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a33b0daa PM |
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> | |
ac316725 | 20 | #include <linux/mod_devicetable.h> |
a33b0daa PM |
21 | #include <linux/perf_event.h> |
22 | #include <linux/platform_device.h> | |
23 | #include <linux/slab.h> | |
24 | ||
25 | #define CCN_NUM_XP_PORTS 2 | |
26 | #define CCN_NUM_VCS 4 | |
27 | #define CCN_NUM_REGIONS 256 | |
28 | #define CCN_REGION_SIZE 0x10000 | |
29 | ||
30 | #define CCN_ALL_OLY_ID 0xff00 | |
31 | #define CCN_ALL_OLY_ID__OLY_ID__SHIFT 0 | |
32 | #define CCN_ALL_OLY_ID__OLY_ID__MASK 0x1f | |
33 | #define CCN_ALL_OLY_ID__NODE_ID__SHIFT 8 | |
34 | #define CCN_ALL_OLY_ID__NODE_ID__MASK 0x3f | |
35 | ||
36 | #define CCN_MN_ERRINT_STATUS 0x0008 | |
37 | #define CCN_MN_ERRINT_STATUS__INTREQ__DESSERT 0x11 | |
38 | #define CCN_MN_ERRINT_STATUS__ALL_ERRORS__ENABLE 0x02 | |
39 | #define CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLED 0x20 | |
40 | #define CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLE 0x22 | |
41 | #define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_ENABLE 0x04 | |
42 | #define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_DISABLED 0x40 | |
43 | #define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_DISABLE 0x44 | |
44 | #define CCN_MN_ERRINT_STATUS__PMU_EVENTS__ENABLE 0x08 | |
45 | #define CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLED 0x80 | |
46 | #define CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLE 0x88 | |
47 | #define CCN_MN_OLY_COMP_LIST_63_0 0x01e0 | |
48 | #define CCN_MN_ERR_SIG_VAL_63_0 0x0300 | |
49 | #define CCN_MN_ERR_SIG_VAL_63_0__DT (1 << 1) | |
50 | ||
51 | #define CCN_DT_ACTIVE_DSM 0x0000 | |
52 | #define CCN_DT_ACTIVE_DSM__DSM_ID__SHIFT(n) ((n) * 8) | |
53 | #define CCN_DT_ACTIVE_DSM__DSM_ID__MASK 0xff | |
54 | #define CCN_DT_CTL 0x0028 | |
55 | #define CCN_DT_CTL__DT_EN (1 << 0) | |
56 | #define CCN_DT_PMEVCNT(n) (0x0100 + (n) * 0x8) | |
57 | #define CCN_DT_PMCCNTR 0x0140 | |
58 | #define CCN_DT_PMCCNTRSR 0x0190 | |
59 | #define CCN_DT_PMOVSR 0x0198 | |
60 | #define CCN_DT_PMOVSR_CLR 0x01a0 | |
fa637bf0 | 61 | #define CCN_DT_PMOVSR_CLR__MASK 0x1f |
a33b0daa PM |
62 | #define CCN_DT_PMCR 0x01a8 |
63 | #define CCN_DT_PMCR__OVFL_INTR_EN (1 << 6) | |
64 | #define CCN_DT_PMCR__PMU_EN (1 << 0) | |
65 | #define CCN_DT_PMSR 0x01b0 | |
66 | #define CCN_DT_PMSR_REQ 0x01b8 | |
67 | #define CCN_DT_PMSR_CLR 0x01c0 | |
68 | ||
69 | #define CCN_HNF_PMU_EVENT_SEL 0x0600 | |
70 | #define CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4) | |
71 | #define CCN_HNF_PMU_EVENT_SEL__ID__MASK 0xf | |
72 | ||
73 | #define CCN_XP_DT_CONFIG 0x0300 | |
74 | #define CCN_XP_DT_CONFIG__DT_CFG__SHIFT(n) ((n) * 4) | |
75 | #define CCN_XP_DT_CONFIG__DT_CFG__MASK 0xf | |
76 | #define CCN_XP_DT_CONFIG__DT_CFG__PASS_THROUGH 0x0 | |
77 | #define CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT_0_OR_1 0x1 | |
78 | #define CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT(n) (0x2 + (n)) | |
79 | #define CCN_XP_DT_CONFIG__DT_CFG__XP_PMU_EVENT(n) (0x4 + (n)) | |
80 | #define CCN_XP_DT_CONFIG__DT_CFG__DEVICE_PMU_EVENT(d, n) (0x8 + (d) * 4 + (n)) | |
81 | #define CCN_XP_DT_INTERFACE_SEL 0x0308 | |
82 | #define CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__SHIFT(n) (0 + (n) * 8) | |
83 | #define CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__MASK 0x1 | |
84 | #define CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__SHIFT(n) (1 + (n) * 8) | |
85 | #define CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__MASK 0x1 | |
86 | #define CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__SHIFT(n) (2 + (n) * 8) | |
87 | #define CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__MASK 0x3 | |
88 | #define CCN_XP_DT_CMP_VAL_L(n) (0x0310 + (n) * 0x40) | |
89 | #define CCN_XP_DT_CMP_VAL_H(n) (0x0318 + (n) * 0x40) | |
90 | #define CCN_XP_DT_CMP_MASK_L(n) (0x0320 + (n) * 0x40) | |
91 | #define CCN_XP_DT_CMP_MASK_H(n) (0x0328 + (n) * 0x40) | |
92 | #define CCN_XP_DT_CONTROL 0x0370 | |
93 | #define CCN_XP_DT_CONTROL__DT_ENABLE (1 << 0) | |
94 | #define CCN_XP_DT_CONTROL__WP_ARM_SEL__SHIFT(n) (12 + (n) * 4) | |
95 | #define CCN_XP_DT_CONTROL__WP_ARM_SEL__MASK 0xf | |
96 | #define CCN_XP_DT_CONTROL__WP_ARM_SEL__ALWAYS 0xf | |
97 | #define CCN_XP_PMU_EVENT_SEL 0x0600 | |
98 | #define CCN_XP_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 7) | |
99 | #define CCN_XP_PMU_EVENT_SEL__ID__MASK 0x3f | |
100 | ||
101 | #define CCN_SBAS_PMU_EVENT_SEL 0x0600 | |
102 | #define CCN_SBAS_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4) | |
103 | #define CCN_SBAS_PMU_EVENT_SEL__ID__MASK 0xf | |
104 | ||
105 | #define CCN_RNI_PMU_EVENT_SEL 0x0600 | |
106 | #define CCN_RNI_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4) | |
107 | #define CCN_RNI_PMU_EVENT_SEL__ID__MASK 0xf | |
108 | ||
109 | #define CCN_TYPE_MN 0x01 | |
110 | #define CCN_TYPE_DT 0x02 | |
111 | #define CCN_TYPE_HNF 0x04 | |
112 | #define CCN_TYPE_HNI 0x05 | |
113 | #define CCN_TYPE_XP 0x08 | |
114 | #define CCN_TYPE_SBSX 0x0c | |
115 | #define CCN_TYPE_SBAS 0x10 | |
116 | #define CCN_TYPE_RNI_1P 0x14 | |
117 | #define CCN_TYPE_RNI_2P 0x15 | |
118 | #define CCN_TYPE_RNI_3P 0x16 | |
119 | #define CCN_TYPE_RND_1P 0x18 /* RN-D = RN-I + DVM */ | |
120 | #define CCN_TYPE_RND_2P 0x19 | |
121 | #define CCN_TYPE_RND_3P 0x1a | |
122 | #define CCN_TYPE_CYCLES 0xff /* Pseudotype */ | |
123 | ||
124 | #define CCN_EVENT_WATCHPOINT 0xfe /* Pseudoevent */ | |
125 | ||
126 | #define CCN_NUM_PMU_EVENTS 4 | |
127 | #define CCN_NUM_XP_WATCHPOINTS 2 /* See DT.dbg_id.num_watchpoints */ | |
128 | #define CCN_NUM_PMU_EVENT_COUNTERS 8 /* See DT.dbg_id.num_pmucntr */ | |
129 | #define CCN_IDX_PMU_CYCLE_COUNTER CCN_NUM_PMU_EVENT_COUNTERS | |
130 | ||
131 | #define CCN_NUM_PREDEFINED_MASKS 4 | |
132 | #define CCN_IDX_MASK_ANY (CCN_NUM_PMU_EVENT_COUNTERS + 0) | |
133 | #define CCN_IDX_MASK_EXACT (CCN_NUM_PMU_EVENT_COUNTERS + 1) | |
134 | #define CCN_IDX_MASK_ORDER (CCN_NUM_PMU_EVENT_COUNTERS + 2) | |
135 | #define CCN_IDX_MASK_OPCODE (CCN_NUM_PMU_EVENT_COUNTERS + 3) | |
136 | ||
137 | struct arm_ccn_component { | |
138 | void __iomem *base; | |
139 | u32 type; | |
140 | ||
141 | DECLARE_BITMAP(pmu_events_mask, CCN_NUM_PMU_EVENTS); | |
142 | union { | |
143 | struct { | |
144 | DECLARE_BITMAP(dt_cmp_mask, CCN_NUM_XP_WATCHPOINTS); | |
145 | } xp; | |
146 | }; | |
147 | }; | |
148 | ||
149 | #define pmu_to_arm_ccn(_pmu) container_of(container_of(_pmu, \ | |
150 | struct arm_ccn_dt, pmu), struct arm_ccn, dt) | |
151 | ||
152 | struct arm_ccn_dt { | |
153 | int id; | |
154 | void __iomem *base; | |
155 | ||
156 | spinlock_t config_lock; | |
157 | ||
158 | DECLARE_BITMAP(pmu_counters_mask, CCN_NUM_PMU_EVENT_COUNTERS + 1); | |
159 | struct { | |
160 | struct arm_ccn_component *source; | |
161 | struct perf_event *event; | |
162 | } pmu_counters[CCN_NUM_PMU_EVENT_COUNTERS + 1]; | |
163 | ||
164 | struct { | |
165 | u64 l, h; | |
166 | } cmp_mask[CCN_NUM_PMU_EVENT_COUNTERS + CCN_NUM_PREDEFINED_MASKS]; | |
167 | ||
168 | struct hrtimer hrtimer; | |
169 | ||
ffa41524 | 170 | cpumask_t cpu; |
8df03872 | 171 | struct hlist_node node; |
ffa41524 | 172 | |
a33b0daa PM |
173 | struct pmu pmu; |
174 | }; | |
175 | ||
176 | struct arm_ccn { | |
177 | struct device *dev; | |
178 | void __iomem *base; | |
ffa41524 PM |
179 | unsigned int irq; |
180 | ||
a33b0daa PM |
181 | unsigned sbas_present:1; |
182 | unsigned sbsx_present:1; | |
183 | ||
184 | int num_nodes; | |
185 | struct arm_ccn_component *node; | |
186 | ||
187 | int num_xps; | |
188 | struct arm_ccn_component *xp; | |
189 | ||
190 | struct arm_ccn_dt dt; | |
4e486cba | 191 | int mn_id; |
a33b0daa PM |
192 | }; |
193 | ||
a33b0daa PM |
194 | static int arm_ccn_node_to_xp(int node) |
195 | { | |
196 | return node / CCN_NUM_XP_PORTS; | |
197 | } | |
198 | ||
