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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 *
4 * Copyright (C) 2014 ARM Limited
5 */
6
7#include <linux/ctype.h>
8#include <linux/hrtimer.h>
9#include <linux/idr.h>
10#include <linux/interrupt.h>
11#include <linux/io.h>
12#include <linux/module.h>
13#include <linux/mod_devicetable.h>
14#include <linux/perf_event.h>
15#include <linux/platform_device.h>
16#include <linux/slab.h>
17
18#define CCN_NUM_XP_PORTS 2
19#define CCN_NUM_VCS 4
20#define CCN_NUM_REGIONS 256
21#define CCN_REGION_SIZE 0x10000
22
23#define CCN_ALL_OLY_ID 0xff00
24#define CCN_ALL_OLY_ID__OLY_ID__SHIFT 0
25#define CCN_ALL_OLY_ID__OLY_ID__MASK 0x1f
26#define CCN_ALL_OLY_ID__NODE_ID__SHIFT 8
27#define CCN_ALL_OLY_ID__NODE_ID__MASK 0x3f
28
29#define CCN_MN_ERRINT_STATUS 0x0008
30#define CCN_MN_ERRINT_STATUS__INTREQ__DESSERT 0x11
31#define CCN_MN_ERRINT_STATUS__ALL_ERRORS__ENABLE 0x02
32#define CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLED 0x20
33#define CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLE 0x22
34#define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_ENABLE 0x04
35#define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_DISABLED 0x40
36#define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_DISABLE 0x44
37#define CCN_MN_ERRINT_STATUS__PMU_EVENTS__ENABLE 0x08
38#define CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLED 0x80
39#define CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLE 0x88
40#define CCN_MN_OLY_COMP_LIST_63_0 0x01e0
41#define CCN_MN_ERR_SIG_VAL_63_0 0x0300
42#define CCN_MN_ERR_SIG_VAL_63_0__DT (1 << 1)
43
44#define CCN_DT_ACTIVE_DSM 0x0000
45#define CCN_DT_ACTIVE_DSM__DSM_ID__SHIFT(n) ((n) * 8)
46#define CCN_DT_ACTIVE_DSM__DSM_ID__MASK 0xff
47#define CCN_DT_CTL 0x0028
48#define CCN_DT_CTL__DT_EN (1 << 0)
49#define CCN_DT_PMEVCNT(n) (0x0100 + (n) * 0x8)
50#define CCN_DT_PMCCNTR 0x0140
51#define CCN_DT_PMCCNTRSR 0x0190
52#define CCN_DT_PMOVSR 0x0198
53#define CCN_DT_PMOVSR_CLR 0x01a0
54#define CCN_DT_PMOVSR_CLR__MASK 0x1f
55#define CCN_DT_PMCR 0x01a8
56#define CCN_DT_PMCR__OVFL_INTR_EN (1 << 6)
57#define CCN_DT_PMCR__PMU_EN (1 << 0)
58#define CCN_DT_PMSR 0x01b0
59#define CCN_DT_PMSR_REQ 0x01b8
60#define CCN_DT_PMSR_CLR 0x01c0
61
62#define CCN_HNF_PMU_EVENT_SEL 0x0600
63#define CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4)
64#define CCN_HNF_PMU_EVENT_SEL__ID__MASK 0xf
65
66#define CCN_XP_DT_CONFIG 0x0300
67#define CCN_XP_DT_CONFIG__DT_CFG__SHIFT(n) ((n) * 4)
68#define CCN_XP_DT_CONFIG__DT_CFG__MASK 0xf
69#define CCN_XP_DT_CONFIG__DT_CFG__PASS_THROUGH 0x0
70#define CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT_0_OR_1 0x1
71#define CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT(n) (0x2 + (n))
72#define CCN_XP_DT_CONFIG__DT_CFG__XP_PMU_EVENT(n) (0x4 + (n))
73#define CCN_XP_DT_CONFIG__DT_CFG__DEVICE_PMU_EVENT(d, n) (0x8 + (d) * 4 + (n))
74#define CCN_XP_DT_INTERFACE_SEL 0x0308
75#define CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__SHIFT(n) (0 + (n) * 8)
76#define CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__MASK 0x1
77#define CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__SHIFT(n) (1 + (n) * 8)
78#define CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__MASK 0x1
79#define CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__SHIFT(n) (2 + (n) * 8)
80#define CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__MASK 0x3
81#define CCN_XP_DT_CMP_VAL_L(n) (0x0310 + (n) * 0x40)
82#define CCN_XP_DT_CMP_VAL_H(n) (0x0318 + (n) * 0x40)
83#define CCN_XP_DT_CMP_MASK_L(n) (0x0320 + (n) * 0x40)
84#define CCN_XP_DT_CMP_MASK_H(n) (0x0328 + (n) * 0x40)
85#define CCN_XP_DT_CONTROL 0x0370
86#define CCN_XP_DT_CONTROL__DT_ENABLE (1 << 0)
87#define CCN_XP_DT_CONTROL__WP_ARM_SEL__SHIFT(n) (12 + (n) * 4)
88#define CCN_XP_DT_CONTROL__WP_ARM_SEL__MASK 0xf
89#define CCN_XP_DT_CONTROL__WP_ARM_SEL__ALWAYS 0xf
90#define CCN_XP_PMU_EVENT_SEL 0x0600
91#define CCN_XP_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 7)
92#define CCN_XP_PMU_EVENT_SEL__ID__MASK 0x3f
93
94#define CCN_SBAS_PMU_EVENT_SEL 0x0600
95#define CCN_SBAS_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4)
96#define CCN_SBAS_PMU_EVENT_SEL__ID__MASK 0xf
97
98#define CCN_RNI_PMU_EVENT_SEL 0x0600
99#define CCN_RNI_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4)
100#define CCN_RNI_PMU_EVENT_SEL__ID__MASK 0xf
101
102#define CCN_TYPE_MN 0x01
103#define CCN_TYPE_DT 0x02
104#define CCN_TYPE_HNF 0x04
105#define CCN_TYPE_HNI 0x05
106#define CCN_TYPE_XP 0x08
107#define CCN_TYPE_SBSX 0x0c
108#define CCN_TYPE_SBAS 0x10
109#define CCN_TYPE_RNI_1P 0x14
110#define CCN_TYPE_RNI_2P 0x15
111#define CCN_TYPE_RNI_3P 0x16
112#define CCN_TYPE_RND_1P 0x18 /* RN-D = RN-I + DVM */
113#define CCN_TYPE_RND_2P 0x19
114#define CCN_TYPE_RND_3P 0x1a
115#define CCN_TYPE_CYCLES 0xff /* Pseudotype */
116
117#define CCN_EVENT_WATCHPOINT 0xfe /* Pseudoevent */
118
119#define CCN_NUM_PMU_EVENTS 4
120#define CCN_NUM_XP_WATCHPOINTS 2 /* See DT.dbg_id.num_watchpoints */
121#define CCN_NUM_PMU_EVENT_COUNTERS 8 /* See DT.dbg_id.num_pmucntr */
122#define CCN_IDX_PMU_CYCLE_COUNTER CCN_NUM_PMU_EVENT_COUNTERS
123
124#define CCN_NUM_PREDEFINED_MASKS 4
125#define CCN_IDX_MASK_ANY (CCN_NUM_PMU_EVENT_COUNTERS + 0)
126#define CCN_IDX_MASK_EXACT (CCN_NUM_PMU_EVENT_COUNTERS + 1)
127#define CCN_IDX_MASK_ORDER (CCN_NUM_PMU_EVENT_COUNTERS + 2)
128#define CCN_IDX_MASK_OPCODE (CCN_NUM_PMU_EVENT_COUNTERS + 3)
129
130struct arm_ccn_component {
131 void __iomem *base;
132 u32 type;
133
134 DECLARE_BITMAP(pmu_events_mask, CCN_NUM_PMU_EVENTS);
135 union {
136 struct {
137 DECLARE_BITMAP(dt_cmp_mask, CCN_NUM_XP_WATCHPOINTS);
138 } xp;
139 };
140};
141
142#define pmu_to_arm_ccn(_pmu) container_of(container_of(_pmu, \
143 struct arm_ccn_dt, pmu), struct arm_ccn, dt)
144
145struct arm_ccn_dt {
146 int id;
147 void __iomem *base;
148
149 spinlock_t config_lock;
150
151 DECLARE_BITMAP(pmu_counters_mask, CCN_NUM_PMU_EVENT_COUNTERS + 1);
152 struct {
153 struct arm_ccn_component *source;
154 struct perf_event *event;
155 } pmu_counters[CCN_NUM_PMU_EVENT_COUNTERS + 1];
156
157 struct {
158 u64 l, h;
159 } cmp_mask[CCN_NUM_PMU_EVENT_COUNTERS + CCN_NUM_PREDEFINED_MASKS];
160
161 struct hrtimer hrtimer;
162
163 unsigned int cpu;
164 struct hlist_node node;
165
166 struct pmu pmu;
167};
168
169struct arm_ccn {
170 struct device *dev;
171 void __iomem *base;
172 unsigned int irq;
173
174 unsigned sbas_present:1;
175 unsigned sbsx_present:1;
176
177 int num_nodes;
178 struct arm_ccn_component *node;
179
180 int num_xps;
181 struct arm_ccn_component *xp;
182
183 struct arm_ccn_dt dt;
184 int mn_id;
185};
186
187static int arm_ccn_node_to_xp(int node)
188{
189 return node / CCN_NUM_XP_PORTS;
190}
191
192static int arm_ccn_node_to_xp_port(int node)
193{
194 return node % CCN_NUM_XP_PORTS;
195}
196
197
198/*
199 * Bit shifts and masks in these defines must be kept in sync with
200 * arm_ccn_pmu_config_set() and CCN_FORMAT_ATTRs below!
201 */
202#define CCN_CONFIG_NODE(_config) (((_config) >> 0) & 0xff)
203#define CCN_CONFIG_XP(_config) (((_config) >> 0) & 0xff)
204#define CCN_CONFIG_TYPE(_config) (((_config) >> 8) & 0xff)
205#define CCN_CONFIG_EVENT(_config) (((_config) >> 16) & 0xff)
206#define CCN_CONFIG_PORT(_config) (((_config) >> 24) & 0x3)
207#define CCN_CONFIG_BUS(_config) (((_config) >> 24) & 0x3)
208#define CCN_CONFIG_VC(_config) (((_config) >> 26) & 0x7)
209#define CCN_CONFIG_DIR(_config) (((_config) >> 29) & 0x1)
210#define CCN_CONFIG_MASK(_config) (((_config) >> 30) & 0xf)
211
212static void arm_ccn_pmu_config_set(u64 *config, u32 node_xp, u32 type, u32 port)
213{
214 *config &= ~((0xff << 0) | (0xff << 8) | (0x3 << 24));
215 *config |= (node_xp << 0) | (type << 8) | (port << 24);
216}
217
218static ssize_t arm_ccn_pmu_format_show(struct device *dev,
219 struct device_attribute *attr, char *buf)
220{
221 struct dev_ext_attribute *ea = container_of(attr,
222 struct dev_ext_attribute, attr);
223
224 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)ea->var);
225}
226
227#define CCN_FORMAT_ATTR(_name, _config) \
228 struct dev_ext_attribute arm_ccn_pmu_format_attr_##_name = \
229 { __ATTR(_name, S_IRUGO, arm_ccn_pmu_format_show, \
230 NULL), _config }
231
232static CCN_FORMAT_ATTR(node, "config:0-7");
233static CCN_FORMAT_ATTR(xp, "config:0-7");
234static CCN_FORMAT_ATTR(type, "config:8-15");
235static CCN_FORMAT_ATTR(event, "config:16-23");
236static CCN_FORMAT_ATTR(port, "config:24-25");
237static CCN_FORMAT_ATTR(bus, "config:24-25");
238static CCN_FORMAT_ATTR(vc, "config:26-28");
239static CCN_FORMAT_ATTR(dir, "config:29-29");
240static CCN_FORMAT_ATTR(mask, "config:30-33");
241static CCN_FORMAT_ATTR(cmp_l, "config1:0-62");
242static CCN_FORMAT_ATTR(cmp_h, "config2:0-59");
243
244static struct attribute *arm_ccn_pmu_format_attrs[] = {
245 &arm_ccn_pmu_format_attr_node.attr.attr,
246 &arm_ccn_pmu_format_attr_xp.attr.attr,
247 &arm_ccn_pmu_format_attr_type.attr.attr,
248 &arm_ccn_pmu_format_attr_event.attr.attr,
249 &arm_ccn_pmu_format_attr_port.attr.attr,
250 &arm_ccn_pmu_format_attr_bus.attr.attr,
251 &arm_ccn_pmu_format_attr_vc.attr.attr,
252 &arm_ccn_pmu_format_attr_dir.attr.attr,
253 &arm_ccn_pmu_format_attr_mask.attr.attr,
254 &arm_ccn_pmu_format_attr_cmp_l.attr.attr,
255 &arm_ccn_pmu_format_attr_cmp_h.attr.attr,
256 NULL
257};
258
259static const struct attribute_group arm_ccn_pmu_format_attr_group = {
260 .name = "format",
261 .attrs = arm_ccn_pmu_format_attrs,
262};
263
264
265struct arm_ccn_pmu_event {
266 struct device_attribute attr;
267 u32 type;
268 u32 event;
269 int num_ports;
270 int num_vcs;
271 const char *def;
272 int mask;
273};
274
275#define CCN_EVENT_ATTR(_name) \
276 __ATTR(_name, S_IRUGO, arm_ccn_pmu_event_show, NULL)
277
278/*
279 * Events defined in TRM for MN, HN-I and SBSX are actually watchpoints set on
280 * their ports in XP they are connected to. For the sake of usability they are
281 * explicitly defined here (and translated into a relevant watchpoint in
282 * arm_ccn_pmu_event_init()) so the user can easily request them without deep
283 * knowledge of the flit format.
284 */
285
286#define CCN_EVENT_MN(_name, _def, _mask) { .attr = CCN_EVENT_ATTR(mn_##_name), \
287 .type = CCN_TYPE_MN, .event = CCN_EVENT_WATCHPOINT, \
288 .num_ports = CCN_NUM_XP_PORTS, .num_vcs = CCN_NUM_VCS, \
289 .def = _def, .mask = _mask, }
290
291#define CCN_EVENT_HNI(_name, _def, _mask) { \
292 .attr = CCN_EVENT_ATTR(hni_##_name), .type = CCN_TYPE_HNI, \
293 .event = CCN_EVENT_WATCHPOINT, .num_ports = CCN_NUM_XP_PORTS, \
294 .num_vcs = CCN_NUM_VCS, .def = _def, .mask = _mask, }
295
296#define CCN_EVENT_SBSX(_name, _def, _mask) { \
297 .attr = CCN_EVENT_ATTR(sbsx_##_name), .type = CCN_TYPE_SBSX, \
298 .event = CCN_EVENT_WATCHPOINT, .num_ports = CCN_NUM_XP_PORTS, \
299 .num_vcs = CCN_NUM_VCS, .def = _def, .mask = _mask, }
300
301#define CCN_EVENT_HNF(_name, _event) { .attr = CCN_EVENT_ATTR(hnf_##_name), \
302 .type = CCN_TYPE_HNF, .event = _event, }
303
304#define CCN_EVENT_XP(_name, _event) { .attr = CCN_EVENT_ATTR(xp_##_name), \
305 .type = CCN_TYPE_XP, .event = _event, \
306 .num_ports = CCN_NUM_XP_PORTS, .num_vcs = CCN_NUM_VCS, }
307
308/*
309 * RN-I & RN-D (RN-D = RN-I + DVM) nodes have different type ID depending
310 * on configuration. One of them is picked to represent the whole group,
311 * as they all share the same event types.
