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ACPI / fan: use acpi_device_xxx_power instead of acpi_bus equivelant
[linux-2.6-block.git] / drivers / bus / arm-ccn.c
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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>
20#include <linux/perf_event.h>
21#include <linux/platform_device.h>
22#include <linux/slab.h>
23
24#define CCN_NUM_XP_PORTS 2
25#define CCN_NUM_VCS 4
26#define CCN_NUM_REGIONS 256
27#define CCN_REGION_SIZE 0x10000
28
29#define CCN_ALL_OLY_ID 0xff00
30#define CCN_ALL_OLY_ID__OLY_ID__SHIFT 0
31#define CCN_ALL_OLY_ID__OLY_ID__MASK 0x1f
32#define CCN_ALL_OLY_ID__NODE_ID__SHIFT 8
33#define CCN_ALL_OLY_ID__NODE_ID__MASK 0x3f
34
35#define CCN_MN_ERRINT_STATUS 0x0008
36#define CCN_MN_ERRINT_STATUS__INTREQ__DESSERT 0x11
37#define CCN_MN_ERRINT_STATUS__ALL_ERRORS__ENABLE 0x02
38#define CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLED 0x20
39#define CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLE 0x22
40#define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_ENABLE 0x04
41#define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_DISABLED 0x40
42#define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_DISABLE 0x44
43#define CCN_MN_ERRINT_STATUS__PMU_EVENTS__ENABLE 0x08
44#define CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLED 0x80
45#define CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLE 0x88
46#define CCN_MN_OLY_COMP_LIST_63_0 0x01e0
47#define CCN_MN_ERR_SIG_VAL_63_0 0x0300
48#define CCN_MN_ERR_SIG_VAL_63_0__DT (1 << 1)
49
50#define CCN_DT_ACTIVE_DSM 0x0000
51#define CCN_DT_ACTIVE_DSM__DSM_ID__SHIFT(n) ((n) * 8)
52#define CCN_DT_ACTIVE_DSM__DSM_ID__MASK 0xff
53#define CCN_DT_CTL 0x0028
54#define CCN_DT_CTL__DT_EN (1 << 0)
55#define CCN_DT_PMEVCNT(n) (0x0100 + (n) * 0x8)
56#define CCN_DT_PMCCNTR 0x0140
57#define CCN_DT_PMCCNTRSR 0x0190
58#define CCN_DT_PMOVSR 0x0198
59#define CCN_DT_PMOVSR_CLR 0x01a0
60#define CCN_DT_PMCR 0x01a8
61#define CCN_DT_PMCR__OVFL_INTR_EN (1 << 6)
62#define CCN_DT_PMCR__PMU_EN (1 << 0)
63#define CCN_DT_PMSR 0x01b0
64#define CCN_DT_PMSR_REQ 0x01b8
65#define CCN_DT_PMSR_CLR 0x01c0
66
67#define CCN_HNF_PMU_EVENT_SEL 0x0600
68#define CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4)
69#define CCN_HNF_PMU_EVENT_SEL__ID__MASK 0xf
70
71#define CCN_XP_DT_CONFIG 0x0300
72#define CCN_XP_DT_CONFIG__DT_CFG__SHIFT(n) ((n) * 4)
73#define CCN_XP_DT_CONFIG__DT_CFG__MASK 0xf
74#define CCN_XP_DT_CONFIG__DT_CFG__PASS_THROUGH 0x0
75#define CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT_0_OR_1 0x1
76#define CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT(n) (0x2 + (n))
77#define CCN_XP_DT_CONFIG__DT_CFG__XP_PMU_EVENT(n) (0x4 + (n))
78#define CCN_XP_DT_CONFIG__DT_CFG__DEVICE_PMU_EVENT(d, n) (0x8 + (d) * 4 + (n))
79#define CCN_XP_DT_INTERFACE_SEL 0x0308
80#define CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__SHIFT(n) (0 + (n) * 8)
81#define CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__MASK 0x1
82#define CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__SHIFT(n) (1 + (n) * 8)
83#define CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__MASK 0x1
84#define CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__SHIFT(n) (2 + (n) * 8)
85#define CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__MASK 0x3
86#define CCN_XP_DT_CMP_VAL_L(n) (0x0310 + (n) * 0x40)
87#define CCN_XP_DT_CMP_VAL_H(n) (0x0318 + (n) * 0x40)
88#define CCN_XP_DT_CMP_MASK_L(n) (0x0320 + (n) * 0x40)
89#define CCN_XP_DT_CMP_MASK_H(n) (0x0328 + (n) * 0x40)
90#define CCN_XP_DT_CONTROL 0x0370
91#define CCN_XP_DT_CONTROL__DT_ENABLE (1 << 0)
92#define CCN_XP_DT_CONTROL__WP_ARM_SEL__SHIFT(n) (12 + (n) * 4)
93#define CCN_XP_DT_CONTROL__WP_ARM_SEL__MASK 0xf
94#define CCN_XP_DT_CONTROL__WP_ARM_SEL__ALWAYS 0xf
95#define CCN_XP_PMU_EVENT_SEL 0x0600
96#define CCN_XP_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 7)
97#define CCN_XP_PMU_EVENT_SEL__ID__MASK 0x3f
98
99#define CCN_SBAS_PMU_EVENT_SEL 0x0600
100#define CCN_SBAS_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4)
101#define CCN_SBAS_PMU_EVENT_SEL__ID__MASK 0xf
102
103#define CCN_RNI_PMU_EVENT_SEL 0x0600
104#define CCN_RNI_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4)
105#define CCN_RNI_PMU_EVENT_SEL__ID__MASK 0xf
106
107#define CCN_TYPE_MN 0x01
108#define CCN_TYPE_DT 0x02
109#define CCN_TYPE_HNF 0x04
110#define CCN_TYPE_HNI 0x05
111#define CCN_TYPE_XP 0x08
112#define CCN_TYPE_SBSX 0x0c
113#define CCN_TYPE_SBAS 0x10
114#define CCN_TYPE_RNI_1P 0x14
115#define CCN_TYPE_RNI_2P 0x15
116#define CCN_TYPE_RNI_3P 0x16
117#define CCN_TYPE_RND_1P 0x18 /* RN-D = RN-I + DVM */
118#define CCN_TYPE_RND_2P 0x19
119#define CCN_TYPE_RND_3P 0x1a
120#define CCN_TYPE_CYCLES 0xff /* Pseudotype */
121
122#define CCN_EVENT_WATCHPOINT 0xfe /* Pseudoevent */
123
124#define CCN_NUM_PMU_EVENTS 4
125#define CCN_NUM_XP_WATCHPOINTS 2 /* See DT.dbg_id.num_watchpoints */
126#define CCN_NUM_PMU_EVENT_COUNTERS 8 /* See DT.dbg_id.num_pmucntr */
127#define CCN_IDX_PMU_CYCLE_COUNTER CCN_NUM_PMU_EVENT_COUNTERS
128
129#define CCN_NUM_PREDEFINED_MASKS 4
130#define CCN_IDX_MASK_ANY (CCN_NUM_PMU_EVENT_COUNTERS + 0)
131#define CCN_IDX_MASK_EXACT (CCN_NUM_PMU_EVENT_COUNTERS + 1)
132#define CCN_IDX_MASK_ORDER (CCN_NUM_PMU_EVENT_COUNTERS + 2)
133#define CCN_IDX_MASK_OPCODE (CCN_NUM_PMU_EVENT_COUNTERS + 3)
134
135struct arm_ccn_component {
136 void __iomem *base;
137 u32 type;
138
139 DECLARE_BITMAP(pmu_events_mask, CCN_NUM_PMU_EVENTS);
140 union {
141 struct {
142 DECLARE_BITMAP(dt_cmp_mask, CCN_NUM_XP_WATCHPOINTS);
143 } xp;
144 };
145};
146
147#define pmu_to_arm_ccn(_pmu) container_of(container_of(_pmu, \
148 struct arm_ccn_dt, pmu), struct arm_ccn, dt)
149
150struct arm_ccn_dt {
151 int id;
152 void __iomem *base;
153
154 spinlock_t config_lock;
155
156 DECLARE_BITMAP(pmu_counters_mask, CCN_NUM_PMU_EVENT_COUNTERS + 1);
157 struct {
158 struct arm_ccn_component *source;
159 struct perf_event *event;
160 } pmu_counters[CCN_NUM_PMU_EVENT_COUNTERS + 1];
161
162 struct {
163 u64 l, h;
164 } cmp_mask[CCN_NUM_PMU_EVENT_COUNTERS + CCN_NUM_PREDEFINED_MASKS];
165
166 struct hrtimer hrtimer;
167
168 struct pmu pmu;
169};
170
171struct arm_ccn {
172 struct device *dev;
173 void __iomem *base;
174 unsigned irq_used:1;
175 unsigned sbas_present:1;
176 unsigned sbsx_present:1;
177
178 int num_nodes;
179 struct arm_ccn_component *node;
180
181 int num_xps;
182 struct arm_ccn_component *xp;
183
184 struct arm_ccn_dt dt;
185};
186
187
188static int arm_ccn_node_to_xp(int node)
189{
190 return node / CCN_NUM_XP_PORTS;
191}
192
193static int arm_ccn_node_to_xp_port(int node)
194{
195 return node % CCN_NUM_XP_PORTS;
196}
197
198
199/*
200 * Bit shifts and masks in these defines must be kept in sync with
201 * arm_ccn_pmu_config_set() and CCN_FORMAT_ATTRs below!
