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6#include "v3d_drv.h"
7#include "v3d_regs.h"
8
9#define V3D_PERFMONID_MIN 1
10#define V3D_PERFMONID_MAX U32_MAX
11
12void v3d_perfmon_get(struct v3d_perfmon *perfmon)
13{
14 if (perfmon)
15 refcount_inc(&perfmon->refcnt);
16}
17
18void v3d_perfmon_put(struct v3d_perfmon *perfmon)
19{
20 if (perfmon && refcount_dec_and_test(&perfmon->refcnt))
21 kfree(perfmon);
22}
23
24void v3d_perfmon_start(struct v3d_dev *v3d, struct v3d_perfmon *perfmon)
25{
26 unsigned int i;
27 u32 mask;
28 u8 ncounters = perfmon->ncounters;
29
30 if (WARN_ON_ONCE(!perfmon || v3d->active_perfmon))
31 return;
32
33 mask = GENMASK(ncounters - 1, 0);
34
35 for (i = 0; i < ncounters; i++) {
36 u32 source = i / 4;
37 u32 channel = V3D_SET_FIELD(perfmon->counters[i], V3D_PCTR_S0);
38
39 i++;
40 channel |= V3D_SET_FIELD(i < ncounters ? perfmon->counters[i] : 0,
41 V3D_PCTR_S1);
42 i++;
43 channel |= V3D_SET_FIELD(i < ncounters ? perfmon->counters[i] : 0,
44 V3D_PCTR_S2);
45 i++;
46 channel |= V3D_SET_FIELD(i < ncounters ? perfmon->counters[i] : 0,
47 V3D_PCTR_S3);
48 V3D_CORE_WRITE(0, V3D_V4_PCTR_0_SRC_X(source), channel);
49 }
50
51 V3D_CORE_WRITE(0, V3D_V4_PCTR_0_CLR, mask);
52 V3D_CORE_WRITE(0, V3D_PCTR_0_OVERFLOW, mask);
53 V3D_CORE_WRITE(0, V3D_V4_PCTR_0_EN, mask);
54
55 v3d->active_perfmon = perfmon;
56}
57
58void v3d_perfmon_stop(struct v3d_dev *v3d, struct v3d_perfmon *perfmon,
59 bool capture)
60{
61 unsigned int i;
62
63 if (!perfmon || !v3d->active_perfmon)
64 return;
65
66 mutex_lock(&perfmon->lock);
67 if (perfmon != v3d->active_perfmon) {
68 mutex_unlock(&perfmon->lock);
69 return;
70 }
71
72 if (capture)
73 for (i = 0; i < perfmon->ncounters; i++)
74 perfmon->values[i] += V3D_CORE_READ(0, V3D_PCTR_0_PCTRX(i));
75
76 V3D_CORE_WRITE(0, V3D_V4_PCTR_0_EN, 0);
77
78 v3d->active_perfmon = NULL;
79 mutex_unlock(&perfmon->lock);
80}
81
82struct v3d_perfmon *v3d_perfmon_find(struct v3d_file_priv *v3d_priv, int id)
83{
84 struct v3d_perfmon *perfmon;
85
86 mutex_lock(&v3d_priv->perfmon.lock);
87 perfmon = idr_find(&v3d_priv->perfmon.idr, id);
88 v3d_perfmon_get(perfmon);
89 mutex_unlock(&v3d_priv->perfmon.lock);
90
91 return perfmon;
92}
93
94void v3d_perfmon_open_file(struct v3d_file_priv *v3d_priv)
95{
96 mutex_init(&v3d_priv->perfmon.lock);
97 idr_init(&v3d_priv->perfmon.idr);
98}
99
100static int v3d_perfmon_idr_del(int id, void *elem, void *data)
101{
102 struct v3d_perfmon *perfmon = elem;
103
104 v3d_perfmon_put(perfmon);
105
106 return 0;
107}
108
109void v3d_perfmon_close_file(struct v3d_file_priv *v3d_priv)
110{
111 mutex_lock(&v3d_priv->perfmon.lock);
112 idr_for_each(&v3d_priv->perfmon.idr, v3d_perfmon_idr_del, NULL);
113 idr_destroy(&v3d_priv->perfmon.idr);
114 mutex_unlock(&v3d_priv->perfmon.lock);
115}
116
117int v3d_perfmon_create_ioctl(struct drm_device *dev, void *data,
118 struct drm_file *file_priv)
119{
120 struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
121 struct drm_v3d_perfmon_create *req = data;
122 struct v3d_perfmon *perfmon;
123 unsigned int i;
124 int ret;
125
126
127 if (req->ncounters > DRM_V3D_MAX_PERF_COUNTERS ||
128 !req->ncounters)
129 return -EINVAL;
130
131
132 for (i = 0; i < req->ncounters; i++) {
133 if (req->counters[i] >= V3D_PERFCNT_NUM)
134 return -EINVAL;
135 }
136
137 perfmon = kzalloc(struct_size(perfmon, values, req->ncounters),
138 GFP_KERNEL);
139 if (!perfmon)
140 return -ENOMEM;
141
142 for (i = 0; i < req->ncounters; i++)
143 perfmon->counters[i] = req->counters[i];
144
145 perfmon->ncounters = req->ncounters;
146
147 refcount_set(&perfmon->refcnt, 1);
148 mutex_init(&perfmon->lock);
149
150 mutex_lock(&v3d_priv->perfmon.lock);
151 ret = idr_alloc(&v3d_priv->perfmon.idr, perfmon, V3D_PERFMONID_MIN,
152 V3D_PERFMONID_MAX, GFP_KERNEL);
153 mutex_unlock(&v3d_priv->perfmon.lock);
154
155 if (ret < 0) {
156 kfree(perfmon);
157 return ret;
158 }
159
160 req->id = ret;
161
162 return 0;
163}
164
165int v3d_perfmon_destroy_ioctl(struct drm_device *dev, void *data,
166 struct drm_file *file_priv)
167{
168 struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
169 struct drm_v3d_perfmon_destroy *req = data;
170 struct v3d_perfmon *perfmon;
171
172 mutex_lock(&v3d_priv->perfmon.lock);
173 perfmon = idr_remove(&v3d_priv->perfmon.idr, req->id);
174 mutex_unlock(&v3d_priv->perfmon.lock);
175
176 if (!perfmon)
177 return -EINVAL;
178
179 v3d_perfmon_put(perfmon);
180
181 return 0;
182}
183
184int v3d_perfmon_get_values_ioctl(struct drm_device *dev, void *data,
185 struct drm_file *file_priv)
186{
187 struct v3d_dev *v3d = to_v3d_dev(dev);
188 struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
189 struct drm_v3d_perfmon_get_values *req = data;
190 struct v3d_perfmon *perfmon;
191 int ret = 0;
192
193 if (req->pad != 0)
194 return -EINVAL;
195
196 mutex_lock(&v3d_priv->perfmon.lock);
197 perfmon = idr_find(&v3d_priv->perfmon.idr, req->id);
198 v3d_perfmon_get(perfmon);
199 mutex_unlock(&v3d_priv->perfmon.lock);
200
201 if (!perfmon)
202 return -EINVAL;
203
204 v3d_perfmon_stop(v3d, perfmon, true);
205
206 if (copy_to_user(u64_to_user_ptr(req->values_ptr), perfmon->values,
207 perfmon->ncounters * sizeof(u64)))
208 ret = -EFAULT;
209
210 v3d_perfmon_put(perfmon);
211
212 return ret;
213}
214
