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authorTai Nguyen <ttnguyen@apm.com>2016-07-15 13:38:04 -0400
committerDuc Dang <dhdang@apm.com>2016-09-15 14:20:55 -0400
commit832c927d119b5be3a01376b8e3033286eb5797e1 (patch)
treea110c4f598690d41b5e00eed9c5fe0309a3b59d7 /drivers/perf
parenteef691c816422603cf5d1306061aae3064056259 (diff)
perf: xgene: Add APM X-Gene SoC Performance Monitoring Unit driver
This patch adds a driver for the SoC-wide (AKA uncore) PMU hardware found in APM X-Gene SoCs. Signed-off-by: Tai Nguyen <ttnguyen@apm.com> Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Diffstat (limited to 'drivers/perf')
-rw-r--r--drivers/perf/Kconfig7
-rw-r--r--drivers/perf/Makefile1
-rw-r--r--drivers/perf/xgene_pmu.c1398
3 files changed, 1406 insertions, 0 deletions
diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig
index 04e2653bb8c0..4d5c5f9f0dbd 100644
--- a/drivers/perf/Kconfig
+++ b/drivers/perf/Kconfig
@@ -12,4 +12,11 @@ config ARM_PMU
12 Say y if you want to use CPU performance monitors on ARM-based 12 Say y if you want to use CPU performance monitors on ARM-based
13 systems. 13 systems.
14 14
15config XGENE_PMU
16 depends on PERF_EVENTS && ARCH_XGENE
17 bool "APM X-Gene SoC PMU"
18 default n
19 help
20 Say y if you want to use APM X-Gene SoC performance monitors.
21
15endmenu 22endmenu
diff --git a/drivers/perf/Makefile b/drivers/perf/Makefile
index acd2397ded94..b116e982810b 100644
--- a/drivers/perf/Makefile
+++ b/drivers/perf/Makefile
@@ -1 +1,2 @@
1obj-$(CONFIG_ARM_PMU) += arm_pmu.o 1obj-$(CONFIG_ARM_PMU) += arm_pmu.o
2obj-$(CONFIG_XGENE_PMU) += xgene_pmu.o
diff --git a/drivers/perf/xgene_pmu.c b/drivers/perf/xgene_pmu.c
new file mode 100644
index 000000000000..c2ac7646b99f
--- /dev/null
+++ b/drivers/perf/xgene_pmu.c
@@ -0,0 +1,1398 @@
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/of_address.h>
29#include <linux/of_fdt.h>
30#include <linux/of_irq.h>
31#include <linux/of_platform.h>
32#include <linux/perf_event.h>
33#include <linux/platform_device.h>
34#include <linux/regmap.h>
35#include <linux/slab.h>
36
37#define CSW_CSWCR 0x0000
38#define CSW_CSWCR_DUALMCB_MASK BIT(0)
39#define MCBADDRMR 0x0000
40#define MCBADDRMR_DUALMCU_MODE_MASK BIT(2)
41
42#define PCPPMU_INTSTATUS_REG 0x000
43#define PCPPMU_INTMASK_REG 0x004
44#define PCPPMU_INTMASK 0x0000000F
45#define PCPPMU_INTENMASK 0xFFFFFFFF
46#define PCPPMU_INTCLRMASK 0xFFFFFFF0
47#define PCPPMU_INT_MCU BIT(0)
48#define PCPPMU_INT_MCB BIT(1)
49#define PCPPMU_INT_L3C BIT(2)
50#define PCPPMU_INT_IOB BIT(3)
51
52#define PMU_MAX_COUNTERS 4
53#define PMU_CNT_MAX_PERIOD 0x100000000ULL
54#define PMU_OVERFLOW_MASK 0xF
55#define PMU_PMCR_E BIT(0)
56#define PMU_PMCR_P BIT(1)
57
58#define PMU_PMEVCNTR0 0x000
59#define PMU_PMEVCNTR1 0x004
60#define PMU_PMEVCNTR2 0x008
61#define PMU_PMEVCNTR3 0x00C
62#define PMU_PMEVTYPER0 0x400
63#define PMU_PMEVTYPER1 0x404
64#define PMU_PMEVTYPER2 0x408
65#define PMU_PMEVTYPER3 0x40C
66#define PMU_PMAMR0 0xA00
67#define PMU_PMAMR1 0xA04
68#define PMU_PMCNTENSET 0xC00
69#define PMU_PMCNTENCLR 0xC20
70#define PMU_PMINTENSET 0xC40
71#define PMU_PMINTENCLR 0xC60
72#define PMU_PMOVSR 0xC80
73#define PMU_PMCR 0xE04
74
75#define to_pmu_dev(p) container_of(p, struct xgene_pmu_dev, pmu)
76#define GET_CNTR(ev) (ev->hw.idx)
77#define GET_EVENTID(ev) (ev->hw.config & 0xFFULL)
78#define GET_AGENTID(ev) (ev->hw.config_base & 0xFFFFFFFFUL)
79#define GET_AGENT1ID(ev) ((ev->hw.config_base >> 32) & 0xFFFFFFFFUL)
80
81struct hw_pmu_info {
82 u32 type;
83 u32 enable_mask;
84 void __iomem *csr;
85};
86
87struct xgene_pmu_dev {
88 struct hw_pmu_info *inf;
89 struct xgene_pmu *parent;
90 struct pmu pmu;
91 u8 max_counters;
92 DECLARE_BITMAP(cntr_assign_mask, PMU_MAX_COUNTERS);
93 u64 max_period;
94 const struct attribute_group **attr_groups;
95 struct perf_event *pmu_counter_event[PMU_MAX_COUNTERS];
96};
97
98struct xgene_pmu {
99 struct device *dev;
100 int version;
101 void __iomem *pcppmu_csr;
102 u32 mcb_active_mask;
103 u32 mc_active_mask;
104 cpumask_t cpu;
105 raw_spinlock_t lock;
106 struct list_head l3cpmus;
107 struct list_head iobpmus;
108 struct list_head mcbpmus;
109 struct list_head mcpmus;
110};
111
112struct xgene_pmu_dev_ctx {
113 char *name;
114 struct list_head next;
115 struct xgene_pmu_dev *pmu_dev;
116 struct hw_pmu_info inf;
117};
118
119struct xgene_pmu_data {
120 int id;
121 u32 data;
122};
123
124enum xgene_pmu_version {
125 PCP_PMU_V1 = 1,
126 PCP_PMU_V2,
127};
128
129enum xgene_pmu_dev_type {
130 PMU_TYPE_L3C = 0,
131 PMU_TYPE_IOB,
132 PMU_TYPE_MCB,
133 PMU_TYPE_MC,
134};
135
136/*
137 * sysfs format attributes
138 */
139static ssize_t xgene_pmu_format_show(struct device *dev,
140 struct device_attribute *attr, char *buf)
141{
142 struct dev_ext_attribute *eattr;
143
144 eattr = container_of(attr, struct dev_ext_attribute, attr);
145 return sprintf(buf, "%s\n", (char *) eattr->var);
146}
147
148#define XGENE_PMU_FORMAT_ATTR(_name, _config) \
149 (&((struct dev_ext_attribute[]) { \
150 { .attr = __ATTR(_name, S_IRUGO, xgene_pmu_format_show, NULL), \
151 .var = (void *) _config, } \
152 })[0].attr.attr)
153
154static struct attribute *l3c_pmu_format_attrs[] = {
155 XGENE_PMU_FORMAT_ATTR(l3c_eventid, "config:0-7"),
156 XGENE_PMU_FORMAT_ATTR(l3c_agentid, "config1:0-9"),
157 NULL,
158};
159
160static struct attribute *iob_pmu_format_attrs[] = {
161 XGENE_PMU_FORMAT_ATTR(iob_eventid, "config:0-7"),
162 XGENE_PMU_FORMAT_ATTR(iob_agentid, "config1:0-63"),
163 NULL,
164};
165
