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Update FileLib to use pointer to BlockIo->Media and not a cached copy also add some code in the library init that allows removable media devices to be probed to see if a media change has happened.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10449 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
andrewfish
2010-04-30 19:40:17 +00:00
parent 24542fb211
commit 0a0951ea84
3 changed files with 42 additions and 15 deletions
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35
EmbeddedPkg/Library/EfiFileLib/EfiFileLib.c
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@@ -143,14 +143,41 @@ EblUpdateDeviceLists (
EFI_STATUS Status;
UINTN Size;
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *Fs;
EFI_BLOCK_IO_PROTOCOL *BlkIo;
EFI_FILE_HANDLE Root;
UINTN Index;
BOOLEAN Update;
if (mBlkIo != NULL) {
FreePool (mBlkIo);
}
gBS->LocateHandleBuffer (ByProtocol, &gEfiBlockIoProtocolGuid, NULL, &mBlkIoCount, &mBlkIo);
//
// This is a trick to trigger the gBS->ReinstallProtocolInterface () in a removable media
// device to make a filesystem layer on. Probing devices will detect if media has been
// inserted and create
//
for (Index =0, Update = FALSE; Index < mBlkIoCount; Index++) {
Status = gBS->HandleProtocol (mBlkIo[Index], &gEfiBlockIoProtocolGuid, (VOID **)&BlkIo);
if (!EFI_ERROR (Status)) {
if (BlkIo->Media->RemovableMedia) {
gBS->DisconnectController (mBlkIo[Index], NULL, NULL);
gBS->ConnectController (mBlkIo[Index], NULL, NULL, TRUE);
Update = TRUE;
}
}
}
if (Update) {
// In case we caused media to be detected that contains a partition (SD Card, ...) rescan
if (mBlkIo != NULL) {
FreePool (mBlkIo);
}
gBS->LocateHandleBuffer (ByProtocol, &gEfiBlockIoProtocolGuid, NULL, &mBlkIoCount, &mBlkIo);
}
if (mFv != NULL) {
FreePool (mFv);
}
@@ -406,7 +433,7 @@ EblFileDevicePath (
Status = gBS->HandleProtocol (File->EfiHandle, &gEfiBlockIoProtocolGuid, (VOID **)&BlkIo);
if (!EFI_ERROR (Status)) {
CopyMem (&File->FsBlockIoMedia, BlkIo->Media, sizeof (EFI_BLOCK_IO_MEDIA));
File->FsBlockIoMedia = BlkIo->Media;
// If we are not opening the device this will get over written with file info
File->MaxPosition = MultU64x32 (BlkIo->Media->LastBlock + 1, BlkIo->Media->BlockSize);
@@ -1395,7 +1422,7 @@ EfiRead (
case EfiOpenBlockIo:
Status = gBS->HandleProtocol(File->EfiHandle, &gEfiDiskIoProtocolGuid, (VOID **)&DiskIo);
if (!EFI_ERROR(Status)) {
Status = DiskIo->ReadDisk(DiskIo, File->FsBlockIoMedia.MediaId, File->DiskOffset + File->CurrentPosition, *BufferSize, Buffer);
Status = DiskIo->ReadDisk(DiskIo, File->FsBlockIoMedia->MediaId, File->DiskOffset + File->CurrentPosition, *BufferSize, Buffer);
}
File->CurrentPosition += *BufferSize;
break;
@@ -1537,7 +1564,7 @@ EfiWrite (
Status = gBS->HandleProtocol (File->EfiHandle, &gEfiDiskIoProtocolGuid, (VOID **)&DiskIo);
if (!EFI_ERROR(Status)) {
Status = DiskIo->WriteDisk (DiskIo, File->FsBlockIoMedia.MediaId, File->DiskOffset + File->CurrentPosition, *BufferSize, Buffer);
Status = DiskIo->WriteDisk (DiskIo, File->FsBlockIoMedia->MediaId, File->DiskOffset + File->CurrentPosition, *BufferSize, Buffer);
}
File->CurrentPosition += *BufferSize;
break;
@@ -1608,7 +1635,7 @@ ExpandPath (
CHAR8 *NewPath;
CHAR8 *Work, *Start, *End;
UINTN StrLen;
UINTN i;
INTN i;
if (Cwd == NULL || Path == NULL) {
return NULL;