1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <errno.h>
18#include <stdio.h>
19#include <string.h>
20#include <sys/mman.h>
21
22#include <hardware/memtrack.h>
23
24#include "memtrack_exynos5.h"
25
26#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
27#define min(x, y) ((x) < (y) ? (x) : (y))
28
29struct memtrack_record record_templates[] = {
30    {
31        .flags = MEMTRACK_FLAG_SMAPS_ACCOUNTED |
32                 MEMTRACK_FLAG_PRIVATE |
33                 MEMTRACK_FLAG_NONSECURE,
34    },
35    {
36        .flags = MEMTRACK_FLAG_SMAPS_UNACCOUNTED |
37                 MEMTRACK_FLAG_PRIVATE |
38                 MEMTRACK_FLAG_NONSECURE,
39    },
40};
41
42int mali_memtrack_get_memory(pid_t pid, int type,
43                             struct memtrack_record *records,
44                             size_t *num_records)
45{
46    size_t allocated_records = min(*num_records, ARRAY_SIZE(record_templates));
47    int i;
48    FILE *fp;
49    char line[1024];
50
51    *num_records = ARRAY_SIZE(record_templates);
52
53    /* fastpath to return the necessary number of records */
54    if (allocated_records == 0) {
55        return 0;
56    }
57
58    fp = fopen("/sys/devices/platform/mali.0/gpu_memory", "r");
59    if (fp == NULL) {
60        return -errno;
61    }
62
63    memcpy(records, record_templates,
64           sizeof(struct memtrack_record) * allocated_records);
65
66    while (1) {
67        if (fgets(line, sizeof(line), fp) == NULL) {
68            break;
69        }
70
71        /* Format:
72         * Name                 pid  cap(pages) usage(pages) unmapped(pages)
73         * =================================================================
74         * mali0                        524288      85163
75         *   ndroid.calendar  10708    1048575        181        111
76         */
77        if (line[0] == ' ' && line[1] == ' ') {
78            unsigned int allocated;
79            unsigned int unmapped;
80            int line_pid;
81
82            int ret = sscanf(line, "  %*s %u %*u %u %u\n",
83                             &line_pid, &allocated, &unmapped);
84            if (ret == 3 && line_pid == pid) {
85                if (allocated_records > 0) {
86                    records[0].size_in_bytes = (allocated - unmapped) * PAGE_SIZE;
87                }
88                if (allocated_records > 1) {
89                    records[1].size_in_bytes = unmapped * PAGE_SIZE;
90                }
91                break;
92            }
93        }
94    }
95
96    fclose(fp);
97
98    return 0;
99}
100