1 // SPDX-License-Identifier: GPL-2.0
2 // CCI Cache Coherent Interconnect PMU driver
3 // Copyright (C) 2013-2018 Arm Ltd.
6 #include <linux/arm-cci.h>
8 #include <linux/interrupt.h>
9 #include <linux/module.h>
10 #include <linux/of_address.h>
11 #include <linux/of_device.h>
12 #include <linux/of_irq.h>
13 #include <linux/of_platform.h>
14 #include <linux/perf_event.h>
15 #include <linux/platform_device.h>
16 #include <linux/slab.h>
17 #include <linux/spinlock.h>
19 #define DRIVER_NAME "ARM-CCI PMU"
21 #define CCI_PMCR 0x0100
22 #define CCI_PID2 0x0fe8
24 #define CCI_PMCR_CEN 0x00000001
25 #define CCI_PMCR_NCNT_MASK 0x0000f800
26 #define CCI_PMCR_NCNT_SHIFT 11
28 #define CCI_PID2_REV_MASK 0xf0
29 #define CCI_PID2_REV_SHIFT 4
31 #define CCI_PMU_EVT_SEL 0x000
32 #define CCI_PMU_CNTR 0x004
33 #define CCI_PMU_CNTR_CTRL 0x008
34 #define CCI_PMU_OVRFLW 0x00c
36 #define CCI_PMU_OVRFLW_FLAG 1
38 #define CCI_PMU_CNTR_SIZE(model) ((model)->cntr_size)
39 #define CCI_PMU_CNTR_BASE(model, idx) ((idx) * CCI_PMU_CNTR_SIZE(model))
40 #define CCI_PMU_CNTR_MASK ((1ULL << 32) -1)
41 #define CCI_PMU_CNTR_LAST(cci_pmu) (cci_pmu->num_cntrs - 1)
43 #define CCI_PMU_MAX_HW_CNTRS(model) \
44 ((model)->num_hw_cntrs + (model)->fixed_hw_cntrs)
46 /* Types of interfaces that can generate events */
50 #ifdef CONFIG_ARM_CCI5xx_PMU
61 struct cci_pmu_hw_events {
62 struct perf_event **events;
63 unsigned long *used_mask;
64 raw_spinlock_t pmu_lock;
69 * struct cci_pmu_model:
70 * @fixed_hw_cntrs - Number of fixed event counters
71 * @num_hw_cntrs - Maximum number of programmable event counters
72 * @cntr_size - Size of an event counter mapping
74 struct cci_pmu_model {
79 struct attribute **format_attrs;
80 struct attribute **event_attrs;
81 struct event_range event_ranges[CCI_IF_MAX];
82 int (*validate_hw_event)(struct cci_pmu *, unsigned long);
83 int (*get_event_idx)(struct cci_pmu *, struct cci_pmu_hw_events *, unsigned long);
84 void (*write_counters)(struct cci_pmu *, unsigned long *);
87 static struct cci_pmu_model cci_pmu_models[];
91 void __iomem *ctrl_base;
96 unsigned long active_irqs;
97 const struct cci_pmu_model *model;
98 struct cci_pmu_hw_events hw_events;
99 struct platform_device *plat_device;
101 atomic_t active_events;
102 struct mutex reserve_mutex;
105 #define to_cci_pmu(c) (container_of(c, struct cci_pmu, pmu))
107 static struct cci_pmu *g_cci_pmu;
110 #ifdef CONFIG_ARM_CCI400_PMU
114 #ifdef CONFIG_ARM_CCI5xx_PMU
121 static void pmu_write_counters(struct cci_pmu *cci_pmu,
122 unsigned long *mask);
123 static ssize_t cci_pmu_format_show(struct device *dev,
124 struct device_attribute *attr, char *buf);
125 static ssize_t cci_pmu_event_show(struct device *dev,
126 struct device_attribute *attr, char *buf);
128 #define CCI_EXT_ATTR_ENTRY(_name, _func, _config) \
129 &((struct dev_ext_attribute[]) { \
130 { __ATTR(_name, S_IRUGO, _func, NULL), (void *)_config } \
133 #define CCI_FORMAT_EXT_ATTR_ENTRY(_name, _config) \
134 CCI_EXT_ATTR_ENTRY(_name, cci_pmu_format_show, (char *)_config)
135 #define CCI_EVENT_EXT_ATTR_ENTRY(_name, _config) \
136 CCI_EXT_ATTR_ENTRY(_name, cci_pmu_event_show, (unsigned long)_config)
138 /* CCI400 PMU Specific definitions */
140 #ifdef CONFIG_ARM_CCI400_PMU
143 #define CCI400_PORT_S0 0
144 #define CCI400_PORT_S1 1
145 #define CCI400_PORT_S2 2
146 #define CCI400_PORT_S3 3
147 #define CCI400_PORT_S4 4
148 #define CCI400_PORT_M0 5
149 #define CCI400_PORT_M1 6
150 #define CCI400_PORT_M2 7
152 #define CCI400_R1_PX 5
155 * Instead of an event id to monitor CCI cycles, a dedicated counter is
156 * provided. Use 0xff to represent CCI cycles and hope that no future revisions
157 * make use of this event in hardware.
159 enum cci400_perf_events {
160 CCI400_PMU_CYCLES = 0xff
163 #define CCI400_PMU_CYCLE_CNTR_IDX 0
164 #define CCI400_PMU_CNTR0_IDX 1
167 * CCI PMU event id is an 8-bit value made of two parts - bits 7:5 for one of 8
168 * ports and bits 4:0 are event codes. There are different event codes
169 * associated with each port type.
171 * Additionally, the range of events associated with the port types changed
172 * between Rev0 and Rev1.
174 * The constants below define the range of valid codes for each port type for
175 * the different revisions and are used to validate the event to be monitored.
