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>

diff --git a/drivers/net/qlcnic/qlcnic.h b/drivers/net/qlcnic/qlcnic.h
index 5c89f4e..2ed34cd 100644 (file)
--- a/drivers/net/qlcnic/qlcnic.h
+++ b/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;

diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c
index 6a7b813..f1949c9 100644 (file)
--- 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);