1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
/*
*
* (C) COPYRIGHT 2020-2023 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the
* GNU General Public License version 2 as published by the Free Software
* Foundation, and any use by you of this program is subject to the terms
* of such GNU license.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you can access it online at
* http://www.gnu.org/licenses/gpl-2.0.html.
*
*/
#include "mali_kbase_ccswe.h"
#include "mali_kbase_linux.h"
#include <linux/math64.h>
#include <linux/time.h>
static u64 kbasep_ccswe_cycle_at_no_lock(struct kbase_ccswe *self, u64 timestamp_ns)
{
s64 diff_s, diff_ns;
u32 gpu_freq;
lockdep_assert_held(&self->access);
diff_ns = (s64)(timestamp_ns - self->timestamp_ns);
gpu_freq = diff_ns > 0 ? self->gpu_freq : self->prev_gpu_freq;
diff_s = div_s64(diff_ns, NSEC_PER_SEC);
diff_ns -= diff_s * NSEC_PER_SEC;
return self->cycles_elapsed + (u64)diff_s * gpu_freq +
(u64)div_s64(diff_ns * gpu_freq, NSEC_PER_SEC);
}
void kbase_ccswe_init(struct kbase_ccswe *self)
{
memset(self, 0, sizeof(*self));
spin_lock_init(&self->access);
}
u64 kbase_ccswe_cycle_at(struct kbase_ccswe *self, u64 timestamp_ns)
{
unsigned long flags;
u64 result;
spin_lock_irqsave(&self->access, flags);
result = kbasep_ccswe_cycle_at_no_lock(self, timestamp_ns);
spin_unlock_irqrestore(&self->access, flags);
return result;
}
void kbase_ccswe_freq_change(struct kbase_ccswe *self, u64 timestamp_ns, u32 gpu_freq)
{
unsigned long flags;
spin_lock_irqsave(&self->access, flags);
/* The time must go only forward. */
if (WARN_ON(timestamp_ns < self->timestamp_ns))
goto exit;
/* If this is the first frequency change, cycles_elapsed is zero. */
if (self->timestamp_ns)
self->cycles_elapsed = kbasep_ccswe_cycle_at_no_lock(self, timestamp_ns);
self->timestamp_ns = timestamp_ns;
self->prev_gpu_freq = self->gpu_freq;
self->gpu_freq = gpu_freq;
exit:
spin_unlock_irqrestore(&self->access, flags);
}
void kbase_ccswe_reset(struct kbase_ccswe *self)
{
unsigned long flags;
spin_lock_irqsave(&self->access, flags);
self->timestamp_ns = 0;
self->cycles_elapsed = 0;
self->gpu_freq = 0;
self->prev_gpu_freq = 0;
spin_unlock_irqrestore(&self->access, flags);
}
|