199 | static int arm_ccn_node_to_xp_port(int node) | |
200 | { | |
201 | return node % CCN_NUM_XP_PORTS; | |
202 | } | |
203 | ||
204 | ||
205 | /* | |
206 | * Bit shifts and masks in these defines must be kept in sync with | |
207 | * arm_ccn_pmu_config_set() and CCN_FORMAT_ATTRs below! | |
208 | */ | |
209 | #define CCN_CONFIG_NODE(_config) (((_config) >> 0) & 0xff) | |
210 | #define CCN_CONFIG_XP(_config) (((_config) >> 0) & 0xff) | |
211 | #define CCN_CONFIG_TYPE(_config) (((_config) >> 8) & 0xff) | |
212 | #define CCN_CONFIG_EVENT(_config) (((_config) >> 16) & 0xff) | |
213 | #define CCN_CONFIG_PORT(_config) (((_config) >> 24) & 0x3) | |
90d11e26 | 214 | #define CCN_CONFIG_BUS(_config) (((_config) >> 24) & 0x3) |
a33b0daa PM |
215 | #define CCN_CONFIG_VC(_config) (((_config) >> 26) & 0x7) |
216 | #define CCN_CONFIG_DIR(_config) (((_config) >> 29) & 0x1) | |
217 | #define CCN_CONFIG_MASK(_config) (((_config) >> 30) & 0xf) | |
218 | ||
219 | static void arm_ccn_pmu_config_set(u64 *config, u32 node_xp, u32 type, u32 port) | |
220 | { | |
a18f8e97 | 221 | *config &= ~((0xff << 0) | (0xff << 8) | (0x3 << 24)); |
a33b0daa PM |
222 | *config |= (node_xp << 0) | (type << 8) | (port << 24); |
223 | } | |
224 | ||
225 | static ssize_t arm_ccn_pmu_format_show(struct device *dev, | |
226 | struct device_attribute *attr, char *buf) | |
227 | { | |
228 | struct dev_ext_attribute *ea = container_of(attr, | |
229 | struct dev_ext_attribute, attr); | |
230 | ||
231 | return snprintf(buf, PAGE_SIZE, "%s\n", (char *)ea->var); | |
232 | } | |
233 | ||
234 | #define CCN_FORMAT_ATTR(_name, _config) \ | |
235 | struct dev_ext_attribute arm_ccn_pmu_format_attr_##_name = \ | |
236 | { __ATTR(_name, S_IRUGO, arm_ccn_pmu_format_show, \ | |
237 | NULL), _config } | |
238 | ||
239 | static CCN_FORMAT_ATTR(node, "config:0-7"); | |
240 | static CCN_FORMAT_ATTR(xp, "config:0-7"); | |
241 | static CCN_FORMAT_ATTR(type, "config:8-15"); | |
242 | static CCN_FORMAT_ATTR(event, "config:16-23"); | |
243 | static CCN_FORMAT_ATTR(port, "config:24-25"); | |
90d11e26 | 244 | static CCN_FORMAT_ATTR(bus, "config:24-25"); |
a33b0daa PM |
245 | static CCN_FORMAT_ATTR(vc, "config:26-28"); |
246 | static CCN_FORMAT_ATTR(dir, "config:29-29"); | |
247 | static CCN_FORMAT_ATTR(mask, "config:30-33"); | |
248 | static CCN_FORMAT_ATTR(cmp_l, "config1:0-62"); | |
249 | static CCN_FORMAT_ATTR(cmp_h, "config2:0-59"); | |
250 | ||
251 | static struct attribute *arm_ccn_pmu_format_attrs[] = { | |
252 | &arm_ccn_pmu_format_attr_node.attr.attr, | |
253 | &arm_ccn_pmu_format_attr_xp.attr.attr, | |
254 | &arm_ccn_pmu_format_attr_type.attr.attr, | |
255 | &arm_ccn_pmu_format_attr_event.attr.attr, | |
256 | &arm_ccn_pmu_format_attr_port.attr.attr, | |
90d11e26 | 257 | &arm_ccn_pmu_format_attr_bus.attr.attr, |
a33b0daa PM |
258 | &arm_ccn_pmu_format_attr_vc.attr.attr, |
259 | &arm_ccn_pmu_format_attr_dir.attr.attr, | |
260 | &arm_ccn_pmu_format_attr_mask.attr.attr, | |
261 | &arm_ccn_pmu_format_attr_cmp_l.attr.attr, | |
262 | &arm_ccn_pmu_format_attr_cmp_h.attr.attr, | |
263 | NULL | |
264 | }; | |
265 | ||
8a84bf45 | 266 | static const struct attribute_group arm_ccn_pmu_format_attr_group = { |
a33b0daa PM |
267 | .name = "format", |
268 | .attrs = arm_ccn_pmu_format_attrs, | |
269 | }; | |
270 | ||
271 | ||
272 | struct arm_ccn_pmu_event { | |
273 | struct device_attribute attr; | |
274 | u32 type; | |
275 | u32 event; | |
276 | int num_ports; | |
277 | int num_vcs; | |
278 | const char *def; | |
279 | int mask; | |
280 | }; | |
281 | ||
282 | #define CCN_EVENT_ATTR(_name) \ | |
283 | __ATTR(_name, S_IRUGO, arm_ccn_pmu_event_show, NULL) | |
284 | ||
285 | /* | |
286 | * Events defined in TRM for MN, HN-I and SBSX are actually watchpoints set on | |
287 | * their ports in XP they are connected to. For the sake of usability they are | |
288 | * explicitly defined here (and translated into a relevant watchpoint in | |
289 | * arm_ccn_pmu_event_init()) so the user can easily request them without deep | |
290 | * knowledge of the flit format. | |
291 | */ | |
292 | ||
293 | #define CCN_EVENT_MN(_name, _def, _mask) { .attr = CCN_EVENT_ATTR(mn_##_name), \ | |
294 | .type = CCN_TYPE_MN, .event = CCN_EVENT_WATCHPOINT, \ | |
295 | .num_ports = CCN_NUM_XP_PORTS, .num_vcs = CCN_NUM_VCS, \ | |
296 | .def = _def, .mask = _mask, } | |
297 | ||
298 | #define CCN_EVENT_HNI(_name, _def, _mask) { \ | |
299 | .attr = CCN_EVENT_ATTR(hni_##_name), .type = CCN_TYPE_HNI, \ | |
300 | .event = CCN_EVENT_WATCHPOINT, .num_ports = CCN_NUM_XP_PORTS, \ | |
301 | .num_vcs = CCN_NUM_VCS, .def = _def, .mask = _mask, } | |
302 | ||
303 | #define CCN_EVENT_SBSX(_name, _def, _mask) { \ | |
304 | .attr = CCN_EVENT_ATTR(sbsx_##_name), .type = CCN_TYPE_SBSX, \ | |
305 | .event = CCN_EVENT_WATCHPOINT, .num_ports = CCN_NUM_XP_PORTS, \ | |
306 | .num_vcs = CCN_NUM_VCS, .def = _def, .mask = _mask, } | |
307 | ||
308 | #define CCN_EVENT_HNF(_name, _event) { .attr = CCN_EVENT_ATTR(hnf_##_name), \ | |
309 | .type = CCN_TYPE_HNF, .event = _event, } | |
310 | ||
311 | #define CCN_EVENT_XP(_name, _event) { .attr = CCN_EVENT_ATTR(xp_##_name), \ | |
312 | .type = CCN_TYPE_XP, .event = _event, \ | |
313 | .num_ports = CCN_NUM_XP_PORTS, .num_vcs = CCN_NUM_VCS, } | |
314 | ||
315 | /* | |
316 | * RN-I & RN-D (RN-D = RN-I + DVM) nodes have different type ID depending | |
317 | * on configuration. One of them is picked to represent the whole group, | |
318 | * as they all share the same event types. | |
319 | */ | |
320 | #define CCN_EVENT_RNI(_name, _event) { .attr = CCN_EVENT_ATTR(rni_##_name), \ | |
321 | .type = CCN_TYPE_RNI_3P, .event = _event, } | |
322 | ||
323 | #define CCN_EVENT_SBAS(_name, _event) { .attr = CCN_EVENT_ATTR(sbas_##_name), \ | |
324 | .type = CCN_TYPE_SBAS, .event = _event, } | |
325 | ||
326 | #define CCN_EVENT_CYCLES(_name) { .attr = CCN_EVENT_ATTR(_name), \ | |
327 | .type = CCN_TYPE_CYCLES } | |
328 | ||
329 | ||
330 | static ssize_t arm_ccn_pmu_event_show(struct device *dev, | |
331 | struct device_attribute *attr, char *buf) | |
332 | { | |
4e486cba | 333 | struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev)); |
a33b0daa PM |
334 | struct arm_ccn_pmu_event *event = container_of(attr, |
335 | struct arm_ccn_pmu_event, attr); | |
336 | ssize_t res; | |
337 | ||
338 | res = snprintf(buf, PAGE_SIZE, "type=0x%x", event->type); | |
339 | if (event->event) | |
340 | res += snprintf(buf + res, PAGE_SIZE - res, ",event=0x%x", | |
341 | event->event); | |
342 | if (event->def) | |
343 | res += snprintf(buf + res, PAGE_SIZE - res, ",%s", | |
344 | event->def); | |
345 | if (event->mask) | |
346 | res += snprintf(buf + res, PAGE_SIZE - res, ",mask=0x%x", | |
347 | event->mask); | |
8f06c51f PM |
348 | |
349 | /* Arguments required by an event */ | |
350 | switch (event->type) { | |
351 | case CCN_TYPE_CYCLES: | |
352 | break; | |
353 | case CCN_TYPE_XP: | |
354 | res += snprintf(buf + res, PAGE_SIZE - res, | |
90d11e26 | 355 | ",xp=?,vc=?"); |
8f06c51f PM |
356 | if (event->event == CCN_EVENT_WATCHPOINT) |
357 | res += snprintf(buf + res, PAGE_SIZE - res, | |
90d11e26 PM |
358 | ",port=?,dir=?,cmp_l=?,cmp_h=?,mask=?"); |
359 | else | |
360 | res += snprintf(buf + res, PAGE_SIZE - res, | |
361 | ",bus=?"); | |
362 | ||
8f06c51f | 363 | break; |
4e486cba PM |
364 | case CCN_TYPE_MN: |
365 | res += snprintf(buf + res, PAGE_SIZE - res, ",node=%d", ccn->mn_id); | |
366 | break; | |
8f06c51f PM |
367 | default: |
368 | res += snprintf(buf + res, PAGE_SIZE - res, ",node=?"); | |
369 | break; | |
370 | } | |
371 | ||
a33b0daa PM |
372 | res += snprintf(buf + res, PAGE_SIZE - res, "\n"); |
373 | ||
374 | return res; | |
375 | } | |
376 | ||
377 | static umode_t arm_ccn_pmu_events_is_visible(struct kobject *kobj, | |
378 | struct attribute *attr, int index) | |
379 | { | |
380 | struct device *dev = kobj_to_dev(kobj); | |
381 | struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev)); | |
