iwlwifi: print more info when a queue is stuck

Print some more info from the SCD's SRAM and dump the TRB
from the FH.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 12 insertions, 1 deletions

diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c
index 1eabb834e32a..1904fdaf3177 100644
--- a/drivers/net/wireless/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/iwlwifi/pcie/trans.c
@@ -298,6 +298,10 @@ static void iwl_trans_pcie_queue_stuck_timer(unsigned long data)
         struct iwl_tx_queue *txq = (void *)data;
         struct iwl_trans_pcie *trans_pcie = txq->trans_pcie;
         struct iwl_trans *trans = iwl_trans_pcie_get_trans(trans_pcie);
+        u32 scd_sram_addr = trans_pcie->scd_base_addr +
+                SCD_TX_STTS_MEM_LOWER_BOUND + (16 * txq->q.id);
+        u8 buf[16];
+        int i;
 
         spin_lock(&txq->lock);
         /* check if triggered erroneously */
@@ -307,7 +311,6 @@ static void iwl_trans_pcie_queue_stuck_timer(unsigned long data)
         }
         spin_unlock(&txq->lock);
 
-
         IWL_ERR(trans, "Queue %d stuck for %u ms.\n", txq->q.id,
                 jiffies_to_msecs(trans_pcie->wd_timeout));
         IWL_ERR(trans, "Current SW read_ptr %d write_ptr %d\n",
@@ -317,6 +320,14 @@ static void iwl_trans_pcie_queue_stuck_timer(unsigned long data)
                                         & (TFD_QUEUE_SIZE_MAX - 1),
                 iwl_read_prph(trans, SCD_QUEUE_WRPTR(txq->q.id)));
 
+        iwl_read_targ_mem_bytes(trans, scd_sram_addr, buf, sizeof(buf));
+
+        iwl_print_hex_error(trans, buf, sizeof(buf));
+
+        for (i = 0; i < FH_TCSR_CHNL_NUM; i++)
+                IWL_ERR(trans, "FH TRBs(%d) = 0x%08x\n", i,
+                        iwl_read_direct32(trans, FH_TX_TRB_REG(i)));
+
         iwl_op_mode_nic_error(trans->op_mode);
 }