qlcnic: Fix driver load issue in FW hang

If there is a FW hang when the driver loads, it can not determine the FW operational
mode. Fix it by checking the FW state first before issuing any FW commands to
determine its capabilities and thereby detecting driver operational mode.

Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 62 insertions, 54 deletions

diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c
index 1b8f67dab9b8..6999d5aaa157 100644
--- a/drivers/net/qlcnic/qlcnic_main.c
+++ b/drivers/net/qlcnic/qlcnic_main.c
@@ -566,12 +566,11 @@ err_lock:
 	return ret;
 }
 
-static u32
-qlcnic_get_driver_mode(struct qlcnic_adapter *adapter)
+static void
+qlcnic_check_vf(struct qlcnic_adapter *adapter)
 {
 	void __iomem *msix_base_addr;
 	void __iomem *priv_op;
-	struct qlcnic_info nic_info;
 	u32 func;
 	u32 msix_base;
 	u32 op_mode, priv_level;
@@ -586,20 +585,6 @@ qlcnic_get_driver_mode(struct qlcnic_adapter *adapter)
 	func = (func - msix_base)/QLCNIC_MSIX_TBL_PGSIZE;
 	adapter->ahw.pci_func = func;
 
-	if (!qlcnic_get_nic_info(adapter, &nic_info, adapter->ahw.pci_func)) {
-		adapter->capabilities = nic_info.capabilities;
-
-		if (adapter->capabilities & BIT_6)
-			adapter->flags |= QLCNIC_ESWITCH_ENABLED;
-		else
-			adapter->flags &= ~QLCNIC_ESWITCH_ENABLED;
-	}
-
-	if (!(adapter->flags & QLCNIC_ESWITCH_ENABLED))	{
-		adapter->nic_ops = &qlcnic_ops;
-		return adapter->fw_hal_version;
-	}
-
 	/* Determine function privilege level */
 	priv_op = adapter->ahw.pci_base0 + QLCNIC_DRV_OP_MODE;
 	op_mode = readl(priv_op);
@@ -608,37 +593,14 @@ qlcnic_get_driver_mode(struct qlcnic_adapter *adapter)
 	else
 		priv_level = QLC_DEV_GET_DRV(op_mode, adapter->ahw.pci_func);
 
-	switch (priv_level) {
-	case QLCNIC_MGMT_FUNC:
-		adapter->op_mode = QLCNIC_MGMT_FUNC;
-		adapter->nic_ops = &qlcnic_ops;
-		qlcnic_init_pci_info(adapter);
-		/* Set privilege level for other functions */
-		qlcnic_set_function_modes(adapter);
-		dev_info(&adapter->pdev->dev,
-			"HAL Version: %d, Management function\n",
-			adapter->fw_hal_version);
-		break;
-	case QLCNIC_PRIV_FUNC:
-		adapter->op_mode = QLCNIC_PRIV_FUNC;
-		dev_info(&adapter->pdev->dev,
-			"HAL Version: %d, Privileged function\n",
-			adapter->fw_hal_version);
-		adapter->nic_ops = &qlcnic_ops;
-		break;
-	case QLCNIC_NON_PRIV_FUNC:
+	if (priv_level == QLCNIC_NON_PRIV_FUNC) {
 		adapter->op_mode = QLCNIC_NON_PRIV_FUNC;
 		dev_info(&adapter->pdev->dev,
 			"HAL Version: %d Non Privileged function\n",
 			adapter->fw_hal_version);
 		adapter->nic_ops = &qlcnic_vf_ops;
-		break;
-	default:
-		dev_info(&adapter->pdev->dev, "Unknown function mode: %d\n",
-			priv_level);
-		return 0;
-	}
-	return adapter->fw_hal_version;
+	} else
+		adapter->nic_ops = &qlcnic_ops;
 }
 
 static int
@@ -671,10 +633,7 @@ qlcnic_setup_pci_map(struct qlcnic_adapter *adapter)
 	adapter->ahw.pci_base0 = mem_ptr0;
 	adapter->ahw.pci_len0 = pci_len0;
 
-	if (!qlcnic_get_driver_mode(adapter)) {
-		iounmap(adapter->ahw.pci_base0);
-		return -EIO;
-	}
+	qlcnic_check_vf(adapter);
 
 	adapter->ahw.ocm_win_crb = qlcnic_get_ioaddr(adapter,
 		QLCNIC_PCIX_PS_REG(PCIX_OCM_WINDOW_REG(adapter->ahw.pci_func)));
@@ -719,6 +678,9 @@ qlcnic_check_options(struct qlcnic_adapter *adapter)
 
 	adapter->fw_version = QLCNIC_VERSION_CODE(fw_major, fw_minor, fw_build);
 
