1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * APM X-Gene SoC PMU (Performance Monitor Unit) 4 * 5 * Copyright (c) 2016, Applied Micro Circuits Corporation 6 * Author: Hoan Tran <hotran@apm.com> 7 * Tai Nguyen <ttnguyen@apm.com> 8 */ 9 10 #include <linux/acpi.h> 11 #include <linux/clk.h> 12 #include <linux/cpuhotplug.h> 13 #include <linux/cpumask.h> 14 #include <linux/interrupt.h> 15 #include <linux/io.h> 16 #include <linux/mfd/syscon.h> 17 #include <linux/module.h> 18 #include <linux/of_address.h> 19 #include <linux/of_fdt.h> 20 #include <linux/of_irq.h> 21 #include <linux/of_platform.h> 22 #include <linux/perf_event.h> 23 #include <linux/platform_device.h> 24 #include <linux/regmap.h> 25 #include <linux/slab.h> 26 27 #define CSW_CSWCR 0x0000 28 #define CSW_CSWCR_DUALMCB_MASK BIT(0) 29 #define CSW_CSWCR_MCB0_ROUTING(x) (((x) & 0x0C) >> 2) 30 #define CSW_CSWCR_MCB1_ROUTING(x) (((x) & 0x30) >> 4) 31 #define MCBADDRMR 0x0000 32 #define MCBADDRMR_DUALMCU_MODE_MASK BIT(2) 33 34 #define PCPPMU_INTSTATUS_REG 0x000 35 #define PCPPMU_INTMASK_REG 0x004 36 #define PCPPMU_INTMASK 0x0000000F 37 #define PCPPMU_INTENMASK 0xFFFFFFFF 38 #define PCPPMU_INTCLRMASK 0xFFFFFFF0 39 #define PCPPMU_INT_MCU BIT(0) 40 #define PCPPMU_INT_MCB BIT(1) 41 #define PCPPMU_INT_L3C BIT(2) 42 #define PCPPMU_INT_IOB BIT(3) 43 44 #define PCPPMU_V3_INTMASK 0x00FF33FF 45 #define PCPPMU_V3_INTENMASK 0xFFFFFFFF 46 #define PCPPMU_V3_INTCLRMASK 0xFF00CC00 47 #define PCPPMU_V3_INT_MCU 0x000000FF 48 #define PCPPMU_V3_INT_MCB 0x00000300 49 #define PCPPMU_V3_INT_L3C 0x00FF0000 50 #define PCPPMU_V3_INT_IOB 0x00003000 51 52 #define PMU_MAX_COUNTERS 4 53 #define PMU_CNT_MAX_PERIOD 0xFFFFFFFFULL 54 #define PMU_V3_CNT_MAX_PERIOD 0xFFFFFFFFFFFFFFFFULL 55 #define PMU_OVERFLOW_MASK 0xF 56 #define PMU_PMCR_E BIT(0) 57 #define PMU_PMCR_P BIT(1) 58 59 #define PMU_PMEVCNTR0 0x000 60 #define PMU_PMEVCNTR1 0x004 61 #define PMU_PMEVCNTR2 0x008 62 #define PMU_PMEVCNTR3 0x00C 63 #define PMU_PMEVTYPER0 0x400 64 #define PMU_PMEVTYPER1 0x404 65 #define PMU_PMEVTYPER2 0x408 66 #define PMU_PMEVTYPER3 0x40C 67 #define PMU_PMAMR0 0xA00 68 #define PMU_PMAMR1 0xA04 69 #define PMU_PMCNTENSET 0xC00 70 #define PMU_PMCNTENCLR 0xC20 71 #define PMU_PMINTENSET 0xC40 72 #define PMU_PMINTENCLR 0xC60 73 #define PMU_PMOVSR 0xC80 74 #define PMU_PMCR 0xE04 75 76 /* PMU registers for V3 */ 77 #define PMU_PMOVSCLR 0xC80 78 #define PMU_PMOVSSET 0xCC0 79 80 #define to_pmu_dev(p) container_of(p, struct xgene_pmu_dev, pmu) 81 #define GET_CNTR(ev) (ev->hw.idx) 82 #define GET_EVENTID(ev) (ev->hw.config & 0xFFULL) 83 #define GET_AGENTID(ev) (ev->hw.config_base & 0xFFFFFFFFUL) 84 #define GET_AGENT1ID(ev) ((ev->hw.config_base >> 32) & 0xFFFFFFFFUL) 85 86 struct hw_pmu_info { 87 u32 type; 88 u32 enable_mask; 89 void __iomem *csr; 90 }; 91 92 struct xgene_pmu_dev { 93 struct hw_pmu_info *inf; 94 struct xgene_pmu *parent; 95 struct pmu pmu; 96 u8 max_counters; 97 DECLARE_BITMAP(cntr_assign_mask, PMU_MAX_COUNTERS); 98 u64 max_period; 99 const struct attribute_group **attr_groups; 100 struct perf_event *pmu_counter_event[PMU_MAX_COUNTERS]; 101 }; 102 103 struct xgene_pmu_ops { 104 void (*mask_int)(struct xgene_pmu *pmu); 105 void (*unmask_int)(struct xgene_pmu *pmu); 106 u64 (*read_counter)(struct xgene_pmu_dev *pmu, int idx); 107 void (*write_counter)(struct xgene_pmu_dev *pmu, int idx, u64 val); 108 void (*write_evttype)(struct xgene_pmu_dev *pmu_dev, int idx, u32 val); 109 void (*write_agentmsk)(struct xgene_pmu_dev *pmu_dev, u32 val); 110 void (*write_agent1msk)(struct xgene_pmu_dev *pmu_dev, u32 val); 111 void (*enable_counter)(struct xgene_pmu_dev *pmu_dev, int idx); 112 void (*disable_counter)(struct xgene_pmu_dev *pmu_dev, int idx); 113 void (*enable_counter_int)(struct xgene_pmu_dev *pmu_dev, int idx); 114 void (*disable_counter_int)(struct xgene_pmu_dev *pmu_dev, int idx); 115 void (*reset_counters)(struct xgene_pmu_dev *pmu_dev); 116 void (*start_counters)(struct xgene_pmu_dev *pmu_dev); 117 void (*stop_counters)(struct xgene_pmu_dev *pmu_dev); 118 }; 119 120 struct xgene_pmu { 121 struct device *dev; 122 struct hlist_node node; 123 int version; 124 void __iomem *pcppmu_csr; 125 u32 mcb_active_mask; 126 u32 mc_active_mask; 127 u32 l3c_active_mask; 128 cpumask_t cpu; 129 int irq; 130 raw_spinlock_t lock; 131 const struct xgene_pmu_ops *ops; 132 struct list_head l3cpmus; 133 struct list_head iobpmus; 134 struct list_head mcbpmus; 135 struct list_head mcpmus; 136 }; 137 138 struct xgene_pmu_dev_ctx { 139 char *name; 140 struct list_head next; 141 struct xgene_pmu_dev *pmu_dev; 142 struct hw_pmu_info inf; 143 }; 144 145 struct xgene_pmu_data { 146 int id; 147 u32 data; 148 }; 149 150 enum xgene_pmu_version { 151 PCP_PMU_V1 = 1, 152 PCP_PMU_V2, 153 PCP_PMU_V3, 154 }; 155 156 enum xgene_pmu_dev_type { 157 PMU_TYPE_L3C = 0, 158 PMU_TYPE_IOB, 159 PMU_TYPE_IOB_SLOW, 160 PMU_TYPE_MCB, 161 PMU_TYPE_MC, 162 }; 163 164 /* 165 * sysfs format attributes 166 */ 167 static ssize_t xgene_pmu_format_show(struct device *dev, 168 struct device_attribute *attr, char *buf) 169 { 170 struct dev_ext_attribute *eattr; 171 172 eattr = container_of(attr, struct dev_ext_attribute, attr); 173 return sprintf(buf, "%s\n", (char *) eattr->var); 174 } 175 176 #define XGENE_PMU_FORMAT_ATTR(_name, _config) \ 177 (&((struct dev_ext_attribute[]) { \ 178 { .attr = __ATTR(_name, S_IRUGO, xgene_pmu_format_show, NULL), \ 179 .var = (void *) _config, } \ 180 })[0].attr.attr) 181 182 static struct attribute *l3c_pmu_format_attrs[] = { 183 XGENE_PMU_FORMAT_ATTR(l3c_eventid, "config:0-7"), 184 XGENE_PMU_FORMAT_ATTR(l3c_agentid, "config1:0-9"), 185 NULL, 186 }; 187 188 static struct attribute *iob_pmu_format_attrs[] = { 189 XGENE_PMU_FORMAT_ATTR(iob_eventid, "config:0-7"), 190 XGENE_PMU_FORMAT_ATTR(iob_agentid, "config1:0-63"), 191 NULL, 192 }; 193 194 static struct attribute *mcb_pmu_format_attrs[] = { 195 XGENE_PMU_FORMAT_ATTR(mcb_eventid, "config:0-5"), 196 XGENE_PMU_FORMAT_ATTR(mcb_agentid, "config1:0-9"), 197 NULL, 198 }; 199 200 static struct attribute *mc_pmu_format_attrs[] = { 201 XGENE_PMU_FORMAT_ATTR(mc_eventid, "config:0-28"), 202 NULL, 203 }; 204 205 static const struct attribute_group l3c_pmu_format_attr_group = { 206 .name = "format", 207 .attrs = l3c_pmu_format_attrs, 208 }; 209 210 static const struct attribute_group iob_pmu_format_attr_group = { 211 .name = "format", 212 .attrs = iob_pmu_format_attrs, 213 }; 214 215 static const struct attribute_group mcb_pmu_format_attr_group = { 216 .name = "format", 217 .attrs = mcb_pmu_format_attrs, 218 }; 219 220 static const struct attribute_group mc_pmu_format_attr_group = { 221 .name = "format", 222 .attrs = mc_pmu_format_attrs, 223 }; 224 225 static struct attribute *l3c_pmu_v3_format_attrs[] = { 226 XGENE_PMU_FORMAT_ATTR(l3c_eventid, "config:0-39"), 227 NULL, 228 }; 229 230 static struct attribute *iob_pmu_v3_format_attrs[] = { 231 XGENE_PMU_FORMAT_ATTR(iob_eventid, "config:0-47"), 232 NULL, 233 }; 234 235 static struct attribute *iob_slow_pmu_v3_format_attrs[] = { 236 XGENE_PMU_FORMAT_ATTR(iob_slow_eventid, "config:0-16"), 237 NULL, 238 }; 239 240 static struct attribute *mcb_pmu_v3_format_attrs[] = { 241 XGENE_PMU_FORMAT_ATTR(mcb_eventid, "config:0-35"), 242 NULL, 243 }; 244 245 static struct attribute *mc_pmu_v3_format_attrs[] = { 246 XGENE_PMU_FORMAT_ATTR(mc_eventid, "config:0-44"), 247 NULL, 248 }; 249 250 static const struct attribute_group l3c_pmu_v3_format_attr_group = { 251 .name = "format", 252 .attrs = l3c_pmu_v3_format_attrs, 253 }; 254 255 static const struct attribute_group iob_pmu_v3_format_attr_group = { 256 .name = "format", 257 .attrs = iob_pmu_v3_format_attrs, 258 }; 259 260 static const struct attribute_group iob_slow_pmu_v3_format_attr_group = { 261 .name = "format", 262 .attrs = iob_slow_pmu_v3_format_attrs, 263 }; 264 265 static const struct attribute_group mcb_pmu_v3_format_attr_group = { 266 .name = "format", 267 .attrs = mcb_pmu_v3_format_attrs, 268 }; 269 270 static const struct attribute_group mc_pmu_v3_format_attr_group = { 271 .name = "format", 272 .attrs = mc_pmu_v3_format_attrs, 273 }; 274 275 /* 276 * sysfs event attributes 277 */ 278 static ssize_t xgene_pmu_event_show(struct device *dev, 279 struct device_attribute *attr, char *buf) 280 { 281 struct dev_ext_attribute *eattr; 282 283 eattr = container_of(attr, struct dev_ext_attribute, attr); 284 return sprintf(buf, "config=0x%lx\n", (unsigned long) eattr->var); 285 } 286 287 #define XGENE_PMU_EVENT_ATTR(_name, _config) \ 288 (&((struct dev_ext_attribute[]) { \ 289 { .attr = __ATTR(_name, S_IRUGO, xgene_pmu_event_show, NULL), \ 290 .var = (void *) _config, } \ 291 })[0].attr.attr) 292 293 static struct attribute *l3c_pmu_events_attrs[] = { 294 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00), 295 XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01), 296 XGENE_PMU_EVENT_ATTR(read-hit, 0x02), 297 XGENE_PMU_EVENT_ATTR(read-miss, 0x03), 298 XGENE_PMU_EVENT_ATTR(write-need-replacement, 0x06), 299 XGENE_PMU_EVENT_ATTR(write-not-need-replacement, 0x07), 300 XGENE_PMU_EVENT_ATTR(tq-full, 0x08), 301 XGENE_PMU_EVENT_ATTR(ackq-full, 0x09), 302 XGENE_PMU_EVENT_ATTR(wdb-full, 0x0a), 303 XGENE_PMU_EVENT_ATTR(bank-fifo-full, 0x0b), 304 XGENE_PMU_EVENT_ATTR(odb-full, 0x0c), 305 XGENE_PMU_EVENT_ATTR(wbq-full, 0x0d), 306 XGENE_PMU_EVENT_ATTR(bank-conflict-fifo-issue, 0x0e), 307 XGENE_PMU_EVENT_ATTR(bank-fifo-issue, 0x0f), 308 NULL, 309 }; 310 311 static struct attribute *iob_pmu_events_attrs[] = { 312 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00), 313 XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01), 314 XGENE_PMU_EVENT_ATTR(axi0-read, 0x02), 315 XGENE_PMU_EVENT_ATTR(axi0-read-partial, 0x03), 316 XGENE_PMU_EVENT_ATTR(axi1-read, 0x04), 317 XGENE_PMU_EVENT_ATTR(axi1-read-partial, 0x05), 318 XGENE_PMU_EVENT_ATTR(csw-read-block, 0x06), 319 XGENE_PMU_EVENT_ATTR(csw-read-partial, 0x07), 320 XGENE_PMU_EVENT_ATTR(axi0-write, 0x10), 321 XGENE_PMU_EVENT_ATTR(axi0-write-partial, 0x11), 322 XGENE_PMU_EVENT_ATTR(axi1-write, 0x13), 323 XGENE_PMU_EVENT_ATTR(axi1-write-partial, 0x14), 324 XGENE_PMU_EVENT_ATTR(csw-inbound-dirty, 0x16), 325 NULL, 326 }; 327 328 static struct attribute *mcb_pmu_events_attrs[] = { 329 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00), 330 XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01), 331 XGENE_PMU_EVENT_ATTR(csw-read, 0x02), 332 XGENE_PMU_EVENT_ATTR(csw-write-request, 0x03), 333 XGENE_PMU_EVENT_ATTR(mcb-csw-stall, 0x04), 334 XGENE_PMU_EVENT_ATTR(cancel-read-gack, 0x05), 335 NULL, 336 }; 337 338 static struct attribute *mc_pmu_events_attrs[] = { 339 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00), 340 XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01), 341 XGENE_PMU_EVENT_ATTR(act-cmd-sent, 0x02), 342 XGENE_PMU_EVENT_ATTR(pre-cmd-sent, 0x03), 343 XGENE_PMU_EVENT_ATTR(rd-cmd-sent, 0x04), 344 XGENE_PMU_EVENT_ATTR(rda-cmd-sent, 0x05), 345 XGENE_PMU_EVENT_ATTR(wr-cmd-sent, 0x06), 346 XGENE_PMU_EVENT_ATTR(wra-cmd-sent, 0x07), 347 XGENE_PMU_EVENT_ATTR(pde-cmd-sent, 0x08), 348 XGENE_PMU_EVENT_ATTR(sre-cmd-sent, 0x09), 349 XGENE_PMU_EVENT_ATTR(prea-cmd-sent, 0x0a), 350 XGENE_PMU_EVENT_ATTR(ref-cmd-sent, 0x0b), 351 XGENE_PMU_EVENT_ATTR(rd-rda-cmd-sent, 0x0c), 352 XGENE_PMU_EVENT_ATTR(wr-wra-cmd-sent, 0x0d), 353 XGENE_PMU_EVENT_ATTR(in-rd-collision, 0x0e), 354 XGENE_PMU_EVENT_ATTR(in-wr-collision, 0x0f), 355 XGENE_PMU_EVENT_ATTR(collision-queue-not-empty, 0x10), 356 XGENE_PMU_EVENT_ATTR(collision-queue-full, 0x11), 357 XGENE_PMU_EVENT_ATTR(mcu-request, 0x12), 358 XGENE_PMU_EVENT_ATTR(mcu-rd-request, 0x13), 359 XGENE_PMU_EVENT_ATTR(mcu-hp-rd-request, 0x14), 360 XGENE_PMU_EVENT_ATTR(mcu-wr-request, 0x15), 361 XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-all, 0x16), 362 XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-cancel, 0x17), 363 XGENE_PMU_EVENT_ATTR(mcu-rd-response, 0x18), 364 XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-speculative-all, 0x19), 365 XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-speculative-cancel, 0x1a), 366 XGENE_PMU_EVENT_ATTR(mcu-wr-proceed-all, 0x1b), 367 XGENE_PMU_EVENT_ATTR(mcu-wr-proceed-cancel, 0x1c), 368 NULL, 369 }; 370 371 static const struct attribute_group l3c_pmu_events_attr_group = { 372 .name = "events", 373 .attrs = l3c_pmu_events_attrs, 374 }; 375 376 static const struct attribute_group iob_pmu_events_attr_group = { 377 .name = "events", 378 .attrs = iob_pmu_events_attrs, 379 }; 380 381 static const struct attribute_group mcb_pmu_events_attr_group = { 382 .name = "events", 383 .attrs = mcb_pmu_events_attrs, 384 }; 385 386 static const struct attribute_group mc_pmu_events_attr_group = { 387 .name = "events", 388 .attrs = mc_pmu_events_attrs, 389 }; 390 391 static struct attribute *l3c_pmu_v3_events_attrs[] = { 392 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00), 393 XGENE_PMU_EVENT_ATTR(read-hit, 0x01), 394 XGENE_PMU_EVENT_ATTR(read-miss, 0x02), 395 XGENE_PMU_EVENT_ATTR(index-flush-eviction, 0x03), 396 XGENE_PMU_EVENT_ATTR(write-caused-replacement, 0x04), 397 XGENE_PMU_EVENT_ATTR(write-not-caused-replacement, 0x05), 398 XGENE_PMU_EVENT_ATTR(clean-eviction, 0x06), 399 XGENE_PMU_EVENT_ATTR(dirty-eviction, 0x07), 400 XGENE_PMU_EVENT_ATTR(read, 0x08), 401 XGENE_PMU_EVENT_ATTR(write, 0x09), 402 XGENE_PMU_EVENT_ATTR(request, 0x0a), 403 XGENE_PMU_EVENT_ATTR(tq-bank-conflict-issue-stall, 0x0b), 404 XGENE_PMU_EVENT_ATTR(tq-full, 0x0c), 405 XGENE_PMU_EVENT_ATTR(ackq-full, 0x0d), 406 XGENE_PMU_EVENT_ATTR(wdb-full, 0x0e), 407 XGENE_PMU_EVENT_ATTR(odb-full, 0x10), 408 XGENE_PMU_EVENT_ATTR(wbq-full, 0x11), 409 XGENE_PMU_EVENT_ATTR(input-req-async-fifo-stall, 0x12), 410 XGENE_PMU_EVENT_ATTR(output-req-async-fifo-stall, 0x13), 411 XGENE_PMU_EVENT_ATTR(output-data-async-fifo-stall, 0x14), 412 XGENE_PMU_EVENT_ATTR(total-insertion, 0x15), 413 XGENE_PMU_EVENT_ATTR(sip-insertions-r-set, 0x16), 414 XGENE_PMU_EVENT_ATTR(sip-insertions-r-clear, 0x17), 415 XGENE_PMU_EVENT_ATTR(dip-insertions-r-set, 0x18), 416 XGENE_PMU_EVENT_ATTR(dip-insertions-r-clear, 0x19), 417 XGENE_PMU_EVENT_ATTR(dip-insertions-force-r-set, 0x1a), 418 XGENE_PMU_EVENT_ATTR(egression, 0x1b), 419 XGENE_PMU_EVENT_ATTR(replacement, 0x1c), 420 XGENE_PMU_EVENT_ATTR(old-replacement, 0x1d), 421 XGENE_PMU_EVENT_ATTR(young-replacement, 0x1e), 422 XGENE_PMU_EVENT_ATTR(r-set-replacement, 0x1f), 423 XGENE_PMU_EVENT_ATTR(r-clear-replacement, 0x20), 424 XGENE_PMU_EVENT_ATTR(old-r-replacement, 0x21), 425 XGENE_PMU_EVENT_ATTR(old-nr-replacement, 0x22), 426 XGENE_PMU_EVENT_ATTR(young-r-replacement, 0x23), 427 XGENE_PMU_EVENT_ATTR(young-nr-replacement, 0x24), 428 XGENE_PMU_EVENT_ATTR(bloomfilter-clearing, 0x25), 429 XGENE_PMU_EVENT_ATTR(generation-flip, 0x26), 430 XGENE_PMU_EVENT_ATTR(vcc-droop-detected, 0x27), 431 NULL, 432 }; 433 434 static struct attribute *iob_fast_pmu_v3_events_attrs[] = { 435 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00), 436 XGENE_PMU_EVENT_ATTR(pa-req-buf-alloc-all, 0x01), 437 XGENE_PMU_EVENT_ATTR(pa-req-buf-alloc-rd, 0x02), 438 XGENE_PMU_EVENT_ATTR(pa-req-buf-alloc-wr, 0x03), 439 XGENE_PMU_EVENT_ATTR(pa-all-cp-req, 0x04), 440 XGENE_PMU_EVENT_ATTR(pa-cp-blk-req, 0x05), 441 XGENE_PMU_EVENT_ATTR(pa-cp-ptl-req, 0x06), 442 XGENE_PMU_EVENT_ATTR(pa-cp-rd-req, 0x07), 443 XGENE_PMU_EVENT_ATTR(pa-cp-wr-req, 0x08), 444 XGENE_PMU_EVENT_ATTR(ba-all-req, 0x09), 445 XGENE_PMU_EVENT_ATTR(ba-rd-req, 0x0a), 446 XGENE_PMU_EVENT_ATTR(ba-wr-req, 0x0b), 447 XGENE_PMU_EVENT_ATTR(pa-rd-shared-req-issued, 0x10), 448 XGENE_PMU_EVENT_ATTR(pa-rd-exclusive-req-issued, 0x11), 449 XGENE_PMU_EVENT_ATTR(pa-wr-invalidate-req-issued-stashable, 0x12), 450 XGENE_PMU_EVENT_ATTR(pa-wr-invalidate-req-issued-nonstashable, 0x13), 451 XGENE_PMU_EVENT_ATTR(pa-wr-back-req-issued-stashable, 0x14), 452 XGENE_PMU_EVENT_ATTR(pa-wr-back-req-issued-nonstashable, 0x15), 453 XGENE_PMU_EVENT_ATTR(pa-ptl-wr-req, 0x16), 454 XGENE_PMU_EVENT_ATTR(pa-ptl-rd-req, 0x17), 455 XGENE_PMU_EVENT_ATTR(pa-wr-back-clean-data, 0x18), 456 XGENE_PMU_EVENT_ATTR(pa-wr-back-cancelled-on-SS, 0x1b), 457 XGENE_PMU_EVENT_ATTR(pa-barrier-occurrence, 