[PATCH net-next 4/9] net: hns3: Add support to request VF Reset to PF

[Salil Mehta]

VF driver depends upon PF to eventually reset the hardware. This
request is made using the mailbox command. This patch adds the
required function to acheive above.

Signed-off-by: Salil Mehta <salil.me...@huawei.com>
---
 .../net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c 
b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
index 0d204e2..b648311 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
@@ -832,6 +832,20 @@ static void hclgevf_reset_tqp(struct hnae3_handle *handle, 
u16 queue_id)
                             2, true, NULL, 0);
 }
 
+static int hclgevf_do_reset(struct hclgevf_dev *hdev)
+{
+       int status;
+       u8 respmsg;
+
+       status = hclgevf_send_mbx_msg(hdev, HCLGE_MBX_RESET, 0, NULL,
+                                     0, false, &respmsg, sizeof(u8));
+       if (status)
+               dev_err(&hdev->pdev->dev,
+                       "VF reset request to PF failed(=%d)\n", status);
+
+       return status;
+}
+
 static void hclgevf_reset_event(struct hnae3_handle *handle)
 {
        struct hclgevf_dev *hdev = hclgevf_ae_get_hdev(handle);
@@ -910,6 +924,7 @@ static void hclgevf_reset_service_task(struct work_struct 
*work)
 {
        struct hclgevf_dev *hdev =
                container_of(work, struct hclgevf_dev, rst_service_task);
+       int ret;
 
        if (test_and_set_bit(HCLGEVF_STATE_RST_HANDLING, &hdev->state))
                return;
@@ -965,6 +980,10 @@ static void hclgevf_reset_service_task(struct work_struct 
*work)
                        hdev->reset_attempts++;
 
                        /* request PF for resetting this VF via mailbox */
+                       ret = hclgevf_do_reset(hdev);
+                       if (ret)
+                               dev_warn(&hdev->pdev->dev,
+                                        "VF rst fail, stack will call\n");
                }
        }
 
-- 
2.7.4