178 #define CCI400_PMU_EVENT_MASK 0xffUL
179 #define CCI400_PMU_EVENT_SOURCE_SHIFT 5
180 #define CCI400_PMU_EVENT_SOURCE_MASK 0x7
181 #define CCI400_PMU_EVENT_CODE_SHIFT 0
182 #define CCI400_PMU_EVENT_CODE_MASK 0x1f
183 #define CCI400_PMU_EVENT_SOURCE(event) \
184 ((event >> CCI400_PMU_EVENT_SOURCE_SHIFT) & \
185 CCI400_PMU_EVENT_SOURCE_MASK)
186 #define CCI400_PMU_EVENT_CODE(event) \
187 ((event >> CCI400_PMU_EVENT_CODE_SHIFT) & CCI400_PMU_EVENT_CODE_MASK)
189 #define CCI400_R0_SLAVE_PORT_MIN_EV 0x00
190 #define CCI400_R0_SLAVE_PORT_MAX_EV 0x13
191 #define CCI400_R0_MASTER_PORT_MIN_EV 0x14
192 #define CCI400_R0_MASTER_PORT_MAX_EV 0x1a
194 #define CCI400_R1_SLAVE_PORT_MIN_EV 0x00
195 #define CCI400_R1_SLAVE_PORT_MAX_EV 0x14
196 #define CCI400_R1_MASTER_PORT_MIN_EV 0x00
197 #define CCI400_R1_MASTER_PORT_MAX_EV 0x11
199 #define CCI400_CYCLE_EVENT_EXT_ATTR_ENTRY(_name, _config) \
200 CCI_EXT_ATTR_ENTRY(_name, cci400_pmu_cycle_event_show, \
201 (unsigned long)_config)
203 static ssize_t cci400_pmu_cycle_event_show(struct device *dev,
204 struct device_attribute *attr, char *buf);
206 static struct attribute *cci400_pmu_format_attrs[] = {
207 CCI_FORMAT_EXT_ATTR_ENTRY(event, "config:0-4"),
208 CCI_FORMAT_EXT_ATTR_ENTRY(source, "config:5-7"),
212 static struct attribute *cci400_r0_pmu_event_attrs[] = {
214 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_any, 0x0),
215 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_device, 0x01),
216 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_normal_or_nonshareable, 0x2),
217 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_inner_or_outershareable, 0x3),
218 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_cache_maintenance, 0x4),
219 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_mem_barrier, 0x5),
220 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_sync_barrier, 0x6),
221 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg, 0x7),
222 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg_sync, 0x8),
223 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_stall_tt_full, 0x9),
224 CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_last_hs_snoop, 0xA),
225 CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_stall_rvalids_h_rready_l, 0xB),
226 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_any, 0xC),
227 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_device, 0xD),
228 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_normal_or_nonshareable, 0xE),
229 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_inner_or_outershare_wback_wclean, 0xF),
230 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_write_unique, 0x10),
231 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_write_line_unique, 0x11),
232 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_evict, 0x12),
233 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_stall_tt_full, 0x13),
235 CCI_EVENT_EXT_ATTR_ENTRY(mi_retry_speculative_fetch, 0x14),
236 CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_addr_hazard, 0x15),
237 CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_id_hazard, 0x16),
238 CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_tt_full, 0x17),
239 CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_barrier_hazard, 0x18),
240 CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_barrier_hazard, 0x19),
241 CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_tt_full, 0x1A),
242 /* Special event for cycles counter */
243 CCI400_CYCLE_EVENT_EXT_ATTR_ENTRY(cycles, 0xff),
247 static struct attribute *cci400_r1_pmu_event_attrs[] = {
249 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_any, 0x0),
250 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_device, 0x01),
251 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_normal_or_nonshareable, 0x2),
252 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_inner_or_outershareable, 0x3),
253 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_cache_maintenance, 0x4),
254 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_mem_barrier, 0x5),
255 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_sync_barrier, 0x6),
256 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg, 0x7),
257 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg_sync, 0x8),
258 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_stall_tt_full, 0x9),
259 CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_last_hs_snoop, 0xA),
260 CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_stall_rvalids_h_rready_l, 0xB),
261 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_any, 0xC),
262 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_device, 0xD),
263 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_normal_or_nonshareable, 0xE),
264 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_inner_or_outershare_wback_wclean, 0xF),
265 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_write_unique, 0x10),
266 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_write_line_unique, 0x11),
267 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_evict, 0x12),
268 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_stall_tt_full, 0x13),
269 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_stall_slave_id_hazard, 0x14),
271 CCI_EVENT_EXT_ATTR_ENTRY(mi_retry_speculative_fetch, 0x0),
272 CCI_EVENT_EXT_ATTR_ENTRY(mi_stall_cycle_addr_hazard, 0x1),
273 CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_master_id_hazard, 0x2),
274 CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_hi_prio_rtq_full, 0x3),
275 CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_barrier_hazard, 0x4),
276 CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_barrier_hazard, 0x5),
277 CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_wtq_full, 0x6),
278 CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_low_prio_rtq_full, 0x7),
279 CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_mid_prio_rtq_full, 0x8),
280 CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_qvn_vn0, 0x9),
281 CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_qvn_vn1, 0xA),
282 CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_qvn_vn2, 0xB),
283 CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_qvn_vn3, 0xC),
284 CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_qvn_vn0, 0xD),
285 CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_qvn_vn1, 0xE),
286 CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_qvn_vn2, 0xF),
287 CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_qvn_vn3, 0x10),
288 CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_unique_or_line_unique_addr_hazard, 0x11),
289 /* Special event for cycles counter */
290 CCI400_CYCLE_EVENT_EXT_ATTR_ENTRY(cycles, 0xff),
294 static ssize_t cci400_pmu_cycle_event_show(struct device *dev,
295 struct device_attribute *attr, char *buf)
297 struct dev_ext_attribute *eattr = container_of(attr,
298 struct dev_ext_attribute, attr);
299 return snprintf(buf, PAGE_SIZE, "config=0x%lx\n", (unsigned long)eattr->var);
302 static int cci400_get_event_idx(struct cci_pmu *cci_pmu,
303 struct cci_pmu_hw_events *hw,
304 unsigned long cci_event)
308 /* cycles event idx is fixed */
309 if (cci_event == CCI400_PMU_CYCLES) {
310 if (test_and_set_bit(CCI400_PMU_CYCLE_CNTR_IDX, hw->used_mask))
313 return CCI400_PMU_CYCLE_CNTR_IDX;
316 for (idx = CCI400_PMU_CNTR0_IDX; idx <= CCI_PMU_CNTR_LAST(cci_pmu); ++idx)
317 if (!test_and_set_bit(idx, hw->used_mask))
320 /* No counters available */
324 static int cci400_validate_hw_event(struct cci_pmu *cci_pmu, unsigned long hw_event)
326 u8 ev_source = CCI400_PMU_EVENT_SOURCE(hw_event);
327 u8 ev_code = CCI400_PMU_EVENT_CODE(hw_event);
330 if (hw_event & ~CCI400_PMU_EVENT_MASK)
333 if (hw_event == CCI400_PMU_CYCLES)
342 /* Slave Interface */
343 if_type = CCI_IF_SLAVE;
348 /* Master Interface */
349 if_type = CCI_IF_MASTER;
355 if (ev_code >= cci_pmu->model->event_ranges[if_type].min &&
356 ev_code <= cci_pmu->model->event_ranges[if_type].max)
362 static int probe_cci400_revision(struct cci_pmu *cci_pmu)
365 rev = readl_relaxed(cci_pmu->ctrl_base + CCI_PID2) & CCI_PID2_REV_MASK;
366 rev >>= CCI_PID2_REV_SHIFT;
368 if (rev < CCI400_R1_PX)
374 static const struct cci_pmu_model *probe_cci_model(struct cci_pmu *cci_pmu)
376 if (platform_has_secure_cci_access())
377 return &cci_pmu_models[probe_cci400_revision(cci_pmu)];
380 #else /* !CONFIG_ARM_CCI400_PMU */
381 static inline struct cci_pmu_model *probe_cci_model(struct cci_pmu *cci_pmu)
385 #endif /* CONFIG_ARM_CCI400_PMU */
387 #ifdef CONFIG_ARM_CCI5xx_PMU
390 * CCI5xx PMU event id is an 9-bit value made of two parts.
