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>

1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c
index 6a7b81388351..f1949c93ab25 100644
--- a/drivers/net/qlcnic/qlcnic_main.c
+++ b/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);