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authorJun Nie <jun.nie@linaro.org>2017-07-04 23:43:16 +0800
committerLeif Lindholm <leif.lindholm@linaro.org>2017-07-05 16:07:54 +0100
commit7bb5fad566afa2dd9feef5ae1ecc658d627f5ac2 (patch)
tree08bbe030e037ecd0c704fba0520100997f93faf7
parente4129b0e5897d76885170bec9da996b266f185f9 (diff)
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EmbeddedPkg/MmcDxe: Align the ExtCSD buffer
ExtCSD structure may be read via DMA. So align it to page to avoid data corruption. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jun Nie <jun.nie@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
-rw-r--r--EmbeddedPkg/Universal/MmcDxe/Mmc.c3
-rw-r--r--EmbeddedPkg/Universal/MmcDxe/Mmc.h2
-rw-r--r--EmbeddedPkg/Universal/MmcDxe/MmcIdentification.c19
3 files changed, 18 insertions, 6 deletions
diff --git a/EmbeddedPkg/Universal/MmcDxe/Mmc.c b/EmbeddedPkg/Universal/MmcDxe/Mmc.c
index 570e1d2e43..3b9dc18727 100644
--- a/EmbeddedPkg/Universal/MmcDxe/Mmc.c
+++ b/EmbeddedPkg/Universal/MmcDxe/Mmc.c
@@ -171,6 +171,9 @@ EFI_STATUS DestroyMmcHostInstance (
if (MmcHostInstance->BlockIo.Media) {
FreePool(MmcHostInstance->BlockIo.Media);
}
+ if (MmcHostInstance->CardInfo.ECSDData) {
+ FreePages (MmcHostInstance->CardInfo.ECSDData, EFI_SIZE_TO_PAGES (sizeof (ECSD)));
+ }
FreePool (MmcHostInstance);
return Status;
diff --git a/EmbeddedPkg/Universal/MmcDxe/Mmc.h b/EmbeddedPkg/Universal/MmcDxe/Mmc.h
index 8a7d5a3de3..f3e56ff3a6 100644
--- a/EmbeddedPkg/Universal/MmcDxe/Mmc.h
+++ b/EmbeddedPkg/Universal/MmcDxe/Mmc.h
@@ -319,7 +319,7 @@ typedef struct {
OCR OCRData;
CID CIDData;
CSD CSDData;
- ECSD ECSDData; // MMC V4 extended card specific
+ ECSD *ECSDData; // MMC V4 extended card specific
} CARD_INFO;
typedef struct _MMC_HOST_INSTANCE {
diff --git a/EmbeddedPkg/Universal/MmcDxe/MmcIdentification.c b/EmbeddedPkg/Universal/MmcDxe/MmcIdentification.c
index c28207e2a2..7f74c54696 100644
--- a/EmbeddedPkg/Universal/MmcDxe/MmcIdentification.c
+++ b/EmbeddedPkg/Universal/MmcDxe/MmcIdentification.c
@@ -13,6 +13,7 @@
**/
#include <Library/BaseMemoryLib.h>
+#include <Library/MemoryAllocationLib.h>
#include <Library/TimerLib.h>
#include "Mmc.h"
@@ -210,15 +211,19 @@ EmmcIdentificationMode (
}
// Fetch ECSD
+ MmcHostInstance->CardInfo.ECSDData = AllocatePages (EFI_SIZE_TO_PAGES (sizeof (ECSD)));
+ if (MmcHostInstance->CardInfo.ECSDData == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
Status = Host->SendCommand (Host, MMC_CMD8, 0);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): ECSD fetch error, Status=%r.\n", Status));
}
- Status = Host->ReadBlockData (Host, 0, 512, (UINT32 *)&(MmcHostInstance->CardInfo.ECSDData));
+ Status = Host->ReadBlockData (Host, 0, 512, (UINT32 *)MmcHostInstance->CardInfo.ECSDData);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): ECSD read error, Status=%r.\n", Status));
- return Status;
+ goto FreePageExit;
}
// Make sure device exiting data mode
@@ -226,7 +231,7 @@ EmmcIdentificationMode (
Status = EmmcGetDeviceState (MmcHostInstance, &State);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): Failed to get device state, Status=%r.\n", Status));
- return Status;
+ goto FreePageExit;
}
} while (State == EMMC_DATA_STATE);
@@ -237,12 +242,16 @@ EmmcIdentificationMode (
Media->LogicalBlocksPerPhysicalBlock = 1;
Media->IoAlign = 4;
// Compute last block using bits [215:212] of the ECSD
- Media->LastBlock = MmcHostInstance->CardInfo.ECSDData.SECTOR_COUNT - 1; // eMMC isn't supposed to report this for
+ Media->LastBlock = MmcHostInstance->CardInfo.ECSDData->SECTOR_COUNT - 1; // eMMC isn't supposed to report this for
// Cards <2GB in size, but the model does.
// Setup card type
MmcHostInstance->CardInfo.CardType = EMMC_CARD;
return EFI_SUCCESS;
+
+FreePageExit:
+ FreePages (MmcHostInstance->CardInfo.ECSDData, EFI_SIZE_TO_PAGES (sizeof (ECSD)));
+ return Status;
}
STATIC
@@ -258,7 +267,7 @@ InitializeEmmcDevice (
UINT32 TimingMode[4] = {EMMCHS52DDR1V2, EMMCHS52DDR1V8, EMMCHS52, EMMCHS26};
Host = MmcHostInstance->MmcHost;
- ECSDData = &MmcHostInstance->CardInfo.ECSDData;
+ ECSDData = MmcHostInstance->CardInfo.ECSDData;
if (ECSDData->DEVICE_TYPE == EMMCBACKWARD)
return EFI_SUCCESS;