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ed69bdd8 LP |
1 | /* |
2 | * CCI cache coherent interconnect driver | |
3 | * | |
4 | * Copyright (C) 2013 ARM Ltd. | |
5 | * Author: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
12 | * kind, whether express or implied; without even the implied warranty | |
13 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | */ | |
16 | ||
17 | #include <linux/arm-cci.h> | |
18 | #include <linux/io.h> | |
c6f85cb4 | 19 | #include <linux/interrupt.h> |
ed69bdd8 LP |
20 | #include <linux/module.h> |
21 | #include <linux/of_address.h> | |
b91c8f28 PA |
22 | #include <linux/of_irq.h> |
23 | #include <linux/of_platform.h> | |
c6f85cb4 | 24 | #include <linux/perf_event.h> |
b91c8f28 | 25 | #include <linux/platform_device.h> |
ed69bdd8 | 26 | #include <linux/slab.h> |
b91c8f28 | 27 | #include <linux/spinlock.h> |
ed69bdd8 LP |
28 | |
29 | #include <asm/cacheflush.h> | |
30 | #include <asm/smp_plat.h> | |
31 | ||
f6b9e83c SP |
32 | static void __iomem *cci_ctrl_base; |
33 | static unsigned long cci_ctrl_phys; | |
ed69bdd8 | 34 | |
ee8e5d5f | 35 | #ifdef CONFIG_ARM_CCI400_PORT_CTRL |
ed69bdd8 LP |
36 | struct cci_nb_ports { |
37 | unsigned int nb_ace; | |
38 | unsigned int nb_ace_lite; | |
39 | }; | |
40 | ||
f6b9e83c SP |
41 | static const struct cci_nb_ports cci400_ports = { |
42 | .nb_ace = 2, | |
43 | .nb_ace_lite = 3 | |
ed69bdd8 LP |
44 | }; |
45 | ||
ee8e5d5f SP |
46 | #define CCI400_PORTS_DATA (&cci400_ports) |
47 | #else | |
48 | #define CCI400_PORTS_DATA (NULL) | |
49 | #endif | |
50 | ||
f6b9e83c | 51 | static const struct of_device_id arm_cci_matches[] = { |
ee8e5d5f SP |
52 | #ifdef CONFIG_ARM_CCI400_COMMON |
53 | {.compatible = "arm,cci-400", .data = CCI400_PORTS_DATA }, | |
a95791ef SP |
54 | #endif |
55 | #ifdef CONFIG_ARM_CCI500_PMU | |
56 | { .compatible = "arm,cci-500", }, | |
ee8e5d5f | 57 | #endif |
f6b9e83c | 58 | {}, |
ed69bdd8 LP |
59 | }; |
60 | ||
f4d58938 | 61 | #ifdef CONFIG_ARM_CCI_PMU |
b91c8f28 | 62 | |
f4d58938 | 63 | #define DRIVER_NAME "ARM-CCI" |
f6b9e83c SP |
64 | #define DRIVER_NAME_PMU DRIVER_NAME " PMU" |
65 | ||
b91c8f28 PA |
66 | #define CCI_PMCR 0x0100 |
67 | #define CCI_PID2 0x0fe8 | |
68 | ||
69 | #define CCI_PMCR_CEN 0x00000001 | |
70 | #define CCI_PMCR_NCNT_MASK 0x0000f800 | |
71 | #define CCI_PMCR_NCNT_SHIFT 11 | |
72 | ||
73 | #define CCI_PID2_REV_MASK 0xf0 | |
74 | #define CCI_PID2_REV_SHIFT 4 | |
75 | ||
f6b9e83c SP |
76 | #define CCI_PMU_EVT_SEL 0x000 |
77 | #define CCI_PMU_CNTR 0x004 | |
78 | #define CCI_PMU_CNTR_CTRL 0x008 | |
79 | #define CCI_PMU_OVRFLW 0x00c | |
80 | ||
81 | #define CCI_PMU_OVRFLW_FLAG 1 | |
82 | ||
ab5b316d SP |
83 | #define CCI_PMU_CNTR_SIZE(model) ((model)->cntr_size) |
84 | #define CCI_PMU_CNTR_BASE(model, idx) ((idx) * CCI_PMU_CNTR_SIZE(model)) | |
85 | #define CCI_PMU_CNTR_MASK ((1ULL << 32) -1) | |
86 | #define CCI_PMU_CNTR_LAST(cci_pmu) (cci_pmu->num_cntrs - 1) | |
f6b9e83c | 87 | |
ab5b316d SP |
88 | #define CCI_PMU_MAX_HW_CNTRS(model) \ |
89 | ((model)->num_hw_cntrs + (model)->fixed_hw_cntrs) | |
f6b9e83c | 90 | |
fc17c839 SP |
91 | /* Types of interfaces that can generate events */ |
92 | enum { | |
93 | CCI_IF_SLAVE, | |
94 | CCI_IF_MASTER, | |
a95791ef SP |
95 | #ifdef CONFIG_ARM_CCI500_PMU |
96 | CCI_IF_GLOBAL, | |
97 | #endif | |
fc17c839 SP |
98 | CCI_IF_MAX, |
99 | }; | |
100 | ||
101 | struct event_range { | |
102 | u32 min; | |
103 | u32 max; | |
104 | }; | |
105 | ||
f6b9e83c | 106 | struct cci_pmu_hw_events { |
ab5b316d SP |
107 | struct perf_event **events; |
108 | unsigned long *used_mask; | |
f6b9e83c SP |
109 | raw_spinlock_t pmu_lock; |
110 | }; | |
111 | ||
31216290 | 112 | struct cci_pmu; |
ab5b316d SP |
113 | /* |
114 | * struct cci_pmu_model: | |
115 | * @fixed_hw_cntrs - Number of fixed event counters | |
116 | * @num_hw_cntrs - Maximum number of programmable event counters | |
117 | * @cntr_size - Size of an event counter mapping | |
118 | */ | |
fc17c839 SP |
119 | struct cci_pmu_model { |
120 | char *name; | |
ab5b316d SP |
121 | u32 fixed_hw_cntrs; |
122 | u32 num_hw_cntrs; | |
123 | u32 cntr_size; | |
e14cfad3 SP |
124 | u64 nformat_attrs; |
125 | u64 nevent_attrs; | |
126 | struct dev_ext_attribute *format_attrs; | |
127 | struct dev_ext_attribute *event_attrs; | |
fc17c839 | 128 | struct event_range event_ranges[CCI_IF_MAX]; |
31216290 SP |
129 | int (*validate_hw_event)(struct cci_pmu *, unsigned long); |
130 | int (*get_event_idx)(struct cci_pmu *, struct cci_pmu_hw_events *, unsigned long); | |
fc17c839 SP |
131 | }; |
132 | ||
133 | static struct cci_pmu_model cci_pmu_models[]; | |
134 | ||
f6b9e83c SP |
135 | struct cci_pmu { |
136 | void __iomem *base; | |
137 | struct pmu pmu; | |
138 | int nr_irqs; | |
ab5b316d | 139 | int *irqs; |
f6b9e83c | 140 | unsigned long active_irqs; |
fc17c839 | 141 | const struct cci_pmu_model *model; |
f6b9e83c SP |
142 | struct cci_pmu_hw_events hw_events; |
143 | struct platform_device *plat_device; | |
ab5b316d | 144 | int num_cntrs; |
f6b9e83c SP |
145 | atomic_t active_events; |
146 | struct mutex reserve_mutex; | |
a1a076d7 | 147 | struct notifier_block cpu_nb; |
f6b9e83c SP |
148 | cpumask_t cpus; |
149 | }; | |
f6b9e83c SP |
150 | |
151 | #define to_cci_pmu(c) (container_of(c, struct cci_pmu, pmu)) | |
152 | ||
f4d58938 SP |
153 | enum cci_models { |
154 | #ifdef CONFIG_ARM_CCI400_PMU | |
155 | CCI400_R0, | |
156 | CCI400_R1, | |
a95791ef SP |
157 | #endif |
158 | #ifdef CONFIG_ARM_CCI500_PMU | |
159 | CCI500_R0, | |
f4d58938 SP |
160 | #endif |
161 | CCI_MODEL_MAX | |
162 | }; | |
163 | ||
e14cfad3 SP |
164 | static ssize_t cci_pmu_format_show(struct device *dev, |
165 | struct device_attribute *attr, char *buf); | |
166 | static ssize_t cci_pmu_event_show(struct device *dev, | |
167 | struct device_attribute *attr, char *buf); | |
168 | ||
169 | #define CCI_EXT_ATTR_ENTRY(_name, _func, _config) \ | |
170 | { __ATTR(_name, S_IRUGO, _func, NULL), (void *)_config } | |
171 | ||
172 | #define CCI_FORMAT_EXT_ATTR_ENTRY(_name, _config) \ | |
173 | CCI_EXT_ATTR_ENTRY(_name, cci_pmu_format_show, (char *)_config) | |
174 | #define CCI_EVENT_EXT_ATTR_ENTRY(_name, _config) \ | |
175 | CCI_EXT_ATTR_ENTRY(_name, cci_pmu_event_show, (unsigned long)_config) | |
176 | ||
f4d58938 SP |
177 | /* CCI400 PMU Specific definitions */ |
178 | ||
179 | #ifdef CONFIG_ARM_CCI400_PMU | |
180 | ||
b91c8f28 | 181 | /* Port ids */ |
f4d58938 SP |
182 | #define CCI400_PORT_S0 0 |
183 | #define CCI400_PORT_S1 1 | |
184 | #define CCI400_PORT_S2 2 | |
185 | #define CCI400_PORT_S3 3 | |
186 | #define CCI400_PORT_S4 4 | |
187 | #define CCI400_PORT_M0 5 | |
188 | #define CCI400_PORT_M1 6 | |
189 | #define CCI400_PORT_M2 7 | |
190 | ||
191 | #define CCI400_R1_PX 5 | |
b91c8f28 | 192 | |
b91c8f28 PA |
193 | /* |
194 | * Instead of an event id to monitor CCI cycles, a dedicated counter is | |
195 | * provided. Use 0xff to represent CCI cycles and hope that no future revisions | |
196 | * make use of this event in hardware. | |
197 | */ | |
198 | enum cci400_perf_events { | |
f4d58938 | 199 | CCI400_PMU_CYCLES = 0xff |
b91c8f28 PA |
200 | }; |
201 | ||
f4d58938 SP |
202 | #define CCI400_PMU_CYCLE_CNTR_IDX 0 |
203 | #define CCI400_PMU_CNTR0_IDX 1 | |
b91c8f28 PA |
204 | |
205 | /* | |
206 | * CCI PMU event id is an 8-bit value made of two parts - bits 7:5 for one of 8 | |
207 | * ports and bits 4:0 are event codes. There are different event codes | |
208 | * associated with each port type. | |
209 | * | |
210 | * Additionally, the range of events associated with the port types changed | |
211 | * between Rev0 and Rev1. | |
212 | * | |
213 | * The constants below define the range of valid codes for each port type for | |
214 | * the different revisions and are used to validate the event to be monitored. | |
215 | */ | |
216 | ||
f4d58938 SP |
217 | #define CCI400_PMU_EVENT_MASK 0xffUL |
218 | #define CCI400_PMU_EVENT_SOURCE_SHIFT 5 | |
219 | #define CCI400_PMU_EVENT_SOURCE_MASK 0x7 | |
220 | #define CCI400_PMU_EVENT_CODE_SHIFT 0 | |
221 | #define CCI400_PMU_EVENT_CODE_MASK 0x1f | |
222 | #define CCI400_PMU_EVENT_SOURCE(event) \ | |
223 | ((event >> CCI400_PMU_EVENT_SOURCE_SHIFT) & \ | |
224 | CCI400_PMU_EVENT_SOURCE_MASK) | |
225 | #define CCI400_PMU_EVENT_CODE(event) \ | |
226 | ((event >> CCI400_PMU_EVENT_CODE_SHIFT) & CCI400_PMU_EVENT_CODE_MASK) | |
227 | ||
228 | #define CCI400_R0_SLAVE_PORT_MIN_EV 0x00 | |
229 | #define CCI400_R0_SLAVE_PORT_MAX_EV 0x13 | |
230 | #define CCI400_R0_MASTER_PORT_MIN_EV 0x14 | |
231 | #define CCI400_R0_MASTER_PORT_MAX_EV 0x1a | |
232 | ||
233 | #define CCI400_R1_SLAVE_PORT_MIN_EV 0x00 | |
234 | #define CCI400_R1_SLAVE_PORT_MAX_EV 0x14 | |
235 | #define CCI400_R1_MASTER_PORT_MIN_EV 0x00 | |
236 | #define CCI400_R1_MASTER_PORT_MAX_EV 0x11 | |
b91c8f28 | 237 | |
e14cfad3 SP |
238 | #define CCI400_CYCLE_EVENT_EXT_ATTR_ENTRY(_name, _config) \ |
239 | CCI_EXT_ATTR_ENTRY(_name, cci400_pmu_cycle_event_show, \ | |
240 | (unsigned long)_config) | |
241 | ||
242 | static ssize_t cci400_pmu_cycle_event_show(struct device *dev, | |
243 | struct device_attribute *attr, char *buf); | |
244 | ||
245 | static struct dev_ext_attribute cci400_pmu_format_attrs[] = { | |
246 | CCI_FORMAT_EXT_ATTR_ENTRY(event, "config:0-4"), | |
247 | CCI_FORMAT_EXT_ATTR_ENTRY(source, "config:5-7"), | |
248 | }; | |
249 | ||
250 | static struct dev_ext_attribute cci400_r0_pmu_event_attrs[] = { | |
251 | /* Slave events */ | |
252 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_any, 0x0), | |
253 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_device, 0x01), | |
254 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_normal_or_nonshareable, 0x2), | |
255 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_inner_or_outershareable, 0x3), | |
256 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_cache_maintenance, 0x4), | |
257 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_mem_barrier, 0x5), | |
258 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_sync_barrier, 0x6), | |
259 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg, 0x7), | |
260 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg_sync, 0x8), | |
261 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_stall_tt_full, 0x9), | |
262 | CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_last_hs_snoop, 0xA), | |
263 | CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_stall_rvalids_h_rready_l, 0xB), | |
264 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_any, 0xC), | |
