net: hns3: add handshake with hardware while doing reset
authorHuazhong Tan <tanhuazhong@huawei.com>
Tue, 28 May 2019 09:02:59 +0000 (17:02 +0800)
committerDavid S. Miller <davem@davemloft.net>
Wed, 29 May 2019 00:39:01 +0000 (17:39 -0700)
commitada13ee3db7b8959d7df81265a2633f987a0a13c
tree6517d21aaa39f0cc1120f1283ab2f592a1047486
parent1db58f86975a1f978b71b727ed9951ec53698fc0
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>
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_cmd.c
drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c