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8404b0fb QL |
1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* | |
3 | * This driver adds support for PCIe PMU RCiEP device. Related | |
4 | * perf events are bandwidth, latency etc. | |
5 | * | |
6 | * Copyright (C) 2021 HiSilicon Limited | |
7 | * Author: Qi Liu <liuqi115@huawei.com> | |
8 | */ | |
9 | #include <linux/bitfield.h> | |
10 | #include <linux/bitmap.h> | |
11 | #include <linux/bug.h> | |
12 | #include <linux/device.h> | |
13 | #include <linux/err.h> | |
14 | #include <linux/interrupt.h> | |
15 | #include <linux/irq.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/list.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/pci.h> | |
20 | #include <linux/perf_event.h> | |
21 | ||
22 | #define DRV_NAME "hisi_pcie_pmu" | |
23 | /* Define registers */ | |
24 | #define HISI_PCIE_GLOBAL_CTRL 0x00 | |
25 | #define HISI_PCIE_EVENT_CTRL 0x010 | |
26 | #define HISI_PCIE_CNT 0x090 | |
27 | #define HISI_PCIE_EXT_CNT 0x110 | |
28 | #define HISI_PCIE_INT_STAT 0x150 | |
29 | #define HISI_PCIE_INT_MASK 0x154 | |
30 | #define HISI_PCIE_REG_BDF 0xfe0 | |
31 | #define HISI_PCIE_REG_VERSION 0xfe4 | |
32 | #define HISI_PCIE_REG_INFO 0xfe8 | |
33 | ||
34 | /* Define command in HISI_PCIE_GLOBAL_CTRL */ | |
35 | #define HISI_PCIE_GLOBAL_EN 0x01 | |
36 | #define HISI_PCIE_GLOBAL_NONE 0 | |
37 | ||
38 | /* Define command in HISI_PCIE_EVENT_CTRL */ | |
39 | #define HISI_PCIE_EVENT_EN BIT_ULL(20) | |
40 | #define HISI_PCIE_RESET_CNT BIT_ULL(22) | |
41 | #define HISI_PCIE_INIT_SET BIT_ULL(34) | |
42 | #define HISI_PCIE_THR_EN BIT_ULL(26) | |
43 | #define HISI_PCIE_TARGET_EN BIT_ULL(32) | |
44 | #define HISI_PCIE_TRIG_EN BIT_ULL(52) | |
45 | ||
46 | /* Define offsets in HISI_PCIE_EVENT_CTRL */ | |
47 | #define HISI_PCIE_EVENT_M GENMASK_ULL(15, 0) | |
48 | #define HISI_PCIE_THR_MODE_M GENMASK_ULL(27, 27) | |
49 | #define HISI_PCIE_THR_M GENMASK_ULL(31, 28) | |
17d57398 | 50 | #define HISI_PCIE_LEN_M GENMASK_ULL(35, 34) |
8404b0fb QL |
51 | #define HISI_PCIE_TARGET_M GENMASK_ULL(52, 36) |
52 | #define HISI_PCIE_TRIG_MODE_M GENMASK_ULL(53, 53) | |
53 | #define HISI_PCIE_TRIG_M GENMASK_ULL(59, 56) | |
54 | ||
17d57398 YY |
55 | /* Default config of TLP length mode, will count both TLP headers and payloads */ |
56 | #define HISI_PCIE_LEN_M_DEFAULT 3ULL | |
57 | ||
8404b0fb QL |
58 | #define HISI_PCIE_MAX_COUNTERS 8 |
59 | #define HISI_PCIE_REG_STEP 8 | |
60 | #define HISI_PCIE_THR_MAX_VAL 10 | |
61 | #define HISI_PCIE_TRIG_MAX_VAL 10 | |
62 | #define HISI_PCIE_MAX_PERIOD (GENMASK_ULL(63, 0)) | |
63 | #define HISI_PCIE_INIT_VAL BIT_ULL(63) | |
64 | ||
65 | struct hisi_pcie_pmu { | |
66 | struct perf_event *hw_events[HISI_PCIE_MAX_COUNTERS]; | |
67 | struct hlist_node node; | |
68 | struct pci_dev *pdev; | |
69 | struct pmu pmu; | |
70 | void __iomem *base; | |
71 | int irq; | |
72 | u32 identifier; | |
73 | /* Minimum and maximum BDF of root ports monitored by PMU */ | |
74 | u16 bdf_min; | |
75 | u16 bdf_max; | |
76 | int on_cpu; | |
77 | }; | |
78 | ||
79 | struct hisi_pcie_reg_pair { | |
80 | u16 lo; | |
81 | u16 hi; | |
82 | }; | |
83 | ||
84 | #define to_pcie_pmu(p) (container_of((p), struct hisi_pcie_pmu, pmu)) | |
85 | #define GET_PCI_DEVFN(bdf) ((bdf) & 0xff) | |
86 | ||
87 | #define HISI_PCIE_PMU_FILTER_ATTR(_name, _config, _hi, _lo) \ | |
88 | static u64 hisi_pcie_get_##_name(struct perf_event *event) \ | |
89 | { \ | |
90 | return FIELD_GET(GENMASK(_hi, _lo), event->attr._config); \ | |
91 | } \ | |
92 | ||
93 | HISI_PCIE_PMU_FILTER_ATTR(event, config, 16, 0); | |
94 | HISI_PCIE_PMU_FILTER_ATTR(thr_len, config1, 3, 0); | |
95 | HISI_PCIE_PMU_FILTER_ATTR(thr_mode, config1, 4, 4); | |
96 | HISI_PCIE_PMU_FILTER_ATTR(trig_len, config1, 8, 5); | |
97 | HISI_PCIE_PMU_FILTER_ATTR(trig_mode, config1, 9, 9); | |
17d57398 | 98 | HISI_PCIE_PMU_FILTER_ATTR(len_mode, config1, 11, 10); |
8404b0fb QL |
99 | HISI_PCIE_PMU_FILTER_ATTR(port, config2, 15, 0); |
100 | HISI_PCIE_PMU_FILTER_ATTR(bdf, config2, 31, 16); | |
101 | ||
8404b0fb QL |
102 | static ssize_t hisi_pcie_event_sysfs_show(struct device *dev, struct device_attribute *attr, |
103 | char *buf) | |
104 | { | |
105 | struct perf_pmu_events_attr *pmu_attr = | |
106 | container_of(attr, struct perf_pmu_events_attr, attr); | |
107 | ||
108 | return sysfs_emit(buf, "config=0x%llx\n", pmu_attr->id); | |
109 | } | |
110 | ||
111 | #define HISI_PCIE_PMU_FORMAT_ATTR(_name, _format) \ | |
112 | (&((struct dev_ext_attribute[]){ \ | |
