net: hns3: clear hardware resource when loading driver

If a PF is bonded to a virtual machine and the virtual machine exits
unexpectedly, some hardware resource cannot be cleared. In this case,
loading driver may cause exceptions. Therefore, the hardware resource
needs to be cleared when the driver is loaded.

Fixes: 46a3df9f9718 ("net: hns3: Add HNS3 Acceleration Engine & Compatibility Layer Support")
Signed-off-by: Yufeng Mo <moyufeng@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h
index 18bde77ef944254c66f62606e194856b4e0b16c0..d455d689d93a90e4bbcab4ede5336919510aa87f 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h
@@ -270,6 +270,9 @@ enum hclge_opcode_type {
        /* Led command */
        HCLGE_OPC_LED_STATUS_CFG        = 0xB000,
 
+       /* clear hardware resource command */
+       HCLGE_OPC_CLEAR_HW_RESOURCE     = 0x700B,
+
        /* NCL config command */
        HCLGE_OPC_QUERY_NCL_CONFIG      = 0x7011,
 

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index ebeaf12e409bcf0fd96d891c27fb2f3fd53e6159..ac88608a94b6f48eddf6ba7e611cb656fab96eac 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -11443,6 +11443,28 @@ static void hclge_clear_resetting_state(struct hclge_dev *hdev)
        }
 }
 
+static int hclge_clear_hw_resource(struct hclge_dev *hdev)
+{
+       struct hclge_desc desc;
+       int ret;
+
+       hclge_cmd_setup_basic_desc(&desc, HCLGE_OPC_CLEAR_HW_RESOURCE, false);
+
+       ret = hclge_cmd_send(&hdev->hw, &desc, 1);
+       /* This new command is only supported by new firmware, it will
+        * fail with older firmware. Error value -EOPNOSUPP can only be
+        * returned by older firmware running this command, to keep code
+        * backward compatible we will override this value and return
+        * success.
+        */
+       if (ret && ret != -EOPNOTSUPP) {
+               dev_err(&hdev->pdev->dev,
+                       "failed to clear hw resource, ret = %d\n", ret);
+               return ret;
+       }
+       return 0;
+}
+
 static void hclge_init_rxd_adv_layout(struct hclge_dev *hdev)
 {
        if (hnae3_ae_dev_rxd_adv_layout_supported(hdev->ae_dev))
@@ -11492,6 +11514,10 @@ static int hclge_init_ae_dev(struct hnae3_ae_dev *ae_dev)
        if (ret)
                goto err_cmd_uninit;
 
+       ret  = hclge_clear_hw_resource(hdev);
+       if (ret)
+               goto err_cmd_uninit;
+
        ret = hclge_get_cap(hdev);
        if (ret)
                goto err_cmd_uninit;