391 * bits [8:5] - Source for the event
392 * bits [4:0] - Event code (specific to type of interface)
398 #define CCI5xx_PORT_S0 0x0
399 #define CCI5xx_PORT_S1 0x1
400 #define CCI5xx_PORT_S2 0x2
401 #define CCI5xx_PORT_S3 0x3
402 #define CCI5xx_PORT_S4 0x4
403 #define CCI5xx_PORT_S5 0x5
404 #define CCI5xx_PORT_S6 0x6
406 #define CCI5xx_PORT_M0 0x8
407 #define CCI5xx_PORT_M1 0x9
408 #define CCI5xx_PORT_M2 0xa
409 #define CCI5xx_PORT_M3 0xb
410 #define CCI5xx_PORT_M4 0xc
411 #define CCI5xx_PORT_M5 0xd
412 #define CCI5xx_PORT_M6 0xe
414 #define CCI5xx_PORT_GLOBAL 0xf
416 #define CCI5xx_PMU_EVENT_MASK 0x1ffUL
417 #define CCI5xx_PMU_EVENT_SOURCE_SHIFT 0x5
418 #define CCI5xx_PMU_EVENT_SOURCE_MASK 0xf
419 #define CCI5xx_PMU_EVENT_CODE_SHIFT 0x0
420 #define CCI5xx_PMU_EVENT_CODE_MASK 0x1f
422 #define CCI5xx_PMU_EVENT_SOURCE(event) \
423 ((event >> CCI5xx_PMU_EVENT_SOURCE_SHIFT) & CCI5xx_PMU_EVENT_SOURCE_MASK)
424 #define CCI5xx_PMU_EVENT_CODE(event) \
425 ((event >> CCI5xx_PMU_EVENT_CODE_SHIFT) & CCI5xx_PMU_EVENT_CODE_MASK)
427 #define CCI5xx_SLAVE_PORT_MIN_EV 0x00
428 #define CCI5xx_SLAVE_PORT_MAX_EV 0x1f
429 #define CCI5xx_MASTER_PORT_MIN_EV 0x00
430 #define CCI5xx_MASTER_PORT_MAX_EV 0x06
431 #define CCI5xx_GLOBAL_PORT_MIN_EV 0x00
432 #define CCI5xx_GLOBAL_PORT_MAX_EV 0x0f
435 #define CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(_name, _config) \
436 CCI_EXT_ATTR_ENTRY(_name, cci5xx_pmu_global_event_show, \
437 (unsigned long) _config)
439 static ssize_t cci5xx_pmu_global_event_show(struct device *dev,
440 struct device_attribute *attr, char *buf);
442 static struct attribute *cci5xx_pmu_format_attrs[] = {
443 CCI_FORMAT_EXT_ATTR_ENTRY(event, "config:0-4"),
444 CCI_FORMAT_EXT_ATTR_ENTRY(source, "config:5-8"),
448 static struct attribute *cci5xx_pmu_event_attrs[] = {
450 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_arvalid, 0x0),
451 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_dev, 0x1),
452 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_nonshareable, 0x2),
453 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_shareable_non_alloc, 0x3),
454 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_shareable_alloc, 0x4),
455 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_invalidate, 0x5),
456 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_cache_maint, 0x6),
457 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg, 0x7),
458 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_rval, 0x8),
459 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_rlast_snoop, 0x9),
460 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_awalid, 0xA),
461 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_dev, 0xB),
462 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_non_shareable, 0xC),
463 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_share_wb, 0xD),
464 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_share_wlu, 0xE),
465 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_share_wunique, 0xF),
466 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_evict, 0x10),
467 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_wrevict, 0x11),
468 CCI_EVENT_EXT_ATTR_ENTRY(si_w_data_beat, 0x12),
469 CCI_EVENT_EXT_ATTR_ENTRY(si_srq_acvalid, 0x13),
470 CCI_EVENT_EXT_ATTR_ENTRY(si_srq_read, 0x14),
471 CCI_EVENT_EXT_ATTR_ENTRY(si_srq_clean, 0x15),
472 CCI_EVENT_EXT_ATTR_ENTRY(si_srq_data_transfer_low, 0x16),
473 CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_stall_arvalid, 0x17),
474 CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_stall, 0x18),
475 CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_stall, 0x19),
476 CCI_EVENT_EXT_ATTR_ENTRY(si_w_data_stall, 0x1A),
477 CCI_EVENT_EXT_ATTR_ENTRY(si_w_resp_stall, 0x1B),
478 CCI_EVENT_EXT_ATTR_ENTRY(si_srq_stall, 0x1C),
479 CCI_EVENT_EXT_ATTR_ENTRY(si_s_data_stall, 0x1D),
480 CCI_EVENT_EXT_ATTR_ENTRY(si_rq_stall_ot_limit, 0x1E),
481 CCI_EVENT_EXT_ATTR_ENTRY(si_r_stall_arbit, 0x1F),
484 CCI_EVENT_EXT_ATTR_ENTRY(mi_r_data_beat_any, 0x0),
485 CCI_EVENT_EXT_ATTR_ENTRY(mi_w_data_beat_any, 0x1),
486 CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall, 0x2),
487 CCI_EVENT_EXT_ATTR_ENTRY(mi_r_data_stall, 0x3),
488 CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall, 0x4),
489 CCI_EVENT_EXT_ATTR_ENTRY(mi_w_data_stall, 0x5),
490 CCI_EVENT_EXT_ATTR_ENTRY(mi_w_resp_stall, 0x6),
493 CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_filter_bank_0_1, 0x0),
494 CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_filter_bank_2_3, 0x1),
495 CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_filter_bank_4_5, 0x2),
496 CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_filter_bank_6_7, 0x3),
497 CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_miss_filter_bank_0_1, 0x4),
498 CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_miss_filter_bank_2_3, 0x5),
499 CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_miss_filter_bank_4_5, 0x6),
500 CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_miss_filter_bank_6_7, 0x7),
501 CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_back_invalidation, 0x8),
502 CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_stall_alloc_busy, 0x9),
503 CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_stall_tt_full, 0xA),
504 CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_wrq, 0xB),
505 CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_cd_hs, 0xC),
506 CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_rq_stall_addr_hazard, 0xD),
507 CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_rq_stall_tt_full, 0xE),
508 CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_rq_tzmp1_prot, 0xF),
512 static ssize_t cci5xx_pmu_global_event_show(struct device *dev,
513 struct device_attribute *attr, char *buf)
515 struct dev_ext_attribute *eattr = container_of(attr,
516 struct dev_ext_attribute, attr);
517 /* Global events have single fixed source code */
518 return snprintf(buf, PAGE_SIZE, "event=0x%lx,source=0x%x\n",
519 (unsigned long)eattr->var, CCI5xx_PORT_GLOBAL);
523 * CCI500 provides 8 independent event counters that can count
524 * any of the events available.
