* [PATCH v5 1/3] MdeModulePkg: Replace with UFS_UNIT_DESC to fix timeout problem
2021-12-22 6:48 [PATCH v5 0/3] MdeModulePkg: Fix UfsBlockIoPei timing problem VincentX Ke
@ 2021-12-22 6:48 ` VincentX Ke
2021-12-22 6:48 ` [PATCH v5 2/3] MdeModulePkg: Refactoring UFS DME request and fix timing problem VincentX Ke
2021-12-22 6:48 ` [PATCH v5 3/3] MdeModulePkg: Put off UFS HCS.DP checking to " VincentX Ke
2 siblings, 0 replies; 4+ messages in thread
From: VincentX Ke @ 2021-12-22 6:48 UTC (permalink / raw)
To: devel; +Cc: VincentX Ke, Hao A Wu, Ray Ni, Ian Chiu, Maggie Chu
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3714
Replace with UFS_UNIT_DESC to fix response timeout problem.
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Ian Chiu <Ian.chiu@intel.com>
Cc: Maggie Chu <maggie.chu@intel.com>
Signed-off-by: VincentX Ke <vincentx.ke@intel.com>
---
.../Bus/Ufs/UfsBlockIoPei/UfsBlockIoPei.c | 23 +++++++++----------
1 file changed, 11 insertions(+), 12 deletions(-)
diff --git a/MdeModulePkg/Bus/Ufs/UfsBlockIoPei/UfsBlockIoPei.c b/MdeModulePkg/Bus/Ufs/UfsBlockIoPei/UfsBlockIoPei.c
index b331c0f3e3..b8651ff998 100644
--- a/MdeModulePkg/Bus/Ufs/UfsBlockIoPei/UfsBlockIoPei.c
+++ b/MdeModulePkg/Bus/Ufs/UfsBlockIoPei/UfsBlockIoPei.c
@@ -1,6 +1,6 @@
/** @file
- Copyright (c) 2014 - 2019, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2014 - 2021, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@@ -1037,9 +1037,9 @@ InitializeUfsBlockIoPeim (
UFS_PEIM_HC_PRIVATE_DATA *Private;
EDKII_UFS_HOST_CONTROLLER_PPI *UfsHcPpi;
UINT32 Index;
- UFS_CONFIG_DESC Config;
UINTN MmioBase;
UINT8 Controller;
+ UFS_UNIT_DESC UnitDescriptor;
//
// Shadow this PEIM to run from memory
@@ -1126,19 +1126,18 @@ InitializeUfsBlockIoPeim (
}
//
- // Get Ufs Device's Lun Info by reading Configuration Descriptor.
+ // Check if 8 common luns are active and set corresponding bit mask.
//
- Status = UfsRwDeviceDesc (Private, TRUE, UfsConfigDesc, 0, 0, &Config, sizeof (UFS_CONFIG_DESC));
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_ERROR, "Ufs Get Configuration Descriptor Error, Status = %r\n", Status));
- Controller++;
- continue;
- }
-
for (Index = 0; Index < UFS_PEIM_MAX_LUNS; Index++) {
- if (Config.UnitDescConfParams[Index].LunEn != 0) {
- Private->Luns.BitMask |= (BIT0 << Index);
+ Status = UfsRwDeviceDesc (Private, TRUE, UfsUnitDesc, (UINT8)Index, 0, &UnitDescriptor, sizeof (UFS_UNIT_DESC));
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "Fail to read UFS Unit Descriptor, Index = %X, Status = %r\n", Index, Status));
+ continue;
+ }
+
+ if (UnitDescriptor.LunEn == 0x1) {
DEBUG ((DEBUG_INFO, "Ufs %d Lun %d is enabled\n", Controller, Index));
+ Private->Luns.BitMask |= (BIT0 << Index);
}
}
--
2.31.1.windows.1
^ permalink raw reply related [flat|nested] 4+ messages in thread* [PATCH v5 2/3] MdeModulePkg: Refactoring UFS DME request and fix timing problem
2021-12-22 6:48 [PATCH v5 0/3] MdeModulePkg: Fix UfsBlockIoPei timing problem VincentX Ke
2021-12-22 6:48 ` [PATCH v5 1/3] MdeModulePkg: Replace with UFS_UNIT_DESC to fix timeout problem VincentX Ke
@ 2021-12-22 6:48 ` VincentX Ke
2021-12-22 6:48 ` [PATCH v5 3/3] MdeModulePkg: Put off UFS HCS.DP checking to " VincentX Ke
2 siblings, 0 replies; 4+ messages in thread
From: VincentX Ke @ 2021-12-22 6:48 UTC (permalink / raw)
To: devel; +Cc: VincentX Ke, Hao A Wu, Ray Ni, Ian Chiu, Maggie Chu
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3775
Refactoring UFS DME request function and retry up to 5 times.
