From: Ben Greear <greearb@xxxxxxxxxxxxxxx>
Should help debug strange tx lockup type issues.
Signed-off-by: Ben Greear <greearb@xxxxxxxxxxxxxxx>
---
:100644 100644 5075faa... 577bc5a... M drivers/net/wireless/ath/ath9k/debug.c
:100644 100644 1e5078b... cd2db3f... M drivers/net/wireless/ath/ath9k/debug.h
:100644 100644 180170d... 99ce6f1... M drivers/net/wireless/ath/ath9k/mac.c
:100644 100644 332d1fe... c769037... M drivers/net/wireless/ath/ath9k/xmit.c
drivers/net/wireless/ath/ath9k/debug.c | 29 +++++++++++++++++++++++++++--
drivers/net/wireless/ath/ath9k/debug.h | 6 ++++++
drivers/net/wireless/ath/ath9k/mac.c | 8 ++++++++
drivers/net/wireless/ath/ath9k/xmit.c | 1 +
4 files changed, 42 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c
index 5075faa..577bc5a 100644
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -599,13 +599,25 @@ do { \
(unsigned int)(sc->tx.txq[WME_AC_VO].elem)); \
} while(0)
+#define PRQLE(str, elem) \
+do { \
+ len += snprintf(buf + len, size - len, \
+ "%s%13i%11i%10i%10i\n", str, \
+ list_empty(&sc->tx.txq[WME_AC_BE].elem), \
+ list_empty(&sc->tx.txq[WME_AC_BK].elem), \
+ list_empty(&sc->tx.txq[WME_AC_VI].elem), \
+ list_empty(&sc->tx.txq[WME_AC_VO].elem)); \
+} while (0)
+
static ssize_t read_file_xmit(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
char *buf;
- unsigned int len = 0, size = 2048;
+ unsigned int len = 0, size = 4000;
+ int i;
ssize_t retval = 0;
+ char tmp[32];
buf = kzalloc(size, GFP_KERNEL);
if (buf == NULL)
@@ -628,13 +640,26 @@ static ssize_t read_file_xmit(struct file *file, char __user *user_buf,
PR("DELIM Underrun: ", delim_underrun);
PR("TX-Pkts-All: ", tx_pkts_all);
PR("TX-Bytes-All: ", tx_bytes_all);
+ PR("hw-put-tx-buf: ", puttxbuf);
+ PR("hw-tx-start: ", txstart);
+ PR("hw-tx-proc-desc: ", txprocdesc);
PRX("axq-qnum: ", axq_qnum);
PRX("axq-depth: ", axq_depth);
+ PRX("axq-ampdu_depth: ", axq_ampdu_depth);
PRX("axq-stopped ", stopped);
PRX("tx-in-progress ", axq_tx_inprogress);
PRX("pending-frames ", pending_frames);
-
+ PRX("txq_headidx: ", txq_headidx);
+ PRX("txq_tailidx: ", txq_headidx);
+
+ PRQLE("axq_q empty: ", axq_q);
+ PRQLE("axq_acq empty: ", axq_acq);
+ PRQLE("txq_fifo_pending: ", txq_fifo_pending);
+ for (i = 0; i < ATH_TXFIFO_DEPTH; i++) {
+ snprintf(tmp, sizeof(tmp) - 1, "txq_fifo[%i] empty: ", i);
+ PRQLE(tmp, txq_fifo[i]);
+ }
if (len > size)
len = size;
diff --git a/drivers/net/wireless/ath/ath9k/debug.h b/drivers/net/wireless/ath/ath9k/debug.h
index 1e5078b..cd2db3f 100644
--- a/drivers/net/wireless/ath/ath9k/debug.h
+++ b/drivers/net/wireless/ath/ath9k/debug.h
@@ -102,6 +102,9 @@ struct ath_interrupt_stats {
* @desc_cfg_err: Descriptor configuration errors
* @data_urn: TX data underrun errors
* @delim_urn: TX delimiter underrun errors
+ * @puttxbuf: Number of times hardware was given txbuf to write.
+ * @txstart: Number of times hardware was told to start tx.
+ * @txprocdesc: Number of times tx descriptor was processed
*/
struct ath_tx_stats {
u32 tx_pkts_all;
@@ -119,6 +122,9 @@ struct ath_tx_stats {
u32 desc_cfg_err;
u32 data_underrun;
u32 delim_underrun;
+ u32 puttxbuf;
+ u32 txstart;
+ u32 txprocdesc;
};
/**
diff --git a/drivers/net/wireless/ath/ath9k/mac.c b/drivers/net/wireless/ath/ath9k/mac.c
index 180170d..99ce6f1 100644
--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -16,6 +16,8 @@
#include "hw.h"
#include "hw-ops.h"
+#include "debug.h"
+#include "ath9k.h"
static void ath9k_hw_set_txq_interrupts(struct ath_hw *ah,
struct ath9k_tx_queue_info *qi)
@@ -50,12 +52,18 @@ EXPORT_SYMBOL(ath9k_hw_gettxbuf);
void ath9k_hw_puttxbuf(struct ath_hw *ah, u32 q, u32 txdp)
{
+ struct ath_wiphy *aphy = ah->hw->priv;
+ struct ath_softc *sc = aphy->sc;
+ TX_STAT_INC(q, puttxbuf);
REG_WRITE(ah, AR_QTXDP(q), txdp);
}
EXPORT_SYMBOL(ath9k_hw_puttxbuf);
void ath9k_hw_txstart(struct ath_hw *ah, u32 q)
{
+ struct ath_wiphy *aphy = ah->hw->priv;
+ struct ath_softc *sc = aphy->sc;
+ TX_STAT_INC(q, txstart);
ath_dbg(ath9k_hw_common(ah), ATH_DBG_QUEUE,
"Enable TXE on queue: %u\n", q);
REG_WRITE(ah, AR_Q_TXE, 1 << q);
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 332d1fe..c769037 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -2033,6 +2033,7 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
spin_unlock_bh(&txq->axq_lock);
break;
}
+ TX_STAT_INC(txq->axq_qnum, txprocdesc);
/*
* Remove ath_buf's of the same transmit unit from txq,
--
1.7.2.3
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