525 * CCI500 PMU event source ids
526 * 0x0-0x6 - Slave interfaces
527 * 0x8-0xD - Master interfaces
528 * 0xf - Global Events
531 static int cci500_validate_hw_event(struct cci_pmu *cci_pmu,
532 unsigned long hw_event)
534 u32 ev_source = CCI5xx_PMU_EVENT_SOURCE(hw_event);
535 u32 ev_code = CCI5xx_PMU_EVENT_CODE(hw_event);
538 if (hw_event & ~CCI5xx_PMU_EVENT_MASK)
549 if_type = CCI_IF_SLAVE;
557 if_type = CCI_IF_MASTER;
559 case CCI5xx_PORT_GLOBAL:
560 if_type = CCI_IF_GLOBAL;
566 if (ev_code >= cci_pmu->model->event_ranges[if_type].min &&
567 ev_code <= cci_pmu->model->event_ranges[if_type].max)
574 * CCI550 provides 8 independent event counters that can count
575 * any of the events available.
576 * CCI550 PMU event source ids
577 * 0x0-0x6 - Slave interfaces
578 * 0x8-0xe - Master interfaces
579 * 0xf - Global Events
582 static int cci550_validate_hw_event(struct cci_pmu *cci_pmu,
583 unsigned long hw_event)
585 u32 ev_source = CCI5xx_PMU_EVENT_SOURCE(hw_event);
586 u32 ev_code = CCI5xx_PMU_EVENT_CODE(hw_event);
589 if (hw_event & ~CCI5xx_PMU_EVENT_MASK)
600 if_type = CCI_IF_SLAVE;
609 if_type = CCI_IF_MASTER;
611 case CCI5xx_PORT_GLOBAL:
612 if_type = CCI_IF_GLOBAL;
618 if (ev_code >= cci_pmu->model->event_ranges[if_type].min &&
619 ev_code <= cci_pmu->model->event_ranges[if_type].max)
625 #endif /* CONFIG_ARM_CCI5xx_PMU */
628 * Program the CCI PMU counters which have PERF_HES_ARCH set
629 * with the event period and mark them ready before we enable
632 static void cci_pmu_sync_counters(struct cci_pmu *cci_pmu)
635 struct cci_pmu_hw_events *cci_hw = &cci_pmu->hw_events;
637 DECLARE_BITMAP(mask, cci_pmu->num_cntrs);
639 bitmap_zero(mask, cci_pmu->num_cntrs);
640 for_each_set_bit(i, cci_pmu->hw_events.used_mask, cci_pmu->num_cntrs) {
641 struct perf_event *event = cci_hw->events[i];
646 /* Leave the events which are not counting */
647 if (event->hw.state & PERF_HES_STOPPED)
649 if (event->hw.state & PERF_HES_ARCH) {
651 event->hw.state &= ~PERF_HES_ARCH;
655 pmu_write_counters(cci_pmu, mask);
658 /* Should be called with cci_pmu->hw_events->pmu_lock held */
659 static void __cci_pmu_enable_nosync(struct cci_pmu *cci_pmu)
663 /* Enable all the PMU counters. */
664 val = readl_relaxed(cci_pmu->ctrl_base + CCI_PMCR) | CCI_PMCR_CEN;
665 writel(val, cci_pmu->ctrl_base + CCI_PMCR);
668 /* Should be called with cci_pmu->hw_events->pmu_lock held */
669 static void __cci_pmu_enable_sync(struct cci_pmu *cci_pmu)
671 cci_pmu_sync_counters(cci_pmu);
672 __cci_pmu_enable_nosync(cci_pmu);
675 /* Should be called with cci_pmu->hw_events->pmu_lock held */
676 static void __cci_pmu_disable(struct cci_pmu *cci_pmu)
680 /* Disable all the PMU counters. */
681 val = readl_relaxed(cci_pmu->ctrl_base + CCI_PMCR) & ~CCI_PMCR_CEN;
682 writel(val, cci_pmu->ctrl_base + CCI_PMCR);
685 static ssize_t cci_pmu_format_show(struct device *dev,
686 struct device_attribute *attr, char *buf)
688 struct dev_ext_attribute *eattr = container_of(attr,
689 struct dev_ext_attribute, attr);
690 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)eattr->var);
693 static ssize_t cci_pmu_event_show(struct device *dev,
694 struct device_attribute *attr, char *buf)
696 struct dev_ext_attribute *eattr = container_of(attr,
697 struct dev_ext_attribute, attr);
698 /* source parameter is mandatory for normal PMU events */
699 return snprintf(buf, PAGE_SIZE, "source=?,event=0x%lx\n",
700 (unsigned long)eattr->var);
703 static int pmu_is_valid_counter(struct cci_pmu *cci_pmu, int idx)
705 return 0 <= idx && idx <= CCI_PMU_CNTR_LAST(cci_pmu);
708 static u32 pmu_read_register(struct cci_pmu *cci_pmu, int idx, unsigned int offset)
710 return readl_relaxed(cci_pmu->base +
711 CCI_PMU_CNTR_BASE(cci_pmu->model, idx) + offset);
714 static void pmu_write_register(struct cci_pmu *cci_pmu, u32 value,
715 int idx, unsigned int offset)
717 writel_relaxed(value, cci_pmu->base +
718 CCI_PMU_CNTR_BASE(cci_pmu->model, idx) + offset);
721 static void pmu_disable_counter(struct cci_pmu *cci_pmu, int idx)
723 pmu_write_register(cci_pmu, 0, idx, CCI_PMU_CNTR_CTRL);
726 static void pmu_enable_counter(struct cci_pmu *cci_pmu, int idx)
728 pmu_write_register(cci_pmu, 1, idx, CCI_PMU_CNTR_CTRL);
731 static bool __maybe_unused
732 pmu_counter_is_enabled(struct cci_pmu *cci_pmu, int idx)
734 return (pmu_read_register(cci_pmu, idx, CCI_PMU_CNTR_CTRL) & 0x1) != 0;
737 static void pmu_set_event(struct cci_pmu *cci_pmu, int idx, unsigned long event)
739 pmu_write_register(cci_pmu, event, idx, CCI_PMU_EVT_SEL);
743 * For all counters on the CCI-PMU, disable any 'enabled' counters,
744 * saving the changed counters in the mask, so that we can restore
745 * it later using pmu_restore_counters. The mask is private to the
746 * caller. We cannot rely on the used_mask maintained by the CCI_PMU
747 * as it only tells us if the counter is assigned to perf_event or not.
748 * The state of the perf_event cannot be locked by the PMU layer, hence
749 * we check the individual counter status (which can be locked by
750 * cci_pm->hw_events->pmu_lock).
752 * @mask should be initialised to empty by the caller.
754 static void __maybe_unused
755 pmu_save_counters(struct cci_pmu *cci_pmu, unsigned long *mask)
759 for (i = 0; i < cci_pmu->num_cntrs; i++) {
760 if (pmu_counter_is_enabled(cci_pmu, i)) {
762 pmu_disable_counter(cci_pmu, i);
768 * Restore the status of the counters. Reversal of the pmu_save_counters().
769 * For each counter set in the mask, enable the counter back.
