2 * Atheros AR71xx built-in ethernet mac driver
4 * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
5 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
7 * Based on Atheros' AG7100 driver
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.
14 #include <linux/debugfs.h>
18 static struct dentry
*ag71xx_debugfs_root
;
20 static int ag71xx_debugfs_generic_open(struct inode
*inode
, struct file
*file
)
22 file
->private_data
= inode
->i_private
;
26 void ag71xx_debugfs_update_int_stats(struct ag71xx
*ag
, u32 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
++;
44 static ssize_t
read_file_int_stats(struct file
*file
, char __user
*user_buf
,
45 size_t count
, loff_t
*ppos
)
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);
51 struct ag71xx
*ag
= file
->private_data
;
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
);
64 return simple_read_from_buffer(user_buf
, count
, ppos
, buf
, len
);
68 static const struct file_operations ag71xx_fops_int_stats
= {
69 .open
= ag71xx_debugfs_generic_open
,
70 .read
= read_file_int_stats
,
74 void ag71xx_debugfs_update_napi_stats(struct ag71xx
*ag
, int rx
, int tx
)
76 struct ag71xx_napi_stats
*stats
= &ag
->debug
.napi_stats
;
80 stats
->rx_packets
+= rx
;
81 if (rx
<= AG71XX_NAPI_WEIGHT
)
83 if (rx
> stats
->rx_packets_max
)
84 stats
->rx_packets_max
= rx
;
89 stats
->tx_packets
+= tx
;
90 if (tx
<= AG71XX_NAPI_WEIGHT
)
92 if (tx
> stats
->tx_packets_max
)
93 stats
->tx_packets_max
= tx
;
97 static ssize_t
read_file_napi_stats(struct file
*file
, char __user
*user_buf
,
98 size_t count
, loff_t
*ppos
)
100 struct ag71xx
*ag
= file
->private_data
;
101 struct ag71xx_napi_stats
*stats
= &ag
->debug
.napi_stats
;
104 unsigned int len
= 0;
105 unsigned long rx_avg
= 0;
106 unsigned long tx_avg
= 0;
111 buf
= kmalloc(buflen
, GFP_KERNEL
);
116 rx_avg
= stats
->rx_packets
/ stats
->rx_count
;
119 tx_avg
= stats
->tx_packets
/ stats
->tx_count
;
121 len
+= snprintf(buf
+ len
, buflen
- len
, "%3s %10s %10s\n",
124 for (i
= 1; i
<= AG71XX_NAPI_WEIGHT
; i
++)
125 len
+= snprintf(buf
+ len
, buflen
- len
,
126 "%3d: %10lu %10lu\n",
127 i
, stats
->rx
[i
], stats
->tx
[i
]);
129 len
+= snprintf(buf
+ len
, buflen
- len
, "\n");
131 len
+= snprintf(buf
+ len
, buflen
- len
, "%3s: %10lu %10lu\n",
132 "sum", stats
->rx_count
, stats
->tx_count
);
133 len
+= snprintf(buf
+ len
, buflen
- len
, "%3s: %10lu %10lu\n",
134 "avg", rx_avg
, tx_avg
);
135 len
+= snprintf(buf
+ len
, buflen
- len
, "%3s: %10lu %10lu\n",
136 "max", stats
->rx_packets_max
, stats
->tx_packets_max
);
137 len
+= snprintf(buf
+ len
, buflen
- len
, "%3s: %10lu %10lu\n",
138 "pkt", stats
->rx_packets
, stats
->tx_packets
);
140 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, len
);
146 static const struct file_operations ag71xx_fops_napi_stats
= {
147 .open
= ag71xx_debugfs_generic_open
,
148 .read
= read_file_napi_stats
,
152 #define DESC_PRINT_LEN 64
154 static ssize_t