b91b73a4 | 113 | { .attr = __ATTR(_name, 0444, device_show_string, NULL), \ |
8404b0fb QL |
114 | .var = (void *)_format } \ |
115 | })[0].attr.attr) | |
116 | ||
117 | #define HISI_PCIE_PMU_EVENT_ATTR(_name, _id) \ | |
118 | PMU_EVENT_ATTR_ID(_name, hisi_pcie_event_sysfs_show, _id) | |
119 | ||
120 | static ssize_t cpumask_show(struct device *dev, struct device_attribute *attr, char *buf) | |
121 | { | |
122 | struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(dev_get_drvdata(dev)); | |
123 | ||
124 | return cpumap_print_to_pagebuf(true, buf, cpumask_of(pcie_pmu->on_cpu)); | |
125 | } | |
126 | static DEVICE_ATTR_RO(cpumask); | |
127 | ||
128 | static ssize_t identifier_show(struct device *dev, struct device_attribute *attr, char *buf) | |
129 | { | |
130 | struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(dev_get_drvdata(dev)); | |
131 | ||
132 | return sysfs_emit(buf, "%#x\n", pcie_pmu->identifier); | |
133 | } | |
134 | static DEVICE_ATTR_RO(identifier); | |
135 | ||
136 | static ssize_t bus_show(struct device *dev, struct device_attribute *attr, char *buf) | |
137 | { | |
138 | struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(dev_get_drvdata(dev)); | |
139 | ||
140 | return sysfs_emit(buf, "%#04x\n", PCI_BUS_NUM(pcie_pmu->bdf_min)); | |
141 | } | |
142 | static DEVICE_ATTR_RO(bus); | |
143 | ||
144 | static struct hisi_pcie_reg_pair | |
145 | hisi_pcie_parse_reg_value(struct hisi_pcie_pmu *pcie_pmu, u32 reg_off) | |
146 | { | |
147 | u32 val = readl_relaxed(pcie_pmu->base + reg_off); | |
148 | struct hisi_pcie_reg_pair regs = { | |
149 | .lo = val, | |
150 | .hi = val >> 16, | |
151 | }; | |
152 | ||
153 | return regs; | |
154 | } | |
155 | ||
156 | /* | |
157 | * Hardware counter and ext_counter work together for bandwidth, latency, bus | |
158 | * utilization and buffer occupancy events. For example, RX memory write latency | |
159 | * events(index = 0x0010), counter counts total delay cycles and ext_counter | |
160 | * counts RX memory write PCIe packets number. | |
161 | * | |
162 | * As we don't want PMU driver to process these two data, "delay cycles" can | |
163 | * be treated as an independent event(index = 0x0010), "RX memory write packets | |
164 | * number" as another(index = 0x10010). BIT 16 is used to distinguish and 0-15 | |
165 | * bits are "real" event index, which can be used to set HISI_PCIE_EVENT_CTRL. | |
166 | */ | |
167 | #define EXT_COUNTER_IS_USED(idx) ((idx) & BIT(16)) | |
168 | ||
169 | static u32 hisi_pcie_get_real_event(struct perf_event *event) | |
170 | { | |
171 | return hisi_pcie_get_event(event) & GENMASK(15, 0); | |
172 | } | |
173 | ||
174 | static u32 hisi_pcie_pmu_get_offset(u32 offset, u32 idx) | |
175 | { | |
176 | return offset + HISI_PCIE_REG_STEP * idx; | |
177 | } | |
178 | ||
179 | static u32 hisi_pcie_pmu_readl(struct hisi_pcie_pmu *pcie_pmu, u32 reg_offset, | |
180 | u32 idx) | |
181 | { | |
182 | u32 offset = hisi_pcie_pmu_get_offset(reg_offset, idx); | |
183 | ||
184 | return readl_relaxed(pcie_pmu->base + offset); | |
185 | } | |
186 | ||
187 | static void hisi_pcie_pmu_writel(struct hisi_pcie_pmu *pcie_pmu, u32 reg_offset, u32 idx, u32 val) | |
188 | { | |
189 | u32 offset = hisi_pcie_pmu_get_offset(reg_offset, idx); | |
190 | ||
191 | writel_relaxed(val, pcie_pmu->base + offset); | |
192 | } | |
193 | ||
194 | static u64 hisi_pcie_pmu_readq(struct hisi_pcie_pmu *pcie_pmu, u32 reg_offset, u32 idx) | |
195 | { | |
196 | u32 offset = hisi_pcie_pmu_get_offset(reg_offset, idx); | |
197 | ||
198 | return readq_relaxed(pcie_pmu->base + offset); | |
199 | } | |
200 | ||
201 | static void hisi_pcie_pmu_writeq(struct hisi_pcie_pmu *pcie_pmu, u32 reg_offset, u32 idx, u64 val) | |
202 | { | |
203 | u32 offset = hisi_pcie_pmu_get_offset(reg_offset, idx); | |
204 | ||
205 | writeq_relaxed(val, pcie_pmu->base + offset); | |
206 | } | |
207 | ||
4d473461 | 208 | static u64 hisi_pcie_pmu_get_event_ctrl_val(struct perf_event *event) |
8404b0fb | 209 | { |
17d57398 | 210 | u64 port, trig_len, thr_len, len_mode; |
8404b0fb | 211 | u64 reg = HISI_PCIE_INIT_SET; |
8404b0fb QL |
212 | |
213 | /* Config HISI_PCIE_EVENT_CTRL according to event. */ | |
214 | reg |= FIELD_PREP(HISI_PCIE_EVENT_M, hisi_pcie_get_real_event(event)); | |
215 | ||
216 | /* Config HISI_PCIE_EVENT_CTRL according to root port or EP device. */ | |
217 | port = hisi_pcie_get_port(event); | |
218 | if (port) | |
219 | reg |= FIELD_PREP(HISI_PCIE_TARGET_M, port); | |
220 | else | |
