diff options
| author |   Huazhong Tan <tanhuazhong@huawei.com> | 2019-05-28 17:02:59 +0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-05-28 17:39:01 -0700 |
| commit | ada13ee3db7b8959d7df81265a2633f987a0a13c (patch) | |
| tree | 6517d21aaa39f0cc1120f1283ab2f592a1047486 /drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c | |
| parent | net: hns3: modify hclgevf_init_client_instance() (diff) | |
| download | linux-dev-ada13ee3db7b8959d7df81265a2633f987a0a13c.tar.xz linux-dev-ada13ee3db7b8959d7df81265a2633f987a0a13c.zip | |
net: hns3: add handshake with hardware while doing reset
When reset happens, the hardware reset should begin after the
driver has finished its preparatory work, otherwise it may cause
some hardware error.
Before Hardware's reset, it will wait for the driver to write
bit HCLGE_NIC_CMQ_ENABLE of register HCLGE_NIC_CSQ_DEPTH_REG
to 1, while the driver finishes its preparatory work will do that.
BTW, since some cases this register will be cleared, so it needs
some sync time before driver's writing.
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c index 9d5a4f817048..ee1eecad3b8d 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c @@ -1414,6 +1414,8 @@ static int hclgevf_reset_stack(struct hclgevf_dev *hdev) static int hclgevf_reset_prepare_wait(struct hclgevf_dev *hdev) { +#define HCLGEVF_RESET_SYNC_TIME 100 + int ret = 0; switch (hdev->reset_type) { @@ -1431,7 +1433,10 @@ static int hclgevf_reset_prepare_wait(struct hclgevf_dev *hdev) } set_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->state); - + /* inform hardware that preparatory work is done */ + msleep(HCLGEVF_RESET_SYNC_TIME); + hclgevf_write_dev(&hdev->hw, HCLGEVF_NIC_CSQ_DEPTH_REG, + HCLGEVF_NIC_CMQ_ENABLE); dev_info(&hdev->pdev->dev, "prepare reset(%d) wait done, ret:%d\n", hdev->reset_type, ret); |