1/*
2 * Copyright (c) 2013 Qualcomm Atheros, Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#include "ath9k.h"
18
19/*************/
20/* node_aggr */
21/*************/
22
23static ssize_t read_file_node_aggr(struct file *file, char __user *user_buf,
24 size_t count, loff_t *ppos)
25{
26 struct ath_node *an = file->private_data;
27 struct ath_softc *sc = an->sc;
28 struct ath_atx_tid *tid;
29 struct ath_txq *txq;
30 u32 len = 0, size = 4096;
31 char *buf;
32 size_t retval;
33 int tidno;
34
35 buf = kzalloc(size, GFP_KERNEL);
36 if (buf == NULL)
37 return -ENOMEM;
38
39 if (!an->sta->deflink.ht_cap.ht_supported) {
40 len = scnprintf(buf, size, fmt: "%s\n",
41 "HT not supported");
42 goto exit;
43 }
44
45 len = scnprintf(buf, size, fmt: "Max-AMPDU: %d\n",
46 an->maxampdu);
47 len += scnprintf(buf: buf + len, size: size - len, fmt: "MPDU Density: %d\n\n",
48 an->mpdudensity);
49
50 len += scnprintf(buf: buf + len, size: size - len,
51 fmt: "\n%3s%11s%10s%10s%10s%10s%9s%6s%8s\n",
52 "TID", "SEQ_START", "SEQ_NEXT", "BAW_SIZE",
53 "BAW_HEAD", "BAW_TAIL", "BAR_IDX", "SCHED", "PAUSED");
54
55 for (tidno = 0; tidno < IEEE80211_NUM_TIDS; tidno++) {
56 tid = ath_node_to_tid(an, tidno);
57 txq = tid->txq;
58 ath_txq_lock(sc, txq);
59 if (tid->active) {
60 len += scnprintf(buf: buf + len, size: size - len,
61 fmt: "%3d%11d%10d%10d%10d%10d%9d%6d\n",
62 tid->tidno,
63 tid->seq_start,
64 tid->seq_next,
65 tid->baw_size,
66 tid->baw_head,
67 tid->baw_tail,
68 tid->bar_index,
69 !list_empty(head: &tid->list));
70 }
71 ath_txq_unlock(sc, txq);
72 }
73exit:
74 retval = simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: len);
75 kfree(objp: buf);
76
77 return retval;
78}
79
80static const struct file_operations fops_node_aggr = {
81 .read = read_file_node_aggr,
82 .open = simple_open,
83 .owner = THIS_MODULE,
84 .llseek = default_llseek,
85};
86
87/*************/
88/* node_recv */
89/*************/
90
91void ath_debug_rate_stats(struct ath_softc *sc,
92 struct ath_rx_status *rs,
93 struct sk_buff *skb)
94{
95 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
96 struct ath_hw *ah = sc->sc_ah;
97 struct ieee80211_rx_status *rxs;
98 struct ath_rx_rate_stats *rstats;
99 struct ieee80211_sta *sta;
100 struct ath_node *an;
101
102 if (!ieee80211_is_data(fc: hdr->frame_control))
103 return;
104
105 rcu_read_lock();
106
107 sta = ieee80211_find_sta_by_ifaddr(hw: sc->hw, addr: hdr->addr2, NULL);
108 if (!sta)
109 goto exit;
110
111 an = (struct ath_node *) sta->drv_priv;
112 rstats = &an->rx_rate_stats;
113 rxs = IEEE80211_SKB_RXCB(skb);
114
115 if (IS_HT_RATE(rs->rs_rate)) {
116 if (rxs->rate_idx >= ARRAY_SIZE(rstats->ht_stats))
117 goto exit;
118
119 if (rxs->bw == RATE_INFO_BW_40)
120 rstats->ht_stats[rxs->rate_idx].ht40_cnt++;
121 else
122 rstats->ht_stats[rxs->rate_idx].ht20_cnt++;
123
124 if (rxs->enc_flags & RX_ENC_FLAG_SHORT_GI)
125 rstats->ht_stats[rxs->rate_idx].sgi_cnt++;
126 else
127 rstats->ht_stats[rxs->rate_idx].lgi_cnt++;
128
129 goto exit;
130 }
131
132 if (IS_CCK_RATE(rs->rs_rate)) {
133 if (rxs->enc_flags & RX_ENC_FLAG_SHORTPRE)
134 rstats->cck_stats[rxs->rate_idx].cck_sp_cnt++;
135 else
136 rstats->cck_stats[rxs->rate_idx].cck_lp_cnt++;
137
138 goto exit;
139 }
140
