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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: 46a3df9f97 ("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>
This commit is contained in:
Yufeng Mo 2021-08-26 19:21:55 +08:00 committed by Jakub Kicinski
parent 733c99ee8b
commit 1a6d281946
2 changed files with 29 additions and 0 deletions
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3
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h
View File

@ -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,

26
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
View File

@ -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;