202 */
203#define CCN_CONFIG_NODE(_config) (((_config) >> 0) & 0xff)
204#define CCN_CONFIG_XP(_config) (((_config) >> 0) & 0xff)
205#define CCN_CONFIG_TYPE(_config) (((_config) >> 8) & 0xff)
206#define CCN_CONFIG_EVENT(_config) (((_config) >> 16) & 0xff)
207#define CCN_CONFIG_PORT(_config) (((_config) >> 24) & 0x3)
208#define CCN_CONFIG_VC(_config) (((_config) >> 26) & 0x7)
209#define CCN_CONFIG_DIR(_config) (((_config) >> 29) & 0x1)
210#define CCN_CONFIG_MASK(_config) (((_config) >> 30) & 0xf)
211
212static void arm_ccn_pmu_config_set(u64 *config, u32 node_xp, u32 type, u32 port)
213{
214 *config &= ~((0xff << 0) | (0xff << 8) | (0xff << 24));
215 *config |= (node_xp << 0) | (type << 8) | (port << 24);
216}
217
218static ssize_t arm_ccn_pmu_format_show(struct device *dev,
219 struct device_attribute *attr, char *buf)
220{
221 struct dev_ext_attribute *ea = container_of(attr,
222 struct dev_ext_attribute, attr);
223
224 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)ea->var);
225}
226
227#define CCN_FORMAT_ATTR(_name, _config) \
228 struct dev_ext_attribute arm_ccn_pmu_format_attr_##_name = \
229 { __ATTR(_name, S_IRUGO, arm_ccn_pmu_format_show, \
230 NULL), _config }
231
232static CCN_FORMAT_ATTR(node, "config:0-7");
233static CCN_FORMAT_ATTR(xp, "config:0-7");
234static CCN_FORMAT_ATTR(type, "config:8-15");
235static CCN_FORMAT_ATTR(event, "config:16-23");
236static CCN_FORMAT_ATTR(port, "config:24-25");
237static CCN_FORMAT_ATTR(vc, "config:26-28");
238static CCN_FORMAT_ATTR(dir, "config:29-29");
239static CCN_FORMAT_ATTR(mask, "config:30-33");
240static CCN_FORMAT_ATTR(cmp_l, "config1:0-62");
241static CCN_FORMAT_ATTR(cmp_h, "config2:0-59");
242
243static struct attribute *arm_ccn_pmu_format_attrs[] = {
244 &arm_ccn_pmu_format_attr_node.attr.attr,
245 &arm_ccn_pmu_format_attr_xp.attr.attr,
246 &arm_ccn_pmu_format_attr_type.attr.attr,
247 &arm_ccn_pmu_format_attr_event.attr.attr,
248 &arm_ccn_pmu_format_attr_port.attr.attr,
249 &arm_ccn_pmu_format_attr_vc.attr.attr,
250 &arm_ccn_pmu_format_attr_dir.attr.attr,
251 &arm_ccn_pmu_format_attr_mask.attr.attr,
252 &arm_ccn_pmu_format_attr_cmp_l.attr.attr,
253 &arm_ccn_pmu_format_attr_cmp_h.attr.attr,
254 NULL
255};
256
257static struct attribute_group arm_ccn_pmu_format_attr_group = {
258 .name = "format",
259 .attrs = arm_ccn_pmu_format_attrs,
260};
261
262
263struct arm_ccn_pmu_event {
264 struct device_attribute attr;
265 u32 type;
266 u32 event;
267 int num_ports;
268 int num_vcs;
269 const char *def;
270 int mask;
271};
272
273#define CCN_EVENT_ATTR(_name) \
274 __ATTR(_name, S_IRUGO, arm_ccn_pmu_event_show, NULL)
275
276/*
277 * Events defined in TRM for MN, HN-I and SBSX are actually watchpoints set on
278 * their ports in XP they are connected to. For the sake of usability they are
279 * explicitly defined here (and translated into a relevant watchpoint in
280 * arm_ccn_pmu_event_init()) so the user can easily request them without deep
281 * knowledge of the flit format.
282 */
283
284#define CCN_EVENT_MN(_name, _def, _mask) { .attr = CCN_EVENT_ATTR(mn_##_name), \
285 .type = CCN_TYPE_MN, .event = CCN_EVENT_WATCHPOINT, \
286 .num_ports = CCN_NUM_XP_PORTS, .num_vcs = CCN_NUM_VCS, \
287 .def = _def, .mask = _mask, }
288
289#define CCN_EVENT_HNI(_name, _def, _mask) { \
290 .attr = CCN_EVENT_ATTR(hni_##_name), .type = CCN_TYPE_HNI, \
291 .event = CCN_EVENT_WATCHPOINT, .num_ports = CCN_NUM_XP_PORTS, \
292 .num_vcs = CCN_NUM_VCS, .def = _def, .mask = _mask, }
293
294#define CCN_EVENT_SBSX(_name, _def, _mask) { \
295 .attr = CCN_EVENT_ATTR(sbsx_##_name), .type = CCN_TYPE_SBSX, \
296 .event = CCN_EVENT_WATCHPOINT, .num_ports = CCN_NUM_XP_PORTS, \
297 .num_vcs = CCN_NUM_VCS, .def = _def, .mask = _mask, }
298
299#define CCN_EVENT_HNF(_name, _event) { .attr = CCN_EVENT_ATTR(hnf_##_name), \
300 .type = CCN_TYPE_HNF, .event = _event, }
301
302#define CCN_EVENT_XP(_name, _event) { .attr = CCN_EVENT_ATTR(xp_##_name), \
303 .type = CCN_TYPE_XP, .event = _event, \
304 .num_ports = CCN_NUM_XP_PORTS, .num_vcs = CCN_NUM_VCS, }
305
306/*
307 * RN-I & RN-D (RN-D = RN-I + DVM) nodes have different type ID depending
308 * on configuration. One of them is picked to represent the whole group,
309 * as they all share the same event types.