771 static void __maybe_unused
772 pmu_restore_counters(struct cci_pmu *cci_pmu, unsigned long *mask)
776 for_each_set_bit(i, mask, cci_pmu->num_cntrs)
777 pmu_enable_counter(cci_pmu, i);
781 * Returns the number of programmable counters actually implemented
784 static u32 pmu_get_max_counters(struct cci_pmu *cci_pmu)
786 return (readl_relaxed(cci_pmu->ctrl_base + CCI_PMCR) &
787 CCI_PMCR_NCNT_MASK) >> CCI_PMCR_NCNT_SHIFT;
790 static int pmu_get_event_idx(struct cci_pmu_hw_events *hw, struct perf_event *event)
792 struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
793 unsigned long cci_event = event->hw.config_base;
796 if (cci_pmu->model->get_event_idx)
797 return cci_pmu->model->get_event_idx(cci_pmu, hw, cci_event);
799 /* Generic code to find an unused idx from the mask */
800 for(idx = 0; idx <= CCI_PMU_CNTR_LAST(cci_pmu); idx++)
801 if (!test_and_set_bit(idx, hw->used_mask))
804 /* No counters available */
808 static int pmu_map_event(struct perf_event *event)
810 struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
812 if (event->attr.type < PERF_TYPE_MAX ||
813 !cci_pmu->model->validate_hw_event)
816 return cci_pmu->model->validate_hw_event(cci_pmu, event->attr.config);
819 static int pmu_request_irq(struct cci_pmu *cci_pmu, irq_handler_t handler)
822 struct platform_device *pmu_device = cci_pmu->plat_device;
824 if (unlikely(!pmu_device))
827 if (cci_pmu->nr_irqs < 1) {
828 dev_err(&pmu_device->dev, "no irqs for CCI PMUs defined\n");
833 * Register all available CCI PMU interrupts. In the interrupt handler
834 * we iterate over the counters checking for interrupt source (the
835 * overflowing counter) and clear it.
837 * This should allow handling of non-unique interrupt for the counters.
839 for (i = 0; i < cci_pmu->nr_irqs; i++) {
840 int err = request_irq(cci_pmu->irqs[i], handler, IRQF_SHARED,
841 "arm-cci-pmu", cci_pmu);
843 dev_err(&pmu_device->dev, "unable to request IRQ%d for ARM CCI PMU counters\n",
848 set_bit(i, &cci_pmu->active_irqs);
854 static void pmu_free_irq(struct cci_pmu *cci_pmu)
858 for (i = 0; i < cci_pmu->nr_irqs; i++) {
859 if (!test_and_clear_bit(i, &cci_pmu->active_irqs))
862 free_irq(cci_pmu->irqs[i], cci_pmu);
866 static u32 pmu_read_counter(struct perf_event *event)
868 struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
869 struct hw_perf_event *hw_counter = &event->hw;
870 int idx = hw_counter->idx;
873 if (unlikely(!pmu_is_valid_counter(cci_pmu, idx))) {
874 dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx);
877 value = pmu_read_register(cci_pmu, idx, CCI_PMU_CNTR);
882 static void pmu_write_counter(struct cci_pmu *cci_pmu, u32 value, int idx)
884 pmu_write_register(cci_pmu, value, idx, CCI_PMU_CNTR);
887 static void __pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask)
890 struct cci_pmu_hw_events *cci_hw = &cci_pmu->hw_events;
892 for_each_set_bit(i, mask, cci_pmu->num_cntrs) {
893 struct perf_event *event = cci_hw->events[i];
897 pmu_write_counter(cci_pmu, local64_read(&event->hw.prev_count), i);
901 static void pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask)
903 if (cci_pmu->model->write_counters)
904 cci_pmu->model->write_counters(cci_pmu, mask);
906 __pmu_write_counters(cci_pmu, mask);
909 #ifdef CONFIG_ARM_CCI5xx_PMU
912 * CCI-500/CCI-550 has advanced power saving policies, which could gate the
913 * clocks to the PMU counters, which makes the writes to them ineffective.
914 * The only way to write to those counters is when the global counters
915 * are enabled and the particular counter is enabled.
917 * So we do the following :
919 * 1) Disable all the PMU counters, saving their current state
920 * 2) Enable the global PMU profiling, now that all counters are
923 * For each counter to be programmed, repeat steps 3-7:
925 * 3) Write an invalid event code to the event control register for the
926 counter, so that the counters are not modified.
927 * 4) Enable the counter control for the counter.
928 * 5) Set the counter value
929 * 6) Disable the counter
930 * 7) Restore the event in the target counter
932 * 8) Disable the global PMU.
933 * 9) Restore the status of the rest of the counters.
935 * We choose an event which for CCI-5xx is guaranteed not to count.
936 * We use the highest possible event code (0x1f) for the master interface 0.
938 #define CCI5xx_INVALID_EVENT ((CCI5xx_PORT_M0 << CCI5xx_PMU_EVENT_SOURCE_SHIFT) | \
939 (CCI5xx_PMU_EVENT_CODE_MASK << CCI5xx_PMU_EVENT_CODE_SHIFT))
940 static void cci5xx_pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask)
943 DECLARE_BITMAP(saved_mask, cci_pmu->num_cntrs);
945 bitmap_zero(saved_mask, cci_pmu->num_cntrs);
946 pmu_save_counters(cci_pmu, saved_mask);
949 * Now that all the counters are disabled, we can safely turn the PMU on,
950 * without syncing the status of the counters
952 __cci_pmu_enable_nosync(cci_pmu);
954 for_each_set_bit(i, mask, cci_pmu->num_cntrs) {
955 struct perf_event *event = cci_pmu->hw_events.events[i];
960 pmu_set_event(cci_pmu, i, CCI5xx_INVALID_EVENT);
961 pmu_enable_counter(cci_pmu, i);
962 pmu_write_counter(cci_pmu, local64_read(&event->hw.prev_count), i);
963 pmu_disable_counter(cci_pmu, i);
964 pmu_set_event(cci_pmu, i, event->hw.config_base);
967 __cci_pmu_disable(cci_pmu);
969 pmu_restore_counters(cci_pmu, saved_mask);
972 #endif /* CONFIG_ARM_CCI5xx_PMU */
974 static u64 pmu_event_update(struct perf_event *event)
976 struct hw_perf_event *hwc = &event->hw;
977 u64 delta, prev_raw_count, new_raw_count;
980 prev_raw_count = local64_read(&hwc->prev_count);
981 new_raw_count = pmu_read_counter(event);
982 } while (local64_cmpxchg(&hwc->prev_count, prev_raw_count,
983 new_raw_count) != prev_raw_count);
985 delta = (new_raw_count - prev_raw_count) & CCI_PMU_CNTR_MASK;
987 local64_add(delta, &event->count);
989 return new_raw_count;
992 static void pmu_read(struct perf_event *event)
994 pmu_event_update(event);
997 static void pmu_event_set_period(struct perf_event *event)
999 struct hw_perf_event *hwc = &event->hw;
1001 * The CCI PMU counters have a period of 2^32. To account for the
1002 * possiblity of extreme interrupt latency we program for a period of
1003 * half that. Hopefully we can handle the interrupt before another 2^31
1004 * events occur and the counter overtakes its previous value.
1006 u64 val = 1ULL << 31;
1007 local64_set(&hwc->prev_count, val);
1010 * CCI PMU uses PERF_HES_ARCH to keep track of the counters, whose
1011 * values needs to be sync-ed with the s/w state before the PMU is
1013 * Mark this counter for sync.
