diff mbox series

[net,1/7] net: hns3: clear hardware resource when loading driver

Message ID 1629976921-43438-2-git-send-email-huangguangbin2@huawei.com (mailing list archive)
State Accepted
Commit 1a6d281946c330cee2855f6d0cd796616e54601f
Delegated to: Netdev Maintainers
Headers show
Series net: hns3: add some fixes for -net | expand

Checks

Context Check Description
netdev/cover_letter success Link
netdev/fixes_present success Link
netdev/patch_count success Link
netdev/tree_selection success Clearly marked for net
netdev/subject_prefix success Link
netdev/cc_maintainers fail 3 blamed authors not CCed: yisen.zhuang@huawei.com salil.mehta@huawei.com huangdaode@hisilicon.com; 8 maintainers not CCed: moyufeng@huawei.com huangdaode@hisilicon.com tanhuazhong@huawei.com liaoguojia@huawei.com shenjian15@huawei.com yisen.zhuang@huawei.com salil.mehta@huawei.com zhangjiaran@huawei.com
netdev/source_inline success Was 0 now: 0
netdev/verify_signedoff success Link
netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/verify_fixes success Link
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 47 lines checked
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/header_inline success Link

Commit Message

Guangbin Huang Aug. 26, 2021, 11:21 a.m. UTC
From: Yufeng Mo <moyufeng@huawei.com>

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>
---
 .../net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h |  3 +++
 .../ethernet/hisilicon/hns3/hns3pf/hclge_main.c    | 26 ++++++++++++++++++++++
 2 files changed, 29 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h
index 18bde77ef944..d455d689d93a 100644
--- 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 ebeaf12e409b..ac88608a94b6 100644
--- 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;