linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * Interconnect framework core driver

 *

 * Copyright (c) 2017-2019, Linaro Ltd.

 * Author: Georgi Djakov <georgi.djakov@linaro.org>

 */

​

#include <linux/debugfs.h>

#include <linux/device.h>

#include <linux/idr.h>

#include <linux/init.h>

#include <linux/interconnect.h>

#include <linux/interconnect-provider.h>

#include <linux/list.h>

#include <linux/module.h>

#include <linux/mutex.h>

#include <linux/slab.h>

#include <linux/of.h>

#include <linux/overflow.h>

​

static DEFINE_IDR(icc_idr);

static LIST_HEAD(icc_providers);

static DEFINE_MUTEX(icc_lock);

static struct dentry *icc_debugfs_dir;

​

/**

 * struct icc_req - constraints that are attached to each node

 * @req_node: entry in list of requests for the particular @node

 * @node: the interconnect node to which this constraint applies

 * @dev: reference to the device that sets the constraints

 * @avg_bw: an integer describing the average bandwidth in kBps

 * @peak_bw: an integer describing the peak bandwidth in kBps

 */

struct icc_req {

    struct hlist_node req_node;

    struct icc_node *node;

    struct device *dev;

    u32 avg_bw;

    u32 peak_bw;

};

​

/**

 * struct icc_path - interconnect path structure

 * @num_nodes: number of hops (nodes)

 * @reqs: array of the requests applicable to this path of nodes

 */

struct icc_path {

    size_t num_nodes;

    struct icc_req reqs[];

};

​

static void icc_summary_show_one(struct seq_file *s, struct icc_node *n)

{

    if (!n)

        return;

​

    seq_printf(s, "%-30s %12u %12u\n",

           n->name, n->avg_bw, n->peak_bw);

}

​

static int icc_summary_show(struct seq_file *s, void *data)

{