265 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_device, 0xD), | |
266 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_normal_or_nonshareable, 0xE), | |
267 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_inner_or_outershare_wback_wclean, 0xF), | |
268 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_write_unique, 0x10), | |
269 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_write_line_unique, 0x11), | |
270 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_evict, 0x12), | |
271 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_stall_tt_full, 0x13), | |
272 | /* Master events */ | |
273 | CCI_EVENT_EXT_ATTR_ENTRY(mi_retry_speculative_fetch, 0x14), | |
274 | CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_addr_hazard, 0x15), | |
275 | CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_id_hazard, 0x16), | |
276 | CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_tt_full, 0x17), | |
277 | CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_barrier_hazard, 0x18), | |
278 | CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_barrier_hazard, 0x19), | |
279 | CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_tt_full, 0x1A), | |
280 | /* Special event for cycles counter */ | |
281 | CCI400_CYCLE_EVENT_EXT_ATTR_ENTRY(cycles, 0xff), | |
282 | }; | |
283 | ||
284 | static struct dev_ext_attribute cci400_r1_pmu_event_attrs[] = { | |
285 | /* Slave events */ | |
286 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_any, 0x0), | |
287 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_device, 0x01), | |
288 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_normal_or_nonshareable, 0x2), | |
289 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_inner_or_outershareable, 0x3), | |
290 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_cache_maintenance, 0x4), | |
291 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_mem_barrier, 0x5), | |
292 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_sync_barrier, 0x6), | |
293 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg, 0x7), | |
294 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg_sync, 0x8), | |
295 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_stall_tt_full, 0x9), | |
296 | CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_last_hs_snoop, 0xA), | |
297 | CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_stall_rvalids_h_rready_l, 0xB), | |
298 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_any, 0xC), | |
299 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_device, 0xD), | |
300 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_normal_or_nonshareable, 0xE), | |
301 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_inner_or_outershare_wback_wclean, 0xF), | |
302 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_write_unique, 0x10), | |
303 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_write_line_unique, 0x11), | |
304 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_evict, 0x12), | |
305 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_stall_tt_full, 0x13), | |
306 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_stall_slave_id_hazard, 0x14), | |
307 | /* Master events */ | |
308 | CCI_EVENT_EXT_ATTR_ENTRY(mi_retry_speculative_fetch, 0x0), | |
309 | CCI_EVENT_EXT_ATTR_ENTRY(mi_stall_cycle_addr_hazard, 0x1), | |
310 | CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_master_id_hazard, 0x2), | |
311 | CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_hi_prio_rtq_full, 0x3), | |
312 | CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_barrier_hazard, 0x4), | |
313 | CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_barrier_hazard, 0x5), | |
314 | CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_wtq_full, 0x6), | |
315 | CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_low_prio_rtq_full, 0x7), | |
316 | CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_mid_prio_rtq_full, 0x8), | |
317 | CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_qvn_vn0, 0x9), | |
318 | CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_qvn_vn1, 0xA), | |
319 | CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_qvn_vn2, 0xB), | |
320 | CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_qvn_vn3, 0xC), | |
321 | CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_qvn_vn0, 0xD), | |
322 | CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_qvn_vn1, 0xE), | |
323 | CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_qvn_vn2, 0xF), | |
324 | CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_qvn_vn3, 0x10), | |
325 | CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_unique_or_line_unique_addr_hazard, 0x11), | |
326 | /* Special event for cycles counter */ | |
327 | CCI400_CYCLE_EVENT_EXT_ATTR_ENTRY(cycles, 0xff), | |
328 | }; | |
329 | ||
330 | static ssize_t cci400_pmu_cycle_event_show(struct device *dev, | |
331 | struct device_attribute *attr, char *buf) | |
332 | { | |
333 | struct dev_ext_attribute *eattr = container_of(attr, | |
334 | struct dev_ext_attribute, attr); | |
335 | return snprintf(buf, PAGE_SIZE, "config=0x%lx\n", (unsigned long)eattr->var); | |
336 | } | |
337 | ||
31216290 SP |
338 | static int cci400_get_event_idx(struct cci_pmu *cci_pmu, |
339 | struct cci_pmu_hw_events *hw, | |
340 | unsigned long cci_event) | |
341 | { | |
342 | int idx; | |
343 | ||
344 | /* cycles event idx is fixed */ | |
f4d58938 SP |
345 | if (cci_event == CCI400_PMU_CYCLES) { |
346 | if (test_and_set_bit(CCI400_PMU_CYCLE_CNTR_IDX, hw->used_mask)) | |
31216290 SP |
347 | return -EAGAIN; |
348 | ||
f4d58938 | 349 | return CCI400_PMU_CYCLE_CNTR_IDX; |
31216290 SP |
350 | } |
351 | ||
f4d58938 | 352 | for (idx = CCI400_PMU_CNTR0_IDX; idx <= CCI_PMU_CNTR_LAST(cci_pmu); ++idx) |
31216290 SP |
353 | if (!test_and_set_bit(idx, hw->used_mask)) |
354 | return idx; | |
355 | ||
356 | /* No counters available */ | |
357 | return -EAGAIN; | |
358 | } | |
359 | ||
360 | static int cci400_validate_hw_event(struct cci_pmu *cci_pmu, unsigned long hw_event) | |
b91c8f28 | 361 | { |
f4d58938 SP |
362 | u8 ev_source = CCI400_PMU_EVENT_SOURCE(hw_event); |
363 | u8 ev_code = CCI400_PMU_EVENT_CODE(hw_event); | |
fc17c839 | 364 | int if_type; |
b91c8f28 | 365 | |
f4d58938 | 366 | if (hw_event & ~CCI400_PMU_EVENT_MASK) |
874c5714 SP |
367 | return -ENOENT; |
368 | ||
f4d58938 | 369 | if (hw_event == CCI400_PMU_CYCLES) |
31216290 SP |
370 | return hw_event; |
371 | ||
b91c8f28 | 372 | switch (ev_source) { |
f4d58938 SP |
373 | case CCI400_PORT_S0: |
374 | case CCI400_PORT_S1: | |
375 | case CCI400_PORT_S2: | |
376 | case CCI400_PORT_S3: | |
377 | case CCI400_PORT_S4: | |
b91c8f28 | 378 | /* Slave Interface */ |
fc17c839 | 379 | if_type = CCI_IF_SLAVE; |
b91c8f28 | 380 | break; |
f4d58938 SP |
381 | case CCI400_PORT_M0: |
382 | case CCI400_PORT_M1: | |
383 | case CCI400_PORT_M2: | |
b91c8f28 | 384 | /* Master Interface */ |
fc17c839 | 385 | if_type = CCI_IF_MASTER; |
b91c8f28 | 386 | break; |
fc17c839 SP |
387 | default: |
388 | return -ENOENT; | |
b91c8f28 PA |
389 | } |
390 | ||
a1a076d7 SP |
391 | if (ev_code >= cci_pmu->model->event_ranges[if_type].min && |
392 | ev_code <= cci_pmu->model->event_ranges[if_type].max) | |
fc17c839 SP |
393 | return hw_event; |
394 | ||
b91c8f28 PA |
395 | return -ENOENT; |
396 | } | |
397 | ||
f4d58938 | 398 | static int probe_cci400_revision(void) |
f6b9e83c SP |
399 | { |
400 | int rev; | |
401 | rev = readl_relaxed(cci_ctrl_base + CCI_PID2) & CCI_PID2_REV_MASK; | |
402 | rev >>= CCI_PID2_REV_SHIFT; | |
403 | ||
f4d58938 SP |
404 | if (rev < CCI400_R1_PX) |
405 | return CCI400_R0; | |
f6b9e83c | 406 | else |
f4d58938 | 407 | return CCI400_R1; |
f6b9e83c SP |
408 | } |
409 | ||
fc17c839 | 410 | static const struct cci_pmu_model *probe_cci_model(struct platform_device *pdev) |
f6b9e83c | 411 | { |
772742a6 | 412 | if (platform_has_secure_cci_access()) |
f4d58938 SP |
413 | return &cci_pmu_models[probe_cci400_revision()]; |
414 | return NULL; | |
415 | } | |
416 | #else /* !CONFIG_ARM_CCI400_PMU */ | |
417 | static inline struct cci_pmu_model *probe_cci_model(struct platform_device *pdev) | |
418 | { | |
772742a6 | 419 | return NULL; |
f6b9e83c | 420 | } |
f4d58938 | 421 | #endif /* CONFIG_ARM_CCI400_PMU */ |
f6b9e83c | 422 | |
a95791ef SP |
423 | #ifdef CONFIG_ARM_CCI500_PMU |
424 | ||
425 | /* | |
426 | * CCI500 provides 8 independent event counters that can count | |
427 | * any of the events available. | |
428 | * | |
429 | * CCI500 PMU event id is an 9-bit value made of two parts. | |
430 | * bits [8:5] - Source for the event | |
431 | * 0x0-0x6 - Slave interfaces | |
432 | * 0x8-0xD - Master interfaces | |
433 | * 0xf - Global Events | |
434 | * 0x7,0xe - Reserved | |
435 | * | |
436 | * bits [4:0] - Event code (specific to type of interface) | |
437 | */ | |
438 | ||
439 | /* Port ids */ | |
440 | #define CCI500_PORT_S0 0x0 | |
441 | #define CCI500_PORT_S1 0x1 | |
442 | #define CCI500_PORT_S2 0x2 | |
443 | #define CCI500_PORT_S3 0x3 | |
444 | #define CCI500_PORT_S4 0x4 | |
445 | #define CCI500_PORT_S5 0x5 | |
446 | #define CCI500_PORT_S6 0x6 | |
447 | ||
448 | #define CCI500_PORT_M0 0x8 | |
449 | #define CCI500_PORT_M1 0x9 | |
450 | #define CCI500_PORT_M2 0xa | |
451 | #define CCI500_PORT_M3 0xb | |
452 | #define CCI500_PORT_M4 0xc | |
453 | #define CCI500_PORT_M5 0xd | |
454 | ||
455 | #define CCI500_PORT_GLOBAL 0xf | |
456 | ||
457 | #define CCI500_PMU_EVENT_MASK 0x1ffUL | |
458 | #define CCI500_PMU_EVENT_SOURCE_SHIFT 0x5 | |
459 | #define CCI500_PMU_EVENT_SOURCE_MASK 0xf | |
460 | #define CCI500_PMU_EVENT_CODE_SHIFT 0x0 | |
461 | #define CCI500_PMU_EVENT_CODE_MASK 0x1f | |
462 | ||
463 | #define CCI500_PMU_EVENT_SOURCE(event) \ | |
464 | ((event >> CCI500_PMU_EVENT_SOURCE_SHIFT) & CCI500_PMU_EVENT_SOURCE_MASK) | |
465 | #define CCI500_PMU_EVENT_CODE(event) \ | |
466 | ((event >> CCI500_PMU_EVENT_CODE_SHIFT) & CCI500_PMU_EVENT_CODE_MASK) | |
467 | ||
468 | #define CCI500_SLAVE_PORT_MIN_EV 0x00 | |
469 | #define CCI500_SLAVE_PORT_MAX_EV 0x1f | |
470 | #define CCI500_MASTER_PORT_MIN_EV 0x00 | |
471 | #define CCI500_MASTER_PORT_MAX_EV 0x06 | |
472 | #define CCI500_GLOBAL_PORT_MIN_EV 0x00 | |
473 | #define CCI500_GLOBAL_PORT_MAX_EV 0x0f | |
474 | ||
e14cfad3 SP |
475 | |
476 | #define CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(_name, _config) \ | |
477 | CCI_EXT_ATTR_ENTRY(_name, cci500_pmu_global_event_show, \ | |
478 | (unsigned long) _config) | |
479 | ||
