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_atx_ac *ac;
 30	struct ath_txq *txq;
 31	u32 len = 0, size = 4096;
 32	char *buf;
 33	size_t retval;
 34	int tidno, acno;
 35
 36	buf = kzalloc(size, GFP_KERNEL);
 37	if (buf == NULL)
 38		return -ENOMEM;
 39
 40	if (!an->sta->ht_cap.ht_supported) {
 41		len = scnprintf(buf, size, "%s\n",
 42				"HT not supported");
 43		goto exit;
 44	}
 45
 46	len = scnprintf(buf, size, "Max-AMPDU: %d\n",
 47			an->maxampdu);
 48	len += scnprintf(buf + len, size - len, "MPDU Density: %d\n\n",
 49			 an->mpdudensity);
 50
 51	len += scnprintf(buf + len, size - len,
 52			 "%2s%7s\n", "AC", "SCHED");
 53
 54	for (acno = 0, ac = &an->ac[acno];
 55	     acno < IEEE80211_NUM_ACS; acno++, ac++) {
 56		txq = ac->txq;
 57		ath_txq_lock(sc, txq);
 58		len += scnprintf(buf + len, size - len,
 59				 "%2d%7d\n",
 60				 acno, ac->sched);
 61		ath_txq_unlock(sc, txq);
 62	}
 63
 64	len += scnprintf(buf + len, size - len,
 65			 "\n%3s%11s%10s%10s%10s%10s%9s%6s%8s\n",
 66			 "TID", "SEQ_START", "SEQ_NEXT", "BAW_SIZE",
 67			 "BAW_HEAD", "BAW_TAIL", "BAR_IDX", "SCHED", "PAUSED");
 68
 69	for (tidno = 0, tid = &an->tid[tidno];
 70	     tidno < IEEE80211_NUM_TIDS; tidno++, tid++) {
 71		txq = tid->ac->txq;
 72		ath_txq_lock(sc, txq);
 73		if (tid->active) {
 74			len += scnprintf(buf + len, size - len,
 75					 "%3d%11d%10d%10d%10d%10d%9d%6d\n",
 76					 tid->tidno,
 77					 tid->seq_start,
 78					 tid->seq_next,
 79					 tid->baw_size,
 80					 tid->baw_head,
 81					 tid->baw_tail,
 82					 tid->bar_index,
 83					 tid->sched);
 84		}
 85		ath_txq_unlock(sc, txq);
 86	}
 87exit:
 88	retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
 89	kfree(buf);
 90
 91	return retval;
 92}
 93
 94static const struct file_operations fops_node_aggr = {
 95	.read = read_file_node_aggr,
 96	.open = simple_open,
 97	.owner = THIS_MODULE,
 98	.llseek = default_llseek,
 99};
100
101/*************/
102/* node_recv */
103/*************/
104
105void ath_debug_rate_stats(struct ath_softc *sc,
106			  struct ath_rx_status *rs,
107			  struct sk_buff *skb)
108{
109	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
110	struct ath_hw *ah = sc->sc_ah;
111	struct ieee80211_rx_status *rxs;
112	struct ath_rx_rate_stats *rstats;
113	struct ieee80211_sta *sta;
114	struct ath_node *an;
115
116	if (!ieee80211_is_data(hdr->frame_control))
117		return;
118
119	rcu_read_lock();
120
121	sta = ieee80211_find_sta_by_ifaddr(sc->hw, hdr->addr2, NULL);
122	if (!sta)
123		goto exit;
124
125	an = (struct ath_node *) sta->drv_priv;
126	rstats = &an->rx_rate_stats;
127	rxs = IEEE80211_SKB_RXCB(skb);
128
129	if (IS_HT_RATE(rs->rs_rate)) {
130		if (rxs->rate_idx >= ARRAY_SIZE(rstats->ht_stats))
131			goto exit;
132
133		if (rxs->flag & RX_FLAG_40MHZ)
134			rstats->ht_stats[rxs->rate_idx].ht40_cnt++;
135		else
136			rstats->ht_stats[rxs->rate_idx].ht20_cnt++;
137
138		if (rxs->flag & RX_FLAG_SHORT_GI)
139			rstats->ht_stats[rxs->rate_idx].sgi_cnt++;
140		else
141			rstats->ht_stats[rxs->rate_idx].lgi_cnt++;
142
143		goto exit;
144	}
145
146	if (IS_CCK_RATE(rs->rs_rate)) {
147		if (rxs->flag & RX_FLAG_SHORTPRE)
148			rstats->cck_stats[rxs->rate_idx].cck_sp_cnt++;
149		else
150			rstats->cck_stats[rxs->rate_idx].cck_lp_cnt++;