312 */
313#define CCN_EVENT_RNI(_name, _event) { .attr = CCN_EVENT_ATTR(rni_##_name), \
314 .type = CCN_TYPE_RNI_3P, .event = _event, }
315
316#define CCN_EVENT_SBAS(_name, _event) { .attr = CCN_EVENT_ATTR(sbas_##_name), \
317 .type = CCN_TYPE_SBAS, .event = _event, }
318
319#define CCN_EVENT_CYCLES(_name) { .attr = CCN_EVENT_ATTR(_name), \
320 .type = CCN_TYPE_CYCLES }
321
322
323static ssize_t arm_ccn_pmu_event_show(struct device *dev,
324 struct device_attribute *attr, char *buf)
325{
326 struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));
327 struct arm_ccn_pmu_event *event = container_of(attr,
328 struct arm_ccn_pmu_event, attr);
329 ssize_t res;
330
331 res = scnprintf(buf, PAGE_SIZE, "type=0x%x", event->type);
332 if (event->event)
333 res += scnprintf(buf + res, PAGE_SIZE - res, ",event=0x%x",
334 event->event);
335 if (event->def)
336 res += scnprintf(buf + res, PAGE_SIZE - res, ",%s",
337 event->def);
338 if (event->mask)
339 res += scnprintf(buf + res, PAGE_SIZE - res, ",mask=0x%x",
340 event->mask);
341
342 /* Arguments required by an event */
343 switch (event->type) {
344 case CCN_TYPE_CYCLES:
345 break;
346 case CCN_TYPE_XP:
347 res += scnprintf(buf + res, PAGE_SIZE - res,
348 ",xp=?,vc=?");
349 if (event->event == CCN_EVENT_WATCHPOINT)
350 res += scnprintf(buf + res, PAGE_SIZE - res,
351 ",port=?,dir=?,cmp_l=?,cmp_h=?,mask=?");
352 else
353 res += scnprintf(buf + res, PAGE_SIZE - res,
354 ",bus=?");
355
356 break;
357 case CCN_TYPE_MN:
358 res += scnprintf(buf + res, PAGE_SIZE - res, ",node=%d", ccn->mn_id);
359 break;
360 default:
361 res += scnprintf(buf + res, PAGE_SIZE - res, ",node=?");
362 break;
363 }
364
365 res += scnprintf(buf + res, PAGE_SIZE - res, "\n");
366
367 return res;
368}
369
370static umode_t arm_ccn_pmu_events_is_visible(struct kobject *kobj,
371 struct attribute *attr, int index)
372{
373 struct device *dev = kobj_to_dev(kobj);
374 struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));
375 struct device_attribute *dev_attr = container_of(attr,
376 struct device_attribute, attr);
377 struct arm_ccn_pmu_event *event = container_of(dev_attr,
378 struct arm_ccn_pmu_event, attr);
379
380 if (event->type == CCN_TYPE_SBAS && !ccn->sbas_present)
381 return 0;
382 if (event->type == CCN_TYPE_SBSX && !ccn->sbsx_present)
383 return 0;
384
385 return attr->mode;
386}
387
388static struct arm_ccn_pmu_event arm_ccn_pmu_events[] = {
389 CCN_EVENT_MN(eobarrier, "dir=1,vc=0,cmp_h=0x1c00", CCN_IDX_MASK_OPCODE),
390 CCN_EVENT_MN(ecbarrier, "dir=1,vc=0,cmp_h=0x1e00", CCN_IDX_MASK_OPCODE),
391 CCN_EVENT_MN(dvmop, "dir=1,vc=0,cmp_h=0x2800", CCN_IDX_MASK_OPCODE),
392 CCN_EVENT_HNI(txdatflits, "dir=1,vc=3", CCN_IDX_MASK_ANY),
393 CCN_EVENT_HNI(rxdatflits, "dir=0,vc=3", CCN_IDX_MASK_ANY),
394 CCN_EVENT_HNI(txreqflits, "dir=1,vc=0", CCN_IDX_MASK_ANY),
395 CCN_EVENT_HNI(rxreqflits, "dir=0,vc=0", CCN_IDX_MASK_ANY),
396 CCN_EVENT_HNI(rxreqflits_order, "dir=0,vc=0,cmp_h=0x8000",
397 CCN_IDX_MASK_ORDER),
398 CCN_EVENT_SBSX(txdatflits, "dir=1,vc=3", CCN_IDX_MASK_ANY),
399 CCN_EVENT_SBSX(rxdatflits, "dir=0,vc=3", CCN_IDX_MASK_ANY),
400 CCN_EVENT_SBSX(txreqflits, "dir=1,vc=0", CCN_IDX_MASK_ANY),
401 CCN_EVENT_SBSX(rxreqflits, "dir=0,vc=0", CCN_IDX_MASK_ANY),
402 CCN_EVENT_SBSX(rxreqflits_order, "dir=0,vc=0,cmp_h=0x8000",
403 CCN_IDX_MASK_ORDER),
404 CCN_EVENT_HNF(cache_miss, 0x1),
405 CCN_EVENT_HNF(l3_sf_cache_access, 0x02),
406 CCN_EVENT_HNF(cache_fill, 0x3),
407 CCN_EVENT_HNF(pocq_retry, 0x4),
408 CCN_EVENT_HNF(pocq_reqs_recvd, 0x5),
409 CCN_EVENT_HNF(sf_hit, 0x6),
410 CCN_EVENT_HNF(sf_evictions, 0x7),
411 CCN_EVENT_HNF(snoops_sent, 0x8),
412 CCN_EVENT_HNF(snoops_broadcast, 0x9),
413 CCN_EVENT_HNF(l3_eviction, 0xa),
414 CCN_EVENT_HNF(l3_fill_invalid_way, 0xb),
415 CCN_EVENT_HNF(mc_retries, 0xc),
416 CCN_EVENT_HNF(mc_reqs, 0xd),
417 CCN_EVENT_HNF(qos_hh_retry, 0xe),
418 CCN_EVENT_RNI(rdata_beats_p0, 0x1),
419 CCN_EVENT_RNI(rdata_beats_p1, 0x2),
420 CCN_EVENT_RNI(rdata_beats_p2, 0x3),
421 CCN_EVENT_RNI(rxdat_flits, 0x4),
422 CCN_EVENT_RNI(txdat_flits, 0x5),
423 CCN_EVENT_RNI(txreq_flits, 0x6),
424 CCN_EVENT_RNI(txreq_flits_retried, 0x7),
425 CCN_EVENT_RNI(rrt_full, 0x8),
426 CCN_EVENT_RNI(wrt_full, 0x9),
427 CCN_EVENT_RNI(txreq_flits_replayed, 0xa),
428 CCN_EVENT_XP(upload_starvation, 0x1),
429 CCN_EVENT_XP(download_starvation, 0x2),
430 CCN_EVENT_XP(respin, 0x3),
431 CCN_EVENT_XP(valid_flit, 0x4),
432 CCN_EVENT_XP(watchpoint, CCN_EVENT_WATCHPOINT),
433 CCN_EVENT_SBAS(rdata_beats_p0, 0x1),
434 CCN_EVENT_SBAS(rxdat_flits, 0x4),
435 CCN_EVENT_SBAS(txdat_flits, 0x5),
436 CCN_EVENT_SBAS(txreq_flits, 0x6),
437 CCN_EVENT_SBAS(txreq_flits_retried, 0x7),
438 CCN_EVENT_SBAS(rrt_full, 0x8),
439 CCN_EVENT_SBAS(wrt_full, 0x9),
440 CCN_EVENT_SBAS(txreq_flits_replayed, 0xa),
441 CCN_EVENT_CYCLES(cycles),
442};
443
444/* Populated in arm_ccn_init() */
445static struct attribute
446 *arm_ccn_pmu_events_attrs[ARRAY_SIZE(arm_ccn_pmu_events) + 1];
447
448static const struct attribute_group arm_ccn_pmu_events_attr_group = {
449 .name = "events",
450 .is_visible = arm_ccn_pmu_events_is_visible,
451 .attrs = arm_ccn_pmu_events_attrs,
452};
453
454
455static u64 *arm_ccn_pmu_get_cmp_mask(struct arm_ccn *ccn, const char *name)
456{
457 unsigned long i;
458
459 if (WARN_ON(!name || !name[0] || !isxdigit(name[0]) || !name[1]))
460 return NULL;
461 i = isdigit(name[0]) ? name[0] - '0' : 0xa + tolower(name[0]) - 'a';
462
463 switch (name[1]) {
464 case 'l':
465 return &ccn->dt.cmp_mask[i].l;
466 case 'h':
467 return &ccn->dt.cmp_mask[i].h;
468 default:
469 return NULL;
470 }
471}
472
473static ssize_t arm_ccn_pmu_cmp_mask_show(struct device *dev,
474 struct device_attribute *attr, char *buf)
475{
476 struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));
477 u64 *mask = arm_ccn_pmu_get_cmp_mask(ccn, attr->attr.name);
478
479 return mask ? snprintf(buf, PAGE_SIZE, "0x%016llx\n", *mask) : -EINVAL;
480}
481
482static ssize_t arm_ccn_pmu_cmp_mask_store(struct device *dev,
483 struct device_attribute *attr, const char *buf, size_t count)
484{
485 struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));
486 u64 *mask = arm_ccn_pmu_get_cmp_mask(ccn, attr->attr.name);
487 int err = -EINVAL;
488
489 if (mask)
490 err = kstrtoull(buf, 0, mask);
491
492 return err ? err : count;
493}
494
495#define CCN_CMP_MASK_ATTR(_name) \
496 struct device_attribute arm_ccn_pmu_cmp_mask_attr_##_name = \
497 __ATTR(_name, S_IRUGO | S_IWUSR, \
498 arm_ccn_pmu_cmp_mask_show, arm_ccn_pmu_cmp_mask_store)
499
500#define CCN_CMP_MASK_ATTR_RO(_name) \
501 struct device_attribute arm_ccn_pmu_cmp_mask_attr_##_name = \
502 __ATTR(_name, S_IRUGO, arm_ccn_pmu_cmp_mask_show, NULL)
503
504static CCN_CMP_MASK_ATTR(0l);
505static CCN_CMP_MASK_ATTR(0h);
506static CCN_CMP_MASK_ATTR(1l);
507static CCN_CMP_MASK_ATTR(1h);
508static CCN_CMP_MASK_ATTR(2l);
509static CCN_CMP_MASK_ATTR(2h);
510static CCN_CMP_MASK_ATTR(3l);
511static CCN_CMP_MASK_ATTR(3h);
512static CCN_CMP_MASK_ATTR(4l);
513static CCN_CMP_MASK_ATTR(4h);
514static CCN_CMP_MASK_ATTR(5l);
515static CCN_CMP_MASK_ATTR(5h);
516static CCN_CMP_MASK_ATTR(6l);
517static CCN_CMP_MASK_ATTR(6h);
518static CCN_CMP_MASK_ATTR(7l);
519static CCN_CMP_MASK_ATTR(7h);
520static CCN_CMP_MASK_ATTR_RO(8l);
521static CCN_CMP_MASK_ATTR_RO(8h);
522static CCN_CMP_MASK_ATTR_RO(9l);
523static CCN_CMP_MASK_ATTR_RO(9h);
524static CCN_CMP_MASK_ATTR_RO(al);
525static CCN_CMP_MASK_ATTR_RO(ah);
526static CCN_CMP_MASK_ATTR_RO(bl);
527static CCN_CMP_MASK_ATTR_RO(bh);
528
529static struct attribute *arm_ccn_pmu_cmp_mask_attrs[] = {
530 &arm_ccn_pmu_cmp_mask_attr_0l.attr, &arm_ccn_pmu_cmp_mask_attr_0h.attr,
531 &arm_ccn_pmu_cmp_mask_attr_1l.attr, &arm_ccn_pmu_cmp_mask_attr_1h.attr,
532 &arm_ccn_pmu_cmp_mask_attr_2l.attr, &arm_ccn_pmu_cmp_mask_attr_2h.attr,
533 &arm_ccn_pmu_cmp_mask_attr_3l.attr, &arm_ccn_pmu_cmp_mask_attr_3h.attr,
534 &arm_ccn_pmu_cmp_mask_attr_4l.attr, &arm_ccn_pmu_cmp_mask_attr_4h.attr,
535 &arm_ccn_pmu_cmp_mask_attr_5l.attr, &arm_ccn_pmu_cmp_mask_attr_5h.attr,
536 &arm_ccn_pmu_cmp_mask_attr_6l.attr, &arm_ccn_pmu_cmp_mask_attr_6h.attr,
537 &arm_ccn_pmu_cmp_mask_attr_7l.attr, &arm_ccn_pmu_cmp_mask_attr_7h.attr,
538 &arm_ccn_pmu_cmp_mask_attr_8l.attr, &arm_ccn_pmu_cmp_mask_attr_8h.attr,
539 &arm_ccn_pmu_cmp_mask_attr_9l.attr, &arm_ccn_pmu_cmp_mask_attr_9h.attr,
540 &arm_ccn_pmu_cmp_mask_attr_al.attr, &arm_ccn_pmu_cmp_mask_attr_ah.attr,
541 &arm_ccn_pmu_cmp_mask_attr_bl.attr, &arm_ccn_pmu_cmp_mask_attr_bh.attr,
542 NULL
543};
544
545static const struct attribute_group arm_ccn_pmu_cmp_mask_attr_group = {
546 .name = "cmp_mask",
547 .attrs = arm_ccn_pmu_cmp_mask_attrs,
548};
549
550static ssize_t arm_ccn_pmu_cpumask_show(struct device *dev,
551 struct device_attribute *attr, char *buf)
552{
553 struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));
554
555 return cpumap_print_to_pagebuf(true, buf, cpumask_of(ccn->dt.cpu));
556}
557
558static struct device_attribute arm_ccn_pmu_cpumask_attr =
559 __ATTR(cpumask, S_IRUGO, arm_ccn_pmu_cpumask_show, NULL);
560
561static struct attribute *arm_ccn_pmu_cpumask_attrs[] = {
562 &arm_ccn_pmu_cpumask_attr.attr,
563 NULL,
564};
565
566static const struct attribute_group arm_ccn_pmu_cpumask_attr_group = {
567 .attrs = arm_ccn_pmu_cpumask_attrs,
568};
569
570/*
571 * Default poll period is 10ms, which is way over the top anyway,
572 * as in the worst case scenario (an event every cycle), with 1GHz
573 * clocked bus, the smallest, 32 bit counter will overflow in
574 * more than 4s.
575 */
576static unsigned int arm_ccn_pmu_poll_period_us = 10000;
577module_param_named(pmu_poll_period_us, arm_ccn_pmu_poll_period_us, uint,
578 S_IRUGO | S_IWUSR);
579
580static ktime_t arm_ccn_pmu_timer_period(void)
581{
582 return ns_to_ktime((u64)arm_ccn_pmu_poll_period_us * 1000);
583}
584
585
586static const struct attribute_group *arm_ccn_pmu_attr_groups[] = {
587 &arm_ccn_pmu_events_attr_group,
588 &arm_ccn_pmu_format_attr_group,
589 &arm_ccn_pmu_cmp_mask_attr_group,
590 &arm_ccn_pmu_cpumask_attr_group,
591 NULL
592};
593
594
595static int arm_ccn_pmu_alloc_bit(unsigned long *bitmap, unsigned long size)
596{
597 int bit;
598
599 do {
600 bit = find_first_zero_bit(bitmap, size);
601 if (bit >= size)
602 return -EAGAIN;
603 } while (test_and_set_bit(bit, bitmap));
604
605 return bit;
606}
607
608/* All RN-I and RN-D nodes have identical PMUs */
609static int arm_ccn_pmu_type_eq(u32 a, u32 b)
610{
611 if (a == b)
612 return 1;
613
614 switch (a) {
615 case CCN_TYPE_RNI_1P:
616 case CCN_TYPE_RNI_2P:
617 case CCN_TYPE_RNI_3P:
618 case CCN_TYPE_RND_1P:
619 case CCN_TYPE_RND_2P:
620 case CCN_TYPE_RND_3P:
621 switch (b) {
622 case CCN_TYPE_RNI_1P:
623 case CCN_TYPE_RNI_2P:
624 case CCN_TYPE_RNI_3P:
625 case CCN_TYPE_RND_1P:
626 case CCN_TYPE_RND_2P:
627 case CCN_TYPE_RND_3P:
628 return 1;
629 }
630 break;
631 }
632
633 return 0;
634}
635
636static int arm_ccn_pmu_event_alloc(struct perf_event *event)
637{
638 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
639 struct hw_perf_event *hw = &event->hw;
640 u32 node_xp, type, event_id;
641 struct arm_ccn_component *source;
642 int bit;
643
644 node_xp = CCN_CONFIG_NODE(event->attr.config);
645 type = CCN_CONFIG_TYPE(event->attr.config);
646 event_id = CCN_CONFIG_EVENT(event->attr.config);
647
648 /* Allocate the cycle counter */
649 if (type == CCN_TYPE_CYCLES) {
650 if (test_and_set_bit(CCN_IDX_PMU_CYCLE_COUNTER,
651 ccn->dt.pmu_counters_mask))
652 return -EAGAIN;
653
654 hw->idx = CCN_IDX_PMU_CYCLE_COUNTER;
655 ccn->dt.pmu_counters[CCN_IDX_PMU_CYCLE_COUNTER].event = event;
656
657 return 0;
658 }
659
660 /* Allocate an event counter */
661 hw->idx = arm_ccn_pmu_alloc_bit(ccn->dt.pmu_counters_mask,
662 CCN_NUM_PMU_EVENT_COUNTERS);
663 if (hw->idx < 0) {
664 dev_dbg(ccn->dev, "No more counters available!\n");
665 return -EAGAIN;
666 }
667
668 if (type == CCN_TYPE_XP)
669 source = &ccn->xp[node_xp];
670 else
671 source = &ccn->node[node_xp];
672 ccn->dt.pmu_counters[hw->idx].source = source;
673
674 /* Allocate an event source or a watchpoint */
675 if (type == CCN_TYPE_XP && event_id == CCN_EVENT_WATCHPOINT)
676 bit = arm_ccn_pmu_alloc_bit(source->xp.dt_cmp_mask,
677 CCN_NUM_XP_WATCHPOINTS);
678 else
679 bit = arm_ccn_pmu_alloc_bit(source->pmu_events_mask,
680 CCN_NUM_PMU_EVENTS);
681 if (bit < 0) {
682 dev_dbg(ccn->dev, "No more event sources/watchpoints on node/XP %d!\n",
683 node_xp);
684 clear_bit(hw->idx, ccn->dt.pmu_counters_mask);
685 return -EAGAIN;
686 }
687 hw->config_base = bit;
688
689 ccn->dt.pmu_counters[hw->idx].event = event;
690
691 return 0;
692}
693
694static void arm_ccn_pmu_event_release(struct perf_event *event)
695{
696 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
697 struct hw_perf_event *hw = &event->hw;
698
699 if (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER) {
700 clear_bit(CCN_IDX_PMU_CYCLE_COUNTER, ccn->dt.pmu_counters_mask);
701 } else {
702 struct arm_ccn_component *source =
703 ccn->dt.pmu_counters[hw->idx].source;
704
705 if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP &&
706 CCN_CONFIG_EVENT(event->attr.config) ==
707 CCN_EVENT_WATCHPOINT)
708 clear_bit(hw->config_base, source->xp.dt_cmp_mask);
709 else
710 clear_bit(hw->config_base, source->pmu_events_mask);
711 clear_bit(hw->idx, ccn->dt.pmu_counters_mask);
712 }
713
714 ccn->dt.pmu_counters[hw->idx].source = NULL;
715 ccn->dt.pmu_counters[hw->idx].event = NULL;
716}
717
718static int arm_ccn_pmu_event_init(struct perf_event *event)
719{
720 struct arm_ccn *ccn;
721 struct hw_perf_event *hw = &event->hw;
722 u32 node_xp, type, event_id;
723 int valid;
724 int i;
725 struct perf_event *sibling;
726
727 if (event->attr.type != event->pmu->type)
728 return -ENOENT;
729
730 ccn = pmu_to_arm_ccn(event->pmu);
731
732 if (hw->sample_period) {
733 dev_dbg(ccn->dev, "Sampling not supported!\n");
734 return -EOPNOTSUPP;
735 }
736
737 if (has_branch_stack(event)) {
738 dev_dbg(ccn->dev, "Can't exclude execution levels!\n");
739 return -EINVAL;
740 }
741
742 if (event->cpu < 0) {
743 dev_dbg(ccn->dev, "Can't provide per-task data!\n");
744 return -EOPNOTSUPP;
745 }
746 /*
747 * Many perf core operations (eg. events rotation) operate on a
748 * single CPU context. This is obvious for CPU PMUs, where one
749 * expects the same sets of events being observed on all CPUs,
750 * but can lead to issues for off-core PMUs, like CCN, where each
751 * event could be theoretically assigned to a different CPU. To
752 * mitigate this, we enforce CPU assignment to one, selected
753 * processor (the one described in the "cpumask" attribute).
