Commit 81a3de1c authored by Emmanuel Grumbach's avatar Emmanuel Grumbach Committed by John W. Linville
Browse files

iwlwifi: add debug information on queue stop / wake



Users complain that the traffic gets stalled sometimes. This will
allow easier debugging.
Signed-off-by: default avatarEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: default avatarWey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 0dcf50ca
......@@ -800,7 +800,8 @@ static void iwlagn_pass_packet_to_mac80211(struct iwl_priv *priv,
ctx->active.bssid_addr))
continue;
ctx->last_tx_rejected = false;
iwl_trans_wake_any_queue(trans(priv), ctx->ctxid);
iwl_trans_wake_any_queue(trans(priv), ctx->ctxid,
"channel got active");
}
}
......
......@@ -844,7 +844,8 @@ void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
if (ctx->last_tx_rejected) {
ctx->last_tx_rejected = false;
iwl_trans_wake_any_queue(trans(priv),
ctx->ctxid);
ctx->ctxid,
"Disassoc: flush queue");
}
ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
......
......@@ -813,7 +813,8 @@ int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
iwl_is_associated_ctx(ctx) && ctx->vif &&
ctx->vif->type == NL80211_IFTYPE_STATION) {
ctx->last_tx_rejected = true;
iwl_trans_stop_queue(trans(priv), txq_id);
iwl_trans_stop_queue(trans(priv), txq_id,
"Tx on passive channel");
IWL_DEBUG_TX_REPLY(priv,
"TXQ %d status %s (0x%08x) "
......
......@@ -166,7 +166,7 @@ static inline void iwl_dbgfs_unregister(struct iwl_priv *priv)
#define IWL_DL_11H (1 << 28)
#define IWL_DL_STATS (1 << 29)
#define IWL_DL_TX_REPLY (1 << 30)
#define IWL_DL_UNUSED (1 << 31)
#define IWL_DL_TX_QUEUES (1 << 31)
#define IWL_DEBUG_INFO(p, f, a...) IWL_DEBUG(p, IWL_DL_INFO, f, ## a)
#define IWL_DEBUG_MAC80211(p, f, a...) IWL_DEBUG(p, IWL_DL_MAC80211, f, ## a)
......@@ -203,7 +203,7 @@ static inline void iwl_dbgfs_unregister(struct iwl_priv *priv)
#define IWL_DEBUG_TX_REPLY(p, f, a...) IWL_DEBUG(p, IWL_DL_TX_REPLY, f, ## a)
#define IWL_DEBUG_TX_REPLY_LIMIT(p, f, a...) \
IWL_DEBUG_LIMIT(p, IWL_DL_TX_REPLY, f, ## a)
#define IWL_DEBUG_UNUSED(p, f, a...) IWL_DEBUG(p, IWL_DL_UNUSED, f, ## a)
#define IWL_DEBUG_TX_QUEUES(p, f, a...) IWL_DEBUG(p, IWL_DL_TX_QUEUES, f, ## a)
#define IWL_DEBUG_RADIO(p, f, a...) IWL_DEBUG(p, IWL_DL_RADIO, f, ## a)
#define IWL_DEBUG_POWER(p, f, a...) IWL_DEBUG(p, IWL_DL_POWER, f, ## a)
#define IWL_DEBUG_11H(p, f, a...) IWL_DEBUG(p, IWL_DL_11H, f, ## a)
......