221 | reg |= HISI_PCIE_TARGET_EN | | |
222 | FIELD_PREP(HISI_PCIE_TARGET_M, hisi_pcie_get_bdf(event)); | |
223 | ||
224 | /* Config HISI_PCIE_EVENT_CTRL according to trigger condition. */ | |
225 | trig_len = hisi_pcie_get_trig_len(event); | |
226 | if (trig_len) { | |
227 | reg |= FIELD_PREP(HISI_PCIE_TRIG_M, trig_len); | |
228 | reg |= FIELD_PREP(HISI_PCIE_TRIG_MODE_M, hisi_pcie_get_trig_mode(event)); | |
229 | reg |= HISI_PCIE_TRIG_EN; | |
230 | } | |
231 | ||
232 | /* Config HISI_PCIE_EVENT_CTRL according to threshold condition. */ | |
233 | thr_len = hisi_pcie_get_thr_len(event); | |
234 | if (thr_len) { | |
235 | reg |= FIELD_PREP(HISI_PCIE_THR_M, thr_len); | |
236 | reg |= FIELD_PREP(HISI_PCIE_THR_MODE_M, hisi_pcie_get_thr_mode(event)); | |
237 | reg |= HISI_PCIE_THR_EN; | |
238 | } | |
239 | ||
17d57398 YY |
240 | len_mode = hisi_pcie_get_len_mode(event); |
241 | if (len_mode) | |
242 | reg |= FIELD_PREP(HISI_PCIE_LEN_M, len_mode); | |
243 | else | |
244 | reg |= FIELD_PREP(HISI_PCIE_LEN_M, HISI_PCIE_LEN_M_DEFAULT); | |
245 | ||
4d473461 YY |
246 | return reg; |
247 | } | |
248 | ||
249 | static void hisi_pcie_pmu_config_event_ctrl(struct perf_event *event) | |
250 | { | |
251 | struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(event->pmu); | |
252 | struct hw_perf_event *hwc = &event->hw; | |
253 | u64 reg = hisi_pcie_pmu_get_event_ctrl_val(event); | |
254 | ||
8404b0fb QL |
255 | hisi_pcie_pmu_writeq(pcie_pmu, HISI_PCIE_EVENT_CTRL, hwc->idx, reg); |
256 | } | |
257 | ||
54a9e47e | 258 | static void hisi_pcie_pmu_clear_event_ctrl(struct perf_event *event) |
8404b0fb QL |
259 | { |
260 | struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(event->pmu); | |
261 | struct hw_perf_event *hwc = &event->hw; | |
262 | ||
263 | hisi_pcie_pmu_writeq(pcie_pmu, HISI_PCIE_EVENT_CTRL, hwc->idx, HISI_PCIE_INIT_SET); | |
264 | } | |
265 | ||
266 | static bool hisi_pcie_pmu_valid_requester_id(struct hisi_pcie_pmu *pcie_pmu, u32 bdf) | |
267 | { | |
268 | struct pci_dev *root_port, *pdev; | |
269 | u16 rp_bdf; | |
270 | ||
271 | pdev = pci_get_domain_bus_and_slot(pci_domain_nr(pcie_pmu->pdev->bus), PCI_BUS_NUM(bdf), | |
272 | GET_PCI_DEVFN(bdf)); | |
273 | if (!pdev) | |
274 | return false; | |
275 | ||
276 | root_port = pcie_find_root_port(pdev); | |
277 | if (!root_port) { | |
278 | pci_dev_put(pdev); | |
279 | return false; | |
280 | } | |
281 | ||
282 | pci_dev_put(pdev); | |
283 | rp_bdf = pci_dev_id(root_port); | |
284 | return rp_bdf >= pcie_pmu->bdf_min && rp_bdf <= pcie_pmu->bdf_max; | |
285 | } | |
286 | ||
287 | static bool hisi_pcie_pmu_valid_filter(struct perf_event *event, | |
288 | struct hisi_pcie_pmu *pcie_pmu) | |
289 | { | |
290 | u32 requester_id = hisi_pcie_get_bdf(event); | |
291 | ||
292 | if (hisi_pcie_get_thr_len(event) > HISI_PCIE_THR_MAX_VAL) | |
293 | return false; | |
294 | ||
295 | if (hisi_pcie_get_trig_len(event) > HISI_PCIE_TRIG_MAX_VAL) | |
296 | return false; | |
297 | ||
2f864fee JH |
298 | /* Need to explicitly set filter of "port" or "bdf" */ |
299 | if (!hisi_pcie_get_port(event) && | |
300 | !hisi_pcie_pmu_valid_requester_id(pcie_pmu, requester_id)) | |
301 | return false; | |
8404b0fb QL |
302 | |
303 | return true; | |
304 | } | |
305 | ||
b6693ad6 YY |
306 | /* |
307 | * Check Whether two events share the same config. The same config means not | |
308 | * only the event code, but also the filter settings of the two events are | |
309 | * the same. | |
310 | */ | |
8404b0fb QL |
311 | static bool hisi_pcie_pmu_cmp_event(struct perf_event *target, |
312 | struct perf_event *event) | |
313 | { | |
b6693ad6 YY |
314 | return hisi_pcie_pmu_get_event_ctrl_val(target) == |
315 | hisi_pcie_pmu_get_event_ctrl_val(event); | |
8404b0fb QL |
316 | } |
317 | ||
318 | static bool hisi_pcie_pmu_validate_event_group(struct perf_event *event) | |
319 | { | |
320 | struct perf_event *sibling, *leader = event->group_leader; | |
321 | struct perf_event *event_group[HISI_PCIE_MAX_COUNTERS]; | |
322 | int counters = 1; | |
323 | int num; | |
324 | ||
325 | event_group[0] = leader; | |
326 | if (!is_software_event(leader)) { | |
327 | if (leader->pmu != event->pmu) | |
328 | return false; | |
329 | ||
330 | if (leader != event && !hisi_pcie_pmu_cmp_event(leader, event)) | |
331 | event_group[counters++] = event; | |
332 | } | |
333 | ||
334 | for_each_sibling_event(sibling, event->group_leader) { | |
335 | if (is_software_event(sibling)) | |
336 | continue; | |
337 | ||
