OvmfPkg/XenPvBlkDxe: Add BlockIo.

Implement the BlockIo protocol.

Change in V4:
- Replace the license by the commonly used file header text.

Change in V3:
- assert(Media->BlockSize % 512 == 0)
- Use Sector instead of Offset to issue IOs.

Change in V2:
- Remove blockIo2 headers.
- Fix few comment.
- file header, copyright
- Rewrite few comment and error messages
- No more callback
- Improving block read/write, increase to the max size in one request
  (instead of only 8pages)
- Fix lastblock when it's a cdrom
- Do uninitialisation when fail to install fail
- few comment
- Licenses

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@16274 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 65 insertions, 0 deletions

diff --git a/OvmfPkg/XenPvBlkDxe/XenPvBlkDxe.c b/OvmfPkg/XenPvBlkDxe/XenPvBlkDxe.c
index e755a43dd6..caaa9b4ff4 100644
--- a/OvmfPkg/XenPvBlkDxe/XenPvBlkDxe.c
+++ b/OvmfPkg/XenPvBlkDxe/XenPvBlkDxe.c
@@ -261,6 +261,7 @@ XenPvBlkDxeDriverBindingStart (
   EFI_STATUS Status;

   XENBUS_PROTOCOL *XenBusIo;

   XEN_BLOCK_FRONT_DEVICE *Dev;

+  EFI_BLOCK_IO_MEDIA *Media;

 

   Status = gBS->OpenProtocol (

                 ControllerHandle,

@@ -279,8 +280,45 @@ XenPvBlkDxeDriverBindingStart (
     goto CloseProtocol;

   }

 

+  CopyMem (&Dev->BlockIo, &gXenPvBlkDxeBlockIo, sizeof (EFI_BLOCK_IO_PROTOCOL));

+  Media = AllocateCopyPool (sizeof (EFI_BLOCK_IO_MEDIA),

+                            &gXenPvBlkDxeBlockIoMedia);

+  if (Dev->MediaInfo.VDiskInfo & VDISK_REMOVABLE) {

+    Media->RemovableMedia = TRUE;

+  }

+  Media->MediaPresent = TRUE;

+  Media->ReadOnly = !Dev->MediaInfo.ReadWrite;

+  if (Dev->MediaInfo.CdRom) {

+    //

+    // If it's a cdrom, the blocksize value need to be 2048 for OVMF to

+    // recognize it as a cdrom:

+    //    MdeModulePkg/Universal/Disk/PartitionDxe/ElTorito.c

+    //

+    Media->BlockSize = 2048;

+    Media->LastBlock = DivU64x32 (Dev->MediaInfo.Sectors,

+                                  Media->BlockSize / Dev->MediaInfo.SectorSize) - 1;

+  } else {

+    Media->BlockSize = Dev->MediaInfo.SectorSize;

+    Media->LastBlock = Dev->MediaInfo.Sectors - 1;

+  }

+  ASSERT (Media->BlockSize % 512 == 0);

+  Dev->BlockIo.Media = Media;

+

+  Status = gBS->InstallMultipleProtocolInterfaces (

+                    &ControllerHandle,

+                    &gEfiBlockIoProtocolGuid, &Dev->BlockIo,

+                    NULL

+                    );

+  if (EFI_ERROR (Status)) {

+    DEBUG ((EFI_D_ERROR, "XenPvBlk: install protocol fail: %r\n", Status));

+    goto UninitBlockFront;

+  }

+

   return EFI_SUCCESS;

 

+UninitBlockFront:

+  FreePool (Media);

+  XenPvBlockFrontShutdown (Dev);

 CloseProtocol:

   gBS->CloseProtocol (ControllerHandle, &gXenBusProtocolGuid,

                       This->DriverBindingHandle, ControllerHandle);

@@ -322,6 +360,33 @@ XenPvBlkDxeDriverBindingStop (
   IN EFI_HANDLE                   *ChildHandleBuffer OPTIONAL

   )

 {

+  EFI_BLOCK_IO_PROTOCOL *BlockIo;

+  XEN_BLOCK_FRONT_DEVICE *Dev;

+  EFI_BLOCK_IO_MEDIA *Media;

+  EFI_STATUS Status;

+

+  Status = gBS->OpenProtocol (

+                  ControllerHandle, &gEfiBlockIoProtocolGuid,

+                  (VOID **)&BlockIo,

+                  This->DriverBindingHandle, ControllerHandle,

+                  EFI_OPEN_PROTOCOL_GET_PROTOCOL

+                  );

+  if (EFI_ERROR (Status)) {

+    return Status;

+  }

+

+  Status = gBS->UninstallProtocolInterface (ControllerHandle,

+                  &gEfiBlockIoProtocolGuid, BlockIo);

+  if (EFI_ERROR (Status)) {

+    return Status;

+  }

+

+  Media = BlockIo->Media;

+  Dev = XEN_BLOCK_FRONT_FROM_BLOCK_IO (BlockIo);

+  XenPvBlockFrontShutdown (Dev);

+

+  FreePool (Media);

+

   gBS->CloseProtocol (ControllerHandle, &gXenBusProtocolGuid,

          This->DriverBindingHandle, ControllerHandle);