151
152		goto exit;
153	}
154
155	if (IS_OFDM_RATE(rs->rs_rate)) {
156		if (ah->curchan->chan->band == IEEE80211_BAND_2GHZ)
157			rstats->ofdm_stats[rxs->rate_idx - 4].ofdm_cnt++;
158		else
159			rstats->ofdm_stats[rxs->rate_idx].ofdm_cnt++;
160	}
161exit:
162	rcu_read_unlock();
163}
164
165#define PRINT_CCK_RATE(str, i, sp)					\
166	do {								\
167		len += scnprintf(buf + len, size - len,			\
168			 "%11s : %10u\n",				\
169			 str,						\
170			 (sp) ? rstats->cck_stats[i].cck_sp_cnt :	\
171			 rstats->cck_stats[i].cck_lp_cnt);		\
172	} while (0)
173
174#define PRINT_OFDM_RATE(str, i)					\
175	do {							\
176		len += scnprintf(buf + len, size - len,		\
177			 "%11s : %10u\n",			\
178			 str,					\
179			 rstats->ofdm_stats[i].ofdm_cnt);	\
180	} while (0)
181
182static ssize_t read_file_node_recv(struct file *file, char __user *user_buf,
183				   size_t count, loff_t *ppos)
184{
185	struct ath_node *an = file->private_data;
186	struct ath_softc *sc = an->sc;
187	struct ath_hw *ah = sc->sc_ah;
188	struct ath_rx_rate_stats *rstats;
189	struct ieee80211_sta *sta = an->sta;
190	enum ieee80211_band band;
191	u32 len = 0, size = 4096;
192	char *buf;
193	size_t retval;
194	int i;
195
196	buf = kzalloc(size, GFP_KERNEL);
197	if (buf == NULL)
198		return -ENOMEM;
199
200	band = ah->curchan->chan->band;
201	rstats = &an->rx_rate_stats;
202
203	if (!sta->ht_cap.ht_supported)
204		goto legacy;
205
206	len += scnprintf(buf + len, size - len,
207			 "%24s%10s%10s%10s\n",
208			 "HT20", "HT40", "SGI", "LGI");
209
210	for (i = 0; i < 24; i++) {
211		len += scnprintf(buf + len, size - len,
212				 "%8s%3u : %10u%10u%10u%10u\n",
213				 "MCS", i,
214				 rstats->ht_stats[i].ht20_cnt,
215				 rstats->ht_stats[i].ht40_cnt,
216				 rstats->ht_stats[i].sgi_cnt,
217				 rstats->ht_stats[i].lgi_cnt);
218	}
219
220	len += scnprintf(buf + len, size - len, "\n");
221
222legacy:
223	if (band == IEEE80211_BAND_2GHZ) {
224		PRINT_CCK_RATE("CCK-1M/LP", 0, false);
225		PRINT_CCK_RATE("CCK-2M/LP", 1, false);
226		PRINT_CCK_RATE("CCK-5.5M/LP", 2, false);
227		PRINT_CCK_RATE("CCK-11M/LP", 3, false);
228
229		PRINT_CCK_RATE("CCK-2M/SP", 1, true);
230		PRINT_CCK_RATE("CCK-5.5M/SP", 2, true);
231		PRINT_CCK_RATE("CCK-11M/SP", 3, true);
232	}
233
234	PRINT_OFDM_RATE("OFDM-6M", 0);
235	PRINT_OFDM_RATE("OFDM-9M", 1);
236	PRINT_OFDM_RATE("OFDM-12M", 2);
237	PRINT_OFDM_RATE("OFDM-18M", 3);
238	PRINT_OFDM_RATE("OFDM-24M", 4);
239	PRINT_OFDM_RATE("OFDM-36M", 5);
240	PRINT_OFDM_RATE("OFDM-48M", 6);
241	PRINT_OFDM_RATE("OFDM-54M", 7);
242
243	retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
244	kfree(buf);
245
246	return retval;
247}
248
249#undef PRINT_OFDM_RATE
250#undef PRINT_CCK_RATE
251
252static const struct file_operations fops_node_recv = {
253	.read = read_file_node_recv,
254	.open = simple_open,
255	.owner = THIS_MODULE,
256	.llseek = default_llseek,
257};
258
259void ath9k_sta_add_debugfs(struct ieee80211_hw *hw,
260			   struct ieee80211_vif *vif,
261			   struct ieee80211_sta *sta,
262			   struct dentry *dir)
263{
264	struct ath_node *an = (struct ath_node *)sta->drv_priv;
265
266	debugfs_create_file("node_aggr", S_IRUGO, dir, an, &fops_node_aggr);
267	debugfs_create_file("node_recv", S_IRUGO, dir, an, &fops_node_recv);
268}