480 | static ssize_t cci500_pmu_global_event_show(struct device *dev, | |
481 | struct device_attribute *attr, char *buf); | |
482 | ||
483 | static struct dev_ext_attribute cci500_pmu_format_attrs[] = { | |
484 | CCI_FORMAT_EXT_ATTR_ENTRY(event, "config:0-4"), | |
485 | CCI_FORMAT_EXT_ATTR_ENTRY(source, "config:5-8"), | |
486 | }; | |
487 | ||
488 | static struct dev_ext_attribute cci500_pmu_event_attrs[] = { | |
489 | /* Slave events */ | |
490 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_arvalid, 0x0), | |
491 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_dev, 0x1), | |
492 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_nonshareable, 0x2), | |
493 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_shareable_non_alloc, 0x3), | |
494 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_shareable_alloc, 0x4), | |
495 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_invalidate, 0x5), | |
496 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_cache_maint, 0x6), | |
497 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg, 0x7), | |
498 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_rval, 0x8), | |
499 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_rlast_snoop, 0x9), | |
500 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_awalid, 0xA), | |
501 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_dev, 0xB), | |
502 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_non_shareable, 0xC), | |
503 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_share_wb, 0xD), | |
504 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_share_wlu, 0xE), | |
505 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_share_wunique, 0xF), | |
506 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_evict, 0x10), | |
507 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_wrevict, 0x11), | |
508 | CCI_EVENT_EXT_ATTR_ENTRY(si_w_data_beat, 0x12), | |
509 | CCI_EVENT_EXT_ATTR_ENTRY(si_srq_acvalid, 0x13), | |
510 | CCI_EVENT_EXT_ATTR_ENTRY(si_srq_read, 0x14), | |
511 | CCI_EVENT_EXT_ATTR_ENTRY(si_srq_clean, 0x15), | |
512 | CCI_EVENT_EXT_ATTR_ENTRY(si_srq_data_transfer_low, 0x16), | |
513 | CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_stall_arvalid, 0x17), | |
514 | CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_stall, 0x18), | |
515 | CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_stall, 0x19), | |
516 | CCI_EVENT_EXT_ATTR_ENTRY(si_w_data_stall, 0x1A), | |
517 | CCI_EVENT_EXT_ATTR_ENTRY(si_w_resp_stall, 0x1B), | |
518 | CCI_EVENT_EXT_ATTR_ENTRY(si_srq_stall, 0x1C), | |
519 | CCI_EVENT_EXT_ATTR_ENTRY(si_s_data_stall, 0x1D), | |
520 | CCI_EVENT_EXT_ATTR_ENTRY(si_rq_stall_ot_limit, 0x1E), | |
521 | CCI_EVENT_EXT_ATTR_ENTRY(si_r_stall_arbit, 0x1F), | |
522 | ||
523 | /* Master events */ | |
524 | CCI_EVENT_EXT_ATTR_ENTRY(mi_r_data_beat_any, 0x0), | |
525 | CCI_EVENT_EXT_ATTR_ENTRY(mi_w_data_beat_any, 0x1), | |
526 | CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall, 0x2), | |
527 | CCI_EVENT_EXT_ATTR_ENTRY(mi_r_data_stall, 0x3), | |
528 | CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall, 0x4), | |
529 | CCI_EVENT_EXT_ATTR_ENTRY(mi_w_data_stall, 0x5), | |
530 | CCI_EVENT_EXT_ATTR_ENTRY(mi_w_resp_stall, 0x6), | |
531 | ||
532 | /* Global events */ | |
533 | CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_filter_bank_0_1, 0x0), | |
534 | CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_filter_bank_2_3, 0x1), | |
535 | CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_filter_bank_4_5, 0x2), | |
536 | CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_filter_bank_6_7, 0x3), | |
537 | CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_miss_filter_bank_0_1, 0x4), | |
538 | CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_miss_filter_bank_2_3, 0x5), | |
539 | CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_miss_filter_bank_4_5, 0x6), | |
540 | CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_miss_filter_bank_6_7, 0x7), | |
541 | CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_back_invalidation, 0x8), | |
542 | CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_stall_alloc_busy, 0x9), | |
543 | CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_stall_tt_full, 0xA), | |
544 | CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_wrq, 0xB), | |
545 | CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_cd_hs, 0xC), | |
546 | CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_rq_stall_addr_hazard, 0xD), | |
547 | CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snopp_rq_stall_tt_full, 0xE), | |
548 | CCI500_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_rq_tzmp1_prot, 0xF), | |
549 | }; | |
550 | ||
551 | static ssize_t cci500_pmu_global_event_show(struct device *dev, | |
552 | struct device_attribute *attr, char *buf) | |
553 | { | |
554 | struct dev_ext_attribute *eattr = container_of(attr, | |
555 | struct dev_ext_attribute, attr); | |
556 | /* Global events have single fixed source code */ | |
557 | return snprintf(buf, PAGE_SIZE, "event=0x%lx,source=0x%x\n", | |
558 | (unsigned long)eattr->var, CCI500_PORT_GLOBAL); | |
559 | } | |
560 | ||
a95791ef SP |
561 | static int cci500_validate_hw_event(struct cci_pmu *cci_pmu, |
562 | unsigned long hw_event) | |
563 | { | |
564 | u32 ev_source = CCI500_PMU_EVENT_SOURCE(hw_event); | |
565 | u32 ev_code = CCI500_PMU_EVENT_CODE(hw_event); | |
566 | int if_type; | |
567 | ||
568 | if (hw_event & ~CCI500_PMU_EVENT_MASK) | |
569 | return -ENOENT; | |
570 | ||
571 | switch (ev_source) { | |
572 | case CCI500_PORT_S0: | |
573 | case CCI500_PORT_S1: | |
574 | case CCI500_PORT_S2: | |
575 | case CCI500_PORT_S3: | |
576 | case CCI500_PORT_S4: | |
577 | case CCI500_PORT_S5: | |
578 | case CCI500_PORT_S6: | |
579 | if_type = CCI_IF_SLAVE; | |
580 | break; | |
581 | case CCI500_PORT_M0: | |
582 | case CCI500_PORT_M1: | |
583 | case CCI500_PORT_M2: | |
584 | case CCI500_PORT_M3: | |
585 | case CCI500_PORT_M4: | |
586 | case CCI500_PORT_M5: | |
587 | if_type = CCI_IF_MASTER; | |
588 | break; | |
589 | case CCI500_PORT_GLOBAL: | |
590 | if_type = CCI_IF_GLOBAL; | |
591 | break; | |
592 | default: | |
593 | return -ENOENT; | |
594 | } | |
595 | ||
596 | if (ev_code >= cci_pmu->model->event_ranges[if_type].min && | |
597 | ev_code <= cci_pmu->model->event_ranges[if_type].max) | |
598 | return hw_event; | |
599 | ||
600 | return -ENOENT; | |
601 | } | |
602 | #endif /* CONFIG_ARM_CCI500_PMU */ | |
603 | ||
e14cfad3 SP |
604 | static ssize_t cci_pmu_format_show(struct device *dev, |
605 | struct device_attribute *attr, char *buf) | |
606 | { | |
607 | struct dev_ext_attribute *eattr = container_of(attr, | |
608 | struct dev_ext_attribute, attr); | |
609 | return snprintf(buf, PAGE_SIZE, "%s\n", (char *)eattr->var); | |
610 | } | |
611 | ||
612 | static ssize_t cci_pmu_event_show(struct device *dev, | |
613 | struct device_attribute *attr, char *buf) | |
614 | { | |
615 | struct dev_ext_attribute *eattr = container_of(attr, | |
616 | struct dev_ext_attribute, attr); | |
617 | /* source parameter is mandatory for normal PMU events */ | |
618 | return snprintf(buf, PAGE_SIZE, "source=?,event=0x%lx\n", | |
619 | (unsigned long)eattr->var); | |
620 | } | |
621 | ||
c6f85cb4 | 622 | static int pmu_is_valid_counter(struct cci_pmu *cci_pmu, int idx) |
b91c8f28 | 623 | { |
ab5b316d | 624 | return 0 <= idx && idx <= CCI_PMU_CNTR_LAST(cci_pmu); |
b91c8f28 PA |
625 | } |
626 | ||
a1a076d7 | 627 | static u32 pmu_read_register(struct cci_pmu *cci_pmu, int idx, unsigned int offset) |
b91c8f28 | 628 | { |
ab5b316d SP |
629 | return readl_relaxed(cci_pmu->base + |
630 | CCI_PMU_CNTR_BASE(cci_pmu->model, idx) + offset); | |
b91c8f28 PA |
631 | } |
632 | ||
a1a076d7 SP |
633 | static void pmu_write_register(struct cci_pmu *cci_pmu, u32 value, |
634 | int idx, unsigned int offset) | |
b91c8f28 | 635 | { |
a1a076d7 | 636 | return writel_relaxed(value, cci_pmu->base + |
ab5b316d | 637 | CCI_PMU_CNTR_BASE(cci_pmu->model, idx) + offset); |
b91c8f28 PA |
638 | } |
639 | ||
a1a076d7 | 640 | static void pmu_disable_counter(struct cci_pmu *cci_pmu, int idx) |
b91c8f28 | 641 | { |
a1a076d7 | 642 | pmu_write_register(cci_pmu, 0, idx, CCI_PMU_CNTR_CTRL); |
b91c8f28 PA |
643 | } |
644 | ||
a1a076d7 | 645 | static void pmu_enable_counter(struct cci_pmu *cci_pmu, int idx) |
b91c8f28 | 646 | { |
a1a076d7 | 647 | pmu_write_register(cci_pmu, 1, idx, CCI_PMU_CNTR_CTRL); |
b91c8f28 PA |
648 | } |
649 | ||
a1a076d7 | 650 | static void pmu_set_event(struct cci_pmu *cci_pmu, int idx, unsigned long event) |
b91c8f28 | 651 | { |
a1a076d7 | 652 | pmu_write_register(cci_pmu, event, idx, CCI_PMU_EVT_SEL); |
b91c8f28 PA |
653 | } |
654 | ||
ab5b316d SP |
655 | /* |
656 | * Returns the number of programmable counters actually implemented | |
657 | * by the cci | |
658 | */ | |
b91c8f28 PA |
659 | static u32 pmu_get_max_counters(void) |
660 | { | |
ab5b316d SP |
661 | return (readl_relaxed(cci_ctrl_base + CCI_PMCR) & |
662 | CCI_PMCR_NCNT_MASK) >> CCI_PMCR_NCNT_SHIFT; | |
b91c8f28 PA |
663 | } |
664 | ||
c6f85cb4 | 665 | static int pmu_get_event_idx(struct cci_pmu_hw_events *hw, struct perf_event *event) |
b91c8f28 | 666 | { |
c6f85cb4 | 667 | struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu); |
31216290 | 668 | unsigned long cci_event = event->hw.config_base; |
b91c8f28 PA |
669 | int idx; |
670 | ||
31216290 SP |
671 | if (cci_pmu->model->get_event_idx) |
672 | return cci_pmu->model->get_event_idx(cci_pmu, hw, cci_event); | |
b91c8f28 | 673 | |
31216290 SP |
674 | /* Generic code to find an unused idx from the mask */ |
675 | for(idx = 0; idx <= CCI_PMU_CNTR_LAST(cci_pmu); idx++) | |
b91c8f28 PA |
676 | if (!test_and_set_bit(idx, hw->used_mask)) |
677 | return idx; | |
678 | ||
679 | /* No counters available */ | |
680 | return -EAGAIN; | |
681 | } | |
682 | ||
683 | static int pmu_map_event(struct perf_event *event) | |
684 | { | |
31216290 | 685 | struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu); |
b91c8f28 | 686 | |
31216290 SP |
687 | if (event->attr.type < PERF_TYPE_MAX || |
688 | !cci_pmu->model->validate_hw_event) | |
b91c8f28 PA |
689 | return -ENOENT; |
690 | ||
31216290 | 691 | return cci_pmu->model->validate_hw_event(cci_pmu, event->attr.config); |
b91c8f28 PA |
692 | } |
693 | ||
c6f85cb4 | 694 | static int pmu_request_irq(struct cci_pmu *cci_pmu, irq_handler_t handler) |
b91c8f28 PA |
695 | { |
696 | int i; | |
697 | struct platform_device *pmu_device = cci_pmu->plat_device; | |
698 | ||
