qlcnic: add idc debug registers

When ever driver changes the device state, it should write
pci-func number and timestamp in debug registers.

Signed-off-by: Sucheta Chakraborty <sucheta.chakraborty@qlogic.com>
Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/qlcnic/qlcnic.h

@@ -960,6 +960,8 @@ struct qlcnic_adapter {
 
 	u8 mac_addr[ETH_ALEN];
 
+	u64 dev_rst_time;
+
 	struct qlcnic_adapter_stats stats;
 
 	struct qlcnic_recv_context recv_ctx;

drivers/net/qlcnic/qlcnic_main.c

@@ -84,6 +84,7 @@ static void qlcnic_remove_sysfs_entries(struct qlcnic_adapter *adapter);
 static void qlcnic_create_diag_entries(struct qlcnic_adapter *adapter);
 static void qlcnic_remove_diag_entries(struct qlcnic_adapter *adapter);
 
+static void qlcnic_idc_debug_info(struct qlcnic_adapter *adapter, u8 encoding);
 static void qlcnic_clr_all_drv_state(struct qlcnic_adapter *adapter);
 static int qlcnic_can_start_firmware(struct qlcnic_adapter *adapter);
 
@@ -620,6 +621,7 @@ wait_init:
 		goto err_out;
 
 	QLCWR32(adapter, QLCNIC_CRB_DEV_STATE, QLCNIC_DEV_READY);
+	qlcnic_idc_debug_info(adapter, 1);
 
 	qlcnic_check_options(adapter);
 
@@ -1056,6 +1058,7 @@ qlcnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	adapter = netdev_priv(netdev);
 	adapter->netdev  = netdev;
 	adapter->pdev    = pdev;
+	adapter->dev_rst_time = jiffies;
 	adapter->ahw.pci_func  = pci_func_id;
 
 	revision_id = pdev->revision;
@@ -1887,6 +1890,19 @@ static void qlcnic_poll_controller(struct net_device *netdev)
 }
 #endif
 
+static void
+qlcnic_idc_debug_info(struct qlcnic_adapter *adapter, u8 encoding)
+{
+	u32 val;
+
+	val = adapter->portnum & 0xf;
+	val |= encoding << 7;
+	val |= (jiffies - adapter->dev_rst_time) << 8;
+
+	QLCWR32(adapter, QLCNIC_CRB_DRV_SCRATCH, val);
+	adapter->dev_rst_time = jiffies;
+}
+
 static int
 qlcnic_set_drv_state(struct qlcnic_adapter *adapter, u8 state)
 {
@@ -2010,6 +2026,7 @@ qlcnic_can_start_firmware(struct qlcnic_adapter *adapter)
 	case QLCNIC_DEV_COLD:
 		QLCWR32(adapter, QLCNIC_CRB_DEV_STATE, QLCNIC_DEV_INITIALIZING);
 		QLCWR32(adapter, QLCNIC_CRB_DRV_IDC_VER, QLCNIC_DRV_IDC_VER);
+		qlcnic_idc_debug_info(adapter, 0);
 		qlcnic_api_unlock(adapter);
 		return 1;
 
@@ -2102,6 +2119,8 @@ skip_ack_check:
 			qlcnic_schedule_work(adapter, qlcnic_fwinit_work,
 						FW_POLL_DELAY * 2);
 			QLCDB(adapter, DRV, "Quiscing the driver\n");
+			qlcnic_idc_debug_info(adapter, 0);
+
 			qlcnic_api_unlock(adapter);
 			return;
 		}
@@ -2111,6 +2130,7 @@ skip_ack_check:
 						QLCNIC_DEV_INITIALIZING);
 			set_bit(__QLCNIC_START_FW, &adapter->state);
 			QLCDB(adapter, DRV, "Restarting fw\n");
+			qlcnic_idc_debug_info(adapter, 0);
 		}
 
 		qlcnic_api_unlock(adapter);
@@ -2206,6 +2226,7 @@ qlcnic_dev_request_reset(struct qlcnic_adapter *adapter)
 	if (state == QLCNIC_DEV_READY) {
 		QLCWR32(adapter, QLCNIC_CRB_DEV_STATE, QLCNIC_DEV_NEED_RESET);
 		QLCDB(adapter, DRV, "NEED_RESET state set\n");
+		qlcnic_idc_debug_info(adapter, 0);
 	}
 
 	qlcnic_api_unlock(adapter);