382 | struct device_attribute *dev_attr = container_of(attr, | |
383 | struct device_attribute, attr); | |
384 | struct arm_ccn_pmu_event *event = container_of(dev_attr, | |
385 | struct arm_ccn_pmu_event, attr); | |
386 | ||
387 | if (event->type == CCN_TYPE_SBAS && !ccn->sbas_present) | |
388 | return 0; | |
389 | if (event->type == CCN_TYPE_SBSX && !ccn->sbsx_present) | |
390 | return 0; | |
391 | ||
392 | return attr->mode; | |
393 | } | |
394 | ||
395 | static struct arm_ccn_pmu_event arm_ccn_pmu_events[] = { | |
4e486cba PM |
396 | CCN_EVENT_MN(eobarrier, "dir=1,vc=0,cmp_h=0x1c00", CCN_IDX_MASK_OPCODE), |
397 | CCN_EVENT_MN(ecbarrier, "dir=1,vc=0,cmp_h=0x1e00", CCN_IDX_MASK_OPCODE), | |
398 | CCN_EVENT_MN(dvmop, "dir=1,vc=0,cmp_h=0x2800", CCN_IDX_MASK_OPCODE), | |
a33b0daa PM |
399 | CCN_EVENT_HNI(txdatflits, "dir=1,vc=3", CCN_IDX_MASK_ANY), |
400 | CCN_EVENT_HNI(rxdatflits, "dir=0,vc=3", CCN_IDX_MASK_ANY), | |
401 | CCN_EVENT_HNI(txreqflits, "dir=1,vc=0", CCN_IDX_MASK_ANY), | |
402 | CCN_EVENT_HNI(rxreqflits, "dir=0,vc=0", CCN_IDX_MASK_ANY), | |
403 | CCN_EVENT_HNI(rxreqflits_order, "dir=0,vc=0,cmp_h=0x8000", | |
404 | CCN_IDX_MASK_ORDER), | |
405 | CCN_EVENT_SBSX(txdatflits, "dir=1,vc=3", CCN_IDX_MASK_ANY), | |
406 | CCN_EVENT_SBSX(rxdatflits, "dir=0,vc=3", CCN_IDX_MASK_ANY), | |
407 | CCN_EVENT_SBSX(txreqflits, "dir=1,vc=0", CCN_IDX_MASK_ANY), | |
408 | CCN_EVENT_SBSX(rxreqflits, "dir=0,vc=0", CCN_IDX_MASK_ANY), | |
409 | CCN_EVENT_SBSX(rxreqflits_order, "dir=0,vc=0,cmp_h=0x8000", | |
410 | CCN_IDX_MASK_ORDER), | |
411 | CCN_EVENT_HNF(cache_miss, 0x1), | |
412 | CCN_EVENT_HNF(l3_sf_cache_access, 0x02), | |
413 | CCN_EVENT_HNF(cache_fill, 0x3), | |
414 | CCN_EVENT_HNF(pocq_retry, 0x4), | |
415 | CCN_EVENT_HNF(pocq_reqs_recvd, 0x5), | |
416 | CCN_EVENT_HNF(sf_hit, 0x6), | |
417 | CCN_EVENT_HNF(sf_evictions, 0x7), | |
418 | CCN_EVENT_HNF(snoops_sent, 0x8), | |
419 | CCN_EVENT_HNF(snoops_broadcast, 0x9), | |
420 | CCN_EVENT_HNF(l3_eviction, 0xa), | |
421 | CCN_EVENT_HNF(l3_fill_invalid_way, 0xb), | |
422 | CCN_EVENT_HNF(mc_retries, 0xc), | |
423 | CCN_EVENT_HNF(mc_reqs, 0xd), | |
424 | CCN_EVENT_HNF(qos_hh_retry, 0xe), | |
425 | CCN_EVENT_RNI(rdata_beats_p0, 0x1), | |
426 | CCN_EVENT_RNI(rdata_beats_p1, 0x2), | |
427 | CCN_EVENT_RNI(rdata_beats_p2, 0x3), | |
428 | CCN_EVENT_RNI(rxdat_flits, 0x4), | |
429 | CCN_EVENT_RNI(txdat_flits, 0x5), | |
430 | CCN_EVENT_RNI(txreq_flits, 0x6), | |
431 | CCN_EVENT_RNI(txreq_flits_retried, 0x7), | |
432 | CCN_EVENT_RNI(rrt_full, 0x8), | |
433 | CCN_EVENT_RNI(wrt_full, 0x9), | |
434 | CCN_EVENT_RNI(txreq_flits_replayed, 0xa), | |
435 | CCN_EVENT_XP(upload_starvation, 0x1), | |
436 | CCN_EVENT_XP(download_starvation, 0x2), | |
437 | CCN_EVENT_XP(respin, 0x3), | |
438 | CCN_EVENT_XP(valid_flit, 0x4), | |
439 | CCN_EVENT_XP(watchpoint, CCN_EVENT_WATCHPOINT), | |
440 | CCN_EVENT_SBAS(rdata_beats_p0, 0x1), | |
441 | CCN_EVENT_SBAS(rxdat_flits, 0x4), | |
442 | CCN_EVENT_SBAS(txdat_flits, 0x5), | |
443 | CCN_EVENT_SBAS(txreq_flits, 0x6), | |
444 | CCN_EVENT_SBAS(txreq_flits_retried, 0x7), | |
445 | CCN_EVENT_SBAS(rrt_full, 0x8), | |
446 | CCN_EVENT_SBAS(wrt_full, 0x9), | |
447 | CCN_EVENT_SBAS(txreq_flits_replayed, 0xa), | |
448 | CCN_EVENT_CYCLES(cycles), | |
449 | }; | |
450 | ||
451 | /* Populated in arm_ccn_init() */ | |
452 | static struct attribute | |
453 | *arm_ccn_pmu_events_attrs[ARRAY_SIZE(arm_ccn_pmu_events) + 1]; | |
454 | ||
8a84bf45 | 455 | static const struct attribute_group arm_ccn_pmu_events_attr_group = { |
a33b0daa PM |
456 | .name = "events", |
457 | .is_visible = arm_ccn_pmu_events_is_visible, | |
458 | .attrs = arm_ccn_pmu_events_attrs, | |
459 | }; | |
460 | ||
461 | ||
462 | static u64 *arm_ccn_pmu_get_cmp_mask(struct arm_ccn *ccn, const char *name) | |
463 | { | |
464 | unsigned long i; | |
465 | ||
466 | if (WARN_ON(!name || !name[0] || !isxdigit(name[0]) || !name[1])) | |
467 | return NULL; | |
468 | i = isdigit(name[0]) ? name[0] - '0' : 0xa + tolower(name[0]) - 'a'; | |
469 | ||
470 | switch (name[1]) { | |
471 | case 'l': | |
472 | return &ccn->dt.cmp_mask[i].l; | |
473 | case 'h': | |
474 | return &ccn->dt.cmp_mask[i].h; | |
475 | default: | |
476 | return NULL; | |
477 | } | |
478 | } | |
479 | ||
480 | static ssize_t arm_ccn_pmu_cmp_mask_show(struct device *dev, | |
481 | struct device_attribute *attr, char *buf) | |
482 | { | |
483 | struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev)); | |
484 | u64 *mask = arm_ccn_pmu_get_cmp_mask(ccn, attr->attr.name); | |
485 | ||
486 | return mask ? snprintf(buf, PAGE_SIZE, "0x%016llx\n", *mask) : -EINVAL; | |
487 | } | |
488 | ||
489 | static ssize_t arm_ccn_pmu_cmp_mask_store(struct device *dev, | |
490 | struct device_attribute *attr, const char *buf, size_t count) | |
491 | { | |
492 | struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev)); | |
493 | u64 *mask = arm_ccn_pmu_get_cmp_mask(ccn, attr->attr.name); | |
494 | int err = -EINVAL; | |
495 | ||
496 | if (mask) | |
497 | err = kstrtoull(buf, 0, mask); | |
498 | ||
499 | return err ? err : count; | |
500 | } | |
501 | ||
502 | #define CCN_CMP_MASK_ATTR(_name) \ | |
503 | struct device_attribute arm_ccn_pmu_cmp_mask_attr_##_name = \ | |
504 | __ATTR(_name, S_IRUGO | S_IWUSR, \ | |
505 | arm_ccn_pmu_cmp_mask_show, arm_ccn_pmu_cmp_mask_store) | |
506 | ||
507 | #define CCN_CMP_MASK_ATTR_RO(_name) \ | |
508 | struct device_attribute arm_ccn_pmu_cmp_mask_attr_##_name = \ | |
509 | __ATTR(_name, S_IRUGO, arm_ccn_pmu_cmp_mask_show, NULL) | |
510 | ||
511 | static CCN_CMP_MASK_ATTR(0l); | |
512 | static CCN_CMP_MASK_ATTR(0h); | |
513 | static CCN_CMP_MASK_ATTR(1l); | |
514 | static CCN_CMP_MASK_ATTR(1h); | |
515 | static CCN_CMP_MASK_ATTR(2l); | |
516 | static CCN_CMP_MASK_ATTR(2h); | |
517 | static CCN_CMP_MASK_ATTR(3l); | |
518 | static CCN_CMP_MASK_ATTR(3h); | |
519 | static CCN_CMP_MASK_ATTR(4l); | |
520 | static CCN_CMP_MASK_ATTR(4h); | |
521 | static CCN_CMP_MASK_ATTR(5l); | |
522 | static CCN_CMP_MASK_ATTR(5h); | |
523 | static CCN_CMP_MASK_ATTR(6l); | |
524 | static CCN_CMP_MASK_ATTR(6h); | |
525 | static CCN_CMP_MASK_ATTR(7l); | |
526 | static CCN_CMP_MASK_ATTR(7h); | |
527 | static CCN_CMP_MASK_ATTR_RO(8l); | |
528 | static CCN_CMP_MASK_ATTR_RO(8h); | |
529 | static CCN_CMP_MASK_ATTR_RO(9l); | |
530 | static CCN_CMP_MASK_ATTR_RO(9h); | |
531 | static CCN_CMP_MASK_ATTR_RO(al); | |
532 | static CCN_CMP_MASK_ATTR_RO(ah); | |
533 | static CCN_CMP_MASK_ATTR_RO(bl); | |
534 | static CCN_CMP_MASK_ATTR_RO(bh); | |
535 | ||
536 | static struct attribute *arm_ccn_pmu_cmp_mask_attrs[] = { | |
537 | &arm_ccn_pmu_cmp_mask_attr_0l.attr, &arm_ccn_pmu_cmp_mask_attr_0h.attr, | |
538 | &arm_ccn_pmu_cmp_mask_attr_1l.attr, &arm_ccn_pmu_cmp_mask_attr_1h.attr, | |
539 | &arm_ccn_pmu_cmp_mask_attr_2l.attr, &arm_ccn_pmu_cmp_mask_attr_2h.attr, | |
540 | &arm_ccn_pmu_cmp_mask_attr_3l.attr, &arm_ccn_pmu_cmp_mask_attr_3h.attr, | |
541 | &arm_ccn_pmu_cmp_mask_attr_4l.attr, &arm_ccn_pmu_cmp_mask_attr_4h.attr, | |
542 | &arm_ccn_pmu_cmp_mask_attr_5l.attr, &arm_ccn_pmu_cmp_mask_attr_5h.attr, | |
543 | &arm_ccn_pmu_cmp_mask_attr_6l.attr, &arm_ccn_pmu_cmp_mask_attr_6h.attr, | |
544 | &arm_ccn_pmu_cmp_mask_attr_7l.attr, &arm_ccn_pmu_cmp_mask_attr_7h.attr, | |
545 | &arm_ccn_pmu_cmp_mask_attr_8l.attr, &arm_ccn_pmu_cmp_mask_attr_8h.attr, | |
546 | &arm_ccn_pmu_cmp_mask_attr_9l.attr, &arm_ccn_pmu_cmp_mask_attr_9h.attr, | |
547 | &arm_ccn_pmu_cmp_mask_attr_al.attr, &arm_ccn_pmu_cmp_mask_attr_ah.attr, | |
548 | &arm_ccn_pmu_cmp_mask_attr_bl.attr, &arm_ccn_pmu_cmp_mask_attr_bh.attr, | |
549 | NULL | |
550 | }; | |
551 | ||
8a84bf45 | 552 | static const struct attribute_group arm_ccn_pmu_cmp_mask_attr_group = { |
a33b0daa PM |
553 | .name = "cmp_mask", |
554 | .attrs = arm_ccn_pmu_cmp_mask_attrs, | |
555 | }; | |
556 | ||
ffa41524 PM |
557 | static ssize_t arm_ccn_pmu_cpumask_show(struct device *dev, |
