Root/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_debugfs.c

1/*
2 * Atheros AR71xx built-in ethernet mac driver
3 *
4 * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
5 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
6 *
7 * Based on Atheros' AG7100 driver
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License version 2 as published
11 * by the Free Software Foundation.
12 */
13
14#include <linux/debugfs.h>
15
16#include "ag71xx.h"
17
18static struct dentry *ag71xx_debugfs_root;
19
20static int ag71xx_debugfs_generic_open(struct inode *inode, struct file *file)
21{
22    file->private_data = inode->i_private;
23    return 0;
24}
25
26void ag71xx_debugfs_update_int_stats(struct ag71xx *ag, u32 status)
27{
28    if (status)
29        ag->debug.int_stats.total++;
30    if (status & AG71XX_INT_TX_PS)
31        ag->debug.int_stats.tx_ps++;
32    if (status & AG71XX_INT_TX_UR)
33        ag->debug.int_stats.tx_ur++;
34    if (status & AG71XX_INT_TX_BE)
35        ag->debug.int_stats.tx_be++;
36    if (status & AG71XX_INT_RX_PR)
37        ag->debug.int_stats.rx_pr++;
38    if (status & AG71XX_INT_RX_OF)
39        ag->debug.int_stats.rx_of++;
40    if (status & AG71XX_INT_RX_BE)
41        ag->debug.int_stats.rx_be++;
42}
43
44static ssize_t read_file_int_stats(struct file *file, char __user *user_buf,
45                   size_t count, loff_t *ppos)
46{
47#define PR_INT_STAT(_label, _field) \
48    len += snprintf(buf + len, sizeof(buf) - len, \
49        "%20s: %10lu\n", _label, ag->debug.int_stats._field);
50
51    struct ag71xx *ag = file->private_data;
52    char buf[256];
53    unsigned int len = 0;
54
55    PR_INT_STAT("TX Packet Sent", tx_ps);
56    PR_INT_STAT("TX Underrun", tx_ur);
57    PR_INT_STAT("TX Bus Error", tx_be);
58    PR_INT_STAT("RX Packet Received", rx_pr);
59    PR_INT_STAT("RX Overflow", rx_of);
60    PR_INT_STAT("RX Bus Error", rx_be);
61    len += snprintf(buf + len, sizeof(buf) - len, "\n");
62    PR_INT_STAT("Total", total);
63
64    return simple_read_from_buffer(user_buf, count, ppos, buf, len);
65#undef PR_INT_STAT
66}
67
68static const struct file_operations ag71xx_fops_int_stats = {
69    .open = ag71xx_debugfs_generic_open,
70    .read = read_file_int_stats,
71    .owner = THIS_MODULE
72};
73
74void ag71xx_debugfs_update_napi_stats(struct ag71xx *ag, int rx, int tx)
75{
76    struct ag71xx_napi_stats *stats = &ag->debug.napi_stats;
77
78    if (rx) {
79        stats->rx_count++;
80        stats->rx_packets += rx;
81        if (rx <= AG71XX_NAPI_WEIGHT)
82            stats->rx[rx]++;
83        if (rx > stats->rx_packets_max)
84            stats->rx_packets_max = rx;
85    }
86
87    if (tx) {
88        stats->tx_count++;
89        stats->tx_packets += tx;
90        if (tx <= AG71XX_NAPI_WEIGHT)
91            stats->tx[tx]++;
92        if (tx > stats->tx_packets_max)
93            stats->tx_packets_max = tx;
94    }
95}
96
97static ssize_t read_file_napi_stats(struct file *file, char __user *user_buf,
98                    size_t count, loff_t *ppos)
99{
100    struct ag71xx *ag = file->private_data;
101    struct ag71xx_napi_stats *stats = &ag->debug.napi_stats;
102    char buf[2048];
103    unsigned int len = 0;
104    unsigned long rx_avg = 0;
105    unsigned long tx_avg = 0;
106    int i;
107
108    if (stats->rx_count)
109        rx_avg = stats->rx_packets / stats->rx_count;
110
111    if (stats->tx_count)
112        tx_avg = stats->tx_packets / stats->tx_count;
113
114    len += snprintf(buf + len, sizeof(buf) - len, "%3s %10s %10s\n",
115            "len", "rx", "tx");
116
117    for (i = 1; i <= AG71XX_NAPI_WEIGHT; i++)
118        len += snprintf(buf + len, sizeof(buf) - len,
119                "%3d: %10lu %10lu\n",
120                i, stats->rx[i], stats->tx[i]);
121
122    len += snprintf(buf + len, sizeof(buf) - len, "\n");
123
124    len += snprintf(buf + len, sizeof(buf) - len, "%3s: %10lu %10lu\n",
125            "sum", stats->rx_count, stats->tx_count);
126    len += snprintf(buf + len, sizeof(buf) - len, "%3s: %10lu %10lu\n",
127            "avg", rx_avg, tx_avg);
128    len += snprintf(buf + len, sizeof(buf) - len, "%3s: %10lu %10lu\n",
129            "max", stats->rx_packets_max, stats->tx_packets_max);
130    len += snprintf(buf + len, sizeof(buf) - len, "%3s: %10lu %10lu\n",
131            "pkt", stats->rx_packets, stats->tx_packets);
132
133    return simple_read_from_buffer(user_buf, count, ppos, buf, len);
134}
135
136static const struct file_operations ag71xx_fops_napi_stats = {
137    .open = ag71xx_debugfs_generic_open,
138    .read = read_file_napi_stats,
139    .owner = THIS_MODULE
140};
141
142void ag71xx_debugfs_exit(struct ag71xx *ag)
143{
144    debugfs_remove(ag->debug.debugfs_napi_stats);
145    debugfs_remove(ag->debug.debugfs_int_stats);
146    debugfs_remove(ag->debug.debugfs_dir);
147}
148
149int ag71xx_debugfs_init(struct ag71xx *ag)
150{
151    ag->debug.debugfs_dir = debugfs_create_dir(ag->dev->name,
152                           ag71xx_debugfs_root);
153    if (!ag->debug.debugfs_dir)
154        goto err;
155
156    ag->debug.debugfs_int_stats =
157            debugfs_create_file("int_stats",
158                        S_IRUGO,
159                        ag->debug.debugfs_dir,
160                        ag,
161                        &ag71xx_fops_int_stats);
162    if (!ag->debug.debugfs_int_stats)
163        goto err;
164
165    ag->debug.debugfs_napi_stats =
166            debugfs_create_file("napi_stats",
167                        S_IRUGO,
168                        ag->debug.debugfs_dir,
169                        ag,
170                        &ag71xx_fops_napi_stats);
171    if (!ag->debug.debugfs_napi_stats)
172        goto err;
173
174    return 0;
175
176err:
177    ag71xx_debugfs_exit(ag);
178    return -ENOMEM;
179}
180
181int ag71xx_debugfs_root_init(void)
182{
183    if (ag71xx_debugfs_root)
184        return -EBUSY;
185
186    ag71xx_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
187    if (!ag71xx_debugfs_root)
188        return -ENOENT;
189
190    return 0;
191}
192
193void ag71xx_debugfs_root_exit(void)
194{
195    debugfs_remove(ag71xx_debugfs_root);
196    ag71xx_debugfs_root = NULL;
197}
198

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