1 /*
2 * Copyright © 2021 Collabora, Ltd.
3 * Author: Antonio Caggiano <antonio.caggiano@collabora.com>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to deal
7 * in the Software without restriction, including without limitation the rights
8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 * copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
21 * THE SOFTWARE.
22 */
23
24 #include "pan_perf.h"
25
26 #include <pan_perf_metrics.h>
27 #include <lib/pan_device.h>
28 #include <drm-uapi/panfrost_drm.h>
29
30 #define PAN_COUNTERS_PER_CATEGORY 64
31 #define PAN_SHADER_CORE_INDEX 3
32
33 uint32_t
panfrost_perf_counter_read(const struct panfrost_perf_counter * counter,const struct panfrost_perf * perf)34 panfrost_perf_counter_read(const struct panfrost_perf_counter *counter,
35 const struct panfrost_perf *perf)
36 {
37 unsigned offset = perf->category_offset[counter->category_index];
38 offset += counter->offset;
39 assert(offset < perf->n_counter_values);
40
41 uint32_t ret = perf->counter_values[offset];
42
43 // If counter belongs to shader core, accumulate values for all other cores
44 if (counter->category_index == PAN_SHADER_CORE_INDEX) {
45 for (uint32_t core = 1; core < perf->dev->core_id_range; ++core) {
46 ret += perf->counter_values[offset + PAN_COUNTERS_PER_CATEGORY * core];
47 }
48 }
49
50 return ret;
51 }
52
53 static const struct panfrost_perf_config *
panfrost_lookup_counters(const char * name)54 panfrost_lookup_counters(const char *name)
55 {
56 for (unsigned i = 0; i < ARRAY_SIZE(panfrost_perf_configs); ++i) {
57 if (strcmp(panfrost_perf_configs[i]->name, name) == 0)
58 return panfrost_perf_configs[i];
59 }
60
61 return NULL;
62 }
63
64 void
panfrost_perf_init(struct panfrost_perf * perf,struct panfrost_device * dev)65 panfrost_perf_init(struct panfrost_perf *perf, struct panfrost_device *dev)
66 {
67 perf->dev = dev;
68
69 if (dev->model == NULL)
70 unreachable("Invalid GPU ID");
71
72 perf->cfg = panfrost_lookup_counters(dev->model->performance_counters);
73
74 if (perf->cfg == NULL)
75 unreachable("Performance counters missing!");
76
77 // Generally counter blocks are laid out in the following order:
78 // Job manager, tiler, one or more L2 caches, and one or more shader cores.
79 unsigned l2_slices = panfrost_query_l2_slices(dev);
80 uint32_t n_blocks = 2 + l2_slices + dev->core_id_range;
81 perf->n_counter_values = PAN_COUNTERS_PER_CATEGORY * n_blocks;
82 perf->counter_values = ralloc_array(perf, uint32_t, perf->n_counter_values);
83
84 /* Setup the layout */
85 perf->category_offset[0] = PAN_COUNTERS_PER_CATEGORY * 0;
86 perf->category_offset[1] = PAN_COUNTERS_PER_CATEGORY * 1;
87 perf->category_offset[2] = PAN_COUNTERS_PER_CATEGORY * 2;
88 perf->category_offset[3] = PAN_COUNTERS_PER_CATEGORY * (2 + l2_slices);
89 }
90
91 static int
panfrost_perf_query(struct panfrost_perf * perf,uint32_t enable)92 panfrost_perf_query(struct panfrost_perf *perf, uint32_t enable)
93 {
94 struct drm_panfrost_perfcnt_enable perfcnt_enable = {enable, 0};
95 return drmIoctl(perf->dev->fd, DRM_IOCTL_PANFROST_PERFCNT_ENABLE, &perfcnt_enable);
96 }
97
98 int
panfrost_perf_enable(struct panfrost_perf * perf)99 panfrost_perf_enable(struct panfrost_perf *perf)
100 {
101 return panfrost_perf_query(perf, 1 /* enable */);
102 }
103
104 int
panfrost_perf_disable(struct panfrost_perf * perf)105 panfrost_perf_disable(struct panfrost_perf *perf)
106 {
107 return panfrost_perf_query(perf, 0 /* disable */);
108 }
109
110 int
panfrost_perf_dump(struct panfrost_perf * perf)111 panfrost_perf_dump(struct panfrost_perf *perf)
112 {
113 // Dump performance counter values to the memory buffer pointed to by counter_values
114 struct drm_panfrost_perfcnt_dump perfcnt_dump = {(uint64_t)(uintptr_t)perf->counter_values};
115 return drmIoctl(perf->dev->fd, DRM_IOCTL_PANFROST_PERFCNT_DUMP, &perfcnt_dump);
116 }
117