338 | if (sibling->pmu != event->pmu) | |
339 | return false; | |
340 | ||
341 | for (num = 0; num < counters; num++) { | |
342 | if (hisi_pcie_pmu_cmp_event(event_group[num], sibling)) | |
343 | break; | |
344 | } | |
345 | ||
346 | if (num == counters) | |
347 | event_group[counters++] = sibling; | |
348 | } | |
349 | ||
350 | return counters <= HISI_PCIE_MAX_COUNTERS; | |
351 | } | |
352 | ||
353 | static int hisi_pcie_pmu_event_init(struct perf_event *event) | |
354 | { | |
355 | struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(event->pmu); | |
356 | struct hw_perf_event *hwc = &event->hw; | |
357 | ||
6d7d51e8 YY |
358 | /* Check the type first before going on, otherwise it's not our event */ |
359 | if (event->attr.type != event->pmu->type) | |
360 | return -ENOENT; | |
361 | ||
8404b0fb QL |
362 | if (EXT_COUNTER_IS_USED(hisi_pcie_get_event(event))) |
363 | hwc->event_base = HISI_PCIE_EXT_CNT; | |
364 | else | |
365 | hwc->event_base = HISI_PCIE_CNT; | |
366 | ||
8404b0fb QL |
367 | /* Sampling is not supported. */ |
368 | if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK) | |
369 | return -EOPNOTSUPP; | |
370 | ||
371 | if (!hisi_pcie_pmu_valid_filter(event, pcie_pmu)) | |
372 | return -EINVAL; | |
373 | ||
374 | if (!hisi_pcie_pmu_validate_event_group(event)) | |
375 | return -EINVAL; | |
376 | ||
868f8a70 YY |
377 | event->cpu = pcie_pmu->on_cpu; |
378 | ||
8404b0fb QL |
379 | return 0; |
380 | } | |
381 | ||
382 | static u64 hisi_pcie_pmu_read_counter(struct perf_event *event) | |
383 | { | |
384 | struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(event->pmu); | |
385 | u32 idx = event->hw.idx; | |
386 | ||
387 | return hisi_pcie_pmu_readq(pcie_pmu, event->hw.event_base, idx); | |
388 | } | |
389 | ||
7da37705 JH |
390 | /* |
391 | * Check all work events, if a relevant event is found then we return it | |
392 | * first, otherwise return the first idle counter (need to reset). | |
393 | */ | |
394 | static int hisi_pcie_pmu_get_event_idx(struct hisi_pcie_pmu *pcie_pmu, | |
395 | struct perf_event *event) | |
8404b0fb | 396 | { |
7da37705 | 397 | int first_idle = -EAGAIN; |
8404b0fb QL |
398 | struct perf_event *sibling; |
399 | int idx; | |
400 | ||
401 | for (idx = 0; idx < HISI_PCIE_MAX_COUNTERS; idx++) { | |
402 | sibling = pcie_pmu->hw_events[idx]; | |
7da37705 JH |
403 | if (!sibling) { |
404 | if (first_idle == -EAGAIN) | |
405 | first_idle = idx; | |
8404b0fb | 406 | continue; |
7da37705 | 407 | } |
8404b0fb | 408 | |
8404b0fb | 409 | /* Related events must be used in group */ |
2fbf96ed JH |
410 | if (hisi_pcie_pmu_cmp_event(sibling, event) && |
411 | sibling->group_leader == event->group_leader) | |
8404b0fb | 412 | return idx; |
8404b0fb QL |
413 | } |
414 | ||
7da37705 | 415 | return first_idle; |
8404b0fb QL |
416 | } |
417 | ||
418 | static void hisi_pcie_pmu_event_update(struct perf_event *event) | |
419 | { | |
420 | struct hw_perf_event *hwc = &event->hw; | |
421 | u64 new_cnt, prev_cnt, delta; | |
422 | ||
423 | do { | |
424 | prev_cnt = local64_read(&hwc->prev_count); | |
425 | new_cnt = hisi_pcie_pmu_read_counter(event); | |
426 | } while (local64_cmpxchg(&hwc->prev_count, prev_cnt, | |
427 | new_cnt) != prev_cnt); | |
428 | ||
429 | delta = (new_cnt - prev_cnt) & HISI_PCIE_MAX_PERIOD; | |
430 | local64_add(delta, &event->count); | |
431 | } | |
432 | ||
433 | static void hisi_pcie_pmu_read(struct perf_event *event) | |
434 | { | |
435 | hisi_pcie_pmu_event_update(event); | |
436 | } | |
437 | ||
438 | static void hisi_pcie_pmu_set_period(struct perf_event *event) | |
439 | { | |
440 | struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(event->pmu); | |
441 | struct hw_perf_event *hwc = &event->hw; | |
442 | int idx = hwc->idx; | |
443 | ||
444 | local64_set(&hwc->prev_count, HISI_PCIE_INIT_VAL); | |
445 | hisi_pcie_pmu_writeq(pcie_pmu, HISI_PCIE_CNT, idx, HISI_PCIE_INIT_VAL); | |
446 | hisi_pcie_pmu_writeq(pcie_pmu, HISI_PCIE_EXT_CNT, idx, HISI_PCIE_INIT_VAL); | |
447 | } | |
448 | ||
449 | static void hisi_pcie_pmu_enable_counter(struct hisi_pcie_pmu *pcie_pmu, struct hw_perf_event *hwc) | |
450 | { | |
451 | u32 idx = hwc->idx; | |
452 | u64 val; | |
453 | ||
454 | val = hisi_pcie_pmu_readq(pcie_pmu, HISI_PCIE_EVENT_CTRL, idx); | |
455 | val |= HISI_PCIE_EVENT_EN; | |
456 | hisi_pcie_pmu_writeq(pcie_pmu, HISI_PCIE_EVENT_CTRL, idx, val); | |
457 | } | |
458 | ||
459 | static void hisi_pcie_pmu_disable_counter(struct hisi_pcie_pmu *pcie_pmu, struct hw_perf_event *hwc) | |