......@@ -355,7 +355,7 @@ static inline void iwl_set_swq_id(struct iwl_tx_queue *txq, u8 ac, u8 hwq)
}
static inline void iwl_wake_queue(struct iwl_trans *trans,
struct iwl_tx_queue *txq)
struct iwl_tx_queue *txq, const char *msg)
{
u8 queue = txq->swq_id;
u8 ac = queue & 3;
......@@ -363,13 +363,22 @@ static inline void iwl_wake_queue(struct iwl_trans *trans,
struct iwl_trans_pcie *trans_pcie =
IWL_TRANS_GET_PCIE_TRANS(trans);
if (test_and_clear_bit(hwq, trans_pcie->queue_stopped))
if (atomic_dec_return(&trans_pcie->queue_stop_count[ac]) <= 0)
if (test_and_clear_bit(hwq, trans_pcie->queue_stopped)) {
if (atomic_dec_return(&trans_pcie->queue_stop_count[ac]) <= 0) {
iwl_wake_sw_queue(priv(trans), ac);
IWL_DEBUG_TX_QUEUES(trans, "Wake hwq %d ac %d. %s",
hwq, ac, msg);
} else {
IWL_DEBUG_TX_QUEUES(trans, "Don't wake hwq %d ac %d"
" stop count %d. %s",
hwq, ac, atomic_read(&trans_pcie->
queue_stop_count[ac]), msg);
}
}
}
static inline void iwl_stop_queue(struct iwl_trans *trans,
struct iwl_tx_queue *txq)
struct iwl_tx_queue *txq, const char *msg)
{
u8 queue = txq->swq_id;
u8 ac = queue & 3;
......@@ -377,9 +386,23 @@ static inline void iwl_stop_queue(struct iwl_trans *trans,
struct iwl_trans_pcie *trans_pcie =
IWL_TRANS_GET_PCIE_TRANS(trans);
if (!test_and_set_bit(hwq, trans_pcie->queue_stopped))
if (atomic_inc_return(&trans_pcie->queue_stop_count[ac]) > 0)
if (!test_and_set_bit(hwq, trans_pcie->queue_stopped)) {
if (atomic_inc_return(&trans_pcie->queue_stop_count[ac]) > 0) {
iwl_stop_sw_queue(priv(trans), ac);
IWL_DEBUG_TX_QUEUES(trans, "Stop hwq %d ac %d"
" stop count %d. %s",
hwq, ac, atomic_read(&trans_pcie->
queue_stop_count[ac]), msg);
} else {
IWL_DEBUG_TX_QUEUES(trans, "Don't stop hwq %d ac %d"
" stop count %d. %s",
hwq, ac, atomic_read(&trans_pcie->
queue_stop_count[ac]), msg);
}
} else {
IWL_DEBUG_TX_QUEUES(trans, "stop hwq %d, but it is stopped/ %s",
hwq, msg);
}
}
#ifdef ieee80211_stop_queue
......
......@@ -430,7 +430,7 @@ void iwl_trans_tx_queue_set_status(struct iwl_trans *trans,
txq->sched_retry = scd_retry;
IWL_DEBUG_INFO(trans, "%s %s Queue %d on FIFO %d\n",
IWL_DEBUG_TX_QUEUES(trans, "%s %s Queue %d on FIFO %d\n",
active ? "Activate" : "Deactivate",
scd_retry ? "BA" : "AC/CMD", txq_id, tx_fifo_id);
}
......@@ -561,12 +561,13 @@ int iwl_trans_pcie_tx_agg_alloc(struct iwl_trans *trans,
tid_data = &trans->shrd->tid_data[sta_id][tid];
if (tid_data->tfds_in_queue == 0) {
IWL_DEBUG_HT(trans, "HW queue is empty\n");
IWL_DEBUG_TX_QUEUES(trans, "HW queue is empty\n");
tid_data->agg.state = IWL_AGG_ON;
iwl_start_tx_ba_trans_ready(priv(trans), ctx, sta_id, tid);
} else {
IWL_DEBUG_HT(trans, "HW queue is NOT empty: %d packets in HW"
"queue\n", tid_data->tfds_in_queue);
IWL_DEBUG_TX_QUEUES(trans,
"HW queue is NOT empty: %d packets in HW"
" queue\n", tid_data->tfds_in_queue);
tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
}
spin_unlock_irqrestore(&trans->shrd->sta_lock, flags);
......@@ -643,14 +644,15 @@ int iwl_trans_pcie_tx_agg_disable(struct iwl_trans *trans,
/* The queue is not empty */
if (write_ptr != read_ptr) {
IWL_DEBUG_HT(trans, "Stopping a non empty AGG HW QUEUE\n");
IWL_DEBUG_TX_QUEUES(trans,
"Stopping a non empty AGG HW QUEUE\n");
trans->shrd->tid_data[sta_id][tid].agg.state =
IWL_EMPTYING_HW_QUEUE_DELBA;
spin_unlock_irqrestore(&trans->shrd->sta_lock, flags);
return 0;
}
IWL_DEBUG_HT(trans, "HW queue is empty\n");
IWL_DEBUG_TX_QUEUES(trans, "HW queue is empty\n");
turn_off:
trans->shrd->tid_data[sta_id][tid].agg.state = IWL_AGG_OFF;
......