0x1c), 458 XGENE_PMU_EVENT_ATTR(pa-barrier-cycles, 0x1d), 459 XGENE_PMU_EVENT_ATTR(pa-total-cp-snoops, 0x20), 460 XGENE_PMU_EVENT_ATTR(pa-rd-shared-snoop, 0x21), 461 XGENE_PMU_EVENT_ATTR(pa-rd-shared-snoop-hit, 0x22), 462 XGENE_PMU_EVENT_ATTR(pa-rd-exclusive-snoop, 0x23), 463 XGENE_PMU_EVENT_ATTR(pa-rd-exclusive-snoop-hit, 0x24), 464 XGENE_PMU_EVENT_ATTR(pa-rd-wr-invalid-snoop, 0x25), 465 XGENE_PMU_EVENT_ATTR(pa-rd-wr-invalid-snoop-hit, 0x26), 466 XGENE_PMU_EVENT_ATTR(pa-req-buffer-full, 0x28), 467 XGENE_PMU_EVENT_ATTR(cswlf-outbound-req-fifo-full, 0x29), 468 XGENE_PMU_EVENT_ATTR(cswlf-inbound-snoop-fifo-backpressure, 0x2a), 469 XGENE_PMU_EVENT_ATTR(cswlf-outbound-lack-fifo-full, 0x2b), 470 XGENE_PMU_EVENT_ATTR(cswlf-inbound-gack-fifo-backpressure, 0x2c), 471 XGENE_PMU_EVENT_ATTR(cswlf-outbound-data-fifo-full, 0x2d), 472 XGENE_PMU_EVENT_ATTR(cswlf-inbound-data-fifo-backpressure, 0x2e), 473 XGENE_PMU_EVENT_ATTR(cswlf-inbound-req-backpressure, 0x2f), 474 NULL, 475 }; 476 477 static struct attribute *iob_slow_pmu_v3_events_attrs[] = { 478 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00), 479 XGENE_PMU_EVENT_ATTR(pa-axi0-rd-req, 0x01), 480 XGENE_PMU_EVENT_ATTR(pa-axi0-wr-req, 0x02), 481 XGENE_PMU_EVENT_ATTR(pa-axi1-rd-req, 0x03), 482 XGENE_PMU_EVENT_ATTR(pa-axi1-wr-req, 0x04), 483 XGENE_PMU_EVENT_ATTR(ba-all-axi-req, 0x07), 484 XGENE_PMU_EVENT_ATTR(ba-axi-rd-req, 0x08), 485 XGENE_PMU_EVENT_ATTR(ba-axi-wr-req, 0x09), 486 XGENE_PMU_EVENT_ATTR(ba-free-list-empty, 0x10), 487 NULL, 488 }; 489 490 static struct attribute *mcb_pmu_v3_events_attrs[] = { 491 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00), 492 XGENE_PMU_EVENT_ATTR(req-receive, 0x01), 493 XGENE_PMU_EVENT_ATTR(rd-req-recv, 0x02), 494 XGENE_PMU_EVENT_ATTR(rd-req-recv-2, 0x03), 495 XGENE_PMU_EVENT_ATTR(wr-req-recv, 0x04), 496 XGENE_PMU_EVENT_ATTR(wr-req-recv-2, 0x05), 497 XGENE_PMU_EVENT_ATTR(rd-req-sent-to-mcu, 0x06), 498 XGENE_PMU_EVENT_ATTR(rd-req-sent-to-mcu-2, 0x07), 499 XGENE_PMU_EVENT_ATTR(rd-req-sent-to-spec-mcu, 0x08), 500 XGENE_PMU_EVENT_ATTR(rd-req-sent-to-spec-mcu-2, 0x09), 501 XGENE_PMU_EVENT_ATTR(glbl-ack-recv-for-rd-sent-to-spec-mcu, 0x0a), 502 XGENE_PMU_EVENT_ATTR(glbl-ack-go-recv-for-rd-sent-to-spec-mcu, 0x0b), 503 XGENE_PMU_EVENT_ATTR(glbl-ack-nogo-recv-for-rd-sent-to-spec-mcu, 0x0c), 504 XGENE_PMU_EVENT_ATTR(glbl-ack-go-recv-any-rd-req, 0x0d), 505 XGENE_PMU_EVENT_ATTR(glbl-ack-go-recv-any-rd-req-2, 0x0e), 506 XGENE_PMU_EVENT_ATTR(wr-req-sent-to-mcu, 0x0f), 507 XGENE_PMU_EVENT_ATTR(gack-recv, 0x10), 508 XGENE_PMU_EVENT_ATTR(rd-gack-recv, 0x11), 509 XGENE_PMU_EVENT_ATTR(wr-gack-recv, 0x12), 510 XGENE_PMU_EVENT_ATTR(cancel-rd-gack, 0x13), 511 XGENE_PMU_EVENT_ATTR(cancel-wr-gack, 0x14), 512 XGENE_PMU_EVENT_ATTR(mcb-csw-req-stall, 0x15), 513 XGENE_PMU_EVENT_ATTR(mcu-req-intf-blocked, 0x16), 514 XGENE_PMU_EVENT_ATTR(mcb-mcu-rd-intf-stall, 0x17), 515 XGENE_PMU_EVENT_ATTR(csw-rd-intf-blocked, 0x18), 516 XGENE_PMU_EVENT_ATTR(csw-local-ack-intf-blocked, 0x19), 517 XGENE_PMU_EVENT_ATTR(mcu-req-table-full, 0x1a), 518 XGENE_PMU_EVENT_ATTR(mcu-stat-table-full, 0x1b), 519 XGENE_PMU_EVENT_ATTR(mcu-wr-table-full, 0x1c), 520 XGENE_PMU_EVENT_ATTR(mcu-rdreceipt-resp, 0x1d), 521 XGENE_PMU_EVENT_ATTR(mcu-wrcomplete-resp, 0x1e), 522 XGENE_PMU_EVENT_ATTR(mcu-retryack-resp, 0x1f), 523 XGENE_PMU_EVENT_ATTR(mcu-pcrdgrant-resp, 0x20), 524 XGENE_PMU_EVENT_ATTR(mcu-req-from-lastload, 0x21), 525 XGENE_PMU_EVENT_ATTR(mcu-req-from-bypass, 0x22), 526 XGENE_PMU_EVENT_ATTR(volt-droop-detect, 0x23), 527 NULL, 528 }; 529 530 static struct attribute *mc_pmu_v3_events_attrs[] = { 531 XGENE_PMU_EVENT_ATTR(cycle-count, 0x00), 532 XGENE_PMU_EVENT_ATTR(act-sent, 0x01), 533 XGENE_PMU_EVENT_ATTR(pre-sent, 0x02), 534 XGENE_PMU_EVENT_ATTR(rd-sent, 0x03), 535 XGENE_PMU_EVENT_ATTR(rda-sent, 0x04), 536 XGENE_PMU_EVENT_ATTR(wr-sent, 0x05), 537 XGENE_PMU_EVENT_ATTR(wra-sent, 0x06), 538 XGENE_PMU_EVENT_ATTR(pd-entry-vld, 0x07), 539 XGENE_PMU_EVENT_ATTR(sref-entry-vld, 0x08), 540 XGENE_PMU_EVENT_ATTR(prea-sent, 0x09), 541 XGENE_PMU_EVENT_ATTR(ref-sent, 0x0a), 542 XGENE_PMU_EVENT_ATTR(rd-rda-sent, 0x0b), 543 XGENE_PMU_EVENT_ATTR(wr-wra-sent, 0x0c), 544 XGENE_PMU_EVENT_ATTR(raw-hazard, 0x0d), 545 XGENE_PMU_EVENT_ATTR(war-hazard, 0x0e), 546 XGENE_PMU_EVENT_ATTR(waw-hazard, 0x0f), 547 XGENE_PMU_EVENT_ATTR(rar-hazard, 0x10), 548 XGENE_PMU_EVENT_ATTR(raw-war-waw-hazard, 0x11), 549 XGENE_PMU_EVENT_ATTR(hprd-lprd-wr-req-vld, 0x12), 550 XGENE_PMU_EVENT_ATTR(lprd-req-vld, 0x13), 551 XGENE_PMU_EVENT_ATTR(hprd-req-vld, 0x14), 552 XGENE_PMU_EVENT_ATTR(hprd-lprd-req-vld, 0x15), 553 XGENE_PMU_EVENT_ATTR(wr-req-vld, 0x16), 554 XGENE_PMU_EVENT_ATTR(partial-wr-req-vld, 0x17), 555 XGENE_PMU_EVENT_ATTR(rd-retry, 0x18), 556 XGENE_PMU_EVENT_ATTR(wr-retry, 0x19), 557 XGENE_PMU_EVENT_ATTR(retry-gnt, 0x1a), 558 XGENE_PMU_EVENT_ATTR(rank-change, 0x1b), 559 XGENE_PMU_EVENT_ATTR(dir-change, 0x1c), 560 XGENE_PMU_EVENT_ATTR(rank-dir-change, 0x1d), 561 XGENE_PMU_EVENT_ATTR(rank-active, 0x1e), 562 XGENE_PMU_EVENT_ATTR(rank-idle, 0x1f), 563 XGENE_PMU_EVENT_ATTR(rank-pd, 0x20), 564 XGENE_PMU_EVENT_ATTR(rank-sref, 0x21), 565 XGENE_PMU_EVENT_ATTR(queue-fill-gt-thresh, 0x22), 566 XGENE_PMU_EVENT_ATTR(queue-rds-gt-thresh, 0x23), 567 XGENE_PMU_EVENT_ATTR(queue-wrs-gt-thresh, 0x24), 568 XGENE_PMU_EVENT_ATTR(phy-updt-complt, 0x25), 569 XGENE_PMU_EVENT_ATTR(tz-fail, 0x26), 570 XGENE_PMU_EVENT_ATTR(dram-errc, 0x27), 571 XGENE_PMU_EVENT_ATTR(dram-errd, 0x28), 572 XGENE_PMU_EVENT_ATTR(rd-enq, 0x29), 573 XGENE_PMU_EVENT_ATTR(wr-enq, 0x2a), 574 XGENE_PMU_EVENT_ATTR(tmac-limit-reached, 0x2b), 575 XGENE_PMU_EVENT_ATTR(tmaw-tracker-full, 0x2c), 576 NULL, 577 }; 578 579 static const struct attribute_group l3c_pmu_v3_events_attr_group = { 580 .name = "events", 581 .attrs = l3c_pmu_v3_events_attrs, 582 }; 583 584 static const struct attribute_group iob_fast_pmu_v3_events_attr_group = { 585 .name = "events", 586 .attrs = iob_fast_pmu_v3_events_attrs, 587 }; 588 589 static const struct attribute_group iob_slow_pmu_v3_events_attr_group = { 590 .name = "events", 591 .attrs = iob_slow_pmu_v3_events_attrs, 592 }; 593 594 static const struct attribute_group mcb_pmu_v3_events_attr_group = { 595 .name = "events", 596 .attrs = mcb_pmu_v3_events_attrs, 597 }; 598 599 static const struct attribute_group mc_pmu_v3_events_attr_group = { 600 .name = "events", 601 .attrs = mc_pmu_v3_events_attrs, 602 }; 603 604 /* 605 * sysfs cpumask attributes 606 */ 607 static ssize_t xgene_pmu_cpumask_show(struct device *dev, 608 struct device_attribute *attr, char *buf) 609 { 610 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(dev_get_drvdata(dev)); 611 612 return cpumap_print_to_pagebuf(true, buf, &pmu_dev->parent->cpu); 613 } 614 615 static DEVICE_ATTR(cpumask, S_IRUGO, xgene_pmu_cpumask_show, NULL); 616 617 static struct attribute *xgene_pmu_cpumask_attrs[] = { 618 &dev_attr_cpumask.attr, 619 NULL, 620 }; 621 622 static const struct attribute_group pmu_cpumask_attr_group = { 623 .attrs = xgene_pmu_cpumask_attrs, 624 }; 625 626 /* 627 * Per PMU device attribute groups of PMU v1 and v2 628 */ 629 static const struct attribute_group *l3c_pmu_attr_groups[] = { 630 &l3c_pmu_format_attr_group, 631 &pmu_cpumask_attr_group, 632 &l3c_pmu_events_attr_group, 633 NULL 634 }; 635 636 static const struct attribute_group *iob_pmu_attr_groups[] = { 637 &iob_pmu_format_attr_group, 638 &pmu_cpumask_attr_group, 639 &iob_pmu_events_attr_group, 640 NULL 641 }; 642 643 static const struct attribute_group *mcb_pmu_attr_groups[] = { 644 &mcb_pmu_format_attr_group, 645 &pmu_cpumask_attr_group, 646 &mcb_pmu_events_attr_group, 647 NULL 648 }; 649 650 static const struct attribute_group *mc_pmu_attr_groups[] = { 651 &mc_pmu_format_attr_group, 652 &pmu_cpumask_attr_group, 653 &mc_pmu_events_attr_group, 654 NULL 655 }; 656 657 /* 658 * Per PMU device attribute groups of PMU v3 659 */ 660 static const struct attribute_group *l3c_pmu_v3_attr_groups[] = { 661 &l3c_pmu_v3_format_attr_group, 662 &pmu_cpumask_attr_group, 663 &l3c_pmu_v3_events_attr_group, 664 