1015 hwc->state |= PERF_HES_ARCH;
1018 static irqreturn_t pmu_handle_irq(int irq_num, void *dev)
1020 unsigned long flags;
1021 struct cci_pmu *cci_pmu = dev;
1022 struct cci_pmu_hw_events *events = &cci_pmu->hw_events;
1023 int idx, handled = IRQ_NONE;
1025 raw_spin_lock_irqsave(&events->pmu_lock, flags);
1027 /* Disable the PMU while we walk through the counters */
1028 __cci_pmu_disable(cci_pmu);
1030 * Iterate over counters and update the corresponding perf events.
1031 * This should work regardless of whether we have per-counter overflow
1032 * interrupt or a combined overflow interrupt.
1034 for (idx = 0; idx <= CCI_PMU_CNTR_LAST(cci_pmu); idx++) {
1035 struct perf_event *event = events->events[idx];
1040 /* Did this counter overflow? */
1041 if (!(pmu_read_register(cci_pmu, idx, CCI_PMU_OVRFLW) &
1042 CCI_PMU_OVRFLW_FLAG))
1045 pmu_write_register(cci_pmu, CCI_PMU_OVRFLW_FLAG, idx,
1048 pmu_event_update(event);
1049 pmu_event_set_period(event);
1050 handled = IRQ_HANDLED;
1053 /* Enable the PMU and sync possibly overflowed counters */
1054 __cci_pmu_enable_sync(cci_pmu);
1055 raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
1057 return IRQ_RETVAL(handled);
1060 static int cci_pmu_get_hw(struct cci_pmu *cci_pmu)
1062 int ret = pmu_request_irq(cci_pmu, pmu_handle_irq);
1064 pmu_free_irq(cci_pmu);
1070 static void cci_pmu_put_hw(struct cci_pmu *cci_pmu)
1072 pmu_free_irq(cci_pmu);
1075 static void hw_perf_event_destroy(struct perf_event *event)
1077 struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
1078 atomic_t *active_events = &cci_pmu->active_events;
1079 struct mutex *reserve_mutex = &cci_pmu->reserve_mutex;
1081 if (atomic_dec_and_mutex_lock(active_events, reserve_mutex)) {
1082 cci_pmu_put_hw(cci_pmu);
1083 mutex_unlock(reserve_mutex);
1087 static void cci_pmu_enable(struct pmu *pmu)
1089 struct cci_pmu *cci_pmu = to_cci_pmu(pmu);
1090 struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
1091 int enabled = bitmap_weight(hw_events->used_mask, cci_pmu->num_cntrs);
1092 unsigned long flags;
1097 raw_spin_lock_irqsave(&hw_events->pmu_lock, flags);
1098 __cci_pmu_enable_sync(cci_pmu);
1099 raw_spin_unlock_irqrestore(&hw_events->pmu_lock, flags);
1103 static void cci_pmu_disable(struct pmu *pmu)
1105 struct cci_pmu *cci_pmu = to_cci_pmu(pmu);
1106 struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
1107 unsigned long flags;
1109 raw_spin_lock_irqsave(&hw_events->pmu_lock, flags);
1110 __cci_pmu_disable(cci_pmu);
1111 raw_spin_unlock_irqrestore(&hw_events->pmu_lock, flags);
1115 * Check if the idx represents a non-programmable counter.
1116 * All the fixed event counters are mapped before the programmable
1119 static bool pmu_fixed_hw_idx(struct cci_pmu *cci_pmu, int idx)
1121 return (idx >= 0) && (idx < cci_pmu->model->fixed_hw_cntrs);
1124 static void cci_pmu_start(struct perf_event *event, int pmu_flags)
1126 struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
1127 struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
1128 struct hw_perf_event *hwc = &event->hw;
1130 unsigned long flags;
1133 * To handle interrupt latency, we always reprogram the period
1134 * regardlesss of PERF_EF_RELOAD.
1136 if (pmu_flags & PERF_EF_RELOAD)
1137 WARN_ON_ONCE(!(hwc->state & PERF_HES_UPTODATE));
1141 if (unlikely(!pmu_is_valid_counter(cci_pmu, idx))) {
1142 dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx);
1146 raw_spin_lock_irqsave(&hw_events->pmu_lock, flags);
1148 /* Configure the counter unless you are counting a fixed event */
1149 if (!pmu_fixed_hw_idx(cci_pmu, idx))
1150 pmu_set_event(cci_pmu, idx, hwc->config_base);
1152 pmu_event_set_period(event);
1153 pmu_enable_counter(cci_pmu, idx);
1155 raw_spin_unlock_irqrestore(&hw_events->pmu_lock, flags);
1158 static void cci_pmu_stop(struct perf_event *event, int pmu_flags)
1160 struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
1161 struct hw_perf_event *hwc = &event->hw;
1164 if (hwc->state & PERF_HES_STOPPED)
1167 if (unlikely(!pmu_is_valid_counter(cci_pmu, idx))) {
1168 dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx);
1173 * We always reprogram the counter, so ignore PERF_EF_UPDATE. See
1176 pmu_disable_counter(cci_pmu, idx);
1177 pmu_event_update(event);
1178 hwc->state |= PERF_HES_STOPPED | PERF_HES_UPTODATE;
1181 static int cci_pmu_add(struct perf_event *event, int flags)
1183 struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
1184 struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
1185 struct hw_perf_event *hwc = &event->hw;
1189 perf_pmu_disable(event->pmu);
1191 /* If we don't have a space for the counter then finish early. */
1192 idx = pmu_get_event_idx(hw_events, event);
1198 event->hw.idx = idx;
1199 hw_events->events[idx] = event;
1201 hwc->state = PERF_HES_STOPPED | PERF_HES_UPTODATE;
1202 if (flags & PERF_EF_START)
1203 cci_pmu_start(event, PERF_EF_RELOAD);
1205 /* Propagate our changes to the userspace mapping. */
1206 perf_event_update_userpage(event);
1209 perf_pmu_enable(event->pmu);
1213 static void cci_pmu_del(struct perf_event *event, int flags)
1215 struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
1216 struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
1217 struct hw_perf_event *hwc = &event->hw;
1220 cci_pmu_stop(event, PERF_EF_UPDATE);
1221 hw_events->events[idx] = NULL;
1222 clear_bit(idx, hw_events->used_mask);
1224 perf_event_update_userpage(event);
1227 static int validate_event(struct pmu *cci_pmu,
1228 struct cci_pmu_hw_events *hw_events,
1229 struct perf_event *event)
1231 if (is_software_event(event))
1235 * Reject groups spanning multiple HW PMUs (e.g. CPU + CCI). The
1236 * core perf code won't check that the pmu->ctx == leader->ctx
1237 * until after pmu->event_init(event).
1239 if (event->pmu != cci_pmu)
1242 if (event->state < PERF_EVENT_STATE_OFF)
1245 if (event->state == PERF_EVENT_STATE_OFF && !event->attr.enable_on_exec)
1248 return pmu_get_event_idx(hw_events, event) >= 0;
1251 static int validate_group(struct perf_event *event)
1253 struct perf_event *sibling, *leader = event->group_leader;
1254 struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
1255 unsigned long mask[BITS_TO_LONGS(cci_pmu->num_cntrs)];
1256 struct cci_pmu_hw_events fake_pmu = {
1258 * Initialise the fake PMU. We only need to populate the
1259 * used_mask for the purposes of validation.
