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