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author | Samuel Thibault <samuel.thibault@eu.citrix.com> | 2014-10-29 06:51:58 +0000 |
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committer | jljusten <jljusten@Edk2> | 2014-10-29 06:51:58 +0000 |
commit | 5cce85240450b4f878cc45b2eb16b7b4be74e511 (patch) | |
tree | bdf1817ff027d37f6bff6560816a0a6e302f1bb4 /OvmfPkg/XenPvBlkDxe/XenPvBlkDxe.c | |
parent | de671da8e43c424ebdcf816c45fd06c43ff44aba (diff) | |
download | edk2-5cce85240450b4f878cc45b2eb16b7b4be74e511.tar.gz edk2-5cce85240450b4f878cc45b2eb16b7b4be74e511.tar.bz2 edk2-5cce85240450b4f878cc45b2eb16b7b4be74e511.zip |
OvmfPkg/XenPvBlkDxe: Add BlockFront client.
This is the code that will do the actual communication between OVMF and
a PV block backend, where the block device lives. The protocol used is
describe in the blkif.h header.
This implementation originally comes from Mini-OS, a part of the Xen
Project.
Change in V4:
- add file header to BlockFront.h (license, copyright, brief desc)
Change in V3:
- Improve comment of XenBusReadUint64.
- Moving blkif.h to this patch
with the necessary #pragma pack(4) applied for Ia32.
- Add a note about the license in the commit message
- Add "The protocol used is describe in the blkif.h header." in the
commit message
- Have a mandatory sector-size multiple of 512 or fail to initialize.
- use Sector instead of Offset for IO request.
with Sector been 512-byte unit.
- print something if EventChannelNotify return an error.
Change in V2:
- trigger CoW is probably not needed on OVMF (as opposed to Mini-OS),
removed the test.
- comments
- renamed XenbusReadInteger to XenBusReadUint64
- remove callback from IoData, use simple status instead
- return a status from the synchronus io
- Close protocol if blockfront init fail.
- fix few debug print
- Rename XenbusIo to XenBusIo
- XenPvBlkWaitForBackendState will return an error if the new backend
states is not the expected state.
- Add the license
License: This patch adds some files which are under the MIT license.
Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Jordan Justen <jordan.l.justen@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16273 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'OvmfPkg/XenPvBlkDxe/XenPvBlkDxe.c')
-rw-r--r-- | OvmfPkg/XenPvBlkDxe/XenPvBlkDxe.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/OvmfPkg/XenPvBlkDxe/XenPvBlkDxe.c b/OvmfPkg/XenPvBlkDxe/XenPvBlkDxe.c index a5a69537ee..e755a43dd6 100644 --- a/OvmfPkg/XenPvBlkDxe/XenPvBlkDxe.c +++ b/OvmfPkg/XenPvBlkDxe/XenPvBlkDxe.c @@ -20,6 +20,8 @@ #include "XenPvBlkDxe.h"
+#include "BlockFront.h"
+
///
/// Driver Binding Protocol instance
@@ -258,6 +260,7 @@ XenPvBlkDxeDriverBindingStart ( {
EFI_STATUS Status;
XENBUS_PROTOCOL *XenBusIo;
+ XEN_BLOCK_FRONT_DEVICE *Dev;
Status = gBS->OpenProtocol (
ControllerHandle,
@@ -271,7 +274,17 @@ XenPvBlkDxeDriverBindingStart ( return Status;
}
+ Status = XenPvBlockFrontInitialization (XenBusIo, XenBusIo->Node, &Dev);
+ if (EFI_ERROR (Status)) {
+ goto CloseProtocol;
+ }
+
return EFI_SUCCESS;
+
+CloseProtocol:
+ gBS->CloseProtocol (ControllerHandle, &gXenBusProtocolGuid,
+ This->DriverBindingHandle, ControllerHandle);
+ return Status;
}
/**
|