699 | if (unlikely(!pmu_device)) | |
700 | return -ENODEV; | |
701 | ||
a1a076d7 | 702 | if (cci_pmu->nr_irqs < 1) { |
b91c8f28 PA |
703 | dev_err(&pmu_device->dev, "no irqs for CCI PMUs defined\n"); |
704 | return -ENODEV; | |
705 | } | |
706 | ||
707 | /* | |
708 | * Register all available CCI PMU interrupts. In the interrupt handler | |
709 | * we iterate over the counters checking for interrupt source (the | |
710 | * overflowing counter) and clear it. | |
711 | * | |
712 | * This should allow handling of non-unique interrupt for the counters. | |
713 | */ | |
a1a076d7 SP |
714 | for (i = 0; i < cci_pmu->nr_irqs; i++) { |
715 | int err = request_irq(cci_pmu->irqs[i], handler, IRQF_SHARED, | |
b91c8f28 PA |
716 | "arm-cci-pmu", cci_pmu); |
717 | if (err) { | |
718 | dev_err(&pmu_device->dev, "unable to request IRQ%d for ARM CCI PMU counters\n", | |
a1a076d7 | 719 | cci_pmu->irqs[i]); |
b91c8f28 PA |
720 | return err; |
721 | } | |
722 | ||
a1a076d7 | 723 | set_bit(i, &cci_pmu->active_irqs); |
b91c8f28 PA |
724 | } |
725 | ||
726 | return 0; | |
727 | } | |
728 | ||
c6f85cb4 MR |
729 | static void pmu_free_irq(struct cci_pmu *cci_pmu) |
730 | { | |
731 | int i; | |
732 | ||
a1a076d7 SP |
733 | for (i = 0; i < cci_pmu->nr_irqs; i++) { |
734 | if (!test_and_clear_bit(i, &cci_pmu->active_irqs)) | |
c6f85cb4 MR |
735 | continue; |
736 | ||
a1a076d7 | 737 | free_irq(cci_pmu->irqs[i], cci_pmu); |
c6f85cb4 MR |
738 | } |
739 | } | |
740 | ||
741 | static u32 pmu_read_counter(struct perf_event *event) | |
742 | { | |
743 | struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu); | |
744 | struct hw_perf_event *hw_counter = &event->hw; | |
745 | int idx = hw_counter->idx; | |
746 | u32 value; | |
747 | ||
748 | if (unlikely(!pmu_is_valid_counter(cci_pmu, idx))) { | |
749 | dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx); | |
750 | return 0; | |
751 | } | |
a1a076d7 | 752 | value = pmu_read_register(cci_pmu, idx, CCI_PMU_CNTR); |
c6f85cb4 MR |
753 | |
754 | return value; | |
755 | } | |
756 | ||
757 | static void pmu_write_counter(struct perf_event *event, u32 value) | |
758 | { | |
759 | struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu); | |
760 | struct hw_perf_event *hw_counter = &event->hw; | |
761 | int idx = hw_counter->idx; | |
762 | ||
763 | if (unlikely(!pmu_is_valid_counter(cci_pmu, idx))) | |
764 | dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx); | |
765 | else | |
a1a076d7 | 766 | pmu_write_register(cci_pmu, value, idx, CCI_PMU_CNTR); |
c6f85cb4 MR |
767 | } |
768 | ||
769 | static u64 pmu_event_update(struct perf_event *event) | |
770 | { | |
771 | struct hw_perf_event *hwc = &event->hw; | |
772 | u64 delta, prev_raw_count, new_raw_count; | |
773 | ||
774 | do { | |
775 | prev_raw_count = local64_read(&hwc->prev_count); | |
776 | new_raw_count = pmu_read_counter(event); | |
777 | } while (local64_cmpxchg(&hwc->prev_count, prev_raw_count, | |
778 | new_raw_count) != prev_raw_count); | |
779 | ||
780 | delta = (new_raw_count - prev_raw_count) & CCI_PMU_CNTR_MASK; | |
781 | ||
782 | local64_add(delta, &event->count); | |
783 | ||
784 | return new_raw_count; | |
785 | } | |
786 | ||
787 | static void pmu_read(struct perf_event *event) | |
788 | { | |
789 | pmu_event_update(event); | |
790 | } | |
791 | ||
792 | void pmu_event_set_period(struct perf_event *event) | |
793 | { | |
794 | struct hw_perf_event *hwc = &event->hw; | |
795 | /* | |
796 | * The CCI PMU counters have a period of 2^32. To account for the | |
797 | * possiblity of extreme interrupt latency we program for a period of | |
798 | * half that. Hopefully we can handle the interrupt before another 2^31 | |
799 | * events occur and the counter overtakes its previous value. | |
800 | */ | |
801 | u64 val = 1ULL << 31; | |
802 | local64_set(&hwc->prev_count, val); | |
803 | pmu_write_counter(event, val); | |
804 | } | |
805 | ||
b91c8f28 PA |
806 | static irqreturn_t pmu_handle_irq(int irq_num, void *dev) |
807 | { | |
808 | unsigned long flags; | |
c6f85cb4 | 809 | struct cci_pmu *cci_pmu = dev; |
a1a076d7 | 810 | struct cci_pmu_hw_events *events = &cci_pmu->hw_events; |
b91c8f28 PA |
811 | int idx, handled = IRQ_NONE; |
812 | ||
813 | raw_spin_lock_irqsave(&events->pmu_lock, flags); | |
b91c8f28 PA |
814 | /* |
815 | * Iterate over counters and update the corresponding perf events. | |
816 | * This should work regardless of whether we have per-counter overflow | |
817 | * interrupt or a combined overflow interrupt. | |
818 | */ | |
31216290 | 819 | for (idx = 0; idx <= CCI_PMU_CNTR_LAST(cci_pmu); idx++) { |
b91c8f28 PA |
820 | struct perf_event *event = events->events[idx]; |
821 | struct hw_perf_event *hw_counter; | |
822 | ||
823 | if (!event) | |
824 | continue; | |
825 | ||
826 | hw_counter = &event->hw; | |
827 | ||
828 | /* Did this counter overflow? */ | |
a1a076d7 | 829 | if (!(pmu_read_register(cci_pmu, idx, CCI_PMU_OVRFLW) & |
fc5130de | 830 | CCI_PMU_OVRFLW_FLAG)) |
b91c8f28 PA |
831 | continue; |
832 | ||
a1a076d7 SP |
833 | pmu_write_register(cci_pmu, CCI_PMU_OVRFLW_FLAG, idx, |
834 | CCI_PMU_OVRFLW); | |
b91c8f28 | 835 | |
c6f85cb4 MR |
836 | pmu_event_update(event); |
837 | pmu_event_set_period(event); | |
b91c8f28 | 838 | handled = IRQ_HANDLED; |
b91c8f28 PA |
839 | } |
840 | raw_spin_unlock_irqrestore(&events->pmu_lock, flags); | |
841 | ||
842 | return IRQ_RETVAL(handled); | |
843 | } | |
844 | ||
c6f85cb4 | 845 | static int cci_pmu_get_hw(struct cci_pmu *cci_pmu) |
b91c8f28 | 846 | { |
c6f85cb4 MR |
847 | int ret = pmu_request_irq(cci_pmu, pmu_handle_irq); |
848 | if (ret) { | |
849 | pmu_free_irq(cci_pmu); | |
850 | return ret; | |
851 | } | |
852 | return 0; | |
853 | } | |
b91c8f28 | 854 | |
c6f85cb4 MR |
855 | static void cci_pmu_put_hw(struct cci_pmu *cci_pmu) |
856 | { | |
857 | pmu_free_irq(cci_pmu); | |
858 | } | |
b91c8f28 | 859 | |
c6f85cb4 MR |
860 | static void hw_perf_event_destroy(struct perf_event *event) |
861 | { | |
862 | struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu); | |
863 | atomic_t *active_events = &cci_pmu->active_events; | |
864 | struct mutex *reserve_mutex = &cci_pmu->reserve_mutex; | |
865 | ||
866 | if (atomic_dec_and_mutex_lock(active_events, reserve_mutex)) { | |
867 | cci_pmu_put_hw(cci_pmu); | |
868 | mutex_unlock(reserve_mutex); | |
b91c8f28 PA |
869 | } |
870 | } | |
871 | ||
c6f85cb4 | 872 | static void cci_pmu_enable(struct pmu *pmu) |
b91c8f28 | 873 | { |
c6f85cb4 MR |
874 | struct cci_pmu *cci_pmu = to_cci_pmu(pmu); |
875 | struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events; | |
ab5b316d | 876 | int enabled = bitmap_weight(hw_events->used_mask, cci_pmu->num_cntrs); |
b91c8f28 | 877 | unsigned long flags; |
c6f85cb4 MR |
878 | u32 val; |
879 | ||
880 | if (!enabled) | |
881 | return; | |
882 | ||
883 | raw_spin_lock_irqsave(&hw_events->pmu_lock, flags); | |
884 | ||
885 | /* Enable all the PMU counters. */ | |
886 | val = readl_relaxed(cci_ctrl_base + CCI_PMCR) | CCI_PMCR_CEN; | |
887 | writel(val, cci_ctrl_base + CCI_PMCR); | |
888 | raw_spin_unlock_irqrestore(&hw_events->pmu_lock, flags); | |
889 | ||
890 | } | |
891 | ||
892 | static void cci_pmu_disable(struct pmu *pmu) | |
893 | { | |
894 | struct cci_pmu *cci_pmu = to_cci_pmu(pmu); | |
895 | struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events; | |
896 | unsigned long flags; | |
897 | u32 val; | |
898 | ||
899 | raw_spin_lock_irqsave(&hw_events->pmu_lock, flags); | |
900 | ||
901 | /* Disable all the PMU counters. */ | |
902 | val = readl_relaxed(cci_ctrl_base + CCI_PMCR) & ~CCI_PMCR_CEN; | |
903 | writel(val, cci_ctrl_base + CCI_PMCR); | |
904 | raw_spin_unlock_irqrestore(&hw_events->pmu_lock, flags); | |
905 | } | |
906 | ||
31216290 SP |
907 | /* |
908 | * Check if the idx represents a non-programmable counter. | |
909 | * All the fixed event counters are mapped before the programmable | |
910 | * counters. | |
911 | */ | |
912 | static bool pmu_fixed_hw_idx(struct cci_pmu *cci_pmu, int idx) | |
913 | { | |
914 | return (idx >= 0) && (idx < cci_pmu->model->fixed_hw_cntrs); | |
915 | } | |
916 | ||
c6f85cb4 MR |
917 | static void cci_pmu_start(struct perf_event *event, int pmu_flags) |
918 | { | |
919 | struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu); | |
920 | struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events; | |
921 | struct hw_perf_event *hwc = &event->hw; | |
922 | int idx = hwc->idx; | |
923 | unsigned long flags; | |
924 | ||
925 | /* | |
926 | * To handle interrupt latency, we always reprogram the period | |
927 | * regardlesss of PERF_EF_RELOAD. | |
928 | */ | |
929 | if (pmu_flags & PERF_EF_RELOAD) | |
930 | WARN_ON_ONCE(!(hwc->state & PERF_HES_UPTODATE)); | |
931 | ||
932 | hwc->state = 0; | |
b91c8f28 PA |
933 | |
934 | if (unlikely(!pmu_is_valid_counter(cci_pmu, idx))) { | |
935 | dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx); | |
936 | return; | |
937 | } | |
938 | ||
c6f85cb4 | 939 | raw_spin_lock_irqsave(&hw_events->pmu_lock, flags); |
b91c8f28 | 940 | |
31216290 SP |
941 | /* Configure the counter unless you are counting a fixed event */ |
942 | if (!pmu_fixed_hw_idx(cci_pmu, idx)) | |
a1a076d7 | 943 | pmu_set_event(cci_pmu, idx, hwc->config_base); |
b91c8f28 | 944 | |
c6f85cb4 | 945 | pmu_event_set_period(event); |
a1a076d7 | 946 | pmu_enable_counter(cci_pmu, idx); |
b91c8f28 | 947 | |
c6f85cb4 | 948 | raw_spin_unlock_irqrestore(&hw_events->pmu_lock, flags); |
b91c8f28 PA |
949 | } |
950 | ||
c6f85cb4 | 951 | static void cci_pmu_stop(struct perf_event *event, int pmu_flags) |
b91c8f28 | 952 | { |
c6f85cb4 MR |
953 | struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu); |
954 | struct hw_perf_event *hwc = &event->hw; | |
955 | int idx = hwc->idx; | |
956 | ||
957 | if (hwc->state & PERF_HES_STOPPED) | |
958 | return; | |
b91c8f28 PA |
959 | |
960 | if (unlikely(!pmu_is_valid_counter(cci_pmu, idx))) { | |
961 | dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx); | |
962 | return; | |
963 | } | |
964 | ||
c6f85cb4 MR |
965 | /* |
966 | * We always reprogram the counter, so ignore PERF_EF_UPDATE. See | |
967 | * cci_pmu_start() | |
968 | */ | |
a1a076d7 | 969 | pmu_disable_counter(cci_pmu, idx); |
c6f85cb4 MR |
970 | pmu_event_update(event); |
971 | hwc->state |= PERF_HES_STOPPED | PERF_HES_UPTODATE; | |
b91c8f28 PA |
972 | } |
973 | ||
c6f85cb4 | 974 | static int cci_pmu_add(struct perf_event *event, int flags) |
b91c8f28 | 975 | { |
c6f85cb4 MR |
976 | struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu); |