NULL 665 }; 666 667 static const struct attribute_group *iob_fast_pmu_v3_attr_groups[] = { 668 &iob_pmu_v3_format_attr_group, 669 &pmu_cpumask_attr_group, 670 &iob_fast_pmu_v3_events_attr_group, 671 NULL 672 }; 673 674 static const struct attribute_group *iob_slow_pmu_v3_attr_groups[] = { 675 &iob_slow_pmu_v3_format_attr_group, 676 &pmu_cpumask_attr_group, 677 &iob_slow_pmu_v3_events_attr_group, 678 NULL 679 }; 680 681 static const struct attribute_group *mcb_pmu_v3_attr_groups[] = { 682 &mcb_pmu_v3_format_attr_group, 683 &pmu_cpumask_attr_group, 684 &mcb_pmu_v3_events_attr_group, 685 NULL 686 }; 687 688 static const struct attribute_group *mc_pmu_v3_attr_groups[] = { 689 &mc_pmu_v3_format_attr_group, 690 &pmu_cpumask_attr_group, 691 &mc_pmu_v3_events_attr_group, 692 NULL 693 }; 694 695 static int get_next_avail_cntr(struct xgene_pmu_dev *pmu_dev) 696 { 697 int cntr; 698 699 cntr = find_first_zero_bit(pmu_dev->cntr_assign_mask, 700 pmu_dev->max_counters); 701 if (cntr == pmu_dev->max_counters) 702 return -ENOSPC; 703 set_bit(cntr, pmu_dev->cntr_assign_mask); 704 705 return cntr; 706 } 707 708 static void clear_avail_cntr(struct xgene_pmu_dev *pmu_dev, int cntr) 709 { 710 clear_bit(cntr, pmu_dev->cntr_assign_mask); 711 } 712 713 static inline void xgene_pmu_mask_int(struct xgene_pmu *xgene_pmu) 714 { 715 writel(PCPPMU_INTENMASK, xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG); 716 } 717 718 static inline void xgene_pmu_v3_mask_int(struct xgene_pmu *xgene_pmu) 719 { 720 writel(PCPPMU_V3_INTENMASK, xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG); 721 } 722 723 static inline void xgene_pmu_unmask_int(struct xgene_pmu *xgene_pmu) 724 { 725 writel(PCPPMU_INTCLRMASK, xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG); 726 } 727 728 static inline void xgene_pmu_v3_unmask_int(struct xgene_pmu *xgene_pmu) 729 { 730 writel(PCPPMU_V3_INTCLRMASK, 731 xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG); 732 } 733 734 static inline u64 xgene_pmu_read_counter32(struct xgene_pmu_dev *pmu_dev, 735 int idx) 736 { 737 return readl(pmu_dev->inf->csr + PMU_PMEVCNTR0 + (4 * idx)); 738 } 739 740 static inline u64 xgene_pmu_read_counter64(struct xgene_pmu_dev *pmu_dev, 741 int idx) 742 { 743 u32 lo, hi; 744 745 /* 746 * v3 has 64-bit counter registers composed by 2 32-bit registers 747 * This can be a problem if the counter increases and carries 748 * out of bit [31] between 2 reads. The extra reads would help 749 * to prevent this issue. 750 */ 751 do { 752 hi = xgene_pmu_read_counter32(pmu_dev, 2 * idx + 1); 753 lo = xgene_pmu_read_counter32(pmu_dev, 2 * idx); 754 } while (hi != xgene_pmu_read_counter32(pmu_dev, 2 * idx + 1)); 755 756 return (((u64)hi << 32) | lo); 757 } 758 759 static inline void 760 xgene_pmu_write_counter32(struct xgene_pmu_dev *pmu_dev, int idx, u64 val) 761 { 762 writel(val, pmu_dev->inf->csr + PMU_PMEVCNTR0 + (4 * idx)); 763 } 764 765 static inline void 766 xgene_pmu_write_counter64(struct xgene_pmu_dev *pmu_dev, int idx, u64 val) 767 { 768 u32 cnt_lo, cnt_hi; 769 770 cnt_hi = upper_32_bits(val); 771 cnt_lo = lower_32_bits(val); 772 773 /* v3 has 64-bit counter registers composed by 2 32-bit registers */ 774 xgene_pmu_write_counter32(pmu_dev, 2 * idx, cnt_lo); 775 xgene_pmu_write_counter32(pmu_dev, 2 * idx + 1, cnt_hi); 776 } 777 778 static inline void 779 xgene_pmu_write_evttype(struct xgene_pmu_dev *pmu_dev, int idx, u32 val) 780 { 781 writel(val, pmu_dev->inf->csr + PMU_PMEVTYPER0 + (4 * idx)); 782 } 783 784 static inline void 785 xgene_pmu_write_agentmsk(struct xgene_pmu_dev *pmu_dev, u32 val) 786 { 787 writel(val, pmu_dev->inf->csr + PMU_PMAMR0); 788 } 789 790 static inline void 791 xgene_pmu_v3_write_agentmsk(struct xgene_pmu_dev *pmu_dev, u32 val) { } 792 793 static inline void 794 xgene_pmu_write_agent1msk(struct xgene_pmu_dev *pmu_dev, u32 val) 795 { 796 writel(val, pmu_dev->inf->csr + PMU_PMAMR1); 797 } 798 799 static inline void 800 xgene_pmu_v3_write_agent1msk(struct xgene_pmu_dev *pmu_dev, u32 val) { } 801 802 static inline void 803 xgene_pmu_enable_counter(struct xgene_pmu_dev *pmu_dev, int idx) 804 { 805 u32 val; 806 807 val = readl(pmu_dev->inf->csr + PMU_PMCNTENSET); 808 val |= 1 << idx; 809 writel(val, pmu_dev->inf->csr + PMU_PMCNTENSET); 810 } 811 812 static inline void 813 xgene_pmu_disable_counter(struct xgene_pmu_dev *pmu_dev, int idx) 814 { 815 u32 val; 816 817 val = readl(pmu_dev->inf->csr + PMU_PMCNTENCLR); 818 val |= 1 << idx; 819 writel(val, pmu_dev->inf->csr + PMU_PMCNTENCLR); 820 } 821 822 static inline void 823 xgene_pmu_enable_counter_int(struct xgene_pmu_dev *pmu_dev, int idx) 824 { 825 u32 val; 826 827 val = readl(pmu_dev->inf->csr + PMU_PMINTENSET); 828 val |= 1 << idx; 829 writel(val, pmu_dev->inf->csr + PMU_PMINTENSET); 830 } 831 832 static inline void 833 xgene_pmu_disable_counter_int(struct xgene_pmu_dev *pmu_dev, int idx) 834 { 835 u32 val; 836 837 val = readl(pmu_dev->inf->csr + PMU_PMINTENCLR); 838 val |= 1 << idx; 839 writel(val, pmu_dev->inf->csr + PMU_PMINTENCLR); 840 } 841 842 static inline void xgene_pmu_reset_counters(struct xgene_pmu_dev *pmu_dev) 843 { 844 u32 val; 845 846 val = readl(pmu_dev->inf->csr + PMU_PMCR); 847 val |= PMU_PMCR_P; 848 writel(val, pmu_dev->inf->csr + PMU_PMCR); 849 } 850 851 static inline void xgene_pmu_start_counters(struct xgene_pmu_dev *pmu_dev) 852 { 853 u32 val; 854 855 val = readl(pmu_dev->inf->csr + PMU_PMCR); 856 val |= PMU_PMCR_E; 857 writel(val, pmu_dev->inf->csr + PMU_PMCR); 858 } 859 860 static inline void xgene_pmu_stop_counters(struct xgene_pmu_dev *pmu_dev) 861 { 862 u32 val; 863 864 val = readl(pmu_dev->inf->csr + PMU_PMCR); 865 val &= ~PMU_PMCR_E; 866 writel(val, pmu_dev->inf->csr + PMU_PMCR); 867 } 868 869 static void xgene_perf_pmu_enable(struct pmu *pmu) 870 { 871 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(pmu); 872 struct xgene_pmu *xgene_pmu = pmu_dev->parent; 873 int enabled = bitmap_weight(pmu_dev->cntr_assign_mask, 874 pmu_dev->max_counters); 875 876 if (!enabled) 877 return; 878 879 xgene_pmu->ops->start_counters(pmu_dev); 880 } 881 882 static void xgene_perf_pmu_disable(struct pmu *pmu) 883 { 884 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(pmu); 885 struct xgene_pmu *xgene_pmu = pmu_dev->parent; 886 887 xgene_pmu->ops->stop_counters(pmu_dev); 888 } 889 890 static int xgene_perf_event_init(struct perf_event *event) 891 { 892 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu); 893 struct hw_perf_event *hw = &event->hw; 894 struct perf_event *sibling; 895 896 /* Test the event attr type check for PMU enumeration */ 897 if (event->attr.type != event->pmu->type) 898 return -ENOENT; 899 900 /* 901 * SOC PMU counters are shared across all cores. 902 * Therefore, it does not support per-process mode. 903 * Also, it does not support event sampling mode. 904 */ 905 if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK) 906 return -EINVAL; 907 908 if (event->cpu < 0) 909 return -EINVAL; 910 /* 911 * Many perf core operations (eg. events rotation) operate on a 912 * single CPU context. This is obvious for CPU PMUs, where one 913 * expects the same sets of events being observed on all CPUs, 914 * but can lead to issues for off-core PMUs, where each 915 * event could be theoretically assigned to a different CPU. To 916 * mitigate this, we enforce CPU assignment to one, selected 917 * processor (the one described in the "cpumask" attribute). 918 */ 919 event->cpu = cpumask_first(&pmu_dev->parent->cpu); 920 921 hw->config = event->attr.config; 922 /* 923 * Each bit of the config1 field represents an agent from which the 924 * request of the event come. The event is counted only if it's caused 925 * by a request of an agent has the bit cleared. 926 * By default, the event is counted for all agents. 