558 | struct device_attribute *attr, char *buf) | |
559 | { | |
560 | struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev)); | |
561 | ||
562 | return cpumap_print_to_pagebuf(true, buf, &ccn->dt.cpu); | |
563 | } | |
564 | ||
565 | static struct device_attribute arm_ccn_pmu_cpumask_attr = | |
566 | __ATTR(cpumask, S_IRUGO, arm_ccn_pmu_cpumask_show, NULL); | |
567 | ||
568 | static struct attribute *arm_ccn_pmu_cpumask_attrs[] = { | |
569 | &arm_ccn_pmu_cpumask_attr.attr, | |
570 | NULL, | |
571 | }; | |
572 | ||
8a84bf45 | 573 | static const struct attribute_group arm_ccn_pmu_cpumask_attr_group = { |
ffa41524 PM |
574 | .attrs = arm_ccn_pmu_cpumask_attrs, |
575 | }; | |
a33b0daa PM |
576 | |
577 | /* | |
578 | * Default poll period is 10ms, which is way over the top anyway, | |
579 | * as in the worst case scenario (an event every cycle), with 1GHz | |
580 | * clocked bus, the smallest, 32 bit counter will overflow in | |
581 | * more than 4s. | |
582 | */ | |
583 | static unsigned int arm_ccn_pmu_poll_period_us = 10000; | |
584 | module_param_named(pmu_poll_period_us, arm_ccn_pmu_poll_period_us, uint, | |
585 | S_IRUGO | S_IWUSR); | |
586 | ||
587 | static ktime_t arm_ccn_pmu_timer_period(void) | |
588 | { | |
589 | return ns_to_ktime((u64)arm_ccn_pmu_poll_period_us * 1000); | |
590 | } | |
591 | ||
592 | ||
593 | static const struct attribute_group *arm_ccn_pmu_attr_groups[] = { | |
594 | &arm_ccn_pmu_events_attr_group, | |
595 | &arm_ccn_pmu_format_attr_group, | |
596 | &arm_ccn_pmu_cmp_mask_attr_group, | |
ffa41524 | 597 | &arm_ccn_pmu_cpumask_attr_group, |
a33b0daa PM |
598 | NULL |
599 | }; | |
600 | ||
601 | ||
602 | static int arm_ccn_pmu_alloc_bit(unsigned long *bitmap, unsigned long size) | |
603 | { | |
604 | int bit; | |
605 | ||
606 | do { | |
607 | bit = find_first_zero_bit(bitmap, size); | |
608 | if (bit >= size) | |
609 | return -EAGAIN; | |
610 | } while (test_and_set_bit(bit, bitmap)); | |
611 | ||
612 | return bit; | |
613 | } | |
614 | ||
615 | /* All RN-I and RN-D nodes have identical PMUs */ | |
616 | static int arm_ccn_pmu_type_eq(u32 a, u32 b) | |
617 | { | |
618 | if (a == b) | |
619 | return 1; | |
620 | ||
621 | switch (a) { | |
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 | switch (b) { | |
629 | case CCN_TYPE_RNI_1P: | |
630 | case CCN_TYPE_RNI_2P: | |
631 | case CCN_TYPE_RNI_3P: | |
632 | case CCN_TYPE_RND_1P: | |
633 | case CCN_TYPE_RND_2P: | |
634 | case CCN_TYPE_RND_3P: | |
635 | return 1; | |
636 | } | |
637 | break; | |
638 | } | |
639 | ||
640 | return 0; | |
641 | } | |
642 | ||
57006d3e PM |
643 | static int arm_ccn_pmu_event_alloc(struct perf_event *event) |
644 | { | |
645 | struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); | |
646 | struct hw_perf_event *hw = &event->hw; | |
647 | u32 node_xp, type, event_id; | |
648 | struct arm_ccn_component *source; | |
649 | int bit; | |
650 | ||
651 | node_xp = CCN_CONFIG_NODE(event->attr.config); | |
652 | type = CCN_CONFIG_TYPE(event->attr.config); | |
653 | event_id = CCN_CONFIG_EVENT(event->attr.config); | |
654 | ||
655 | /* Allocate the cycle counter */ | |
656 | if (type == CCN_TYPE_CYCLES) { | |
657 | if (test_and_set_bit(CCN_IDX_PMU_CYCLE_COUNTER, | |
658 | ccn->dt.pmu_counters_mask)) | |
659 | return -EAGAIN; | |
660 | ||
661 | hw->idx = CCN_IDX_PMU_CYCLE_COUNTER; | |
662 | ccn->dt.pmu_counters[CCN_IDX_PMU_CYCLE_COUNTER].event = event; | |
663 | ||
664 | return 0; | |
665 | } | |
666 | ||
667 | /* Allocate an event counter */ | |
668 | hw->idx = arm_ccn_pmu_alloc_bit(ccn->dt.pmu_counters_mask, | |
669 | CCN_NUM_PMU_EVENT_COUNTERS); | |
670 | if (hw->idx < 0) { | |
671 | dev_dbg(ccn->dev, "No more counters available!\n"); | |
672 | return -EAGAIN; | |
673 | } | |
674 | ||
675 | if (type == CCN_TYPE_XP) | |
676 | source = &ccn->xp[node_xp]; | |
677 | else | |
678 | source = &ccn->node[node_xp]; | |
679 | ccn->dt.pmu_counters[hw->idx].source = source; | |
680 | ||
681 | /* Allocate an event source or a watchpoint */ | |
682 | if (type == CCN_TYPE_XP && event_id == CCN_EVENT_WATCHPOINT) | |
683 | bit = arm_ccn_pmu_alloc_bit(source->xp.dt_cmp_mask, | |
684 | CCN_NUM_XP_WATCHPOINTS); | |
685 | else | |
686 | bit = arm_ccn_pmu_alloc_bit(source->pmu_events_mask, | |
687 | CCN_NUM_PMU_EVENTS); | |
688 | if (bit < 0) { | |
689 | dev_dbg(ccn->dev, "No more event sources/watchpoints on node/XP %d!\n", | |
690 | node_xp); | |
691 | clear_bit(hw->idx, ccn->dt.pmu_counters_mask); | |
692 | return -EAGAIN; | |
693 | } | |
694 | hw->config_base = bit; | |
695 | ||
696 | ccn->dt.pmu_counters[hw->idx].event = event; | |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
701 | static void arm_ccn_pmu_event_release(struct perf_event *event) | |
8fb22264 PM |
702 | { |
703 | struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); | |
704 | struct hw_perf_event *hw = &event->hw; | |
705 | ||
706 | if (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER) { | |
707 | clear_bit(CCN_IDX_PMU_CYCLE_COUNTER, ccn->dt.pmu_counters_mask); | |
708 | } else { | |
709 | struct arm_ccn_component *source = | |
710 | ccn->dt.pmu_counters[hw->idx].source; | |
711 | ||
712 | if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP && | |
713 | CCN_CONFIG_EVENT(event->attr.config) == | |
714 | CCN_EVENT_WATCHPOINT) | |
715 | clear_bit(hw->config_base, source->xp.dt_cmp_mask); | |
716 | else | |
717 | clear_bit(hw->config_base, source->pmu_events_mask); | |
718 | clear_bit(hw->idx, ccn->dt.pmu_counters_mask); | |
719 | } | |
720 | ||
721 | ccn->dt.pmu_counters[hw->idx].source = NULL; | |
722 | ccn->dt.pmu_counters[hw->idx].event = NULL; | |
723 | } | |
724 | ||
a33b0daa PM |
725 | static int arm_ccn_pmu_event_init(struct perf_event *event) |
726 | { | |
727 | struct arm_ccn *ccn; | |
728 | struct hw_perf_event *hw = &event->hw; | |
729 | u32 node_xp, type, event_id; | |
57006d3e | 730 | int valid; |
a33b0daa | 731 | int i; |
9ce1aa86 | 732 | struct perf_event *sibling; |
a33b0daa PM |
733 | |
734 | if (event->attr.type != event->pmu->type) | |
735 | return -ENOENT; | |
736 | ||
737 | ccn = pmu_to_arm_ccn(event->pmu); | |
738 | ||
739 | if (hw->sample_period) { | |
1898eb61 | 740 | dev_dbg(ccn->dev, "Sampling not supported!\n"); |
a33b0daa PM |
741 | return -EOPNOTSUPP; |
742 | } | |
743 | ||
30656398 | 744 | if (has_branch_stack(event)) { |
1898eb61 | 745 | dev_dbg(ccn->dev, "Can't exclude execution levels!\n"); |
3249bce4 | 746 | return -EINVAL; |
a33b0daa PM |
747 | } |
748 | ||
749 | if (event->cpu < 0) { | |
1898eb61 | 750 | dev_dbg(ccn->dev, "Can't provide per-task data!\n"); |
a33b0daa PM |
751 | return -EOPNOTSUPP; |
752 | } | |
ffa41524 PM |
753 | /* |
754 | * Many perf core operations (eg. events rotation) operate on a | |
755 | * single CPU context. This is obvious for CPU PMUs, where one | |
756 | * expects the same sets of events being observed on all CPUs, | |
757 | * but can lead to issues for off-core PMUs, like CCN, where each | |
758 | * event could be theoretically assigned to a different CPU. To | |
759 | * mitigate this, we enforce CPU assignment to one, selected | |
760 | * processor (the one described in the "cpumask" attribute). | |
761 | */ | |
762 | event->cpu = cpumask_first(&ccn->dt.cpu); | |
a33b0daa PM |
763 | |
764 | node_xp = CCN_CONFIG_NODE(event->attr.config); | |
765 | type = CCN_CONFIG_TYPE(event->attr.config); | |
766 | event_id = CCN_CONFIG_EVENT(event->attr.config); | |
767 | ||
768 | /* Validate node/xp vs topology */ | |
769 | switch (type) { | |
4e486cba PM |
770 | case CCN_TYPE_MN: |
771 | if (node_xp != ccn->mn_id) { | |
1898eb61 | 772 | dev_dbg(ccn->dev, "Invalid MN ID %d!\n", node_xp); |
4e486cba PM |
773 | return -EINVAL; |
774 | } | |
775 | break; | |
a33b0daa PM |
776 | case CCN_TYPE_XP: |
777 | if (node_xp >= ccn->num_xps) { | |
1898eb61 | 778 | dev_dbg(ccn->dev, "Invalid XP ID %d!\n", node_xp); |
a33b0daa PM |