977 | struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events; | |
978 | struct hw_perf_event *hwc = &event->hw; | |
979 | int idx; | |
980 | int err = 0; | |
b91c8f28 | 981 | |
c6f85cb4 | 982 | perf_pmu_disable(event->pmu); |
b91c8f28 | 983 | |
c6f85cb4 MR |
984 | /* If we don't have a space for the counter then finish early. */ |
985 | idx = pmu_get_event_idx(hw_events, event); | |
986 | if (idx < 0) { | |
987 | err = idx; | |
988 | goto out; | |
989 | } | |
b91c8f28 | 990 | |
c6f85cb4 MR |
991 | event->hw.idx = idx; |
992 | hw_events->events[idx] = event; | |
993 | ||
994 | hwc->state = PERF_HES_STOPPED | PERF_HES_UPTODATE; | |
995 | if (flags & PERF_EF_START) | |
996 | cci_pmu_start(event, PERF_EF_RELOAD); | |
997 | ||
998 | /* Propagate our changes to the userspace mapping. */ | |
999 | perf_event_update_userpage(event); | |
1000 | ||
1001 | out: | |
1002 | perf_pmu_enable(event->pmu); | |
1003 | return err; | |
b91c8f28 PA |
1004 | } |
1005 | ||
c6f85cb4 | 1006 | static void cci_pmu_del(struct perf_event *event, int flags) |
b91c8f28 | 1007 | { |
c6f85cb4 MR |
1008 | struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu); |
1009 | struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events; | |
1010 | struct hw_perf_event *hwc = &event->hw; | |
1011 | int idx = hwc->idx; | |
b91c8f28 | 1012 | |
c6f85cb4 MR |
1013 | cci_pmu_stop(event, PERF_EF_UPDATE); |
1014 | hw_events->events[idx] = NULL; | |
1015 | clear_bit(idx, hw_events->used_mask); | |
b91c8f28 | 1016 | |
c6f85cb4 MR |
1017 | perf_event_update_userpage(event); |
1018 | } | |
b91c8f28 | 1019 | |
c6f85cb4 | 1020 | static int |
b1862199 SP |
1021 | validate_event(struct pmu *cci_pmu, |
1022 | struct cci_pmu_hw_events *hw_events, | |
1023 | struct perf_event *event) | |
c6f85cb4 MR |
1024 | { |
1025 | if (is_software_event(event)) | |
1026 | return 1; | |
1027 | ||
b1862199 SP |
1028 | /* |
1029 | * Reject groups spanning multiple HW PMUs (e.g. CPU + CCI). The | |
1030 | * core perf code won't check that the pmu->ctx == leader->ctx | |
1031 | * until after pmu->event_init(event). | |
1032 | */ | |
1033 | if (event->pmu != cci_pmu) | |
1034 | return 0; | |
1035 | ||
c6f85cb4 MR |
1036 | if (event->state < PERF_EVENT_STATE_OFF) |
1037 | return 1; | |
1038 | ||
1039 | if (event->state == PERF_EVENT_STATE_OFF && !event->attr.enable_on_exec) | |
1040 | return 1; | |
1041 | ||
1042 | return pmu_get_event_idx(hw_events, event) >= 0; | |
b91c8f28 PA |
1043 | } |
1044 | ||
c6f85cb4 MR |
1045 | static int |
1046 | validate_group(struct perf_event *event) | |
b91c8f28 | 1047 | { |
c6f85cb4 | 1048 | struct perf_event *sibling, *leader = event->group_leader; |
ab5b316d SP |
1049 | struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu); |
1050 | unsigned long mask[BITS_TO_LONGS(cci_pmu->num_cntrs)]; | |
c6f85cb4 MR |
1051 | struct cci_pmu_hw_events fake_pmu = { |
1052 | /* | |
1053 | * Initialise the fake PMU. We only need to populate the | |
1054 | * used_mask for the purposes of validation. | |
1055 | */ | |
ab5b316d | 1056 | .used_mask = mask, |
c6f85cb4 | 1057 | }; |
ab5b316d | 1058 | memset(mask, 0, BITS_TO_LONGS(cci_pmu->num_cntrs) * sizeof(unsigned long)); |
b91c8f28 | 1059 | |
b1862199 | 1060 | if (!validate_event(event->pmu, &fake_pmu, leader)) |
c6f85cb4 MR |
1061 | return -EINVAL; |
1062 | ||
1063 | list_for_each_entry(sibling, &leader->sibling_list, group_entry) { | |
b1862199 | 1064 | if (!validate_event(event->pmu, &fake_pmu, sibling)) |
c6f85cb4 | 1065 | return -EINVAL; |
b91c8f28 | 1066 | } |
b91c8f28 | 1067 | |
b1862199 | 1068 | if (!validate_event(event->pmu, &fake_pmu, event)) |
c6f85cb4 MR |
1069 | return -EINVAL; |
1070 | ||
1071 | return 0; | |
b91c8f28 PA |
1072 | } |
1073 | ||
c6f85cb4 MR |
1074 | static int |
1075 | __hw_perf_event_init(struct perf_event *event) | |
b91c8f28 | 1076 | { |
c6f85cb4 MR |
1077 | struct hw_perf_event *hwc = &event->hw; |
1078 | int mapping; | |
b91c8f28 | 1079 | |
c6f85cb4 MR |
1080 | mapping = pmu_map_event(event); |
1081 | ||
1082 | if (mapping < 0) { | |
1083 | pr_debug("event %x:%llx not supported\n", event->attr.type, | |
1084 | event->attr.config); | |
1085 | return mapping; | |
1086 | } | |
1087 | ||
1088 | /* | |
1089 | * We don't assign an index until we actually place the event onto | |
1090 | * hardware. Use -1 to signify that we haven't decided where to put it | |
1091 | * yet. | |
1092 | */ | |
1093 | hwc->idx = -1; | |
1094 | hwc->config_base = 0; | |
1095 | hwc->config = 0; | |
1096 | hwc->event_base = 0; | |
1097 | ||
1098 | /* | |
1099 | * Store the event encoding into the config_base field. | |
1100 | */ | |
1101 | hwc->config_base |= (unsigned long)mapping; | |
1102 | ||
1103 | /* | |
1104 | * Limit the sample_period to half of the counter width. That way, the | |
1105 | * new counter value is far less likely to overtake the previous one | |
1106 | * unless you have some serious IRQ latency issues. | |
1107 | */ | |
1108 | hwc->sample_period = CCI_PMU_CNTR_MASK >> 1; | |
1109 | hwc->last_period = hwc->sample_period; | |
1110 | local64_set(&hwc->period_left, hwc->sample_period); | |
1111 | ||
1112 | if (event->group_leader != event) { | |
1113 | if (validate_group(event) != 0) | |
1114 | return -EINVAL; | |
1115 | } | |
1116 | ||
1117 | return 0; | |
1118 | } | |
1119 | ||
1120 | static int cci_pmu_event_init(struct perf_event *event) | |
1121 | { | |
1122 | struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu); | |
1123 | atomic_t *active_events = &cci_pmu->active_events; | |
1124 | int err = 0; | |
1125 | int cpu; | |
1126 | ||
1127 | if (event->attr.type != event->pmu->type) | |
1128 | return -ENOENT; | |
1129 | ||
1130 | /* Shared by all CPUs, no meaningful state to sample */ | |
1131 | if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK) | |
1132 | return -EOPNOTSUPP; | |
1133 | ||
1134 | /* We have no filtering of any kind */ | |
1135 | if (event->attr.exclude_user || | |
1136 | event->attr.exclude_kernel || | |
1137 | event->attr.exclude_hv || | |
1138 | event->attr.exclude_idle || | |
1139 | event->attr.exclude_host || | |
1140 | event->attr.exclude_guest) | |
1141 | return -EINVAL; | |
1142 | ||
1143 | /* | |
1144 | * Following the example set by other "uncore" PMUs, we accept any CPU | |
1145 | * and rewrite its affinity dynamically rather than having perf core | |
1146 | * handle cpu == -1 and pid == -1 for this case. | |
1147 | * | |
1148 | * The perf core will pin online CPUs for the duration of this call and | |
1149 | * the event being installed into its context, so the PMU's CPU can't | |
1150 | * change under our feet. | |
1151 | */ | |
1152 | cpu = cpumask_first(&cci_pmu->cpus); | |
1153 | if (event->cpu < 0 || cpu < 0) | |
1154 | return -EINVAL; | |
1155 | event->cpu = cpu; | |
1156 | ||
1157 | event->destroy = hw_perf_event_destroy; | |
1158 | if (!atomic_inc_not_zero(active_events)) { | |
1159 | mutex_lock(&cci_pmu->reserve_mutex); | |
1160 | if (atomic_read(active_events) == 0) | |
1161 | err = cci_pmu_get_hw(cci_pmu); | |
1162 | if (!err) | |
1163 | atomic_inc(active_events); | |
1164 | mutex_unlock(&cci_pmu->reserve_mutex); | |
1165 | } | |
1166 | if (err) | |
1167 | return err; | |
1168 | ||
1169 | err = __hw_perf_event_init(event); | |
1170 | if (err) | |
1171 | hw_perf_event_destroy(event); | |
1172 | ||
1173 | return err; | |
b91c8f28 PA |
1174 | } |
1175 | ||
a1a076d7 | 1176 | static ssize_t pmu_cpumask_attr_show(struct device *dev, |
c6f85cb4 MR |
1177 | struct device_attribute *attr, char *buf) |
1178 | { | |
a1a076d7 SP |
1179 | struct dev_ext_attribute *eattr = container_of(attr, |
1180 | struct dev_ext_attribute, attr); | |
1181 | struct cci_pmu *cci_pmu = eattr->var; | |
1182 | ||
660e5ec0 | 1183 | int n = scnprintf(buf, PAGE_SIZE - 1, "%*pbl", |
a1a076d7 | 1184 | cpumask_pr_args(&cci_pmu->cpus)); |
c6f85cb4 MR |
1185 | buf[n++] = '\n'; |
1186 | buf[n] = '\0'; | |
1187 | return n; | |
1188 | } | |
1189 | ||
a1a076d7 SP |
1190 | static struct dev_ext_attribute pmu_cpumask_attr = { |
1191 | __ATTR(cpumask, S_IRUGO, pmu_cpumask_attr_show, NULL), | |
1192 | NULL, /* Populated in cci_pmu_init */ | |
1193 | }; | |
c6f85cb4 MR |
1194 | |
1195 | static struct attribute *pmu_attrs[] = { | |
a1a076d7 | 1196 | &pmu_cpumask_attr.attr.attr, |
c6f85cb4 MR |
1197 | NULL, |
1198 | }; | |
1199 | ||
1200 | static struct attribute_group pmu_attr_group = { | |
1201 | .attrs = pmu_attrs, | |
1202 | }; | |
1203 | ||
e14cfad3 SP |
1204 | static struct attribute_group pmu_format_attr_group = { |
1205 | .name = "format", | |
1206 | .attrs = NULL, /* Filled in cci_pmu_init_attrs */ | |
1207 | }; | |
1208 | ||
1209 | static struct attribute_group pmu_event_attr_group = { | |
1210 | .name = "events", | |
1211 | .attrs = NULL, /* Filled in cci_pmu_init_attrs */ | |
1212 | }; | |
1213 | ||
c6f85cb4 MR |
1214 | static const struct attribute_group *pmu_attr_groups[] = { |
1215 | &pmu_attr_group, | |
e14cfad3 SP |
1216 | &pmu_format_attr_group, |
1217 | &pmu_event_attr_group, | |
c6f85cb4 MR |
1218 | NULL |
1219 | }; | |
1220 | ||
e14cfad3 SP |
1221 | static struct attribute **alloc_attrs(struct platform_device *pdev, |
1222 | int n, struct dev_ext_attribute *source) | |
1223 | { | |
1224 | int i; | |
1225 | struct attribute **attrs; | |
1226 | ||
1227 | /* Alloc n + 1 (for terminating NULL) */ | |
1228 | attrs = devm_kcalloc(&pdev->dev, n + 1, sizeof(struct attribute *), | |
1229 | GFP_KERNEL); | |
1230 | if (!attrs) | |
1231 | return attrs; | |
1232 | for(i = 0; i < n; i++) | |
1233 | attrs[i] = &source[i].attr.attr; | |
1234 | return attrs; | |
1235 | } | |
1236 | ||
1237 | static int cci_pmu_init_attrs(struct cci_pmu *cci_pmu, struct platform_device *pdev) | |
1238 | { | |
1239 | const struct cci_pmu_model *model = cci_pmu->model; | |
1240 | struct attribute **attrs; | |
1241 | ||
1242 | /* | |
1243 | * All allocations below are managed, hence doesn't need to be | |
1244 | * free'd explicitly in case of an error. | |
1245 | */ | |
1246 | ||
1247 | if (model->nevent_attrs) { | |
1248 | attrs = alloc_attrs(pdev, model->nevent_attrs, | |
1249 | model->event_attrs); | |
1250 | if (!attrs) | |
1251 | return -ENOMEM; | |
1252 | pmu_event_attr_group.attrs = attrs; | |
1253 | } | |
1254 | if (model->nformat_attrs) { | |
1255 | attrs = alloc_attrs(pdev, model->nformat_attrs, | |
1256 | model->format_attrs); | |
1257 | if (!attrs) | |
1258 | return -ENOMEM; | |
1259 | pmu_format_attr_group.attrs = attrs; | |
1260 | } | |
1261 | pmu_cpumask_attr.var = cci_pmu; | |
1262 | ||
1263 | return 0; | |
1264 | } | |
