drivers/net/wireless/ath/ath9k/debug_sta.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/ath/ath9k/debug_sta.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/ath/ath9k/debug_sta.c
Extension
.c
Size
6563 bytes
Lines
255
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: operation-table or driver-model contract
Status
pattern implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

static const struct file_operations fops_node_aggr = {
	.read = read_file_node_aggr,
	.open = simple_open,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

/*************/
/* node_recv */
/*************/

void ath_debug_rate_stats(struct ath_softc *sc,
			  struct ath_rx_status *rs,
			  struct sk_buff *skb)
{
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
	struct ath_hw *ah = sc->sc_ah;
	struct ieee80211_rx_status *rxs;
	struct ath_rx_rate_stats *rstats;
	struct ieee80211_sta *sta;
	struct ath_node *an;

	if (!ieee80211_is_data(hdr->frame_control))
		return;

	rcu_read_lock();

	sta = ieee80211_find_sta_by_ifaddr(sc->hw, hdr->addr2, NULL);
	if (!sta)
		goto exit;

	an = (struct ath_node *) sta->drv_priv;
	rstats = &an->rx_rate_stats;
	rxs = IEEE80211_SKB_RXCB(skb);

	if (IS_HT_RATE(rs->rs_rate)) {
		if (rxs->rate_idx >= ARRAY_SIZE(rstats->ht_stats))
			goto exit;

		if (rxs->bw == RATE_INFO_BW_40)
			rstats->ht_stats[rxs->rate_idx].ht40_cnt++;
		else
			rstats->ht_stats[rxs->rate_idx].ht20_cnt++;

		if (rxs->enc_flags & RX_ENC_FLAG_SHORT_GI)
			rstats->ht_stats[rxs->rate_idx].sgi_cnt++;
		else
			rstats->ht_stats[rxs->rate_idx].lgi_cnt++;

		goto exit;
	}

	if (IS_CCK_RATE(rs->rs_rate)) {
		if (rxs->enc_flags & RX_ENC_FLAG_SHORTPRE)
			rstats->cck_stats[rxs->rate_idx].cck_sp_cnt++;
		else
			rstats->cck_stats[rxs->rate_idx].cck_lp_cnt++;

		goto exit;
	}

	if (IS_OFDM_RATE(rs->rs_rate)) {
		if (ah->curchan->chan->band == NL80211_BAND_2GHZ)
			rstats->ofdm_stats[rxs->rate_idx - 4].ofdm_cnt++;
		else
			rstats->ofdm_stats[rxs->rate_idx].ofdm_cnt++;
	}
exit:
	rcu_read_unlock();
}

#define PRINT_CCK_RATE(str, i, sp)					\
	do {								\
		len += scnprintf(buf + len, size - len,			\
			 "%11s : %10u\n",				\
			 str,						\
			 (sp) ? rstats->cck_stats[i].cck_sp_cnt :	\
			 rstats->cck_stats[i].cck_lp_cnt);		\
	} while (0)

#define PRINT_OFDM_RATE(str, i)					\
	do {							\
		len += scnprintf(buf + len, size - len,		\
			 "%11s : %10u\n",			\
			 str,					\
			 rstats->ofdm_stats[i].ofdm_cnt);	\
	} while (0)

static ssize_t read_file_node_recv(struct file *file, char __user *user_buf,
				   size_t count, loff_t *ppos)

Annotation

Implementation Notes