166static struct attribute *mcb_pmu_format_attrs[] = {
167 XGENE_PMU_FORMAT_ATTR(mcb_eventid, "config:0-5"),
168 XGENE_PMU_FORMAT_ATTR(mcb_agentid, "config1:0-9"),
169 NULL,
170};
171
172static struct attribute *mc_pmu_format_attrs[] = {
173 XGENE_PMU_FORMAT_ATTR(mc_eventid, "config:0-28"),
174 NULL,
175};
176
177static const struct attribute_group l3c_pmu_format_attr_group = {
178 .name = "format",
179 .attrs = l3c_pmu_format_attrs,
180};
181
182static const struct attribute_group iob_pmu_format_attr_group = {
183 .name = "format",
184 .attrs = iob_pmu_format_attrs,
185};
186
187static const struct attribute_group mcb_pmu_format_attr_group = {
188 .name = "format",
189 .attrs = mcb_pmu_format_attrs,
190};
191
192static const struct attribute_group mc_pmu_format_attr_group = {
193 .name = "format",
194 .attrs = mc_pmu_format_attrs,
195};
196
197/*
198 * sysfs event attributes
199 */
200static ssize_t xgene_pmu_event_show(struct device *dev,
201 struct device_attribute *attr, char *buf)
202{
203 struct dev_ext_attribute *eattr;
204
205 eattr = container_of(attr, struct dev_ext_attribute, attr);
206 return sprintf(buf, "config=0x%lx\n", (unsigned long) eattr->var);
207}
208
209#define XGENE_PMU_EVENT_ATTR(_name, _config) \
210 (&((struct dev_ext_attribute[]) { \
211 { .attr = __ATTR(_name, S_IRUGO, xgene_pmu_event_show, NULL), \
212 .var = (void *) _config, } \
213 })[0].attr.attr)
214
215static struct attribute *l3c_pmu_events_attrs[] = {
216 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
217 XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01),
218 XGENE_PMU_EVENT_ATTR(read-hit, 0x02),
219 XGENE_PMU_EVENT_ATTR(read-miss, 0x03),
220 XGENE_PMU_EVENT_ATTR(write-need-replacement, 0x06),
221 XGENE_PMU_EVENT_ATTR(write-not-need-replacement, 0x07),
222 XGENE_PMU_EVENT_ATTR(tq-full, 0x08),
223 XGENE_PMU_EVENT_ATTR(ackq-full, 0x09),
224 XGENE_PMU_EVENT_ATTR(wdb-full, 0x0a),
225 XGENE_PMU_EVENT_ATTR(bank-fifo-full, 0x0b),
226 XGENE_PMU_EVENT_ATTR(odb-full, 0x0c),
227 XGENE_PMU_EVENT_ATTR(wbq-full, 0x0d),
228 XGENE_PMU_EVENT_ATTR(bank-conflict-fifo-issue, 0x0e),
229 XGENE_PMU_EVENT_ATTR(bank-fifo-issue, 0x0f),
230 NULL,
231};
232
233static struct attribute *iob_pmu_events_attrs[] = {
234 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
235 XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01),
236 XGENE_PMU_EVENT_ATTR(axi0-read, 0x02),
237 XGENE_PMU_EVENT_ATTR(axi0-read-partial, 0x03),
238 XGENE_PMU_EVENT_ATTR(axi1-read, 0x04),
239 XGENE_PMU_EVENT_ATTR(axi1-read-partial, 0x05),
240 XGENE_PMU_EVENT_ATTR(csw-read-block, 0x06),
241 XGENE_PMU_EVENT_ATTR(csw-read-partial, 0x07),
242 XGENE_PMU_EVENT_ATTR(axi0-write, 0x10),
243 XGENE_PMU_EVENT_ATTR(axi0-write-partial, 0x11),
244 XGENE_PMU_EVENT_ATTR(axi1-write, 0x13),
245 XGENE_PMU_EVENT_ATTR(axi1-write-partial, 0x14),
246 XGENE_PMU_EVENT_ATTR(csw-inbound-dirty, 0x16),
247 NULL,
248};
249
250static struct attribute *mcb_pmu_events_attrs[] = {
251 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
252 XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01),
253 XGENE_PMU_EVENT_ATTR(csw-read, 0x02),
254 XGENE_PMU_EVENT_ATTR(csw-write-request, 0x03),
255 XGENE_PMU_EVENT_ATTR(mcb-csw-stall, 0x04),
256 XGENE_PMU_EVENT_ATTR(cancel-read-gack, 0x05),
257 NULL,
258};
259
260static struct attribute *mc_pmu_events_attrs[] = {
261 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
262 XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01),
263 XGENE_PMU_EVENT_ATTR(act-cmd-sent, 0x02),
264 XGENE_PMU_EVENT_ATTR(pre-cmd-sent, 0x03),
265 XGENE_PMU_EVENT_ATTR(rd-cmd-sent, 0x04),
266 XGENE_PMU_EVENT_ATTR(rda-cmd-sent, 0x05),
267 XGENE_PMU_EVENT_ATTR(wr-cmd-sent, 0x06),
268 XGENE_PMU_EVENT_ATTR(wra-cmd-sent, 0x07),
269 XGENE_PMU_EVENT_ATTR(pde-cmd-sent, 0x08),
270 XGENE_PMU_EVENT_ATTR(sre-cmd-sent, 0x09),
271 XGENE_PMU_EVENT_ATTR(prea-cmd-sent, 0x0a),
272 XGENE_PMU_EVENT_ATTR(ref-cmd-sent, 0x0b),
273 XGENE_PMU_EVENT_ATTR(rd-rda-cmd-sent, 0x0c),
274 XGENE_PMU_EVENT_ATTR(wr-wra-cmd-sent, 0x0d),
275 XGENE_PMU_EVENT_ATTR(in-rd-collision, 0x0e),
276 XGENE_PMU_EVENT_ATTR(in-wr-collision, 0x0f),
277 XGENE_PMU_EVENT_ATTR(collision-queue-not-empty, 0x10),
278 XGENE_PMU_EVENT_ATTR(collision-queue-full, 0x11),
279 XGENE_PMU_EVENT_ATTR(mcu-request, 0x12),
280 XGENE_PMU_EVENT_ATTR(mcu-rd-request, 0x13),
281 XGENE_PMU_EVENT_ATTR(mcu-hp-rd-request, 0x14),
282 XGENE_PMU_EVENT_ATTR(mcu-wr-request, 0x15),
283 XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-all, 0x16),
284 XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-cancel, 0x17),
285 XGENE_PMU_EVENT_ATTR(mcu-rd-response, 0x18),
286 XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-speculative-all, 0x19),
287 XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-speculative-cancel, 0x1a),
288 XGENE_PMU_EVENT_ATTR(mcu-wr-proceed-all, 0x1b),
289 XGENE_PMU_EVENT_ATTR(mcu-wr-proceed-cancel, 0x1c),
290 NULL,
291};
292
293static const struct attribute_group l3c_pmu_events_attr_group = {
294 .name = "events",
295 .attrs = l3c_pmu_events_attrs,
296};
297
298static const struct attribute_group iob_pmu_events_attr_group = {
299 .name = "events",
300 .attrs = iob_pmu_events_attrs,
301};
302
303static const struct attribute_group mcb_pmu_events_attr_group = {
304 .name = "events",
305 .attrs = mcb_pmu_events_attrs,
306};
307
308static const struct attribute_group mc_pmu_events_attr_group = {
309 .name = "events",
310 .attrs = mc_pmu_events_attrs,
311};
312
313/*
314 * sysfs cpumask attributes
315 */