460 | { | |
461 | u32 idx = hwc->idx; | |
462 | u64 val; | |
463 | ||
464 | val = hisi_pcie_pmu_readq(pcie_pmu, HISI_PCIE_EVENT_CTRL, idx); | |
465 | val &= ~HISI_PCIE_EVENT_EN; | |
466 | hisi_pcie_pmu_writeq(pcie_pmu, HISI_PCIE_EVENT_CTRL, idx, val); | |
467 | } | |
468 | ||
469 | static void hisi_pcie_pmu_enable_int(struct hisi_pcie_pmu *pcie_pmu, struct hw_perf_event *hwc) | |
470 | { | |
471 | u32 idx = hwc->idx; | |
472 | ||
473 | hisi_pcie_pmu_writel(pcie_pmu, HISI_PCIE_INT_MASK, idx, 0); | |
474 | } | |
475 | ||
476 | static void hisi_pcie_pmu_disable_int(struct hisi_pcie_pmu *pcie_pmu, struct hw_perf_event *hwc) | |
477 | { | |
478 | u32 idx = hwc->idx; | |
479 | ||
480 | hisi_pcie_pmu_writel(pcie_pmu, HISI_PCIE_INT_MASK, idx, 1); | |
481 | } | |
482 | ||
483 | static void hisi_pcie_pmu_reset_counter(struct hisi_pcie_pmu *pcie_pmu, int idx) | |
484 | { | |
485 | hisi_pcie_pmu_writeq(pcie_pmu, HISI_PCIE_EVENT_CTRL, idx, HISI_PCIE_RESET_CNT); | |
486 | hisi_pcie_pmu_writeq(pcie_pmu, HISI_PCIE_EVENT_CTRL, idx, HISI_PCIE_INIT_SET); | |
487 | } | |
488 | ||
489 | static void hisi_pcie_pmu_start(struct perf_event *event, int flags) | |
490 | { | |
491 | struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(event->pmu); | |
492 | struct hw_perf_event *hwc = &event->hw; | |
493 | int idx = hwc->idx; | |
494 | u64 prev_cnt; | |
495 | ||
496 | if (WARN_ON_ONCE(!(hwc->state & PERF_HES_STOPPED))) | |
497 | return; | |
498 | ||
499 | WARN_ON_ONCE(!(hwc->state & PERF_HES_UPTODATE)); | |
500 | hwc->state = 0; | |
501 | ||
54a9e47e | 502 | hisi_pcie_pmu_config_event_ctrl(event); |
8404b0fb QL |
503 | hisi_pcie_pmu_enable_counter(pcie_pmu, hwc); |
504 | hisi_pcie_pmu_enable_int(pcie_pmu, hwc); | |
505 | hisi_pcie_pmu_set_period(event); | |
506 | ||
507 | if (flags & PERF_EF_RELOAD) { | |
508 | prev_cnt = local64_read(&hwc->prev_count); | |
509 | hisi_pcie_pmu_writeq(pcie_pmu, hwc->event_base, idx, prev_cnt); | |
510 | } | |
511 | ||
512 | perf_event_update_userpage(event); | |
513 | } | |
514 | ||
515 | static void hisi_pcie_pmu_stop(struct perf_event *event, int flags) | |
516 | { | |
517 | struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(event->pmu); | |
518 | struct hw_perf_event *hwc = &event->hw; | |
519 | ||
520 | hisi_pcie_pmu_event_update(event); | |
521 | hisi_pcie_pmu_disable_int(pcie_pmu, hwc); | |
522 | hisi_pcie_pmu_disable_counter(pcie_pmu, hwc); | |
54a9e47e | 523 | hisi_pcie_pmu_clear_event_ctrl(event); |
8404b0fb QL |
524 | WARN_ON_ONCE(hwc->state & PERF_HES_STOPPED); |
525 | hwc->state |= PERF_HES_STOPPED; | |
526 | ||
527 | if (hwc->state & PERF_HES_UPTODATE) | |
528 | return; | |
529 | ||
530 | hwc->state |= PERF_HES_UPTODATE; | |
531 | } | |
532 | ||
533 | static int hisi_pcie_pmu_add(struct perf_event *event, int flags) | |
534 | { | |
535 | struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(event->pmu); | |
536 | struct hw_perf_event *hwc = &event->hw; | |
537 | int idx; | |
538 | ||
539 | hwc->state = PERF_HES_STOPPED | PERF_HES_UPTODATE; | |
540 | ||
7da37705 | 541 | idx = hisi_pcie_pmu_get_event_idx(pcie_pmu, event); |
8404b0fb QL |
542 | if (idx < 0) |
543 | return idx; | |
544 | ||
545 | hwc->idx = idx; | |
8404b0fb | 546 | |
7da37705 JH |
547 | /* No enabled counter found with related event, reset it */ |
548 | if (!pcie_pmu->hw_events[idx]) { | |
549 | hisi_pcie_pmu_reset_counter(pcie_pmu, idx); | |
550 | pcie_pmu->hw_events[idx] = event; | |
551 | } | |
552 | ||
8404b0fb QL |
553 | if (flags & PERF_EF_START) |
554 | hisi_pcie_pmu_start(event, PERF_EF_RELOAD); | |
555 | ||
556 | return 0; | |
557 | } | |
558 | ||
559 | static void hisi_pcie_pmu_del(struct perf_event *event, int flags) | |
560 | { | |
561 | struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(event->pmu); | |
562 | struct hw_perf_event *hwc = &event->hw; | |
563 | ||
564 | hisi_pcie_pmu_stop(event, PERF_EF_UPDATE); | |
565 | pcie_pmu->hw_events[hwc->idx] = NULL; | |
566 | perf_event_update_userpage(event); | |
567 | } | |
568 | ||
569 | static void hisi_pcie_pmu_enable(struct pmu *pmu) | |
570 | { | |
571 | struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(pmu); | |
572 | int num; | |
573 | ||
574 | for (num = 0; num < HISI_PCIE_MAX_COUNTERS; num++) { | |
575 | if (pcie_pmu->hw_events[num]) | |
576 | break; | |
577 | } | |
578 | ||
579 | if (num == HISI_PCIE_MAX_COUNTERS) | |
580 | return; | |
581 | ||
582 | writel(HISI_PCIE_GLOBAL_EN, pcie_pmu->base + HISI_PCIE_GLOBAL_CTRL); | |