779 | return -EINVAL; |
780 | } | |
781 | break; | |
782 | case CCN_TYPE_CYCLES: | |
783 | break; | |
784 | default: | |
785 | if (node_xp >= ccn->num_nodes) { | |
1898eb61 | 786 | dev_dbg(ccn->dev, "Invalid node ID %d!\n", node_xp); |
a33b0daa PM |
787 | return -EINVAL; |
788 | } | |
789 | if (!arm_ccn_pmu_type_eq(type, ccn->node[node_xp].type)) { | |
1898eb61 | 790 | dev_dbg(ccn->dev, "Invalid type 0x%x for node %d!\n", |
a33b0daa PM |
791 | type, node_xp); |
792 | return -EINVAL; | |
793 | } | |
794 | break; | |
795 | } | |
796 | ||
797 | /* Validate event ID vs available for the type */ | |
798 | for (i = 0, valid = 0; i < ARRAY_SIZE(arm_ccn_pmu_events) && !valid; | |
799 | i++) { | |
800 | struct arm_ccn_pmu_event *e = &arm_ccn_pmu_events[i]; | |
801 | u32 port = CCN_CONFIG_PORT(event->attr.config); | |
802 | u32 vc = CCN_CONFIG_VC(event->attr.config); | |
803 | ||
804 | if (!arm_ccn_pmu_type_eq(type, e->type)) | |
805 | continue; | |
806 | if (event_id != e->event) | |
807 | continue; | |
808 | if (e->num_ports && port >= e->num_ports) { | |
1898eb61 | 809 | dev_dbg(ccn->dev, "Invalid port %d for node/XP %d!\n", |
a33b0daa PM |
810 | port, node_xp); |
811 | return -EINVAL; | |
812 | } | |
813 | if (e->num_vcs && vc >= e->num_vcs) { | |
1898eb61 | 814 | dev_dbg(ccn->dev, "Invalid vc %d for node/XP %d!\n", |
bf87bb12 | 815 | vc, node_xp); |
a33b0daa PM |
816 | return -EINVAL; |
817 | } | |
818 | valid = 1; | |
819 | } | |
820 | if (!valid) { | |
1898eb61 | 821 | dev_dbg(ccn->dev, "Invalid event 0x%x for node/XP %d!\n", |
a33b0daa PM |
822 | event_id, node_xp); |
823 | return -EINVAL; | |
824 | } | |
825 | ||
826 | /* Watchpoint-based event for a node is actually set on XP */ | |
827 | if (event_id == CCN_EVENT_WATCHPOINT && type != CCN_TYPE_XP) { | |
828 | u32 port; | |
829 | ||
830 | type = CCN_TYPE_XP; | |
831 | port = arm_ccn_node_to_xp_port(node_xp); | |
832 | node_xp = arm_ccn_node_to_xp(node_xp); | |
833 | ||
834 | arm_ccn_pmu_config_set(&event->attr.config, | |
835 | node_xp, type, port); | |
836 | } | |
837 | ||
9ce1aa86 PM |
838 | /* |
839 | * We must NOT create groups containing mixed PMUs, although software | |
840 | * events are acceptable (for example to create a CCN group | |
841 | * periodically read when a hrtimer aka cpu-clock leader triggers). | |
842 | */ | |
843 | if (event->group_leader->pmu != event->pmu && | |
844 | !is_software_event(event->group_leader)) | |
845 | return -EINVAL; | |
846 | ||
edb39592 | 847 | for_each_sibling_event(sibling, event->group_leader) { |
9ce1aa86 PM |
848 | if (sibling->pmu != event->pmu && |
849 | !is_software_event(sibling)) | |
850 | return -EINVAL; | |
edb39592 | 851 | } |
9ce1aa86 | 852 | |
a33b0daa PM |
853 | return 0; |
854 | } | |
855 | ||
a33b0daa PM |
856 | static u64 arm_ccn_pmu_read_counter(struct arm_ccn *ccn, int idx) |
857 | { | |
858 | u64 res; | |
859 | ||
860 | if (idx == CCN_IDX_PMU_CYCLE_COUNTER) { | |
861 | #ifdef readq | |
862 | res = readq(ccn->dt.base + CCN_DT_PMCCNTR); | |
863 | #else | |
864 | /* 40 bit counter, can do snapshot and read in two parts */ | |
865 | writel(0x1, ccn->dt.base + CCN_DT_PMSR_REQ); | |
866 | while (!(readl(ccn->dt.base + CCN_DT_PMSR) & 0x1)) | |
867 | ; | |
868 | writel(0x1, ccn->dt.base + CCN_DT_PMSR_CLR); | |
869 | res = readl(ccn->dt.base + CCN_DT_PMCCNTRSR + 4) & 0xff; | |
870 | res <<= 32; | |
871 | res |= readl(ccn->dt.base + CCN_DT_PMCCNTRSR); | |
872 | #endif | |
873 | } else { | |
874 | res = readl(ccn->dt.base + CCN_DT_PMEVCNT(idx)); | |
875 | } | |
876 | ||
877 | return res; | |
878 | } | |
879 | ||
880 | static void arm_ccn_pmu_event_update(struct perf_event *event) | |
881 | { | |
882 | struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); | |
883 | struct hw_perf_event *hw = &event->hw; | |
884 | u64 prev_count, new_count, mask; | |
885 | ||
886 | do { | |
887 | prev_count = local64_read(&hw->prev_count); | |
888 | new_count = arm_ccn_pmu_read_counter(ccn, hw->idx); | |
889 | } while (local64_xchg(&hw->prev_count, new_count) != prev_count); | |
890 | ||
891 | mask = (1LLU << (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER ? 40 : 32)) - 1; | |
892 | ||
893 | local64_add((new_count - prev_count) & mask, &event->count); | |
894 | } | |
895 | ||
896 | static void arm_ccn_pmu_xp_dt_config(struct perf_event *event, int enable) | |
897 | { | |
898 | struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); | |
899 | struct hw_perf_event *hw = &event->hw; | |
900 | struct arm_ccn_component *xp; | |
901 | u32 val, dt_cfg; | |
902 | ||
b7c1beb2 PM |
903 | /* Nothing to do for cycle counter */ |
904 | if (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER) | |
905 | return; | |
906 | ||
a33b0daa PM |
907 | if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP) |
908 | xp = &ccn->xp[CCN_CONFIG_XP(event->attr.config)]; | |
909 | else | |
910 | xp = &ccn->xp[arm_ccn_node_to_xp( | |
911 | CCN_CONFIG_NODE(event->attr.config))]; | |
912 | ||
913 | if (enable) | |
914 | dt_cfg = hw->event_base; | |
915 | else | |
916 | dt_cfg = CCN_XP_DT_CONFIG__DT_CFG__PASS_THROUGH; | |
917 | ||
918 | spin_lock(&ccn->dt.config_lock); | |
919 | ||
920 | val = readl(xp->base + CCN_XP_DT_CONFIG); | |
921 | val &= ~(CCN_XP_DT_CONFIG__DT_CFG__MASK << | |
922 | CCN_XP_DT_CONFIG__DT_CFG__SHIFT(hw->idx)); | |
923 | val |= dt_cfg << CCN_XP_DT_CONFIG__DT_CFG__SHIFT(hw->idx); | |
924 | writel(val, xp->base + CCN_XP_DT_CONFIG); | |
925 | ||
926 | spin_unlock(&ccn->dt.config_lock); | |
927 | } | |
928 | ||
929 | static void arm_ccn_pmu_event_start(struct perf_event *event, int flags) | |
930 | { | |
931 | struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); | |
932 | struct hw_perf_event *hw = &event->hw; | |
933 | ||
934 | local64_set(&event->hw.prev_count, | |
935 | arm_ccn_pmu_read_counter(ccn, hw->idx)); | |
936 | hw->state = 0; | |
937 | ||
a33b0daa PM |
938 | /* Set the DT bus input, engaging the counter */ |
939 | arm_ccn_pmu_xp_dt_config(event, 1); | |
940 | } | |
941 | ||
942 | static void arm_ccn_pmu_event_stop(struct perf_event *event, int flags) | |
943 | { | |
a33b0daa | 944 | struct hw_perf_event *hw = &event->hw; |
a33b0daa PM |
945 | |
946 | /* Disable counting, setting the DT bus to pass-through mode */ | |
947 | arm_ccn_pmu_xp_dt_config(event, 0); | |
948 | ||
a33b0daa PM |
949 | if (flags & PERF_EF_UPDATE) |
950 | arm_ccn_pmu_event_update(event); | |
951 | ||
952 | hw->state |= PERF_HES_STOPPED; | |
953 | } | |
954 | ||
955 | static void arm_ccn_pmu_xp_watchpoint_config(struct perf_event *event) | |
956 | { | |
957 | struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); | |
958 | struct hw_perf_event *hw = &event->hw; | |
959 | struct arm_ccn_component *source = | |
960 | ccn->dt.pmu_counters[hw->idx].source; | |
961 | unsigned long wp = hw->config_base; | |
962 | u32 val; | |
963 | u64 cmp_l = event->attr.config1; | |
964 | u64 cmp_h = event->attr.config2; | |
965 | u64 mask_l = ccn->dt.cmp_mask[CCN_CONFIG_MASK(event->attr.config)].l; | |
966 | u64 mask_h = ccn->dt.cmp_mask[CCN_CONFIG_MASK(event->attr.config)].h; | |
967 | ||
968 | hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT(wp); | |
969 | ||
970 | /* Direction (RX/TX), device (port) & virtual channel */ | |
971 | val = readl(source->base + CCN_XP_DT_INTERFACE_SEL); | |
972 | val &= ~(CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__MASK << | |
973 | CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__SHIFT(wp)); | |
974 | val |= CCN_CONFIG_DIR(event->attr.config) << | |
975 | CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__SHIFT(wp); | |
976 | val &= ~(CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__MASK << | |
977 | CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__SHIFT(wp)); | |
978 | val |= CCN_CONFIG_PORT(event->attr.config) << | |
979 | CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__SHIFT(wp); | |