141 if (IS_OFDM_RATE(rs->rs_rate)) {
142 if (ah->curchan->chan->band == NL80211_BAND_2GHZ)
143 rstats->ofdm_stats[rxs->rate_idx - 4].ofdm_cnt++;
144 else
145 rstats->ofdm_stats[rxs->rate_idx].ofdm_cnt++;
146 }
147exit:
148 rcu_read_unlock();
149}
150
151#define PRINT_CCK_RATE(str, i, sp) \
152 do { \
153 len += scnprintf(buf + len, size - len, \
154 "%11s : %10u\n", \
155 str, \
156 (sp) ? rstats->cck_stats[i].cck_sp_cnt : \
157 rstats->cck_stats[i].cck_lp_cnt); \
158 } while (0)
159
160#define PRINT_OFDM_RATE(str, i) \
161 do { \
162 len += scnprintf(buf + len, size - len, \
163 "%11s : %10u\n", \
164 str, \
165 rstats->ofdm_stats[i].ofdm_cnt); \
166 } while (0)
167
168static ssize_t read_file_node_recv(struct file *file, char __user *user_buf,
169 size_t count, loff_t *ppos)
170{
171 struct ath_node *an = file->private_data;
172 struct ath_softc *sc = an->sc;
173 struct ath_hw *ah = sc->sc_ah;
174 struct ath_rx_rate_stats *rstats;
175 struct ieee80211_sta *sta = an->sta;
176 enum nl80211_band band;
177 u32 len = 0, size = 4096;
178 char *buf;
179 size_t retval;
180 int i;
181
182 buf = kzalloc(size, GFP_KERNEL);
183 if (buf == NULL)
184 return -ENOMEM;
185
186 band = ah->curchan->chan->band;
187 rstats = &an->rx_rate_stats;
188
189 if (!sta->deflink.ht_cap.ht_supported)
190 goto legacy;
191
192 len += scnprintf(buf: buf + len, size: size - len,
193 fmt: "%24s%10s%10s%10s\n",
194 "HT20", "HT40", "SGI", "LGI");
195
196 for (i = 0; i < 24; i++) {
197 len += scnprintf(buf: buf + len, size: size - len,
198 fmt: "%8s%3u : %10u%10u%10u%10u\n",
199 "MCS", i,
200 rstats->ht_stats[i].ht20_cnt,
201 rstats->ht_stats[i].ht40_cnt,
202 rstats->ht_stats[i].sgi_cnt,
203 rstats->ht_stats[i].lgi_cnt);
204 }
205
206 len += scnprintf(buf: buf + len, size: size - len, fmt: "\n");
207
208legacy:
209 if (band == NL80211_BAND_2GHZ) {
210 PRINT_CCK_RATE("CCK-1M/LP", 0, false);
211 PRINT_CCK_RATE("CCK-2M/LP", 1, false);
212 PRINT_CCK_RATE("CCK-5.5M/LP", 2, false);
213 PRINT_CCK_RATE("CCK-11M/LP", 3, false);
214
215 PRINT_CCK_RATE("CCK-2M/SP", 1, true);
216 PRINT_CCK_RATE("CCK-5.5M/SP", 2, true);
217 PRINT_CCK_RATE("CCK-11M/SP", 3, true);
218 }
219
220 PRINT_OFDM_RATE("OFDM-6M", 0);
221 PRINT_OFDM_RATE("OFDM-9M", 1);
222 PRINT_OFDM_RATE("OFDM-12M", 2);
223 PRINT_OFDM_RATE("OFDM-18M", 3);
224 PRINT_OFDM_RATE("OFDM-24M", 4);
225 PRINT_OFDM_RATE("OFDM-36M", 5);
226 PRINT_OFDM_RATE("OFDM-48M", 6);
227 PRINT_OFDM_RATE("OFDM-54M", 7);
228
229 retval = simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: len);
230 kfree(objp: buf);
231
232 return retval;
233}
234
235#undef PRINT_OFDM_RATE
236#undef PRINT_CCK_RATE
237
238static const struct file_operations fops_node_recv = {
239 .read = read_file_node_recv,
240 .open = simple_open,
241 .owner = THIS_MODULE,
242 .llseek = default_llseek,
243};
244
245void ath9k_sta_add_debugfs(struct ieee80211_hw *hw,
246 struct ieee80211_vif *vif,
247 struct ieee80211_sta *sta,
248 struct dentry *dir)
249{
250 struct ath_node *an = (struct ath_node *)sta->drv_priv;
251
252 debugfs_create_file("node_aggr", 0444, dir, an, &fops_node_aggr);
253 debugfs_create_file("node_recv", 0444, dir, an, &fops_node_recv);
254}
255

source code of linux/drivers/net/wireless/ath/ath9k/debug_sta.c