310 */
311#define CCN_EVENT_RNI(_name, _event) { .attr = CCN_EVENT_ATTR(rni_##_name), \
312 .type = CCN_TYPE_RNI_3P, .event = _event, }
313
314#define CCN_EVENT_SBAS(_name, _event) { .attr = CCN_EVENT_ATTR(sbas_##_name), \
315 .type = CCN_TYPE_SBAS, .event = _event, }
316
317#define CCN_EVENT_CYCLES(_name) { .attr = CCN_EVENT_ATTR(_name), \
318 .type = CCN_TYPE_CYCLES }
319
320
321static ssize_t arm_ccn_pmu_event_show(struct device *dev,
322 struct device_attribute *attr, char *buf)
323{
324 struct arm_ccn_pmu_event *event = container_of(attr,
325 struct arm_ccn_pmu_event, attr);
326 ssize_t res;
327
328 res = snprintf(buf, PAGE_SIZE, "type=0x%x", event->type);
329 if (event->event)
330 res += snprintf(buf + res, PAGE_SIZE - res, ",event=0x%x",
331 event->event);
332 if (event->def)
333 res += snprintf(buf + res, PAGE_SIZE - res, ",%s",
334 event->def);
335 if (event->mask)
336 res += snprintf(buf + res, PAGE_SIZE - res, ",mask=0x%x",
337 event->mask);
338 res += snprintf(buf + res, PAGE_SIZE - res, "\n");
339
340 return res;
341}
342
343static umode_t arm_ccn_pmu_events_is_visible(struct kobject *kobj,
344 struct attribute *attr, int index)
345{
346 struct device *dev = kobj_to_dev(kobj);
347 struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));
348 struct device_attribute *dev_attr = container_of(attr,
349 struct device_attribute, attr);
350 struct arm_ccn_pmu_event *event = container_of(dev_attr,
351 struct arm_ccn_pmu_event, attr);
352
353 if (event->type == CCN_TYPE_SBAS && !ccn->sbas_present)
354 return 0;
355 if (event->type == CCN_TYPE_SBSX && !ccn->sbsx_present)
356 return 0;
357
358 return attr->mode;
359}
360
361static struct arm_ccn_pmu_event arm_ccn_pmu_events[] = {
362 CCN_EVENT_MN(eobarrier, "dir=0,vc=0,cmp_h=0x1c00", CCN_IDX_MASK_OPCODE),
363 CCN_EVENT_MN(ecbarrier, "dir=0,vc=0,cmp_h=0x1e00", CCN_IDX_MASK_OPCODE),
364 CCN_EVENT_MN(dvmop, "dir=0,vc=0,cmp_h=0x2800", CCN_IDX_MASK_OPCODE),
365 CCN_EVENT_HNI(txdatflits, "dir=1,vc=3", CCN_IDX_MASK_ANY),
366 CCN_EVENT_HNI(rxdatflits, "dir=0,vc=3", CCN_IDX_MASK_ANY),
367 CCN_EVENT_HNI(txreqflits, "dir=1,vc=0", CCN_IDX_MASK_ANY),
368 CCN_EVENT_HNI(rxreqflits, "dir=0,vc=0", CCN_IDX_MASK_ANY),
369 CCN_EVENT_HNI(rxreqflits_order, "dir=0,vc=0,cmp_h=0x8000",
370 CCN_IDX_MASK_ORDER),
371 CCN_EVENT_SBSX(txdatflits, "dir=1,vc=3", CCN_IDX_MASK_ANY),
372 CCN_EVENT_SBSX(rxdatflits, "dir=0,vc=3", CCN_IDX_MASK_ANY),
373 CCN_EVENT_SBSX(txreqflits, "dir=1,vc=0", CCN_IDX_MASK_ANY),
374 CCN_EVENT_SBSX(rxreqflits, "dir=0,vc=0", CCN_IDX_MASK_ANY),
375 CCN_EVENT_SBSX(rxreqflits_order, "dir=0,vc=0,cmp_h=0x8000",
376 CCN_IDX_MASK_ORDER),
377 CCN_EVENT_HNF(cache_miss, 0x1),
378 CCN_EVENT_HNF(l3_sf_cache_access, 0x02),
379 CCN_EVENT_HNF(cache_fill, 0x3),
380 CCN_EVENT_HNF(pocq_retry, 0x4),
381 CCN_EVENT_HNF(pocq_reqs_recvd, 0x5),
382 CCN_EVENT_HNF(sf_hit, 0x6),
383 CCN_EVENT_HNF(sf_evictions, 0x7),
384 CCN_EVENT_HNF(snoops_sent, 0x8),
385 CCN_EVENT_HNF(snoops_broadcast, 0x9),
386 CCN_EVENT_HNF(l3_eviction, 0xa),
387 CCN_EVENT_HNF(l3_fill_invalid_way, 0xb),
388 CCN_EVENT_HNF(mc_retries, 0xc),
389 CCN_EVENT_HNF(mc_reqs, 0xd),
390 CCN_EVENT_HNF(qos_hh_retry, 0xe),
391 CCN_EVENT_RNI(rdata_beats_p0, 0x1),
392 CCN_EVENT_RNI(rdata_beats_p1, 0x2),
393 CCN_EVENT_RNI(rdata_beats_p2, 0x3),
394 CCN_EVENT_RNI(rxdat_flits, 0x4),
395 CCN_EVENT_RNI(txdat_flits, 0x5),
396 CCN_EVENT_RNI(txreq_flits, 0x6),
397 CCN_EVENT_RNI(txreq_flits_retried, 0x7),
398 CCN_EVENT_RNI(rrt_full, 0x8),
399 CCN_EVENT_RNI(wrt_full, 0x9),
400 CCN_EVENT_RNI(txreq_flits_replayed, 0xa),
401 CCN_EVENT_XP(upload_starvation, 0x1),
402 CCN_EVENT_XP(download_starvation, 0x2),
403 CCN_EVENT_XP(respin, 0x3),
404 CCN_EVENT_XP(valid_flit, 0x4),
405 CCN_EVENT_XP(watchpoint, CCN_EVENT_WATCHPOINT),
406 CCN_EVENT_SBAS(rdata_beats_p0, 0x1),
407 CCN_EVENT_SBAS(rxdat_flits, 0x4),
408 CCN_EVENT_SBAS(txdat_flits, 0x5),
409 CCN_EVENT_SBAS(txreq_flits, 0x6),
410 CCN_EVENT_SBAS(txreq_flits_retried, 0x7),
411 CCN_EVENT_SBAS(rrt_full, 0x8),
412 CCN_EVENT_SBAS(wrt_full, 0x9),
413 CCN_EVENT_SBAS(txreq_flits_replayed, 0xa),
414 CCN_EVENT_CYCLES(cycles),
415};
416
417/* Populated in arm_ccn_init() */
418static struct attribute
419 *arm_ccn_pmu_events_attrs[ARRAY_SIZE(arm_ccn_pmu_events) + 1];
420
421static struct attribute_group arm_ccn_pmu_events_attr_group = {
422 .name = "events",
423 .is_visible = arm_ccn_pmu_events_is_visible,
424 .attrs = arm_ccn_pmu_events_attrs,
425};
426
427
428static u64 *arm_ccn_pmu_get_cmp_mask(struct arm_ccn *ccn, const char *name)
429{
430 unsigned long i;
431
432 if (WARN_ON(!name || !name[0] || !isxdigit(name[0]) || !name[1]))
433 return NULL;
434 i = isdigit(name[0]) ? name[0] - '0' : 0xa + tolower(name[0]) - 'a';
435
436 switch (name[1]) {
437 case 'l':
438 return &ccn->dt.cmp_mask[i].l;
439 case 'h':
440 return &ccn->dt.cmp_mask[i].h;
441 default:
442 return NULL;
443 }
444}
445
446static ssize_t arm_ccn_pmu_cmp_mask_show(struct device *dev,
447 struct device_attribute *attr, char *buf)
448{
449 struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));
450 u64 *mask = arm_ccn_pmu_get_cmp_mask(ccn, attr->attr.name);
451
452 return mask ? snprintf(buf, PAGE_SIZE, "0x%016llx\n", *mask) : -EINVAL;
453}
454
455static ssize_t arm_ccn_pmu_cmp_mask_store(struct device *dev,
456 struct device_attribute *attr, const char *buf, size_t count)
457{
458 struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));
459 u64 *mask = arm_ccn_pmu_get_cmp_mask(ccn, attr->attr.name);
460 int err = -EINVAL;
461
462 if (mask)
463 err = kstrtoull(buf, 0, mask);
464
465 return err ? err : count;
466}
467
468#define CCN_CMP_MASK_ATTR(_name) \
469 struct device_attribute arm_ccn_pmu_cmp_mask_attr_##_name = \
470 __ATTR(_name, S_IRUGO | S_IWUSR, \
471 arm_ccn_pmu_cmp_mask_show, arm_ccn_pmu_cmp_mask_store)
472
