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Commit f499fca0 authored by Devdutt Patnaik's avatar Devdutt Patnaik Committed by Azhar Shaikh
Browse files

net: usbnet: Add debugfs support to track IPA packets 



Add debugfs support to display statistics for packets
pertaining to IPA s/w bridge.

Change-Id: Ia80809c157c2258db819e53662968b9e6794c90f
Signed-off-by: default avatarDevdutt Patnaik <dpatnaik@codeaurora.org>
Signed-off-by: default avatarAzhar Shaikh <azhars@codeaurora.org>
parent ef8af62e

drivers/net/usb/usbnet.c

+75 −0
Original line number Diff line number Diff line
@@ -45,6 +45,7 @@ 
#include <linux/slab.h>

#include <linux/kernel.h>

#include <linux/pm_runtime.h>

#include <linux/debugfs.h>



#define DRIVER_VERSION		"22-Aug-2005"
@@ -1530,6 +1531,75 @@ static void usbnet_bh (unsigned long param) 
 * USB Device Driver support

 *

 *-------------------------------------------------------------------------*/

static ssize_t usbnet_ipa_debugfs_read_stats(struct file *file,

					     char __user *user_buf,

					     size_t count, loff_t *ppos)

{

	struct usbnet *dev = file->private_data;

	struct usbnet_ipa_ctx *usbnet_ipa = dev->pusbnet_ipa;

	char *buf;

	unsigned int len = 0, buf_len = 1000;

	ssize_t ret_cnt;



	if (unlikely(!usbnet_ipa)) {

		pr_err("%s NULL Pointer\n", __func__);

		return -EINVAL;

	}



	buf = kzalloc(buf_len, GFP_KERNEL);

	if (!buf)

		return -ENOMEM;



	len += scnprintf(buf + len, buf_len - len, "%25s\n",

	"USBNET IPA stats");

	len += scnprintf(buf + len, buf_len - len, "%25s\n",

	"==================================================");

	len += scnprintf(buf + len, buf_len - len, "%25s %10llu\n",

	"IPA RX Pkt Send: ", usbnet_ipa->stats.rx_ipa_send);

	len += scnprintf(buf + len, buf_len - len, "%25s %10llu\n",

	"IPA RX IPA Send Fail: ", usbnet_ipa->stats.rx_ipa_send_fail);

	len += scnprintf(buf + len, buf_len - len, "%25s %10llu\n",

	"IPA RX Write done: ", usbnet_ipa->stats.rx_ipa_write_done);

	len += scnprintf(buf + len, buf_len - len, "%25s %10llu\n",

	"IPA RX Exception: ", usbnet_ipa->stats.rx_ipa_excep);

	len += scnprintf(buf + len, buf_len - len, "%25s %10llu\n",

	"IPA TX Send: ", usbnet_ipa->stats.tx_ipa_send);

	len += scnprintf(buf + len, buf_len - len, "%25s %10llu\n",

	"IPA TX Send Err: ", usbnet_ipa->stats.tx_ipa_send_err);



	if (len > buf_len)

		len = buf_len;



	ret_cnt = simple_read_from_buffer(user_buf, count, ppos, buf, len);

	kfree(buf);



	return ret_cnt;

}



static const struct file_operations fops_usbnet_ipa_stats = {

		.read = usbnet_ipa_debugfs_read_stats,

		.open = simple_open,

		.owner = THIS_MODULE,

		.llseek = default_llseek,

};



static int usbnet_debugfs_init(struct usbnet *dev)

{

	dev->pusbnet_ipa->debugfs_dir = debugfs_create_dir("usbnet", 0);

	if (!dev->pusbnet_ipa->debugfs_dir)

		return -ENOMEM;



	debugfs_create_file("stats", S_IRUSR, dev->pusbnet_ipa->debugfs_dir,

			    dev, &fops_usbnet_ipa_stats);



	return 0;

}



void usbnet_debugfs_exit(struct usbnet *dev)

{

	debugfs_remove_recursive(dev->pusbnet_ipa->debugfs_dir);

}



static void usbnet_ipa_cleanup_rm(void)

{

	int ret;
@@ -1583,6 +1653,7 @@ void usbnet_disconnect (struct usb_interface *intf) 
				"%s ODU bridge cleanup failed.\n",

				__func__);

		usbnet_ipa_cleanup_rm();

		usbnet_debugfs_exit(dev);

		kfree(dev->pusbnet_ipa);

	}

	usb_scuttle_anchored_urbs(&dev->deferred);
@@ -1946,6 +2017,10 @@ usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) 
			goto out4;

		}



		status = usbnet_debugfs_init(dev);

		if (status)

			pr_err("USBNET: Debugfs Init Failed\n");



		/* Initialize the ODU bridge driver now: odu_bridge_init()*/

		params_ptr->netdev_name = net->name;

		params_ptr->priv = dev;

include/linux/usb/usbnet.h

+1 −0
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ struct usbnet_ipa_stats { 


struct usbnet_ipa_ctx {

	struct usbnet_ipa_stats stats;

	struct dentry *debugfs_dir;

};



/* interface from usbnet core to each USB networking link we handle */