583 | } | |
584 | ||
585 | static void hisi_pcie_pmu_disable(struct pmu *pmu) | |
586 | { | |
587 | struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(pmu); | |
588 | ||
589 | writel(HISI_PCIE_GLOBAL_NONE, pcie_pmu->base + HISI_PCIE_GLOBAL_CTRL); | |
590 | } | |
591 | ||
592 | static irqreturn_t hisi_pcie_pmu_irq(int irq, void *data) | |
593 | { | |
594 | struct hisi_pcie_pmu *pcie_pmu = data; | |
595 | irqreturn_t ret = IRQ_NONE; | |
596 | struct perf_event *event; | |
597 | u32 overflown; | |
598 | int idx; | |
599 | ||
600 | for (idx = 0; idx < HISI_PCIE_MAX_COUNTERS; idx++) { | |
601 | overflown = hisi_pcie_pmu_readl(pcie_pmu, HISI_PCIE_INT_STAT, idx); | |
602 | if (!overflown) | |
603 | continue; | |
604 | ||
605 | /* Clear status of interrupt. */ | |
606 | hisi_pcie_pmu_writel(pcie_pmu, HISI_PCIE_INT_STAT, idx, 1); | |
607 | event = pcie_pmu->hw_events[idx]; | |
608 | if (!event) | |
609 | continue; | |
610 | ||
611 | hisi_pcie_pmu_event_update(event); | |
612 | hisi_pcie_pmu_set_period(event); | |
613 | ret = IRQ_HANDLED; | |
614 | } | |
615 | ||
616 | return ret; | |
617 | } | |
618 | ||
619 | static int hisi_pcie_pmu_irq_register(struct pci_dev *pdev, struct hisi_pcie_pmu *pcie_pmu) | |
620 | { | |
621 | int irq, ret; | |
622 | ||
623 | ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI); | |
624 | if (ret < 0) { | |
625 | pci_err(pdev, "Failed to enable MSI vectors: %d\n", ret); | |
626 | return ret; | |
627 | } | |
628 | ||
629 | irq = pci_irq_vector(pdev, 0); | |
630 | ret = request_irq(irq, hisi_pcie_pmu_irq, IRQF_NOBALANCING | IRQF_NO_THREAD, DRV_NAME, | |
631 | pcie_pmu); | |
632 | if (ret) { | |
633 | pci_err(pdev, "Failed to register IRQ: %d\n", ret); | |
634 | pci_free_irq_vectors(pdev); | |
635 | return ret; | |
636 | } | |
637 | ||
638 | pcie_pmu->irq = irq; | |
639 | ||
640 | return 0; | |
641 | } | |
642 | ||
643 | static void hisi_pcie_pmu_irq_unregister(struct pci_dev *pdev, struct hisi_pcie_pmu *pcie_pmu) | |
644 | { | |
645 | free_irq(pcie_pmu->irq, pcie_pmu); | |
646 | pci_free_irq_vectors(pdev); | |
647 | } | |
648 | ||
649 | static int hisi_pcie_pmu_online_cpu(unsigned int cpu, struct hlist_node *node) | |
650 | { | |
651 | struct hisi_pcie_pmu *pcie_pmu = hlist_entry_safe(node, struct hisi_pcie_pmu, node); | |
652 | ||
653 | if (pcie_pmu->on_cpu == -1) { | |
83a6d80c YY |
654 | pcie_pmu->on_cpu = cpumask_local_spread(0, dev_to_node(&pcie_pmu->pdev->dev)); |
655 | WARN_ON(irq_set_affinity(pcie_pmu->irq, cpumask_of(pcie_pmu->on_cpu))); | |
8404b0fb QL |
656 | } |
657 | ||
658 | return 0; | |
659 | } | |
660 | ||
661 | static int hisi_pcie_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node) | |
662 | { | |
663 | struct hisi_pcie_pmu *pcie_pmu = hlist_entry_safe(node, struct hisi_pcie_pmu, node); | |
664 | unsigned int target; | |
83a6d80c YY |
665 | cpumask_t mask; |
666 | int numa_node; | |
8404b0fb QL |
667 | |
668 | /* Nothing to do if this CPU doesn't own the PMU */ | |
669 | if (pcie_pmu->on_cpu != cpu) | |
670 | return 0; | |
671 | ||
672 | pcie_pmu->on_cpu = -1; | |
83a6d80c YY |
673 | |
674 | /* Choose a local CPU from all online cpus. */ | |
675 | numa_node = dev_to_node(&pcie_pmu->pdev->dev); | |
676 | if (cpumask_and(&mask, cpumask_of_node(numa_node), cpu_online_mask) && | |
677 | cpumask_andnot(&mask, &mask, cpumask_of(cpu))) | |
678 | target = cpumask_any(&mask); | |
679 | else | |
680 | target = cpumask_any_but(cpu_online_mask, cpu); | |
681 | ||
8404b0fb QL |
682 | if (target >= nr_cpu_ids) { |
683 | pci_err(pcie_pmu->pdev, "There is no CPU to set\n"); | |
684 | return 0; | |
685 | } | |
686 | ||
687 | perf_pmu_migrate_context(&pcie_pmu->pmu, cpu, target); | |
688 | /* Use this CPU for event counting */ | |
689 | pcie_pmu->on_cpu = target; | |
690 | WARN_ON(irq_set_affinity(pcie_pmu->irq, cpumask_of(target))); | |
691 | ||
692 | return 0; | |
693 | } | |
694 | ||
695 | static struct attribute *hisi_pcie_pmu_events_attr[] = { | |
696 | HISI_PCIE_PMU_EVENT_ATTR(rx_mwr_latency, 0x0010), | |
697 | HISI_PCIE_PMU_EVENT_ATTR(rx_mwr_cnt, 0x10010), | |
698 | HISI_PCIE_PMU_EVENT_ATTR(rx_mrd_latency, 0x0210), | |
699 | HISI_PCIE_PMU_EVENT_ATTR(rx_mrd_cnt, 0x10210), | |
700 | HISI_PCIE_PMU_EVENT_ATTR(tx_mrd_latency, 0x0011), | |
701 | HISI_PCIE_PMU_EVENT_ATTR(tx_mrd_cnt, 0x10011), | |
00ca69b8 YY |
702 | HISI_PCIE_PMU_EVENT_ATTR(rx_mwr_flux, 0x0104), |
703 | HISI_PCIE_PMU_EVENT_ATTR(rx_mwr_time, 0x10104), | |
6b4bb4f3 YY |
704 | HISI_PCIE_PMU_EVENT_ATTR(rx_mrd_flux, 0x0804), |
