upload android base code part4

android/hardware/qcom/display/msm8998/libmemtrack/kgsl.c

@@ -0,0 +1,144 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/mman.h>
+
+#include <hardware/memtrack.h>
+
+#include "memtrack_msm.h"
+
+#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
+#define min(x, y) ((x) < (y) ? (x) : (y))
+
+struct memtrack_record record_templates[] = {
+    {
+        .flags = MEMTRACK_FLAG_SMAPS_ACCOUNTED |
+                 MEMTRACK_FLAG_PRIVATE |
+                 MEMTRACK_FLAG_NONSECURE,
+    },
+    {
+        .flags = MEMTRACK_FLAG_SMAPS_UNACCOUNTED |
+                 MEMTRACK_FLAG_PRIVATE |
+                 MEMTRACK_FLAG_NONSECURE,
+    },
+};
+
+int kgsl_memtrack_get_memory(pid_t pid, enum memtrack_type type,
+                             struct memtrack_record *records,
+                             size_t *num_records)
+{
+    size_t allocated_records = min(*num_records, ARRAY_SIZE(record_templates));
+    FILE *fp;
+    char line[1024];
+    char tmp[128];
+    size_t accounted_size = 0;
+    size_t unaccounted_size = 0;
+
+    *num_records = ARRAY_SIZE(record_templates);
+
+    /* fastpath to return the necessary number of records */
+    if (allocated_records == 0) {
+        return 0;
+    }
+
+    memcpy(records, record_templates,
+           sizeof(struct memtrack_record) * allocated_records);
+
+    snprintf(tmp, sizeof(tmp), "/d/kgsl/proc/%d/mem", pid);
+    fp = fopen(tmp, "r");
+    if (fp == NULL) {
+        return -errno;
+    }
+
+    /* Go through each line of <pid>/mem file and for every entry of type "gpumem"
+     * check if the gpubuffer entry is usermapped or not. If the entry is usermapped
+     * count the entry as accounted else count the entry as unaccounted.
+     */
+    while (1) {
+        unsigned long size, mapsize;
+        char line_type[7];
+        char flags[10];
+        char line_usage[19];
+        int ret, egl_surface_count = 0, egl_image_count = 0;
+
+        if (fgets(line, sizeof(line), fp) == NULL) {
+            break;
+        }
+
+        /* Format:
+         *  gpuaddr useraddr     size    id flags       type            usage sglen mapsize eglsrf eglimg
+         * 545ba000 545ba000     4096     1 -----pY     gpumem      arraybuffer     1  4096      0      0
+         */
+        ret = sscanf(line, "%*x %*x %lu %*d %9s %6s %18s %*d %lu %6d %6d\n",
+                       &size, flags, line_type, line_usage, &mapsize,
+                       &egl_surface_count, &egl_image_count);
+        if (ret != 7) {
+            continue;
+        }
+
+        if (size == 0) {
+            fclose(fp);
+            return -EINVAL;
+        }
+
+        if (unaccounted_size + size < size) {
+            fclose(fp);
+            return -ERANGE;
+        }
+
+        if (type == MEMTRACK_TYPE_GL && strcmp(line_type, "gpumem") == 0) {
+
+            if (flags[6] == 'Y') {
+                if (accounted_size + mapsize < accounted_size) {
+                    fclose(fp);
+                    return -ERANGE;
+                }
+
+                accounted_size += mapsize;
+
+                if (mapsize > size) {
+                    fclose(fp);
+                    return -EINVAL;
+                }
+                unaccounted_size += size - mapsize;
+            } else {
+                unaccounted_size += size;
+            }
+        } else if (type == MEMTRACK_TYPE_GRAPHICS && strcmp(line_type, "ion") == 0) {
+            if (strcmp(line_usage, "egl_surface") == 0) {
+                unaccounted_size += size;
+            }
+            else if (egl_surface_count == 0) {
+                unaccounted_size += size / (egl_image_count ? egl_image_count : 1);
+            }
+        }
+    }
+
+    if (allocated_records > 0) {
+        records[0].size_in_bytes = accounted_size;
+    }
+    if (allocated_records > 1) {
+        records[1].size_in_bytes = unaccounted_size;
+    }
+
+    fclose(fp);
+
+    return 0;
+}