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