From: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>
Also when things go wrong (queues don't get emtpy), try to
get some data from the HW.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
drivers/net/wireless/iwlwifi/dvm/mac80211.c | 3 --
drivers/net/wireless/iwlwifi/dvm/tx.c | 28 +++++++++++--------
drivers/net/wireless/iwlwifi/pcie/trans.c | 43 ++++++++++++++++++++++++++++-
drivers/net/wireless/iwlwifi/pcie/tx.c | 7 ++---
4 files changed, 61 insertions(+), 20 deletions(-)
diff --git a/drivers/net/wireless/iwlwifi/dvm/mac80211.c b/drivers/net/wireless/iwlwifi/dvm/mac80211.c
index fef17c1..2da2627 100644
--- a/drivers/net/wireless/iwlwifi/dvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/dvm/mac80211.c
@@ -521,9 +521,6 @@ static void iwlagn_mac_tx(struct ieee80211_hw *hw,
{
struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
- IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
- ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
-
if (iwlagn_tx_skb(priv, control->sta, skb))
ieee80211_free_txskb(hw, skb);
}
diff --git a/drivers/net/wireless/iwlwifi/dvm/tx.c b/drivers/net/wireless/iwlwifi/dvm/tx.c
index df76881..b0aad71 100644
--- a/drivers/net/wireless/iwlwifi/dvm/tx.c
+++ b/drivers/net/wireless/iwlwifi/dvm/tx.c
@@ -231,13 +231,11 @@ static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
if (info->flags & IEEE80211_TX_CTL_AMPDU)
tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
- IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
break;
case WLAN_CIPHER_SUITE_TKIP:
tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
- IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
break;
case WLAN_CIPHER_SUITE_WEP104:
@@ -355,8 +353,6 @@ int iwlagn_tx_skb(struct iwl_priv *priv,
}
}
- IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
-
if (sta)
sta_priv = (void *)sta->drv_priv;
@@ -472,6 +468,9 @@ int iwlagn_tx_skb(struct iwl_priv *priv,
WARN_ON_ONCE(is_agg &&
priv->queue_to_mac80211[txq_id] != info->hw_queue);
+ IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid,
+ txq_id, seq_number);
+
if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
goto drop_unlock_sta;
@@ -953,12 +952,6 @@ static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
AGG_TX_STATE_ABORT_MSK))
continue;
-
- IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
- "try-count (0x%08x)\n",
- iwl_get_agg_tx_fail_reason(fstatus),
- fstatus & AGG_TX_STATUS_MSK,
- fstatus & AGG_TX_TRY_MSK);
}
}
@@ -1212,16 +1205,27 @@ int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
freed++;
}
- WARN_ON(!is_agg && freed != 1);
+ if (!is_agg && freed != 1)
+ IWL_ERR(priv, "Q: %d, freed %d\n", txq_id, freed);
/*
* An offchannel frame can be send only on the AUX queue, where
* there is no aggregation (and reordering) so it only is single
* skb is expected to be processed.