705 | HISI_PCIE_PMU_EVENT_ATTR(rx_mrd_time, 0x10804), | |
00ca69b8 YY |
706 | HISI_PCIE_PMU_EVENT_ATTR(rx_cpl_flux, 0x2004), |
707 | HISI_PCIE_PMU_EVENT_ATTR(rx_cpl_time, 0x12004), | |
708 | HISI_PCIE_PMU_EVENT_ATTR(tx_mwr_flux, 0x0105), | |
709 | HISI_PCIE_PMU_EVENT_ATTR(tx_mwr_time, 0x10105), | |
6b4bb4f3 YY |
710 | HISI_PCIE_PMU_EVENT_ATTR(tx_mrd_flux, 0x0405), |
711 | HISI_PCIE_PMU_EVENT_ATTR(tx_mrd_time, 0x10405), | |
00ca69b8 YY |
712 | HISI_PCIE_PMU_EVENT_ATTR(tx_cpl_flux, 0x1005), |
713 | HISI_PCIE_PMU_EVENT_ATTR(tx_cpl_time, 0x11005), | |
8404b0fb QL |
714 | NULL |
715 | }; | |
716 | ||
717 | static struct attribute_group hisi_pcie_pmu_events_group = { | |
718 | .name = "events", | |
719 | .attrs = hisi_pcie_pmu_events_attr, | |
720 | }; | |
721 | ||
722 | static struct attribute *hisi_pcie_pmu_format_attr[] = { | |
723 | HISI_PCIE_PMU_FORMAT_ATTR(event, "config:0-16"), | |
724 | HISI_PCIE_PMU_FORMAT_ATTR(thr_len, "config1:0-3"), | |
725 | HISI_PCIE_PMU_FORMAT_ATTR(thr_mode, "config1:4"), | |
726 | HISI_PCIE_PMU_FORMAT_ATTR(trig_len, "config1:5-8"), | |
727 | HISI_PCIE_PMU_FORMAT_ATTR(trig_mode, "config1:9"), | |
17d57398 | 728 | HISI_PCIE_PMU_FORMAT_ATTR(len_mode, "config1:10-11"), |
8404b0fb QL |
729 | HISI_PCIE_PMU_FORMAT_ATTR(port, "config2:0-15"), |
730 | HISI_PCIE_PMU_FORMAT_ATTR(bdf, "config2:16-31"), | |
731 | NULL | |
732 | }; | |
733 | ||
734 | static const struct attribute_group hisi_pcie_pmu_format_group = { | |
735 | .name = "format", | |
736 | .attrs = hisi_pcie_pmu_format_attr, | |
737 | }; | |
738 | ||
739 | static struct attribute *hisi_pcie_pmu_bus_attrs[] = { | |
740 | &dev_attr_bus.attr, | |
741 | NULL | |
742 | }; | |
743 | ||
744 | static const struct attribute_group hisi_pcie_pmu_bus_attr_group = { | |
745 | .attrs = hisi_pcie_pmu_bus_attrs, | |
746 | }; | |
747 | ||
748 | static struct attribute *hisi_pcie_pmu_cpumask_attrs[] = { | |
749 | &dev_attr_cpumask.attr, | |
750 | NULL | |
751 | }; | |
752 | ||
753 | static const struct attribute_group hisi_pcie_pmu_cpumask_attr_group = { | |
754 | .attrs = hisi_pcie_pmu_cpumask_attrs, | |
755 | }; | |
756 | ||
757 | static struct attribute *hisi_pcie_pmu_identifier_attrs[] = { | |
758 | &dev_attr_identifier.attr, | |
759 | NULL | |
760 | }; | |
761 | ||
762 | static const struct attribute_group hisi_pcie_pmu_identifier_attr_group = { | |
763 | .attrs = hisi_pcie_pmu_identifier_attrs, | |
764 | }; | |
765 | ||
766 | static const struct attribute_group *hisi_pcie_pmu_attr_groups[] = { | |
767 | &hisi_pcie_pmu_events_group, | |
768 | &hisi_pcie_pmu_format_group, | |
769 | &hisi_pcie_pmu_bus_attr_group, | |
770 | &hisi_pcie_pmu_cpumask_attr_group, | |
771 | &hisi_pcie_pmu_identifier_attr_group, | |
772 | NULL | |
773 | }; | |
774 | ||
775 | static int hisi_pcie_alloc_pmu(struct pci_dev *pdev, struct hisi_pcie_pmu *pcie_pmu) | |
776 | { | |
777 | struct hisi_pcie_reg_pair regs; | |
778 | u16 sicl_id, core_id; | |
779 | char *name; | |
780 | ||
781 | regs = hisi_pcie_parse_reg_value(pcie_pmu, HISI_PCIE_REG_BDF); | |
782 | pcie_pmu->bdf_min = regs.lo; | |
783 | pcie_pmu->bdf_max = regs.hi; | |
784 | ||
785 | regs = hisi_pcie_parse_reg_value(pcie_pmu, HISI_PCIE_REG_INFO); | |
786 | sicl_id = regs.hi; | |
787 | core_id = regs.lo; | |
788 | ||
789 | name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_pcie%u_core%u", sicl_id, core_id); | |
790 | if (!name) | |
791 | return -ENOMEM; | |
792 | ||
793 | pcie_pmu->pdev = pdev; | |
794 | pcie_pmu->on_cpu = -1; | |
795 | pcie_pmu->identifier = readl(pcie_pmu->base + HISI_PCIE_REG_VERSION); | |
796 | pcie_pmu->pmu = (struct pmu) { | |
797 | .name = name, | |
798 | .module = THIS_MODULE, | |
799 | .event_init = hisi_pcie_pmu_event_init, | |
800 | .pmu_enable = hisi_pcie_pmu_enable, | |
801 | .pmu_disable = hisi_pcie_pmu_disable, | |
802 | .add = hisi_pcie_pmu_add, | |
803 | .del = hisi_pcie_pmu_del, | |
804 | .start = hisi_pcie_pmu_start, | |
805 | .stop = hisi_pcie_pmu_stop, | |
806 | .read = hisi_pcie_pmu_read, | |
807 | .task_ctx_nr = perf_invalid_context, | |
808 | .attr_groups = hisi_pcie_pmu_attr_groups, | |
809 | .capabilities = PERF_PMU_CAP_NO_EXCLUDE, | |
810 | }; | |
811 | ||
812 | return 0; | |
813 | } | |
814 | ||
815 | static int hisi_pcie_init_pmu(struct pci_dev *pdev, struct hisi_pcie_pmu *pcie_pmu) | |
816 | { | |
817 | int ret; | |
818 | ||
819 | pcie_pmu->base = pci_ioremap_bar(pdev, 2); | |
820 | if (!pcie_pmu->base) { | |
821 | pci_err(pdev, "Ioremap failed for pcie_pmu resource\n"); | |
