net: hns3: uninitialize command queue while unloading PF driver

According to the hardware's description, the driver should clear
the command queue's registers when uloading driver. Otherwise,
these existing value may lead the IMP get into a wrong state.

Also this patch adds hclge_cmd_uninit() to do the command queue
uninitialization which includes clearing registers and freeing
memory.

Fixes: 68c0a5c70614 ("net: hns3: Add HNS3 IMP(Integrated Mgmt Proc) Cmd Interface Support")
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c
index 1dddfcba41a9e3889db51d440a67abd47fc5a186..3a093a92eac516ac40d12309371c3780dc7b20f4 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c
@@ -390,6 +390,20 @@ int hclge_cmd_init(struct hclge_dev *hdev)
        return 0;
 }
 
+static void hclge_cmd_uninit_regs(struct hclge_hw *hw)
+{
+       hclge_write_dev(hw, HCLGE_NIC_CSQ_BASEADDR_L_REG, 0);
+       hclge_write_dev(hw, HCLGE_NIC_CSQ_BASEADDR_H_REG, 0);
+       hclge_write_dev(hw, HCLGE_NIC_CSQ_DEPTH_REG, 0);
+       hclge_write_dev(hw, HCLGE_NIC_CSQ_HEAD_REG, 0);
+       hclge_write_dev(hw, HCLGE_NIC_CSQ_TAIL_REG, 0);
+       hclge_write_dev(hw, HCLGE_NIC_CRQ_BASEADDR_L_REG, 0);
+       hclge_write_dev(hw, HCLGE_NIC_CRQ_BASEADDR_H_REG, 0);
+       hclge_write_dev(hw, HCLGE_NIC_CRQ_DEPTH_REG, 0);
+       hclge_write_dev(hw, HCLGE_NIC_CRQ_HEAD_REG, 0);
+       hclge_write_dev(hw, HCLGE_NIC_CRQ_TAIL_REG, 0);
+}
+
 static void hclge_destroy_queue(struct hclge_cmq_ring *ring)
 {
        spin_lock(&ring->lock);
@@ -402,3 +416,15 @@ void hclge_destroy_cmd_queue(struct hclge_hw *hw)
        hclge_destroy_queue(&hw->cmq.csq);
        hclge_destroy_queue(&hw->cmq.crq);
 }
+
+void hclge_cmd_uninit(struct hclge_dev *hdev)
+{
+       spin_lock_bh(&hdev->hw.cmq.csq.lock);
+       spin_lock(&hdev->hw.cmq.crq.lock);
+       set_bit(HCLGE_STATE_CMD_DISABLE, &hdev->state);
+       hclge_cmd_uninit_regs(&hdev->hw);
+       spin_unlock(&hdev->hw.cmq.crq.lock);
+       spin_unlock_bh(&hdev->hw.cmq.csq.lock);
+
+       hclge_destroy_cmd_queue(&hdev->hw);
+}

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h
index ac2cd219a9fbd072c8e1bb33731fb098c17aa988..bad21c89f6b77e14b5322f89b6eadf11e3b3221c 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h
@@ -975,6 +975,6 @@ enum hclge_cmd_status hclge_cmd_mdio_write(struct hclge_hw *hw,
 enum hclge_cmd_status hclge_cmd_mdio_read(struct hclge_hw *hw,
                                          struct hclge_desc *desc);
 
-void hclge_destroy_cmd_queue(struct hclge_hw *hw);
+void hclge_cmd_uninit(struct hclge_dev *hdev);
 int hclge_cmd_queue_init(struct hclge_dev *hdev);
 #endif

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 4a596460271c36205a3990c0577e464eff7802d1..5c8f2e4d71c98df7638d9e3fa45ebe17cb6c5239 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -7669,7 +7669,7 @@ err_msi_irq_uninit:
 err_msi_uninit:
        pci_free_irq_vectors(pdev);
 err_cmd_uninit:
-       hclge_destroy_cmd_queue(&hdev->hw);
+       hclge_cmd_uninit(hdev);
 err_pci_uninit:
        pcim_iounmap(pdev, hdev->hw.io_base);
        pci_clear_master(pdev);
@@ -7796,7 +7796,7 @@ static void hclge_uninit_ae_dev(struct hnae3_ae_dev *ae_dev)
        synchronize_irq(hdev->misc_vector.vector_irq);
 
        hclge_hw_error_set_state(hdev, false);
-       hclge_destroy_cmd_queue(&hdev->hw);
+       hclge_cmd_uninit(hdev);
        hclge_misc_irq_uninit(hdev);
        hclge_pci_uninit(hdev);
        mutex_destroy(&hdev->vport_lock);