927 */ 928 hw->config_base = event->attr.config1; 929 930 /* 931 * We must NOT create groups containing mixed PMUs, although software 932 * events are acceptable 933 */ 934 if (event->group_leader->pmu != event->pmu && 935 !is_software_event(event->group_leader)) 936 return -EINVAL; 937 938 for_each_sibling_event(sibling, event->group_leader) { 939 if (sibling->pmu != event->pmu && 940 !is_software_event(sibling)) 941 return -EINVAL; 942 } 943 944 return 0; 945 } 946 947 static void xgene_perf_enable_event(struct perf_event *event) 948 { 949 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu); 950 struct xgene_pmu *xgene_pmu = pmu_dev->parent; 951 952 xgene_pmu->ops->write_evttype(pmu_dev, GET_CNTR(event), 953 GET_EVENTID(event)); 954 xgene_pmu->ops->write_agentmsk(pmu_dev, ~((u32)GET_AGENTID(event))); 955 if (pmu_dev->inf->type == PMU_TYPE_IOB) 956 xgene_pmu->ops->write_agent1msk(pmu_dev, 957 ~((u32)GET_AGENT1ID(event))); 958 959 xgene_pmu->ops->enable_counter(pmu_dev, GET_CNTR(event)); 960 xgene_pmu->ops->enable_counter_int(pmu_dev, GET_CNTR(event)); 961 } 962 963 static void xgene_perf_disable_event(struct perf_event *event) 964 { 965 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu); 966 struct xgene_pmu *xgene_pmu = pmu_dev->parent; 967 968 xgene_pmu->ops->disable_counter(pmu_dev, GET_CNTR(event)); 969 xgene_pmu->ops->disable_counter_int(pmu_dev, GET_CNTR(event)); 970 } 971 972 static void xgene_perf_event_set_period(struct perf_event *event) 973 { 974 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu); 975 struct xgene_pmu *xgene_pmu = pmu_dev->parent; 976 struct hw_perf_event *hw = &event->hw; 977 /* 978 * For 32 bit counter, it has a period of 2^32. To account for the 979 * possibility of extreme interrupt latency we program for a period of 980 * half that. Hopefully, we can handle the interrupt before another 2^31 981 * events occur and the counter overtakes its previous value. 982 * For 64 bit counter, we don't expect it overflow. 983 */ 984 u64 val = 1ULL << 31; 985 986 local64_set(&hw->prev_count, val); 987 xgene_pmu->ops->write_counter(pmu_dev, hw->idx, val); 988 } 989 990 static void xgene_perf_event_update(struct perf_event *event) 991 { 992 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu); 993 struct xgene_pmu *xgene_pmu = pmu_dev->parent; 994 struct hw_perf_event *hw = &event->hw; 995 u64 delta, prev_raw_count, new_raw_count; 996 997 again: 998 prev_raw_count = local64_read(&hw->prev_count); 999 new_raw_count = xgene_pmu->ops->read_counter(pmu_dev, GET_CNTR(event)); 1000 1001 if (local64_cmpxchg(&hw->prev_count, prev_raw_count, 1002 new_raw_count) != prev_raw_count) 1003 goto again; 1004 1005 delta = (new_raw_count - prev_raw_count) & pmu_dev->max_period; 1006 1007 local64_add(delta, &event->count); 1008 } 1009 1010 static void xgene_perf_read(struct perf_event *event) 1011 { 1012 xgene_perf_event_update(event); 1013 } 1014 1015 static void xgene_perf_start(struct perf_event *event, int flags) 1016 { 1017 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu); 1018 struct xgene_pmu *xgene_pmu = pmu_dev->parent; 1019 struct hw_perf_event *hw = &event->hw; 1020 1021 if (WARN_ON_ONCE(!(hw->state & PERF_HES_STOPPED))) 1022 return; 1023 1024 WARN_ON_ONCE(!(hw->state & PERF_HES_UPTODATE)); 1025 hw->state = 0; 1026 1027 xgene_perf_event_set_period(event); 1028 1029 if (flags & PERF_EF_RELOAD) { 1030 u64 prev_raw_count = local64_read(&hw->prev_count); 1031 1032 xgene_pmu->ops->write_counter(pmu_dev, GET_CNTR(event), 1033 prev_raw_count); 1034 } 1035 1036 xgene_perf_enable_event(event); 1037 perf_event_update_userpage(event); 1038 } 1039 1040 static void xgene_perf_stop(struct perf_event *event, int flags) 1041 { 1042 struct hw_perf_event *hw = &event->hw; 1043 1044 if (hw->state & PERF_HES_UPTODATE) 1045 return; 1046 1047 xgene_perf_disable_event(event); 1048 WARN_ON_ONCE(hw->state & PERF_HES_STOPPED); 1049 hw->state |= PERF_HES_STOPPED; 1050 1051 if (hw->state & PERF_HES_UPTODATE) 1052 return; 1053 1054 xgene_perf_read(event); 1055 hw->state |= PERF_HES_UPTODATE; 1056 } 1057 1058 static int xgene_perf_add(struct perf_event *event, int flags) 1059 { 1060 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu); 1061 struct hw_perf_event *hw = &event->hw; 1062 1063 hw->state = PERF_HES_UPTODATE | PERF_HES_STOPPED; 1064 1065 /* Allocate an event counter */ 1066 hw->idx = get_next_avail_cntr(pmu_dev); 1067 if (hw->idx < 0) 1068 return -EAGAIN; 1069 1070 /* Update counter event pointer for Interrupt handler */ 1071 pmu_dev->pmu_counter_event[hw->idx] = event; 1072 1073 if (flags & PERF_EF_START) 1074 xgene_perf_start(event, PERF_EF_RELOAD); 1075 1076 return 0; 1077 } 1078 1079 static void xgene_perf_del(struct perf_event *event, int flags) 1080 { 1081 struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu); 1082 struct hw_perf_event *hw = &event->hw; 1083 1084 xgene_perf_stop(event, PERF_EF_UPDATE); 1085 1086 /* clear the assigned counter */ 1087 clear_avail_cntr(pmu_dev, GET_CNTR(event)); 1088 1089 perf_event_update_userpage(event); 1090 pmu_dev->pmu_counter_event[hw->idx] = NULL; 1091 } 1092 1093 static int xgene_init_perf(struct xgene_pmu_dev *pmu_dev, char *name) 1094 { 1095 struct xgene_pmu *xgene_pmu; 1096 1097 if (pmu_dev->parent->version == PCP_PMU_V3) 1098 pmu_dev->max_period = PMU_V3_CNT_MAX_PERIOD; 1099 else 1100 pmu_dev->max_period = PMU_CNT_MAX_PERIOD; 1101 /* First version PMU supports only single event counter */ 1102 xgene_pmu = pmu_dev->parent; 1103 if (xgene_pmu->version == PCP_PMU_V1) 1104 pmu_dev->max_counters = 1; 1105 else 1106 pmu_dev->max_counters = PMU_MAX_COUNTERS; 1107 1108 /* Perf driver registration */ 1109 pmu_dev->pmu = (struct pmu) { 1110 .attr_groups = pmu_dev->attr_groups, 1111 .task_ctx_nr = perf_invalid_context, 1112 .pmu_enable = xgene_perf_pmu_enable, 1113 .pmu_disable = xgene_perf_pmu_disable, 1114 .event_init = xgene_perf_event_init, 1115 .add = xgene_perf_add, 1116 .del = xgene_perf_del, 1117 .start = xgene_perf_start, 1118 .stop = xgene_perf_stop, 1119 .read = xgene_perf_read, 1120 .capabilities = PERF_PMU_CAP_NO_EXCLUDE, 1121 }; 1122 1123 /* Hardware counter init */ 1124 xgene_pmu->ops->stop_counters(pmu_dev); 1125 xgene_pmu->ops->reset_counters(pmu_dev); 1126 1127 return perf_pmu_register(&pmu_dev->pmu, name, -1); 1128 } 1129 1130 static int 1131 xgene_pmu_dev_add(struct xgene_pmu *xgene_pmu, struct xgene_pmu_dev_ctx *ctx) 1132 { 1133 struct device *dev = xgene_pmu->dev; 1134 struct xgene_pmu_dev *pmu; 1135 1136 pmu = devm_kzalloc(dev, sizeof(*pmu), GFP_KERNEL); 1137 if (!pmu) 1138 return -ENOMEM; 1139 pmu->parent = xgene_pmu; 1140 pmu->inf = &ctx->inf; 1141 ctx->pmu_dev = pmu; 1142 1143 switch (pmu->inf->type) { 1144 case PMU_TYPE_L3C: 1145 if (!(xgene_pmu->l3c_active_mask & pmu->inf->enable_mask)) 1146 return -ENODEV; 1147 if (xgene_pmu->version == PCP_PMU_V3) 1148 pmu->attr_groups = l3c_pmu_v3_attr_groups; 1149 else 1150 pmu->attr_groups = l3c_pmu_attr_groups; 1151 break; 1152 case PMU_TYPE_IOB: 1153 if (xgene_pmu->version == PCP_PMU_V3) 1154 pmu->attr_groups = iob_fast_pmu_v3_attr_groups; 1155 else 1156 pmu->attr_groups = iob_pmu_attr_groups; 1157 break; 1158 case PMU_TYPE_IOB_SLOW: 1159 if (xgene_pmu->version == PCP_PMU_V3) 1160 pmu->attr_groups = iob_slow_pmu_v3_attr_groups; 1161 break; 1162 case PMU_TYPE_MCB: 1163 if (!(xgene_pmu->mcb_active_mask & pmu->inf->enable_mask)) 1164 return -ENODEV; 1165 if (xgene_pmu->version == PCP_PMU_V3) 1166 pmu->attr_groups = mcb_pmu_v3_attr_groups; 1167 else 1168 pmu->attr_groups = mcb_pmu_attr_groups; 1169 break; 1170 case PMU_TYPE_MC: 1171 if (!