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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2015-04-12 04:07:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-05-24 22:17:41 +0300 |
| commit | 636c88da6df3bb2f978b48d3a7ed55423da84d19 (patch) | |
| tree | bb6abd4d764c96eb90e7ec8cfc67fa7e791abdd6 /drivers/hv | |
| parent | 1d072339fa9e32365d282d8ade32822de7d21e5f (diff) | |
| download | linux-636c88da6df3bb2f978b48d3a7ed55423da84d19.tar.xz | |
Drivers: hv: util: introduce state machine for util drivers
KVP/VSS/FCOPY drivers work in fully serialized mode: we wait till userspace
daemon registers, wait for a message from the host, send this message to the
daemon, get the reply, send it back to host, wait for another message.
Introduce enum hvutil_device_state to represend this state in all 3 drivers.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Tested-by: Alex Ng <alexng@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv')
| -rw-r--r-- | drivers/hv/hyperv_vmbus.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h index 2f30456d90a5..138d6634c79d 100644 --- a/drivers/hv/hyperv_vmbus.h +++ b/drivers/hv/hyperv_vmbus.h @@ -755,4 +755,13 @@ static inline void hv_poll_channel(struct vmbus_channel *channel, cb(channel); } +enum hvutil_device_state { + HVUTIL_DEVICE_INIT = 0, /* driver is loaded, waiting for userspace */ + HVUTIL_READY, /* userspace is registered */ + HVUTIL_HOSTMSG_RECEIVED, /* message from the host was received */ + HVUTIL_USERSPACE_REQ, /* request to userspace was sent */ + HVUTIL_USERSPACE_RECV, /* reply from userspace was received */ + HVUTIL_DEVICE_DYING, /* driver unload is in progress */ +}; + #endif /* _HYPERV_VMBUS_H */ |