1265 | ||
c6f85cb4 MR |
1266 | static int cci_pmu_init(struct cci_pmu *cci_pmu, struct platform_device *pdev) |
1267 | { | |
fc17c839 | 1268 | char *name = cci_pmu->model->name; |
ab5b316d | 1269 | u32 num_cntrs; |
e14cfad3 SP |
1270 | int rc; |
1271 | ||
1272 | rc = cci_pmu_init_attrs(cci_pmu, pdev); | |
1273 | if (rc) | |
1274 | return rc; | |
a1a076d7 | 1275 | |
c6f85cb4 | 1276 | cci_pmu->pmu = (struct pmu) { |
fc17c839 | 1277 | .name = cci_pmu->model->name, |
c6f85cb4 MR |
1278 | .task_ctx_nr = perf_invalid_context, |
1279 | .pmu_enable = cci_pmu_enable, | |
1280 | .pmu_disable = cci_pmu_disable, | |
1281 | .event_init = cci_pmu_event_init, | |
1282 | .add = cci_pmu_add, | |
1283 | .del = cci_pmu_del, | |
1284 | .start = cci_pmu_start, | |
1285 | .stop = cci_pmu_stop, | |
1286 | .read = pmu_read, | |
1287 | .attr_groups = pmu_attr_groups, | |
b91c8f28 PA |
1288 | }; |
1289 | ||
1290 | cci_pmu->plat_device = pdev; | |
ab5b316d SP |
1291 | num_cntrs = pmu_get_max_counters(); |
1292 | if (num_cntrs > cci_pmu->model->num_hw_cntrs) { | |
1293 | dev_warn(&pdev->dev, | |
1294 | "PMU implements more counters(%d) than supported by" | |
1295 | " the model(%d), truncated.", | |
1296 | num_cntrs, cci_pmu->model->num_hw_cntrs); | |
1297 | num_cntrs = cci_pmu->model->num_hw_cntrs; | |
1298 | } | |
1299 | cci_pmu->num_cntrs = num_cntrs + cci_pmu->model->fixed_hw_cntrs; | |
b91c8f28 | 1300 | |
c6f85cb4 | 1301 | return perf_pmu_register(&cci_pmu->pmu, name, -1); |
b91c8f28 PA |
1302 | } |
1303 | ||
c6f85cb4 MR |
1304 | static int cci_pmu_cpu_notifier(struct notifier_block *self, |
1305 | unsigned long action, void *hcpu) | |
1306 | { | |
a1a076d7 SP |
1307 | struct cci_pmu *cci_pmu = container_of(self, |
1308 | struct cci_pmu, cpu_nb); | |
c6f85cb4 MR |
1309 | unsigned int cpu = (long)hcpu; |
1310 | unsigned int target; | |
1311 | ||
1312 | switch (action & ~CPU_TASKS_FROZEN) { | |
1313 | case CPU_DOWN_PREPARE: | |
a1a076d7 | 1314 | if (!cpumask_test_and_clear_cpu(cpu, &cci_pmu->cpus)) |
c6f85cb4 MR |
1315 | break; |
1316 | target = cpumask_any_but(cpu_online_mask, cpu); | |
1317 | if (target < 0) // UP, last CPU | |
1318 | break; | |
1319 | /* | |
1320 | * TODO: migrate context once core races on event->ctx have | |
1321 | * been fixed. | |
1322 | */ | |
a1a076d7 | 1323 | cpumask_set_cpu(target, &cci_pmu->cpus); |
c6f85cb4 MR |
1324 | default: |
1325 | break; | |
1326 | } | |
1327 | ||
1328 | return NOTIFY_OK; | |
1329 | } | |
1330 | ||
fc17c839 | 1331 | static struct cci_pmu_model cci_pmu_models[] = { |
f4d58938 SP |
1332 | #ifdef CONFIG_ARM_CCI400_PMU |
1333 | [CCI400_R0] = { | |
fc17c839 | 1334 | .name = "CCI_400", |
ab5b316d SP |
1335 | .fixed_hw_cntrs = 1, /* Cycle counter */ |
1336 | .num_hw_cntrs = 4, | |
1337 | .cntr_size = SZ_4K, | |
e14cfad3 SP |
1338 | .format_attrs = cci400_pmu_format_attrs, |
1339 | .nformat_attrs = ARRAY_SIZE(cci400_pmu_format_attrs), | |
1340 | .event_attrs = cci400_r0_pmu_event_attrs, | |
1341 | .nevent_attrs = ARRAY_SIZE(cci400_r0_pmu_event_attrs), | |
fc17c839 SP |
1342 | .event_ranges = { |
1343 | [CCI_IF_SLAVE] = { | |
f4d58938 SP |
1344 | CCI400_R0_SLAVE_PORT_MIN_EV, |
1345 | CCI400_R0_SLAVE_PORT_MAX_EV, | |
fc17c839 SP |
1346 | }, |
1347 | [CCI_IF_MASTER] = { | |
f4d58938 SP |
1348 | CCI400_R0_MASTER_PORT_MIN_EV, |
1349 | CCI400_R0_MASTER_PORT_MAX_EV, | |
fc17c839 SP |
1350 | }, |
1351 | }, | |
31216290 SP |
1352 | .validate_hw_event = cci400_validate_hw_event, |
1353 | .get_event_idx = cci400_get_event_idx, | |
fc17c839 | 1354 | }, |
f4d58938 | 1355 | [CCI400_R1] = { |
fc17c839 | 1356 | .name = "CCI_400_r1", |
ab5b316d SP |
1357 | .fixed_hw_cntrs = 1, /* Cycle counter */ |
1358 | .num_hw_cntrs = 4, | |
1359 | .cntr_size = SZ_4K, | |
e14cfad3 SP |
1360 | .format_attrs = cci400_pmu_format_attrs, |
1361 | .nformat_attrs = ARRAY_SIZE(cci400_pmu_format_attrs), | |
1362 | .event_attrs = cci400_r1_pmu_event_attrs, | |
1363 | .nevent_attrs = ARRAY_SIZE(cci400_r1_pmu_event_attrs), | |
fc17c839 SP |
1364 | .event_ranges = { |
1365 | [CCI_IF_SLAVE] = { | |
f4d58938 SP |
1366 | CCI400_R1_SLAVE_PORT_MIN_EV, |
1367 | CCI400_R1_SLAVE_PORT_MAX_EV, | |
fc17c839 SP |
1368 | }, |
1369 | [CCI_IF_MASTER] = { | |
f4d58938 SP |
1370 | CCI400_R1_MASTER_PORT_MIN_EV, |
1371 | CCI400_R1_MASTER_PORT_MAX_EV, | |
fc17c839 SP |
1372 | }, |
1373 | }, | |
31216290 SP |
1374 | .validate_hw_event = cci400_validate_hw_event, |
1375 | .get_event_idx = cci400_get_event_idx, | |
fc17c839 | 1376 | }, |
f4d58938 | 1377 | #endif |
a95791ef SP |
1378 | #ifdef CONFIG_ARM_CCI500_PMU |
1379 | [CCI500_R0] = { | |
1380 | .name = "CCI_500", | |
1381 | .fixed_hw_cntrs = 0, | |
1382 | .num_hw_cntrs = 8, | |
1383 | .cntr_size = SZ_64K, | |
e14cfad3 SP |
1384 | .format_attrs = cci500_pmu_format_attrs, |
1385 | .nformat_attrs = ARRAY_SIZE(cci500_pmu_format_attrs), | |
1386 | .event_attrs = cci500_pmu_event_attrs, | |
1387 | .nevent_attrs = ARRAY_SIZE(cci500_pmu_event_attrs), | |
a95791ef SP |
1388 | .event_ranges = { |
1389 | [CCI_IF_SLAVE] = { | |
1390 | CCI500_SLAVE_PORT_MIN_EV, | |
1391 | CCI500_SLAVE_PORT_MAX_EV, | |
1392 | }, | |
1393 | [CCI_IF_MASTER] = { | |
1394 | CCI500_MASTER_PORT_MIN_EV, | |
1395 | CCI500_MASTER_PORT_MAX_EV, | |
1396 | }, | |
1397 | [CCI_IF_GLOBAL] = { | |
1398 | CCI500_GLOBAL_PORT_MIN_EV, | |
1399 | CCI500_GLOBAL_PORT_MAX_EV, | |
1400 | }, | |
1401 | }, | |
1402 | .validate_hw_event = cci500_validate_hw_event, | |
1403 | }, | |
1404 | #endif | |
fc17c839 SP |
1405 | }; |
1406 | ||
b91c8f28 | 1407 | static const struct of_device_id arm_cci_pmu_matches[] = { |
f4d58938 | 1408 | #ifdef CONFIG_ARM_CCI400_PMU |
b91c8f28 PA |
1409 | { |
1410 | .compatible = "arm,cci-400-pmu", | |
772742a6 SP |
1411 | .data = NULL, |
1412 | }, | |
1413 | { | |
1414 | .compatible = "arm,cci-400-pmu,r0", | |
f4d58938 | 1415 | .data = &cci_pmu_models[CCI400_R0], |
772742a6 SP |
1416 | }, |
1417 | { | |
1418 | .compatible = "arm,cci-400-pmu,r1", | |
f4d58938 | 1419 | .data = &cci_pmu_models[CCI400_R1], |
b91c8f28 | 1420 | }, |
a95791ef SP |
1421 | #endif |
1422 | #ifdef CONFIG_ARM_CCI500_PMU | |
1423 | { | |
1424 | .compatible = "arm,cci-500-pmu,r0", | |
1425 | .data = &cci_pmu_models[CCI500_R0], | |
1426 | }, | |
f4d58938 | 1427 | #endif |
b91c8f28 PA |
1428 | {}, |
1429 | }; | |
1430 | ||
fc17c839 SP |
1431 | static inline const struct cci_pmu_model *get_cci_model(struct platform_device *pdev) |
1432 | { | |
1433 | const struct of_device_id *match = of_match_node(arm_cci_pmu_matches, | |
1434 | pdev->dev.of_node); | |
1435 | if (!match) | |
1436 | return NULL; | |
772742a6 SP |
1437 | if (match->data) |
1438 | return match->data; | |
fc17c839 | 1439 | |
772742a6 SP |
1440 | dev_warn(&pdev->dev, "DEPRECATED compatible property," |
1441 | "requires secure access to CCI registers"); | |
fc17c839 SP |
1442 | return probe_cci_model(pdev); |
1443 | } | |
1444 | ||
f6b9e83c SP |
1445 | static bool is_duplicate_irq(int irq, int *irqs, int nr_irqs) |
1446 | { | |
1447 | int i; | |
1448 | ||
1449 | for (i = 0; i < nr_irqs; i++) | |
1450 | if (irq == irqs[i]) | |
1451 | return true; | |
1452 | ||
1453 | return false; | |
1454 | } | |
1455 | ||
ab5b316d | 1456 | static struct cci_pmu *cci_pmu_alloc(struct platform_device *pdev) |
b91c8f28 | 1457 | { |
a1a076d7 | 1458 | struct cci_pmu *cci_pmu; |
fc17c839 SP |
1459 | const struct cci_pmu_model *model; |
1460 | ||
ab5b316d SP |
1461 | /* |
1462 | * All allocations are devm_* hence we don't have to free | |
1463 | * them explicitly on an error, as it would end up in driver | |
1464 | * detach. | |
1465 | */ | |
fc17c839 SP |
1466 | model = get_cci_model(pdev); |
1467 | if (!model) { | |
1468 | dev_warn(&pdev->dev, "CCI PMU version not supported\n"); | |
ab5b316d | 1469 | return ERR_PTR(-ENODEV); |
fc17c839 | 1470 | } |
b91c8f28 | 1471 | |
a1a076d7 SP |
1472 | cci_pmu = devm_kzalloc(&pdev->dev, sizeof(*cci_pmu), GFP_KERNEL); |
1473 | if (!cci_pmu) | |
ab5b316d | 1474 | return ERR_PTR(-ENOMEM); |
b91c8f28 | 1475 | |
a1a076d7 | 1476 | cci_pmu->model = model; |
ab5b316d SP |
1477 | cci_pmu->irqs = devm_kcalloc(&pdev->dev, CCI_PMU_MAX_HW_CNTRS(model), |
1478 | sizeof(*cci_pmu->irqs), GFP_KERNEL); | |
1479 | if (!cci_pmu->irqs) | |
1480 | return ERR_PTR(-ENOMEM); | |
1481 | cci_pmu->hw_events.events = devm_kcalloc(&pdev->dev, | |
1482 | CCI_PMU_MAX_HW_CNTRS(model), | |
1483 | sizeof(*cci_pmu->hw_events.events), | |
1484 | GFP_KERNEL); | |
1485 | if (!cci_pmu->hw_events.events) | |
1486 | return ERR_PTR(-ENOMEM); | |
1487 | cci_pmu->hw_events.used_mask = devm_kcalloc(&pdev->dev, | |
1488 | BITS_TO_LONGS(CCI_PMU_MAX_HW_CNTRS(model)), | |
1489 | sizeof(*cci_pmu->hw_events.used_mask), | |
1490 | GFP_KERNEL); | |
1491 | if (!cci_pmu->hw_events.used_mask) | |
1492 | return ERR_PTR(-ENOMEM); | |
1493 | ||
1494 | return cci_pmu; | |
1495 | } | |
1496 | ||
1497 | ||
1498 | static int cci_pmu_probe(struct platform_device *pdev) | |
1499 | { | |
1500 | struct resource *res; | |
1501 | struct cci_pmu *cci_pmu; | |
1502 | int i, ret, irq; | |
1503 | ||
1504 | cci_pmu = cci_pmu_alloc(pdev); | |
1505 | if (IS_ERR(cci_pmu)) | |
1506 | return PTR_ERR(cci_pmu); | |
1507 | ||
b91c8f28 | 1508 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
a1a076d7 SP |
1509 | cci_pmu->base = devm_ioremap_resource(&pdev->dev, res); |
1510 | if (IS_ERR(cci_pmu->base)) | |
fee4f2c6 | 1511 | return -ENOMEM; |
b91c8f28 PA |
1512 | |
1513 | /* | |
ab5b316d | 1514 | * CCI PMU has one overflow interrupt per counter; but some may be tied |
b91c8f28 PA |
1515 | * together to a common interrupt. |
1516 | */ | |
a1a076d7 | 1517 | cci_pmu->nr_irqs = 0; |
ab5b316d | 1518 | for (i = 0; i < CCI_PMU_MAX_HW_CNTRS(cci_pmu->model); i++) { |
b91c8f28 PA |
1519 | irq = platform_get_irq(pdev, i); |
1520 | if (irq < 0) | |
1521 | break; | |
1522 | ||
a1a076d7 | 1523 | if (is_duplicate_irq(irq, cci_pmu->irqs, cci_pmu->nr_irqs)) |
b91c8f28 PA |
1524 | continue; |
1525 | ||
a1a076d7 | 1526 | cci_pmu->irqs[cci_pmu->nr_irqs++] = irq; |
b91c8f28 PA |
1527 | } |
1528 | ||
1529 | /* | |
1530 | * Ensure that the device tree has as many interrupts as the number | |
1531 | * of counters. | |
1532 | */ | |
ab5b316d | 1533 | if (i < CCI_PMU_MAX_HW_CNTRS(cci_pmu->model)) { |
b91c8f28 | 1534 | dev_warn(&pdev->dev, "In-correct number of interrupts: %d, should be %d\n", |
ab5b316d | 1535 | i, CCI_PMU_MAX_HW_CNTRS(cci_pmu->model)); |
fee4f2c6 | 1536 | return -EINVAL; |
b91c8f28 PA |
1537 | } |
1538 | ||
a1a076d7 SP |
1539 | raw_spin_lock_init(&cci_pmu->hw_events.pmu_lock); |