980 | val &= ~(CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__MASK << | |
981 | CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__SHIFT(wp)); | |
982 | val |= CCN_CONFIG_VC(event->attr.config) << | |
983 | CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__SHIFT(wp); | |
984 | writel(val, source->base + CCN_XP_DT_INTERFACE_SEL); | |
985 | ||
986 | /* Comparison values */ | |
987 | writel(cmp_l & 0xffffffff, source->base + CCN_XP_DT_CMP_VAL_L(wp)); | |
b928466b | 988 | writel((cmp_l >> 32) & 0x7fffffff, |
a33b0daa PM |
989 | source->base + CCN_XP_DT_CMP_VAL_L(wp) + 4); |
990 | writel(cmp_h & 0xffffffff, source->base + CCN_XP_DT_CMP_VAL_H(wp)); | |
991 | writel((cmp_h >> 32) & 0x0fffffff, | |
992 | source->base + CCN_XP_DT_CMP_VAL_H(wp) + 4); | |
993 | ||
994 | /* Mask */ | |
995 | writel(mask_l & 0xffffffff, source->base + CCN_XP_DT_CMP_MASK_L(wp)); | |
b928466b | 996 | writel((mask_l >> 32) & 0x7fffffff, |
a33b0daa PM |
997 | source->base + CCN_XP_DT_CMP_MASK_L(wp) + 4); |
998 | writel(mask_h & 0xffffffff, source->base + CCN_XP_DT_CMP_MASK_H(wp)); | |
999 | writel((mask_h >> 32) & 0x0fffffff, | |
1000 | source->base + CCN_XP_DT_CMP_MASK_H(wp) + 4); | |
1001 | } | |
1002 | ||
1003 | static void arm_ccn_pmu_xp_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 val, id; | |
1010 | ||
1011 | hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__XP_PMU_EVENT(hw->config_base); | |
1012 | ||
1013 | id = (CCN_CONFIG_VC(event->attr.config) << 4) | | |
90d11e26 | 1014 | (CCN_CONFIG_BUS(event->attr.config) << 3) | |
a33b0daa PM |
1015 | (CCN_CONFIG_EVENT(event->attr.config) << 0); |
1016 | ||
1017 | val = readl(source->base + CCN_XP_PMU_EVENT_SEL); | |
1018 | val &= ~(CCN_XP_PMU_EVENT_SEL__ID__MASK << | |
1019 | CCN_XP_PMU_EVENT_SEL__ID__SHIFT(hw->config_base)); | |
1020 | val |= id << CCN_XP_PMU_EVENT_SEL__ID__SHIFT(hw->config_base); | |
1021 | writel(val, source->base + CCN_XP_PMU_EVENT_SEL); | |
1022 | } | |
1023 | ||
1024 | static void arm_ccn_pmu_node_event_config(struct perf_event *event) | |
1025 | { | |
1026 | struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); | |
1027 | struct hw_perf_event *hw = &event->hw; | |
1028 | struct arm_ccn_component *source = | |
1029 | ccn->dt.pmu_counters[hw->idx].source; | |
1030 | u32 type = CCN_CONFIG_TYPE(event->attr.config); | |
1031 | u32 val, port; | |
1032 | ||
1033 | port = arm_ccn_node_to_xp_port(CCN_CONFIG_NODE(event->attr.config)); | |
1034 | hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__DEVICE_PMU_EVENT(port, | |
1035 | hw->config_base); | |
1036 | ||
1037 | /* These *_event_sel regs should be identical, but let's make sure... */ | |
1038 | BUILD_BUG_ON(CCN_HNF_PMU_EVENT_SEL != CCN_SBAS_PMU_EVENT_SEL); | |
1039 | BUILD_BUG_ON(CCN_SBAS_PMU_EVENT_SEL != CCN_RNI_PMU_EVENT_SEL); | |
1040 | BUILD_BUG_ON(CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(1) != | |
1041 | CCN_SBAS_PMU_EVENT_SEL__ID__SHIFT(1)); | |
1042 | BUILD_BUG_ON(CCN_SBAS_PMU_EVENT_SEL__ID__SHIFT(1) != | |
1043 | CCN_RNI_PMU_EVENT_SEL__ID__SHIFT(1)); | |
1044 | BUILD_BUG_ON(CCN_HNF_PMU_EVENT_SEL__ID__MASK != | |
1045 | CCN_SBAS_PMU_EVENT_SEL__ID__MASK); | |
1046 | BUILD_BUG_ON(CCN_SBAS_PMU_EVENT_SEL__ID__MASK != | |
1047 | CCN_RNI_PMU_EVENT_SEL__ID__MASK); | |
1048 | if (WARN_ON(type != CCN_TYPE_HNF && type != CCN_TYPE_SBAS && | |
1049 | !arm_ccn_pmu_type_eq(type, CCN_TYPE_RNI_3P))) | |
1050 | return; | |
1051 | ||
1052 | /* Set the event id for the pre-allocated counter */ | |
1053 | val = readl(source->base + CCN_HNF_PMU_EVENT_SEL); | |
1054 | val &= ~(CCN_HNF_PMU_EVENT_SEL__ID__MASK << | |
1055 | CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(hw->config_base)); | |
1056 | val |= CCN_CONFIG_EVENT(event->attr.config) << | |
1057 | CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(hw->config_base); | |
1058 | writel(val, source->base + CCN_HNF_PMU_EVENT_SEL); | |
1059 | } | |
1060 | ||
1061 | static void arm_ccn_pmu_event_config(struct perf_event *event) | |
1062 | { | |
1063 | struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); | |
1064 | struct hw_perf_event *hw = &event->hw; | |
1065 | u32 xp, offset, val; | |
1066 | ||
1067 | /* Cycle counter requires no setup */ | |
1068 | if (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER) | |
1069 | return; | |
1070 | ||
1071 | if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP) | |
1072 | xp = CCN_CONFIG_XP(event->attr.config); | |
1073 | else | |
1074 | xp = arm_ccn_node_to_xp(CCN_CONFIG_NODE(event->attr.config)); | |
1075 | ||
1076 | spin_lock(&ccn->dt.config_lock); | |
1077 | ||
1078 | /* Set the DT bus "distance" register */ | |
1079 | offset = (hw->idx / 4) * 4; | |
1080 | val = readl(ccn->dt.base + CCN_DT_ACTIVE_DSM + offset); | |
1081 | val &= ~(CCN_DT_ACTIVE_DSM__DSM_ID__MASK << | |
1082 | CCN_DT_ACTIVE_DSM__DSM_ID__SHIFT(hw->idx % 4)); | |
1083 | val |= xp << CCN_DT_ACTIVE_DSM__DSM_ID__SHIFT(hw->idx % 4); | |
1084 | writel(val, ccn->dt.base + CCN_DT_ACTIVE_DSM + offset); | |
1085 | ||
1086 | if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP) { | |
1087 | if (CCN_CONFIG_EVENT(event->attr.config) == | |
1088 | CCN_EVENT_WATCHPOINT) | |
1089 | arm_ccn_pmu_xp_watchpoint_config(event); | |
1090 | else | |
1091 | arm_ccn_pmu_xp_event_config(event); | |
1092 | } else { | |
1093 | arm_ccn_pmu_node_event_config(event); | |
1094 | } | |
1095 | ||
1096 | spin_unlock(&ccn->dt.config_lock); | |
1097 | } | |
1098 | ||
5b1e01f3 MR |
1099 | static int arm_ccn_pmu_active_counters(struct arm_ccn *ccn) |
1100 | { | |
1101 | return bitmap_weight(ccn->dt.pmu_counters_mask, | |
1102 | CCN_NUM_PMU_EVENT_COUNTERS + 1); | |
1103 | } | |
1104 | ||
a33b0daa PM |
1105 | static int arm_ccn_pmu_event_add(struct perf_event *event, int flags) |
1106 | { | |
57006d3e | 1107 | int err; |
a33b0daa | 1108 | struct hw_perf_event *hw = &event->hw; |
5b1e01f3 | 1109 | struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); |
a33b0daa | 1110 | |
57006d3e PM |
1111 | err = arm_ccn_pmu_event_alloc(event); |
1112 | if (err) | |
1113 | return err; | |
1114 | ||
5b1e01f3 MR |
1115 | /* |
1116 | * Pin the timer, so that the overflows are handled by the chosen | |
1117 | * event->cpu (this is the same one as presented in "cpumask" | |
1118 | * attribute). | |
1119 | */ | |
1120 | if (!ccn->irq && arm_ccn_pmu_active_counters(ccn) == 1) | |
1121 | hrtimer_start(&ccn->dt.hrtimer, arm_ccn_pmu_timer_period(), | |
1122 | HRTIMER_MODE_REL_PINNED); | |
1123 | ||
a33b0daa PM |
1124 | arm_ccn_pmu_event_config(event); |
1125 | ||
1126 | hw->state = PERF_HES_STOPPED; | |
1127 | ||
1128 | if (flags & PERF_EF_START) | |
1129 | arm_ccn_pmu_event_start(event, PERF_EF_UPDATE); | |
1130 | ||
1131 | return 0; | |
1132 | } | |
1133 | ||
1134 | static void arm_ccn_pmu_event_del(struct perf_event *event, int flags) | |
1135 | { | |
5b1e01f3 MR |
1136 | struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); |
1137 | ||
a33b0daa | 1138 | arm_ccn_pmu_event_stop(event, PERF_EF_UPDATE); |
57006d3e PM |
1139 | |
1140 | arm_ccn_pmu_event_release(event); | |
5b1e01f3 MR |
1141 | |
1142 | if (!ccn->irq && arm_ccn_pmu_active_counters(ccn) == 0) | |
1143 | hrtimer_cancel(&ccn->dt.hrtimer); | |
a33b0daa PM |
1144 | } |
1145 | ||
1146 | static void arm_ccn_pmu_event_read(struct perf_event *event) | |
1147 | { | |
1148 | arm_ccn_pmu_event_update(event); | |
1149 | } | |
1150 | ||
d662ed2e MR |
1151 | static void arm_ccn_pmu_enable(struct pmu *pmu) |
1152 | { | |
1153 | struct arm_ccn *ccn = pmu_to_arm_ccn(pmu); | |
1154 | ||
1155 | u32 val = readl(ccn->dt.base + CCN_DT_PMCR); | |
1156 | val |= CCN_DT_PMCR__PMU_EN; | |
1157 | writel(val, ccn->dt.base + CCN_DT_PMCR); | |
1158 | } | |
1159 | ||
1160 | static void arm_ccn_pmu_disable(struct pmu *pmu) | |
1161 | { | |
1162 | struct arm_ccn *ccn = pmu_to_arm_ccn(pmu); | |
1163 | ||
1164 | u32 val = readl(ccn->dt.base + CCN_DT_PMCR); | |
1165 | val &= ~CCN_DT_PMCR__PMU_EN; | |