822 | return -ENOMEM; | |
823 | } | |
824 | ||
825 | ret = hisi_pcie_alloc_pmu(pdev, pcie_pmu); | |
826 | if (ret) | |
827 | goto err_iounmap; | |
828 | ||
829 | ret = hisi_pcie_pmu_irq_register(pdev, pcie_pmu); | |
830 | if (ret) | |
831 | goto err_iounmap; | |
832 | ||
833 | ret = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_HISI_PCIE_PMU_ONLINE, &pcie_pmu->node); | |
834 | if (ret) { | |
835 | pci_err(pdev, "Failed to register hotplug: %d\n", ret); | |
836 | goto err_irq_unregister; | |
837 | } | |
838 | ||
839 | ret = perf_pmu_register(&pcie_pmu->pmu, pcie_pmu->pmu.name, -1); | |
840 | if (ret) { | |
841 | pci_err(pdev, "Failed to register PCIe PMU: %d\n", ret); | |
842 | goto err_hotplug_unregister; | |
843 | } | |
844 | ||
845 | return ret; | |
846 | ||
847 | err_hotplug_unregister: | |
848 | cpuhp_state_remove_instance_nocalls( | |
849 | CPUHP_AP_PERF_ARM_HISI_PCIE_PMU_ONLINE, &pcie_pmu->node); | |
850 | ||
851 | err_irq_unregister: | |
852 | hisi_pcie_pmu_irq_unregister(pdev, pcie_pmu); | |
853 | ||
854 | err_iounmap: | |
855 | iounmap(pcie_pmu->base); | |
856 | ||
857 | return ret; | |
858 | } | |
859 | ||
860 | static void hisi_pcie_uninit_pmu(struct pci_dev *pdev) | |
861 | { | |
862 | struct hisi_pcie_pmu *pcie_pmu = pci_get_drvdata(pdev); | |
863 | ||
864 | perf_pmu_unregister(&pcie_pmu->pmu); | |
865 | cpuhp_state_remove_instance_nocalls( | |
866 | CPUHP_AP_PERF_ARM_HISI_PCIE_PMU_ONLINE, &pcie_pmu->node); | |
867 | hisi_pcie_pmu_irq_unregister(pdev, pcie_pmu); | |
868 | iounmap(pcie_pmu->base); | |
869 | } | |
870 | ||
871 | static int hisi_pcie_init_dev(struct pci_dev *pdev) | |
872 | { | |
873 | int ret; | |
874 | ||
875 | ret = pcim_enable_device(pdev); | |
876 | if (ret) { | |
877 | pci_err(pdev, "Failed to enable PCI device: %d\n", ret); | |
878 | return ret; | |
879 | } | |
880 | ||
881 | ret = pcim_iomap_regions(pdev, BIT(2), DRV_NAME); | |
882 | if (ret < 0) { | |
883 | pci_err(pdev, "Failed to request PCI mem regions: %d\n", ret); | |
884 | return ret; | |
885 | } | |
886 | ||
887 | pci_set_master(pdev); | |
888 | ||
889 | return 0; | |
890 | } | |
891 | ||
892 | static int hisi_pcie_pmu_probe(struct pci_dev *pdev, const struct pci_device_id *id) | |
893 | { | |
894 | struct hisi_pcie_pmu *pcie_pmu; | |
895 | int ret; | |
896 | ||
897 | pcie_pmu = devm_kzalloc(&pdev->dev, sizeof(*pcie_pmu), GFP_KERNEL); | |
898 | if (!pcie_pmu) | |
899 | return -ENOMEM; | |
900 | ||
901 | ret = hisi_pcie_init_dev(pdev); | |
902 | if (ret) | |
903 | return ret; | |
904 | ||
905 | ret = hisi_pcie_init_pmu(pdev, pcie_pmu); | |
906 | if (ret) | |
907 | return ret; | |
908 | ||
909 | pci_set_drvdata(pdev, pcie_pmu); | |
910 | ||
911 | return ret; | |
912 | } | |
913 | ||
914 | static void hisi_pcie_pmu_remove(struct pci_dev *pdev) | |
915 | { | |
916 | hisi_pcie_uninit_pmu(pdev); | |
917 | pci_set_drvdata(pdev, NULL); | |
918 | } | |
919 | ||
920 | static const struct pci_device_id hisi_pcie_pmu_ids[] = { | |
921 | { PCI_DEVICE(PCI_VENDOR_ID_HUAWEI, 0xa12d) }, | |
922 | { 0, } | |
923 | }; | |
924 | MODULE_DEVICE_TABLE(pci, hisi_pcie_pmu_ids); | |
925 | ||
926 | static struct pci_driver hisi_pcie_pmu_driver = { | |
927 | .name = DRV_NAME, | |
928 | .id_table = hisi_pcie_pmu_ids, | |
929 | .probe = hisi_pcie_pmu_probe, | |
930 | .remove = hisi_pcie_pmu_remove, | |
931 | }; | |
932 | ||
933 | static int __init hisi_pcie_module_init(void) | |
934 | { | |
935 | int ret; | |
936 | ||
937 | ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_HISI_PCIE_PMU_ONLINE, | |
938 | "AP_PERF_ARM_HISI_PCIE_PMU_ONLINE", | |
939 | hisi_pcie_pmu_online_cpu, | |
940 | hisi_pcie_pmu_offline_cpu); | |
941 | if (ret) { | |
942 | pr_err("Failed to setup PCIe PMU hotplug: %d\n", ret); | |
943 | return ret; | |
944 | } | |
945 | ||
946 | ret = pci_register_driver(&hisi_pcie_pmu_driver); | |
947 | if (ret) | |
948 | cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_PCIE_PMU_ONLINE); | |
949 | ||
950 | return ret; | |
951 | } | |
952 | module_init(hisi_pcie_module_init); | |
953 | ||
954 | static void __exit hisi_pcie_module_exit(void) | |
955 | { | |
956 | pci_unregister_driver(&hisi_pcie_pmu_driver); | |
957 | cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_PCIE_PMU_ONLINE); | |
958 | } | |
959 | module_exit(hisi_pcie_module_exit); | |
960 | ||
961 | MODULE_DESCRIPTION("HiSilicon PCIe PMU driver"); | |
962 | MODULE_LICENSE("GPL v2"); | |
963 | MODULE_AUTHOR("Qi Liu <liuqi115@huawei.com>"); |