473#define CCN_CMP_MASK_ATTR_RO(_name) \
474 struct device_attribute arm_ccn_pmu_cmp_mask_attr_##_name = \
475 __ATTR(_name, S_IRUGO, arm_ccn_pmu_cmp_mask_show, NULL)
476
477static CCN_CMP_MASK_ATTR(0l);
478static CCN_CMP_MASK_ATTR(0h);
479static CCN_CMP_MASK_ATTR(1l);
480static CCN_CMP_MASK_ATTR(1h);
481static CCN_CMP_MASK_ATTR(2l);
482static CCN_CMP_MASK_ATTR(2h);
483static CCN_CMP_MASK_ATTR(3l);
484static CCN_CMP_MASK_ATTR(3h);
485static CCN_CMP_MASK_ATTR(4l);
486static CCN_CMP_MASK_ATTR(4h);
487static CCN_CMP_MASK_ATTR(5l);
488static CCN_CMP_MASK_ATTR(5h);
489static CCN_CMP_MASK_ATTR(6l);
490static CCN_CMP_MASK_ATTR(6h);
491static CCN_CMP_MASK_ATTR(7l);
492static CCN_CMP_MASK_ATTR(7h);
493static CCN_CMP_MASK_ATTR_RO(8l);
494static CCN_CMP_MASK_ATTR_RO(8h);
495static CCN_CMP_MASK_ATTR_RO(9l);
496static CCN_CMP_MASK_ATTR_RO(9h);
497static CCN_CMP_MASK_ATTR_RO(al);
498static CCN_CMP_MASK_ATTR_RO(ah);
499static CCN_CMP_MASK_ATTR_RO(bl);
500static CCN_CMP_MASK_ATTR_RO(bh);
501
502static struct attribute *arm_ccn_pmu_cmp_mask_attrs[] = {
503 &arm_ccn_pmu_cmp_mask_attr_0l.attr, &arm_ccn_pmu_cmp_mask_attr_0h.attr,
504 &arm_ccn_pmu_cmp_mask_attr_1l.attr, &arm_ccn_pmu_cmp_mask_attr_1h.attr,
505 &arm_ccn_pmu_cmp_mask_attr_2l.attr, &arm_ccn_pmu_cmp_mask_attr_2h.attr,
506 &arm_ccn_pmu_cmp_mask_attr_3l.attr, &arm_ccn_pmu_cmp_mask_attr_3h.attr,
507 &arm_ccn_pmu_cmp_mask_attr_4l.attr, &arm_ccn_pmu_cmp_mask_attr_4h.attr,
508 &arm_ccn_pmu_cmp_mask_attr_5l.attr, &arm_ccn_pmu_cmp_mask_attr_5h.attr,
509 &arm_ccn_pmu_cmp_mask_attr_6l.attr, &arm_ccn_pmu_cmp_mask_attr_6h.attr,
510 &arm_ccn_pmu_cmp_mask_attr_7l.attr, &arm_ccn_pmu_cmp_mask_attr_7h.attr,
511 &arm_ccn_pmu_cmp_mask_attr_8l.attr, &arm_ccn_pmu_cmp_mask_attr_8h.attr,
512 &arm_ccn_pmu_cmp_mask_attr_9l.attr, &arm_ccn_pmu_cmp_mask_attr_9h.attr,
513 &arm_ccn_pmu_cmp_mask_attr_al.attr, &arm_ccn_pmu_cmp_mask_attr_ah.attr,
514 &arm_ccn_pmu_cmp_mask_attr_bl.attr, &arm_ccn_pmu_cmp_mask_attr_bh.attr,
515 NULL
516};
517
518static struct attribute_group arm_ccn_pmu_cmp_mask_attr_group = {
519 .name = "cmp_mask",
520 .attrs = arm_ccn_pmu_cmp_mask_attrs,
521};
522
523
524/*
525 * Default poll period is 10ms, which is way over the top anyway,
526 * as in the worst case scenario (an event every cycle), with 1GHz
527 * clocked bus, the smallest, 32 bit counter will overflow in
528 * more than 4s.
529 */
530static unsigned int arm_ccn_pmu_poll_period_us = 10000;
531module_param_named(pmu_poll_period_us, arm_ccn_pmu_poll_period_us, uint,
532 S_IRUGO | S_IWUSR);
533
534static ktime_t arm_ccn_pmu_timer_period(void)
535{
536 return ns_to_ktime((u64)arm_ccn_pmu_poll_period_us * 1000);
537}
538
539
540static const struct attribute_group *arm_ccn_pmu_attr_groups[] = {
541 &arm_ccn_pmu_events_attr_group,
542 &arm_ccn_pmu_format_attr_group,
543 &arm_ccn_pmu_cmp_mask_attr_group,
544 NULL
545};
546
547
548static int arm_ccn_pmu_alloc_bit(unsigned long *bitmap, unsigned long size)
549{
550 int bit;
551
552 do {
553 bit = find_first_zero_bit(bitmap, size);
554 if (bit >= size)
555 return -EAGAIN;
556 } while (test_and_set_bit(bit, bitmap));
557
558 return bit;
559}
560
561/* All RN-I and RN-D nodes have identical PMUs */
562static int arm_ccn_pmu_type_eq(u32 a, u32 b)
563{
564 if (a == b)
565 return 1;
566
567 switch (a) {
568 case CCN_TYPE_RNI_1P:
569 case CCN_TYPE_RNI_2P:
570 case CCN_TYPE_RNI_3P:
571 case CCN_TYPE_RND_1P:
572 case CCN_TYPE_RND_2P:
573 case CCN_TYPE_RND_3P:
574 switch (b) {
575 case CCN_TYPE_RNI_1P:
576 case CCN_TYPE_RNI_2P:
577 case CCN_TYPE_RNI_3P:
578 case CCN_TYPE_RND_1P:
579 case CCN_TYPE_RND_2P:
580 case CCN_TYPE_RND_3P:
581 return 1;
582 }
583 break;
584 }
585
586 return 0;
587}
588
589static int arm_ccn_pmu_event_init(struct perf_event *event)
590{
591 struct arm_ccn *ccn;
592 struct hw_perf_event *hw = &event->hw;
593 u32 node_xp, type, event_id;
3e528cb7 594 int valid, bit;
a33b0daa
PM		 595 struct arm_ccn_component *source;
596 int i;
597
598 if (event->attr.type != event->pmu->type)
599 return -ENOENT;
600
601 ccn = pmu_to_arm_ccn(event->pmu);
602
603 if (hw->sample_period) {
604 dev_warn(ccn->dev, "Sampling not supported!\n");
605 return -EOPNOTSUPP;
606 }
607
608 if (has_branch_stack(event) || event->attr.exclude_user ||
609 event->attr.exclude_kernel || event->attr.exclude_hv ||
610 event->attr.exclude_idle) {
611 dev_warn(ccn->dev, "Can't exclude execution levels!\n");
612 return -EOPNOTSUPP;
613 }
614
615 if (event->cpu < 0) {
616 dev_warn(ccn->dev, "Can't provide per-task data!\n");
617 return -EOPNOTSUPP;
618 }
619
620 node_xp = CCN_CONFIG_NODE(event->attr.config);
621 type = CCN_CONFIG_TYPE(event->attr.config);
622 event_id = CCN_CONFIG_EVENT(event->attr.config);
623
624 /* Validate node/xp vs topology */
625 switch (type) {
626 case CCN_TYPE_XP:
627 if (node_xp >= ccn->num_xps) {
628 dev_warn(ccn->dev, "Invalid XP ID %d!\n", node_xp);
629 return -EINVAL;
630 }
631 break;
632 case CCN_TYPE_CYCLES:
633 break;
634 default:
635 if (node_xp >= ccn->num_nodes) {
636 dev_warn(ccn->dev, "Invalid node ID %d!\n", node_xp);
637 return -EINVAL;
638 }
639 if (!arm_ccn_pmu_type_eq(type, ccn->node[node_xp].type)) {
640 dev_warn(ccn->dev, "Invalid type 0x%x for node %d!\n",
641 type, node_xp);
642 return -EINVAL;
643 }
644 break;
645 }
646
647 /* Validate event ID vs available for the type */
648 for (i = 0, valid = 0; i < ARRAY_SIZE(arm_ccn_pmu_events) && !valid;
649 i++) {
650 struct arm_ccn_pmu_event *e = &arm_ccn_pmu_events[i];
651 u32 port = CCN_CONFIG_PORT(event->attr.config);
652 u32 vc = CCN_CONFIG_VC(event->attr.config);
653
654 if (!arm_ccn_pmu_type_eq(type, e->type))
655 continue;
656 if (event_id != e->event)
657 continue;
658 if (e->num_ports && port >= e->num_ports) {
659 dev_warn(ccn->dev, "Invalid port %d for node/XP %d!\n",
660 port, node_xp);