1263 memset(mask, 0, BITS_TO_LONGS(cci_pmu->num_cntrs) * sizeof(unsigned long));
1265 if (!validate_event(event->pmu, &fake_pmu, leader))
1268 for_each_sibling_event(sibling, leader) {
1269 if (!validate_event(event->pmu, &fake_pmu, sibling))
1273 if (!validate_event(event->pmu, &fake_pmu, event))
1279 static int __hw_perf_event_init(struct perf_event *event)
1281 struct hw_perf_event *hwc = &event->hw;
1284 mapping = pmu_map_event(event);
1287 pr_debug("event %x:%llx not supported\n", event->attr.type,
1288 event->attr.config);
1293 * We don't assign an index until we actually place the event onto
1294 * hardware. Use -1 to signify that we haven't decided where to put it
1298 hwc->config_base = 0;
1300 hwc->event_base = 0;
1303 * Store the event encoding into the config_base field.
1305 hwc->config_base |= (unsigned long)mapping;
1308 * Limit the sample_period to half of the counter width. That way, the
1309 * new counter value is far less likely to overtake the previous one
1310 * unless you have some serious IRQ latency issues.
1312 hwc->sample_period = CCI_PMU_CNTR_MASK >> 1;
1313 hwc->last_period = hwc->sample_period;
1314 local64_set(&hwc->period_left, hwc->sample_period);
1316 if (event->group_leader != event) {
1317 if (validate_group(event) != 0)
1324 static int cci_pmu_event_init(struct perf_event *event)
1326 struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
1327 atomic_t *active_events = &cci_pmu->active_events;
1330 if (event->attr.type != event->pmu->type)
1333 /* Shared by all CPUs, no meaningful state to sample */
1334 if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK)
1337 /* We have no filtering of any kind */
1338 if (event->attr.exclude_user ||
1339 event->attr.exclude_kernel ||
1340 event->attr.exclude_hv ||
1341 event->attr.exclude_idle ||
1342 event->attr.exclude_host ||
1343 event->attr.exclude_guest)
1347 * Following the example set by other "uncore" PMUs, we accept any CPU
1348 * and rewrite its affinity dynamically rather than having perf core
1349 * handle cpu == -1 and pid == -1 for this case.
1351 * The perf core will pin online CPUs for the duration of this call and
1352 * the event being installed into its context, so the PMU's CPU can't
1353 * change under our feet.
1357 event->cpu = cci_pmu->cpu;
1359 event->destroy = hw_perf_event_destroy;
1360 if (!atomic_inc_not_zero(active_events)) {
1361 mutex_lock(&cci_pmu->reserve_mutex);
1362 if (atomic_read(active_events) == 0)
1363 err = cci_pmu_get_hw(cci_pmu);
1365 atomic_inc(active_events);
1366 mutex_unlock(&cci_pmu->reserve_mutex);
1371 err = __hw_perf_event_init(event);
1373 hw_perf_event_destroy(event);
1378 static ssize_t pmu_cpumask_attr_show(struct device *dev,
1379 struct device_attribute *attr, char *buf)
1381 struct pmu *pmu = dev_get_drvdata(dev);
1382 struct cci_pmu *cci_pmu = to_cci_pmu(pmu);
1384 return cpumap_print_to_pagebuf(true, buf, cpumask_of(cci_pmu->cpu));
1387 static struct device_attribute pmu_cpumask_attr =
1388 __ATTR(cpumask, S_IRUGO, pmu_cpumask_attr_show, NULL);
1390 static struct attribute *pmu_attrs[] = {
1391 &pmu_cpumask_attr.attr,
1395 static struct attribute_group pmu_attr_group = {
1399 static struct attribute_group pmu_format_attr_group = {
1401 .attrs = NULL, /* Filled in cci_pmu_init_attrs */
1404 static struct attribute_group pmu_event_attr_group = {
1406 .attrs = NULL, /* Filled in cci_pmu_init_attrs */
1409 static const struct attribute_group *pmu_attr_groups[] = {
1411 &pmu_format_attr_group,
1412 &pmu_event_attr_group,
1416 static int cci_pmu_init(struct cci_pmu *cci_pmu, struct platform_device *pdev)
1418 const struct cci_pmu_model *model = cci_pmu->model;
1419 char *name = model->name;
1422 pmu_event_attr_group.attrs = model->event_attrs;
1423 pmu_format_attr_group.attrs = model->format_attrs;
1425 cci_pmu->pmu = (struct pmu) {
1426 .name = cci_pmu->model->name,
1427 .task_ctx_nr = perf_invalid_context,
1428 .pmu_enable = cci_pmu_enable,
1429 .pmu_disable = cci_pmu_disable,
1430 .event_init = cci_pmu_event_init,
1433 .start = cci_pmu_start,
1434 .stop = cci_pmu_stop,
1436 .attr_groups = pmu_attr_groups,
1439 cci_pmu->plat_device = pdev;
1440 num_cntrs = pmu_get_max_counters(cci_pmu);
1441 if (num_cntrs > cci_pmu->model->num_hw_cntrs) {
1442 dev_warn(&pdev->dev,
1443 "PMU implements more counters(%d) than supported by"
1444 " the model(%d), truncated.",
1445 num_cntrs, cci_pmu->model->num_hw_cntrs);
1446 num_cntrs = cci_pmu->model->num_hw_cntrs;
1448 cci_pmu->num_cntrs = num_cntrs + cci_pmu->model->fixed_hw_cntrs;
1450 return perf_pmu_register(&cci_pmu->pmu, name, -1);
1453 static int cci_pmu_offline_cpu(unsigned int cpu)
1457 if (!g_cci_pmu || cpu != g_cci_pmu->cpu)
1460 target = cpumask_any_but(cpu_online_mask, cpu);
1461 if (target >= nr_cpu_ids)
1464 perf_pmu_migrate_context(&g_cci_pmu->pmu, cpu, target);
1465 g_cci_pmu->cpu = target;
1469 static struct cci_pmu_model cci_pmu_models[] = {
1470 #ifdef CONFIG_ARM_CCI400_PMU
1473 .fixed_hw_cntrs = 1, /* Cycle counter */
1476 .format_attrs = cci400_pmu_format_attrs,
1477 .event_attrs = cci400_r0_pmu_event_attrs,