316static ssize_t xgene_pmu_cpumask_show(struct device *dev,
317 struct device_attribute *attr, char *buf)
318{
319 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(dev_get_drvdata(dev));
320
321 return cpumap_print_to_pagebuf(true, buf, &pmu_dev->parent->cpu);
322}
323
324static DEVICE_ATTR(cpumask, S_IRUGO, xgene_pmu_cpumask_show, NULL);
325
326static struct attribute *xgene_pmu_cpumask_attrs[] = {
327 &dev_attr_cpumask.attr,
328 NULL,
329};
330
331static const struct attribute_group pmu_cpumask_attr_group = {
332 .attrs = xgene_pmu_cpumask_attrs,
333};
334
335/*
336 * Per PMU device attribute groups
337 */
338static const struct attribute_group *l3c_pmu_attr_groups[] = {
339 &l3c_pmu_format_attr_group,
340 &pmu_cpumask_attr_group,
341 &l3c_pmu_events_attr_group,
342 NULL
343};
344
345static const struct attribute_group *iob_pmu_attr_groups[] = {
346 &iob_pmu_format_attr_group,
347 &pmu_cpumask_attr_group,
348 &iob_pmu_events_attr_group,
349 NULL
350};
351
352static const struct attribute_group *mcb_pmu_attr_groups[] = {
353 &mcb_pmu_format_attr_group,
354 &pmu_cpumask_attr_group,
355 &mcb_pmu_events_attr_group,
356 NULL
357};
358
359static const struct attribute_group *mc_pmu_attr_groups[] = {
360 &mc_pmu_format_attr_group,
361 &pmu_cpumask_attr_group,
362 &mc_pmu_events_attr_group,
363 NULL
364};
365
366static int get_next_avail_cntr(struct xgene_pmu_dev *pmu_dev)
367{
368 int cntr;
369
370 cntr = find_first_zero_bit(pmu_dev->cntr_assign_mask,
371 pmu_dev->max_counters);
372 if (cntr == pmu_dev->max_counters)
373 return -ENOSPC;
374 set_bit(cntr, pmu_dev->cntr_assign_mask);
375
376 return cntr;
377}
378
379static void clear_avail_cntr(struct xgene_pmu_dev *pmu_dev, int cntr)
380{
381 clear_bit(cntr, pmu_dev->cntr_assign_mask);
382}
383
384static inline void xgene_pmu_mask_int(struct xgene_pmu *xgene_pmu)
385{
386 writel(PCPPMU_INTENMASK, xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG);
387}
388
389static inline void xgene_pmu_unmask_int(struct xgene_pmu *xgene_pmu)
390{
391 writel(PCPPMU_INTCLRMASK, xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG);
392}
393
394static inline u32 xgene_pmu_read_counter(struct xgene_pmu_dev *pmu_dev, int idx)
395{
396 return readl(pmu_dev->inf->csr + PMU_PMEVCNTR0 + (4 * idx));
397}
398
399static inline void
400xgene_pmu_write_counter(struct xgene_pmu_dev *pmu_dev, int idx, u32 val)
401{
402 writel(val, pmu_dev->inf->csr + PMU_PMEVCNTR0 + (4 * idx));
403}
404
405static inline void
406xgene_pmu_write_evttype(struct xgene_pmu_dev *pmu_dev, int idx, u32 val)
407{
408 writel(val, pmu_dev->inf->csr + PMU_PMEVTYPER0 + (4 * idx));
409}
410
411static inline void
412xgene_pmu_write_agentmsk(struct xgene_pmu_dev *pmu_dev, u32 val)
413{
414 writel(val, pmu_dev->inf->csr + PMU_PMAMR0);
415}
416
417static inline void
418xgene_pmu_write_agent1msk(struct xgene_pmu_dev *pmu_dev, u32 val)
419{
420 writel(val, pmu_dev->inf->csr + PMU_PMAMR1);
421}
422
423static inline void
424xgene_pmu_enable_counter(struct xgene_pmu_dev *pmu_dev, int idx)
425{
426 u32 val;
427
428 val = readl(pmu_dev->inf->csr + PMU_PMCNTENSET);
429 val |= 1 << idx;
430 writel(val, pmu_dev->inf->csr + PMU_PMCNTENSET);
431}
432
433static inline void
434xgene_pmu_disable_counter(struct xgene_pmu_dev *pmu_dev, int idx)
435{
436 u32 val;
437
438 val = readl(pmu_dev->inf->csr + PMU_PMCNTENCLR);
439 val |= 1 << idx;
440 writel(val, pmu_dev->inf->csr + PMU_PMCNTENCLR);
441}
442
443static inline void
444xgene_pmu_enable_counter_int(struct xgene_pmu_dev *pmu_dev, int idx)
445{
446 u32 val;
447
448 val = readl(pmu_dev->inf->csr + PMU_PMINTENSET);
449 val |= 1 << idx;
450 writel(val, pmu_dev->inf->csr + PMU_PMINTENSET);
451}
452
453static inline void
454xgene_pmu_disable_counter_int(struct xgene_pmu_dev *pmu_dev, int idx)
455{
456 u32 val;
457
458 val = readl(pmu_dev->inf->csr + PMU_PMINTENCLR);
459 val |= 1 << idx;
460 writel(val, pmu_dev->inf->csr + PMU_PMINTENCLR);
461}
462
463static inline void xgene_pmu_reset_counters(struct xgene_pmu_dev *pmu_dev)
464{
465 u32 val;
466
467 val = readl(pmu_dev->inf->csr + PMU_PMCR);
468 val |= PMU_PMCR_P;
469 writel(val, pmu_dev->inf->csr + PMU_PMCR);
470}
471
472static inline void xgene_pmu_start_counters(struct xgene_pmu_dev *pmu_dev)
473{
474 u32 val;
475
476 val = readl(pmu_dev->inf->csr + PMU_PMCR);
477 val |= PMU_PMCR_E;
478 writel(val, pmu_dev->inf->csr + PMU_PMCR);
479}
480
481static inline void xgene_pmu_stop_counters(struct xgene_pmu_dev *pmu_dev)
482{
483 u32 val;
484
485 val = readl(pmu_dev->inf->csr + PMU_PMCR);
486 val &= ~PMU_PMCR_E;
487 writel(val, pmu_dev->inf->csr + PMU_PMCR);
488}
489
490static void xgene_perf_pmu_enable(struct pmu *pmu)
491{
492 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(pmu);
493 int enabled = bitmap_weight(pmu_dev->cntr_assign_mask,
494 pmu_dev->max_counters);
495
496 if (!enabled)
497 return;
498
499 xgene_pmu_start_counters(pmu_dev);
500}
501
502static void xgene_perf_pmu_disable(struct pmu *pmu)
503{
504 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(pmu);
505
506 xgene_pmu_stop_counters(pmu_dev);
507}
508
509static int xgene_perf_event_init(struct perf_event *event)
510{
511 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
512 struct hw_perf_event *hw = &event->hw;
513 struct perf_event *sibling;
514
515 /* Test the event attr type check for PMU enumeration */
516 if (event->attr.type != event->pmu->type)
517 return -ENOENT;
518
519 /*
520 * SOC PMU counters are shared across all cores.
