interconnect: Add debugfs support (3697ff43) · Commits · 戴 / test

drivers/interconnect/core.c

+70 −0

Original line number	Diff line number	Diff line
		@@ -6,6 +6,7 @@
		* Author: Georgi Djakov <georgi.djakov@linaro.org>
		*/

		#include <linux/debugfs.h>
		#include <linux/device.h>
		#include <linux/idr.h>
		#include <linux/init.h>
		@@ -21,6 +22,7 @@
		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
		@@ -48,6 +50,59 @@ struct icc_path {
		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)
		{
		struct icc_provider *provider;

		seq_puts(s, " node avg peak\n");
		seq_puts(s, "--------------------------------------------------------\n");

		mutex_lock(&icc_lock);

		list_for_each_entry(provider, &icc_providers, provider_list) {
		struct icc_node *n;

		list_for_each_entry(n, &provider->nodes, node_list) {
		struct icc_req *r;

		icc_summary_show_one(s, n);
		hlist_for_each_entry(r, &n->req_list, req_node) {
		if (!r->dev)
		continue;

		seq_printf(s, " %-26s %12u %12u\n",
		dev_name(r->dev), r->avg_bw,
		r->peak_bw);
		}
		}
		}

		mutex_unlock(&icc_lock);

		return 0;
		}

		static int icc_summary_open(struct inode inode, struct file file)
		{
		return single_open(file, icc_summary_show, inode->i_private);
		}

		static const struct file_operations icc_summary_fops = {
		.open = icc_summary_open,
		.read = seq_read,
		.llseek = seq_lseek,
		.release = single_release,
		};

		static struct icc_node *node_find(const int id)
		{
		return idr_find(&icc_idr, id);
		@@ -711,6 +766,21 @@ int icc_provider_del(struct icc_provider *provider)
		}
		EXPORT_SYMBOL_GPL(icc_provider_del);

		static int __init icc_init(void)
		{
		icc_debugfs_dir = debugfs_create_dir("interconnect", NULL);
		debugfs_create_file("interconnect_summary", 0444,
		icc_debugfs_dir, NULL, &icc_summary_fops);
		return 0;
		}

		static void __exit icc_exit(void)
		{
		debugfs_remove_recursive(icc_debugfs_dir);
		}
		module_init(icc_init);
		module_exit(icc_exit);

		MODULE_AUTHOR("Georgi Djakov <georgi.djakov@linaro.org>");
		MODULE_DESCRIPTION("Interconnect Driver Core");
		MODULE_LICENSE("GPL v2");

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