1540 | mutex_init(&cci_pmu->reserve_mutex); | |
1541 | atomic_set(&cci_pmu->active_events, 0); | |
1542 | cpumask_set_cpu(smp_processor_id(), &cci_pmu->cpus); | |
c6f85cb4 | 1543 | |
a1a076d7 SP |
1544 | cci_pmu->cpu_nb = (struct notifier_block) { |
1545 | .notifier_call = cci_pmu_cpu_notifier, | |
1546 | /* | |
1547 | * to migrate uncore events, our notifier should be executed | |
1548 | * before perf core's notifier. | |
1549 | */ | |
1550 | .priority = CPU_PRI_PERF + 1, | |
1551 | }; | |
1552 | ||
1553 | ret = register_cpu_notifier(&cci_pmu->cpu_nb); | |
c6f85cb4 MR |
1554 | if (ret) |
1555 | return ret; | |
b91c8f28 | 1556 | |
a1a076d7 SP |
1557 | ret = cci_pmu_init(cci_pmu, pdev); |
1558 | if (ret) { | |
1559 | unregister_cpu_notifier(&cci_pmu->cpu_nb); | |
fee4f2c6 | 1560 | return ret; |
a1a076d7 | 1561 | } |
b91c8f28 | 1562 | |
a1a076d7 | 1563 | pr_info("ARM %s PMU driver probed", cci_pmu->model->name); |
b91c8f28 | 1564 | return 0; |
b91c8f28 PA |
1565 | } |
1566 | ||
1567 | static int cci_platform_probe(struct platform_device *pdev) | |
1568 | { | |
1569 | if (!cci_probed()) | |
1570 | return -ENODEV; | |
1571 | ||
1572 | return of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev); | |
1573 | } | |
1574 | ||
f6b9e83c SP |
1575 | static struct platform_driver cci_pmu_driver = { |
1576 | .driver = { | |
1577 | .name = DRIVER_NAME_PMU, | |
1578 | .of_match_table = arm_cci_pmu_matches, | |
1579 | }, | |
1580 | .probe = cci_pmu_probe, | |
1581 | }; | |
1582 | ||
1583 | static struct platform_driver cci_platform_driver = { | |
1584 | .driver = { | |
1585 | .name = DRIVER_NAME, | |
1586 | .of_match_table = arm_cci_matches, | |
1587 | }, | |
1588 | .probe = cci_platform_probe, | |
1589 | }; | |
1590 | ||
1591 | static int __init cci_platform_init(void) | |
1592 | { | |
1593 | int ret; | |
1594 | ||
1595 | ret = platform_driver_register(&cci_pmu_driver); | |
1596 | if (ret) | |
1597 | return ret; | |
1598 | ||
1599 | return platform_driver_register(&cci_platform_driver); | |
1600 | } | |
1601 | ||
f4d58938 | 1602 | #else /* !CONFIG_ARM_CCI_PMU */ |
f6b9e83c SP |
1603 | |
1604 | static int __init cci_platform_init(void) | |
1605 | { | |
1606 | return 0; | |
1607 | } | |
1608 | ||
f4d58938 | 1609 | #endif /* CONFIG_ARM_CCI_PMU */ |
ee8e5d5f SP |
1610 | |
1611 | #ifdef CONFIG_ARM_CCI400_PORT_CTRL | |
b91c8f28 | 1612 | |
f6b9e83c SP |
1613 | #define CCI_PORT_CTRL 0x0 |
1614 | #define CCI_CTRL_STATUS 0xc | |
1615 | ||
1616 | #define CCI_ENABLE_SNOOP_REQ 0x1 | |
1617 | #define CCI_ENABLE_DVM_REQ 0x2 | |
1618 | #define CCI_ENABLE_REQ (CCI_ENABLE_SNOOP_REQ | CCI_ENABLE_DVM_REQ) | |
1619 | ||
1620 | enum cci_ace_port_type { | |
1621 | ACE_INVALID_PORT = 0x0, | |
1622 | ACE_PORT, | |
1623 | ACE_LITE_PORT, | |
1624 | }; | |
1625 | ||
1626 | struct cci_ace_port { | |
1627 | void __iomem *base; | |
1628 | unsigned long phys; | |
1629 | enum cci_ace_port_type type; | |
1630 | struct device_node *dn; | |
1631 | }; | |
1632 | ||
1633 | static struct cci_ace_port *ports; | |
1634 | static unsigned int nb_cci_ports; | |
1635 | ||
ed69bdd8 LP |
1636 | struct cpu_port { |
1637 | u64 mpidr; | |
1638 | u32 port; | |
1639 | }; | |
62158f81 | 1640 | |
ed69bdd8 LP |
1641 | /* |
1642 | * Use the port MSB as valid flag, shift can be made dynamic | |
1643 | * by computing number of bits required for port indexes. | |
1644 | * Code disabling CCI cpu ports runs with D-cache invalidated | |
1645 | * and SCTLR bit clear so data accesses must be kept to a minimum | |
1646 | * to improve performance; for now shift is left static to | |
1647 | * avoid one more data access while disabling the CCI port. | |
1648 | */ | |
1649 | #define PORT_VALID_SHIFT 31 | |
1650 | #define PORT_VALID (0x1 << PORT_VALID_SHIFT) | |
1651 | ||
1652 | static inline void init_cpu_port(struct cpu_port *port, u32 index, u64 mpidr) | |
1653 | { | |
1654 | port->port = PORT_VALID | index; | |
1655 | port->mpidr = mpidr; | |
1656 | } | |
1657 | ||
1658 | static inline bool cpu_port_is_valid(struct cpu_port *port) | |
1659 | { | |
1660 | return !!(port->port & PORT_VALID); | |
1661 | } | |
1662 | ||
1663 | static inline bool cpu_port_match(struct cpu_port *port, u64 mpidr) | |
1664 | { | |
1665 | return port->mpidr == (mpidr & MPIDR_HWID_BITMASK); | |
1666 | } | |
1667 | ||
1668 | static struct cpu_port cpu_port[NR_CPUS]; | |
1669 | ||
1670 | /** | |
1671 | * __cci_ace_get_port - Function to retrieve the port index connected to | |
1672 | * a cpu or device. | |
1673 | * | |
1674 | * @dn: device node of the device to look-up | |
1675 | * @type: port type | |
1676 | * | |
1677 | * Return value: | |
1678 | * - CCI port index if success | |
1679 | * - -ENODEV if failure | |
1680 | */ | |
1681 | static int __cci_ace_get_port(struct device_node *dn, int type) | |
1682 | { | |
1683 | int i; | |
1684 | bool ace_match; | |
1685 | struct device_node *cci_portn; | |
1686 | ||
1687 | cci_portn = of_parse_phandle(dn, "cci-control-port", 0); | |
1688 | for (i = 0; i < nb_cci_ports; i++) { | |
1689 | ace_match = ports[i].type == type; | |
1690 | if (ace_match && cci_portn == ports[i].dn) | |
1691 | return i; | |
1692 | } | |
1693 | return -ENODEV; | |
1694 | } | |
1695 | ||
1696 | int cci_ace_get_port(struct device_node *dn) | |
1697 | { | |
1698 | return __cci_ace_get_port(dn, ACE_LITE_PORT); | |
1699 | } | |
1700 | EXPORT_SYMBOL_GPL(cci_ace_get_port); | |
1701 | ||
b91c8f28 | 1702 | static void cci_ace_init_ports(void) |
ed69bdd8 | 1703 | { |
78b4d6e0 SK |
1704 | int port, cpu; |
1705 | struct device_node *cpun; | |
ed69bdd8 LP |
1706 | |
1707 | /* | |
1708 | * Port index look-up speeds up the function disabling ports by CPU, | |
1709 | * since the logical to port index mapping is done once and does | |
1710 | * not change after system boot. | |
1711 | * The stashed index array is initialized for all possible CPUs | |
1712 | * at probe time. | |
1713 | */ | |
78b4d6e0 SK |
1714 | for_each_possible_cpu(cpu) { |
1715 | /* too early to use cpu->of_node */ | |
1716 | cpun = of_get_cpu_node(cpu, NULL); | |
ed69bdd8 | 1717 | |
78b4d6e0 | 1718 | if (WARN(!cpun, "Missing cpu device node\n")) |
ed69bdd8 | 1719 | continue; |
78b4d6e0 | 1720 | |
ed69bdd8 LP |
1721 | port = __cci_ace_get_port(cpun, ACE_PORT); |
1722 | if (port < 0) | |
1723 | continue; | |
1724 | ||
1725 | init_cpu_port(&cpu_port[cpu], port, cpu_logical_map(cpu)); | |
1726 | } | |
1727 | ||
1728 | for_each_possible_cpu(cpu) { | |
1729 | WARN(!cpu_port_is_valid(&cpu_port[cpu]), | |
1730 | "CPU %u does not have an associated CCI port\n", | |
1731 | cpu); | |
1732 | } | |
1733 | } | |
1734 | /* | |
1735 | * Functions to enable/disable a CCI interconnect slave port | |
1736 | * | |
1737 | * They are called by low-level power management code to disable slave | |
1738 | * interfaces snoops and DVM broadcast. | |
1739 | * Since they may execute with cache data allocation disabled and | |
1740 | * after the caches have been cleaned and invalidated the functions provide | |
1741 | * no explicit locking since they may run with D-cache disabled, so normal | |
1742 | * cacheable kernel locks based on ldrex/strex may not work. | |
1743 | * Locking has to be provided by BSP implementations to ensure proper | |
1744 | * operations. | |
1745 | */ | |
1746 | ||
1747 | /** | |
1748 | * cci_port_control() - function to control a CCI port | |
1749 | * | |
1750 | * @port: index of the port to setup | |
1751 | * @enable: if true enables the port, if false disables it | |
1752 | */ | |
1753 | static void notrace cci_port_control(unsigned int port, bool enable) | |
1754 | { | |
1755 | void __iomem *base = ports[port].base; | |
1756 | ||
1757 | writel_relaxed(enable ? CCI_ENABLE_REQ : 0, base + CCI_PORT_CTRL); | |
1758 | /* | |
1759 | * This function is called from power down procedures | |
1760 | * and must not execute any instruction that might | |
1761 | * cause the processor to be put in a quiescent state | |
1762 | * (eg wfi). Hence, cpu_relax() can not be added to this | |
1763 | * read loop to optimize power, since it might hide possibly | |
1764 | * disruptive operations. | |
1765 | */ | |
1766 | while (readl_relaxed(cci_ctrl_base + CCI_CTRL_STATUS) & 0x1) | |
1767 | ; | |
1768 | } | |
1769 | ||
1770 | /** | |
1771 | * cci_disable_port_by_cpu() - function to disable a CCI port by CPU | |
1772 | * reference | |
1773 | * | |
1774 | * @mpidr: mpidr of the CPU whose CCI port should be disabled | |
1775 | * | |
1776 | * Disabling a CCI port for a CPU implies disabling the CCI port | |
1777 | * controlling that CPU cluster. Code disabling CPU CCI ports | |
1778 | * must make sure that the CPU running the code is the last active CPU | |
1779 | * in the cluster ie all other CPUs are quiescent in a low power state. | |
1780 | * | |
1781 | * Return: | |
1782 | * 0 on success | |
1783 | * -ENODEV on port look-up failure | |
1784 | */ | |
1785 | int notrace cci_disable_port_by_cpu(u64 mpidr) | |
1786 | { | |
1787 | int cpu; | |
1788 | bool is_valid; | |
1789 | for (cpu = 0; cpu < nr_cpu_ids; cpu++) { | |
1790 | is_valid = cpu_port_is_valid(&cpu_port[cpu]); | |
1791 | if (is_valid && cpu_port_match(&cpu_port[cpu], mpidr)) { | |
1792 | cci_port_control(cpu_port[cpu].port, false); | |
1793 | return 0; | |
1794 | } | |
1795 | } | |
1796 | return -ENODEV; | |
1797 | } | |
1798 | EXPORT_SYMBOL_GPL(cci_disable_port_by_cpu); | |
1799 | ||
62158f81 NP |
1800 | /** |
1801 | * cci_enable_port_for_self() - enable a CCI port for calling CPU | |
1802 | * | |
1803 | * Enabling a CCI port for the calling CPU implies enabling the CCI | |
1804 | * port controlling that CPU's cluster. Caller must make sure that the | |
1805 | * CPU running the code is the first active CPU in the cluster and all | |
1806 | * other CPUs are quiescent in a low power state or waiting for this CPU | |
1807 | * to complete the CCI initialization. | |
1808 | * | |
1809 | * Because this is called when the MMU is still off and with no stack, | |
1810 | * the code must be position independent and ideally rely on callee | |
1811 | * clobbered registers only. To achieve this we must code this function | |
1812 | * entirely in assembler. | |
1813 | * | |
1814 | * On success this returns with the proper CCI port enabled. In case of | |
1815 | * any failure this never returns as the inability to enable the CCI is | |
1816 | * fatal and there is no possible recovery at this stage. | |
1817 | */ | |
1818 | asmlinkage void __naked cci_enable_port_for_self(void) | |
1819 | { | |
1820 | asm volatile ("\n" | |
f4902492 | 1821 | " .arch armv7-a\n" |