754 */
755 event->cpu = ccn->dt.cpu;
756
757 node_xp = CCN_CONFIG_NODE(event->attr.config);
758 type = CCN_CONFIG_TYPE(event->attr.config);
759 event_id = CCN_CONFIG_EVENT(event->attr.config);
760
761 /* Validate node/xp vs topology */
762 switch (type) {
763 case CCN_TYPE_MN:
764 if (node_xp != ccn->mn_id) {
765 dev_dbg(ccn->dev, "Invalid MN ID %d!\n", node_xp);
766 return -EINVAL;
767 }
768 break;
769 case CCN_TYPE_XP:
770 if (node_xp >= ccn->num_xps) {
771 dev_dbg(ccn->dev, "Invalid XP ID %d!\n", node_xp);
772 return -EINVAL;
773 }
774 break;
775 case CCN_TYPE_CYCLES:
776 break;
777 default:
778 if (node_xp >= ccn->num_nodes) {
779 dev_dbg(ccn->dev, "Invalid node ID %d!\n", node_xp);
780 return -EINVAL;
781 }
782 if (!arm_ccn_pmu_type_eq(type, ccn->node[node_xp].type)) {
783 dev_dbg(ccn->dev, "Invalid type 0x%x for node %d!\n",
784 type, node_xp);
785 return -EINVAL;
786 }
787 break;
788 }
789
790 /* Validate event ID vs available for the type */
791 for (i = 0, valid = 0; i < ARRAY_SIZE(arm_ccn_pmu_events) && !valid;
792 i++) {
793 struct arm_ccn_pmu_event *e = &arm_ccn_pmu_events[i];
794 u32 port = CCN_CONFIG_PORT(event->attr.config);
795 u32 vc = CCN_CONFIG_VC(event->attr.config);
796
797 if (!arm_ccn_pmu_type_eq(type, e->type))
798 continue;
799 if (event_id != e->event)
800 continue;
801 if (e->num_ports && port >= e->num_ports) {
802 dev_dbg(ccn->dev, "Invalid port %d for node/XP %d!\n",
803 port, node_xp);
804 return -EINVAL;
805 }
806 if (e->num_vcs && vc >= e->num_vcs) {
807 dev_dbg(ccn->dev, "Invalid vc %d for node/XP %d!\n",
808 vc, node_xp);
809 return -EINVAL;
810 }
811 valid = 1;
812 }
813 if (!valid) {
814 dev_dbg(ccn->dev, "Invalid event 0x%x for node/XP %d!\n",
815 event_id, node_xp);
816 return -EINVAL;
817 }
818
819 /* Watchpoint-based event for a node is actually set on XP */
820 if (event_id == CCN_EVENT_WATCHPOINT && type != CCN_TYPE_XP) {
821 u32 port;
822
823 type = CCN_TYPE_XP;
824 port = arm_ccn_node_to_xp_port(node_xp);
825 node_xp = arm_ccn_node_to_xp(node_xp);
826
827 arm_ccn_pmu_config_set(&event->attr.config,
828 node_xp, type, port);
829 }
830
831 /*
832 * We must NOT create groups containing mixed PMUs, although software
833 * events are acceptable (for example to create a CCN group
834 * periodically read when a hrtimer aka cpu-clock leader triggers).
835 */
836 if (event->group_leader->pmu != event->pmu &&
837 !is_software_event(event->group_leader))
838 return -EINVAL;
839
840 for_each_sibling_event(sibling, event->group_leader) {
841 if (sibling->pmu != event->pmu &&
842 !is_software_event(sibling))
843 return -EINVAL;
844 }
845
846 return 0;
847}
848
849static u64 arm_ccn_pmu_read_counter(struct arm_ccn *ccn, int idx)
850{
851 u64 res;
852
853 if (idx == CCN_IDX_PMU_CYCLE_COUNTER) {
854#ifdef readq
855 res = readq(ccn->dt.base + CCN_DT_PMCCNTR);
856#else
857 /* 40 bit counter, can do snapshot and read in two parts */
858 writel(0x1, ccn->dt.base + CCN_DT_PMSR_REQ);
859 while (!(readl(ccn->dt.base + CCN_DT_PMSR) & 0x1))
860 ;
861 writel(0x1, ccn->dt.base + CCN_DT_PMSR_CLR);
862 res = readl(ccn->dt.base + CCN_DT_PMCCNTRSR + 4) & 0xff;
863 res <<= 32;
864 res |= readl(ccn->dt.base + CCN_DT_PMCCNTRSR);
865#endif
866 } else {
867 res = readl(ccn->dt.base + CCN_DT_PMEVCNT(idx));
868 }
869
870 return res;
871}
872
873static void arm_ccn_pmu_event_update(struct perf_event *event)
874{
875 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
876 struct hw_perf_event *hw = &event->hw;
877 u64 prev_count, new_count, mask;
878
879 do {
880 prev_count = local64_read(&hw->prev_count);
881 new_count = arm_ccn_pmu_read_counter(ccn, hw->idx);
882 } while (local64_xchg(&hw->prev_count, new_count) != prev_count);
883
884 mask = (1LLU << (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER ? 40 : 32)) - 1;
885
886 local64_add((new_count - prev_count) & mask, &event->count);
887}
888
889static void arm_ccn_pmu_xp_dt_config(struct perf_event *event, int enable)
890{
891 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
892 struct hw_perf_event *hw = &event->hw;
893 struct arm_ccn_component *xp;
894 u32 val, dt_cfg;
895
896 /* Nothing to do for cycle counter */
897 if (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER)
898 return;
899
900 if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP)
901 xp = &ccn->xp[CCN_CONFIG_XP(event->attr.config)];
902 else
903 xp = &ccn->xp[arm_ccn_node_to_xp(
904 CCN_CONFIG_NODE(event->attr.config))];
905
906 if (enable)
907 dt_cfg = hw->event_base;
908 else
909 dt_cfg = CCN_XP_DT_CONFIG__DT_CFG__PASS_THROUGH;
910
911 spin_lock(&ccn->dt.config_lock);
912
913 val = readl(xp->base + CCN_XP_DT_CONFIG);
914 val &= ~(CCN_XP_DT_CONFIG__DT_CFG__MASK <<
915 CCN_XP_DT_CONFIG__DT_CFG__SHIFT(hw->idx));
916 val |= dt_cfg << CCN_XP_DT_CONFIG__DT_CFG__SHIFT(hw->idx);
917 writel(val, xp->base + CCN_XP_DT_CONFIG);
918
919 spin_unlock(&ccn->dt.config_lock);
920}
921
922static void arm_ccn_pmu_event_start(struct perf_event *event, int flags)
923{
924 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
925 struct hw_perf_event *hw = &event->hw;
926
927 local64_set(&event->hw.prev_count,
928 arm_ccn_pmu_read_counter(ccn, hw->idx));
929 hw->state = 0;
930
931 /* Set the DT bus input, engaging the counter */
932 arm_ccn_pmu_xp_dt_config(event, 1);
933}
934
935static void arm_ccn_pmu_event_stop(struct perf_event *event, int flags)
936{
937 struct hw_perf_event *hw = &event->hw;
938
939 /* Disable counting, setting the DT bus to pass-through mode */
940 arm_ccn_pmu_xp_dt_config(event, 0);
941
942 if (flags & PERF_EF_UPDATE)
943 arm_ccn_pmu_event_update(event);
944
945 hw->state |= PERF_HES_STOPPED;
946}
947
948static void arm_ccn_pmu_xp_watchpoint_config(struct perf_event *event)
949{
950 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
951 struct hw_perf_event *hw = &event->hw;
952 struct arm_ccn_component *source =
953 ccn->dt.pmu_counters[hw->idx].source;
954 unsigned long wp = hw->config_base;
955 u32 val;
956 u64 cmp_l = event->attr.config1;
957 u64 cmp_h = event->attr.config2;
958 u64 mask_l = ccn->dt.cmp_mask[CCN_CONFIG_MASK(event->attr.config)].l;
959 u64 mask_h = ccn->dt.cmp_mask[CCN_CONFIG_MASK(event->attr.config)].h;
960
961 hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT(wp);
962
963 /* Direction (RX/TX), device (port) & virtual channel */
964 val = readl(source->base + CCN_XP_DT_INTERFACE_SEL);
965 val &= ~(CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__MASK <<
966 CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__SHIFT(wp));
967 val |= CCN_CONFIG_DIR(event->attr.config) <<
968 CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__SHIFT(wp);
969 val &= ~(CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__MASK <<
970 CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__SHIFT(wp));
971 val |= CCN_CONFIG_PORT(event->attr.config) <<
972 CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__SHIFT(wp);
973 val &= ~(CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__MASK <<
974 CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__SHIFT(wp));
975 val |= CCN_CONFIG_VC(event->attr.config) <<
976 CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__SHIFT(wp);
977 writel(val, source->base + CCN_XP_DT_INTERFACE_SEL);
978
979 /* Comparison values */
980 writel(cmp_l & 0xffffffff, source->base + CCN_XP_DT_CMP_VAL_L(wp));
981 writel((cmp_l >> 32) & 0x7fffffff,
982 source->base + CCN_XP_DT_CMP_VAL_L(wp) + 4);
983 writel(cmp_h & 0xffffffff, source->base + CCN_XP_DT_CMP_VAL_H(wp));
984 writel((cmp_h >> 32) & 0x0fffffff,
985 source->base + CCN_XP_DT_CMP_VAL_H(wp) + 4);
986
987 /* Mask */
988 writel(mask_l & 0xffffffff, source->base + CCN_XP_DT_CMP_MASK_L(wp));
989 writel((mask_l >> 32) & 0x7fffffff,
990 source->base + CCN_XP_DT_CMP_MASK_L(wp) + 4);
991 writel(mask_h & 0xffffffff, source->base + CCN_XP_DT_CMP_MASK_H(wp));
992 writel((mask_h >> 32) & 0x0fffffff,
993 source->base + CCN_XP_DT_CMP_MASK_H(wp) + 4);
994}
995
996static void arm_ccn_pmu_xp_event_config(struct perf_event *event)
997{
998 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
999 struct hw_perf_event *hw = &event->hw;
1000 struct arm_ccn_component *source =
1001 ccn->dt.pmu_counters[hw->idx].source;
1002 u32 val, id;
1003
1004 hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__XP_PMU_EVENT(hw->config_base);
1005
1006 id = (CCN_CONFIG_VC(event->attr.config) << 4) |
1007 (CCN_CONFIG_BUS(event->attr.config) << 3) |
1008 (CCN_CONFIG_EVENT(event->attr.config) << 0);
1009
1010 val = readl(source->base + CCN_XP_PMU_EVENT_SEL);
1011 val &= ~(CCN_XP_PMU_EVENT_SEL__ID__MASK <<
1012 CCN_XP_PMU_EVENT_SEL__ID__SHIFT(hw->config_base));
1013 val |= id << CCN_XP_PMU_EVENT_SEL__ID__SHIFT(hw->config_base);
1014 writel(val, source->base + CCN_XP_PMU_EVENT_SEL);
1015}
1016
1017static void arm_ccn_pmu_node_event_config(struct perf_event *event)
1018{
1019 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
1020 struct hw_perf_event *hw = &event->hw;
1021 struct arm_ccn_component *source =
1022 ccn->dt.pmu_counters[hw->idx].source;
1023 u32 type = CCN_CONFIG_TYPE(event->attr.config);
1024 u32 val, port;
1025
1026 port = arm_ccn_node_to_xp_port(CCN_CONFIG_NODE(event->attr.config));
1027 hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__DEVICE_PMU_EVENT(port,
1028 hw->config_base);
1029
1030 /* These *_event_sel regs should be identical, but let's make sure... */
1031 BUILD_BUG_ON(CCN_HNF_PMU_EVENT_SEL != CCN_SBAS_PMU_EVENT_SEL);
1032 BUILD_BUG_ON(CCN_SBAS_PMU_EVENT_SEL != CCN_RNI_PMU_EVENT_SEL);
1033 BUILD_BUG_ON(CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(1) !=
1034 CCN_SBAS_PMU_EVENT_SEL__ID__SHIFT(1));
1035 BUILD_BUG_ON(CCN_SBAS_PMU_EVENT_SEL__ID__SHIFT(1) !=
1036 CCN_RNI_PMU_EVENT_SEL__ID__SHIFT(1));
1037 BUILD_BUG_ON(CCN_HNF_PMU_EVENT_SEL__ID__MASK !=
1038 CCN_SBAS_PMU_EVENT_SEL__ID__MASK);
1039 BUILD_BUG_ON(CCN_SBAS_PMU_EVENT_SEL__ID__MASK !=
1040 CCN_RNI_PMU_EVENT_SEL__ID__MASK);
1041 if (WARN_ON(type != CCN_TYPE_HNF && type != CCN_TYPE_SBAS &&
1042 !arm_ccn_pmu_type_eq(type, CCN_TYPE_RNI_3P)))
1043 return;
1044
1045 /* Set the event id for the pre-allocated counter */
1046 val = readl(source->base + CCN_HNF_PMU_EVENT_SEL);
1047 val &= ~(CCN_HNF_PMU_EVENT_SEL__ID__MASK <<
1048 CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(hw->config_base));
1049 val |= CCN_CONFIG_EVENT(event->attr.config) <<
1050 CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(hw->config_base);
1051 writel(val, source->base + CCN_HNF_PMU_EVENT_SEL);
1052}
1053
1054static void arm_ccn_pmu_event_config(struct perf_event *event)
1055{
1056 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
1057 struct hw_perf_event *hw = &event->hw;
1058 u32 xp, offset, val;
1059
1060 /* Cycle counter requires no setup */
1061 if (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER)
1062 return;
1063
1064 if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP)
1065 xp = CCN_CONFIG_XP(event->attr.config);
1066 else
1067 xp = arm_ccn_node_to_xp(CCN_CONFIG_NODE(event->attr.config));
1068
1069 spin_lock(&ccn->dt.config_lock);
1070
1071 /* Set the DT bus "distance" register */
1072 offset = (hw->idx / 4) * 4;
1073 val = readl(ccn->dt.base + CCN_DT_ACTIVE_DSM + offset);
1074 val &= ~(CCN_DT_ACTIVE_DSM__DSM_ID__MASK <<
1075 CCN_DT_ACTIVE_DSM__DSM_ID__SHIFT(hw->idx % 4));
1076 val |= xp << CCN_DT_ACTIVE_DSM__DSM_ID__SHIFT(hw->idx % 4);
1077 writel(val, ccn->dt.base + CCN_DT_ACTIVE_DSM + offset);
1078
1079 if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP) {
1080 if (CCN_CONFIG_EVENT(event->attr.config) ==
1081 CCN_EVENT_WATCHPOINT)
1082 arm_ccn_pmu_xp_watchpoint_config(event);
1083 else
1084 arm_ccn_pmu_xp_event_config(event);
1085 } else {
1086 arm_ccn_pmu_node_event_config(event);
1087 }
1088
1089 spin_unlock(&ccn->dt.config_lock);
1090}
1091
1092static int arm_ccn_pmu_active_counters(struct arm_ccn *ccn)
1093{
1094 return bitmap_weight(ccn->dt.pmu_counters_mask,
1095 CCN_NUM_PMU_EVENT_COUNTERS + 1);
1096}
1097
1098static int arm_ccn_pmu_event_add(struct perf_event *event, int flags)
1099{
1100 int err;
1101 struct hw_perf_event *hw = &event->hw;
1102 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
1103
1104 err = arm_ccn_pmu_event_alloc(event);
1105 if (err)
1106 return err;
1107
1108 /*
1109 * Pin the timer, so that the overflows are handled by the chosen
1110 * event->cpu (this is the same one as presented in "cpumask"
1111 * attribute).