661 return -EINVAL;
662 }
663 if (e->num_vcs && vc >= e->num_vcs) {
664 dev_warn(ccn->dev, "Invalid vc %d for node/XP %d!\n",
bf87bb12 665 vc, node_xp);
a33b0daa
PM		 666 return -EINVAL;
667 }
668 valid = 1;
669 }
670 if (!valid) {
671 dev_warn(ccn->dev, "Invalid event 0x%x for node/XP %d!\n",
672 event_id, node_xp);
673 return -EINVAL;
674 }
675
676 /* Watchpoint-based event for a node is actually set on XP */
677 if (event_id == CCN_EVENT_WATCHPOINT && type != CCN_TYPE_XP) {
678 u32 port;
679
680 type = CCN_TYPE_XP;
681 port = arm_ccn_node_to_xp_port(node_xp);
682 node_xp = arm_ccn_node_to_xp(node_xp);
683
684 arm_ccn_pmu_config_set(&event->attr.config,
685 node_xp, type, port);
686 }
687
688 /* Allocate the cycle counter */
689 if (type == CCN_TYPE_CYCLES) {
690 if (test_and_set_bit(CCN_IDX_PMU_CYCLE_COUNTER,
691 ccn->dt.pmu_counters_mask))
692 return -EAGAIN;
693
694 hw->idx = CCN_IDX_PMU_CYCLE_COUNTER;
695 ccn->dt.pmu_counters[CCN_IDX_PMU_CYCLE_COUNTER].event = event;
696
697 return 0;
698 }
699
700 /* Allocate an event counter */
701 hw->idx = arm_ccn_pmu_alloc_bit(ccn->dt.pmu_counters_mask,
702 CCN_NUM_PMU_EVENT_COUNTERS);
703 if (hw->idx < 0) {
704 dev_warn(ccn->dev, "No more counters available!\n");
705 return -EAGAIN;
706 }
707
708 if (type == CCN_TYPE_XP)
709 source = &ccn->xp[node_xp];
710 else
711 source = &ccn->node[node_xp];
712 ccn->dt.pmu_counters[hw->idx].source = source;
713
714 /* Allocate an event source or a watchpoint */
715 if (type == CCN_TYPE_XP && event_id == CCN_EVENT_WATCHPOINT)
3e528cb7 716 bit = arm_ccn_pmu_alloc_bit(source->xp.dt_cmp_mask,
a33b0daa
PM		 717 CCN_NUM_XP_WATCHPOINTS);
718 else
3e528cb7 719 bit = arm_ccn_pmu_alloc_bit(source->pmu_events_mask,
a33b0daa 720 CCN_NUM_PMU_EVENTS);
3e528cb7 721 if (bit < 0) {
a33b0daa
PM		 722 dev_warn(ccn->dev, "No more event sources/watchpoints on node/XP %d!\n",
723 node_xp);
724 clear_bit(hw->idx, ccn->dt.pmu_counters_mask);
725 return -EAGAIN;
726 }
3e528cb7 727 hw->config_base = bit;
a33b0daa
PM		 728
729 ccn->dt.pmu_counters[hw->idx].event = event;
730
731 return 0;
732}
733
734static void arm_ccn_pmu_event_free(struct perf_event *event)
735{
736 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
737 struct hw_perf_event *hw = &event->hw;
738
739 if (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER) {
740 clear_bit(CCN_IDX_PMU_CYCLE_COUNTER, ccn->dt.pmu_counters_mask);
741 } else {
742 struct arm_ccn_component *source =
743 ccn->dt.pmu_counters[hw->idx].source;
744
745 if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP &&
746 CCN_CONFIG_EVENT(event->attr.config) ==
747 CCN_EVENT_WATCHPOINT)
748 clear_bit(hw->config_base, source->xp.dt_cmp_mask);
749 else
750 clear_bit(hw->config_base, source->pmu_events_mask);
751 clear_bit(hw->idx, ccn->dt.pmu_counters_mask);
752 }
753
754 ccn->dt.pmu_counters[hw->idx].source = NULL;
755 ccn->dt.pmu_counters[hw->idx].event = NULL;
756}
757
758static u64 arm_ccn_pmu_read_counter(struct arm_ccn *ccn, int idx)
759{
760 u64 res;
761
762 if (idx == CCN_IDX_PMU_CYCLE_COUNTER) {
763#ifdef readq
764 res = readq(ccn->dt.base + CCN_DT_PMCCNTR);
765#else
766 /* 40 bit counter, can do snapshot and read in two parts */
767 writel(0x1, ccn->dt.base + CCN_DT_PMSR_REQ);
768 while (!(readl(ccn->dt.base + CCN_DT_PMSR) & 0x1))
769 ;
770 writel(0x1, ccn->dt.base + CCN_DT_PMSR_CLR);
771 res = readl(ccn->dt.base + CCN_DT_PMCCNTRSR + 4) & 0xff;
772 res <<= 32;
773 res |= readl(ccn->dt.base + CCN_DT_PMCCNTRSR);
774#endif
775 } else {
776 res = readl(ccn->dt.base + CCN_DT_PMEVCNT(idx));
777 }
778
779 return res;
780}
781
782static void arm_ccn_pmu_event_update(struct perf_event *event)
783{
784 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
785 struct hw_perf_event *hw = &event->hw;
786 u64 prev_count, new_count, mask;
787
788 do {
789 prev_count = local64_read(&hw->prev_count);
790 new_count = arm_ccn_pmu_read_counter(ccn, hw->idx);
791 } while (local64_xchg(&hw->prev_count, new_count) != prev_count);
792
793 mask = (1LLU << (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER ? 40 : 32)) - 1;
794
795 local64_add((new_count - prev_count) & mask, &event->count);
796}
797
798static void arm_ccn_pmu_xp_dt_config(struct perf_event *event, int enable)
799{
800 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
801 struct hw_perf_event *hw = &event->hw;
802 struct arm_ccn_component *xp;
803 u32 val, dt_cfg;
804
805 if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP)
806 xp = &ccn->xp[CCN_CONFIG_XP(event->attr.config)];
807 else
808 xp = &ccn->xp[arm_ccn_node_to_xp(
809 CCN_CONFIG_NODE(event->attr.config))];
810
811 if (enable)
812 dt_cfg = hw->event_base;
813 else
814 dt_cfg = CCN_XP_DT_CONFIG__DT_CFG__PASS_THROUGH;
815
816 spin_lock(&ccn->dt.config_lock);
817
818 val = readl(xp->base + CCN_XP_DT_CONFIG);
819 val &= ~(CCN_XP_DT_CONFIG__DT_CFG__MASK <<
820 CCN_XP_DT_CONFIG__DT_CFG__SHIFT(hw->idx));
821 val |= dt_cfg << CCN_XP_DT_CONFIG__DT_CFG__SHIFT(hw->idx);
822 writel(val, xp->base + CCN_XP_DT_CONFIG);
823
824 spin_unlock(&ccn->dt.config_lock);
825}
826
827static void arm_ccn_pmu_event_start(struct perf_event *event, int flags)
828{
829 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
830 struct hw_perf_event *hw = &event->hw;
831
832 local64_set(&event->hw.prev_count,
833 arm_ccn_pmu_read_counter(ccn, hw->idx));
834 hw->state = 0;
835
836 if (!ccn->irq_used)
837 hrtimer_start(&ccn->dt.hrtimer, arm_ccn_pmu_timer_period(),
838 HRTIMER_MODE_REL);
839
840 /* Set the DT bus input, engaging the counter */
841 arm_ccn_pmu_xp_dt_config(event, 1);
842}
843
844static void arm_ccn_pmu_event_stop(struct perf_event *event, int flags)
845{
846 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
847 struct hw_perf_event *hw = &event->hw;
848 u64 timeout;
849