62158f81 NP |
1822 | " mrc p15, 0, r0, c0, c0, 5 @ get MPIDR value \n" |
1823 | " and r0, r0, #"__stringify(MPIDR_HWID_BITMASK)" \n" | |
1824 | " adr r1, 5f \n" | |
1825 | " ldr r2, [r1] \n" | |
1826 | " add r1, r1, r2 @ &cpu_port \n" | |
1827 | " add ip, r1, %[sizeof_cpu_port] \n" | |
1828 | ||
1829 | /* Loop over the cpu_port array looking for a matching MPIDR */ | |
1830 | "1: ldr r2, [r1, %[offsetof_cpu_port_mpidr_lsb]] \n" | |
1831 | " cmp r2, r0 @ compare MPIDR \n" | |
1832 | " bne 2f \n" | |
1833 | ||
1834 | /* Found a match, now test port validity */ | |
1835 | " ldr r3, [r1, %[offsetof_cpu_port_port]] \n" | |
1836 | " tst r3, #"__stringify(PORT_VALID)" \n" | |
1837 | " bne 3f \n" | |
1838 | ||
1839 | /* no match, loop with the next cpu_port entry */ | |
1840 | "2: add r1, r1, %[sizeof_struct_cpu_port] \n" | |
1841 | " cmp r1, ip @ done? \n" | |
1842 | " blo 1b \n" | |
1843 | ||
1844 | /* CCI port not found -- cheaply try to stall this CPU */ | |
1845 | "cci_port_not_found: \n" | |
1846 | " wfi \n" | |
1847 | " wfe \n" | |
1848 | " b cci_port_not_found \n" | |
1849 | ||
1850 | /* Use matched port index to look up the corresponding ports entry */ | |
1851 | "3: bic r3, r3, #"__stringify(PORT_VALID)" \n" | |
1852 | " adr r0, 6f \n" | |
1853 | " ldmia r0, {r1, r2} \n" | |
1854 | " sub r1, r1, r0 @ virt - phys \n" | |
1855 | " ldr r0, [r0, r2] @ *(&ports) \n" | |
1856 | " mov r2, %[sizeof_struct_ace_port] \n" | |
1857 | " mla r0, r2, r3, r0 @ &ports[index] \n" | |
1858 | " sub r0, r0, r1 @ virt_to_phys() \n" | |
1859 | ||
1860 | /* Enable the CCI port */ | |
1861 | " ldr r0, [r0, %[offsetof_port_phys]] \n" | |
fdb07aee | 1862 | " mov r3, %[cci_enable_req]\n" |
62158f81 NP |
1863 | " str r3, [r0, #"__stringify(CCI_PORT_CTRL)"] \n" |
1864 | ||
1865 | /* poll the status reg for completion */ | |
1866 | " adr r1, 7f \n" | |
1867 | " ldr r0, [r1] \n" | |
1868 | " ldr r0, [r0, r1] @ cci_ctrl_base \n" | |
1869 | "4: ldr r1, [r0, #"__stringify(CCI_CTRL_STATUS)"] \n" | |
fdb07aee | 1870 | " tst r1, %[cci_control_status_bits] \n" |
62158f81 NP |
1871 | " bne 4b \n" |
1872 | ||
1873 | " mov r0, #0 \n" | |
1874 | " bx lr \n" | |
1875 | ||
1876 | " .align 2 \n" | |
1877 | "5: .word cpu_port - . \n" | |
1878 | "6: .word . \n" | |
1879 | " .word ports - 6b \n" | |
1880 | "7: .word cci_ctrl_phys - . \n" | |
1881 | : : | |
1882 | [sizeof_cpu_port] "i" (sizeof(cpu_port)), | |
fdb07aee VK |
1883 | [cci_enable_req] "i" cpu_to_le32(CCI_ENABLE_REQ), |
1884 | [cci_control_status_bits] "i" cpu_to_le32(1), | |
62158f81 NP |
1885 | #ifndef __ARMEB__ |
1886 | [offsetof_cpu_port_mpidr_lsb] "i" (offsetof(struct cpu_port, mpidr)), | |
1887 | #else | |
1888 | [offsetof_cpu_port_mpidr_lsb] "i" (offsetof(struct cpu_port, mpidr)+4), | |
1889 | #endif | |
1890 | [offsetof_cpu_port_port] "i" (offsetof(struct cpu_port, port)), | |
1891 | [sizeof_struct_cpu_port] "i" (sizeof(struct cpu_port)), | |
1892 | [sizeof_struct_ace_port] "i" (sizeof(struct cci_ace_port)), | |
1893 | [offsetof_port_phys] "i" (offsetof(struct cci_ace_port, phys)) ); | |
1894 | ||
1895 | unreachable(); | |
1896 | } | |
1897 | ||
ed69bdd8 LP |
1898 | /** |
1899 | * __cci_control_port_by_device() - function to control a CCI port by device | |
1900 | * reference | |
1901 | * | |
1902 | * @dn: device node pointer of the device whose CCI port should be | |
1903 | * controlled | |
1904 | * @enable: if true enables the port, if false disables it | |
1905 | * | |
1906 | * Return: | |
1907 | * 0 on success | |
1908 | * -ENODEV on port look-up failure | |
1909 | */ | |
1910 | int notrace __cci_control_port_by_device(struct device_node *dn, bool enable) | |
1911 | { | |
1912 | int port; | |
1913 | ||
1914 | if (!dn) | |
1915 | return -ENODEV; | |
1916 | ||
1917 | port = __cci_ace_get_port(dn, ACE_LITE_PORT); | |
1918 | if (WARN_ONCE(port < 0, "node %s ACE lite port look-up failure\n", | |
1919 | dn->full_name)) | |
1920 | return -ENODEV; | |
1921 | cci_port_control(port, enable); | |
1922 | return 0; | |
1923 | } | |
1924 | EXPORT_SYMBOL_GPL(__cci_control_port_by_device); | |
1925 | ||
1926 | /** | |
1927 | * __cci_control_port_by_index() - function to control a CCI port by port index | |
1928 | * | |
1929 | * @port: port index previously retrieved with cci_ace_get_port() | |
1930 | * @enable: if true enables the port, if false disables it | |
1931 | * | |
1932 | * Return: | |
1933 | * 0 on success | |
1934 | * -ENODEV on port index out of range | |
1935 | * -EPERM if operation carried out on an ACE PORT | |
1936 | */ | |
1937 | int notrace __cci_control_port_by_index(u32 port, bool enable) | |
1938 | { | |
1939 | if (port >= nb_cci_ports || ports[port].type == ACE_INVALID_PORT) | |
1940 | return -ENODEV; | |
1941 | /* | |
1942 | * CCI control for ports connected to CPUS is extremely fragile | |
1943 | * and must be made to go through a specific and controlled | |
1944 | * interface (ie cci_disable_port_by_cpu(); control by general purpose | |
1945 | * indexing is therefore disabled for ACE ports. | |
1946 | */ | |
1947 | if (ports[port].type == ACE_PORT) | |
1948 | return -EPERM; | |
1949 | ||
1950 | cci_port_control(port, enable); | |
1951 | return 0; | |
1952 | } | |
1953 | EXPORT_SYMBOL_GPL(__cci_control_port_by_index); | |
1954 | ||
ed69bdd8 LP |
1955 | static const struct of_device_id arm_cci_ctrl_if_matches[] = { |
1956 | {.compatible = "arm,cci-400-ctrl-if", }, | |
1957 | {}, | |
1958 | }; | |
1959 | ||
f6b9e83c | 1960 | static int cci_probe_ports(struct device_node *np) |
ed69bdd8 LP |
1961 | { |
1962 | struct cci_nb_ports const *cci_config; | |
1963 | int ret, i, nb_ace = 0, nb_ace_lite = 0; | |
f6b9e83c | 1964 | struct device_node *cp; |
62158f81 | 1965 | struct resource res; |
ed69bdd8 LP |
1966 | const char *match_str; |
1967 | bool is_ace; | |
1968 | ||
896ddd60 | 1969 | |
ed69bdd8 LP |
1970 | cci_config = of_match_node(arm_cci_matches, np)->data; |
1971 | if (!cci_config) | |
1972 | return -ENODEV; | |
1973 | ||
1974 | nb_cci_ports = cci_config->nb_ace + cci_config->nb_ace_lite; | |
1975 | ||
7c762036 | 1976 | ports = kcalloc(nb_cci_ports, sizeof(*ports), GFP_KERNEL); |
ed69bdd8 LP |
1977 | if (!ports) |
1978 | return -ENOMEM; | |
1979 | ||
ed69bdd8 LP |
1980 | for_each_child_of_node(np, cp) { |
1981 | if (!of_match_node(arm_cci_ctrl_if_matches, cp)) | |
1982 | continue; | |
1983 | ||
1984 | i = nb_ace + nb_ace_lite; | |
1985 | ||
1986 | if (i >= nb_cci_ports) | |
1987 | break; | |
1988 | ||
1989 | if (of_property_read_string(cp, "interface-type", | |
1990 | &match_str)) { | |
1991 | WARN(1, "node %s missing interface-type property\n", | |
1992 | cp->full_name); | |
1993 | continue; | |
1994 | } | |
1995 | is_ace = strcmp(match_str, "ace") == 0; | |
1996 | if (!is_ace && strcmp(match_str, "ace-lite")) { | |
1997 | WARN(1, "node %s containing invalid interface-type property, skipping it\n", | |
1998 | cp->full_name); | |
1999 | continue; | |
2000 | } | |
2001 | ||
62158f81 NP |
2002 | ret = of_address_to_resource(cp, 0, &res); |
2003 | if (!ret) { | |
2004 | ports[i].base = ioremap(res.start, resource_size(&res)); | |
2005 | ports[i].phys = res.start; | |
2006 | } | |
2007 | if (ret || !ports[i].base) { | |
ed69bdd8 LP |
2008 | WARN(1, "unable to ioremap CCI port %d\n", i); |
2009 | continue; | |
2010 | } | |
2011 | ||
2012 | if (is_ace) { | |
2013 | if (WARN_ON(nb_ace >= cci_config->nb_ace)) | |
2014 | continue; | |
2015 | ports[i].type = ACE_PORT; | |
2016 | ++nb_ace; | |
2017 | } else { | |
2018 | if (WARN_ON(nb_ace_lite >= cci_config->nb_ace_lite)) | |
2019 | continue; | |
2020 | ports[i].type = ACE_LITE_PORT; | |
2021 | ++nb_ace_lite; | |
2022 | } | |
2023 | ports[i].dn = cp; | |
2024 | } | |
2025 | ||
2026 | /* initialize a stashed array of ACE ports to speed-up look-up */ | |
2027 | cci_ace_init_ports(); | |
2028 | ||
2029 | /* | |
2030 | * Multi-cluster systems may need this data when non-coherent, during | |
2031 | * cluster power-up/power-down. Make sure it reaches main memory. | |
2032 | */ | |
2033 | sync_cache_w(&cci_ctrl_base); | |
62158f81 | 2034 | sync_cache_w(&cci_ctrl_phys); |
ed69bdd8 LP |
2035 | sync_cache_w(&ports); |
2036 | sync_cache_w(&cpu_port); | |
2037 | __sync_cache_range_w(ports, sizeof(*ports) * nb_cci_ports); | |
2038 | pr_info("ARM CCI driver probed\n"); | |
f6b9e83c | 2039 | |
ed69bdd8 | 2040 | return 0; |
f6b9e83c | 2041 | } |
ee8e5d5f SP |
2042 | #else /* !CONFIG_ARM_CCI400_PORT_CTRL */ |
2043 | static inline int cci_probe_ports(struct device_node *np) | |
2044 | { | |
2045 | return 0; | |
2046 | } | |
2047 | #endif /* CONFIG_ARM_CCI400_PORT_CTRL */ | |
ed69bdd8 | 2048 | |
f6b9e83c SP |
2049 | static int cci_probe(void) |
2050 | { | |
2051 | int ret; | |
2052 | struct device_node *np; | |
2053 | struct resource res; | |
ed69bdd8 | 2054 | |
f6b9e83c SP |
2055 | np = of_find_matching_node(NULL, arm_cci_matches); |
2056 | if(!np || !of_device_is_available(np)) | |
2057 | return -ENODEV; | |
2058 | ||
2059 | ret = of_address_to_resource(np, 0, &res); | |
2060 | if (!ret) { | |
2061 | cci_ctrl_base = ioremap(res.start, resource_size(&res)); | |
2062 | cci_ctrl_phys = res.start; | |
2063 | } | |
2064 | if (ret || !cci_ctrl_base) { | |
2065 | WARN(1, "unable to ioremap CCI ctrl\n"); | |
2066 | return -ENXIO; | |
2067 | } | |
2068 | ||
2069 | return cci_probe_ports(np); | |
ed69bdd8 LP |
2070 | } |
2071 | ||
2072 | static int cci_init_status = -EAGAIN; | |
2073 | static DEFINE_MUTEX(cci_probing); | |
2074 | ||
b91c8f28 | 2075 | static int cci_init(void) |
ed69bdd8 LP |
2076 | { |
2077 | if (cci_init_status != -EAGAIN) | |
2078 | return cci_init_status; | |
2079 | ||
2080 | mutex_lock(&cci_probing); | |
2081 | if (cci_init_status == -EAGAIN) | |
2082 | cci_init_status = cci_probe(); | |
2083 | mutex_unlock(&cci_probing); | |
2084 | return cci_init_status; | |
2085 | } | |
2086 | ||
2087 | /* | |
2088 | * To sort out early init calls ordering a helper function is provided to | |
2089 | * check if the CCI driver has beed initialized. Function check if the driver | |
2090 | * has been initialized, if not it calls the init function that probes | |
2091 | * the driver and updates the return value. | |
2092 | */ | |
b91c8f28 | 2093 | bool cci_probed(void) |
ed69bdd8 LP |
2094 | { |
2095 | return cci_init() == 0; | |
2096 | } | |
2097 | EXPORT_SYMBOL_GPL(cci_probed); | |
2098 | ||
2099 | early_initcall(cci_init); | |
b91c8f28 | 2100 | core_initcall(cci_platform_init); |
ed69bdd8 LP |
2101 | MODULE_LICENSE("GPL"); |
2102 | MODULE_DESCRIPTION("ARM CCI support"); |