1112 */
1113 if (!ccn->irq && arm_ccn_pmu_active_counters(ccn) == 1)
1114 hrtimer_start(&ccn->dt.hrtimer, arm_ccn_pmu_timer_period(),
1115 HRTIMER_MODE_REL_PINNED);
1116
1117 arm_ccn_pmu_event_config(event);
1118
1119 hw->state = PERF_HES_STOPPED;
1120
1121 if (flags & PERF_EF_START)
1122 arm_ccn_pmu_event_start(event, PERF_EF_UPDATE);
1123
1124 return 0;
1125}
1126
1127static void arm_ccn_pmu_event_del(struct perf_event *event, int flags)
1128{
1129 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
1130
1131 arm_ccn_pmu_event_stop(event, PERF_EF_UPDATE);
1132
1133 arm_ccn_pmu_event_release(event);
1134
1135 if (!ccn->irq && arm_ccn_pmu_active_counters(ccn) == 0)
1136 hrtimer_cancel(&ccn->dt.hrtimer);
1137}
1138
1139static void arm_ccn_pmu_event_read(struct perf_event *event)
1140{
1141 arm_ccn_pmu_event_update(event);
1142}
1143
1144static void arm_ccn_pmu_enable(struct pmu *pmu)
1145{
1146 struct arm_ccn *ccn = pmu_to_arm_ccn(pmu);
1147
1148 u32 val = readl(ccn->dt.base + CCN_DT_PMCR);
1149 val |= CCN_DT_PMCR__PMU_EN;
1150 writel(val, ccn->dt.base + CCN_DT_PMCR);
1151}
1152
1153static void arm_ccn_pmu_disable(struct pmu *pmu)
1154{
1155 struct arm_ccn *ccn = pmu_to_arm_ccn(pmu);
1156
1157 u32 val = readl(ccn->dt.base + CCN_DT_PMCR);
1158 val &= ~CCN_DT_PMCR__PMU_EN;
1159 writel(val, ccn->dt.base + CCN_DT_PMCR);
1160}
1161
1162static irqreturn_t arm_ccn_pmu_overflow_handler(struct arm_ccn_dt *dt)
1163{
1164 u32 pmovsr = readl(dt->base + CCN_DT_PMOVSR);
1165 int idx;
1166
1167 if (!pmovsr)
1168 return IRQ_NONE;
1169
1170 writel(pmovsr, dt->base + CCN_DT_PMOVSR_CLR);
1171
1172 BUILD_BUG_ON(CCN_IDX_PMU_CYCLE_COUNTER != CCN_NUM_PMU_EVENT_COUNTERS);
1173
1174 for (idx = 0; idx < CCN_NUM_PMU_EVENT_COUNTERS + 1; idx++) {
1175 struct perf_event *event = dt->pmu_counters[idx].event;
1176 int overflowed = pmovsr & BIT(idx);
1177
1178 WARN_ON_ONCE(overflowed && !event &&
1179 idx != CCN_IDX_PMU_CYCLE_COUNTER);
1180
1181 if (!event || !overflowed)
1182 continue;
1183
1184 arm_ccn_pmu_event_update(event);
1185 }
1186
1187 return IRQ_HANDLED;
1188}
1189
1190static enum hrtimer_restart arm_ccn_pmu_timer_handler(struct hrtimer *hrtimer)
1191{
1192 struct arm_ccn_dt *dt = container_of(hrtimer, struct arm_ccn_dt,
1193 hrtimer);
1194 unsigned long flags;
1195
1196 local_irq_save(flags);
1197 arm_ccn_pmu_overflow_handler(dt);
1198 local_irq_restore(flags);
1199
1200 hrtimer_forward_now(hrtimer, arm_ccn_pmu_timer_period());
1201 return HRTIMER_RESTART;
1202}
1203
1204
1205static int arm_ccn_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
1206{
1207 struct arm_ccn_dt *dt = hlist_entry_safe(node, struct arm_ccn_dt, node);
1208 struct arm_ccn *ccn = container_of(dt, struct arm_ccn, dt);
1209 unsigned int target;
1210
1211 if (cpu != dt->cpu)
1212 return 0;
1213 target = cpumask_any_but(cpu_online_mask, cpu);
1214 if (target >= nr_cpu_ids)
1215 return 0;
1216 perf_pmu_migrate_context(&dt->pmu, cpu, target);
1217 dt->cpu = target;
1218 if (ccn->irq)
1219 WARN_ON(irq_set_affinity_hint(ccn->irq, cpumask_of(dt->cpu)));
1220 return 0;
1221}
1222
1223static DEFINE_IDA(arm_ccn_pmu_ida);
1224
1225static int arm_ccn_pmu_init(struct arm_ccn *ccn)
1226{
1227 int i;
1228 char *name;
1229 int err;
1230
1231 /* Initialize DT subsystem */
1232 ccn->dt.base = ccn->base + CCN_REGION_SIZE;
1233 spin_lock_init(&ccn->dt.config_lock);
1234 writel(CCN_DT_PMOVSR_CLR__MASK, ccn->dt.base + CCN_DT_PMOVSR_CLR);
1235 writel(CCN_DT_CTL__DT_EN, ccn->dt.base + CCN_DT_CTL);
1236 writel(CCN_DT_PMCR__OVFL_INTR_EN | CCN_DT_PMCR__PMU_EN,
1237 ccn->dt.base + CCN_DT_PMCR);
1238 writel(0x1, ccn->dt.base + CCN_DT_PMSR_CLR);
1239 for (i = 0; i < ccn->num_xps; i++) {
1240 writel(0, ccn->xp[i].base + CCN_XP_DT_CONFIG);
1241 writel((CCN_XP_DT_CONTROL__WP_ARM_SEL__ALWAYS <<
1242 CCN_XP_DT_CONTROL__WP_ARM_SEL__SHIFT(0)) |
1243 (CCN_XP_DT_CONTROL__WP_ARM_SEL__ALWAYS <<
1244 CCN_XP_DT_CONTROL__WP_ARM_SEL__SHIFT(1)) |
1245 CCN_XP_DT_CONTROL__DT_ENABLE,
1246 ccn->xp[i].base + CCN_XP_DT_CONTROL);
1247 }
1248 ccn->dt.cmp_mask[CCN_IDX_MASK_ANY].l = ~0;
1249 ccn->dt.cmp_mask[CCN_IDX_MASK_ANY].h = ~0;
1250 ccn->dt.cmp_mask[CCN_IDX_MASK_EXACT].l = 0;
1251 ccn->dt.cmp_mask[CCN_IDX_MASK_EXACT].h = 0;
1252 ccn->dt.cmp_mask[CCN_IDX_MASK_ORDER].l = ~0;
1253 ccn->dt.cmp_mask[CCN_IDX_MASK_ORDER].h = ~(0x1 << 15);
1254 ccn->dt.cmp_mask[CCN_IDX_MASK_OPCODE].l = ~0;
1255 ccn->dt.cmp_mask[CCN_IDX_MASK_OPCODE].h = ~(0x1f << 9);
1256
1257 /* Get a convenient /sys/event_source/devices/ name */
1258 ccn->dt.id = ida_simple_get(&arm_ccn_pmu_ida, 0, 0, GFP_KERNEL);
1259 if (ccn->dt.id == 0) {
1260 name = "ccn";
1261 } else {
1262 name = devm_kasprintf(ccn->dev, GFP_KERNEL, "ccn_%d",
1263 ccn->dt.id);
1264 if (!name) {
1265 err = -ENOMEM;
1266 goto error_choose_name;
1267 }
1268 }
1269
1270 /* Perf driver registration */
1271 ccn->dt.pmu = (struct pmu) {
1272 .module = THIS_MODULE,
1273 .attr_groups = arm_ccn_pmu_attr_groups,
1274 .task_ctx_nr = perf_invalid_context,
1275 .event_init = arm_ccn_pmu_event_init,
1276 .add = arm_ccn_pmu_event_add,
1277 .del = arm_ccn_pmu_event_del,
1278 .start = arm_ccn_pmu_event_start,
1279 .stop = arm_ccn_pmu_event_stop,
1280 .read = arm_ccn_pmu_event_read,
1281 .pmu_enable = arm_ccn_pmu_enable,
1282 .pmu_disable = arm_ccn_pmu_disable,
1283 .capabilities = PERF_PMU_CAP_NO_EXCLUDE,
1284 };
1285
1286 /* No overflow interrupt? Have to use a timer instead. */
1287 if (!ccn->irq) {
1288 dev_info(ccn->dev, "No access to interrupts, using timer.\n");
1289 hrtimer_init(&ccn->dt.hrtimer, CLOCK_MONOTONIC,
1290 HRTIMER_MODE_REL);
1291 ccn->dt.hrtimer.function = arm_ccn_pmu_timer_handler;
1292 }
1293
1294 /* Pick one CPU which we will use to collect data from CCN... */
1295 ccn->dt.cpu = raw_smp_processor_id();
1296
1297 /* Also make sure that the overflow interrupt is handled by this CPU */
1298 if (ccn->irq) {
1299 err = irq_set_affinity_hint(ccn->irq, cpumask_of(ccn->dt.cpu));
1300 if (err) {
1301 dev_err(ccn->dev, "Failed to set interrupt affinity!\n");
1302 goto error_set_affinity;
1303 }
1304 }
1305
1306 cpuhp_state_add_instance_nocalls(CPUHP_AP_PERF_ARM_CCN_ONLINE,
1307 &ccn->dt.node);
1308
1309 err = perf_pmu_register(&ccn->dt.pmu, name, -1);
1310 if (err)
1311 goto error_pmu_register;
1312
1313 return 0;
1314
1315error_pmu_register:
1316 cpuhp_state_remove_instance_nocalls(CPUHP_AP_PERF_ARM_CCN_ONLINE,
1317 &ccn->dt.node);
1318error_set_affinity:
1319error_choose_name:
1320 ida_simple_remove(&arm_ccn_pmu_ida, ccn->dt.id);
1321 for (i = 0; i < ccn->num_xps; i++)
1322 writel(0, ccn->xp[i].base + CCN_XP_DT_CONTROL);
1323 writel(0, ccn->dt.base + CCN_DT_PMCR);
1324 return err;
1325}
1326
1327static void arm_ccn_pmu_cleanup(struct arm_ccn *ccn)
1328{
1329 int i;
1330
1331 cpuhp_state_remove_instance_nocalls(CPUHP_AP_PERF_ARM_CCN_ONLINE,
1332 &ccn->dt.node);
1333 if (ccn->irq)
1334 irq_set_affinity_hint(ccn->irq, NULL);
1335 for (i = 0; i < ccn->num_xps; i++)
1336 writel(0, ccn->xp[i].base + CCN_XP_DT_CONTROL);
1337 writel(0, ccn->dt.base + CCN_DT_PMCR);
1338 perf_pmu_unregister(&ccn->dt.pmu);
1339 ida_simple_remove(&arm_ccn_pmu_ida, ccn->dt.id);
1340}
1341
1342static int arm_ccn_for_each_valid_region(struct arm_ccn *ccn,
1343 int (*callback)(struct arm_ccn *ccn, int region,
1344 void __iomem *base, u32 type, u32 id))
1345{
1346 int region;
1347
1348 for (region = 0; region < CCN_NUM_REGIONS; region++) {
1349 u32 val, type, id;
1350 void __iomem *base;
1351 int err;
1352
1353 val = readl(ccn->base + CCN_MN_OLY_COMP_LIST_63_0 +
1354 4 * (region / 32));
1355 if (!(val & (1 << (region % 32))))
1356 continue;
1357
1358 base = ccn->base + region * CCN_REGION_SIZE;
1359 val = readl(base + CCN_ALL_OLY_ID);
1360 type = (val >> CCN_ALL_OLY_ID__OLY_ID__SHIFT) &
1361 CCN_ALL_OLY_ID__OLY_ID__MASK;
1362 id = (val >> CCN_ALL_OLY_ID__NODE_ID__SHIFT) &
1363 CCN_ALL_OLY_ID__NODE_ID__MASK;
1364
1365 err = callback(ccn, region, base, type, id);
1366 if (err)
1367 return err;
1368 }
1369
1370 return 0;
1371}
1372
1373static int arm_ccn_get_nodes_num(struct arm_ccn *ccn, int region,
1374 void __iomem *base, u32 type, u32 id)
1375{
1376
1377 if (type == CCN_TYPE_XP && id >= ccn->num_xps)
1378 ccn->num_xps = id + 1;
1379 else if (id >= ccn->num_nodes)
1380 ccn->num_nodes = id + 1;
1381
1382 return 0;
1383}
1384
1385static int arm_ccn_init_nodes(struct arm_ccn *ccn, int region,
1386 void __iomem *base, u32 type, u32 id)
1387{
1388 struct arm_ccn_component *component;
1389
1390 dev_dbg(ccn->dev, "Region %d: id=%u, type=0x%02x\n", region, id, type);
1391
1392 switch (type) {
1393 case CCN_TYPE_MN:
1394 ccn->mn_id = id;
1395 return 0;
1396 case CCN_TYPE_DT:
1397 return 0;
1398 case CCN_TYPE_XP:
1399 component = &ccn->xp[id];
1400 break;
1401 case CCN_TYPE_SBSX:
1402 ccn->sbsx_present = 1;
1403 component = &ccn->node[id];
1404 break;
1405 case CCN_TYPE_SBAS:
1406 ccn->sbas_present = 1;
1407 fallthrough;
1408 default:
1409 component = &ccn->node[id];
1410 break;
1411 }
1412
1413 component->base = base;
1414 component->type = type;
1415
1416 return 0;
1417}
1418
1419
1420static irqreturn_t arm_ccn_error_handler(struct arm_ccn *ccn,
1421 const u32 *err_sig_val)
1422{
1423 /* This should be really handled by firmware... */
1424 dev_err(ccn->dev, "Error reported in %08x%08x%08x%08x%08x%08x.\n",
1425 err_sig_val[5], err_sig_val[4], err_sig_val[3],
1426 err_sig_val[2], err_sig_val[1], err_sig_val[0]);
1427 dev_err(ccn->dev, "Disabling interrupt generation for all errors.\n");
1428 writel(CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLE,
1429 ccn->base + CCN_MN_ERRINT_STATUS);
1430
1431 return IRQ_HANDLED;
1432}
1433
1434
1435static irqreturn_t arm_ccn_irq_handler(int irq, void *dev_id)
1436{
1437 irqreturn_t res = IRQ_NONE;
1438 struct arm_ccn *ccn = dev_id;
1439 u32 err_sig_val[6];
1440 u32 err_or;
1441 int i;
1442
1443 /* PMU overflow is a special case */
1444 err_or = err_sig_val[0] = readl(ccn->base + CCN_MN_ERR_SIG_VAL_63_0);
1445 if (err_or & CCN_MN_ERR_SIG_VAL_63_0__DT) {
1446 err_or &= ~CCN_MN_ERR_SIG_VAL_63_0__DT;
1447 res = arm_ccn_pmu_overflow_handler(&ccn->dt);
1448 }
1449
1450 /* Have to read all err_sig_vals to clear them */
1451 for (i = 1; i < ARRAY_SIZE(err_sig_val); i++) {
1452 err_sig_val[i] = readl(ccn->base +
1453 CCN_MN_ERR_SIG_VAL_63_0 + i * 4);
1454 err_or |= err_sig_val[i];
1455 }
1456 if (err_or)
1457 res |= arm_ccn_error_handler(ccn, err_sig_val);
1458
1459 if (res != IRQ_NONE)
1460 writel(CCN_MN_ERRINT_STATUS__INTREQ__DESSERT,
1461 ccn->base + CCN_MN_ERRINT_STATUS);
1462
1463 return res;
1464}
1465
1466
1467static int arm_ccn_probe(struct platform_device *pdev)
1468{
1469 struct arm_ccn *ccn;
1470 struct resource *res;
1471 unsigned int irq;
1472 int err;
1473
1474 ccn = devm_kzalloc(&pdev->dev, sizeof(*ccn), GFP_KERNEL);
1475 if (!ccn)
1476 return -ENOMEM;
1477 ccn->dev = &pdev->dev;
1478 platform_set_drvdata(pdev, ccn);
1479
1480 ccn->base = devm_platform_ioremap_resource(pdev, 0);
1481 if (IS_ERR(ccn->base))
1482 return PTR_ERR(ccn->base);
1483
1484 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1485 if (!res)
1486 return -EINVAL;
1487 irq = res->start;
1488
1489 /* Check if we can use the interrupt */
1490 writel(CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLE,
1491 ccn->base + CCN_MN_ERRINT_STATUS);
1492 if (readl(ccn->base + CCN_MN_ERRINT_STATUS) &
1493 CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLED) {
1494 /* Can set 'disable' bits, so can acknowledge interrupts */
1495 writel(CCN_MN_ERRINT_STATUS__PMU_EVENTS__ENABLE,
1496 ccn->base + CCN_MN_ERRINT_STATUS);
1497 err = devm_request_irq(ccn->dev, irq, arm_ccn_irq_handler,
1498 IRQF_NOBALANCING | IRQF_NO_THREAD,
1499 dev_name(ccn->dev), ccn);
1500 if (err)
1501 return err;
1502
1503 ccn->irq = irq;
1504 }
1505
1506
1507 /* Build topology */
1508
1509 err = arm_ccn_for_each_valid_region(ccn, arm_ccn_get_nodes_num);
1510 if (err)
1511 return err;
1512
1513 ccn->node = devm_kcalloc(ccn->dev, ccn->num_nodes, sizeof(*ccn->node),
1514 GFP_KERNEL);
1515 ccn->xp = devm_kcalloc(ccn->dev, ccn->num_xps, sizeof(*ccn->node),
1516 GFP_KERNEL);
1517 if (!ccn->node || !ccn->xp)
1518 return -ENOMEM;
1519
1520 err = arm_ccn_for_each_valid_region(ccn, arm_ccn_init_nodes);
1521 if (err)
1522 return err;
1523
1524 return arm_ccn_pmu_init(ccn);
1525}
1526
1527static int arm_ccn_remove(struct platform_device *pdev)
1528{
1529 struct arm_ccn *ccn = platform_get_drvdata(pdev);
1530
1531 arm_ccn_pmu_cleanup(ccn);
1532
1533 return 0;
1534}
1535
1536static const struct of_device_id arm_ccn_match[] = {
1537 { .compatible = "arm,ccn-502", },
1538 { .compatible = "arm,ccn-504", },
1539 { .compatible = "arm,ccn-512", },
1540 {},
1541};
1542MODULE_DEVICE_TABLE(of, arm_ccn_match);
1543
1544static struct platform_driver arm_ccn_driver = {
1545 .driver = {
1546 .name = "arm-ccn",
1547 .of_match_table = arm_ccn_match,
1548 .suppress_bind_attrs = true,
1549 },
1550 .probe = arm_ccn_probe,
1551 .remove = arm_ccn_remove,
1552};
1553
1554static int __init arm_ccn_init(void)
1555{
1556 int i, ret;
1557
1558 ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_CCN_ONLINE,
1559 "perf/arm/ccn:online", NULL,
1560 arm_ccn_pmu_offline_cpu);
1561 if (ret)
1562 return ret;
1563
1564 for (i = 0; i < ARRAY_SIZE(arm_ccn_pmu_events); i++)
1565 arm_ccn_pmu_events_attrs[i] = &arm_ccn_pmu_events[i].attr.attr;
1566
1567 ret = platform_driver_register(&arm_ccn_driver);
1568 if (ret)
1569 cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_CCN_ONLINE);
1570 return ret;
1571}
1572
1573static void __exit arm_ccn_exit(void)
1574{
1575 platform_driver_unregister(&arm_ccn_driver);
1576 cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_CCN_ONLINE);
1577}
1578
1579module_init(arm_ccn_init);
1580module_exit(arm_ccn_exit);
1581
1582MODULE_AUTHOR("Pawel Moll <pawel.moll@arm.com>");
1583MODULE_LICENSE("GPL v2");
1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License version 2 as
4 * published by the Free Software Foundation.