850 /* Disable counting, setting the DT bus to pass-through mode */
851 arm_ccn_pmu_xp_dt_config(event, 0);
852
853 if (!ccn->irq_used)
854 hrtimer_cancel(&ccn->dt.hrtimer);
855
856 /* Let the DT bus drain */
857 timeout = arm_ccn_pmu_read_counter(ccn, CCN_IDX_PMU_CYCLE_COUNTER) +
858 ccn->num_xps;
859 while (arm_ccn_pmu_read_counter(ccn, CCN_IDX_PMU_CYCLE_COUNTER) <
860 timeout)
861 cpu_relax();
862
863 if (flags & PERF_EF_UPDATE)
864 arm_ccn_pmu_event_update(event);
865
866 hw->state |= PERF_HES_STOPPED;
867}
868
869static void arm_ccn_pmu_xp_watchpoint_config(struct perf_event *event)
870{
871 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
872 struct hw_perf_event *hw = &event->hw;
873 struct arm_ccn_component *source =
874 ccn->dt.pmu_counters[hw->idx].source;
875 unsigned long wp = hw->config_base;
876 u32 val;
877 u64 cmp_l = event->attr.config1;
878 u64 cmp_h = event->attr.config2;
879 u64 mask_l = ccn->dt.cmp_mask[CCN_CONFIG_MASK(event->attr.config)].l;
880 u64 mask_h = ccn->dt.cmp_mask[CCN_CONFIG_MASK(event->attr.config)].h;
881
882 hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT(wp);
883
884 /* Direction (RX/TX), device (port) & virtual channel */
885 val = readl(source->base + CCN_XP_DT_INTERFACE_SEL);
886 val &= ~(CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__MASK <<
887 CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__SHIFT(wp));
888 val |= CCN_CONFIG_DIR(event->attr.config) <<
889 CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__SHIFT(wp);
890 val &= ~(CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__MASK <<
891 CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__SHIFT(wp));
892 val |= CCN_CONFIG_PORT(event->attr.config) <<
893 CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__SHIFT(wp);
894 val &= ~(CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__MASK <<
895 CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__SHIFT(wp));
896 val |= CCN_CONFIG_VC(event->attr.config) <<
897 CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__SHIFT(wp);
898 writel(val, source->base + CCN_XP_DT_INTERFACE_SEL);
899
900 /* Comparison values */
901 writel(cmp_l & 0xffffffff, source->base + CCN_XP_DT_CMP_VAL_L(wp));
902 writel((cmp_l >> 32) & 0xefffffff,
903 source->base + CCN_XP_DT_CMP_VAL_L(wp) + 4);
904 writel(cmp_h & 0xffffffff, source->base + CCN_XP_DT_CMP_VAL_H(wp));
905 writel((cmp_h >> 32) & 0x0fffffff,
906 source->base + CCN_XP_DT_CMP_VAL_H(wp) + 4);
907
908 /* Mask */
909 writel(mask_l & 0xffffffff, source->base + CCN_XP_DT_CMP_MASK_L(wp));
910 writel((mask_l >> 32) & 0xefffffff,
911 source->base + CCN_XP_DT_CMP_MASK_L(wp) + 4);
912 writel(mask_h & 0xffffffff, source->base + CCN_XP_DT_CMP_MASK_H(wp));
913 writel((mask_h >> 32) & 0x0fffffff,
914 source->base + CCN_XP_DT_CMP_MASK_H(wp) + 4);
915}
916
917static void arm_ccn_pmu_xp_event_config(struct perf_event *event)
918{
919 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
920 struct hw_perf_event *hw = &event->hw;
921 struct arm_ccn_component *source =
922 ccn->dt.pmu_counters[hw->idx].source;
923 u32 val, id;
924
925 hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__XP_PMU_EVENT(hw->config_base);
926
927 id = (CCN_CONFIG_VC(event->attr.config) << 4) |
928 (CCN_CONFIG_PORT(event->attr.config) << 3) |
929 (CCN_CONFIG_EVENT(event->attr.config) << 0);
930
931 val = readl(source->base + CCN_XP_PMU_EVENT_SEL);
932 val &= ~(CCN_XP_PMU_EVENT_SEL__ID__MASK <<
933 CCN_XP_PMU_EVENT_SEL__ID__SHIFT(hw->config_base));
934 val |= id << CCN_XP_PMU_EVENT_SEL__ID__SHIFT(hw->config_base);
935 writel(val, source->base + CCN_XP_PMU_EVENT_SEL);
936}
937
938static void arm_ccn_pmu_node_event_config(struct perf_event *event)
939{
940 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
941 struct hw_perf_event *hw = &event->hw;
942 struct arm_ccn_component *source =
943 ccn->dt.pmu_counters[hw->idx].source;
944 u32 type = CCN_CONFIG_TYPE(event->attr.config);
945 u32 val, port;
946
947 port = arm_ccn_node_to_xp_port(CCN_CONFIG_NODE(event->attr.config));
948 hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__DEVICE_PMU_EVENT(port,
949 hw->config_base);
950
951 /* These *_event_sel regs should be identical, but let's make sure... */
952 BUILD_BUG_ON(CCN_HNF_PMU_EVENT_SEL != CCN_SBAS_PMU_EVENT_SEL);
953 BUILD_BUG_ON(CCN_SBAS_PMU_EVENT_SEL != CCN_RNI_PMU_EVENT_SEL);
954 BUILD_BUG_ON(CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(1) !=
955 CCN_SBAS_PMU_EVENT_SEL__ID__SHIFT(1));
956 BUILD_BUG_ON(CCN_SBAS_PMU_EVENT_SEL__ID__SHIFT(1) !=
957 CCN_RNI_PMU_EVENT_SEL__ID__SHIFT(1));
958 BUILD_BUG_ON(CCN_HNF_PMU_EVENT_SEL__ID__MASK !=
959 CCN_SBAS_PMU_EVENT_SEL__ID__MASK);
960 BUILD_BUG_ON(CCN_SBAS_PMU_EVENT_SEL__ID__MASK !=
961 CCN_RNI_PMU_EVENT_SEL__ID__MASK);
962 if (WARN_ON(type != CCN_TYPE_HNF && type != CCN_TYPE_SBAS &&
963 !arm_ccn_pmu_type_eq(type, CCN_TYPE_RNI_3P)))
964 return;
965
966 /* Set the event id for the pre-allocated counter */
967 val = readl(source->base + CCN_HNF_PMU_EVENT_SEL);
968 val &= ~(CCN_HNF_PMU_EVENT_SEL__ID__MASK <<
969 CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(hw->config_base));
970 val |= CCN_CONFIG_EVENT(event->attr.config) <<
971 CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(hw->config_base);
972 writel(val, source->base + CCN_HNF_PMU_EVENT_SEL);
973}
974
975static void arm_ccn_pmu_event_config(struct perf_event *event)
976{
977 struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu);
978 struct hw_perf_event *hw = &event->hw;
979 u32 xp, offset, val;
980
981 /* Cycle counter requires no setup */
982 if (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER)
983 return;
984
985 if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP)
986 xp = CCN_CONFIG_XP(event->attr.config);
987 else
988 xp = arm_ccn_node_to_xp(CCN_CONFIG_NODE(event->attr.config));