521 * Therefore, it does not support per-process mode.
522 * Also, it does not support event sampling mode.
523 */
524 if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK)
525 return -EINVAL;
526
527 /* SOC counters do not have usr/os/guest/host bits */
528 if (event->attr.exclude_user || event->attr.exclude_kernel ||
529 event->attr.exclude_host || event->attr.exclude_guest)
530 return -EINVAL;
531
532 if (event->cpu < 0)
533 return -EINVAL;
534 /*
535 * Many perf core operations (eg. events rotation) operate on a
536 * single CPU context. This is obvious for CPU PMUs, where one
537 * expects the same sets of events being observed on all CPUs,
538 * but can lead to issues for off-core PMUs, where each
539 * event could be theoretically assigned to a different CPU. To
540 * mitigate this, we enforce CPU assignment to one, selected
541 * processor (the one described in the "cpumask" attribute).
542 */
543 event->cpu = cpumask_first(&pmu_dev->parent->cpu);
544
545 hw->config = event->attr.config;
546 /*
547 * Each bit of the config1 field represents an agent from which the
548 * request of the event come. The event is counted only if it's caused
549 * by a request of an agent has the bit cleared.
550 * By default, the event is counted for all agents.
551 */
552 hw->config_base = event->attr.config1;
553
554 /*
555 * We must NOT create groups containing mixed PMUs, although software
556 * events are acceptable
557 */
558 if (event->group_leader->pmu != event->pmu &&
559 !is_software_event(event->group_leader))
560 return -EINVAL;
561
562 list_for_each_entry(sibling, &event->group_leader->sibling_list,
563 group_entry)
564 if (sibling->pmu != event->pmu &&
565 !is_software_event(sibling))
566 return -EINVAL;
567
568 return 0;
569}
570
571static void xgene_perf_enable_event(struct perf_event *event)
572{
573 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
574
575 xgene_pmu_write_evttype(pmu_dev, GET_CNTR(event), GET_EVENTID(event));
576 xgene_pmu_write_agentmsk(pmu_dev, ~((u32)GET_AGENTID(event)));
577 if (pmu_dev->inf->type == PMU_TYPE_IOB)
578 xgene_pmu_write_agent1msk(pmu_dev, ~((u32)GET_AGENT1ID(event)));
579
580 xgene_pmu_enable_counter(pmu_dev, GET_CNTR(event));
581 xgene_pmu_enable_counter_int(pmu_dev, GET_CNTR(event));
582}
583
584static void xgene_perf_disable_event(struct perf_event *event)
585{
586 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
587
588 xgene_pmu_disable_counter(pmu_dev, GET_CNTR(event));
589 xgene_pmu_disable_counter_int(pmu_dev, GET_CNTR(event));
590}
591
592static void xgene_perf_event_set_period(struct perf_event *event)
593{
594 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
595 struct hw_perf_event *hw = &event->hw;
596 /*
597 * The X-Gene PMU counters have a period of 2^32. To account for the
598 * possiblity of extreme interrupt latency we program for a period of
599 * half that. Hopefully we can handle the interrupt before another 2^31
600 * events occur and the counter overtakes its previous value.
601 */
602 u64 val = 1ULL << 31;
603
604 local64_set(&hw->prev_count, val);
605 xgene_pmu_write_counter(pmu_dev, hw->idx, (u32) val);
606}
607
608static void xgene_perf_event_update(struct perf_event *event)
609{
610 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
611 struct hw_perf_event *hw = &event->hw;
612 u64 delta, prev_raw_count, new_raw_count;
613
614again:
615 prev_raw_count = local64_read(&hw->prev_count);
616 new_raw_count = xgene_pmu_read_counter(pmu_dev, GET_CNTR(event));
617
618 if (local64_cmpxchg(&hw->prev_count, prev_raw_count,
619 new_raw_count) != prev_raw_count)
620 goto again;
621
622 delta = (new_raw_count - prev_raw_count) & pmu_dev->max_period;
623
624 local64_add(delta, &event->count);
625}
626
627static void xgene_perf_read(struct perf_event *event)
628{
629 xgene_perf_event_update(event);
630}
631
632static void xgene_perf_start(struct perf_event *event, int flags)
633{
634 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
635 struct hw_perf_event *hw = &event->hw;
636
637 if (WARN_ON_ONCE(!(hw->state & PERF_HES_STOPPED)))
638 return;
639
640 WARN_ON_ONCE(!(hw->state & PERF_HES_UPTODATE));
641 hw->state = 0;
642
643 xgene_perf_event_set_period(event);
644
645 if (flags & PERF_EF_RELOAD) {
646 u64 prev_raw_count = local64_read(&hw->prev_count);
647
648 xgene_pmu_write_counter(pmu_dev, GET_CNTR(event),
649 (u32) prev_raw_count);
650 }
651
652 xgene_perf_enable_event(event);
653 perf_event_update_userpage(event);
654}
655
656static void xgene_perf_stop(struct perf_event *event, int flags)
657{
658 struct hw_perf_event *hw = &event->hw;
659 u64 config;
660
661 if (hw->state & PERF_HES_UPTODATE)
662 return;
663
664 xgene_perf_disable_event(event);
665 WARN_ON_ONCE(hw->state & PERF_HES_STOPPED);
666 hw->state |= PERF_HES_STOPPED;
667
668 if (hw->state & PERF_HES_UPTODATE)
669 return;
670
671 config = hw->config;
672 xgene_perf_read(event);
673 hw->state |= PERF_HES_UPTODATE;
674}
675
676static int xgene_perf_add(struct perf_event *event, int flags)
677{
678 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
679 struct hw_perf_event *hw = &event->hw;
680
681 hw->state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
682
683 /* Allocate an event counter */