5 *
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
10 *
11 * Copyright (C) 2014 ARM Limited
12 */
13
14#include <linux/ctype.h>
15#include <linux/hrtimer.h>
16#include <linux/idr.h>
17#include <linux/interrupt.h>
18#include <linux/io.h>
19#include <linux/module.h>
20#include <linux/perf_event.h>
21#include <linux/platform_device.h>
22#include <linux/slab.h>
23
24#define CCN_NUM_XP_PORTS 2
25#define CCN_NUM_VCS 4
26#define CCN_NUM_REGIONS 256
27#define CCN_REGION_SIZE 0x10000
28
29#define CCN_ALL_OLY_ID 0xff00
30#define CCN_ALL_OLY_ID__OLY_ID__SHIFT 0
31#define CCN_ALL_OLY_ID__OLY_ID__MASK 0x1f
32#define CCN_ALL_OLY_ID__NODE_ID__SHIFT 8
33#define CCN_ALL_OLY_ID__NODE_ID__MASK 0x3f
34
35#define CCN_MN_ERRINT_STATUS 0x0008
36#define CCN_MN_ERRINT_STATUS__INTREQ__DESSERT 0x11
37#define CCN_MN_ERRINT_STATUS__ALL_ERRORS__ENABLE 0x02
38#define CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLED 0x20
39#define CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLE 0x22
40#define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_ENABLE 0x04
41#define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_DISABLED 0x40
42#define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_DISABLE 0x44
43#define CCN_MN_ERRINT_STATUS__PMU_EVENTS__ENABLE 0x08
44#define CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLED 0x80
45#define CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLE 0x88
46#define CCN_MN_OLY_COMP_LIST_63_0 0x01e0
47#define CCN_MN_ERR_SIG_VAL_63_0 0x0300
48#define CCN_MN_ERR_SIG_VAL_63_0__DT (1 << 1)
49
50#define CCN_DT_ACTIVE_DSM 0x0000
51#define CCN_DT_ACTIVE_DSM__DSM_ID__SHIFT(n) ((n) * 8)
52#define CCN_DT_ACTIVE_DSM__DSM_ID__MASK 0xff
53#define CCN_DT_CTL 0x0028
54#define CCN_DT_CTL__DT_EN (1 << 0)
55#define CCN_DT_PMEVCNT(n) (0x0100 + (n) * 0x8)
56#define CCN_DT_PMCCNTR 0x0140
57#define CCN_DT_PMCCNTRSR 0x0190
58#define CCN_DT_PMOVSR 0x0198
59#define CCN_DT_PMOVSR_CLR 0x01a0
60#define CCN_DT_PMOVSR_CLR__MASK 0x1f
61#define CCN_DT_PMCR 0x01a8
62#define CCN_DT_PMCR__OVFL_INTR_EN (1 << 6)
63#define CCN_DT_PMCR__PMU_EN (1 << 0)
64#define CCN_DT_PMSR 0x01b0
65#define CCN_DT_PMSR_REQ 0x01b8
66#define CCN_DT_PMSR_CLR 0x01c0
67
68#define CCN_HNF_PMU_EVENT_SEL 0x0600
69#define CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4)
70#define CCN_HNF_PMU_EVENT_SEL__ID__MASK 0xf
71
72#define CCN_XP_DT_CONFIG 0x0300
73#define CCN_XP_DT_CONFIG__DT_CFG__SHIFT(n) ((n) * 4)
74#define CCN_XP_DT_CONFIG__DT_CFG__MASK 0xf
75#define CCN_XP_DT_CONFIG__DT_CFG__PASS_THROUGH 0x0
76#define CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT_0_OR_1 0x1
77#define CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT(n) (0x2 + (n))
78#define CCN_XP_DT_CONFIG__DT_CFG__XP_PMU_EVENT(n) (0x4 + (n))
79#define CCN_XP_DT_CONFIG__DT_CFG__DEVICE_PMU_EVENT(d, n) (0x8 + (d) * 4 + (n))
80#define CCN_XP_DT_INTERFACE_SEL 0x0308
81#define CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__SHIFT(n) (0 + (n) * 8)
82#define CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__MASK 0x1
83#define CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__SHIFT(n) (1 + (n) * 8)
84#define CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__MASK 0x1
85#define CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__SHIFT(n) (2 + (n) * 8)
86#define CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__MASK 0x3
87#define CCN_XP_DT_CMP_VAL_L(n) (0x0310 + (n) * 0x40)
88#define CCN_XP_DT_CMP_VAL_H(n) (0x0318 + (n) * 0x40)
89#define CCN_XP_DT_CMP_MASK_L(n) (0x0320 + (n) * 0x40)
90#define CCN_XP_DT_CMP_MASK_H(n) (0x0328 + (n) * 0x40)
91#define CCN_XP_DT_CONTROL 0x0370
92#define CCN_XP_DT_CONTROL__DT_ENABLE (1 << 0)
93#define CCN_XP_DT_CONTROL__WP_ARM_SEL__SHIFT(n) (12 + (n) * 4)
94#define CCN_XP_DT_CONTROL__WP_ARM_SEL__MASK 0xf
95#define CCN_XP_DT_CONTROL__WP_ARM_SEL__ALWAYS 0xf
96#define CCN_XP_PMU_EVENT_SEL 0x0600
97#define CCN_XP_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 7)
98#define CCN_XP_PMU_EVENT_SEL__ID__MASK 0x3f
99
100#define CCN_SBAS_PMU_EVENT_SEL 0x0600
101#define CCN_SBAS_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4)
102#define CCN_SBAS_PMU_EVENT_SEL__ID__MASK 0xf
103
104#define CCN_RNI_PMU_EVENT_SEL 0x0600
105#define CCN_RNI_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4)
106#define CCN_RNI_PMU_EVENT_SEL__ID__MASK 0xf
107
108#define CCN_TYPE_MN 0x01
109#define CCN_TYPE_DT 0x02
110#define CCN_TYPE_HNF 0x04
111#define CCN_TYPE_HNI 0x05
112#define CCN_TYPE_XP 0x08
113#define CCN_TYPE_SBSX 0x0c
114#define CCN_TYPE_SBAS 0x10
115#define CCN_TYPE_RNI_1P 0x14
116#define CCN_TYPE_RNI_2P 0x15
117#define CCN_TYPE_RNI_3P 0x16
118#define CCN_TYPE_RND_1P 0x18 /* RN-D = RN-I + DVM */
119#define CCN_TYPE_RND_2P 0x19
120#define CCN_TYPE_RND_3P 0x1a
121#define CCN_TYPE_CYCLES 0xff /* Pseudotype */
122
123#define CCN_EVENT_WATCHPOINT 0xfe /* Pseudoevent */
124
125#define CCN_NUM_PMU_EVENTS 4
126#define CCN_NUM_XP_WATCHPOINTS 2 /* See DT.dbg_id.num_watchpoints */
127#define CCN_NUM_PMU_EVENT_COUNTERS 8 /* See DT.dbg_id.num_pmucntr */
128#define CCN_IDX_PMU_CYCLE_COUNTER CCN_NUM_PMU_EVENT_COUNTERS
129
130#define CCN_NUM_PREDEFINED_MASKS 4
131#define CCN_IDX_MASK_ANY (CCN_NUM_PMU_EVENT_COUNTERS + 0)
132#define CCN_IDX_MASK_EXACT (CCN_NUM_PMU_EVENT_COUNTERS + 1)
133#define CCN_IDX_MASK_ORDER (CCN_NUM_PMU_EVENT_COUNTERS + 2)
134#define CCN_IDX_MASK_OPCODE (CCN_NUM_PMU_EVENT_COUNTERS + 3)
135
136struct arm_ccn_component {
137 void __iomem *base;
138 u32 type;
139
140 DECLARE_BITMAP(pmu_events_mask, CCN_NUM_PMU_EVENTS);
141 union {
142 struct {
143 DECLARE_BITMAP(dt_cmp_mask, CCN_NUM_XP_WATCHPOINTS);
144 } xp;
145 };
146};
147
148#define pmu_to_arm_ccn(_pmu) container_of(container_of(_pmu, \
149 struct arm_ccn_dt, pmu), struct arm_ccn, dt)
150
151struct arm_ccn_dt {
152 int id;
153 void __iomem *base;
154
155 spinlock_t config_lock;
156
157 DECLARE_BITMAP(pmu_counters_mask, CCN_NUM_PMU_EVENT_COUNTERS + 1);
158 struct {
159 struct arm_ccn_component *source;
160 struct perf_event *event;
161 } pmu_counters[CCN_NUM_PMU_EVENT_COUNTERS + 1];
162
163 struct {
164 u64 l, h;
165 } cmp_mask[CCN_NUM_PMU_EVENT_COUNTERS + CCN_NUM_PREDEFINED_MASKS];
166
167 struct hrtimer hrtimer;
168
169 cpumask_t cpu;
170 struct hlist_node node;
171
172 struct pmu pmu;
173};
174
175struct arm_ccn {
176 struct device *dev;
177 void __iomem *base;
178 unsigned int irq;
179
180 unsigned sbas_present:1;
181 unsigned sbsx_present:1;
182
183 int num_nodes;
184 struct arm_ccn_component *node;
185
186 int num_xps;
187 struct arm_ccn_component *xp;
188
189 struct arm_ccn_dt dt;
190 int mn_id;
191};
192
193static int arm_ccn_node_to_xp(int node)
194{
195 return node / CCN_NUM_XP_PORTS;
196}
197
198static int arm_ccn_node_to_xp_port(int node)
199{
200 return node % CCN_NUM_XP_PORTS;
201}
202
203
204/*
205 * Bit shifts and masks in these defines must be kept in sync with
206 * arm_ccn_pmu_config_set() and CCN_FORMAT_ATTRs below!
207 */
208#define CCN_CONFIG_NODE(_config) (((_config) >> 0) & 0xff)
209#define CCN_CONFIG_XP(_config) (((_config) >> 0) & 0xff)
210#define CCN_CONFIG_TYPE(_config) (((_config) >> 8) & 0xff)
211#define CCN_CONFIG_EVENT(_config) (((_config) >> 16) & 0xff)
212#define CCN_CONFIG_PORT(_config) (((_config) >> 24) & 0x3)
213#define CCN_CONFIG_BUS(_config) (((_config) >> 24) & 0x3)
214#define CCN_CONFIG_VC(_config) (((_config) >> 26) & 0x7)
215#define CCN_CONFIG_DIR(_config) (((_config) >> 29) & 0x1)
216#define CCN_CONFIG_MASK(_config) (((_config) >> 30) & 0xf)
217
218static void arm_ccn_pmu_config_set(u64 *config, u32 node_xp, u32 type, u32 port)
219{
220 *config &= ~((0xff << 0) | (0xff << 8) | (0x3 << 24));
221 *config |= (node_xp << 0) | (type << 8) | (port << 24);
222}
223
224static ssize_t arm_ccn_pmu_format_show(struct device *dev,
225 struct device_attribute *attr, char *buf)
226{
227 struct dev_ext_attribute *ea = container_of(attr,
228 struct dev_ext_attribute, attr);
229
230 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)ea->var);
231}
232
233#define CCN_FORMAT_ATTR(_name, _config) \
234 struct dev_ext_attribute arm_ccn_pmu_format_attr_##_name = \
235 { __ATTR(_name, S_IRUGO, arm_ccn_pmu_format_show, \
236 NULL), _config }
237
238static CCN_FORMAT_ATTR(node, "config:0-7");
239static CCN_FORMAT_ATTR(xp, "config:0-7");
240static CCN_FORMAT_ATTR(type, "config:8-15");
241static CCN_FORMAT_ATTR(event, "config:16-23");
242static CCN_FORMAT_ATTR(port, "config:24-25");
243static CCN_FORMAT_ATTR(bus, "config:24-25");
244static CCN_FORMAT_ATTR(vc, "config:26-28");
245static CCN_FORMAT_ATTR(dir, "config:29-29");
246static CCN_FORMAT_ATTR(mask, "config:30-33");
247static CCN_FORMAT_ATTR(cmp_l, "config1:0-62");
248static CCN_FORMAT_ATTR(cmp_h, "config2:0-59");
249
250static struct attribute *arm_ccn_pmu_format_attrs[] = {
251 &arm_ccn_pmu_format_attr_node.attr.attr,
252 &arm_ccn_pmu_format_attr_xp.attr.attr,
253 &arm_ccn_pmu_format_attr_type.attr.attr,
254 &arm_ccn_pmu_format_attr_event.attr.attr,
255 &arm_ccn_pmu_format_attr_port.attr.attr,
256 &arm_ccn_pmu_format_attr_bus.attr.attr,
257 &arm_ccn_pmu_format_attr_vc.attr.attr,
258 &arm_ccn_pmu_format_attr_dir.attr.attr,
259 &arm_ccn_pmu_format_attr_mask.attr.attr,
260 &arm_ccn_pmu_format_attr_cmp_l.attr.attr,
261 &arm_ccn_pmu_format_attr_cmp_h.attr.attr,
262 NULL
263};
264
265static const struct attribute_group arm_ccn_pmu_format_attr_group = {
266 .name = "format",
267 .attrs = arm_ccn_pmu_format_attrs,
268};
269
270
271struct arm_ccn_pmu_event {
272 struct device_attribute attr;
273 u32 type;
274 u32 event;
275 int num_ports;
276 int num_vcs;
277 const char *def;
278 int mask;
279};
280
281#define CCN_EVENT_ATTR(_name) \
282 __ATTR(_name, S_IRUGO, arm_ccn_pmu_event_show, NULL)
283
284/*
285 * Events defined in TRM for MN, HN-I and SBSX are actually watchpoints set on
286 * their ports in XP they are connected to. For the sake of usability they are
287 * explicitly defined here (and translated into a relevant watchpoint in
288 * arm_ccn_pmu_event_init()) so the user can easily request them without deep
289 * knowledge of the flit format.
290 */
291
292#define CCN_EVENT_MN(_name, _def, _mask) { .attr = CCN_EVENT_ATTR(mn_##_name), \
293 .type = CCN_TYPE_MN, .event = CCN_EVENT_WATCHPOINT, \
294 .num_ports = CCN_NUM_XP_PORTS, .num_vcs = CCN_NUM_VCS, \
295 .def = _def, .mask = _mask, }
296
297#define CCN_EVENT_HNI(_name, _def, _mask) { \
298 .attr = CCN_EVENT_ATTR(hni_##_name), .type = CCN_TYPE_HNI, \
299 .event = CCN_EVENT_WATCHPOINT, .num_ports = CCN_NUM_XP_PORTS, \
300 .num_vcs = CCN_NUM_VCS, .def = _def, .mask = _mask, }
301
302#define CCN_EVENT_SBSX(_name, _def, _mask) { \
303 .attr = CCN_EVENT_ATTR(sbsx_##_name), .type = CCN_TYPE_SBSX, \
304 .event = CCN_EVENT_WATCHPOINT, .num_ports = CCN_NUM_XP_PORTS, \
305 .num_vcs = CCN_NUM_VCS, .def = _def, .mask = _mask, }
306
307#define CCN_EVENT_HNF(_name, _event) { .attr = CCN_EVENT_ATTR(hnf_##_name), \
308 .type = CCN_TYPE_HNF, .event = _event, }
309
310#define CCN_EVENT_XP(_name, _event) { .attr = CCN_EVENT_ATTR(xp_##_name), \
311 .type = CCN_TYPE_XP, .event = _event, \
312 .num_ports = CCN_NUM_XP_PORTS, .num_vcs = CCN_NUM_VCS, }
313
314/*
315 * RN-I & RN-D (RN-D = RN-I + DVM) nodes have different type ID depending
316 * on configuration. One of them is picked to represent the whole group,
317 * as they all share the same event types.
