[PATCH V2 net-next 6/9] net: hns3: add devlink reload support for PF

From: Guangbin Huang
Date: Thu Jul 15 2021 - 03:48:56 EST


From: Hao Chen <chenhao288@xxxxxxxxxxxxx>

Add devlink reload support for HNS3 ethernet PF driver.

Signed-off-by: Hao Chen <chenhao288@xxxxxxxxxxxxx>
Signed-off-by: Guangbin Huang <huangguangbin2@xxxxxxxxxx>
---
.../ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c | 71 ++++++++++++++++++++++
1 file changed, 71 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c
index 7de423d510c5..facb10aea4e6 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c
@@ -34,8 +34,75 @@ static int hclge_devlink_info_get(struct devlink *devlink,
version_str);
}

+static int hclge_devlink_reload_down(struct devlink *devlink, bool netns_change,
+ enum devlink_reload_action action,
+ enum devlink_reload_limit limit,
+ struct netlink_ext_ack *extack)
+{
+ struct hclge_devlink_priv *priv = devlink_priv(devlink);
+ struct hclge_dev *hdev = priv->hdev;
+ struct hnae3_handle *h = &hdev->vport->nic;
+ struct pci_dev *pdev = hdev->pdev;
+ int ret;
+
+ if (test_bit(HCLGE_STATE_RST_HANDLING, &hdev->state)) {
+ dev_err(&pdev->dev, "reset is handling\n");
+ return -EBUSY;
+ }
+
+ switch (action) {
+ case DEVLINK_RELOAD_ACTION_DRIVER_REINIT:
+ rtnl_lock();
+ ret = hdev->nic_client->ops->reset_notify(h, HNAE3_DOWN_CLIENT);
+ if (ret) {
+ rtnl_unlock();
+ return ret;
+ }
+
+ ret = hdev->nic_client->ops->reset_notify(h,
+ HNAE3_UNINIT_CLIENT);
+ rtnl_unlock();
+ return ret;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int hclge_devlink_reload_up(struct devlink *devlink,
+ enum devlink_reload_action action,
+ enum devlink_reload_limit limit,
+ u32 *actions_performed,
+ struct netlink_ext_ack *extack)
+{
+ struct hclge_devlink_priv *priv = devlink_priv(devlink);
+ struct hclge_dev *hdev = priv->hdev;
+ struct hnae3_handle *h = &hdev->vport->nic;
+ int ret;
+
+ *actions_performed = BIT(action);
+ switch (action) {
+ case DEVLINK_RELOAD_ACTION_DRIVER_REINIT:
+ hclge_devlink_get_param_setting(devlink);
+ rtnl_lock();
+ ret = hdev->nic_client->ops->reset_notify(h, HNAE3_INIT_CLIENT);
+ if (ret) {
+ rtnl_unlock();
+ return ret;
+ }
+
+ ret = hdev->nic_client->ops->reset_notify(h, HNAE3_UP_CLIENT);
+ rtnl_unlock();
+ return ret;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
static const struct devlink_ops hclge_devlink_ops = {
.info_get = hclge_devlink_info_get,
+ .reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT),
+ .reload_down = hclge_devlink_reload_down,
+ .reload_up = hclge_devlink_reload_up,
};

int hclge_devlink_init(struct hclge_dev *hdev)
@@ -62,6 +129,8 @@ int hclge_devlink_init(struct hclge_dev *hdev)

hdev->devlink = devlink;

+ devlink_reload_enable(devlink);
+
return 0;

out_reg_fail:
@@ -76,6 +145,8 @@ void hclge_devlink_uninit(struct hclge_dev *hdev)
if (!devlink)
return;

+ devlink_reload_disable(devlink);
+
devlink_unregister(devlink);

devlink_free(devlink);
--
2.8.1