684 hw->idx = get_next_avail_cntr(pmu_dev);
685 if (hw->idx < 0)
686 return -EAGAIN;
687
688 /* Update counter event pointer for Interrupt handler */
689 pmu_dev->pmu_counter_event[hw->idx] = event;
690
691 if (flags & PERF_EF_START)
692 xgene_perf_start(event, PERF_EF_RELOAD);
693
694 return 0;
695}
696
697static void xgene_perf_del(struct perf_event *event, int flags)
698{
699 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
700 struct hw_perf_event *hw = &event->hw;
701
702 xgene_perf_stop(event, PERF_EF_UPDATE);
703
704 /* clear the assigned counter */
705 clear_avail_cntr(pmu_dev, GET_CNTR(event));
706
707 perf_event_update_userpage(event);
708 pmu_dev->pmu_counter_event[hw->idx] = NULL;
709}
710
711static int xgene_init_perf(struct xgene_pmu_dev *pmu_dev, char *name)
712{
713 struct xgene_pmu *xgene_pmu;
714
715 pmu_dev->max_period = PMU_CNT_MAX_PERIOD - 1;
716 /* First version PMU supports only single event counter */
717 xgene_pmu = pmu_dev->parent;
718 if (xgene_pmu->version == PCP_PMU_V1)
719 pmu_dev->max_counters = 1;
720 else
721 pmu_dev->max_counters = PMU_MAX_COUNTERS;
722
723 /* Perf driver registration */
724 pmu_dev->pmu = (struct pmu) {
725 .attr_groups = pmu_dev->attr_groups,
726 .task_ctx_nr = perf_invalid_context,
727 .pmu_enable = xgene_perf_pmu_enable,
728 .pmu_disable = xgene_perf_pmu_disable,
729 .event_init = xgene_perf_event_init,
730 .add = xgene_perf_add,
731 .del = xgene_perf_del,
732 .start = xgene_perf_start,
733 .stop = xgene_perf_stop,
734 .read = xgene_perf_read,
735 };
736
737 /* Hardware counter init */
738 xgene_pmu_stop_counters(pmu_dev);
739 xgene_pmu_reset_counters(pmu_dev);
740
741 return perf_pmu_register(&pmu_dev->pmu, name, -1);
742}
743
744static int
745xgene_pmu_dev_add(struct xgene_pmu *xgene_pmu, struct xgene_pmu_dev_ctx *ctx)
746{
747 struct device *dev = xgene_pmu->dev;
748 struct xgene_pmu_dev *pmu;
749 int rc;
750
751 pmu = devm_kzalloc(dev, sizeof(*pmu), GFP_KERNEL);
752 if (!pmu)
753 return -ENOMEM;
754 pmu->parent = xgene_pmu;
755 pmu->inf = &ctx->inf;
756 ctx->pmu_dev = pmu;
757
758 switch (pmu->inf->type) {
759 case PMU_TYPE_L3C:
760 pmu->attr_groups = l3c_pmu_attr_groups;
761 break;
762 case PMU_TYPE_IOB:
763 pmu->attr_groups = iob_pmu_attr_groups;
764 break;
765 case PMU_TYPE_MCB:
766 if (!(xgene_pmu->mcb_active_mask & pmu->inf->enable_mask))
767 goto dev_err;
768 pmu->attr_groups = mcb_pmu_attr_groups;
769 break;
770 case PMU_TYPE_MC:
771 if (!(xgene_pmu->mc_active_mask & pmu->inf->enable_mask))
772 goto dev_err;
773 pmu->attr_groups = mc_pmu_attr_groups;
774 break;
775 default:
776 return -EINVAL;
777 }
778
779 rc = xgene_init_perf(pmu, ctx->name);
780 if (rc) {
781 dev_err(dev, "%s PMU: Failed to init perf driver\n", ctx->name);
782 goto dev_err;
783 }
784
785 dev_info(dev, "%s PMU registered\n", ctx->name);
786
787 return rc;
788
789dev_err:
790 devm_kfree(dev, pmu);
791 return -ENODEV;
792}
793
794static void _xgene_pmu_isr(int irq, struct xgene_pmu_dev *pmu_dev)
795{
796 struct xgene_pmu *xgene_pmu = pmu_dev->parent;
797 u32 pmovsr;
798 int idx;
799
800 pmovsr = readl(pmu_dev->inf->csr + PMU_PMOVSR) & PMU_OVERFLOW_MASK;
801 if (!pmovsr)
802 return;
803
804 /* Clear interrupt flag */
805 if (xgene_pmu->version == PCP_PMU_V1)
806 writel(0x0, pmu_dev->inf->csr + PMU_PMOVSR);
807 else
808 writel(pmovsr, pmu_dev->inf->csr + PMU_PMOVSR);
809
810 for (idx = 0; idx < PMU_MAX_COUNTERS; idx++) {
811 struct perf_event *event = pmu_dev->pmu_counter_event[idx];
812 int overflowed = pmovsr & BIT(idx);
813
814 /* Ignore if we don't have an event. */
815 if (!event || !overflowed)
816 continue;
817 xgene_perf_event_update(event);
818 xgene_perf_event_set_period(event);
819 }
820}
821
822static irqreturn_t xgene_pmu_isr(int irq, void *dev_id)
823{
824 struct xgene_pmu_dev_ctx *ctx;
825 struct xgene_pmu *xgene_pmu = dev_id;
826 unsigned long flags;
827 u32 val;
828
829 raw_spin_lock_irqsave(&xgene_pmu->lock, flags);
830
831 /* Get Interrupt PMU source */
832 val = readl(xgene_pmu->pcppmu_csr + PCPPMU_INTSTATUS_REG);
833 if (val & PCPPMU_INT_MCU) {
834 list_for_each_entry(ctx, &xgene_pmu->mcpmus, next) {
835 _xgene_pmu_isr(irq, ctx->pmu_dev);
836 }
837 }
838 if (val & PCPPMU_INT_MCB) {
839 list_for_each_entry(ctx, &xgene_pmu->mcbpmus, next) {
840 _xgene_pmu_isr(irq, ctx->pmu_dev);
841 }
842 }
843 if (val & PCPPMU_INT_L3C) {
844 list_for_each_entry(ctx, &xgene_pmu->l3cpmus, next) {
845 _xgene_pmu_isr(irq, ctx->pmu_dev);
846 }
847 }
848 if (val & PCPPMU_INT_IOB) {
849 list_for_each_entry(ctx, &xgene_pmu->iobpmus, next) {
850 _xgene_pmu_isr(irq, ctx->pmu_dev);
851 }
852 }
853
854 raw_spin_unlock_irqrestore(&xgene_pmu->lock, flags);
855
856 return IRQ_HANDLED;
857}
858
859static int acpi_pmu_probe_active_mcb_mcu(struct xgene_pmu *xgene_pmu,
860 struct platform_device *pdev)
861{
862 void __iomem *csw_csr, *mcba_csr, *mcbb_csr;
863 struct resource *res;
864 unsigned int reg;
865
866 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
867 csw_csr = devm_ioremap_resource(&pdev->dev, res);
868 if (IS_ERR(csw_csr)) {
869 dev_err(&pdev->dev, "ioremap failed for CSW CSR resource\n");
870 return PTR_ERR(csw_csr);
871 }
872
873 res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
