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wil6210: detailed statistics for Rx reorder drop

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Rx drops may be for 2 reasons: frame is old,
or it is duplicate. On the debugfs "stations" entry,
provide counters per reorder buffer for total
frames processed, drops for these 2 reasons.
Also add debug print for dropped frames.

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Vladimir Kondratiev 2015-07-30 13:52:01 +03:00 committed by Kalle Valo
parent 5421bf0c1e
commit 91a8edcc31
3 changed files with 19 additions and 10 deletions
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6
drivers/net/wireless/ath/wil6210/debugfs.c
View File

@ -1344,6 +1344,7 @@ static void wil_print_rxtid(struct seq_file *s, struct wil_tid_ampdu_rx *r)
{
int i;
u16 index = ((r->head_seq_num - r->ssn) & 0xfff) % r->buf_size;
unsigned long long drop_dup = r->drop_dup, drop_old = r->drop_old;
seq_printf(s, "([%2d] %3d TU) 0x%03x [", r->buf_size, r->timeout,
r->head_seq_num);
@ -1353,7 +1354,10 @@ static void wil_print_rxtid(struct seq_file *s, struct wil_tid_ampdu_rx *r)
else
seq_printf(s, "%c", r->reorder_buf[i] ? '*' : '_');
}
seq_printf(s, "] drop %llu last 0x%03x\n", r->drop, r->ssn_last_drop);
seq_printf(s,
"] total %llu drop %llu (dup %llu + old %llu) last 0x%03x\n",
r->total, drop_dup + drop_old, drop_dup, drop_old,
r->ssn_last_drop);
}
static int wil_sta_debugfs_show(struct seq_file *s, void *data)

8
drivers/net/wireless/ath/wil6210/rx_reorder.c
View File

@ -121,6 +121,7 @@ __acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
goto out;
}
r->total++;
hseq = r->head_seq_num;
/** Due to the race between WMI events, where BACK establishment
@ -153,7 +154,9 @@ __acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
/* frame with out of date sequence number */
if (seq_less(seq, r->head_seq_num)) {
r->ssn_last_drop = seq;
r->drop++;
r->drop_old++;
wil_dbg_txrx(wil, "Rx drop: old seq 0x%03x head 0x%03x\n",
seq, r->head_seq_num);
dev_kfree_skb(skb);
goto out;
}
@ -174,7 +177,8 @@ __acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
/* check if we already stored this frame */
if (r->reorder_buf[index]) {
r->drop++;
r->drop_dup++;
wil_dbg_txrx(wil, "Rx drop: dup seq 0x%03x\n", seq);
dev_kfree_skb(skb);
goto out;
}

15
drivers/net/wireless/ath/wil6210/wil6210.h
View File

@ -424,13 +424,12 @@ struct pci_dev;
* @ssn: Starting Sequence Number expected to be aggregated.
* @buf_size: buffer size for incoming A-MPDUs
* @timeout: reset timer value (in TUs).
* @ssn_last_drop: SSN of the last dropped frame
* @total: total number of processed incoming frames
* @drop_dup: duplicate frames dropped for this reorder buffer
* @drop_old: old frames dropped for this reorder buffer
* @dialog_token: dialog token for aggregation session
* @rcu_head: RCU head used for freeing this struct
* @drop: total frames dropped for this reorder buffer
*
* This structure's lifetime is managed by RCU, assignments to
* the array holding it must hold the aggregation mutex.
*
* @first_time: true when this buffer used 1-st time
*/
struct wil_tid_ampdu_rx {
struct sk_buff **reorder_buf;
@ -444,7 +443,9 @@ struct wil_tid_ampdu_rx {
u16 buf_size;
u16 timeout;
u16 ssn_last_drop;
unsigned long long drop;
unsigned long long total; /* frames processed */
unsigned long long drop_dup;
unsigned long long drop_old;
u8 dialog_token;
bool first_time; /* is it 1-st time this buffer used? */
};