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 <stdbool.h>
19 #include <stdio.h>
20 #include <string.h>
21 #include <sys/mman.h>
22
23 #include <hardware/memtrack.h>
24
25 #include "memtrack_msm.h"
26
27 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
28 #define min(x, y) ((x) < (y) ? (x) : (y))
29
30 struct memtrack_record record_templates[] = {
31 {
32 .flags = MEMTRACK_FLAG_SMAPS_ACCOUNTED |
33 MEMTRACK_FLAG_PRIVATE |
34 MEMTRACK_FLAG_NONSECURE,
35 },
36 {
37 .flags = MEMTRACK_FLAG_SMAPS_UNACCOUNTED |
38 MEMTRACK_FLAG_PRIVATE |
39 MEMTRACK_FLAG_NONSECURE,
40 },
41 };
42
kgsl_memtrack_get_memory(pid_t pid,enum memtrack_type type,struct memtrack_record * records,size_t * num_records)43 int kgsl_memtrack_get_memory(pid_t pid, enum memtrack_type type,
44 struct memtrack_record *records,
45 size_t *num_records)
46 {
47 size_t allocated_records = min(*num_records, ARRAY_SIZE(record_templates));
48 char syspath[128];
49 size_t accounted_size = 0;
50 size_t unaccounted_size = 0;
51 FILE *fp;
52 int ret;
53
54 *num_records = ARRAY_SIZE(record_templates);
55
56 /* fastpath to return the necessary number of records */
57 if (allocated_records == 0)
58 return 0;
59
60 memcpy(records, record_templates,
61 sizeof(struct memtrack_record) * allocated_records);
62
63 if (type == MEMTRACK_TYPE_GL) {
64
65 snprintf(syspath, sizeof(syspath),
66 "/sys/class/kgsl/kgsl/proc/%d/gpumem_mapped", pid);
67
68 fp = fopen(syspath, "r");
69 if (fp == NULL)
70 return -errno;
71
72 ret = fscanf(fp, "%zu", &accounted_size);
73 if (ret != 1) {
74 fclose(fp);
75 return -EINVAL;
76 }
77 fclose(fp);
78
79 snprintf(syspath, sizeof(syspath),
80 "/sys/class/kgsl/kgsl/proc/%d/gpumem_unmapped", pid);
81
82 fp = fopen(syspath, "r");
83 if (fp == NULL) {
84 return -errno;
85 }
86
87 ret = fscanf(fp, "%zu", &unaccounted_size);
88 if (ret != 1) {
89 fclose(fp);
90 return -EINVAL;
91 }
92 fclose(fp);
93
94 } else if (type == MEMTRACK_TYPE_GRAPHICS) {
95
96 snprintf(syspath, sizeof(syspath),
97 "/sys/class/kgsl/kgsl/proc/%d/imported_mem", pid);
98
99 fp = fopen(syspath, "r");
100 if (fp == NULL)
101 return -errno;
102
103 ret = fscanf(fp, "%zu", &unaccounted_size);
104 if (ret != 1) {
105 fclose(fp);
106 return -EINVAL;
107 }
108 fclose(fp);
109 }
110
111 if (allocated_records > 0)
112 records[0].size_in_bytes = accounted_size;
113
114 if (allocated_records > 1)
115 records[1].size_in_bytes = unaccounted_size;
116
117 return 0;
118 }
119