enic: Use a lighter reset operation for enic devices
The port profile information for a dynamic enic device is set by the upper
layers, that are oblivious to the device reset operation. We do not want a
reset operation erase the network state of a dynamic enic device as there
is no way to set up the port profile information again. Hence a lighter
reset operation called hang reset is used. Hang reset, unlike soft reset
does not reset the network state and resets the host side state only.
Signed-off-by: Scott Feldman <scofeldm@cisco.com>
Signed-off-by: Vasanthy Kolluri <vkolluri@cisco.com>
Signed-off-by: Roopa Prabhu <roprabhu@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/enic/vnic_dev.c b/drivers/net/enic/vnic_dev.c
index e3742fa..c93012f 100644
--- a/drivers/net/enic/vnic_dev.c
+++ b/drivers/net/enic/vnic_dev.c
@@ -486,6 +486,44 @@
return 0;
}
+int vnic_dev_hang_reset(struct vnic_dev *vdev, int arg)
+{
+ u64 a0 = (u32)arg, a1 = 0;
+ int wait = 1000;
+ int err;
+
+ err = vnic_dev_cmd(vdev, CMD_HANG_RESET, &a0, &a1, wait);
+ if (err == ERR_ECMDUNKNOWN) {
+ err = vnic_dev_soft_reset(vdev, arg);
+ if (err)
+ return err;
+
+ return vnic_dev_init(vdev, 0);
+ }
+
+ return err;
+}
+
+int vnic_dev_hang_reset_done(struct vnic_dev *vdev, int *done)
+{
+ u64 a0 = 0, a1 = 0;
+ int wait = 1000;
+ int err;
+
+ *done = 0;
+
+ err = vnic_dev_cmd(vdev, CMD_HANG_RESET_STATUS, &a0, &a1, wait);
+ if (err) {
+ if (err == ERR_ECMDUNKNOWN)
+ return vnic_dev_soft_reset_done(vdev, done);
+ return err;
+ }
+
+ *done = (a0 == 0);
+
+ return 0;
+}
+
int vnic_dev_hang_notify(struct vnic_dev *vdev)
{
u64 a0, a1;