(xgene_pmu->mc_active_mask & pmu->inf->enable_mask)) 1172 return -ENODEV; 1173 if (xgene_pmu->version == PCP_PMU_V3) 1174 pmu->attr_groups = mc_pmu_v3_attr_groups; 1175 else 1176 pmu->attr_groups = mc_pmu_attr_groups; 1177 break; 1178 default: 1179 return -EINVAL; 1180 } 1181 1182 if (xgene_init_perf(pmu, ctx->name)) { 1183 dev_err(dev, "%s PMU: Failed to init perf driver\n", ctx->name); 1184 return -ENODEV; 1185 } 1186 1187 dev_info(dev, "%s PMU registered\n", ctx->name); 1188 1189 return 0; 1190 } 1191 1192 static void _xgene_pmu_isr(int irq, struct xgene_pmu_dev *pmu_dev) 1193 { 1194 struct xgene_pmu *xgene_pmu = pmu_dev->parent; 1195 void __iomem *csr = pmu_dev->inf->csr; 1196 u32 pmovsr; 1197 int idx; 1198 1199 xgene_pmu->ops->stop_counters(pmu_dev); 1200 1201 if (xgene_pmu->version == PCP_PMU_V3) 1202 pmovsr = readl(csr + PMU_PMOVSSET) & PMU_OVERFLOW_MASK; 1203 else 1204 pmovsr = readl(csr + PMU_PMOVSR) & PMU_OVERFLOW_MASK; 1205 1206 if (!pmovsr) 1207 goto out; 1208 1209 /* Clear interrupt flag */ 1210 if (xgene_pmu->version == PCP_PMU_V1) 1211 writel(0x0, csr + PMU_PMOVSR); 1212 else if (xgene_pmu->version == PCP_PMU_V2) 1213 writel(pmovsr, csr + PMU_PMOVSR); 1214 else 1215 writel(pmovsr, csr + PMU_PMOVSCLR); 1216 1217 for (idx = 0; idx < PMU_MAX_COUNTERS; idx++) { 1218 struct perf_event *event = pmu_dev->pmu_counter_event[idx]; 1219 int overflowed = pmovsr & BIT(idx); 1220 1221 /* Ignore if we don't have an event. */ 1222 if (!event || !overflowed) 1223 continue; 1224 xgene_perf_event_update(event); 1225 xgene_perf_event_set_period(event); 1226 } 1227 1228 out: 1229 xgene_pmu->ops->start_counters(pmu_dev); 1230 } 1231 1232 static irqreturn_t xgene_pmu_isr(int irq, void *dev_id) 1233 { 1234 u32 intr_mcu, intr_mcb, intr_l3c, intr_iob; 1235 struct xgene_pmu_dev_ctx *ctx; 1236 struct xgene_pmu *xgene_pmu = dev_id; 1237 unsigned long flags; 1238 u32 val; 1239 1240 raw_spin_lock_irqsave(&xgene_pmu->lock, flags); 1241 1242 /* Get Interrupt PMU source */ 1243 val = readl(xgene_pmu->pcppmu_csr + PCPPMU_INTSTATUS_REG); 1244 if (xgene_pmu->version == PCP_PMU_V3) { 1245 intr_mcu = PCPPMU_V3_INT_MCU; 1246 intr_mcb = PCPPMU_V3_INT_MCB; 1247 intr_l3c = PCPPMU_V3_INT_L3C; 1248 intr_iob = PCPPMU_V3_INT_IOB; 1249 } else { 1250 intr_mcu = PCPPMU_INT_MCU; 1251 intr_mcb = PCPPMU_INT_MCB; 1252 intr_l3c = PCPPMU_INT_L3C; 1253 intr_iob = PCPPMU_INT_IOB; 1254 } 1255 if (val & intr_mcu) { 1256 list_for_each_entry(ctx, &xgene_pmu->mcpmus, next) { 1257 _xgene_pmu_isr(irq, ctx->pmu_dev); 1258 } 1259 } 1260 if (val & intr_mcb) { 1261 list_for_each_entry(ctx, &xgene_pmu->mcbpmus, next) { 1262 _xgene_pmu_isr(irq, ctx->pmu_dev); 1263 } 1264 } 1265 if (val & intr_l3c) { 1266 list_for_each_entry(ctx, &xgene_pmu->l3cpmus, next) { 1267 _xgene_pmu_isr(irq, ctx->pmu_dev); 1268 } 1269 } 1270 if (val & intr_iob) { 1271 list_for_each_entry(ctx, &xgene_pmu->iobpmus, next) { 1272 _xgene_pmu_isr(irq, ctx->pmu_dev); 1273 } 1274 } 1275 1276 raw_spin_unlock_irqrestore(&xgene_pmu->lock, flags); 1277 1278 return IRQ_HANDLED; 1279 } 1280 1281 static int acpi_pmu_probe_active_mcb_mcu_l3c(struct xgene_pmu *xgene_pmu, 1282 struct platform_device *pdev) 1283 { 1284 void __iomem *csw_csr, *mcba_csr, *mcbb_csr; 1285 unsigned int reg; 1286 1287 csw_csr = devm_platform_ioremap_resource(pdev, 1); 1288 if (IS_ERR(csw_csr)) { 1289 dev_err(&pdev->dev, "ioremap failed for CSW CSR resource\n"); 1290 return PTR_ERR(csw_csr); 1291 } 1292 1293 mcba_csr = devm_platform_ioremap_resource(pdev, 2); 1294 if (IS_ERR(mcba_csr)) { 1295 dev_err(&pdev->dev, "ioremap failed for MCBA CSR resource\n"); 1296 return PTR_ERR(mcba_csr); 1297 } 1298 1299 mcbb_csr = devm_platform_ioremap_resource(pdev, 3); 1300 if (IS_ERR(mcbb_csr)) { 1301 dev_err(&pdev->dev, "ioremap failed for MCBB CSR resource\n"); 1302 return PTR_ERR(mcbb_csr); 1303 } 1304 1305 xgene_pmu->l3c_active_mask = 0x1; 1306 1307 reg = readl(csw_csr + CSW_CSWCR); 1308 if (reg & CSW_CSWCR_DUALMCB_MASK) { 1309 /* Dual MCB active */ 1310 xgene_pmu->mcb_active_mask = 0x3; 1311 /* Probe all active MC(s) */ 1312 reg = readl(mcbb_csr + CSW_CSWCR); 1313 xgene_pmu->mc_active_mask = 1314 (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0xF : 0x5; 1315 } else { 1316 /* Single MCB active */ 1317 xgene_pmu->mcb_active_mask = 0x1; 1318 /* Probe all active MC(s) */ 1319 reg = readl(mcba_csr + CSW_CSWCR); 1320 xgene_pmu->mc_active_mask = 1321 (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0x3 : 0x1; 1322 } 1323 1324 return 0; 1325 } 1326 1327 static int acpi_pmu_v3_probe_active_mcb_mcu_l3c(struct xgene_pmu *xgene_pmu, 1328 struct platform_device *pdev) 1329 { 1330 void __iomem *csw_csr; 1331 unsigned int reg; 1332 u32 mcb0routing; 1333 u32 mcb1routing; 1334 1335 csw_csr = devm_platform_ioremap_resource(pdev, 1); 1336 if (IS_ERR(csw_csr)) { 1337 dev_err(&pdev->dev, "ioremap failed for CSW CSR resource\n"); 1338 return PTR_ERR(csw_csr); 1339 } 1340 1341 reg = readl(csw_csr + CSW_CSWCR); 1342 mcb0routing = CSW_CSWCR_MCB0_ROUTING(reg); 1343 mcb1routing = CSW_CSWCR_MCB1_ROUTING(reg); 1344 if (reg & CSW_CSWCR_DUALMCB_MASK) { 1345 /* Dual MCB active */ 1346 xgene_pmu->mcb_active_mask = 0x3; 1347 /* Probe all active L3C(s), maximum is 8 */ 1348 xgene_pmu->l3c_active_mask = 0xFF; 1349 /* Probe all active MC(s), maximum is 8 */ 1350 if ((mcb0routing == 0x2) && (mcb1routing == 0x2)) 1351 xgene_pmu->mc_active_mask = 0xFF; 1352 else if ((mcb0routing == 0x1) && (mcb1routing == 0x1)) 1353 xgene_pmu->mc_active_mask = 0x33; 1354 else 1355 xgene_pmu->mc_active_mask = 0x11; 1356 } else { 1357 /* Single MCB active */ 1358 xgene_pmu->mcb_active_mask = 0x1; 1359 /* Probe all active L3C(s), maximum is 4 */ 1360 xgene_pmu->l3c_active_mask = 0x0F; 1361 /* Probe all active MC(s), maximum is 4 */ 1362 if (mcb0routing == 0x2) 1363 xgene_pmu->mc_active_mask = 0x0F; 1364 else if (mcb0routing == 0x1) 1365 xgene_pmu->mc_active_mask = 0x03; 1366 else 1367 xgene_pmu->mc_active_mask = 0x01; 1368 } 1369 1370 return 0; 1371 } 1372 1373 static int fdt_pmu_probe_active_mcb_mcu_l3c(struct xgene_pmu *xgene_pmu, 1374 struct platform_device *pdev) 1375 { 1376 struct regmap *csw_map, *mcba_map, *mcbb_map; 1377 struct device_node *np = pdev->dev.of_node; 1378 unsigned int reg; 1379 1380 csw_map = syscon_regmap_lookup_by_phandle(np, "regmap-csw"); 1381 if (IS_ERR(csw_map)) { 1382 dev_err(&pdev->dev, "unable to get syscon regmap csw\n"); 1383 return PTR_ERR(csw_map); 1384 } 1385 1386 mcba_map = syscon_regmap_lookup_by_phandle(np, "regmap-mcba"); 1387 if (IS_ERR(mcba_map)) { 1388 dev_err(&pdev->dev, "unable to get syscon regmap mcba\n"); 1389 return PTR_ERR(mcba_map); 1390 } 1391 1392 mcbb_map = syscon_regmap_lookup_by_phandle(np, "regmap-mcbb"); 1393 if (IS_ERR(mcbb_map)) { 1394 dev_err(&pdev->dev, "unable to get syscon regmap mcbb\n"); 1395 return PTR_ERR(mcbb_map); 1396 } 1397 1398 xgene_pmu->l3c_active_mask = 0x1; 1399 if (regmap_read(csw_map, CSW_CSWCR, ®)) 1400 return -EINVAL; 1401 1402 if (reg & CSW_CSWCR_DUALMCB_MASK) { 1403 /* Dual MCB active */ 1404 xgene_pmu->mcb_active_mask = 0x3; 1405 /* Probe all active MC(s) */ 1406 if (regmap_read(mcbb_map, MCBADDRMR, ®)) 1407 return 0; 1408 xgene_pmu->mc_active_mask = 1409 (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0xF : 0x5; 1410 } else { 1411 /* Single MCB active */ 1412 xgene_pmu->mcb_active_mask = 0x1; 1413 /* Probe all active MC(s) */ 1414 if (regmap_read(mcba_map, MCBADDRMR, ®)) 1415 return 0; 1416 xgene_pmu->mc_active_mask = 1417 (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0x3 : 0x1; 1418 } 1419 1420 return 0; 1421 } 1422 1423 static int xgene_pmu_probe_active_mcb_mcu_l3c(struct xgene_pmu *xgene_pmu, 1424 struct platform_device *pdev) 1425 { 1426 if (has_acpi_companion(&pdev->dev)) { 1427 if (xgene_pmu->version == PCP_PMU_V3) 1428 return acpi_pmu_v3_probe_active_mcb_mcu_l3c(xgene_pmu, 1429 pdev); 1430 else 1431 return acpi_pmu_probe_active_mcb_mcu_l3c(xgene_pmu, 1432 pdev); 1433 } 1434 return fdt_pmu_probe_active_mcb_mcu_l3c(xgene_pmu, pdev); 1435 } 1436 1437 static char *xgene_pmu_dev_name(struct device *dev, u32 type, int id) 1438 { 1439 switch (type) { 1440 case PMU_TYPE_L3C: 1441 return devm_kasprintf(dev, GFP_KERNEL, "l3c%d", id); 1442 case PMU_TYPE_IOB: 1443 return devm_kasprintf(dev, GFP_KERNEL, "iob%d", id); 1444 case PMU_TYPE_IOB_SLOW: 1445 return devm_kasprintf(dev, GFP_KERNEL, "iob_slow%d", id); 1446 case PMU_TYPE_MCB: 1447 return devm_kasprintf(dev, GFP_KERNEL, "mcb%d", id); 1448 case PMU_TYPE_MC: 1449 return devm_kasprintf(dev, GFP_KERNEL, "mc%d", id); 1450 default: 1451 return devm_kasprintf(dev, GFP_KERNEL, "unknown"); 1452 } 1453 } 1454 1455 #if defined(CONFIG_ACPI) 1456 static struct 1457 xgene_pmu_dev_ctx *acpi_get_pmu_hw_inf(struct xgene_pmu *xgene_pmu, 