989
990 spin_lock(&ccn->dt.config_lock);
991
992 /* Set the DT bus "distance" register */
993 offset = (hw->idx / 4) * 4;
994 val = readl(ccn->dt.base + CCN_DT_ACTIVE_DSM + offset);
995 val &= ~(CCN_DT_ACTIVE_DSM__DSM_ID__MASK <<
996 CCN_DT_ACTIVE_DSM__DSM_ID__SHIFT(hw->idx % 4));
997 val |= xp << CCN_DT_ACTIVE_DSM__DSM_ID__SHIFT(hw->idx % 4);
998 writel(val, ccn->dt.base + CCN_DT_ACTIVE_DSM + offset);
999
1000 if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP) {
1001 if (CCN_CONFIG_EVENT(event->attr.config) ==
1002 CCN_EVENT_WATCHPOINT)
1003 arm_ccn_pmu_xp_watchpoint_config(event);
1004 else
1005 arm_ccn_pmu_xp_event_config(event);
1006 } else {
1007 arm_ccn_pmu_node_event_config(event);
1008 }
1009
1010 spin_unlock(&ccn->dt.config_lock);
1011}
1012
1013static int arm_ccn_pmu_event_add(struct perf_event *event, int flags)
1014{
1015 struct hw_perf_event *hw = &event->hw;
1016
1017 arm_ccn_pmu_event_config(event);
1018
1019 hw->state = PERF_HES_STOPPED;
1020
1021 if (flags & PERF_EF_START)
1022 arm_ccn_pmu_event_start(event, PERF_EF_UPDATE);
1023
1024 return 0;
1025}
1026
1027static void arm_ccn_pmu_event_del(struct perf_event *event, int flags)
1028{
1029 arm_ccn_pmu_event_stop(event, PERF_EF_UPDATE);
1030
1031 arm_ccn_pmu_event_free(event);
1032}
1033
1034static void arm_ccn_pmu_event_read(struct perf_event *event)
1035{
1036 arm_ccn_pmu_event_update(event);
1037}
1038
1039static irqreturn_t arm_ccn_pmu_overflow_handler(struct arm_ccn_dt *dt)
1040{
1041 u32 pmovsr = readl(dt->base + CCN_DT_PMOVSR);
1042 int idx;
1043
1044 if (!pmovsr)
1045 return IRQ_NONE;
1046
1047 writel(pmovsr, dt->base + CCN_DT_PMOVSR_CLR);
1048
1049 BUILD_BUG_ON(CCN_IDX_PMU_CYCLE_COUNTER != CCN_NUM_PMU_EVENT_COUNTERS);
1050
1051 for (idx = 0; idx < CCN_NUM_PMU_EVENT_COUNTERS + 1; idx++) {
1052 struct perf_event *event = dt->pmu_counters[idx].event;
1053 int overflowed = pmovsr & BIT(idx);
1054
1055 WARN_ON_ONCE(overflowed && !event);
1056
1057 if (!event || !overflowed)
1058 continue;
1059
1060 arm_ccn_pmu_event_update(event);
1061 }
1062
1063 return IRQ_HANDLED;
1064}
1065
1066static enum hrtimer_restart arm_ccn_pmu_timer_handler(struct hrtimer *hrtimer)
1067{
1068 struct arm_ccn_dt *dt = container_of(hrtimer, struct arm_ccn_dt,
1069 hrtimer);
1070 unsigned long flags;
1071
1072 local_irq_save(flags);
1073 arm_ccn_pmu_overflow_handler(dt);
1074 local_irq_restore(flags);
1075
1076 hrtimer_forward_now(hrtimer, arm_ccn_pmu_timer_period());
1077 return HRTIMER_RESTART;
1078}
1079
1080
1081static DEFINE_IDA(arm_ccn_pmu_ida);
1082
1083static int arm_ccn_pmu_init(struct arm_ccn *ccn)
1084{
1085 int i;
1086 char *name;
1087
1088 /* Initialize DT subsystem */
1089 ccn->dt.base = ccn->base + CCN_REGION_SIZE;
1090 spin_lock_init(&ccn->dt.config_lock);
1091 writel(CCN_DT_CTL__DT_EN, ccn->dt.base + CCN_DT_CTL);
1092 writel(CCN_DT_PMCR__OVFL_INTR_EN | CCN_DT_PMCR__PMU_EN,
1093 ccn->dt.base + CCN_DT_PMCR);
1094 writel(0x1, ccn->dt.base + CCN_DT_PMSR_CLR);
1095 for (i = 0; i < ccn->num_xps; i++) {
1096 writel(0, ccn->xp[i].base + CCN_XP_DT_CONFIG);
1097 writel((CCN_XP_DT_CONTROL__WP_ARM_SEL__ALWAYS <<
1098 CCN_XP_DT_CONTROL__WP_ARM_SEL__SHIFT(0)) |
1099 (CCN_XP_DT_CONTROL__WP_ARM_SEL__ALWAYS <<
1100 CCN_XP_DT_CONTROL__WP_ARM_SEL__SHIFT(1)) |
1101 CCN_XP_DT_CONTROL__DT_ENABLE,
1102 ccn->xp[i].base + CCN_XP_DT_CONTROL);
1103 }
1104 ccn->dt.cmp_mask[CCN_IDX_MASK_ANY].l = ~0;
1105 ccn->dt.cmp_mask[CCN_IDX_MASK_ANY].h = ~0;
1106 ccn->dt.cmp_mask[CCN_IDX_MASK_EXACT].l = 0;
1107 ccn->dt.cmp_mask[CCN_IDX_MASK_EXACT].h = 0;
1108 ccn->dt.cmp_mask[CCN_IDX_MASK_ORDER].l = ~0;
1109 ccn->dt.cmp_mask[CCN_IDX_MASK_ORDER].h = ~(0x1 << 15);
1110 ccn->dt.cmp_mask[CCN_IDX_MASK_OPCODE].l = ~0;
1111 ccn->dt.cmp_mask[CCN_IDX_MASK_OPCODE].h = ~(0x1f << 9);
1112
1113 /* Get a convenient /sys/event_source/devices/ name */
1114 ccn->dt.id = ida_simple_get(&arm_ccn_pmu_ida, 0, 0, GFP_KERNEL);
1115 if (ccn->dt.id == 0) {
1116 name = "ccn";
1117 } else {
1118 int len = snprintf(NULL, 0, "ccn_%d", ccn->dt.id);
1119
1120 name = devm_kzalloc(ccn->dev, len + 1, GFP_KERNEL);
1121 snprintf(name, len + 1, "ccn_%d", ccn->dt.id);
1122 }
1123
1124 /* Perf driver registration */
1125 ccn->dt.pmu = (struct pmu) {
1126 .attr_groups = arm_ccn_pmu_attr_groups,
1127 .task_ctx_nr = perf_invalid_context,
1128 .event_init = arm_ccn_pmu_event_init,
1129 .add = arm_ccn_pmu_event_add,
1130 .del = arm_ccn_pmu_event_del,
1131 .start = arm_ccn_pmu_event_start,
1132 .stop = arm_ccn_pmu_event_stop,
1133 .read = arm_ccn_pmu_event_read,
1134 };
1135
1136 /* No overflow interrupt? Have to use a timer instead. */
1137 if (!ccn->irq_used) {
1138 dev_info(ccn->dev, "No access to interrupts, using timer.\n");
1139 hrtimer_init(&ccn->dt.hrtimer, CLOCK_MONOTONIC,
1140 HRTIMER_MODE_REL);
1141 ccn->dt.hrtimer.function = arm_ccn_pmu_timer_handler;
1142 }
1143
1144 return perf_pmu_register(&ccn->dt.pmu, name, -1);
1145}
1146
1147static void arm_ccn_pmu_cleanup(struct arm_ccn *ccn)
1148{
1149 int i;
1150
1151 for (i = 0; i < ccn->num_xps; i++)
1152 writel(0, ccn->xp[i].base + CCN_XP_DT_CONTROL);
1153 writel(0, ccn->dt.base + CCN_DT_PMCR);
1154 perf_pmu_unregister(&ccn->dt.pmu);
1155 ida_simple_remove(&arm_ccn_pmu_ida, ccn->dt.id);
1156}
1157
1158
1159static int arm_ccn_for_each_valid_region(struct arm_ccn *ccn,
1160 int (*callback)(struct arm_ccn *ccn, int region,
1161 void __iomem *base, u32 type, u32 id))
1162{
1163 int region;
1164
1165 for (region = 0; region < CCN_NUM_REGIONS; region++) {
1166 u32 val, type, id;
1167 void __iomem *base;
1168 int err;
1169
1170 val = readl(ccn->base + CCN_MN_OLY_COMP_LIST_63_0 +
1171 4 * (region / 32));
1172 if (!(val & (1 << (region % 32))))
1173 continue;
1174
1175 base = ccn->base + region * CCN_REGION_SIZE;
1176 val = readl(base + CCN_ALL_OLY_ID);