874 mcba_csr = devm_ioremap_resource(&pdev->dev, res);
875 if (IS_ERR(mcba_csr)) {
876 dev_err(&pdev->dev, "ioremap failed for MCBA CSR resource\n");
877 return PTR_ERR(mcba_csr);
878 }
879
880 res = platform_get_resource(pdev, IORESOURCE_MEM, 3);
881 mcbb_csr = devm_ioremap_resource(&pdev->dev, res);
882 if (IS_ERR(mcbb_csr)) {
883 dev_err(&pdev->dev, "ioremap failed for MCBB CSR resource\n");
884 return PTR_ERR(mcbb_csr);
885 }
886
887 reg = readl(csw_csr + CSW_CSWCR);
888 if (reg & CSW_CSWCR_DUALMCB_MASK) {
889 /* Dual MCB active */
890 xgene_pmu->mcb_active_mask = 0x3;
891 /* Probe all active MC(s) */
892 reg = readl(mcbb_csr + CSW_CSWCR);
893 xgene_pmu->mc_active_mask =
894 (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0xF : 0x5;
895 } else {
896 /* Single MCB active */
897 xgene_pmu->mcb_active_mask = 0x1;
898 /* Probe all active MC(s) */
899 reg = readl(mcba_csr + CSW_CSWCR);
900 xgene_pmu->mc_active_mask =
901 (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0x3 : 0x1;
902 }
903
904 return 0;
905}
906
907static int fdt_pmu_probe_active_mcb_mcu(struct xgene_pmu *xgene_pmu,
908 struct platform_device *pdev)
909{
910 struct regmap *csw_map, *mcba_map, *mcbb_map;
911 struct device_node *np = pdev->dev.of_node;
912 unsigned int reg;
913
914 csw_map = syscon_regmap_lookup_by_phandle(np, "regmap-csw");
915 if (IS_ERR(csw_map)) {
916 dev_err(&pdev->dev, "unable to get syscon regmap csw\n");
917 return PTR_ERR(csw_map);
918 }
919
920 mcba_map = syscon_regmap_lookup_by_phandle(np, "regmap-mcba");
921 if (IS_ERR(mcba_map)) {
922 dev_err(&pdev->dev, "unable to get syscon regmap mcba\n");
923 return PTR_ERR(mcba_map);
924 }
925
926 mcbb_map = syscon_regmap_lookup_by_phandle(np, "regmap-mcbb");
927 if (IS_ERR(mcbb_map)) {
928 dev_err(&pdev->dev, "unable to get syscon regmap mcbb\n");
929 return PTR_ERR(mcbb_map);
930 }
931
932 if (regmap_read(csw_map, CSW_CSWCR, &reg))
933 return -EINVAL;
934
935 if (reg & CSW_CSWCR_DUALMCB_MASK) {
936 /* Dual MCB active */
937 xgene_pmu->mcb_active_mask = 0x3;
938 /* Probe all active MC(s) */
939 if (regmap_read(mcbb_map, MCBADDRMR, &reg))
940 return 0;
941 xgene_pmu->mc_active_mask =
942 (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0xF : 0x5;
943 } else {
944 /* Single MCB active */
945 xgene_pmu->mcb_active_mask = 0x1;
946 /* Probe all active MC(s) */
947 if (regmap_read(mcba_map, MCBADDRMR, &reg))
948 return 0;
949 xgene_pmu->mc_active_mask =
950 (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0x3 : 0x1;
951 }
952
953 return 0;
954}
955
956static int xgene_pmu_probe_active_mcb_mcu(struct xgene_pmu *xgene_pmu,
957 struct platform_device *pdev)
958{
959 if (has_acpi_companion(&pdev->dev))
960 return acpi_pmu_probe_active_mcb_mcu(xgene_pmu, pdev);
961 return fdt_pmu_probe_active_mcb_mcu(xgene_pmu, pdev);
962}
963
964static char *xgene_pmu_dev_name(struct device *dev, u32 type, int id)
965{
966 switch (type) {
967 case PMU_TYPE_L3C:
968 return devm_kasprintf(dev, GFP_KERNEL, "l3c%d", id);
969 case PMU_TYPE_IOB:
970 return devm_kasprintf(dev, GFP_KERNEL, "iob%d", id);
971 case PMU_TYPE_MCB:
972 return devm_kasprintf(dev, GFP_KERNEL, "mcb%d", id);
973 case PMU_TYPE_MC:
974 return devm_kasprintf(dev, GFP_KERNEL, "mc%d", id);
975 default:
976 return devm_kasprintf(dev, GFP_KERNEL, "unknown");
977 }
978}
979
980#if defined(CONFIG_ACPI)
981static int acpi_pmu_dev_add_resource(struct acpi_resource *ares, void *data)
982{
983 struct resource *res = data;
984
985 if (ares->type == ACPI_RESOURCE_TYPE_FIXED_MEMORY32)
986 acpi_dev_resource_memory(ares, res);
987
988 /* Always tell the ACPI core to skip this resource */
989 return 1;
990}
991
992static struct
993xgene_pmu_dev_ctx *acpi_get_pmu_hw_inf(struct xgene_pmu *xgene_pmu,
994 struct acpi_device *adev, u32 type)
995{
996 struct device *dev = xgene_pmu->dev;
997 struct list_head resource_list;
998 struct xgene_pmu_dev_ctx *ctx;
999 const union acpi_object *obj;
1000 struct hw_pmu_info *inf;
1001 void __iomem *dev_csr;
1002 struct resource res;
1003 int enable_bit;
1004 int rc;
1005
1006 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
1007 if (!ctx)
1008 return NULL;
1009
1010 INIT_LIST_HEAD(&resource_list);
1011 rc = acpi_dev_get_resources(adev, &resource_list,
1012 acpi_pmu_dev_add_resource, &res);
1013 acpi_dev_free_resource_list(&resource_list);
1014 if (rc < 0 || IS_ERR(&res)) {
1015 dev_err(dev, "PMU type %d: No resource address found\n", type);
1016 goto err;
1017 }
1018
1019 dev_csr = devm_ioremap_resource(dev, &res);
1020 if (IS_ERR(dev_csr)) {
1021 dev_err(dev, "PMU type %d: Fail to map resource\n", type);
1022 goto err;
1023 }
1024
1025 /* A PMU device node without enable-bit-index is always enabled */
1026 rc = acpi_dev_get_property(adev, "enable-bit-index",
1027 ACPI_TYPE_INTEGER, &obj);
1028 if (rc < 0)
1029 enable_bit = 0;
1030 else
1031 enable_bit = (int) obj->integer.value;
1032
1033 ctx->name = xgene_pmu_dev_name(dev, type, enable_bit);
1034 if (!ctx->name) {
1035 dev_err(dev, "PMU type %d: Fail to get device name\n", type);
1036 goto err;
1037 }
1038 inf = &ctx->inf;
1039 inf->type = type;
1040 inf->csr = dev_csr;
1041 inf->enable_mask = 1 << enable_bit;
1042
1043 return ctx;
1044err:
1045 devm_kfree(dev, ctx);
