iwlwifi: pcie: centralize SCD status logging

Centralize the logging of SCD status. The motivation is
that for a000 devices we will have new SCD HW, but this
code was duplicate anyway, so it is a proper cleanup.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/pcie/internal.h

@@ -476,6 +476,8 @@ void iwl_trans_pcie_txq_disable(struct iwl_trans *trans, int queue,
 				bool configure_scd);
 void iwl_trans_pcie_txq_set_shared_mode(struct iwl_trans *trans, u32 txq_id,
 					bool shared_mode);
+void iwl_trans_pcie_log_scd_error(struct iwl_trans *trans,
+				  struct iwl_txq *txq);
 int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
 		      struct iwl_device_cmd *dev_cmd, int txq_id);
 void iwl_pcie_txq_check_wrptrs(struct iwl_trans *trans);

drivers/net/wireless/intel/iwlwifi/pcie/trans.c

@@ -1950,6 +1950,48 @@ static void iwl_trans_pcie_block_txq_ptrs(struct iwl_trans *trans, bool block)
 
 #define IWL_FLUSH_WAIT_MS	2000
 
+void iwl_trans_pcie_log_scd_error(struct iwl_trans *trans, struct iwl_txq *txq)
+{
+	struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
+	u32 scd_sram_addr;
+	u8 buf[16];
+	int cnt;
+
+	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)) &
+				(TFD_QUEUE_SIZE_MAX - 1),
+			iwl_read_prph(trans, SCD_QUEUE_WRPTR(cnt)));
+	}
+}
+
 static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, u32 txq_bm)
 {
 	struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
@@ -1957,8 +1999,6 @@ static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, u32 txq_bm)
 	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 */
@@ -1998,42 +2038,8 @@ static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, u32 txq_bm)
 		IWL_DEBUG_TX_QUEUES(trans, "Queue %d is now empty.\n", cnt);
 	}
 
-	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)) &
-				(TFD_QUEUE_SIZE_MAX - 1),
-			iwl_read_prph(trans, SCD_QUEUE_WRPTR(cnt)));
-	}
+	if (ret)
+		iwl_trans_pcie_log_scd_error(trans, txq);
 
 	return ret;
 }

drivers/net/wireless/intel/iwlwifi/pcie/tx.c

@@ -155,10 +155,6 @@ static void iwl_pcie_txq_stuck_timer(unsigned long data)
 	struct iwl_txq *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_QUEUE_OFFSET(txq->q.id);
-	u8 buf[16];
-	int i;
 
 	spin_lock(&txq->lock);
 	/* check if triggered erroneously */
@@ -170,38 +166,8 @@ static void iwl_pcie_txq_stuck_timer(unsigned long data)
 
 	IWL_ERR(trans, "Queue %d stuck for %u ms.\n", txq->q.id,
 		jiffies_to_msecs(txq->wd_timeout));
-	IWL_ERR(trans, "Current SW read_ptr %d write_ptr %d\n",
-		txq->q.read_ptr, txq->q.write_ptr);
-
-	iwl_trans_read_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)));
-
-	for (i = 0; i < trans->cfg->base_params->num_of_queues; i++) {
-		u32 status = iwl_read_prph(trans, SCD_QUEUE_STATUS_BITS(i));
-		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(i));
-
-		if (i & 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",
-			i, active ? "" : "in", fifo, tbl_dw,
-			iwl_read_prph(trans, SCD_QUEUE_RDPTR(i)) &
-				(TFD_QUEUE_SIZE_MAX - 1),
-			iwl_read_prph(trans, SCD_QUEUE_WRPTR(i)));
-	}
+	iwl_trans_pcie_log_scd_error(trans, txq);
 
 	iwl_force_nmi(trans);
 }