+	if (!(adapter->flags & QLCNIC_ADAPTER_INITIALIZED))
+		if (qlcnic_read_mac_addr(adapter))
+			dev_warn(&pdev->dev, "failed to read mac addr\n");
 	if (adapter->portnum == 0) {
 		get_brd_name(adapter, brd_name);
 
@@ -837,6 +799,51 @@ qlcnic_set_netdev_features(struct qlcnic_adapter *adapter,
 }
 
 static int
+qlcnic_check_eswitch_mode(struct qlcnic_adapter *adapter)
+{
+	void __iomem *priv_op;
+	u32 op_mode, priv_level;
+	int err = 0;
+
+	if (adapter->flags & QLCNIC_ADAPTER_INITIALIZED)
+		return 0;
+
+	priv_op = adapter->ahw.pci_base0 + QLCNIC_DRV_OP_MODE;
+	op_mode = readl(priv_op);
+	priv_level = QLC_DEV_GET_DRV(op_mode, adapter->ahw.pci_func);
+
+	if (op_mode == QLC_DEV_DRV_DEFAULT)
+		priv_level = QLCNIC_MGMT_FUNC;
+	else
+		priv_level = QLC_DEV_GET_DRV(op_mode, adapter->ahw.pci_func);
+
+	if (adapter->capabilities & BIT_6) {
+		adapter->flags |= QLCNIC_ESWITCH_ENABLED;
+		if (priv_level == QLCNIC_MGMT_FUNC) {
+			adapter->op_mode = QLCNIC_MGMT_FUNC;
+			err = qlcnic_init_pci_info(adapter);
+			if (err)
+				return err;
+			/* Set privilege level for other functions */
+			qlcnic_set_function_modes(adapter);
+			dev_info(&adapter->pdev->dev,
+				"HAL Version: %d, Management function\n",
+				adapter->fw_hal_version);
+		} else if (priv_level == QLCNIC_PRIV_FUNC) {
+			adapter->op_mode = QLCNIC_PRIV_FUNC;
+			dev_info(&adapter->pdev->dev,
+				"HAL Version: %d, Privileged function\n",
+				adapter->fw_hal_version);
+		}
+	} else
+		adapter->flags &= ~QLCNIC_ESWITCH_ENABLED;
+
+	adapter->flags |= QLCNIC_ADAPTER_INITIALIZED;
+
+	return err;
+}
+
+static int
 qlcnic_set_default_offload_settings(struct qlcnic_adapter *adapter)
 {
 	struct qlcnic_esw_func_cfg esw_cfg;
@@ -1005,8 +1012,14 @@ set_dev_ready:
 	err = qlcnic_reset_npar_config(adapter);
 	if (err)
 		goto err_out;
-	qlcnic_dev_set_npar_ready(adapter);
 	qlcnic_check_options(adapter);
+	err = qlcnic_check_eswitch_mode(adapter);
+	if (err) {
+		dev_err(&adapter->pdev->dev,
+			"Memory allocation failed for eswitch\n");
+		goto err_out;
+	}
+	qlcnic_dev_set_npar_ready(adapter);
 	adapter->need_fw_reset = 0;
 
 	qlcnic_release_firmware(adapter);
@@ -1015,6 +1028,7 @@ set_dev_ready:
 err_out:
 	QLCWR32(adapter, QLCNIC_CRB_DEV_STATE, QLCNIC_DEV_FAILED);
 	dev_err(&adapter->pdev->dev, "Device state set to failed\n");
+
 	qlcnic_release_firmware(adapter);
 	return err;
 }
@@ -1419,9 +1433,6 @@ qlcnic_setup_netdev(struct qlcnic_adapter *adapter,
 		netdev->features |= NETIF_F_LRO;
 	netdev->irq = adapter->msix_entries[0].vector;
 
-	if (qlcnic_read_mac_addr(adapter))
-		dev_warn(&pdev->dev, "failed to read mac addr\n");
-
 	netif_carrier_off(netdev);
 	netif_stop_queue(netdev);
 
@@ -1515,9 +1526,6 @@ qlcnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto err_out_iounmap;
 	}
 
-	if (qlcnic_read_mac_addr(adapter))
-		dev_warn(&pdev->dev, "failed to read mac addr\n");
-
 	err = qlcnic_setup_idc_param(adapter);
 	if (err)
 		goto err_out_iounmap;