1046 return NULL;
1047}
1048
1049static acpi_status acpi_pmu_dev_add(acpi_handle handle, u32 level,
1050 void *data, void **return_value)
1051{
1052 struct xgene_pmu *xgene_pmu = data;
1053 struct xgene_pmu_dev_ctx *ctx;
1054 struct acpi_device *adev;
1055
1056 if (acpi_bus_get_device(handle, &adev))
1057 return AE_OK;
1058 if (acpi_bus_get_status(adev) || !adev->status.present)
1059 return AE_OK;
1060
1061 if (!strcmp(acpi_device_hid(adev), "APMC0D5D"))
1062 ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, PMU_TYPE_L3C);
1063 else if (!strcmp(acpi_device_hid(adev), "APMC0D5E"))
1064 ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, PMU_TYPE_IOB);
1065 else if (!strcmp(acpi_device_hid(adev), "APMC0D5F"))
1066 ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, PMU_TYPE_MCB);
1067 else if (!strcmp(acpi_device_hid(adev), "APMC0D60"))
1068 ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, PMU_TYPE_MC);
1069 else
1070 ctx = NULL;
1071
1072 if (!ctx)
1073 return AE_OK;
1074
1075 if (xgene_pmu_dev_add(xgene_pmu, ctx)) {
1076 /* Can't add the PMU device, skip it */
1077 devm_kfree(xgene_pmu->dev, ctx);
1078 return AE_OK;
1079 }
1080
1081 switch (ctx->inf.type) {
1082 case PMU_TYPE_L3C:
1083 list_add(&ctx->next, &xgene_pmu->l3cpmus);
1084 break;
1085 case PMU_TYPE_IOB:
1086 list_add(&ctx->next, &xgene_pmu->iobpmus);
1087 break;
1088 case PMU_TYPE_MCB:
1089 list_add(&ctx->next, &xgene_pmu->mcbpmus);
1090 break;
1091 case PMU_TYPE_MC:
1092 list_add(&ctx->next, &xgene_pmu->mcpmus);
1093 break;
1094 }
1095 return AE_OK;
1096}
1097
1098static int acpi_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
1099 struct platform_device *pdev)
1100{
1101 struct device *dev = xgene_pmu->dev;
1102 acpi_handle handle;
1103 acpi_status status;
1104
1105 handle = ACPI_HANDLE(dev);
1106 if (!handle)
1107 return -EINVAL;
1108
1109 status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
1110 acpi_pmu_dev_add, NULL, xgene_pmu, NULL);
1111 if (ACPI_FAILURE(status)) {
1112 dev_err(dev, "failed to probe PMU devices\n");
1113 return -ENODEV;
1114 }
1115
1116 return 0;
1117}
1118#else
1119static int acpi_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
1120 struct platform_device *pdev)
1121{
1122 return 0;
1123}
1124#endif
1125
1126static struct
1127xgene_pmu_dev_ctx *fdt_get_pmu_hw_inf(struct xgene_pmu *xgene_pmu,
1128 struct device_node *np, u32 type)
1129{
1130 struct device *dev = xgene_pmu->dev;
1131 struct xgene_pmu_dev_ctx *ctx;
1132 struct hw_pmu_info *inf;
1133 void __iomem *dev_csr;
1134 struct resource res;
1135 int enable_bit;
1136 int rc;
1137
1138 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
1139 if (!ctx)
1140 return NULL;
1141 rc = of_address_to_resource(np, 0, &res);
1142 if (rc < 0) {
1143 dev_err(dev, "PMU type %d: No resource address found\n", type);
1144 goto err;
1145 }
1146 dev_csr = devm_ioremap_resource(dev, &res);
1147 if (IS_ERR(dev_csr)) {
1148 dev_err(dev, "PMU type %d: Fail to map resource\n", type);
1149 goto err;
1150 }
1151
1152 /* A PMU device node without enable-bit-index is always enabled */
1153 if (of_property_read_u32(np, "enable-bit-index", &enable_bit))
1154 enable_bit = 0;
1155
1156 ctx->name = xgene_pmu_dev_name(dev, type, enable_bit);
1157 if (!ctx->name) {
1158 dev_err(dev, "PMU type %d: Fail to get device name\n", type);
1159 goto err;
1160 }
1161 inf = &ctx->inf;
1162 inf->type = type;
1163 inf->csr = dev_csr;
1164 inf->enable_mask = 1 << enable_bit;
1165
1166 return ctx;
1167err:
1168 devm_kfree(dev, ctx);
1169 return NULL;
1170}
1171
1172static int fdt_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
1173 struct platform_device *pdev)
1174{
1175 struct xgene_pmu_dev_ctx *ctx;
1176 struct device_node *np;
1177
1178 for_each_child_of_node(pdev->dev.of_node, np) {
1179 if (!of_device_is_available(np))
1180 continue;
1181
1182 if (of_device_is_compatible(np, "apm,xgene-pmu-l3c"))
1183 ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_L3C);
1184 else if (of_device_is_compatible(np, "apm,xgene-pmu-iob"))
1185 ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_IOB);
1186 else if (of_device_is_compatible(np, "apm,xgene-pmu-mcb"))
1187 ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_MCB);
1188 else if (of_device_is_compatible(np, "apm,xgene-pmu-mc"))
1189 ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_MC);
1190 else
1191 ctx = NULL;
1192
1193 if (!ctx)
1194 continue;
1195
1196 if (xgene_pmu_dev_add(xgene_pmu, ctx)) {
1197 /* Can't add the PMU device, skip it */
1198 devm_kfree(xgene_pmu->dev, ctx);
1199 continue;
1200 }
1201
1202 switch (ctx->inf.type) {
1203 case PMU_TYPE_L3C:
1204 list_add(&ctx->next, &xgene_pmu->l3cpmus);
1205 break;
1206 case PMU_TYPE_IOB:
1207 list_add(&ctx->next, &xgene_pmu->iobpmus);
1208 break;
1209 case PMU_TYPE_MCB:
1210 list_add(&ctx->next, &xgene_pmu->mcbpmus);
1211 break;
1212 case PMU_TYPE_MC:
1213 list_add(&ctx->next, &xgene_pmu->mcpmus);
1214 break;
1215 }
1216 }
1217
1218 return 0;
1219}
1220
1221static int xgene_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
1222 struct platform_device *pdev)
1223{
1224 if (has_acpi_companion(&pdev->dev))
1225 return acpi_pmu_probe_pmu_dev(xgene_pmu, pdev);