1458 struct acpi_device *adev, u32 type) 1459 { 1460 struct device *dev = xgene_pmu->dev; 1461 struct list_head resource_list; 1462 struct xgene_pmu_dev_ctx *ctx; 1463 const union acpi_object *obj; 1464 struct hw_pmu_info *inf; 1465 void __iomem *dev_csr; 1466 struct resource res; 1467 struct resource_entry *rentry; 1468 int enable_bit; 1469 int rc; 1470 1471 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); 1472 if (!ctx) 1473 return NULL; 1474 1475 INIT_LIST_HEAD(&resource_list); 1476 rc = acpi_dev_get_resources(adev, &resource_list, NULL, NULL); 1477 if (rc <= 0) { 1478 dev_err(dev, "PMU type %d: No resources found\n", type); 1479 return NULL; 1480 } 1481 1482 list_for_each_entry(rentry, &resource_list, node) { 1483 if (resource_type(rentry->res) == IORESOURCE_MEM) { 1484 res = *rentry->res; 1485 rentry = NULL; 1486 break; 1487 } 1488 } 1489 acpi_dev_free_resource_list(&resource_list); 1490 1491 if (rentry) { 1492 dev_err(dev, "PMU type %d: No memory resource found\n", type); 1493 return NULL; 1494 } 1495 1496 dev_csr = devm_ioremap_resource(dev, &res); 1497 if (IS_ERR(dev_csr)) { 1498 dev_err(dev, "PMU type %d: Fail to map resource\n", type); 1499 return NULL; 1500 } 1501 1502 /* A PMU device node without enable-bit-index is always enabled */ 1503 rc = acpi_dev_get_property(adev, "enable-bit-index", 1504 ACPI_TYPE_INTEGER, &obj); 1505 if (rc < 0) 1506 enable_bit = 0; 1507 else 1508 enable_bit = (int) obj->integer.value; 1509 1510 ctx->name = xgene_pmu_dev_name(dev, type, enable_bit); 1511 if (!ctx->name) { 1512 dev_err(dev, "PMU type %d: Fail to get device name\n", type); 1513 return NULL; 1514 } 1515 inf = &ctx->inf; 1516 inf->type = type; 1517 inf->csr = dev_csr; 1518 inf->enable_mask = 1 << enable_bit; 1519 1520 return ctx; 1521 } 1522 1523 static const struct acpi_device_id xgene_pmu_acpi_type_match[] = { 1524 {"APMC0D5D", PMU_TYPE_L3C}, 1525 {"APMC0D5E", PMU_TYPE_IOB}, 1526 {"APMC0D5F", PMU_TYPE_MCB}, 1527 {"APMC0D60", PMU_TYPE_MC}, 1528 {"APMC0D84", PMU_TYPE_L3C}, 1529 {"APMC0D85", PMU_TYPE_IOB}, 1530 {"APMC0D86", PMU_TYPE_IOB_SLOW}, 1531 {"APMC0D87", PMU_TYPE_MCB}, 1532 {"APMC0D88", PMU_TYPE_MC}, 1533 {}, 1534 }; 1535 1536 static const struct acpi_device_id *xgene_pmu_acpi_match_type( 1537 const struct acpi_device_id *ids, 1538 struct acpi_device *adev) 1539 { 1540 const struct acpi_device_id *match_id = NULL; 1541 const struct acpi_device_id *id; 1542 1543 for (id = ids; id->id[0] || id->cls; id++) { 1544 if (!acpi_match_device_ids(adev, id)) 1545 match_id = id; 1546 else if (match_id) 1547 break; 1548 } 1549 1550 return match_id; 1551 } 1552 1553 static acpi_status acpi_pmu_dev_add(acpi_handle handle, u32 level, 1554 void *data, void **return_value) 1555 { 1556 const struct acpi_device_id *acpi_id; 1557 struct xgene_pmu *xgene_pmu = data; 1558 struct xgene_pmu_dev_ctx *ctx; 1559 struct acpi_device *adev; 1560 1561 if (acpi_bus_get_device(handle, &adev)) 1562 return AE_OK; 1563 if (acpi_bus_get_status(adev) || !adev->status.present) 1564 return AE_OK; 1565 1566 acpi_id = xgene_pmu_acpi_match_type(xgene_pmu_acpi_type_match, adev); 1567 if (!acpi_id) 1568 return AE_OK; 1569 1570 ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, (u32)acpi_id->driver_data); 1571 if (!ctx) 1572 return AE_OK; 1573 1574 if (xgene_pmu_dev_add(xgene_pmu, ctx)) { 1575 /* Can't add the PMU device, skip it */ 1576 devm_kfree(xgene_pmu->dev, ctx); 1577 return AE_OK; 1578 } 1579 1580 switch (ctx->inf.type) { 1581 case PMU_TYPE_L3C: 1582 list_add(&ctx->next, &xgene_pmu->l3cpmus); 1583 break; 1584 case PMU_TYPE_IOB: 1585 list_add(&ctx->next, &xgene_pmu->iobpmus); 1586 break; 1587 case PMU_TYPE_IOB_SLOW: 1588 list_add(&ctx->next, &xgene_pmu->iobpmus); 1589 break; 1590 case PMU_TYPE_MCB: 1591 list_add(&ctx->next, &xgene_pmu->mcbpmus); 1592 break; 1593 case PMU_TYPE_MC: 1594 list_add(&ctx->next, &xgene_pmu->mcpmus); 1595 break; 1596 } 1597 return AE_OK; 1598 } 1599 1600 static int acpi_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu, 1601 struct platform_device *pdev) 1602 { 1603 struct device *dev = xgene_pmu->dev; 1604 acpi_handle handle; 1605 acpi_status status; 1606 1607 handle = ACPI_HANDLE(dev); 1608 if (!handle) 1609 return -EINVAL; 1610 1611 status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1, 1612 acpi_pmu_dev_add, NULL, xgene_pmu, NULL); 1613 if (ACPI_FAILURE(status)) { 1614 dev_err(dev, "failed to probe PMU devices\n"); 1615 return -ENODEV; 1616 } 1617 1618 return 0; 1619 } 1620 #else 1621 static int acpi_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu, 1622 struct platform_device *pdev) 1623 { 1624 return 0; 1625 } 1626 #endif 1627 1628 static struct 1629 xgene_pmu_dev_ctx *fdt_get_pmu_hw_inf(struct xgene_pmu *xgene_pmu, 1630 struct device_node *np, u32 type) 1631 { 1632 struct device *dev = xgene_pmu->dev; 1633 struct xgene_pmu_dev_ctx *ctx; 1634 struct hw_pmu_info *inf; 1635 void __iomem *dev_csr; 1636 struct resource res; 1637 int enable_bit; 1638 1639 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); 1640 if (!ctx) 1641 return NULL; 1642 1643 if (of_address_to_resource(np, 0, &res) < 0) { 1644 dev_err(dev, "PMU type %d: No resource address found\n", type); 1645 return NULL; 1646 } 1647 1648 dev_csr = devm_ioremap_resource(dev, &res); 1649 if (IS_ERR(dev_csr)) { 1650 dev_err(dev, "PMU type %d: Fail to map resource\n", type); 1651 return NULL; 1652 } 1653 1654 /* A PMU device node without enable-bit-index is always enabled */ 1655 if (of_property_read_u32(np, "enable-bit-index", &enable_bit)) 1656 enable_bit = 0; 1657 1658 ctx->name = xgene_pmu_dev_name(dev, type, enable_bit); 1659 if (!ctx->name) { 1660 dev_err(dev, "PMU type %d: Fail to get device name\n", type); 1661 return NULL; 1662 } 1663 1664 inf = &ctx->inf; 1665 inf->type = type; 1666 inf->csr = dev_csr; 1667 inf->enable_mask = 1 << enable_bit; 1668 1669 return ctx; 1670 } 1671 1672 static int fdt_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu, 1673 struct platform_device *pdev) 1674 { 1675 struct xgene_pmu_dev_ctx *ctx; 1676 struct device_node *np; 1677 1678 for_each_child_of_node(pdev->dev.of_node, np) { 1679 if (!of_device_is_available(np)) 1680 continue; 1681 1682 if (of_device_is_compatible(np, "apm,xgene-pmu-l3c")) 1683 ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_L3C); 1684 else if (of_device_is_compatible(np, "apm,xgene-pmu-iob")) 1685 ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_IOB); 1686 else if (of_device_is_compatible(np, "apm,xgene-pmu-mcb")) 1687 ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_MCB); 1688 else if (of_device_is_compatible(np, "apm,xgene-pmu-mc")) 1689 ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_MC); 1690 else 1691 ctx = NULL; 1692 1693 if (!ctx) 1694 continue; 1695 1696 if (xgene_pmu_dev_add(xgene_pmu, ctx)) { 1697 /* Can't add the PMU device, skip it */ 1698 devm_kfree(xgene_pmu->dev, ctx); 1699 continue; 1700 } 1701 1702 switch (ctx->inf.type) { 1703 case PMU_TYPE_L3C: 1704 list_add(&ctx->next, &xgene_pmu->l3cpmus); 1705 break; 1706 case PMU_TYPE_IOB: 1707 list_add(&ctx->next, &xgene_pmu->iobpmus); 1708 break; 1709 case PMU_TYPE_IOB_SLOW: 1710 list_add(&ctx->next, &xgene_pmu->iobpmus); 1711 break; 1712 case PMU_TYPE_MCB: 1713 list_add(&ctx->next, &xgene_pmu->mcbpmus); 1714 break; 1715 case PMU_TYPE_MC: 1716 list_add(&ctx->next, &xgene_pmu->mcpmus); 1717 break; 1718 } 1719 } 1720 1721 return 0; 1722 } 1723 1724 static int xgene_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu, 1725 struct platform_device *pdev) 1726 { 1727 if (has_acpi_companion(&pdev->dev)) 1728 return acpi_pmu_probe_pmu_dev(xgene_pmu, pdev); 1729 return fdt_pmu_probe_pmu_dev(xgene_pmu, pdev); 1730 } 1731 1732 static const struct xgene_pmu_data xgene_pmu_data = { 1733 .id = PCP_PMU_V1, 1734 }; 1735 1736 static const struct xgene_pmu_data xgene_pmu_v2_data = { 1737 .id = PCP_PMU_V2, 1738 }; 1739 1740 static const struct xgene_pmu_ops xgene_pmu_ops = { 1741 .mask_int = xgene_pmu_mask_int, 1742 .unmask_int = xgene_pmu_unmask_int, 1743 .read_counter = xgene_pmu_read_counter32, 1744 .write_counter = xgene_pmu_write_counter32, 1745 .write_evttype = xgene_pmu_write_evttype, 1746 .write_agentmsk = xgene_pmu_write_agentmsk, 1747 .write_agent1msk = xgene_pmu_write_agent1msk, 1748 .enable_counter = xgene_pmu_enable_counter, 1749 .disable_counter = xgene_pmu_disable_counter, 1750 .enable_counter_int = xgene_pmu_enable_counter_int, 1751 .disable_counter_int = xgene_pmu_disable_counter_int, 1752 .reset_counters = xgene_pmu_reset_counters, 1753 .start_counters = xgene_pmu_start_counters, 1754 .stop_counters = xgene_pmu_stop_counters, 1755 }; 1756 1757 static const struct xgene_pmu_ops xgene_pmu_v3_ops = { 1758 .mask_int = xgene_pmu_v3_mask_int, 1759 .unmask_int = xgene_pmu_v3_unmask_int, 1760 .read_counter = xgene_pmu_read_counter64, 1761 .write_counter = xgene_pmu_write_counter64, 1762 .write_evttype = xgene_pmu_write_evttype, 1763 .write_agentmsk = xgene_pmu_v3_write_agentmsk, 1764 .write_agent1msk = xgene_pmu_v3_write_agent1msk, 1765 .enable_counter = xgene_pmu_enable_counter, 1766 .disable_counter = xgene_pmu_disable_counter, 1767 .enable_counter_int = xgene_pmu_enable_counter_int, 1768 .disable_counter_int = xgene_pmu_disable_counter_int, 1769 .reset_counters = xgene_pmu_reset_counters, 1770 .start_counters = xgene_pmu_start_counters, 1771 .stop_counters = xgene_pmu_stop_counters, 1772 }; 1773 1774 static const struct of_device_id xgene_pmu_of_match[] = { 1775 { .compatible = "apm,xgene-pmu", .data = &xgene_pmu_data }, 1776 { .compatible = "apm,xgene-pmu-v2", .data = &xgene_pmu_v2_data }, 1777 {}, 1778 }; 1779 MODULE_DEVICE_TABLE(of, xgene_pmu_of_match); 1780 #ifdef CONFIG_ACPI 1781 static const struct acpi_device_id xgene_pmu_acpi_match[] = { 1782 {"APMC0D5B", PCP_PMU_V1}, 1783 {"APMC0D5C", PCP_PMU_V2}, 1784 {"APMC0D83", PCP_PMU_V3}, 1785 {}, 1786 }; 1787 MODULE_DEVICE_TABLE(acpi, xgene_pmu_acpi_match); 1788 #endif 1789 1790 static int xgene_pmu_online_cpu(unsigned int cpu, struct hlist_node *node) 1791 { 1792 struct xgene_pmu *xgene_pmu = hlist_entry_safe(node, struct xgene_pmu, 1793 node); 1794 1795 if (cpumask_empty(&xgene_pmu->cpu)) 1796 cpumask_set_cpu(cpu, &xgene_pmu->cpu); 1797 1798 /* Overflow interrupt also should use the same CPU */ 1799 WARN_ON(irq_set_affinity(xgene_pmu->irq, &xgene_pmu->cpu)); 1800 1801 return 0; 1802 } 1803 1804 static int xgene_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node) 1805 { 1806 struct xgene_pmu *xgene_pmu = hlist_entry_safe(node, struct xgene_pmu, 1807 node); 1808 struct xgene_pmu_dev_ctx *ctx; 1809 unsigned int target; 1810 1811 if (!cpumask_test_and_clear_cpu(cpu, &xgene_pmu->cpu)) 1812 return 0; 1813 target = cpumask_any_but(cpu_online_mask, cpu); 1814 if (target >= nr_cpu_ids) 1815 return 0; 1816 1817 list_for_each_entry(ctx, &xgene_pmu->mcpmus, next) { 1818 perf_pmu_migrate_context(&ctx->pmu_dev->pmu, cpu, target); 1819 } 1820 list_for_each_entry(ctx, &xgene_pmu->mcbpmus, next) { 1821 perf_pmu_migrate_context(&ctx->pmu_dev->pmu, cpu, target); 1822 } 1823 list_for_each_entry(ctx, &xgene_pmu->l3cpmus, next) { 1824 perf_pmu_migrate_context(&ctx->pmu_dev->pmu, cpu, target); 1825 } 1826 list_for_each_entry(ctx, &xgene_pmu->iobpmus, next) { 1827 perf_pmu_migrate_context(&ctx->pmu_dev->pmu, cpu, target); 1828 } 1829 1830 cpumask_set_cpu(target, &xgene_pmu->cpu); 1831 /* Overflow interrupt also should use the same CPU */ 1832 WARN_ON(irq_set_affinity(xgene_pmu->irq, &xgene_pmu->cpu)); 1833 1834 return 0; 1835 } 1836 1837 static int xgene_pmu_probe(struct platform_device *pdev) 1838 { 1839 const struct xgene_pmu_data *dev_data; 1840 const struct of_device_id *of_id; 1841 struct xgene_pmu *xgene_pmu; 1842 struct resource *res; 1843 int irq, rc; 1844 int version; 1845 1846 /* Install a hook to update the reader CPU in case it goes offline */ 1847 rc = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE, 1848 "CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE", 1849 xgene_pmu_online_cpu, 1850 xgene_pmu_offline_cpu); 1851 if (rc) 1852 return rc; 1853 1854 xgene_pmu = devm_kzalloc(&pdev->dev, sizeof(*xgene_pmu), GFP_KERNEL); 1855 if (!xgene_pmu) 1856 return -ENOMEM; 1857 xgene_pmu->dev = &pdev->dev; 1858 platform_set_drvdata(pdev, xgene_pmu); 1859 1860 version = -EINVAL; 1861 of_id = of_match_device(xgene_pmu_of_match, &pdev->dev); 1862 if (of_id) { 1863 dev_data = (const struct xgene_pmu_data *) of_id->data; 1864 version = dev_data->id; 1865 } 1866 1867 #ifdef CONFIG_ACPI 1868 if (ACPI_COMPANION(&pdev->dev)) { 1869 const struct acpi_device_id *acpi_id; 1870 1871 acpi_id = acpi_match_device(xgene_pmu_acpi_match, &pdev->dev); 1872 if (acpi_id) 1873 version = (int) acpi_id->driver_data; 1874 } 1875 #endif 1876 if (version < 0) 1877 return -ENODEV; 1878 1879 if (version == PCP_PMU_V3) 1880 xgene_pmu->ops = &xgene_pmu_v3_ops; 1881 else 1882 xgene_pmu->ops = &xgene_pmu_ops; 1883 1884 INIT_LIST_HEAD(&xgene_pmu->l3cpmus); 1885 INIT_LIST_HEAD(&xgene_pmu->iobpmus); 1886 INIT_LIST_HEAD(&xgene_pmu->mcbpmus); 1887 INIT_LIST_HEAD(&xgene_pmu->mcpmus); 1888 1889 xgene_pmu->version = version; 1890 dev_info(&pdev->dev, "X-Gene PMU version %d\n", xgene_pmu->version); 1891 1892 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1893 xgene_pmu->pcppmu_csr = devm_ioremap_resource(&pdev->dev, res); 1894 if (IS_ERR(xgene_pmu->pcppmu_csr)) { 1895 dev_err(&pdev->dev, "ioremap failed for PCP PMU resource\n"); 1896 return PTR_ERR(xgene_pmu->pcppmu_csr); 1897 } 1898 1899 irq = platform_get_irq(pdev, 0); 1900 if (irq < 0) 1901 return -EINVAL; 1902 1903 rc = devm_request_irq(&pdev->dev, irq, xgene_pmu_isr, 1904 IRQF_NOBALANCING | IRQF_NO_THREAD, 1905 dev_name(&pdev->dev), xgene_pmu); 1906 if (rc) { 1907 dev_err(&pdev->dev, "Could not request IRQ %d\n", irq); 1908 return rc; 1909 } 1910 1911 xgene_pmu->irq = irq; 1912 1913 raw_spin_lock_init(&xgene_pmu->lock); 1914 1915 /* Check for active MCBs and MCUs */ 1916 rc = xgene_pmu_probe_active_mcb_mcu_l3c(xgene_pmu, pdev); 1917 if (rc) { 1918 dev_warn(&pdev->dev, "Unknown MCB/MCU active status\n"); 1919 xgene_pmu->mcb_active_mask = 0x1; 1920 xgene_pmu->mc_active_mask = 0x1; 1921 } 1922 1923 /* Add this instance to the list used by the hotplug callback */ 1924 rc = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE, 1925 &xgene_pmu->node); 1926 if (rc) { 1927 dev_err(&pdev->dev, "Error %d registering hotplug", rc); 1928 return rc; 1929 } 1930 1931 /* Walk through the tree for all PMU perf devices */ 1932 rc = xgene_pmu_probe_pmu_dev(xgene_pmu, pdev); 1933 if (rc) { 1934 dev_err(&pdev->dev, "No PMU perf devices found!\n"); 1935 goto out_unregister; 1936 } 1937 1938 /* Enable interrupt */ 1939 xgene_pmu->ops->unmask_int(xgene_pmu); 1940 1941 return 0; 1942 1943 out_unregister: 1944 cpuhp_state_remove_instance(CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE, 1945 &xgene_pmu->node); 1946 return rc; 1947 } 1948 1949 static void 1950 xgene_pmu_dev_cleanup(struct xgene_pmu *xgene_pmu, struct list_head *pmus) 1951 { 1952 struct xgene_pmu_dev_ctx *ctx; 1953 1954 list_for_each_entry(ctx, pmus, next) { 1955 perf_pmu_unregister(&ctx->pmu_dev->pmu); 1956 } 1957 } 1958 1959 static int xgene_pmu_remove(struct platform_device *pdev) 1960 { 1961 struct xgene_pmu *xgene_pmu = dev_get_drvdata(&pdev->dev); 1962 1963 xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->l3cpmus); 1964 xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->iobpmus); 1965 xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->mcbpmus); 1966 xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->mcpmus); 1967 cpuhp_state_remove_instance(CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE, 1968 &xgene_pmu->node); 1969 1970 return 0; 1971 } 1972 1973 static struct platform_driver xgene_pmu_driver = { 1974 .probe = xgene_pmu_probe, 1975 .remove = xgene_pmu_remove, 1976 .driver = { 1977 .name = "xgene-pmu", 1978 .of_match_table = xgene_pmu_of_match, 1979 .acpi_match_table = ACPI_PTR(xgene_pmu_acpi_match), 1980 .suppress_bind_attrs = true, 1981 }, 1982 }; 1983 1984 builtin_platform_driver(xgene_pmu_driver); 1985