1166 | writel(val, ccn->dt.base + CCN_DT_PMCR); | |
1167 | } | |
1168 | ||
a33b0daa PM |
1169 | static irqreturn_t arm_ccn_pmu_overflow_handler(struct arm_ccn_dt *dt) |
1170 | { | |
1171 | u32 pmovsr = readl(dt->base + CCN_DT_PMOVSR); | |
1172 | int idx; | |
1173 | ||
1174 | if (!pmovsr) | |
1175 | return IRQ_NONE; | |
1176 | ||
1177 | writel(pmovsr, dt->base + CCN_DT_PMOVSR_CLR); | |
1178 | ||
1179 | BUILD_BUG_ON(CCN_IDX_PMU_CYCLE_COUNTER != CCN_NUM_PMU_EVENT_COUNTERS); | |
1180 | ||
1181 | for (idx = 0; idx < CCN_NUM_PMU_EVENT_COUNTERS + 1; idx++) { | |
1182 | struct perf_event *event = dt->pmu_counters[idx].event; | |
1183 | int overflowed = pmovsr & BIT(idx); | |
1184 | ||
fa637bf0 PM |
1185 | WARN_ON_ONCE(overflowed && !event && |
1186 | idx != CCN_IDX_PMU_CYCLE_COUNTER); | |
a33b0daa PM |
1187 | |
1188 | if (!event || !overflowed) | |
1189 | continue; | |
1190 | ||
1191 | arm_ccn_pmu_event_update(event); | |
1192 | } | |
1193 | ||
1194 | return IRQ_HANDLED; | |
1195 | } | |
1196 | ||
1197 | static enum hrtimer_restart arm_ccn_pmu_timer_handler(struct hrtimer *hrtimer) | |
1198 | { | |
1199 | struct arm_ccn_dt *dt = container_of(hrtimer, struct arm_ccn_dt, | |
1200 | hrtimer); | |
1201 | unsigned long flags; | |
1202 | ||
1203 | local_irq_save(flags); | |
1204 | arm_ccn_pmu_overflow_handler(dt); | |
1205 | local_irq_restore(flags); | |
1206 | ||
1207 | hrtimer_forward_now(hrtimer, arm_ccn_pmu_timer_period()); | |
1208 | return HRTIMER_RESTART; | |
1209 | } | |
1210 | ||
1211 | ||
8df03872 | 1212 | static int arm_ccn_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node) |
ffa41524 | 1213 | { |
8df03872 SAS |
1214 | struct arm_ccn_dt *dt = hlist_entry_safe(node, struct arm_ccn_dt, node); |
1215 | struct arm_ccn *ccn = container_of(dt, struct arm_ccn, dt); | |
ffa41524 PM |
1216 | unsigned int target; |
1217 | ||
8df03872 SAS |
1218 | if (!cpumask_test_and_clear_cpu(cpu, &dt->cpu)) |
1219 | return 0; | |
1220 | target = cpumask_any_but(cpu_online_mask, cpu); | |
1221 | if (target >= nr_cpu_ids) | |
1222 | return 0; | |
1223 | perf_pmu_migrate_context(&dt->pmu, cpu, target); | |
1224 | cpumask_set_cpu(target, &dt->cpu); | |
1225 | if (ccn->irq) | |
1226 | WARN_ON(irq_set_affinity_hint(ccn->irq, &dt->cpu) != 0); | |
fdc15a36 | 1227 | return 0; |
ffa41524 PM |
1228 | } |
1229 | ||
a33b0daa PM |
1230 | static DEFINE_IDA(arm_ccn_pmu_ida); |
1231 | ||
1232 | static int arm_ccn_pmu_init(struct arm_ccn *ccn) | |
1233 | { | |
1234 | int i; | |
1235 | char *name; | |
ffa41524 | 1236 | int err; |
a33b0daa PM |
1237 | |
1238 | /* Initialize DT subsystem */ | |
1239 | ccn->dt.base = ccn->base + CCN_REGION_SIZE; | |
1240 | spin_lock_init(&ccn->dt.config_lock); | |
fa637bf0 | 1241 | writel(CCN_DT_PMOVSR_CLR__MASK, ccn->dt.base + CCN_DT_PMOVSR_CLR); |
a33b0daa PM |
1242 | writel(CCN_DT_CTL__DT_EN, ccn->dt.base + CCN_DT_CTL); |
1243 | writel(CCN_DT_PMCR__OVFL_INTR_EN | CCN_DT_PMCR__PMU_EN, | |
1244 | ccn->dt.base + CCN_DT_PMCR); | |
1245 | writel(0x1, ccn->dt.base + CCN_DT_PMSR_CLR); | |
1246 | for (i = 0; i < ccn->num_xps; i++) { | |
1247 | writel(0, ccn->xp[i].base + CCN_XP_DT_CONFIG); | |
1248 | writel((CCN_XP_DT_CONTROL__WP_ARM_SEL__ALWAYS << | |
1249 | CCN_XP_DT_CONTROL__WP_ARM_SEL__SHIFT(0)) | | |
1250 | (CCN_XP_DT_CONTROL__WP_ARM_SEL__ALWAYS << | |
1251 | CCN_XP_DT_CONTROL__WP_ARM_SEL__SHIFT(1)) | | |
1252 | CCN_XP_DT_CONTROL__DT_ENABLE, | |
1253 | ccn->xp[i].base + CCN_XP_DT_CONTROL); | |
1254 | } | |
1255 | ccn->dt.cmp_mask[CCN_IDX_MASK_ANY].l = ~0; | |
1256 | ccn->dt.cmp_mask[CCN_IDX_MASK_ANY].h = ~0; | |
1257 | ccn->dt.cmp_mask[CCN_IDX_MASK_EXACT].l = 0; | |
1258 | ccn->dt.cmp_mask[CCN_IDX_MASK_EXACT].h = 0; | |
1259 | ccn->dt.cmp_mask[CCN_IDX_MASK_ORDER].l = ~0; | |
1260 | ccn->dt.cmp_mask[CCN_IDX_MASK_ORDER].h = ~(0x1 << 15); | |
1261 | ccn->dt.cmp_mask[CCN_IDX_MASK_OPCODE].l = ~0; | |
1262 | ccn->dt.cmp_mask[CCN_IDX_MASK_OPCODE].h = ~(0x1f << 9); | |
1263 | ||
1264 | /* Get a convenient /sys/event_source/devices/ name */ | |
1265 | ccn->dt.id = ida_simple_get(&arm_ccn_pmu_ida, 0, 0, GFP_KERNEL); | |
1266 | if (ccn->dt.id == 0) { | |
1267 | name = "ccn"; | |
1268 | } else { | |
0f9afd36 CJ |
1269 | name = devm_kasprintf(ccn->dev, GFP_KERNEL, "ccn_%d", |
1270 | ccn->dt.id); | |
24771179 CJ |
1271 | if (!name) { |
1272 | err = -ENOMEM; | |
1273 | goto error_choose_name; | |
1274 | } | |
a33b0daa PM |
1275 | } |
1276 | ||
1277 | /* Perf driver registration */ | |
1278 | ccn->dt.pmu = (struct pmu) { | |
c7f5828b | 1279 | .module = THIS_MODULE, |
a33b0daa PM |
1280 | .attr_groups = arm_ccn_pmu_attr_groups, |
1281 | .task_ctx_nr = perf_invalid_context, | |
1282 | .event_init = arm_ccn_pmu_event_init, | |
1283 | .add = arm_ccn_pmu_event_add, | |
1284 | .del = arm_ccn_pmu_event_del, | |
1285 | .start = arm_ccn_pmu_event_start, | |
1286 | .stop = arm_ccn_pmu_event_stop, | |
1287 | .read = arm_ccn_pmu_event_read, | |
d662ed2e MR |
1288 | .pmu_enable = arm_ccn_pmu_enable, |
1289 | .pmu_disable = arm_ccn_pmu_disable, | |
30656398 | 1290 | .capabilities = PERF_PMU_CAP_NO_EXCLUDE, |
a33b0daa PM |
1291 | }; |
1292 | ||
1293 | /* No overflow interrupt? Have to use a timer instead. */ | |
ffa41524 | 1294 | if (!ccn->irq) { |
a33b0daa PM |
1295 | dev_info(ccn->dev, "No access to interrupts, using timer.\n"); |
1296 | hrtimer_init(&ccn->dt.hrtimer, CLOCK_MONOTONIC, | |
1297 | HRTIMER_MODE_REL); | |
1298 | ccn->dt.hrtimer.function = arm_ccn_pmu_timer_handler; | |
1299 | } | |
1300 | ||
ffa41524 | 1301 | /* Pick one CPU which we will use to collect data from CCN... */ |
b18c2b94 | 1302 | cpumask_set_cpu(get_cpu(), &ccn->dt.cpu); |
ffa41524 | 1303 | |
ffa41524 PM |
1304 | /* Also make sure that the overflow interrupt is handled by this CPU */ |
1305 | if (ccn->irq) { | |
5420f9fd | 1306 | err = irq_set_affinity_hint(ccn->irq, &ccn->dt.cpu); |
ffa41524 PM |
1307 | if (err) { |
1308 | dev_err(ccn->dev, "Failed to set interrupt affinity!\n"); | |
1309 | goto error_set_affinity; | |
1310 | } | |
1311 | } | |
1312 | ||
1313 | err = perf_pmu_register(&ccn->dt.pmu, name, -1); | |
1314 | if (err) | |
1315 | goto error_pmu_register; | |
1316 | ||
8df03872 SAS |
1317 | cpuhp_state_add_instance_nocalls(CPUHP_AP_PERF_ARM_CCN_ONLINE, |
1318 | &ccn->dt.node); | |
b18c2b94 | 1319 | put_cpu(); |
ffa41524 PM |
1320 | return 0; |
1321 | ||
1322 | error_pmu_register: | |
1323 | error_set_affinity: | |
b18c2b94 | 1324 | put_cpu(); |
24771179 | 1325 | error_choose_name: |
ffa41524 PM |
1326 | ida_simple_remove(&arm_ccn_pmu_ida, ccn->dt.id); |
1327 | for (i = 0; i < ccn->num_xps; i++) | |
1328 | writel(0, ccn->xp[i].base + CCN_XP_DT_CONTROL); | |
1329 | writel(0, ccn->dt.base + CCN_DT_PMCR); | |
1330 | return err; | |
a33b0daa PM |
1331 | } |
1332 | ||
1333 | static void arm_ccn_pmu_cleanup(struct arm_ccn *ccn) | |
1334 | { | |
1335 | int i; | |
1336 | ||
8df03872 SAS |
1337 | cpuhp_state_remove_instance_nocalls(CPUHP_AP_PERF_ARM_CCN_ONLINE, |
1338 | &ccn->dt.node); | |
5420f9fd SP |
1339 | if (ccn->irq) |
1340 | irq_set_affinity_hint(ccn->irq, NULL); | |
a33b0daa PM |
1341 | for (i = 0; i < ccn->num_xps; i++) |
1342 | writel(0, ccn->xp[i].base + CCN_XP_DT_CONTROL); | |
1343 | writel(0, ccn->dt.base + CCN_DT_PMCR); | |
1344 | perf_pmu_unregister(&ccn->dt.pmu); | |
1345 | ida_simple_remove(&arm_ccn_pmu_ida, ccn->dt.id); | |
1346 | } | |
1347 | ||
a33b0daa PM |
1348 | static int arm_ccn_for_each_valid_region(struct arm_ccn *ccn, |
1349 | int (*callback)(struct arm_ccn *ccn, int region, | |
1350 | void __iomem *base, u32 type, u32 id)) | |
1351 | { | |
1352 | int region; | |
1353 | ||
1354 | for (region = 0; region < CCN_NUM_REGIONS; region++) { | |
1355 | u32 val, type, id; | |
1356 | void __iomem *base; | |
1357 | int err; | |
1358 | ||
1359 | val = readl(ccn->base + CCN_MN_OLY_COMP_LIST_63_0 + | |
1360 | 4 * (region / 32)); | |
1361 | if (!(val & (1 << (region % 32)))) | |
1362 | continue; | |