318 */
319#define CCN_EVENT_RNI(_name, _event) { .attr = CCN_EVENT_ATTR(rni_##_name), \
320 .type = CCN_TYPE_RNI_3P, .event = _event, }
321
322#define CCN_EVENT_SBAS(_name, _event) { .attr = CCN_EVENT_ATTR(sbas_##_name), \
323 .type = CCN_TYPE_SBAS, .event = _event, }
324
325#define CCN_EVENT_CYCLES(_name) { .attr = CCN_EVENT_ATTR(_name), \
326 .type = CCN_TYPE_CYCLES }
327
328
329static ssize_t arm_ccn_pmu_event_show(struct device *dev,
330 struct device_attribute *attr, char *buf)
331{
332 struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));
333 struct arm_ccn_pmu_event *event = container_of(attr,
334 struct arm_ccn_pmu_event, attr);
335 ssize_t res;
336
337 res = snprintf(buf, PAGE_SIZE, "type=0x%x", event->type);
338 if (event->event)
339 res += snprintf(buf + res, PAGE_SIZE - res, ",event=0x%x",
340 event->event);
341 if (event->def)
342 res += snprintf(buf + res, PAGE_SIZE - res, ",%s",
343 event->def);
344 if (event->mask)
345 res += snprintf(buf + res, PAGE_SIZE - res, ",mask=0x%x",
346 event->mask);
347
348 /* Arguments required by an event */
349 switch (event->type) {
350 case CCN_TYPE_CYCLES:
351 break;
352 case CCN_TYPE_XP:
353 res += snprintf(buf + res, PAGE_SIZE - res,
354 ",xp=?,vc=?");
355 if (event->event == CCN_EVENT_WATCHPOINT)
356 res += snprintf(buf + res, PAGE_SIZE - res,
357 ",port=?,dir=?,cmp_l=?,cmp_h=?,mask=?");
358 else
359 res += snprintf(buf + res, PAGE_SIZE - res,
360 ",bus=?");
361
362 break;
363 case CCN_TYPE_MN:
364 res += snprintf(buf + res, PAGE_SIZE - res, ",node=%d", ccn->mn_id);
365 break;
366 default:
367 res += snprintf(buf + res, PAGE_SIZE - res, ",node=?");
368 break;
369 }
370
371 res += snprintf(buf + res, PAGE_SIZE - res, "\n");
372
373 return res;
374}
375
376static umode_t arm_ccn_pmu_events_is_visible(struct kobject *kobj,
377 struct attribute *attr, int index)
378{
379 struct device *dev = kobj_to_dev(kobj);
380 struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));
381 struct device_attribute *dev_attr = container_of(attr,
382 struct device_attribute, attr);
383 struct arm_ccn_pmu_event *event = container_of(dev_attr,
384 struct arm_ccn_pmu_event, attr);
385
386 if (event->type == CCN_TYPE_SBAS && !ccn->sbas_present)
387 return 0;
388 if (event->type == CCN_TYPE_SBSX && !ccn->sbsx_present)
389 return 0;
390
391 return attr->mode;
392}
393
394static struct arm_ccn_pmu_event arm_ccn_pmu_events[] = {
395 CCN_EVENT_MN(eobarrier, "dir=1,vc=0,cmp_h=0x1c00", CCN_IDX_MASK_OPCODE),
396 CCN_EVENT_MN(ecbarrier, "dir=1,vc=0,cmp_h=0x1e00", CCN_IDX_MASK_OPCODE),
397 CCN_EVENT_MN(dvmop, "dir=1,vc=0,cmp_h=0x2800", CCN_IDX_MASK_OPCODE),
398 CCN_EVENT_HNI(txdatflits, "dir=1,vc=3", CCN_IDX_MASK_ANY),
399 CCN_EVENT_HNI(rxdatflits, "dir=0,vc=3", CCN_IDX_MASK_ANY),
400 CCN_EVENT_HNI(txreqflits, "dir=1,vc=0", CCN_IDX_MASK_ANY),
401 CCN_EVENT_HNI(rxreqflits, "dir=0,vc=0", CCN_IDX_MASK_ANY),
402 CCN_EVENT_HNI(rxreqflits_order, "dir=0,vc=0,cmp_h=0x8000",
403 CCN_IDX_MASK_ORDER),
404 CCN_EVENT_SBSX(txdatflits, "dir=1,vc=3", CCN_IDX_MASK_ANY),
405 CCN_EVENT_SBSX(rxdatflits, "dir=0,vc=3", CCN_IDX_MASK_ANY),
406 CCN_EVENT_SBSX(txreqflits, "dir=1,vc=0", CCN_IDX_MASK_ANY),
407 CCN_EVENT_SBSX(rxreqflits, "dir=0,vc=0", CCN_IDX_MASK_ANY),
408 CCN_EVENT_SBSX(rxreqflits_order, "dir=0,vc=0,cmp_h=0x8000",
409 CCN_IDX_MASK_ORDER),
410 CCN_EVENT_HNF(cache_miss, 0x1),
411 CCN_EVENT_HNF(l3_sf_cache_access, 0x02),
412 CCN_EVENT_HNF(cache_fill, 0x3),
413 CCN_EVENT_HNF(pocq_retry, 0x4),
414 CCN_EVENT_HNF(pocq_reqs_recvd, 0x5),
415 CCN_EVENT_HNF(sf_hit, 0x6),
416 CCN_EVENT_HNF(sf_evictions, 0x7),
417 CCN_EVENT_HNF(snoops_sent, 0x8),
418 CCN_EVENT_HNF(snoops_broadcast, 0x9),
419 CCN_EVENT_HNF(l3_eviction, 0xa),
420 CCN_EVENT_HNF(l3_fill_invalid_way, 0xb),
421 CCN_EVENT_HNF(mc_retries, 0xc),
422 CCN_EVENT_HNF(mc_reqs, 0xd),
423 CCN_EVENT_HNF(qos_hh_retry, 0xe),
424 CCN_EVENT_RNI(rdata_beats_p0, 0x1),
425 CCN_EVENT_RNI(rdata_beats_p1, 0x2),
426 CCN_EVENT_RNI(rdata_beats_p2, 0x3),
427 CCN_EVENT_RNI(rxdat_flits, 0x4),
428 CCN_EVENT_RNI(txdat_flits, 0x5),
429 CCN_EVENT_RNI(txreq_flits, 0x6),
430 CCN_EVENT_RNI(txreq_flits_retried, 0x7),
431 CCN_EVENT_RNI(rrt_full, 0x8),
432 CCN_EVENT_RNI(wrt_full, 0x9),
433 CCN_EVENT_RNI(txreq_flits_replayed, 0xa),
434 CCN_EVENT_XP(upload_starvation, 0x1),
435 CCN_EVENT_XP(download_starvation, 0x2),
436 CCN_EVENT_XP(respin, 0x3),
437 CCN_EVENT_XP(valid_flit, 0x4),
438 CCN_EVENT_XP(watchpoint, CCN_EVENT_WATCHPOINT),
439 CCN_EVENT_SBAS(rdata_beats_p0, 0x1),
440 CCN_EVENT_SBAS(rxdat_flits, 0x4),
441 CCN_EVENT_SBAS(txdat_flits, 0x5),
442 CCN_EVENT_SBAS(txreq_flits, 0x6),
443 CCN_EVENT_SBAS(txreq_flits_retried, 0x7),
444 CCN_EVENT_SBAS(rrt_full, 0x8),
445 CCN_EVENT_SBAS(wrt_full, 0x9),
446 CCN_EVENT_SBAS(txreq_flits_replayed, 0xa),
447 CCN_EVENT_CYCLES(cycles),
448};
449
450/* Populated in arm_ccn_init() */
451static struct attribute
452 *arm_ccn_pmu_events_attrs[ARRAY_SIZE(arm_ccn_pmu_events) + 1];
453
454static const struct attribute_group arm_ccn_pmu_events_attr_group = {
455 .name = "events",
456 .is_visible = arm_ccn_pmu_events_is_visible,
457 .attrs = arm_ccn_pmu_events_attrs,
458};
459
460
461static u64 *arm_ccn_pmu_get_cmp_mask(struct arm_ccn *ccn, const char *name)
462{
463 unsigned long i;
464
465 if (WARN_ON(!name || !name[0] || !isxdigit(name[0]) || !name[1]))
466 return NULL;
467 i = isdigit(name[0]) ? name[0] - '0' : 0xa + tolower(name[0]) - 'a';
468
469 switch (name[1]) {
470 case 'l':
471 return &ccn->dt.cmp_mask[i].l;
472 case 'h':
473 return &ccn->dt.cmp_mask[i].h;
474 default:
475 return NULL;
476 }
477}
478
479static ssize_t arm_ccn_pmu_cmp_mask_show(struct device *dev,
480 struct device_attribute *attr, char *buf)
481{
482 struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));
483 u64 *mask = arm_ccn_pmu_get_cmp_mask(ccn, attr->attr.name);
484
485 return mask ? snprintf(buf, PAGE_SIZE, "0x%016llx\n", *mask) : -EINVAL;
486}
487
488static ssize_t arm_ccn_pmu_cmp_mask_store(struct device *dev,
489 struct device_attribute *attr, const char *buf, size_t count)
490{
491 struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));
492 u64 *mask = arm_ccn_pmu_get_cmp_mask(ccn, attr->attr.name);
493 int err = -EINVAL;
494
495 if (mask)
496 err = kstrtoull(buf, 0, mask);
497
498 return err ? err : count;
499}
500
501#define CCN_CMP_MASK_ATTR(_name) \
502 struct device_attribute arm_ccn_pmu_cmp_mask_attr_##_name = \
503 __ATTR(_name, S_IRUGO | S_IWUSR, \
504 arm_ccn_pmu_cmp_mask_show, arm_ccn_pmu_cmp_mask_store)
505
506#define CCN_CMP_MASK_ATTR_RO(_name) \
507 struct device_attribute arm_ccn_pmu_cmp_mask_attr_##_name = \
508 __ATTR(_name, S_IRUGO, arm_ccn_pmu_cmp_mask_show, NULL)
509
510static CCN_CMP_MASK_ATTR(0l);
511static CCN_CMP_MASK_ATTR(0h);
512static CCN_CMP_MASK_ATTR(1l);
513static CCN_CMP_MASK_ATTR(1h);
514static CCN_CMP_MASK_ATTR(2l);
515static CCN_CMP_MASK_ATTR(2h);
516static CCN_CMP_MASK_ATTR(3l);
517static CCN_CMP_MASK_ATTR(3h);
518static CCN_CMP_MASK_ATTR(4l);
519static CCN_CMP_MASK_ATTR(4h);
520static CCN_CMP_MASK_ATTR(5l);
521static CCN_CMP_MASK_ATTR(5h);
522static CCN_CMP_MASK_ATTR(6l);
523static CCN_CMP_MASK_ATTR(6h);
524static CCN_CMP_MASK_ATTR(7l);
525static CCN_CMP_MASK_ATTR(7h);
526static CCN_CMP_MASK_ATTR_RO(8l);
527static CCN_CMP_MASK_ATTR_RO(8h);
528static CCN_CMP_MASK_ATTR_RO(9l);
529static CCN_CMP_MASK_ATTR_RO(9h);
530static CCN_CMP_MASK_ATTR_RO(al);
531static CCN_CMP_MASK_ATTR_RO(ah);
532static CCN_CMP_MASK_ATTR_RO(bl);
533static CCN_CMP_MASK_ATTR_RO(bh);
534
535static struct attribute *arm_ccn_pmu_cmp_mask_attrs[] = {
536 &arm_ccn_pmu_cmp_mask_attr_0l.attr, &arm_ccn_pmu_cmp_mask_attr_0h.attr,
537 &arm_ccn_pmu_cmp_mask_attr_1l.attr, &arm_ccn_pmu_cmp_mask_attr_1h.attr,
538 &arm_ccn_pmu_cmp_mask_attr_2l.attr, &arm_ccn_pmu_cmp_mask_attr_2h.attr,
539 &arm_ccn_pmu_cmp_mask_attr_3l.attr, &arm_ccn_pmu_cmp_mask_attr_3h.attr,
540 &arm_ccn_pmu_cmp_mask_attr_4l.attr, &arm_ccn_pmu_cmp_mask_attr_4h.attr,
541 &arm_ccn_pmu_cmp_mask_attr_5l.attr, &arm_ccn_pmu_cmp_mask_attr_5h.attr,
542 &arm_ccn_pmu_cmp_mask_attr_6l.attr, &arm_ccn_pmu_cmp_mask_attr_6h.attr,
543 &arm_ccn_pmu_cmp_mask_attr_7l.attr, &arm_ccn_pmu_cmp_mask_attr_7h.attr,
544 &arm_ccn_pmu_cmp_mask_attr_8l.attr, &arm_ccn_pmu_cmp_mask_attr_8h.attr,
545 &arm_ccn_pmu_cmp_mask_attr_9l.attr, &arm_ccn_pmu_cmp_mask_attr_9h.attr,
546 &arm_ccn_pmu_cmp_mask_attr_al.attr, &arm_ccn_pmu_cmp_mask_attr_ah.attr,
547 &arm_ccn_pmu_cmp_mask_attr_bl.attr, &arm_ccn_pmu_cmp_mask_attr_bh.attr,
548 NULL
549};
550
551static const struct attribute_group arm_ccn_pmu_cmp_mask_attr_group = {
552 .name = "cmp_mask",
553 .attrs = arm_ccn_pmu_cmp_mask_attrs,
554};
555
556static ssize_t arm_ccn_pmu_cpumask_show(struct device *dev,
557 struct device_attribute *attr, char *buf)
558{
559 struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));
560
561 return cpumap_print_to_pagebuf(true, buf, &ccn->dt.cpu);
562}
563
564static struct device_attribute arm_ccn_pmu_cpumask_attr =
565 __ATTR(cpumask, S_IRUGO, arm_ccn_pmu_cpumask_show, NULL);
566
567static struct attribute *arm_ccn_pmu_cpumask_attrs[] = {
568 &arm_ccn_pmu_cpumask_attr.attr,
569 NULL,
570};
571
572static const struct attribute_group arm_ccn_pmu_cpumask_attr_group = {
573 .attrs = arm_ccn_pmu_cpumask_attrs,
574};
575
576/*
577 * Default poll period is 10ms, which is way over the top anyway,
578 * as in the worst case scenario (an event every cycle), with 1GHz
579 * clocked bus, the smallest, 32 bit counter will overflow in
580 * more than 4s.
581 */
582static unsigned int arm_ccn_pmu_poll_period_us = 10000;
583module_param_named(pmu_poll_period_us, arm_ccn_pmu_poll_period_us, uint,
584 S_IRUGO | S_IWUSR);
585
586static ktime_t arm_ccn_pmu_timer_period(void)
587{
588 return ns_to_ktime((u64)arm_ccn_pmu_poll_period_us * 1000);
589}
590
591
592static const struct attribute_group *arm_ccn_pmu_attr_groups[] = {
593 &arm_ccn_pmu_events_attr_group,
594 &arm_ccn_pmu_format_attr_group,
595 &arm_ccn_pmu_cmp_mask_attr_group,
596 &arm_ccn_pmu_cpumask_attr_group,
597 NULL
598};
599
600
601static int arm_ccn_pmu_alloc_bit(unsigned long *bitmap, unsigned long size)
602{
603 int bit;
604
605 do {
606 bit = find_first_zero_bit(bitmap, size);
607 if (bit >= size)
608 return -EAGAIN;
609 } while (test_and_set_bit(bit, bitmap));
610
611 return bit;
612}
613
614/* All RN-I and RN-D nodes have identical PMUs */
615static int arm_ccn_pmu_type_eq(u32 a, u32 b)
616{
617 if (a == b)
618 return 1;
619
620 switch (a) {
621 case CCN_TYPE_RNI_1P:
622 case CCN_TYPE_RNI_2P:
623 case CCN_TYPE_RNI_3P:
624 case CCN_TYPE_RND_1P:
625 case CCN_TYPE_RND_2P:
626 case CCN_TYPE_RND_3P:
627 switch (b) {
628 case CCN_TYPE_RNI_1P:
629 case CCN_TYPE_RNI_2P:
630 case CCN_TYPE_RNI_3P:
631 case CCN_TYPE_RND_1P:
632 case CCN_TYPE_RND_2P:
633 case CCN_TYPE_RND_3P:
634 return 1;
635 }
636 break;
637 }
638
639 return 0;
640}
641
642static int arm_ccn_pmu_event_alloc(struct perf_event *event)
643{
644 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
645 struct hw_perf_event *hw = &event->hw;
646 u32 node_xp, type, event_id;
647 struct arm_ccn_component *source;
648 int bit;
649
650 node_xp = CCN_CONFIG_NODE(event->attr.config);
651 type = CCN_CONFIG_TYPE(event->attr.config);
652 event_id = CCN_CONFIG_EVENT(event->attr.config);
653
654 /* Allocate the cycle counter */
655 if (type == CCN_TYPE_CYCLES) {
656 if (test_and_set_bit(CCN_IDX_PMU_CYCLE_COUNTER,
657 ccn->dt.pmu_counters_mask))
658 return -EAGAIN;
659
660 hw->idx = CCN_IDX_PMU_CYCLE_COUNTER;
661 ccn->dt.pmu_counters[CCN_IDX_PMU_CYCLE_COUNTER].event = event;
662
663 return 0;
664 }
665
666 /* Allocate an event counter */
667 hw->idx = arm_ccn_pmu_alloc_bit(ccn->dt.pmu_counters_mask,
668 CCN_NUM_PMU_EVENT_COUNTERS);
669 if (hw->idx < 0) {
670 dev_dbg(ccn->dev, "No more counters available!\n");
671 return -EAGAIN;
672 }
673
674 if (type == CCN_TYPE_XP)
675 source = &ccn->xp[node_xp];
676 else
677 source = &ccn->node[node_xp];
678 ccn->dt.pmu_counters[hw->idx].source = source;
679
680 /* Allocate an event source or a watchpoint */
681 if (type == CCN_TYPE_XP && event_id == CCN_EVENT_WATCHPOINT)
682 bit = arm_ccn_pmu_alloc_bit(source->xp.dt_cmp_mask,
683 CCN_NUM_XP_WATCHPOINTS);
684 else
685 bit = arm_ccn_pmu_alloc_bit(source->pmu_events_mask,
686 CCN_NUM_PMU_EVENTS);
687 if (bit < 0) {
688 dev_dbg(ccn->dev, "No more event sources/watchpoints on node/XP %d!\n",
689 node_xp);
690 clear_bit(hw->idx, ccn->dt.pmu_counters_mask);
691 return -EAGAIN;
692 }
693 hw->config_base = bit;
694
695 ccn->dt.pmu_counters[hw->idx].event = event;
696
697 return 0;
698}
699
700static void arm_ccn_pmu_event_release(struct perf_event *event)
701{
702 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
703 struct hw_perf_event *hw = &event->hw;
704
705 if (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER) {
706 clear_bit(CCN_IDX_PMU_CYCLE_COUNTER, ccn->dt.pmu_counters_mask);
707 } else {
708 struct arm_ccn_component *source =
709 ccn->dt.pmu_counters[hw->idx].source;
710
711 if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP &&
712 CCN_CONFIG_EVENT(event->attr.config) ==
713 CCN_EVENT_WATCHPOINT)
714 clear_bit(hw->config_base, source->xp.dt_cmp_mask);
715 else
716 clear_bit(hw->config_base, source->pmu_events_mask);
717 clear_bit(hw->idx, ccn->dt.pmu_counters_mask);
718 }
719
720 ccn->dt.pmu_counters[hw->idx].source = NULL;
721 ccn->dt.pmu_counters[hw->idx].event = NULL;
722}
723
724static int arm_ccn_pmu_event_init(struct perf_event *event)
725{
726 struct arm_ccn *ccn;
727 struct hw_perf_event *hw = &event->hw;
728 u32 node_xp, type, event_id;
729 int valid;
730 int i;
731 struct perf_event *sibling;
732
733 if (event->attr.type != event->pmu->type)
734 return -ENOENT;
735
736 ccn = pmu_to_arm_ccn(event->pmu);
737
738 if (hw->sample_period) {
739 dev_warn(ccn->dev, "Sampling not supported!\n");
740 return -EOPNOTSUPP;
741 }
742
743 if (has_branch_stack(event) || event->attr.exclude_user ||
744 event->attr.exclude_kernel || event->attr.exclude_hv ||
745 event->attr.exclude_idle || event->attr.exclude_host ||
746 event->attr.exclude_guest) {
747 dev_warn(ccn->dev, "Can't exclude execution levels!\n");
748 return -EINVAL;
749 }
750
751 if (event->cpu < 0) {
752 dev_warn(ccn->dev, "Can't provide per-task data!\n");
753 return -EOPNOTSUPP;
754 }
755 /*
756 * Many perf core operations (eg. events rotation) operate on a
757 * single CPU context. This is obvious for CPU PMUs, where one
758 * expects the same sets of events being observed on all CPUs,
759 * but can lead to issues for off-core PMUs, like CCN, where each
760 * event could be theoretically assigned to a different CPU. To
761 * mitigate this, we enforce CPU assignment to one, selected
762 * processor (the one described in the "cpumask" attribute).
