpi_device_id *acpi_id;
1552 struct xgene_pmu *xgene_pmu = data;
1553 struct xgene_pmu_dev_ctx *ctx;
1554
1555 if (!adev || acpi_bus_get_status(adev) || !adev->status.present)
1556 return AE_OK;
1557
1558 acpi_id = xgene_pmu_acpi_match_type(xgene_pmu_acpi_type_match, adev);
1559 if (!acpi_id)
1560 return AE_OK;
1561
1562 ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, (u32)acpi_id->driver_data);
1563 if (!ctx)
1564 return AE_OK;
1565
1566 if (xgene_pmu_dev_add(xgene_pmu, ctx)) {
1567 /* Can't add the PMU device, skip it */
1568 devm_kfree(xgene_pmu->dev, ctx);
1569 return AE_OK;
1570 }
1571
1572 switch (ctx->inf.type) {
1573 case PMU_TYPE_L3C:
1574 list_add(&ctx->next, &xgene_pmu->l3cpmus);
1575 break;
1576 case PMU_TYPE_IOB:
1577 list_add(&ctx->next, &xgene_pmu->iobpmus);
1578 break;
1579 case PMU_TYPE_IOB_SLOW:
1580 list_add(&ctx->next, &xgene_pmu->iobpmus);
1581 break;
1582 case PMU_TYPE_MCB:
1583 list_add(&ctx->next, &xgene_pmu->mcbpmus);
1584 break;
1585 case PMU_TYPE_MC:
1586 list_add(&ctx->next, &xgene_pmu->mcpmus);
1587 break;
1588 }
1589 return AE_OK;
1590}
1591
1592static int acpi_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
1593 struct platform_device *pdev)
1594{
1595 struct device *dev = xgene_pmu->dev;
1596 acpi_handle handle;
1597 acpi_status status;
1598
1599 handle = ACPI_HANDLE(dev);
1600 if (!handle)
1601 return -EINVAL;
1602
1603 status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
1604 acpi_pmu_dev_add, NULL, xgene_pmu, NULL);
1605 if (ACPI_FAILURE(status)) {
1606 dev_err(dev, "failed to probe PMU devices\n");
1607 return -ENODEV;
1608 }
1609
1610 return 0;
1611}
1612#else
1613static int acpi_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
1614 struct platform_device *pdev)
1615{
1616 return 0;
1617}
1618#endif
1619
1620static struct
1621xgene_pmu_dev_ctx *fdt_get_pmu_hw_inf(struct xgene_pmu *xgene_pmu,
1622 struct device_node *np, u32 type)
1623{
1624 struct device *dev = xgene_pmu->dev;
1625 struct xgene_pmu_dev_ctx *ctx;
1626 struct hw_pmu_info *inf;
1627 void __iomem *dev_csr;
1628 struct resource res;
1629 int enable_bit;
1630
1631 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
1632 if (!ctx)
1633 return NULL;
1634
1635 if (of_address_to_resource(np, 0, &res) < 0) {
1636 dev_err(dev, "PMU type %d: No resource address found\n", type);
1637 return NULL;
1638 }
1639
1640 dev_csr = devm_ioremap_resource(dev, &res);
1641 if (IS_ERR(dev_csr)) {
1642 dev_err(dev, "PMU type %d: Fail to map resource\n", type);
1643 return NULL;
1644 }
1645
1646 /* A PMU device node without enable-bit-index is always enabled */
1647 if (of_property_read_u32(np, "enable-bit-index", &enable_bit))
1648 enable_bit = 0;
1649
1650 ctx->name = xgene_pmu_dev_name(dev, type, enable_bit);
1651 if (!ctx->name) {
1652 dev_err(dev, "PMU type %d: Fail to get device name\n", type);
1653 return NULL;
1654 }
1655
1656 inf = &ctx->inf;
1657 inf->type = type;
1658 inf->csr = dev_csr;
1659 inf->enable_mask = 1 << enable_bit;
1660
1661 return ctx;
1662}
1663
1664static int fdt_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
1665 struct platform_device *pdev)
1666{
1667 struct xgene_pmu_dev_ctx *ctx;
1668 struct device_node *np;
1669
