1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2018 Broadcom
7 * DOC: VC4 V3D performance monitor module
9 * The V3D block provides 16 hardware counters which can count various events.
15 #define VC4_PERFMONID_MIN 1
16 #define VC4_PERFMONID_MAX U32_MAX
18 void vc4_perfmon_get(struct vc4_perfmon *perfmon)
20 struct vc4_dev *vc4 = perfmon->dev;
22 if (WARN_ON_ONCE(vc4->is_vc5))
26 refcount_inc(&perfmon->refcnt);
29 void vc4_perfmon_put(struct vc4_perfmon *perfmon)
37 if (WARN_ON_ONCE(vc4->is_vc5))
40 if (refcount_dec_and_test(&perfmon->refcnt))
44 void vc4_perfmon_start(struct vc4_dev *vc4, struct vc4_perfmon *perfmon)
49 if (WARN_ON_ONCE(vc4->is_vc5))
52 if (WARN_ON_ONCE(!perfmon || vc4->active_perfmon))
55 for (i = 0; i < perfmon->ncounters; i++)
56 V3D_WRITE(V3D_PCTRS(i), perfmon->events[i]);
58 mask = GENMASK(perfmon->ncounters - 1, 0);
59 V3D_WRITE(V3D_PCTRC, mask);
60 V3D_WRITE(V3D_PCTRE, V3D_PCTRE_EN | mask);
61 vc4->active_perfmon = perfmon;
64 void vc4_perfmon_stop(struct vc4_dev *vc4, struct vc4_perfmon *perfmon,
69 if (WARN_ON_ONCE(vc4->is_vc5))
72 if (WARN_ON_ONCE(!vc4->active_perfmon ||
73 perfmon != vc4->active_perfmon))
77 for (i = 0; i < perfmon->ncounters; i++)
78 perfmon->counters[i] += V3D_READ(V3D_PCTR(i));
81 V3D_WRITE(V3D_PCTRE, 0);
82 vc4->active_perfmon = NULL;
85 struct vc4_perfmon *vc4_perfmon_find(struct vc4_file *vc4file, int id)
87 struct vc4_dev *vc4 = vc4file->dev;
88 struct vc4_perfmon *perfmon;
90 if (WARN_ON_ONCE(vc4->is_vc5))
93 mutex_lock(&vc4file->perfmon.lock);
94 perfmon = idr_find(&vc4file->perfmon.idr, id);
95 vc4_perfmon_get(perfmon);
96 mutex_unlock(&vc4file->perfmon.lock);
101 void vc4_perfmon_open_file(struct vc4_file *vc4file)
103 struct vc4_dev *vc4 = vc4file->dev;
105 if (WARN_ON_ONCE(vc4->is_vc5))
108 mutex_init(&vc4file->perfmon.lock);
109 idr_init_base(&vc4file->perfmon.idr, VC4_PERFMONID_MIN);
113 static int vc4_perfmon_idr_del(int id, void *elem, void *data)
115 struct vc4_perfmon *perfmon = elem;
117 vc4_perfmon_put(perfmon);
122 void vc4_perfmon_close_file(struct vc4_file *vc4file)
124 struct vc4_dev *vc4 = vc4file->dev;
126 if (WARN_ON_ONCE(vc4->is_vc5))
129 mutex_lock(&vc4file->perfmon.lock);
130 idr_for_each(&vc4file->perfmon.idr, vc4_perfmon_idr_del, NULL);
131 idr_destroy(&vc4file->perfmon.idr);
132 mutex_unlock(&vc4file->perfmon.lock);
135 int vc4_perfmon_create_ioctl(struct drm_device *dev, void *data,
136 struct drm_file *file_priv)
138 struct vc4_dev *vc4 = to_vc4_dev(dev);
139 struct vc4_file *vc4file = file_priv->driver_priv;
140 struct drm_vc4_perfmon_create *req = data;
141 struct vc4_perfmon *perfmon;
145 if (WARN_ON_ONCE(vc4->is_vc5))
149 DRM_DEBUG("Creating perfmon no VC4 V3D probed\n");
153 /* Number of monitored counters cannot exceed HW limits. */
154 if (req->ncounters > DRM_VC4_MAX_PERF_COUNTERS ||
158 /* Make sure all events are valid. */
159 for (i = 0; i < req->ncounters; i++) {
160 if (req->events[i] >= VC4_PERFCNT_NUM_EVENTS)
164 perfmon = kzalloc(struct_size(perfmon, counters, req->ncounters),
170 for (i = 0; i < req->ncounters; i++)
171 perfmon->events[i] = req->events[i];
173 perfmon->ncounters = req->ncounters;
175 refcount_set(&perfmon->refcnt, 1);
177 mutex_lock(&vc4file->perfmon.lock);
178 ret = idr_alloc(&vc4file->perfmon.idr, perfmon, VC4_PERFMONID_MIN,
179 VC4_PERFMONID_MAX, GFP_KERNEL);
180 mutex_unlock(&vc4file->perfmon.lock);
191 int vc4_perfmon_destroy_ioctl(struct drm_device *dev, void *data,
192 struct drm_file *file_priv)
194 struct vc4_dev *vc4 = to_vc4_dev(dev);
195 struct vc4_file *vc4file = file_priv->driver_priv;
196 struct drm_vc4_perfmon_destroy *req = data;
197 struct vc4_perfmon *perfmon;
199 if (WARN_ON_ONCE(vc4->is_vc5))
203 DRM_DEBUG("Destroying perfmon no VC4 V3D probed\n");
207 mutex_lock(&vc4file->perfmon.lock);
208 perfmon = idr_remove(&vc4file->perfmon.idr, req->id);
209 mutex_unlock(&vc4file->perfmon.lock);
214 vc4_perfmon_put(perfmon);
218 int vc4_perfmon_get_values_ioctl(struct drm_device *dev, void *data,
219 struct drm_file *file_priv)
221 struct vc4_dev *vc4 = to_vc4_dev(dev);
222 struct vc4_file *vc4file = file_priv->driver_priv;
223 struct drm_vc4_perfmon_get_values *req = data;
224 struct vc4_perfmon *perfmon;
227 if (WARN_ON_ONCE(vc4->is_vc5))
231 DRM_DEBUG("Getting perfmon no VC4 V3D probed\n");
235 mutex_lock(&vc4file->perfmon.lock);
236 perfmon = idr_find(&vc4file->perfmon.idr, req->id);
237 vc4_perfmon_get(perfmon);
238 mutex_unlock(&vc4file->perfmon.lock);
243 if (copy_to_user(u64_to_user_ptr(req->values_ptr), perfmon->counters,
244 perfmon->ncounters * sizeof(u64)))
249 vc4_perfmon_put(perfmon);