763 */
764 event->cpu = cpumask_first(&ccn->dt.cpu);
765
766 node_xp = CCN_CONFIG_NODE(event->attr.config);
767 type = CCN_CONFIG_TYPE(event->attr.config);
768 event_id = CCN_CONFIG_EVENT(event->attr.config);
769
770 /* Validate node/xp vs topology */
771 switch (type) {
772 case CCN_TYPE_MN:
773 if (node_xp != ccn->mn_id) {
774 dev_warn(ccn->dev, "Invalid MN ID %d!\n", node_xp);
775 return -EINVAL;
776 }
777 break;
778 case CCN_TYPE_XP:
779 if (node_xp >= ccn->num_xps) {
780 dev_warn(ccn->dev, "Invalid XP ID %d!\n", node_xp);
781 return -EINVAL;
782 }
783 break;
784 case CCN_TYPE_CYCLES:
785 break;
786 default:
787 if (node_xp >= ccn->num_nodes) {
788 dev_warn(ccn->dev, "Invalid node ID %d!\n", node_xp);
789 return -EINVAL;
790 }
791 if (!arm_ccn_pmu_type_eq(type, ccn->node[node_xp].type)) {
792 dev_warn(ccn->dev, "Invalid type 0x%x for node %d!\n",
793 type, node_xp);
794 return -EINVAL;
795 }
796 break;
797 }
798
799 /* Validate event ID vs available for the type */
800 for (i = 0, valid = 0; i < ARRAY_SIZE(arm_ccn_pmu_events) && !valid;
801 i++) {
802 struct arm_ccn_pmu_event *e = &arm_ccn_pmu_events[i];
803 u32 port = CCN_CONFIG_PORT(event->attr.config);
804 u32 vc = CCN_CONFIG_VC(event->attr.config);
805
806 if (!arm_ccn_pmu_type_eq(type, e->type))
807 continue;
808 if (event_id != e->event)
809 continue;
810 if (e->num_ports && port >= e->num_ports) {
811 dev_warn(ccn->dev, "Invalid port %d for node/XP %d!\n",
812 port, node_xp);
813 return -EINVAL;
814 }
815 if (e->num_vcs && vc >= e->num_vcs) {
816 dev_warn(ccn->dev, "Invalid vc %d for node/XP %d!\n",
817 vc, node_xp);
818 return -EINVAL;
819 }
820 valid = 1;
821 }
822 if (!valid) {
823 dev_warn(ccn->dev, "Invalid event 0x%x for node/XP %d!\n",
824 event_id, node_xp);
825 return -EINVAL;
826 }
827
828 /* Watchpoint-based event for a node is actually set on XP */
829 if (event_id == CCN_EVENT_WATCHPOINT && type != CCN_TYPE_XP) {
830 u32 port;
831
832 type = CCN_TYPE_XP;
833 port = arm_ccn_node_to_xp_port(node_xp);
834 node_xp = arm_ccn_node_to_xp(node_xp);
835
836 arm_ccn_pmu_config_set(&event->attr.config,
837 node_xp, type, port);
838 }
839
840 /*
841 * We must NOT create groups containing mixed PMUs, although software
842 * events are acceptable (for example to create a CCN group
843 * periodically read when a hrtimer aka cpu-clock leader triggers).
844 */
845 if (event->group_leader->pmu != event->pmu &&
846 !is_software_event(event->group_leader))
847 return -EINVAL;
848
849 for_each_sibling_event(sibling, event->group_leader) {
850 if (sibling->pmu != event->pmu &&
851 !is_software_event(sibling))
852 return -EINVAL;
853 }
854
855 return 0;
856}
857
858static u64 arm_ccn_pmu_read_counter(struct arm_ccn *ccn, int idx)
859{
860 u64 res;
861
862 if (idx == CCN_IDX_PMU_CYCLE_COUNTER) {
863#ifdef readq
864 res = readq(ccn->dt.base + CCN_DT_PMCCNTR);
865#else
866 /* 40 bit counter, can do snapshot and read in two parts */
867 writel(0x1, ccn->dt.base + CCN_DT_PMSR_REQ);
868 while (!(readl(ccn->dt.base + CCN_DT_PMSR) & 0x1))
869 ;
870 writel(0x1, ccn->dt.base + CCN_DT_PMSR_CLR);
871 res = readl(ccn->dt.base + CCN_DT_PMCCNTRSR + 4) & 0xff;
872 res <<= 32;
873 res |= readl(ccn->dt.base + CCN_DT_PMCCNTRSR);
874#endif
875 } else {
876 res = readl(ccn->dt.base + CCN_DT_PMEVCNT(idx));
877 }
878
879 return res;
880}
881
882static void arm_ccn_pmu_event_update(struct perf_event *event)
883{
884 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
885 struct hw_perf_event *hw = &event->hw;
886 u64 prev_count, new_count, mask;
887
888 do {
889 prev_count = local64_read(&hw->prev_count);
890 new_count = arm_ccn_pmu_read_counter(ccn, hw->idx);
891 } while (local64_xchg(&hw->prev_count, new_count) != prev_count);
892
893 mask = (1LLU << (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER ? 40 : 32)) - 1;
894
895 local64_add((new_count - prev_count) & mask, &event->count);
896}
897
898static void arm_ccn_pmu_xp_dt_config(struct perf_event *event, int enable)
899{
900 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
901 struct hw_perf_event *hw = &event->hw;
902 struct arm_ccn_component *xp;
903 u32 val, dt_cfg;
904
905 /* Nothing to do for cycle counter */
906 if (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER)
907 return;
908
909 if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP)
910 xp = &ccn->xp[CCN_CONFIG_XP(event->attr.config)];
911 else
912 xp = &ccn->xp[arm_ccn_node_to_xp(
913 CCN_CONFIG_NODE(event->attr.config))];
914
915 if (enable)
916 dt_cfg = hw->event_base;
917 else
918 dt_cfg = CCN_XP_DT_CONFIG__DT_CFG__PASS_THROUGH;
919
920 spin_lock(&ccn->dt.config_lock);
921
922 val = readl(xp->base + CCN_XP_DT_CONFIG);
923 val &= ~(CCN_XP_DT_CONFIG__DT_CFG__MASK <<
924 CCN_XP_DT_CONFIG__DT_CFG__SHIFT(hw->idx));
925 val |= dt_cfg << CCN_XP_DT_CONFIG__DT_CFG__SHIFT(hw->idx);
926 writel(val, xp->base + CCN_XP_DT_CONFIG);
927
928 spin_unlock(&ccn->dt.config_lock);
929}
930
931static void arm_ccn_pmu_event_start(struct perf_event *event, int flags)
932{
933 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
934 struct hw_perf_event *hw = &event->hw;
935
936 local64_set(&event->hw.prev_count,
937 arm_ccn_pmu_read_counter(ccn, hw->idx));
938 hw->state = 0;
939
940 /* Set the DT bus input, engaging the counter */
941 arm_ccn_pmu_xp_dt_config(event, 1);
942}
943
944static void arm_ccn_pmu_event_stop(struct perf_event *event, int flags)
945{
946 struct hw_perf_event *hw = &event->hw;
947
948 /* Disable counting, setting the DT bus to pass-through mode */
949 arm_ccn_pmu_xp_dt_config(event, 0);
950
951 if (flags & PERF_EF_UPDATE)
952 arm_ccn_pmu_event_update(event);
953
954 hw->state |= PERF_HES_STOPPED;
955}
956
957static void arm_ccn_pmu_xp_watchpoint_config(struct perf_event *event)
958{
959 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
960 struct hw_perf_event *hw = &event->hw;
961 struct arm_ccn_component *source =
962 ccn->dt.pmu_counters[hw->idx].source;
963 unsigned long wp = hw->config_base;
964 u32 val;
965 u64 cmp_l = event->attr.config1;
966 u64 cmp_h = event->attr.config2;
967 u64 mask_l = ccn->dt.cmp_mask[CCN_CONFIG_MASK(event->attr.config)].l;
968 u64 mask_h = ccn->dt.cmp_mask[CCN_CONFIG_MASK(event->attr.config)].h;
969
970 hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT(wp);
971
972 /* Direction (RX/TX), device (port) & virtual channel */
973 val = readl(source->base + CCN_XP_DT_INTERFACE_SEL);
974 val &= ~(CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__MASK <<
975 CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__SHIFT(wp));
976 val |= CCN_CONFIG_DIR(event->attr.config) <<
977 CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__SHIFT(wp);
978 val &= ~(CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__MASK <<
979 CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__SHIFT(wp));
980 val |= CCN_CONFIG_PORT(event->attr.config) <<
981 CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__SHIFT(wp);
982 val &= ~(CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__MASK <<
983 CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__SHIFT(wp));
984 val |= CCN_CONFIG_VC(event->attr.config) <<
985 CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__SHIFT(wp);
986 writel(val, source->base + CCN_XP_DT_INTERFACE_SEL);
987
988 /* Comparison values */
989 writel(cmp_l & 0xffffffff, source->base + CCN_XP_DT_CMP_VAL_L(wp));
990 writel((cmp_l >> 32) & 0x7fffffff,
991 source->base + CCN_XP_DT_CMP_VAL_L(wp) + 4);
992 writel(cmp_h & 0xffffffff, source->base + CCN_XP_DT_CMP_VAL_H(wp));
993 writel((cmp_h >> 32) & 0x0fffffff,
994 source->base + CCN_XP_DT_CMP_VAL_H(wp) + 4);
995
996 /* Mask */
997 writel(mask_l & 0xffffffff, source->base + CCN_XP_DT_CMP_MASK_L(wp));
998 writel((mask_l >> 32) & 0x7fffffff,
999 source->base + CCN_XP_DT_CMP_MASK_L(wp) + 4);
1000 writel(mask_h & 0xffffffff, source->base + CCN_XP_DT_CMP_MASK_H(wp));
1001 writel((mask_h >> 32) & 0x0fffffff,
1002 source->base + CCN_XP_DT_CMP_MASK_H(wp) + 4);
1003}
1004
1005static void arm_ccn_pmu_xp_event_config(struct perf_event *event)
1006{
1007 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
1008 struct hw_perf_event *hw = &event->hw;
1009 struct arm_ccn_component *source =
1010 ccn->dt.pmu_counters[hw->idx].source;
1011 u32 val, id;
1012
1013 hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__XP_PMU_EVENT(hw->config_base);
1014
1015 id = (CCN_CONFIG_VC(event->attr.config) << 4) |
1016 (CCN_CONFIG_BUS(event->attr.config) << 3) |
1017 (CCN_CONFIG_EVENT(event->attr.config) << 0);
1018
1019 val = readl(source->base + CCN_XP_PMU_EVENT_SEL);
1020 val &= ~(CCN_XP_PMU_EVENT_SEL__ID__MASK <<
1021 CCN_XP_PMU_EVENT_SEL__ID__SHIFT(hw->config_base));
1022 val |= id << CCN_XP_PMU_EVENT_SEL__ID__SHIFT(hw->config_base);
1023 writel(val, source->base + CCN_XP_PMU_EVENT_SEL);
1024}
1025
1026static void arm_ccn_pmu_node_event_config(struct perf_event *event)
1027{
1028 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
1029 struct hw_perf_event *hw = &event->hw;
1030 struct arm_ccn_component *source =
1031 ccn->dt.pmu_counters[hw->idx].source;
1032 u32 type = CCN_CONFIG_TYPE(event->attr.config);
1033 u32 val, port;
1034
1035 port = arm_ccn_node_to_xp_port(CCN_CONFIG_NODE(event->attr.config));
1036 hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__DEVICE_PMU_EVENT(port,
1037 hw->config_base);
1038
1039 /* These *_event_sel regs should be identical, but let's make sure... */
1040 BUILD_BUG_ON(CCN_HNF_PMU_EVENT_SEL != CCN_SBAS_PMU_EVENT_SEL);
1041 BUILD_BUG_ON(CCN_SBAS_PMU_EVENT_SEL != CCN_RNI_PMU_EVENT_SEL);
1042 BUILD_BUG_ON(CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(1) !=
1043 CCN_SBAS_PMU_EVENT_SEL__ID__SHIFT(1));
1044 BUILD_BUG_ON(CCN_SBAS_PMU_EVENT_SEL__ID__SHIFT(1) !=
1045 CCN_RNI_PMU_EVENT_SEL__ID__SHIFT(1));
1046 BUILD_BUG_ON(CCN_HNF_PMU_EVENT_SEL__ID__MASK !=
1047 CCN_SBAS_PMU_EVENT_SEL__ID__MASK);
1048 BUILD_BUG_ON(CCN_SBAS_PMU_EVENT_SEL__ID__MASK !=
1049 CCN_RNI_PMU_EVENT_SEL__ID__MASK);
1050 if (WARN_ON(type != CCN_TYPE_HNF && type != CCN_TYPE_SBAS &&
1051 !arm_ccn_pmu_type_eq(type, CCN_TYPE_RNI_3P)))
1052 return;
1053
1054 /* Set the event id for the pre-allocated counter */
1055 val = readl(source->base + CCN_HNF_PMU_EVENT_SEL);
1056 val &= ~(CCN_HNF_PMU_EVENT_SEL__ID__MASK <<
1057 CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(hw->config_base));
1058 val |= CCN_CONFIG_EVENT(event->attr.config) <<
1059 CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(hw->config_base);
1060 writel(val, source->base + CCN_HNF_PMU_EVENT_SEL);
1061}
1062
1063static void arm_ccn_pmu_event_config(struct perf_event *event)
1064{
1065 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
1066 struct hw_perf_event *hw = &event->hw;
1067 u32 xp, offset, val;
1068
1069 /* Cycle counter requires no setup */
1070 if (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER)
1071 return;
1072
1073 if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP)
1074 xp = CCN_CONFIG_XP(event->attr.config);
1075 else
1076 xp = arm_ccn_node_to_xp(CCN_CONFIG_NODE(event->attr.config));
1077
1078 spin_lock(&ccn->dt.config_lock);
1079
1080 /* Set the DT bus "distance" register */
1081 offset = (hw->idx / 4) * 4;
1082 val = readl(ccn->dt.base + CCN_DT_ACTIVE_DSM + offset);
1083 val &= ~(CCN_DT_ACTIVE_DSM__DSM_ID__MASK <<
1084 CCN_DT_ACTIVE_DSM__DSM_ID__SHIFT(hw->idx % 4));
1085 val |= xp << CCN_DT_ACTIVE_DSM__DSM_ID__SHIFT(hw->idx % 4);
1086 writel(val, ccn->dt.base + CCN_DT_ACTIVE_DSM + offset);
1087
1088 if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP) {
1089 if (CCN_CONFIG_EVENT(event->attr.config) ==
1090 CCN_EVENT_WATCHPOINT)
1091 arm_ccn_pmu_xp_watchpoint_config(event);
1092 else
1093 arm_ccn_pmu_xp_event_config(event);
1094 } else {
1095 arm_ccn_pmu_node_event_config(event);
1096 }
1097
1098 spin_unlock(&ccn->dt.config_lock);
1099}
1100
1101static int arm_ccn_pmu_active_counters(struct arm_ccn *ccn)
1102{
1103 return bitmap_weight(ccn->dt.pmu_counters_mask,
1104 CCN_NUM_PMU_EVENT_COUNTERS + 1);
1105}
1106
1107static int arm_ccn_pmu_event_add(struct perf_event *event, int flags)
1108{
1109 int err;
1110 struct hw_perf_event *hw = &event->hw;
1111 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
1112
1113 err = arm_ccn_pmu_event_alloc(event);
1114 if (err)
1115 return err;
1116
1117 /*
1118 * Pin the timer, so that the overflows are handled by the chosen
1119 * event->cpu (this is the same one as presented in "cpumask"
1120 * attribute).