1670 for_each_child_of_node(pdev->dev.of_node, np) {
1671 if (!of_device_is_available(np))
1672 continue;
1673
1674 if (of_device_is_compatible(np, "apm,xgene-pmu-l3c"))
1675 ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_L3C);
1676 else if (of_device_is_compatible(np, "apm,xgene-pmu-iob"))
1677 ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_IOB);
1678 else if (of_device_is_compatible(np, "apm,xgene-pmu-mcb"))
1679 ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_MCB);
1680 else if (of_device_is_compatible(np, "apm,xgene-pmu-mc"))
1681 ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_MC);
1682 else
1683 ctx = NULL;
1684
1685 if (!ctx)
1686 continue;
1687
1688 if (xgene_pmu_dev_add(xgene_pmu, ctx)) {
1689 /* Can't add the PMU device, skip it */
1690 devm_kfree(xgene_pmu->dev, ctx);
1691 continue;
1692 }
1693
1694 switch (ctx->inf.type) {
1695 case PMU_TYPE_L3C:
1696 list_add(&ctx->next, &xgene_pmu->l3cpmus);
1697 break;
1698 case PMU_TYPE_IOB:
1699 list_add(&ctx->next, &xgene_pmu->iobpmus);
1700 break;
1701 case PMU_TYPE_IOB_SLOW:
1702 list_add(&ctx->next, &xgene_pmu->iobpmus);
1703 break;
1704 case PMU_TYPE_MCB:
1705 list_add(&ctx->next, &xgene_pmu->mcbpmus);
1706 break;
1707 case PMU_TYPE_MC:
1708 list_add(&ctx->next, &xgene_pmu->mcpmus);
1709 break;
1710 }
1711 }
1712
1713 return 0;
1714}
1715
1716static int xgene_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
1717 struct platform_device *pdev)
1718{
1719 if (has_acpi_companion(&pdev->dev))
1720 return acpi_pmu_probe_pmu_dev(xgene_pmu, pdev);
1721 return fdt_pmu_probe_pmu_dev(xgene_pmu, pdev);
1722}
1723
1724static const struct xgene_pmu_data xgene_pmu_data = {
1725 .id = PCP_PMU_V1,
1726};
1727
1728static const struct xgene_pmu_data xgene_pmu_v2_data = {
1729 .id = PCP_PMU_V2,
1730};
1731
1732#ifdef CONFIG_ACPI
1733static const struct xgene_pmu_data xgene_pmu_v3_data = {
1734 .id = PCP_PMU_V3,
1735};
1736#endif
1737
1738static const struct xgene_pmu_ops xgene_pmu_ops = {
1739 .mask_int = xgene_pmu_mask_int,
1740 .unmask_int = xgene_pmu_unmask_int,
1741 .read_counter = xgene_pmu_read_counter32,
1742 .write_counter = xgene_pmu_write_counter32,
1743 .write_evttype = xgene_pmu_write_evttype,
1744 .write_agentmsk = xgene_pmu_write_agentmsk,
1745 .write_agent1msk = xgene_pmu_write_agent1msk,
1746 .enable_counter = xgene_pmu_enable_counter,
1747 .disable_counter = xgene_pmu_disable_counter,
1748 .enable_counter_int = xgene_pmu_enable_counter_int,
1749 .disable_counter_int = xgene_pmu_disable_counter_int,
1750 .reset_counters = xgene_pmu_reset_counters,
1751 .start_counters = xgene_pmu_start_counters,
1752 .stop_counters = xgene_pmu_stop_counters,
1753};
1754
1755static const struct xgene_pmu_ops xgene_pmu_v3_ops = {
1756 .mask_int = xgene_pmu_v3_mask_int,
1757 .unmask_int = xgene_pmu_v3_unmask_int,
1758 .read_counter = xgene_pmu_read_counter64,
1759 .write_counter = xgene_pmu_write_counter64,
1760 .write_evttype = xgene_pmu_write_evttype,
1761 .write_agentmsk = xgene_pmu_v3_write_agentmsk,
1762 .write_agent1msk = xgene_pmu_v3_write_agent1msk,
1763 .enable_counter = xgene_pmu_enable_counter,
1764 .disable_counter = xgene_pmu_disable_counter,
1765 .enable_counter_int = xgene_pmu_enable_counter_int,
