OpenWrt – Blame information for rev 1
?pathlinks?
Rev | Author | Line No. | Line |
---|---|---|---|
1 | office | 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 | |||
18 | static struct dentry *ag71xx_debugfs_root; |
||
19 | |||
20 | static int ag71xx_debugfs_generic_open(struct inode *inode, struct file *file) |
||
21 | { |
||
22 | file->private_data = inode->i_private; |
||
23 | return 0; |
||
24 | } |
||
25 | |||
26 | void 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 | |||
44 | static 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 | |||
68 | static 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 | |||
74 | void 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 | |||
97 | static 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; |
||
103 | unsigned int buflen; |
||
104 | unsigned int len = 0; |
||
105 | unsigned long rx_avg = 0; |
||
106 | unsigned long tx_avg = 0; |
||
107 | int ret; |
||
108 | int i; |
||
109 | |||
110 | buflen = 2048; |
||
111 | buf = kmalloc(buflen, GFP_KERNEL); |
||
112 | if (!buf) |
||
113 | return -ENOMEM; |
||
114 | |||
115 | if (stats->rx_count) |
||
116 | rx_avg = stats->rx_packets / stats->rx_count; |
||
117 | |||
118 | if (stats->tx_count) |
||
119 | tx_avg = stats->tx_packets / stats->tx_count; |
||
120 | |||
121 | len += snprintf(buf + len, buflen - len, "%3s %10s %10s\n", |
||
122 | "len", "rx", "tx"); |
||
123 | |||
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]); |
||
128 | |||
129 | len += snprintf(buf + len, buflen - len, "\n"); |
||
130 | |||
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); |
||
139 | |||
140 | ret = simple_read_from_buffer(user_buf, count, ppos, buf, len); |
||
141 | kfree(buf); |
||
142 | |||
143 | return ret; |
||
144 | } |
||
145 | |||
146 | static const struct file_operations ag71xx_fops_napi_stats = { |
||
147 | .open = ag71xx_debugfs_generic_open, |
||
148 | .read = read_file_napi_stats, |
||
149 | .owner = THIS_MODULE |
||
150 | }; |
||
151 | |||
152 | #define DESC_PRINT_LEN 64 |
||
153 | |||
154 | static ssize_t read_file_ring(struct file *file, char __user *user_buf, |
||
155 | size_t count, loff_t *ppos, |
||
156 | struct ag71xx *ag, |
||
157 | struct ag71xx_ring *ring, |
||
158 | unsigned desc_reg) |
||
159 | { |
||
160 | int ring_size = BIT(ring->order); |
||
161 | int ring_mask = ring_size - 1; |
||
162 | char *buf; |
||
163 | unsigned int buflen; |
||
164 | unsigned int len = 0; |
||
165 | unsigned long flags; |
||
166 | ssize_t ret; |
||
167 | int curr; |
||
168 | int dirty; |
||
169 | u32 desc_hw; |
||
170 | int i; |
||
171 | |||
172 | buflen = (ring_size * DESC_PRINT_LEN); |
||
173 | buf = kmalloc(buflen, GFP_KERNEL); |
||
174 | if (!buf) |
||
175 | return -ENOMEM; |
||
176 | |||
177 | len += snprintf(buf + len, buflen - len, |
||
178 | "Idx ... %-8s %-8s %-8s %-8s .\n", |
||
179 | "desc", "next", "data", "ctrl"); |
||
180 | |||
181 | spin_lock_irqsave(&ag->lock, flags); |
||
182 | |||
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; |
||
189 | |||
190 | len += snprintf(buf + len, buflen - len, |
||
191 | "%3d %c%c%c %08x %08x %08x %08x %c\n", |
||
192 | i, |
||
193 | (i == curr) ? 'C' : ' ', |
||
194 | (i == dirty) ? 'D' : ' ', |
||
195 | (desc_hw == desc_dma) ? 'H' : ' ', |
||
196 | desc_dma, |
||
197 | desc->next, |
||
198 | desc->data, |
||
199 | desc->ctrl, |
||
200 | (desc->ctrl & DESC_EMPTY) ? 'E' : '*'); |
||
201 | } |
||
202 | |||
203 | spin_unlock_irqrestore(&ag->lock, flags); |
||
204 | |||
205 | ret = simple_read_from_buffer(user_buf, count, ppos, buf, len); |
||
206 | kfree(buf); |
||
207 | |||
208 | return ret; |
||
209 | } |
||
210 | |||
211 | static ssize_t read_file_tx_ring(struct file *file, char __user *user_buf, |
||
212 | size_t count, loff_t *ppos) |
||
213 | { |
||
214 | struct ag71xx *ag = file->private_data; |
||
215 | |||
216 | return read_file_ring(file, user_buf, count, ppos, ag, &ag->tx_ring, |
||
217 | AG71XX_REG_TX_DESC); |
||
218 | } |
||
219 | |||
220 | static const struct file_operations ag71xx_fops_tx_ring = { |
||
221 | .open = ag71xx_debugfs_generic_open, |
||
222 | .read = read_file_tx_ring, |
||
223 | .owner = THIS_MODULE |
||
224 | }; |
||
225 | |||
226 | static ssize_t read_file_rx_ring(struct file *file, char __user *user_buf, |
||
227 | size_t count, loff_t *ppos) |
||
228 | { |
||
229 | struct ag71xx *ag = file->private_data; |
||
230 | |||
231 | return read_file_ring(file, user_buf, count, ppos, ag, &ag->rx_ring, |
||
232 | AG71XX_REG_RX_DESC); |
||
233 | } |
||
234 | |||
235 | static const struct file_operations ag71xx_fops_rx_ring = { |
||
236 | .open = ag71xx_debugfs_generic_open, |
||
237 | .read = read_file_rx_ring, |
||
238 | .owner = THIS_MODULE |
||
239 | }; |
||
240 | |||
241 | void ag71xx_debugfs_exit(struct ag71xx *ag) |
||
242 | { |
||
243 | debugfs_remove_recursive(ag->debug.debugfs_dir); |
||
244 | } |
||
245 | |||
246 | int ag71xx_debugfs_init(struct ag71xx *ag) |
||
247 | { |
||
248 | struct device *dev = &ag->pdev->dev; |
||
249 | |||
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"); |
||
254 | return -ENOENT; |
||
255 | } |
||
256 | |||
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); |
||
265 | |||
266 | return 0; |
||
267 | } |
||
268 | |||
269 | int ag71xx_debugfs_root_init(void) |
||
270 | { |
||
271 | if (ag71xx_debugfs_root) |
||
272 | return -EBUSY; |
||
273 | |||
274 | ag71xx_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL); |
||
275 | if (!ag71xx_debugfs_root) |
||
276 | return -ENOENT; |
||
277 | |||
278 | return 0; |
||
279 | } |
||
280 | |||
281 | void ag71xx_debugfs_root_exit(void) |
||
282 | { |
||
283 | debugfs_remove(ag71xx_debugfs_root); |
||
284 | ag71xx_debugfs_root = NULL; |
||
285 | } |