1121 */
1122 if (!ccn->irq && arm_ccn_pmu_active_counters(ccn) == 1)
1123 hrtimer_start(&ccn->dt.hrtimer, arm_ccn_pmu_timer_period(),
1124 HRTIMER_MODE_REL_PINNED);
1125
1126 arm_ccn_pmu_event_config(event);
1127
1128 hw->state = PERF_HES_STOPPED;
1129
1130 if (flags & PERF_EF_START)
1131 arm_ccn_pmu_event_start(event, PERF_EF_UPDATE);
1132
1133 return 0;
1134}
1135
1136static void arm_ccn_pmu_event_del(struct perf_event *event, int flags)
1137{
1138 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
1139
1140 arm_ccn_pmu_event_stop(event, PERF_EF_UPDATE);
1141
1142 arm_ccn_pmu_event_release(event);
1143
1144 if (!ccn->irq && arm_ccn_pmu_active_counters(ccn) == 0)
1145 hrtimer_cancel(&ccn->dt.hrtimer);
1146}
1147
1148static void arm_ccn_pmu_event_read(struct perf_event *event)
1149{
1150 arm_ccn_pmu_event_update(event);
1151}
1152
1153static void arm_ccn_pmu_enable(struct pmu *pmu)
1154{
1155 struct arm_ccn *ccn = pmu_to_arm_ccn(pmu);
1156
1157 u32 val = readl(ccn->dt.base + CCN_DT_PMCR);
1158 val |= CCN_DT_PMCR__PMU_EN;
1159 writel(val, ccn->dt.base + CCN_DT_PMCR);
1160}
1161
1162static void arm_ccn_pmu_disable(struct pmu *pmu)
1163{
1164 struct arm_ccn *ccn = pmu_to_arm_ccn(pmu);
1165
1166 u32 val = readl(ccn->dt.base + CCN_DT_PMCR);
1167 val &= ~CCN_DT_PMCR__PMU_EN;
1168 writel(val, ccn->dt.base + CCN_DT_PMCR);
1169}
1170
1171static irqreturn_t arm_ccn_pmu_overflow_handler(struct arm_ccn_dt *dt)
1172{
1173 u32 pmovsr = readl(dt->base + CCN_DT_PMOVSR);
1174 int idx;
1175
1176 if (!pmovsr)
1177 return IRQ_NONE;
1178
1179 writel(pmovsr, dt->base + CCN_DT_PMOVSR_CLR);
1180
1181 BUILD_BUG_ON(CCN_IDX_PMU_CYCLE_COUNTER != CCN_NUM_PMU_EVENT_COUNTERS);
1182
1183 for (idx = 0; idx < CCN_NUM_PMU_EVENT_COUNTERS + 1; idx++) {
1184 struct perf_event *event = dt->pmu_counters[idx].event;
1185 int overflowed = pmovsr & BIT(idx);
1186
1187 WARN_ON_ONCE(overflowed && !event &&
1188 idx != CCN_IDX_PMU_CYCLE_COUNTER);
1189
1190 if (!event || !overflowed)
1191 continue;
1192
1193 arm_ccn_pmu_event_update(event);
1194 }
1195
1196 return IRQ_HANDLED;
1197}
1198
1199static enum hrtimer_restart arm_ccn_pmu_timer_handler(struct hrtimer *hrtimer)
1200{
1201 struct arm_ccn_dt *dt = container_of(hrtimer, struct arm_ccn_dt,
1202 hrtimer);
1203 unsigned long flags;
1204
1205 local_irq_save(flags);
1206 arm_ccn_pmu_overflow_handler(dt);
1207 local_irq_restore(flags);
1208
1209 hrtimer_forward_now(hrtimer, arm_ccn_pmu_timer_period());
1210 return HRTIMER_RESTART;
1211}
1212
1213
1214static int arm_ccn_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
1215{
1216 struct arm_ccn_dt *dt = hlist_entry_safe(node, struct arm_ccn_dt, node);
1217 struct arm_ccn *ccn = container_of(dt, struct arm_ccn, dt);
1218 unsigned int target;
1219
1220 if (!cpumask_test_and_clear_cpu(cpu, &dt->cpu))
1221 return 0;
1222 target = cpumask_any_but(cpu_online_mask, cpu);
1223 if (target >= nr_cpu_ids)
1224 return 0;
1225 perf_pmu_migrate_context(&dt->pmu, cpu, target);
1226 cpumask_set_cpu(target, &dt->cpu);
1227 if (ccn->irq)
1228 WARN_ON(irq_set_affinity_hint(ccn->irq, &dt->cpu) != 0);
1229 return 0;
1230}
1231
1232static DEFINE_IDA(arm_ccn_pmu_ida);
1233
1234static int arm_ccn_pmu_init(struct arm_ccn *ccn)
1235{
1236 int i;
1237 char *name;
1238 int err;
1239
1240 /* Initialize DT subsystem */
1241 ccn->dt.base = ccn->base + CCN_REGION_SIZE;
1242 spin_lock_init(&ccn->dt.config_lock);
1243 writel(CCN_DT_PMOVSR_CLR__MASK, ccn->dt.base + CCN_DT_PMOVSR_CLR);
1244 writel(CCN_DT_CTL__DT_EN, ccn->dt.base + CCN_DT_CTL);
1245 writel(CCN_DT_PMCR__OVFL_INTR_EN | CCN_DT_PMCR__PMU_EN,
1246 ccn->dt.base + CCN_DT_PMCR);
1247 writel(0x1, ccn->dt.base + CCN_DT_PMSR_CLR);
1248 for (i = 0; i < ccn->num_xps; i++) {
1249 writel(0, ccn->xp[i].base + CCN_XP_DT_CONFIG);
1250 writel((CCN_XP_DT_CONTROL__WP_ARM_SEL__ALWAYS <<
1251 CCN_XP_DT_CONTROL__WP_ARM_SEL__SHIFT(0)) |
1252 (CCN_XP_DT_CONTROL__WP_ARM_SEL__ALWAYS <<
1253 CCN_XP_DT_CONTROL__WP_ARM_SEL__SHIFT(1)) |
1254 CCN_XP_DT_CONTROL__DT_ENABLE,
1255 ccn->xp[i].base + CCN_XP_DT_CONTROL);
1256 }
1257 ccn->dt.cmp_mask[CCN_IDX_MASK_ANY].l = ~0;
1258 ccn->dt.cmp_mask[CCN_IDX_MASK_ANY].h = ~0;
1259 ccn->dt.cmp_mask[CCN_IDX_MASK_EXACT].l = 0;
1260 ccn->dt.cmp_mask[CCN_IDX_MASK_EXACT].h = 0;
1261 ccn->dt.cmp_mask[CCN_IDX_MASK_ORDER].l = ~0;
1262 ccn->dt.cmp_mask[CCN_IDX_MASK_ORDER].h = ~(0x1 << 15);
1263 ccn->dt.cmp_mask[CCN_IDX_MASK_OPCODE].l = ~0;
1264 ccn->dt.cmp_mask[CCN_IDX_MASK_OPCODE].h = ~(0x1f << 9);
1265
1266 /* Get a convenient /sys/event_source/devices/ name */
1267 ccn->dt.id = ida_simple_get(&arm_ccn_pmu_ida, 0, 0, GFP_KERNEL);
1268 if (ccn->dt.id == 0) {
1269 name = "ccn";
1270 } else {
1271 name = devm_kasprintf(ccn->dev, GFP_KERNEL, "ccn_%d",
1272 ccn->dt.id);
1273 if (!name) {
1274 err = -ENOMEM;
1275 goto error_choose_name;
1276 }
1277 }
1278
1279 /* Perf driver registration */
1280 ccn->dt.pmu = (struct pmu) {
1281 .module = THIS_MODULE,
1282 .attr_groups = arm_ccn_pmu_attr_groups,
1283 .task_ctx_nr = perf_invalid_context,
1284 .event_init = arm_ccn_pmu_event_init,
1285 .add = arm_ccn_pmu_event_add,
1286 .del = arm_ccn_pmu_event_del,
1287 .start = arm_ccn_pmu_event_start,
1288 .stop = arm_ccn_pmu_event_stop,
1289 .read = arm_ccn_pmu_event_read,
1290 .pmu_enable = arm_ccn_pmu_enable,
1291 .pmu_disable = arm_ccn_pmu_disable,
1292 };
1293
1294 /* No overflow interrupt? Have to use a timer instead. */
1295 if (!ccn->irq) {
1296 dev_info(ccn->dev, "No access to interrupts, using timer.\n");
1297 hrtimer_init(&ccn->dt.hrtimer, CLOCK_MONOTONIC,
1298 HRTIMER_MODE_REL);
1299 ccn->dt.hrtimer.function = arm_ccn_pmu_timer_handler;
1300 }
1301
1302 /* Pick one CPU which we will use to collect data from CCN... */
1303 cpumask_set_cpu(get_cpu(), &ccn->dt.cpu);
1304
1305 /* Also make sure that the overflow interrupt is handled by this CPU */
1306 if (ccn->irq) {
1307 err = irq_set_affinity_hint(ccn->irq, &ccn->dt.cpu);
1308 if (err) {
1309 dev_err(ccn->dev, "Failed to set interrupt affinity!\n");
1310 goto error_set_affinity;
1311 }
1312 }
1313
1314 err = perf_pmu_register(&ccn->dt.pmu, name, -1);
1315 if (err)
1316 goto error_pmu_register;
1317
1318 cpuhp_state_add_instance_nocalls(CPUHP_AP_PERF_ARM_CCN_ONLINE,
1319 &ccn->dt.node);
1320 put_cpu();
1321 return 0;
1322
1323error_pmu_register:
1324error_set_affinity:
1325 put_cpu();
1326error_choose_name:
1327 ida_simple_remove(&arm_ccn_pmu_ida, ccn->dt.id);
1328 for (i = 0; i < ccn->num_xps; i++)
1329 writel(0, ccn->xp[i].base + CCN_XP_DT_CONTROL);
1330 writel(0, ccn->dt.base + CCN_DT_PMCR);
1331 return err;
1332}
1333
1334static void arm_ccn_pmu_cleanup(struct arm_ccn *ccn)
1335{
1336 int i;
1337
1338 cpuhp_state_remove_instance_nocalls(CPUHP_AP_PERF_ARM_CCN_ONLINE,
1339 &ccn->dt.node);
1340 if (ccn->irq)
1341 irq_set_affinity_hint(ccn->irq, NULL);
1342 for (i = 0; i < ccn->num_xps; i++)
1343 writel(0, ccn->xp[i].base + CCN_XP_DT_CONTROL);
1344 writel(0, ccn->dt.base + CCN_DT_PMCR);
1345 perf_pmu_unregister(&ccn->dt.pmu);
1346 ida_simple_remove(&arm_ccn_pmu_ida, ccn->dt.id);
1347}
1348
1349static int arm_ccn_for_each_valid_region(struct arm_ccn *ccn,
1350 int (*callback)(struct arm_ccn *ccn, int region,
1351 void __iomem *base, u32 type, u32 id))
1352{
1353 int region;
1354
1355 for (region = 0; region < CCN_NUM_REGIONS; region++) {
1356 u32 val, type, id;
1357 void __iomem *base;
1358 int err;
1359
1360 val = readl(ccn->base + CCN_MN_OLY_COMP_LIST_63_0 +
1361 4 * (region / 32));
1362 if (!(val & (1 << (region % 32))))
1363 continue;
1364
1365 base = ccn->base + region * CCN_REGION_SIZE;
1366 val = readl(base + CCN_ALL_OLY_ID);
1367 type = (val >> CCN_ALL_OLY_ID__OLY_ID__SHIFT) &
1368 CCN_ALL_OLY_ID__OLY_ID__MASK;
1369 id = (val >> CCN_ALL_OLY_ID__NODE_ID__SHIFT) &
1370 CCN_ALL_OLY_ID__NODE_ID__MASK;
1371
1372 err = callback(ccn, region, base, type, id);
1373 if (err)
1374 return err;
1375 }
1376
1377 return 0;
1378}
1379
1380static int arm_ccn_get_nodes_num(struct arm_ccn *ccn, int region,
1381 void __iomem *base, u32 type, u32 id)
1382{
1383
1384 if (type == CCN_TYPE_XP && id >= ccn->num_xps)
1385 ccn->num_xps = id + 1;
1386 else if (id >= ccn->num_nodes)
1387 ccn->num_nodes = id + 1;
1388
1389 return 0;
1390}
1391
1392static int arm_ccn_init_nodes(struct arm_ccn *ccn, int region,
1393 void __iomem *base, u32 type, u32 id)
1394{
1395 struct arm_ccn_component *component;
1396
1397 dev_dbg(ccn->dev, "Region %d: id=%u, type=0x%02x\n", region, id, type);
1398
1399 switch (type) {
1400 case CCN_TYPE_MN:
1401 ccn->mn_id = id;
1402 return 0;
1403 case CCN_TYPE_DT:
1404 return 0;
1405 case CCN_TYPE_XP:
1406 component = &ccn->xp[id];
1407 break;
1408 case CCN_TYPE_SBSX:
1409 ccn->sbsx_present = 1;
1410 component = &ccn->node[id];
1411 break;
1412 case CCN_TYPE_SBAS:
1413 ccn->sbas_present = 1;
1414 /* Fall-through */
1415 default:
1416 component = &ccn->node[id];
1417 break;
1418 }
1419
1420 component->base = base;
1421 component->type = type;
1422
1423 return 0;
1424}
1425
1426
1427static irqreturn_t arm_ccn_error_handler(struct arm_ccn *ccn,
1428 const u32 *err_sig_val)
1429{
1430 /* This should be really handled by firmware... */
1431 dev_err(ccn->dev, "Error reported in %08x%08x%08x%08x%08x%08x.\n",
1432 err_sig_val[5], err_sig_val[4], err_sig_val[3],
1433 err_sig_val[2], err_sig_val[1], err_sig_val[0]);
1434 dev_err(ccn->dev, "Disabling interrupt generation for all errors.\n");
1435 writel(CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLE,
1436 ccn->base + CCN_MN_ERRINT_STATUS);
1437
1438 return IRQ_HANDLED;
1439}
1440
1441
1442static irqreturn_t arm_ccn_irq_handler(int irq, void *dev_id)
1443{
1444 irqreturn_t res = IRQ_NONE;
1445 struct arm_ccn *ccn = dev_id;
1446 u32 err_sig_val[6];
1447 u32 err_or;
1448 int i;
1449
1450 /* PMU overflow is a special case */
1451 err_or = err_sig_val[0] = readl(ccn->base + CCN_MN_ERR_SIG_VAL_63_0);
1452 if (err_or & CCN_MN_ERR_SIG_VAL_63_0__DT) {
1453 err_or &= ~CCN_MN_ERR_SIG_VAL_63_0__DT;
1454 res = arm_ccn_pmu_overflow_handler(&ccn->dt);
1455 }
1456
1457 /* Have to read all err_sig_vals to clear them */
1458 for (i = 1; i < ARRAY_SIZE(err_sig_val); i++) {
1459 err_sig_val[i] = readl(ccn->base +
1460 CCN_MN_ERR_SIG_VAL_63_0 + i * 4);
1461 err_or |= err_sig_val[i];
1462 }
1463 if (err_or)
1464 res |= arm_ccn_error_handler(ccn, err_sig_val);
1465
1466 if (res != IRQ_NONE)
1467 writel(CCN_MN_ERRINT_STATUS__INTREQ__DESSERT,
1468 ccn->base + CCN_MN_ERRINT_STATUS);
1469
1470 return res;
1471}
1472
1473
1474static int arm_ccn_probe(struct platform_device *pdev)
1475{
1476 struct arm_ccn *ccn;
1477 struct resource *res;
1478 unsigned int irq;
1479 int err;
1480
1481 ccn = devm_kzalloc(&pdev->dev, sizeof(*ccn), GFP_KERNEL);
1482 if (!ccn)
1483 return -ENOMEM;
1484 ccn->dev = &pdev->dev;
1485 platform_set_drvdata(pdev, ccn);
1486
1487 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1488 if (!res)
1489 return -EINVAL;
1490
1491 if (!devm_request_mem_region(ccn->dev, res->start,
1492 resource_size(res), pdev->name))
1493 return -EBUSY;
1494
1495 ccn->base = devm_ioremap(ccn->dev, res->start,
1496 resource_size(res));
1497 if (!ccn->base)
1498 return -EFAULT;
1499
1500 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1501 if (!res)
1502 return -EINVAL;
1503 irq = res->start;
1504
1505 /* Check if we can use the interrupt */
1506 writel(CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLE,
1507 ccn->base + CCN_MN_ERRINT_STATUS);
1508 if (readl(ccn->base + CCN_MN_ERRINT_STATUS) &
1509 CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLED) {
1510 /* Can set 'disable' bits, so can acknowledge interrupts */
1511 writel(CCN_MN_ERRINT_STATUS__PMU_EVENTS__ENABLE,
1512 ccn->base + CCN_MN_ERRINT_STATUS);
1513 err = devm_request_irq(ccn->dev, irq, arm_ccn_irq_handler,
1514 IRQF_NOBALANCING | IRQF_NO_THREAD,
1515 dev_name(ccn->dev), ccn);
1516 if (err)
1517 return err;
1518
1519 ccn->irq = irq;
1520 }
1521
1522
1523 /* Build topology */
1524
1525 err = arm_ccn_for_each_valid_region(ccn, arm_ccn_get_nodes_num);
1526 if (err)
1527 return err;
1528
1529 ccn->node = devm_kcalloc(ccn->dev, ccn->num_nodes, sizeof(*ccn->node),
1530 GFP_KERNEL);
1531 ccn->xp = devm_kcalloc(ccn->dev, ccn->num_xps, sizeof(*ccn->node),
1532 GFP_KERNEL);
1533 if (!ccn->node || !ccn->xp)
1534 return -ENOMEM;
1535
1536 err = arm_ccn_for_each_valid_region(ccn, arm_ccn_init_nodes);
1537 if (err)
1538 return err;
1539
1540 return arm_ccn_pmu_init(ccn);
1541}
1542
1543static int arm_ccn_remove(struct platform_device *pdev)
1544{
1545 struct arm_ccn *ccn = platform_get_drvdata(pdev);
1546
1547 arm_ccn_pmu_cleanup(ccn);
1548
1549 return 0;
1550}
1551
1552static const struct of_device_id arm_ccn_match[] = {
1553 { .compatible = "arm,ccn-502", },
1554 { .compatible = "arm,ccn-504", },
1555 {},
1556};
1557MODULE_DEVICE_TABLE(of, arm_ccn_match);
1558
1559static struct platform_driver arm_ccn_driver = {
1560 .driver = {
1561 .name = "arm-ccn",
1562 .of_match_table = arm_ccn_match,
1563 },
1564 .probe = arm_ccn_probe,
1565 .remove = arm_ccn_remove,
1566};
1567
1568static int __init arm_ccn_init(void)
1569{
1570 int i, ret;
1571
1572 ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_CCN_ONLINE,
1573 "perf/arm/ccn:online", NULL,
1574 arm_ccn_pmu_offline_cpu);
1575 if (ret)
1576 return ret;
1577
1578 for (i = 0; i < ARRAY_SIZE(arm_ccn_pmu_events); i++)
1579 arm_ccn_pmu_events_attrs[i] = &arm_ccn_pmu_events[i].attr.attr;
1580
1581 ret = platform_driver_register(&arm_ccn_driver);
1582 if (ret)
1583 cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_CCN_ONLINE);
1584 return ret;
1585}
1586
1587static void __exit arm_ccn_exit(void)
1588{
1589 platform_driver_unregister(&arm_ccn_driver);
1590 cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_CCN_ONLINE);
1591}
1592
1593module_init(arm_ccn_init);
1594module_exit(arm_ccn_exit);
1595
1596MODULE_AUTHOR("Pawel Moll <pawel.moll@arm.com>");
1597MODULE_LICENSE("GPL");