1/*
2 *  Ralink SoC ethernet driver debugfs code
3 *
4 *  Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
5 *
6 *  This program is free software; you can redistribute it and/or modify it
7 *  under the terms of the GNU General Public License version 2 as published
8 *  by the Free Software Foundation.
9 */
10
11#include <linux/debugfs.h>
12#include <linux/module.h>
13#include <linux/phy.h>
14
15#include "ramips_eth.h"
16
17static struct dentry *raeth_debugfs_root;
18
19static int raeth_debugfs_generic_open(struct inode *inode, struct file *file)
20{
21	file->private_data = inode->i_private;
22	return 0;
23}
24
25void raeth_debugfs_update_int_stats(struct raeth_priv *re, u32 status)
26{
27	re->debug.int_stats.total += !!status;
28
29	re->debug.int_stats.rx_delayed += !!(status & RAMIPS_RX_DLY_INT);
30	re->debug.int_stats.rx_done0 += !!(status & RAMIPS_RX_DONE_INT0);
31	re->debug.int_stats.rx_coherent += !!(status & RAMIPS_RX_COHERENT);
32
33	re->debug.int_stats.tx_delayed += !!(status & RAMIPS_TX_DLY_INT);
34	re->debug.int_stats.tx_done0 += !!(status & RAMIPS_TX_DONE_INT0);
35	re->debug.int_stats.tx_done1 += !!(status & RAMIPS_TX_DONE_INT1);
36	re->debug.int_stats.tx_done2 += !!(status & RAMIPS_TX_DONE_INT2);
37	re->debug.int_stats.tx_done3 += !!(status & RAMIPS_TX_DONE_INT3);
38	re->debug.int_stats.tx_coherent += !!(status & RAMIPS_TX_COHERENT);
39
40	re->debug.int_stats.pse_fq_empty += !!(status & RAMIPS_PSE_FQ_EMPTY);
41	re->debug.int_stats.pse_p0_fc += !!(status & RAMIPS_PSE_P0_FC);
42	re->debug.int_stats.pse_p1_fc += !!(status & RAMIPS_PSE_P1_FC);
43	re->debug.int_stats.pse_p2_fc += !!(status & RAMIPS_PSE_P2_FC);
44	re->debug.int_stats.pse_buf_drop += !!(status & RAMIPS_PSE_BUF_DROP);
45}
46
47static ssize_t read_file_int_stats(struct file *file, char __user *user_buf,
48				   size_t count, loff_t *ppos)
49{
50#define PR_INT_STAT(_label, _field)					\
51	len += snprintf(buf + len, sizeof(buf) - len,			\
52		"%-18s: %10lu\n", _label, re->debug.int_stats._field);
53
54	struct raeth_priv *re = file->private_data;
55	char buf[512];
56	unsigned int len = 0;
57	unsigned long flags;
58
59	spin_lock_irqsave(&re->page_lock, flags);
60
61	PR_INT_STAT("RX Delayed", rx_delayed);
62	PR_INT_STAT("RX Done 0", rx_done0);
63	PR_INT_STAT("RX Coherent", rx_coherent);
64
65	PR_INT_STAT("TX Delayed", tx_delayed);
66	PR_INT_STAT("TX Done 0", tx_done0);
67	PR_INT_STAT("TX Done 1", tx_done1);
68	PR_INT_STAT("TX Done 2", tx_done2);
69	PR_INT_STAT("TX Done 3", tx_done3);
70	PR_INT_STAT("TX Coherent", tx_coherent);
71
72	PR_INT_STAT("PSE FQ empty", pse_fq_empty);
73	PR_INT_STAT("CDMA Flow control", pse_p0_fc);
74	PR_INT_STAT("GDMA1 Flow control", pse_p1_fc);
75	PR_INT_STAT("GDMA2 Flow control", pse_p2_fc);
76	PR_INT_STAT("PSE discard", pse_buf_drop);
77
78	len += snprintf(buf + len, sizeof(buf) - len, "\n");
79	PR_INT_STAT("Total", total);
80
81	spin_unlock_irqrestore(&re->page_lock, flags);
82
83	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
84#undef PR_INT_STAT
85}
86
87static const struct file_operations raeth_fops_int_stats = {
88	.open	= raeth_debugfs_generic_open,
89	.read	= read_file_int_stats,
90	.owner	= THIS_MODULE
91};
92
93void raeth_debugfs_exit(struct raeth_priv *re)
94{
95	debugfs_remove_recursive(re->debug.debugfs_dir);
96}
97
98int raeth_debugfs_init(struct raeth_priv *re)
99{
100	re->debug.debugfs_dir = debugfs_create_dir(re->netdev->name,
101						   raeth_debugfs_root);
102	if (!re->debug.debugfs_dir)
103		return -ENOMEM;
104
105	debugfs_create_file("int_stats", S_IRUGO, re->debug.debugfs_dir,
106			    re, &raeth_fops_int_stats);
107
108	return 0;
109}
110
111int raeth_debugfs_root_init(void)
112{
113	if (raeth_debugfs_root)
114		return -EBUSY;
115
116	raeth_debugfs_root = debugfs_create_dir("raeth", NULL);
117	if (!raeth_debugfs_root)
118		return -ENOENT;
119
120	return 0;
121}
122
123void raeth_debugfs_root_exit(void)
124{
125	debugfs_remove(raeth_debugfs_root);
126	raeth_debugfs_root = NULL;
127}
128