1766 .disable_counter_int = xgene_pmu_disable_counter_int,
1767 .reset_counters = xgene_pmu_reset_counters,
1768 .start_counters = xgene_pmu_start_counters,
1769 .stop_counters = xgene_pmu_stop_counters,
1770};
1771
1772static const struct of_device_id xgene_pmu_of_match[] = {
1773 { .compatible = "apm,xgene-pmu", .data = &xgene_pmu_data },
1774 { .compatible = "apm,xgene-pmu-v2", .data = &xgene_pmu_v2_data },
1775 {},
1776};
1777MODULE_DEVICE_TABLE(of, xgene_pmu_of_match);
1778#ifdef CONFIG_ACPI
1779static const struct acpi_device_id xgene_pmu_acpi_match[] = {
1780 {"APMC0D5B", (kernel_ulong_t)&xgene_pmu_data},
1781 {"APMC0D5C", (kernel_ulong_t)&xgene_pmu_v2_data},
1782 {"APMC0D83", (kernel_ulong_t)&xgene_pmu_v3_data},
1783 {},
1784};
1785MODULE_DEVICE_TABLE(acpi, xgene_pmu_acpi_match);
1786#endif
1787
1788static int xgene_pmu_online_cpu(unsigned int cpu, struct hlist_node *node)
1789{
1790 struct xgene_pmu *xgene_pmu = hlist_entry_safe(node, struct xgene_pmu,
1791 node);
1792
1793 if (cpumask_empty(&xgene_pmu->cpu))
1794 cpumask_set_cpu(cpu, &xgene_pmu->cpu);
1795
1796 /* Overflow interrupt also should use the same CPU */
1797 WARN_ON(irq_set_affinity(xgene_pmu->irq, &xgene_pmu->cpu));
1798
1799 return 0;
1800}
1801
1802static int xgene_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
1803{
1804 struct xgene_pmu *xgene_pmu = hlist_entry_safe(node, struct xgene_pmu,
1805 node);
1806 struct xgene_pmu_dev_ctx *ctx;
1807 unsigned int target;
1808
1809 if (!cpumask_test_and_clear_cpu(cpu, &xgene_pmu->cpu))
1810 return 0;
1811 target = cpumask_any_but(cpu_online_mask, cpu);
1812 if (target >= nr_cpu_ids)
1813 return 0;
1814
1815 list_for_each_entry(ctx, &xgene_pmu->mcpmus, next) {
1816 perf_pmu_migrate_context(&ctx->pmu_dev->pmu, cpu, target);
1817 }
1818 list_for_each_entry(ctx, &xgene_pmu->mcbpmus, next) {
1819 perf_pmu_migrate_context(&ctx->pmu_dev->pmu, cpu, target);
1820 }
1821 list_for_each_entry(ctx, &xgene_pmu->l3cpmus, next) {
1822 perf_pmu_migrate_context(&ctx->pmu_dev->pmu, cpu, target);
1823 }
1824 list_for_each_entry(ctx, &xgene_pmu->iobpmus, next) {
1825 perf_pmu_migrate_context(&ctx->pmu_dev->pmu, cpu, target);
1826 }
1827
1828 cpumask_set_cpu(target, &xgene_pmu->cpu);
1829 /* Overflow interrupt also should use the same CPU */
1830 WARN_ON(irq_set_affinity(xgene_pmu->irq, &xgene_pmu->cpu));
1831
1832 return 0;
1833}
1834
1835static int xgene_pmu_probe(struct platform_device *pdev)
1836{
1837 const struct xgene_pmu_data *dev_data;
1838 struct xgene_pmu *xgene_pmu;
1839 int irq, rc;
1840 int version;
1841
1842 /* Install a hook to update the reader CPU in case it goes offline */
1843 rc = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE,
1844 "CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE",
1845 xgene_pmu_online_cpu,
1846 xgene_pmu_offline_cpu);
1847 if (rc)
1848 return rc;
1849
1850 xgene_pmu = devm_kzalloc(&pdev->dev, sizeof(*xgene_pmu), GFP_KERNEL);
1851 if (!xgene_pmu)
1852 return -ENOMEM;
1853 xgene_pmu->dev = &pdev->dev;
1854 platform_set_drvdata(pdev, xgene_pmu);
1855
1856 dev_data = device_get_match_data(&pdev->dev);
1857 if (!dev_data)
1858 return -ENODEV;
1859 version = dev_data->id;
1860
1861 if (version == PCP_PMU_V3)