*/
- WARN_ON(is_offchannel_skb && freed != 1);
+ if (is_offchannel_skb && freed != 1)
+ IWL_ERR(priv, "OFFCHANNEL SKB freed %d\n", freed);
}
+ IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id,
+ iwl_get_tx_fail_reason(status), status);
+
+ IWL_DEBUG_TX_REPLY(priv,
+ "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n",
+ le32_to_cpu(tx_resp->rate_n_flags),
+ tx_resp->failure_frame, SEQ_TO_INDEX(sequence), ssn,
+ le16_to_cpu(tx_resp->seq_ctl));
+
iwl_check_abort_status(priv, tx_resp->frame_count, status);
spin_unlock(&priv->sta_lock);
diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c
index 59340ff..c57641e 100644
--- a/drivers/net/wireless/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/iwlwifi/pcie/trans.c
@@ -890,6 +890,8 @@ static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans)
struct iwl_queue *q;
int cnt;
unsigned long now = jiffies;
+ u32 scd_sram_addr;
+ u8 buf[16];
int ret = 0;
/* waiting for all the tx frames complete might take a while */
@@ -903,11 +905,50 @@ static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans)
msleep(1);
if (q->read_ptr != q->write_ptr) {
- IWL_ERR(trans, "fail to flush all tx fifo queues\n");
+ IWL_ERR(trans,
+ "fail to flush all tx fifo queues Q %d\n", cnt);
ret = -ETIMEDOUT;
break;
}
}
+
+ if (!ret)
+ return 0;
+
+ IWL_ERR(trans, "Current SW read_ptr %d write_ptr %d\n",
+ txq->q.read_ptr, txq->q.write_ptr);
+
+ scd_sram_addr = trans_pcie->scd_base_addr +
+ SCD_TX_STTS_QUEUE_OFFSET(txq->q.id);
+ iwl_trans_read_mem_bytes(trans, scd_sram_addr, buf, sizeof(buf));
+
+ iwl_print_hex_error(trans, buf, sizeof(buf));
+
+ for (cnt = 0; cnt < FH_TCSR_CHNL_NUM; cnt++)
+ IWL_ERR(trans, "FH TRBs(%d) = 0x%08x\n", cnt,
+ iwl_read_direct32(trans, FH_TX_TRB_REG(cnt)));
+
+ for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) {
+ u32 status = iwl_read_prph(trans, SCD_QUEUE_STATUS_BITS(cnt));
+ u8 fifo = (status >> SCD_QUEUE_STTS_REG_POS_TXF) & 0x7;
+ bool active = !!(status & BIT(SCD_QUEUE_STTS_REG_POS_ACTIVE));
+ u32 tbl_dw =
+ iwl_trans_read_mem32(trans, trans_pcie->scd_base_addr +
+ SCD_TRANS_TBL_OFFSET_QUEUE(cnt));
+
+ if (cnt & 0x1)
+ tbl_dw = (tbl_dw & 0xFFFF0000) >> 16;
+ else
+ tbl_dw = tbl_dw & 0x0000FFFF;
+
+ IWL_ERR(trans,
+ "Q %d is %sactive and mapped to fifo %d ra_tid 0x%04x [%d,%d]\n",
+ cnt, active ? "" : "in", fifo, tbl_dw,
+ iwl_read_prph(trans,
+ SCD_QUEUE_RDPTR(cnt)) & (txq->q.n_bd - 1),
+ iwl_read_prph(trans, SCD_QUEUE_WRPTR(cnt)));
+ }
+
return ret;
}
diff --git a/drivers/net/wireless/iwlwifi/pcie/tx.c b/drivers/net/wireless/iwlwifi/pcie/tx.c
index fd3280f..a93f067 100644
--- a/drivers/net/wireless/iwlwifi/pcie/tx.c
+++ b/drivers/net/wireless/iwlwifi/pcie/tx.c
@@ -309,6 +309,9 @@ void iwl_pcie_txq_inc_wr_ptr(struct iwl_trans *trans, struct iwl_txq *txq)
return;
}
+ IWL_DEBUG_TX(trans, "Q:%d WR: 0x%x\n", txq_id,
+ txq->q.write_ptr);
+
iwl_write_direct32(trans, HBUS_TARG_WRPTR,
txq->q.write_ptr | (txq_id << 8));
@@ -1660,10 +1663,6 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys);
tx_cmd->dram_msb_ptr = iwl_get_dma_hi_addr(scratch_phys);
- IWL_DEBUG_TX(trans, "sequence nr = 0X%x\n",
- le16_to_cpu(dev_cmd->hdr.sequence));
- IWL_DEBUG_TX(trans, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
-
/* Set up entry for this TFD in Tx byte-count array */
iwl_pcie_txq_update_byte_cnt_tbl(trans, txq, le16_to_cpu(tx_cmd->len));
--
1.8.0
--
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