1177 type = (val >> CCN_ALL_OLY_ID__OLY_ID__SHIFT) &
1178 CCN_ALL_OLY_ID__OLY_ID__MASK;
1179 id = (val >> CCN_ALL_OLY_ID__NODE_ID__SHIFT) &
1180 CCN_ALL_OLY_ID__NODE_ID__MASK;
1181
1182 err = callback(ccn, region, base, type, id);
1183 if (err)
1184 return err;
1185 }
1186
1187 return 0;
1188}
1189
1190static int arm_ccn_get_nodes_num(struct arm_ccn *ccn, int region,
1191 void __iomem *base, u32 type, u32 id)
1192{
1193
1194 if (type == CCN_TYPE_XP && id >= ccn->num_xps)
1195 ccn->num_xps = id + 1;
1196 else if (id >= ccn->num_nodes)
1197 ccn->num_nodes = id + 1;
1198
1199 return 0;
1200}
1201
1202static int arm_ccn_init_nodes(struct arm_ccn *ccn, int region,
1203 void __iomem *base, u32 type, u32 id)
1204{
1205 struct arm_ccn_component *component;
1206
1207 dev_dbg(ccn->dev, "Region %d: id=%u, type=0x%02x\n", region, id, type);
1208
1209 switch (type) {
1210 case CCN_TYPE_MN:
1211 case CCN_TYPE_DT:
1212 return 0;
1213 case CCN_TYPE_XP:
1214 component = &ccn->xp[id];
1215 break;
1216 case CCN_TYPE_SBSX:
1217 ccn->sbsx_present = 1;
1218 component = &ccn->node[id];
1219 break;
1220 case CCN_TYPE_SBAS:
1221 ccn->sbas_present = 1;
1222 /* Fall-through */
1223 default:
1224 component = &ccn->node[id];
1225 break;
1226 }
1227
1228 component->base = base;
1229 component->type = type;
1230
1231 return 0;
1232}
1233
1234
1235static irqreturn_t arm_ccn_error_handler(struct arm_ccn *ccn,
1236 const u32 *err_sig_val)
1237{
1238 /* This should be really handled by firmware... */
1239 dev_err(ccn->dev, "Error reported in %08x%08x%08x%08x%08x%08x.\n",
1240 err_sig_val[5], err_sig_val[4], err_sig_val[3],
1241 err_sig_val[2], err_sig_val[1], err_sig_val[0]);
1242 dev_err(ccn->dev, "Disabling interrupt generation for all errors.\n");
1243 writel(CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLE,
1244 ccn->base + CCN_MN_ERRINT_STATUS);
1245
1246 return IRQ_HANDLED;
1247}
1248
1249
1250static irqreturn_t arm_ccn_irq_handler(int irq, void *dev_id)
1251{
1252 irqreturn_t res = IRQ_NONE;
1253 struct arm_ccn *ccn = dev_id;
1254 u32 err_sig_val[6];
1255 u32 err_or;
1256 int i;
1257
1258 /* PMU overflow is a special case */
1259 err_or = err_sig_val[0] = readl(ccn->base + CCN_MN_ERR_SIG_VAL_63_0);
1260 if (err_or & CCN_MN_ERR_SIG_VAL_63_0__DT) {
1261 err_or &= ~CCN_MN_ERR_SIG_VAL_63_0__DT;
1262 res = arm_ccn_pmu_overflow_handler(&ccn->dt);
1263 }
1264
1265 /* Have to read all err_sig_vals to clear them */
1266 for (i = 1; i < ARRAY_SIZE(err_sig_val); i++) {
1267 err_sig_val[i] = readl(ccn->base +
1268 CCN_MN_ERR_SIG_VAL_63_0 + i * 4);
1269 err_or |= err_sig_val[i];
1270 }
1271 if (err_or)
1272 res |= arm_ccn_error_handler(ccn, err_sig_val);
1273
1274 if (res != IRQ_NONE)
1275 writel(CCN_MN_ERRINT_STATUS__INTREQ__DESSERT,
1276 ccn->base + CCN_MN_ERRINT_STATUS);
1277
1278 return res;
1279}
1280
1281
1282static int arm_ccn_probe(struct platform_device *pdev)
1283{
1284 struct arm_ccn *ccn;
1285 struct resource *res;
1286 int err;
1287
1288 ccn = devm_kzalloc(&pdev->dev, sizeof(*ccn), GFP_KERNEL);
1289 if (!ccn)
1290 return -ENOMEM;
1291 ccn->dev = &pdev->dev;
1292 platform_set_drvdata(pdev, ccn);
1293
1294 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1295 if (!res)
1296 return -EINVAL;
1297
1298 if (!devm_request_mem_region(ccn->dev, res->start,
1299 resource_size(res), pdev->name))
1300 return -EBUSY;
1301
1302 ccn->base = devm_ioremap(ccn->dev, res->start,
1303 resource_size(res));
1304 if (!ccn->base)
1305 return -EFAULT;
1306
1307 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1308 if (!res)
1309 return -EINVAL;
1310
1311 /* Check if we can use the interrupt */
1312 writel(CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLE,
1313 ccn->base + CCN_MN_ERRINT_STATUS);
1314 if (readl(ccn->base + CCN_MN_ERRINT_STATUS) &
1315 CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLED) {
1316 /* Can set 'disable' bits, so can acknowledge interrupts */
1317 writel(CCN_MN_ERRINT_STATUS__PMU_EVENTS__ENABLE,
1318 ccn->base + CCN_MN_ERRINT_STATUS);
1319 err = devm_request_irq(ccn->dev, res->start,
1320 arm_ccn_irq_handler, 0, dev_name(ccn->dev),
1321 ccn);
1322 if (err)
1323 return err;
1324
1325 ccn->irq_used = 1;
1326 }
1327
1328
1329 /* Build topology */
1330
1331 err = arm_ccn_for_each_valid_region(ccn, arm_ccn_get_nodes_num);
1332 if (err)
1333 return err;
1334
1335 ccn->node = devm_kzalloc(ccn->dev, sizeof(*ccn->node) * ccn->num_nodes,
1336 GFP_KERNEL);
1337 ccn->xp = devm_kzalloc(ccn->dev, sizeof(*ccn->node) * ccn->num_xps,
1338 GFP_KERNEL);
1339 if (!ccn->node || !ccn->xp)
1340 return -ENOMEM;
1341
1342 err = arm_ccn_for_each_valid_region(ccn, arm_ccn_init_nodes);
1343 if (err)
1344 return err;
1345
1346 return arm_ccn_pmu_init(ccn);
1347}
1348
1349static int arm_ccn_remove(struct platform_device *pdev)
1350{
1351 struct arm_ccn *ccn = platform_get_drvdata(pdev);
1352
1353 arm_ccn_pmu_cleanup(ccn);
1354
1355 return 0;
1356}
1357
1358static const struct of_device_id arm_ccn_match[] = {
1359 { .compatible = "arm,ccn-504", },
1360 {},
1361};
1362
1363static struct platform_driver arm_ccn_driver = {
1364 .driver = {
1365 .name = "arm-ccn",
1366 .of_match_table = arm_ccn_match,
1367 },
1368 .probe = arm_ccn_probe,
1369 .remove = arm_ccn_remove,
1370};
1371
1372static int __init arm_ccn_init(void)
1373{
1374 int i;
1375
1376 for (i = 0; i < ARRAY_SIZE(arm_ccn_pmu_events); i++)
1377 arm_ccn_pmu_events_attrs[i] = &arm_ccn_pmu_events[i].attr.attr;
1378
1379 return platform_driver_register(&arm_ccn_driver);
1380}
1381
1382static void __exit arm_ccn_exit(void)
1383{
1384 platform_driver_unregister(&arm_ccn_driver);
1385}
1386
1387module_init(arm_ccn_init);
1388module_exit(arm_ccn_exit);
1389
1390MODULE_AUTHOR("Pawel Moll <pawel.moll@arm.com>");
1391MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)