......@@ -1231,7 +1231,7 @@ static int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
txq->need_update = 1;
iwl_txq_update_write_ptr(trans, txq);
} else {
iwl_stop_queue(trans, txq);
iwl_stop_queue(trans, txq, "Queue is full");
}
}
return 0;
......@@ -1283,20 +1283,21 @@ static int iwlagn_txq_check_empty(struct iwl_trans *trans,
/* aggregated HW queue */
if ((txq_id == tid_data->agg.txq_id) &&
(q->read_ptr == q->write_ptr)) {
IWL_DEBUG_HT(trans,
IWL_DEBUG_TX_QUEUES(trans,
"HW queue empty: continue DELBA flow\n");
iwl_trans_pcie_txq_agg_disable(trans, txq_id);
tid_data->agg.state = IWL_AGG_OFF;
iwl_stop_tx_ba_trans_ready(priv(trans),
NUM_IWL_RXON_CTX,
sta_id, tid);
iwl_wake_queue(trans, &trans_pcie->txq[txq_id]);
iwl_wake_queue(trans, &trans_pcie->txq[txq_id],
"DELBA flow complete");
}
break;
case IWL_EMPTYING_HW_QUEUE_ADDBA:
/* We are reclaiming the last packet of the queue */
if (tid_data->tfds_in_queue == 0) {
IWL_DEBUG_HT(trans,
IWL_DEBUG_TX_QUEUES(trans,
"HW queue empty: continue ADDBA flow\n");
tid_data->agg.state = IWL_AGG_ON;
iwl_start_tx_ba_trans_ready(priv(trans),
......@@ -1354,7 +1355,7 @@ static void iwl_trans_pcie_reclaim(struct iwl_trans *trans, int sta_id, int tid,
ssn , tfd_num, txq_id, txq->swq_id);
freed = iwl_tx_queue_reclaim(trans, txq_id, tfd_num, skbs);
if (iwl_queue_space(&txq->q) > txq->q.low_mark && cond)
iwl_wake_queue(trans, txq);
iwl_wake_queue(trans, txq, "Packets reclaimed");
}
iwl_free_tfds_in_queue(trans, sta_id, tid, freed);
......@@ -1418,7 +1419,8 @@ static int iwl_trans_pcie_resume(struct iwl_trans *trans)
#endif /* CONFIG_PM_SLEEP */
static void iwl_trans_pcie_wake_any_queue(struct iwl_trans *trans,
enum iwl_rxon_context_id ctx)
enum iwl_rxon_context_id ctx,
const char *msg)
{
u8 ac, txq_id;
struct iwl_trans_pcie *trans_pcie =
......@@ -1426,11 +1428,11 @@ static void iwl_trans_pcie_wake_any_queue(struct iwl_trans *trans,
for (ac = 0; ac < AC_NUM; ac++) {
txq_id = trans_pcie->ac_to_queue[ctx][ac];
IWL_DEBUG_INFO(trans, "Queue Status: Q[%d] %s\n",
IWL_DEBUG_TX_QUEUES(trans, "Queue Status: Q[%d] %s\n",
ac,
(atomic_read(&trans_pcie->queue_stop_count[ac]) > 0)
? "stopped" : "awake");
iwl_wake_queue(trans, &trans_pcie->txq[txq_id]);
iwl_wake_queue(trans, &trans_pcie->txq[txq_id], msg);
}
}
......@@ -1453,11 +1455,12 @@ static struct iwl_trans *iwl_trans_pcie_alloc(struct iwl_shared *shrd)
return iwl_trans;
}
static void iwl_trans_pcie_stop_queue(struct iwl_trans *trans, int txq_id)
static void iwl_trans_pcie_stop_queue(struct iwl_trans *trans, int txq_id,
const char *msg)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
iwl_stop_queue(trans, &trans_pcie->txq[txq_id]);
iwl_stop_queue(trans, &trans_pcie->txq[txq_id], msg);
}
#define IWL_FLUSH_WAIT_MS 2000
......
......@@ -171,7 +171,8 @@ struct iwl_trans_ops {
void (*tx_start)(struct iwl_trans *trans);
void (*wake_any_queue)(struct iwl_trans *trans,
enum iwl_rxon_context_id ctx);
enum iwl_rxon_context_id ctx,
const char *msg);
int (*send_cmd)(struct iwl_trans *trans, struct iwl_host_cmd *cmd);
......@@ -196,7 +197,7 @@ struct iwl_trans_ops {
void (*free)(struct iwl_trans *trans);
void (*stop_queue)(struct iwl_trans *trans, int q);
void (*stop_queue)(struct iwl_trans *trans, int q, const char *msg);
int (*dbgfs_register)(struct iwl_trans *trans, struct dentry* dir);
int (*check_stuck_queue)(struct iwl_trans *trans, int q);
......@@ -277,9 +278,10 @@ static inline void iwl_trans_tx_start(struct iwl_trans *trans)
}
static inline void iwl_trans_wake_any_queue(struct iwl_trans *trans,
enum iwl_rxon_context_id ctx)
enum iwl_rxon_context_id ctx,
const char *msg)
{
trans->ops->wake_any_queue(trans, ctx);
trans->ops->wake_any_queue(trans, ctx, msg);
}
......@@ -339,9 +341,10 @@ static inline void iwl_trans_free(struct iwl_trans *trans)
trans->ops->free(trans);
}
static inline void iwl_trans_stop_queue(struct iwl_trans *trans, int q)
static inline void iwl_trans_stop_queue(struct iwl_trans *trans, int q,
const char *msg)
{
trans->ops->stop_queue(trans, q);
trans->ops->stop_queue(trans, q, msg);
}
static inline int iwl_trans_wait_tx_queue_empty(struct iwl_trans *trans)
......
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