1363 | ||
1364 | base = ccn->base + region * CCN_REGION_SIZE; | |
1365 | val = readl(base + CCN_ALL_OLY_ID); | |
1366 | type = (val >> CCN_ALL_OLY_ID__OLY_ID__SHIFT) & | |
1367 | CCN_ALL_OLY_ID__OLY_ID__MASK; | |
1368 | id = (val >> CCN_ALL_OLY_ID__NODE_ID__SHIFT) & | |
1369 | CCN_ALL_OLY_ID__NODE_ID__MASK; | |
1370 | ||
1371 | err = callback(ccn, region, base, type, id); | |
1372 | if (err) | |
1373 | return err; | |
1374 | } | |
1375 | ||
1376 | return 0; | |
1377 | } | |
1378 | ||
1379 | static int arm_ccn_get_nodes_num(struct arm_ccn *ccn, int region, | |
1380 | void __iomem *base, u32 type, u32 id) | |
1381 | { | |
1382 | ||
1383 | if (type == CCN_TYPE_XP && id >= ccn->num_xps) | |
1384 | ccn->num_xps = id + 1; | |
1385 | else if (id >= ccn->num_nodes) | |
1386 | ccn->num_nodes = id + 1; | |
1387 | ||
1388 | return 0; | |
1389 | } | |
1390 | ||
1391 | static int arm_ccn_init_nodes(struct arm_ccn *ccn, int region, | |
1392 | void __iomem *base, u32 type, u32 id) | |
1393 | { | |
1394 | struct arm_ccn_component *component; | |
1395 | ||
1396 | dev_dbg(ccn->dev, "Region %d: id=%u, type=0x%02x\n", region, id, type); | |
1397 | ||
1398 | switch (type) { | |
1399 | case CCN_TYPE_MN: | |
4e486cba PM |
1400 | ccn->mn_id = id; |
1401 | return 0; | |
a33b0daa PM |
1402 | case CCN_TYPE_DT: |
1403 | return 0; | |
1404 | case CCN_TYPE_XP: | |
1405 | component = &ccn->xp[id]; | |
1406 | break; | |
1407 | case CCN_TYPE_SBSX: | |
1408 | ccn->sbsx_present = 1; | |
1409 | component = &ccn->node[id]; | |
1410 | break; | |
1411 | case CCN_TYPE_SBAS: | |
1412 | ccn->sbas_present = 1; | |
1413 | /* Fall-through */ | |
1414 | default: | |
1415 | component = &ccn->node[id]; | |
1416 | break; | |
1417 | } | |
1418 | ||
1419 | component->base = base; | |
1420 | component->type = type; | |
1421 | ||
1422 | return 0; | |
1423 | } | |
1424 | ||
1425 | ||
1426 | static irqreturn_t arm_ccn_error_handler(struct arm_ccn *ccn, | |
1427 | const u32 *err_sig_val) | |
1428 | { | |
1429 | /* This should be really handled by firmware... */ | |
1430 | dev_err(ccn->dev, "Error reported in %08x%08x%08x%08x%08x%08x.\n", | |
1431 | err_sig_val[5], err_sig_val[4], err_sig_val[3], | |
1432 | err_sig_val[2], err_sig_val[1], err_sig_val[0]); | |
1433 | dev_err(ccn->dev, "Disabling interrupt generation for all errors.\n"); | |
1434 | writel(CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLE, | |
1435 | ccn->base + CCN_MN_ERRINT_STATUS); | |
1436 | ||
1437 | return IRQ_HANDLED; | |
1438 | } | |
1439 | ||
1440 | ||
1441 | static irqreturn_t arm_ccn_irq_handler(int irq, void *dev_id) | |
1442 | { | |
1443 | irqreturn_t res = IRQ_NONE; | |
1444 | struct arm_ccn *ccn = dev_id; | |
1445 | u32 err_sig_val[6]; | |
1446 | u32 err_or; | |
1447 | int i; | |
1448 | ||
1449 | /* PMU overflow is a special case */ | |
1450 | err_or = err_sig_val[0] = readl(ccn->base + CCN_MN_ERR_SIG_VAL_63_0); | |
1451 | if (err_or & CCN_MN_ERR_SIG_VAL_63_0__DT) { | |
1452 | err_or &= ~CCN_MN_ERR_SIG_VAL_63_0__DT; | |
1453 | res = arm_ccn_pmu_overflow_handler(&ccn->dt); | |
1454 | } | |
1455 | ||
1456 | /* Have to read all err_sig_vals to clear them */ | |
1457 | for (i = 1; i < ARRAY_SIZE(err_sig_val); i++) { | |
1458 | err_sig_val[i] = readl(ccn->base + | |
1459 | CCN_MN_ERR_SIG_VAL_63_0 + i * 4); | |
1460 | err_or |= err_sig_val[i]; | |
1461 | } | |
1462 | if (err_or) | |
1463 | res |= arm_ccn_error_handler(ccn, err_sig_val); | |
1464 | ||
1465 | if (res != IRQ_NONE) | |
1466 | writel(CCN_MN_ERRINT_STATUS__INTREQ__DESSERT, | |
1467 | ccn->base + CCN_MN_ERRINT_STATUS); | |
1468 | ||
1469 | return res; | |
1470 | } | |
1471 | ||
1472 | ||
1473 | static int arm_ccn_probe(struct platform_device *pdev) | |
1474 | { | |
1475 | struct arm_ccn *ccn; | |
1476 | struct resource *res; | |
ffa41524 | 1477 | unsigned int irq; |
a33b0daa PM |
1478 | int err; |
1479 | ||
1480 | ccn = devm_kzalloc(&pdev->dev, sizeof(*ccn), GFP_KERNEL); | |
1481 | if (!ccn) | |
1482 | return -ENOMEM; | |
1483 | ccn->dev = &pdev->dev; | |
1484 | platform_set_drvdata(pdev, ccn); | |
1485 | ||
1486 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
809092dc SH |
1487 | ccn->base = devm_ioremap_resource(ccn->dev, res); |
1488 | if (IS_ERR(ccn->base)) | |
1489 | return PTR_ERR(ccn->base); | |
a33b0daa PM |
1490 | |
1491 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
1492 | if (!res) | |
1493 | return -EINVAL; | |
ffa41524 | 1494 | irq = res->start; |
a33b0daa PM |
1495 | |
1496 | /* Check if we can use the interrupt */ | |
1497 | writel(CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLE, | |
1498 | ccn->base + CCN_MN_ERRINT_STATUS); | |
1499 | if (readl(ccn->base + CCN_MN_ERRINT_STATUS) & | |
1500 | CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLED) { | |
1501 | /* Can set 'disable' bits, so can acknowledge interrupts */ | |
1502 | writel(CCN_MN_ERRINT_STATUS__PMU_EVENTS__ENABLE, | |
1503 | ccn->base + CCN_MN_ERRINT_STATUS); | |
0811ef7e MR |
1504 | err = devm_request_irq(ccn->dev, irq, arm_ccn_irq_handler, |
1505 | IRQF_NOBALANCING | IRQF_NO_THREAD, | |
1506 | dev_name(ccn->dev), ccn); | |
a33b0daa PM |
1507 | if (err) |
1508 | return err; | |
1509 | ||
ffa41524 | 1510 | ccn->irq = irq; |
a33b0daa PM |
1511 | } |
1512 | ||
1513 | ||
1514 | /* Build topology */ | |
1515 | ||
1516 | err = arm_ccn_for_each_valid_region(ccn, arm_ccn_get_nodes_num); | |
1517 | if (err) | |
1518 | return err; | |
1519 | ||
0a240c5b ME |
1520 | ccn->node = devm_kcalloc(ccn->dev, ccn->num_nodes, sizeof(*ccn->node), |
1521 | GFP_KERNEL); | |
1522 | ccn->xp = devm_kcalloc(ccn->dev, ccn->num_xps, sizeof(*ccn->node), | |
1523 | GFP_KERNEL); | |
a33b0daa PM |
1524 | if (!ccn->node || !ccn->xp) |
1525 | return -ENOMEM; | |
1526 | ||
1527 | err = arm_ccn_for_each_valid_region(ccn, arm_ccn_init_nodes); | |
1528 | if (err) | |
1529 | return err; | |
1530 | ||
1531 | return arm_ccn_pmu_init(ccn); | |
1532 | } | |
1533 | ||
1534 | static int arm_ccn_remove(struct platform_device *pdev) | |
1535 | { | |
1536 | struct arm_ccn *ccn = platform_get_drvdata(pdev); | |
1537 | ||
1538 | arm_ccn_pmu_cleanup(ccn); | |
1539 | ||
1540 | return 0; | |
1541 | } | |
1542 | ||
1543 | static const struct of_device_id arm_ccn_match[] = { | |
2941be21 | 1544 | { .compatible = "arm,ccn-502", }, |
a33b0daa PM |
1545 | { .compatible = "arm,ccn-504", }, |
1546 | {}, | |
1547 | }; | |
60aba820 | 1548 | MODULE_DEVICE_TABLE(of, arm_ccn_match); |
a33b0daa PM |
1549 | |
1550 | static struct platform_driver arm_ccn_driver = { | |
1551 | .driver = { | |
1552 | .name = "arm-ccn", | |
1553 | .of_match_table = arm_ccn_match, | |
1554 | }, | |
1555 | .probe = arm_ccn_probe, | |
1556 | .remove = arm_ccn_remove, | |
1557 | }; | |
1558 | ||
1559 | static int __init arm_ccn_init(void) | |
1560 | { | |
fdc15a36 SAS |
1561 | int i, ret; |
1562 | ||
8df03872 | 1563 | ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_CCN_ONLINE, |
73c1b41e | 1564 | "perf/arm/ccn:online", NULL, |
8df03872 | 1565 | arm_ccn_pmu_offline_cpu); |
fdc15a36 SAS |
1566 | if (ret) |
1567 | return ret; | |
a33b0daa PM |
1568 | |
1569 | for (i = 0; i < ARRAY_SIZE(arm_ccn_pmu_events); i++) | |
1570 | arm_ccn_pmu_events_attrs[i] = &arm_ccn_pmu_events[i].attr.attr; | |
1571 | ||
26242b33 TG |
1572 | ret = platform_driver_register(&arm_ccn_driver); |
1573 | if (ret) | |
1574 | cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_CCN_ONLINE); | |
1575 | return ret; | |
a33b0daa PM |
1576 | } |
1577 | ||
1578 | static void __exit arm_ccn_exit(void) | |
1579 | { | |
1580 | platform_driver_unregister(&arm_ccn_driver); | |
b69f63eb | 1581 | cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_CCN_ONLINE); |
a33b0daa PM |
1582 | } |
1583 | ||
1584 | module_init(arm_ccn_init); | |
1585 | module_exit(arm_ccn_exit); | |
1586 | ||
1587 | MODULE_AUTHOR("Pawel Moll <pawel.moll@arm.com>"); | |
75dc3441 | 1588 | MODULE_LICENSE("GPL v2"); |