drivers/gator/gator_events_mali_common.c

/**
 * Copyright (C) Arm Limited 2012-2016. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */
#include "gator_events_mali_common.h"

extern int gator_mali_create_file_system(const char *mali_name, const char *event_name, struct super_block *sb, struct dentry *root, struct mali_counter *counter, unsigned long *event)
{
    int err;
    char buf[50];
    struct dentry *dir;

    /* If the counter name is empty ignore it */
    if (strlen(event_name) != 0) {
        /* Set up the filesystem entry for this event. */
        if (mali_name == NULL)
            snprintf(buf, sizeof(buf), "ARM_Mali-%s", event_name);
        else
            snprintf(buf, sizeof(buf), "ARM_Mali-%s_%s", mali_name, event_name);

        dir = gatorfs_mkdir(sb, root, buf);

        if (dir == NULL) {
            pr_err("gator: %s: error creating file system for: %s (%s)\n", mali_name, event_name, buf);
            return -1;
        }

        err = gatorfs_create_ulong(sb, dir, "enabled", &counter->enabled);
        if (err != 0) {
            pr_err("gator: %s: error calling gatorfs_create_ulong for: %s (%s)\n", mali_name, event_name, buf);
            return -1;
        }
        err = gatorfs_create_ro_ulong(sb, dir, "key", &counter->key);
        if (err != 0) {
            pr_err("gator: %s: error calling gatorfs_create_ro_ulong for: %s (%s)\n", mali_name, event_name, buf);
            return -1;
        }
        if (counter->cores != -1) {
            err = gatorfs_create_ro_ulong(sb, dir, "cores", &counter->cores);
            if (err != 0) {
                pr_err("gator: %s: error calling gatorfs_create_ro_ulong for: %s (%s)\n", mali_name, event_name, buf);
                return -1;
            }
        }
        if (event != NULL) {
            err = gatorfs_create_ulong(sb, dir, "event", event);
            if (err != 0) {
                pr_err("gator: %s: error calling gatorfs_create_ro_ulong for: %s (%s)\n", mali_name, event_name, buf);
                return -1;
            }
        }
    }

    return 0;
}

extern void gator_mali_initialise_counters(struct mali_counter counters[], unsigned int n_counters)
{
    unsigned int cnt;

    for (cnt = 0; cnt < n_counters; cnt++) {
        struct mali_counter *counter = &counters[cnt];

        counter->key = gator_events_get_key();
        counter->enabled = 0;
        counter->cores = -1;
    }
}