From 91a8edcc3173958fd8102343a8a7919a7b703ef0 Mon Sep 17 00:00:00 2001 From: Vladimir Kondratiev Date: Thu, 30 Jul 2015 13:52:01 +0300 Subject: [PATCH] wil6210: detailed statistics for Rx reorder drop 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 Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/wil6210/debugfs.c | 6 +++++- drivers/net/wireless/ath/wil6210/rx_reorder.c | 8 ++++++-- drivers/net/wireless/ath/wil6210/wil6210.h | 15 ++++++++------- 3 files changed, 19 insertions(+), 10 deletions(-) diff --git a/drivers/net/wireless/ath/wil6210/debugfs.c b/drivers/net/wireless/ath/wil6210/debugfs.c index 2651ec4fb620..05b550f32914 100644 --- a/drivers/net/wireless/ath/wil6210/debugfs.c +++ b/drivers/net/wireless/ath/wil6210/debugfs.c @@ -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) diff --git a/drivers/net/wireless/ath/wil6210/rx_reorder.c b/drivers/net/wireless/ath/wil6210/rx_reorder.c index e4ac11cf0f50..9238c1ac23dd 100644 --- a/drivers/net/wireless/ath/wil6210/rx_reorder.c +++ b/drivers/net/wireless/ath/wil6210/rx_reorder.c @@ -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tid_rx_lock) /* frame with out of date sequence number */ if (seq_less(seq, r-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; } diff --git a/drivers/net/wireless/ath/wil6210/wil6210.h b/drivers/net/wireless/ath/wil6210/wil6210.h index 54f16732d226..c72272449652 100644 --- a/drivers/net/wireless/ath/wil6210/wil6210.h +++ b/drivers/net/wireless/ath/wil6210/wil6210.h @@ -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? */ }; -- 2.20.1