1862 xgene_pmu->ops = &xgene_pmu_v3_ops;
1863 else
1864 xgene_pmu->ops = &xgene_pmu_ops;
1865
1866 INIT_LIST_HEAD(&xgene_pmu->l3cpmus);
1867 INIT_LIST_HEAD(&xgene_pmu->iobpmus);
1868 INIT_LIST_HEAD(&xgene_pmu->mcbpmus);
1869 INIT_LIST_HEAD(&xgene_pmu->mcpmus);
1870
1871 xgene_pmu->version = version;
1872 dev_info(&pdev->dev, "X-Gene PMU version %d\n", xgene_pmu->version);
1873
1874 xgene_pmu->pcppmu_csr = devm_platform_ioremap_resource(pdev, 0);
1875 if (IS_ERR(xgene_pmu->pcppmu_csr)) {
1876 dev_err(&pdev->dev, "ioremap failed for PCP PMU resource\n");
1877 return PTR_ERR(xgene_pmu->pcppmu_csr);
1878 }
1879
1880 irq = platform_get_irq(pdev, 0);
1881 if (irq < 0)
1882 return -EINVAL;
1883
1884 rc = devm_request_irq(&pdev->dev, irq, xgene_pmu_isr,
1885 IRQF_NOBALANCING | IRQF_NO_THREAD,
1886 dev_name(&pdev->dev), xgene_pmu);
1887 if (rc) {
1888 dev_err(&pdev->dev, "Could not request IRQ %d\n", irq);
1889 return rc;
1890 }
1891
1892 xgene_pmu->irq = irq;
1893
1894 raw_spin_lock_init(&xgene_pmu->lock);
1895
1896 /* Check for active MCBs and MCUs */
1897 rc = xgene_pmu_probe_active_mcb_mcu_l3c(xgene_pmu, pdev);
1898 if (rc) {
1899 dev_warn(&pdev->dev, "Unknown MCB/MCU active status\n");
1900 xgene_pmu->mcb_active_mask = 0x1;
1901 xgene_pmu->mc_active_mask = 0x1;
1902 }
1903
1904 /* Add this instance to the list used by the hotplug callback */
1905 rc = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE,
1906 &xgene_pmu->node);
1907 if (rc) {
1908 dev_err(&pdev->dev, "Error %d registering hotplug", rc);
1909 return rc;
1910 }
1911
1912 /* Walk through the tree for all PMU perf devices */
1913 rc = xgene_pmu_probe_pmu_dev(xgene_pmu, pdev);
1914 if (rc) {
1915 dev_err(&pdev->dev, "No PMU perf devices found!\n");
1916 goto out_unregister;
1917 }
1918
1919 /* Enable interrupt */
1920 xgene_pmu->ops->unmask_int(xgene_pmu);
1921
1922 return 0;
1923
1924out_unregister:
1925 cpuhp_state_remove_instance(CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE,
1926 &xgene_pmu->node);
1927 return rc;
1928}
1929
1930static void
1931xgene_pmu_dev_cleanup(struct xgene_pmu *xgene_pmu, struct list_head *pmus)
1932{
1933 struct xgene_pmu_dev_ctx *ctx;
1934
1935 list_for_each_entry(ctx, pmus, next) {
1936 perf_pmu_unregister(&ctx->pmu_dev->pmu);
1937 }
1938}
1939
1940static int xgene_pmu_remove(struct platform_device *pdev)
1941{
1942 struct xgene_pmu *xgene_pmu = dev_get_drvdata(&pdev->dev);
1943
1944 xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->l3cpmus);
1945 xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->iobpmus);
1946 xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->mcbpmus);
1947 xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->mcpmus);
1948 cpuhp_state_remove_instance(CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE,
1949 &xgene_pmu->node);
1950
1951 return 0;
1952}
1953
1954static struct platform_driver xgene_pmu_driver = {
1955 .probe = xgene_pmu_probe,
1956 .remove = xgene_pmu_remove,
1957 .driver = {
1958 .name = "xgene-pmu",
1959 .of_match_table = xgene_pmu_of_match,
1960 .acpi_match_table = ACPI_PTR(xgene_pmu_acpi_match),
1961 .suppress_bind_attrs = true,
1962 },
1963};
1964
1965builtin_platform_driver(xgene_pmu_driver);