read_file_ring(struct file
*file
, char __user
*user_buf
,
155 size_t count
, loff_t
*ppos
,
157 struct ag71xx_ring
*ring
,
160 int ring_size
= BIT(ring
->order
);
161 int ring_mask
= ring_size
- 1;
164 unsigned int len
= 0;
172 buflen
= (ring_size
* DESC_PRINT_LEN
);
173 buf
= kmalloc(buflen
, GFP_KERNEL
);
177 len
+= snprintf(buf
+ len
, buflen
- len
,
178 "Idx ... %-8s %-8s %-8s %-8s .\n",
179 "desc", "next", "data", "ctrl");
181 spin_lock_irqsave(&ag
->lock
, flags
);
183 curr
= (ring
->curr
& ring_mask
);
184 dirty
= (ring
->dirty
& ring_mask
);
185 desc_hw
= ag71xx_rr(ag
, desc_reg
);
186 for (i
= 0; i
< ring_size
; i
++) {
187 struct ag71xx_desc
*desc
= ag71xx_ring_desc(ring
, i
);
188 u32 desc_dma
= ((u32
) ring
->descs_dma
) + i
* AG71XX_DESC_SIZE
;
190 len
+= snprintf(buf
+ len
, buflen
- len
,
191 "%3d %c%c%c %08x %08x %08x %08x %c\n",
193 (i
== curr
) ? 'C' : ' ',
194 (i
== dirty
) ? 'D' : ' ',
195 (desc_hw
== desc_dma
) ? 'H' : ' ',
200 (desc
->ctrl
& DESC_EMPTY
) ? 'E' : '*');
203 spin_unlock_irqrestore(&ag
->lock
, flags
);
205 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, len
);
211 static ssize_t
read_file_tx_ring(struct file
*file
, char __user
*user_buf
,
212 size_t count
, loff_t
*ppos
)
214 struct ag71xx
*ag
= file
->private_data
;
216 return read_file_ring(file
, user_buf
, count
, ppos
, ag
, &ag
->tx_ring
,
220 static const struct file_operations ag71xx_fops_tx_ring
= {
221 .open
= ag71xx_debugfs_generic_open
,
222 .read
= read_file_tx_ring
,
226 static ssize_t
read_file_rx_ring(struct file
*file
, char __user
*user_buf
,
227 size_t count
, loff_t
*ppos
)
229 struct ag71xx
*ag
= file
->private_data
;
231 return read_file_ring(file
, user_buf
, count
, ppos
, ag
, &ag
->rx_ring
,
235 static const struct file_operations ag71xx_fops_rx_ring
= {
236 .open
= ag71xx_debugfs_generic_open
,
237 .read
= read_file_rx_ring
,
241 void ag71xx_debugfs_exit(struct ag71xx
*ag
)
243 debugfs_remove_recursive(ag
->debug
.debugfs_dir
);
246 int ag71xx_debugfs_init(struct ag71xx
*ag
)
248 struct device
*dev
= &ag
->pdev
->dev
;
250 ag
->debug
.debugfs_dir
= debugfs_create_dir(dev_name(dev
),
251 ag71xx_debugfs_root
);
252 if (!ag
->debug
.debugfs_dir
) {
253 dev_err(dev
, "unable to create debugfs directory\n");
257 debugfs_create_file("int_stats", S_IRUGO
, ag
->debug
.debugfs_dir
,
258 ag
, &ag71xx_fops_int_stats
);
259 debugfs_create_file("napi_stats", S_IRUGO
, ag
->debug
.debugfs_dir
,
260 ag
, &ag71xx_fops_napi_stats
);
261 debugfs_create_file("tx_ring", S_IRUGO
, ag
->debug
.debugfs_dir
,
262 ag
, &ag71xx_fops_tx_ring
);
263 debugfs_create_file("rx_ring", S_IRUGO
, ag
->debug
.debugfs_dir
,
264 ag
, &ag71xx_fops_rx_ring
);
269 int ag71xx_debugfs_root_init(void)
271 if (ag71xx_debugfs_root
)
274 ag71xx_debugfs_root
= debugfs_create_dir(KBUILD_MODNAME
, NULL
);
275 if (!ag71xx_debugfs_root
)
281 void ag71xx_debugfs_root_exit(void)
283 debugfs_remove(ag71xx_debugfs_root
);
284 ag71xx_debugfs_root
= NULL
;