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| author | Anthony PERARD <anthony.perard@citrix.com> | 2014-10-29 06:51:26 +0000 |
|---|---|---|
| committer | jljusten <jljusten@Edk2> | 2014-10-29 06:51:26 +0000 |
| commit | e86895d9e489dafe904622867b197acff6ef4355 (patch) | |
| tree | 2823308a7ebf0e7bc63ca1042c0ecd822b7a1d0d /OvmfPkg/XenBusDxe | |
| parent | 86d968e05ee062b10fe8d597b34f5eab2e2878bd (diff) | |
| download | edk2-e86895d9e489dafe904622867b197acff6ef4355.tar.gz edk2-e86895d9e489dafe904622867b197acff6ef4355.tar.bz2 edk2-e86895d9e489dafe904622867b197acff6ef4355.zip | |
OvmfPkg/XenBusDxe: Add Event Channel into XenBus protocol.
This patch adds three event channel related functions:
- EventChannelAllocate: Allocate an event channel port that can be bind
from a specified domain.
- EventChannelNotify: Send an event to the remote end of a channel.
- EventChannelClose: Close a local event channel port.
Change in V3:
- eventchannel, update protocol to return error code.
- expand patch description
- Add comments in the XenBus Protocol header.
Change in V2:
- coding style
- adding comment to functions
- Rename Xenbus to XenBus.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16271 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'OvmfPkg/XenBusDxe')
| -rw-r--r-- | OvmfPkg/XenBusDxe/EventChannel.c | 55 | ||||
| -rw-r--r-- | OvmfPkg/XenBusDxe/EventChannel.h | 52 | ||||
| -rw-r--r-- | OvmfPkg/XenBusDxe/XenBus.c | 3 |
3 files changed, 110 insertions, 0 deletions
diff --git a/OvmfPkg/XenBusDxe/EventChannel.c b/OvmfPkg/XenBusDxe/EventChannel.c index c4076c49ea..547c111aae 100644 --- a/OvmfPkg/XenBusDxe/EventChannel.c +++ b/OvmfPkg/XenBusDxe/EventChannel.c @@ -31,3 +31,58 @@ XenEventChannelNotify ( ReturnCode = XenHypercallEventChannelOp (Dev, EVTCHNOP_send, &Send);
return ReturnCode;
}
+
+UINT32
+EFIAPI
+XenBusEventChannelAllocate (
+ IN XENBUS_PROTOCOL *This,
+ IN domid_t DomainId,
+ OUT evtchn_port_t *Port
+ )
+{
+ XENBUS_PRIVATE_DATA *Private;
+ evtchn_alloc_unbound_t Parameter;
+ UINT32 ReturnCode;
+
+ Private = XENBUS_PRIVATE_DATA_FROM_THIS (This);
+
+ Parameter.dom = DOMID_SELF;
+ Parameter.remote_dom = DomainId;
+ ReturnCode = XenHypercallEventChannelOp (Private->Dev,
+ EVTCHNOP_alloc_unbound,
+ &Parameter);
+ if (ReturnCode != 0) {
+ DEBUG ((EFI_D_ERROR, "ERROR: alloc_unbound failed with rc=%d", ReturnCode));
+ return ReturnCode;
+ }
+ *Port = Parameter.port;
+ return ReturnCode;
+}
+
+UINT32
+EFIAPI
+XenBusEventChannelNotify (
+ IN XENBUS_PROTOCOL *This,
+ IN evtchn_port_t Port
+ )
+{
+ XENBUS_PRIVATE_DATA *Private;
+
+ Private = XENBUS_PRIVATE_DATA_FROM_THIS(This);
+ return XenEventChannelNotify (Private->Dev, Port);
+}
+
+UINT32
+EFIAPI
+XenBusEventChannelClose (
+ IN XENBUS_PROTOCOL *This,
+ IN evtchn_port_t Port
+ )
+{
+ XENBUS_PRIVATE_DATA *Private;
+ evtchn_close_t Close;
+
+ Private = XENBUS_PRIVATE_DATA_FROM_THIS (This);
+ Close.port = Port;
+ return XenHypercallEventChannelOp (Private->Dev, EVTCHNOP_close, &Close);
+}
diff --git a/OvmfPkg/XenBusDxe/EventChannel.h b/OvmfPkg/XenBusDxe/EventChannel.h index 5f3171d7ca..4dcc20f73b 100644 --- a/OvmfPkg/XenBusDxe/EventChannel.h +++ b/OvmfPkg/XenBusDxe/EventChannel.h @@ -33,4 +33,56 @@ XenEventChannelNotify ( IN evtchn_port_t Port
);
+/*
+ * XenBus protocol
+ */
+
+/**
+ Allocate a port that can be bind from domain DomainId.
+
+ @param This A pointer to the XENBUS_PROTOCOL.
+ @param DomainId The domain ID that can bind the newly allocated port.
+ @param Port A pointer to a evtchn_port_t that will contain the newly
+ allocated port.
+
+ @retval UINT32 The return value from the hypercall, 0 if success.
+**/
+UINT32
+EFIAPI
+XenBusEventChannelAllocate (
+ IN XENBUS_PROTOCOL *This,
+ IN domid_t DomainId,
+ OUT evtchn_port_t *Port
+ );
+
+/**
+ Send an event to the remote end of the channel whose local endpoint is Port.
+
+ @param This A pointer to the XENBUS_PROTOCOL.
+ @param Port Local port to the the event from.
+
+ @retval UINT32 The return value from the hypercall, 0 if success.
+**/
+UINT32
+EFIAPI
+XenBusEventChannelNotify (
+ IN XENBUS_PROTOCOL *This,
+ IN evtchn_port_t Port
+ );
+
+/**
+ Close a local event channel Port.
+
+ @param This A pointer to the XENBUS_PROTOCOL.
+ @param Port The event channel to close.
+
+ @retval UINT32 The return value from the hypercall, 0 if success.
+**/
+UINT32
+EFIAPI
+XenBusEventChannelClose (
+ IN XENBUS_PROTOCOL *This,
+ IN evtchn_port_t Port
+ );
+
#endif
diff --git a/OvmfPkg/XenBusDxe/XenBus.c b/OvmfPkg/XenBusDxe/XenBus.c index edd2d95217..896a6607b7 100644 --- a/OvmfPkg/XenBusDxe/XenBus.c +++ b/OvmfPkg/XenBusDxe/XenBus.c @@ -359,6 +359,9 @@ STATIC XENBUS_PRIVATE_DATA gXenBusPrivateData = { .XenBusIo.SetState = XenBusSetState,
.XenBusIo.GrantAccess = XenBusGrantAccess,
.XenBusIo.GrantEndAccess = XenBusGrantEndAccess,
+ .XenBusIo.EventChannelAllocate = XenBusEventChannelAllocate,
+ .XenBusIo.EventChannelNotify = XenBusEventChannelNotify,
+ .XenBusIo.EventChannelClose = XenBusEventChannelClose,
.XenBusIo.RegisterWatch = XenBusRegisterWatch,
.XenBusIo.RegisterWatchBackend = XenBusRegisterWatchBackend,
.XenBusIo.UnregisterWatch = XenBusUnregisterWatch,
|