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Subject[PATCH net-next 4/7] net: hns3: Add RoCE VF reset support
Date
Add RoCE VF client reset support by notifying the RoCE VF client
when hns3 VF is resetting and adding a interface to query whether
CMDQ is ready to work.

Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
---
.../ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c | 50 ++++++++++++++++++++++
.../ethernet/hisilicon/hns3/hns3vf/hclgevf_main.h | 1 +
2 files changed, 51 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
index 8c8e666..50c84c5 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
@@ -1702,6 +1702,26 @@ static int hclgevf_notify_client(struct hclgevf_dev *hdev,
return ret;
}

+static int hclgevf_notify_roce_client(struct hclgevf_dev *hdev,
+ enum hnae3_reset_notify_type type)
+{
+ struct hnae3_client *client = hdev->roce_client;
+ struct hnae3_handle *handle = &hdev->roce;
+ int ret;
+
+ if (!test_bit(HCLGEVF_STATE_ROCE_REGISTERED, &hdev->state) || !client)
+ return 0;
+
+ if (!client->ops->reset_notify)
+ return -EOPNOTSUPP;
+
+ ret = client->ops->reset_notify(handle, type);
+ if (ret)
+ dev_err(&hdev->pdev->dev, "notify roce client failed %d(%d)",
+ type, ret);
+ return ret;
+}
+
static int hclgevf_reset_wait(struct hclgevf_dev *hdev)
{
#define HCLGEVF_RESET_WAIT_US 20000
@@ -1865,6 +1885,11 @@ static int hclgevf_reset_prepare(struct hclgevf_dev *hdev)

hdev->rst_stats.rst_cnt++;

+ /* perform reset of the stack & ae device for a client */
+ ret = hclgevf_notify_roce_client(hdev, HNAE3_DOWN_CLIENT);
+ if (ret)
+ return ret;
+
rtnl_lock();
/* bring down the nic to stop any ongoing TX/RX */
ret = hclgevf_notify_client(hdev, HNAE3_DOWN_CLIENT);
@@ -1880,6 +1905,9 @@ static int hclgevf_reset_rebuild(struct hclgevf_dev *hdev)
int ret;

hdev->rst_stats.hw_rst_done_cnt++;
+ ret = hclgevf_notify_roce_client(hdev, HNAE3_UNINIT_CLIENT);
+ if (ret)
+ return ret;

rtnl_lock();
/* now, re-initialize the nic client and ae device */
@@ -1890,6 +1918,18 @@ static int hclgevf_reset_rebuild(struct hclgevf_dev *hdev)
return ret;
}

+ ret = hclgevf_notify_roce_client(hdev, HNAE3_INIT_CLIENT);
+ /* ignore RoCE notify error if it fails HCLGEVF_RESET_MAX_FAIL_CNT - 1
+ * times
+ */
+ if (ret &&
+ hdev->rst_stats.rst_fail_cnt < HCLGEVF_RESET_MAX_FAIL_CNT - 1)
+ return ret;
+
+ ret = hclgevf_notify_roce_client(hdev, HNAE3_UP_CLIENT);
+ if (ret)
+ return ret;
+
hdev->last_reset_time = jiffies;
hdev->rst_stats.rst_done_cnt++;
hdev->rst_stats.rst_fail_cnt = 0;
@@ -2757,6 +2797,7 @@ static int hclgevf_init_roce_client_instance(struct hnae3_ae_dev *ae_dev,
if (ret)
return ret;

+ set_bit(HCLGEVF_STATE_ROCE_REGISTERED, &hdev->state);
hnae3_set_client_init_flag(client, ae_dev, 1);

return 0;
@@ -2817,6 +2858,7 @@ static void hclgevf_uninit_client_instance(struct hnae3_client *client,

/* un-init roce, if it exists */
if (hdev->roce_client) {
+ clear_bit(HCLGEVF_STATE_ROCE_REGISTERED, &hdev->state);
hdev->roce_client->ops->uninit_instance(&hdev->roce, 0);
hdev->roce_client = NULL;
hdev->roce.client = NULL;
@@ -3419,6 +3461,13 @@ static bool hclgevf_get_hw_reset_stat(struct hnae3_handle *handle)
return !!hclgevf_read_dev(&hdev->hw, HCLGEVF_RST_ING);
}

+static bool hclgevf_get_cmdq_stat(struct hnae3_handle *handle)
+{
+ struct hclgevf_dev *hdev = hclgevf_ae_get_hdev(handle);
+
+ return test_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->state);
+}
+
static bool hclgevf_ae_dev_resetting(struct hnae3_handle *handle)
{
struct hclgevf_dev *hdev = hclgevf_ae_get_hdev(handle);
@@ -3604,6 +3653,7 @@ static const struct hnae3_ae_ops hclgevf_ops = {
.get_link_mode = hclgevf_get_link_mode,
.set_promisc_mode = hclgevf_set_promisc_mode,
.request_update_promisc_mode = hclgevf_request_update_promisc_mode,
+ .get_cmdq_stat = hclgevf_get_cmdq_stat,
};

static struct hnae3_ae_algo ae_algovf = {
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.h b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.h
index c1fac89..c5bcc38 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.h
@@ -139,6 +139,7 @@ enum hclgevf_states {
HCLGEVF_STATE_IRQ_INITED,
HCLGEVF_STATE_REMOVING,
HCLGEVF_STATE_NIC_REGISTERED,
+ HCLGEVF_STATE_ROCE_REGISTERED,
/* task states */
HCLGEVF_STATE_RST_SERVICE_SCHED,
HCLGEVF_STATE_RST_HANDLING,
--
2.7.4
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