1480 CCI400_R0_SLAVE_PORT_MIN_EV,
1481 CCI400_R0_SLAVE_PORT_MAX_EV,
1484 CCI400_R0_MASTER_PORT_MIN_EV,
1485 CCI400_R0_MASTER_PORT_MAX_EV,
1488 .validate_hw_event = cci400_validate_hw_event,
1489 .get_event_idx = cci400_get_event_idx,
1492 .name = "CCI_400_r1",
1493 .fixed_hw_cntrs = 1, /* Cycle counter */
1496 .format_attrs = cci400_pmu_format_attrs,
1497 .event_attrs = cci400_r1_pmu_event_attrs,
1500 CCI400_R1_SLAVE_PORT_MIN_EV,
1501 CCI400_R1_SLAVE_PORT_MAX_EV,
1504 CCI400_R1_MASTER_PORT_MIN_EV,
1505 CCI400_R1_MASTER_PORT_MAX_EV,
1508 .validate_hw_event = cci400_validate_hw_event,
1509 .get_event_idx = cci400_get_event_idx,
1512 #ifdef CONFIG_ARM_CCI5xx_PMU
1515 .fixed_hw_cntrs = 0,
1517 .cntr_size = SZ_64K,
1518 .format_attrs = cci5xx_pmu_format_attrs,
1519 .event_attrs = cci5xx_pmu_event_attrs,
1522 CCI5xx_SLAVE_PORT_MIN_EV,
1523 CCI5xx_SLAVE_PORT_MAX_EV,
1526 CCI5xx_MASTER_PORT_MIN_EV,
1527 CCI5xx_MASTER_PORT_MAX_EV,
1530 CCI5xx_GLOBAL_PORT_MIN_EV,
1531 CCI5xx_GLOBAL_PORT_MAX_EV,
1534 .validate_hw_event = cci500_validate_hw_event,
1535 .write_counters = cci5xx_pmu_write_counters,
1539 .fixed_hw_cntrs = 0,
1541 .cntr_size = SZ_64K,
1542 .format_attrs = cci5xx_pmu_format_attrs,
1543 .event_attrs = cci5xx_pmu_event_attrs,
1546 CCI5xx_SLAVE_PORT_MIN_EV,
1547 CCI5xx_SLAVE_PORT_MAX_EV,
1550 CCI5xx_MASTER_PORT_MIN_EV,
1551 CCI5xx_MASTER_PORT_MAX_EV,
1554 CCI5xx_GLOBAL_PORT_MIN_EV,
1555 CCI5xx_GLOBAL_PORT_MAX_EV,
1558 .validate_hw_event = cci550_validate_hw_event,
1559 .write_counters = cci5xx_pmu_write_counters,
1564 static const struct of_device_id arm_cci_pmu_matches[] = {
1565 #ifdef CONFIG_ARM_CCI400_PMU
1567 .compatible = "arm,cci-400-pmu",
1571 .compatible = "arm,cci-400-pmu,r0",
1572 .data = &cci_pmu_models[CCI400_R0],
1575 .compatible = "arm,cci-400-pmu,r1",
1576 .data = &cci_pmu_models[CCI400_R1],
1579 #ifdef CONFIG_ARM_CCI5xx_PMU
1581 .compatible = "arm,cci-500-pmu,r0",
1582 .data = &cci_pmu_models[CCI500_R0],
1585 .compatible = "arm,cci-550-pmu,r0",
1586 .data = &cci_pmu_models[CCI550_R0],
1592 static bool is_duplicate_irq(int irq, int *irqs, int nr_irqs)
1596 for (i = 0; i < nr_irqs; i++)
1603 static struct cci_pmu *cci_pmu_alloc(struct device *dev)
1605 struct cci_pmu *cci_pmu;
1606 const struct cci_pmu_model *model;
1609 * All allocations are devm_* hence we don't have to free
1610 * them explicitly on an error, as it would end up in driver
1613 cci_pmu = devm_kzalloc(dev, sizeof(*cci_pmu), GFP_KERNEL);
1615 return ERR_PTR(-ENOMEM);
1617 cci_pmu->ctrl_base = *(void __iomem **)dev->platform_data;
1619 model = of_device_get_match_data(dev);
1622 "DEPRECATED compatible property, requires secure access to CCI registers");
1623 model = probe_cci_model(cci_pmu);
1626 dev_warn(dev, "CCI PMU version not supported\n");
1627 return ERR_PTR(-ENODEV);
1630 cci_pmu->model = model;
1631 cci_pmu->irqs = devm_kcalloc(dev, CCI_PMU_MAX_HW_CNTRS(model),
1632 sizeof(*cci_pmu->irqs), GFP_KERNEL);
1634 return ERR_PTR(-ENOMEM);
1635 cci_pmu->hw_events.events = devm_kcalloc(dev,
1636 CCI_PMU_MAX_HW_CNTRS(model),
1637 sizeof(*cci_pmu->hw_events.events),
1639 if (!cci_pmu->hw_events.events)
1640 return ERR_PTR(-ENOMEM);
1641 cci_pmu->hw_events.used_mask = devm_kcalloc(dev,
1642 BITS_TO_LONGS(CCI_PMU_MAX_HW_CNTRS(model)),
1643 sizeof(*cci_pmu->hw_events.used_mask),
1645 if (!cci_pmu->hw_events.used_mask)
1646 return ERR_PTR(-ENOMEM);
1651 static int cci_pmu_probe(struct platform_device *pdev)
1653 struct resource *res;
1654 struct cci_pmu *cci_pmu;
1657 cci_pmu = cci_pmu_alloc(&pdev->dev);
1658 if (IS_ERR(cci_pmu))
1659 return PTR_ERR(cci_pmu);
1661 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1662 cci_pmu->base = devm_ioremap_resource(&pdev->dev, res);
1663 if (IS_ERR(cci_pmu->base))
1667 * CCI PMU has one overflow interrupt per counter; but some may be tied
1668 * together to a common interrupt.
1670 cci_pmu->nr_irqs = 0;
1671 for (i = 0; i < CCI_PMU_MAX_HW_CNTRS(cci_pmu->model); i++) {
1672 irq = platform_get_irq(pdev, i);
1676 if (is_duplicate_irq(irq, cci_pmu->irqs, cci_pmu->nr_irqs))
1679 cci_pmu->irqs[cci_pmu->nr_irqs++] = irq;
1683 * Ensure that the device tree has as many interrupts as the number
1686 if (i < CCI_PMU_MAX_HW_CNTRS(cci_pmu->model)) {
1687 dev_warn(&pdev->dev, "In-correct number of interrupts: %d, should be %d\n",
1688 i, CCI_PMU_MAX_HW_CNTRS(cci_pmu->model));
1692 raw_spin_lock_init(&cci_pmu->hw_events.pmu_lock);
1693 mutex_init(&cci_pmu->reserve_mutex);
1694 atomic_set(&cci_pmu->active_events, 0);
1695 cci_pmu->cpu = get_cpu();
1697 ret = cci_pmu_init(cci_pmu, pdev);
1703 cpuhp_setup_state_nocalls(CPUHP_AP_PERF_ARM_CCI_ONLINE,
1704 "perf/arm/cci:online", NULL,
1705 cci_pmu_offline_cpu);
1707 g_cci_pmu = cci_pmu;
1708 pr_info("ARM %s PMU driver probed", cci_pmu->model->name);
1712 static struct platform_driver cci_pmu_driver = {
1714 .name = DRIVER_NAME,
1715 .of_match_table = arm_cci_pmu_matches,
1717 .probe = cci_pmu_probe,
1720 builtin_platform_driver(cci_pmu_driver);
1721 MODULE_LICENSE("GPL");
1722 MODULE_DESCRIPTION("ARM CCI PMU support");