1/*
2 * Copyright (c) 2008-2011 Atheros Communications Inc.
3 * Copyright (c) 2011 Neratec Solutions AG
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18#include <linux/debugfs.h>
19#include <linux/export.h>
20
21#include "ath9k.h"
22#include "dfs_debug.h"
23
24#define ATH9K_DFS_STAT(s, p) \
25	len += snprintf(buf + len, size - len, "%28s : %10u\n", s, \
26			sc->debug.stats.dfs_stats.p);
27
28static ssize_t read_file_dfs(struct file *file, char __user *user_buf,
29			     size_t count, loff_t *ppos)
30{
31	struct ath_softc *sc = file->private_data;
32	struct ath9k_hw_version *hw_ver = &sc->sc_ah->hw_version;
33	char *buf;
34	unsigned int len = 0, size = 8000;
35	ssize_t retval = 0;
36
37	buf = kzalloc(size, GFP_KERNEL);
38	if (buf == NULL)
39		return -ENOMEM;
40
41	len += snprintf(buf + len, size - len, "DFS support for "
42			"macVersion = 0x%x, macRev = 0x%x: %s\n",
43			hw_ver->macVersion, hw_ver->macRev,
44			(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_DFS) ?
45					"enabled" : "disabled");
46	ATH9K_DFS_STAT("DFS pulses detected     ", pulses_detected);
47	ATH9K_DFS_STAT("Datalen discards        ", datalen_discards);
48	ATH9K_DFS_STAT("RSSI discards           ", rssi_discards);
49	ATH9K_DFS_STAT("BW info discards        ", bwinfo_discards);
50	ATH9K_DFS_STAT("Primary channel pulses  ", pri_phy_errors);
51	ATH9K_DFS_STAT("Secondary channel pulses", ext_phy_errors);
52	ATH9K_DFS_STAT("Dual channel pulses     ", dc_phy_errors);
53
54	if (len > size)
55		len = size;
56
57	retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
58	kfree(buf);
59
60	return retval;
61}
62
63static const struct file_operations fops_dfs_stats = {
64	.read = read_file_dfs,
65	.open = simple_open,
66	.owner = THIS_MODULE,
67	.llseek = default_llseek,
68};
69
70void ath9k_dfs_init_debug(struct ath_softc *sc)
71{
72	debugfs_create_file("dfs_stats", S_IRUSR,
73			    sc->debug.debugfs_phy, sc, &fops_dfs_stats);
74}
75