1226 return fdt_pmu_probe_pmu_dev(xgene_pmu, pdev);
1227}
1228
1229static const struct xgene_pmu_data xgene_pmu_data = {
1230 .id = PCP_PMU_V1,
1231};
1232
1233static const struct xgene_pmu_data xgene_pmu_v2_data = {
1234 .id = PCP_PMU_V2,
1235};
1236
1237static const struct of_device_id xgene_pmu_of_match[] = {
1238 { .compatible = "apm,xgene-pmu", .data = &xgene_pmu_data },
1239 { .compatible = "apm,xgene-pmu-v2", .data = &xgene_pmu_v2_data },
1240 {},
1241};
1242MODULE_DEVICE_TABLE(of, xgene_pmu_of_match);
1243#ifdef CONFIG_ACPI
1244static const struct acpi_device_id xgene_pmu_acpi_match[] = {
1245 {"APMC0D5B", PCP_PMU_V1},
1246 {"APMC0D5C", PCP_PMU_V2},
1247 {},
1248};
1249MODULE_DEVICE_TABLE(acpi, xgene_pmu_acpi_match);
1250#endif
1251
1252static int xgene_pmu_probe(struct platform_device *pdev)
1253{
1254 const struct xgene_pmu_data *dev_data;
1255 const struct of_device_id *of_id;
1256 struct xgene_pmu *xgene_pmu;
1257 struct resource *res;
1258 int irq, rc;
1259 int version;
1260
1261 xgene_pmu = devm_kzalloc(&pdev->dev, sizeof(*xgene_pmu), GFP_KERNEL);
1262 if (!xgene_pmu)
1263 return -ENOMEM;
1264 xgene_pmu->dev = &pdev->dev;
1265 platform_set_drvdata(pdev, xgene_pmu);
1266
1267 version = -EINVAL;
1268 of_id = of_match_device(xgene_pmu_of_match, &pdev->dev);
1269 if (of_id) {
1270 dev_data = (const struct xgene_pmu_data *) of_id->data;
1271 version = dev_data->id;
1272 }
1273
1274#ifdef CONFIG_ACPI
1275 if (ACPI_COMPANION(&pdev->dev)) {
1276 const struct acpi_device_id *acpi_id;
1277
1278 acpi_id = acpi_match_device(xgene_pmu_acpi_match, &pdev->dev);
1279 if (acpi_id)
1280 version = (int) acpi_id->driver_data;
1281 }
1282#endif
1283 if (version < 0)
1284 return -ENODEV;
1285
1286 INIT_LIST_HEAD(&xgene_pmu->l3cpmus);
1287 INIT_LIST_HEAD(&xgene_pmu->iobpmus);
1288 INIT_LIST_HEAD(&xgene_pmu->mcbpmus);
1289 INIT_LIST_HEAD(&xgene_pmu->mcpmus);
1290
1291 xgene_pmu->version = version;
1292 dev_info(&pdev->dev, "X-Gene PMU version %d\n", xgene_pmu->version);
1293
1294 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1295 xgene_pmu->pcppmu_csr = devm_ioremap_resource(&pdev->dev, res);
1296 if (IS_ERR(xgene_pmu->pcppmu_csr)) {
1297 dev_err(&pdev->dev, "ioremap failed for PCP PMU resource\n");
1298 rc = PTR_ERR(xgene_pmu->pcppmu_csr);
1299 goto err;
1300 }
1301
1302 irq = platform_get_irq(pdev, 0);
1303 if (irq < 0) {
1304 dev_err(&pdev->dev, "No IRQ resource\n");
1305 rc = -EINVAL;
1306 goto err;
1307 }
1308 rc = devm_request_irq(&pdev->dev, irq, xgene_pmu_isr,
1309 IRQF_NOBALANCING | IRQF_NO_THREAD,
1310 dev_name(&pdev->dev), xgene_pmu);
1311 if (rc) {
1312 dev_err(&pdev->dev, "Could not request IRQ %d\n", irq);
1313 goto err;
1314 }
1315
1316 raw_spin_lock_init(&xgene_pmu->lock);
1317
1318 /* Check for active MCBs and MCUs */
1319 rc = xgene_pmu_probe_active_mcb_mcu(xgene_pmu, pdev);
1320 if (rc) {
1321 dev_warn(&pdev->dev, "Unknown MCB/MCU active status\n");
1322 xgene_pmu->mcb_active_mask = 0x1;
1323 xgene_pmu->mc_active_mask = 0x1;
1324 }
1325
1326 /* Pick one core to use for cpumask attributes */
1327 cpumask_set_cpu(smp_processor_id(), &xgene_pmu->cpu);
1328
1329 /* Make sure that the overflow interrupt is handled by this CPU */
1330 rc = irq_set_affinity(irq, &xgene_pmu->cpu);
1331 if (rc) {
1332 dev_err(&pdev->dev, "Failed to set interrupt affinity!\n");
1333 goto err;
1334 }
1335
1336 /* Walk through the tree for all PMU perf devices */
1337 rc = xgene_pmu_probe_pmu_dev(xgene_pmu, pdev);
1338 if (rc) {
1339 dev_err(&pdev->dev, "No PMU perf devices found!\n");
1340 goto err;
1341 }
1342
1343 /* Enable interrupt */
1344 xgene_pmu_unmask_int(xgene_pmu);
1345
1346 return 0;
1347
1348err:
1349 if (xgene_pmu->pcppmu_csr)
1350 devm_iounmap(&pdev->dev, xgene_pmu->pcppmu_csr);
1351 devm_kfree(&pdev->dev, xgene_pmu);
1352
1353 return rc;
1354}
1355
1356static void
1357xgene_pmu_dev_cleanup(struct xgene_pmu *xgene_pmu, struct list_head *pmus)
1358{
1359 struct xgene_pmu_dev_ctx *ctx;
1360 struct device *dev = xgene_pmu->dev;
1361 struct xgene_pmu_dev *pmu_dev;
1362
1363 list_for_each_entry(ctx, pmus, next) {
1364 pmu_dev = ctx->pmu_dev;
1365 if (pmu_dev->inf->csr)
1366 devm_iounmap(dev, pmu_dev->inf->csr);
1367 devm_kfree(dev, ctx);
1368 devm_kfree(dev, pmu_dev);
1369 }
1370}
1371
1372static int xgene_pmu_remove(struct platform_device *pdev)
1373{
1374 struct xgene_pmu *xgene_pmu = dev_get_drvdata(&pdev->dev);
1375
1376 xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->l3cpmus);
1377 xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->iobpmus);
1378 xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->mcbpmus);
1379 xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->mcpmus);
1380
1381 if (xgene_pmu->pcppmu_csr)
1382 devm_iounmap(&pdev->dev, xgene_pmu->pcppmu_csr);
1383 devm_kfree(&pdev->dev, xgene_pmu);
1384
1385 return 0;
1386}
1387
1388static struct platform_driver xgene_pmu_driver = {
1389 .probe = xgene_pmu_probe,
1390 .remove = xgene_pmu_remove,
1391 .driver = {
1392 .name = "xgene-pmu",
1393 .of_match_table = xgene_pmu_of_match,
1394 .acpi_match_table = ACPI_PTR(xgene_pmu_acpi_match),
1395 },
1396};
1397
1398builtin_platform_driver(xgene_pmu_driver);
generated by cgit v1.2.2 (git 2.25.0) at 2026-04-28 11:18:19 -0400