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Ian Chiu <Ian.chiu@intel.com>
Cc: Maggie Chu <maggie.chu@intel.com>
Signed-off-by: VincentX Ke <vincentx.ke@intel.com>
---
MdeModulePkg/Bus/Ufs/UfsBlockIoPei/UfsHci.c | 299 +++++++++++---------
1 file changed, 172 insertions(+), 127 deletions(-)
diff --git a/MdeModulePkg/Bus/Ufs/UfsBlockIoPei/UfsHci.c b/MdeModulePkg/Bus/Ufs/UfsBlockIoPei/UfsHci.c
index 2baa57593e..e2099c22e8 100644
--- a/MdeModulePkg/Bus/Ufs/UfsBlockIoPei/UfsHci.c
+++ b/MdeModulePkg/Bus/Ufs/UfsBlockIoPei/UfsHci.c
@@ -1,6 +1,6 @@
/** @file
- Copyright (c) 2014 - 2018, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2014 - 2021, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@@ -747,60 +747,91 @@ UfsStopExecCmd (
}
/**
- Read or write specified device descriptor of a UFS device.
+ Extracts return data from query response upiu.
- @param[in] Private The pointer to the UFS_PEIM_HC_PRIVATE_DATA data structure.
- @param[in] Read The boolean variable to show r/w direction.
- @param[in] DescId The ID of device descriptor.
- @param[in] Index The Index of device descriptor.
- @param[in] Selector The Selector of device descriptor.
- @param[in, out] Descriptor The buffer of device descriptor to be read or written.
- @param[in] DescSize The size of device descriptor buffer.
+ @param[in] Packet Pointer to the UFS_DEVICE_MANAGEMENT_REQUEST_PACKET.
+ @param[in] QueryResp Pointer to the query response.
- @retval EFI_SUCCESS The device descriptor was read/written successfully.
- @retval EFI_DEVICE_ERROR A device error occurred while attempting to r/w the device descriptor.
- @retval EFI_TIMEOUT A timeout occurred while waiting for the completion of r/w the device descriptor.
+ @retval EFI_INVALID_PARAMETER Packet or QueryResp are empty or opcode is invalid.
+ @retval EFI_DEVICE_ERROR Data returned from device is invalid.
+ @retval EFI_SUCCESS Data extracted.
**/
EFI_STATUS
-UfsRwDeviceDesc (
- IN UFS_PEIM_HC_PRIVATE_DATA *Private,
- IN BOOLEAN Read,
- IN UINT8 DescId,
- IN UINT8 Index,
- IN UINT8 Selector,
- IN OUT VOID *Descriptor,
- IN UINT32 DescSize
+UfsGetReturnDataFromQueryResponse (
+ IN UFS_DEVICE_MANAGEMENT_REQUEST_PACKET *Packet,
+ IN UTP_QUERY_RESP_UPIU *QueryResp
)
{
- EFI_STATUS Status;
- UFS_DEVICE_MANAGEMENT_REQUEST_PACKET Packet;
- UINT8 Slot;
- UTP_TRD *Trd;
- UINTN Address;
- UTP_QUERY_RESP_UPIU *QueryResp;
- UINT8 *CmdDescBase;
- UINT32 CmdDescSize;
- UINT16 ReturnDataSize;
+ UINT16 ReturnDataSize;
- ZeroMem (&Packet, sizeof (UFS_DEVICE_MANAGEMENT_REQUEST_PACKET));
+ ReturnDataSize = 0;
- if (Read) {
- Packet.DataDirection = UfsDataIn;
- Packet.InDataBuffer = Descriptor;
- Packet.InTransferLength = DescSize;
- Packet.Opcode = UtpQueryFuncOpcodeRdDesc;
- } else {
- Packet.DataDirection = UfsDataOut;
- Packet.OutDataBuffer = Descriptor;
- Packet.OutTransferLength = DescSize;
- Packet.Opcode = UtpQueryFuncOpcodeWrDesc;
+ if ((Packet == NULL) || (QueryResp == NULL)) {
+ return EFI_INVALID_PARAMETER;
}
- Packet.DescId = DescId;
- Packet.Index = Index;
- Packet.Selector = Selector;
- Packet.Timeout = UFS_TIMEOUT;
+ switch (Packet->Opcode) {
+ case UtpQueryFuncOpcodeRdDesc:
+ ReturnDataSize = QueryResp->Tsf.Length;
+ SwapLittleEndianToBigEndian ((UINT8 *)&ReturnDataSize, sizeof (UINT16));
+ //
+ // Make sure the hardware device does not return more data than expected.
+ //
+ if (ReturnDataSize > Packet->InTransferLength) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ CopyMem (Packet->InDataBuffer, (QueryResp + 1), ReturnDataSize);
+ Packet->InTransferLength = ReturnDataSize;
+ break;
+ case UtpQueryFuncOpcodeWrDesc:
+ ReturnDataSize = QueryResp->Tsf.Length;
+ SwapLittleEndianToBigEndian ((UINT8 *)&ReturnDataSize, sizeof (UINT16));
+ Packet->OutTransferLength = ReturnDataSize;
+ break;
+ case UtpQueryFuncOpcodeRdFlag:
+ case UtpQueryFuncOpcodeSetFlag:
+ case UtpQueryFuncOpcodeClrFlag:
+ case UtpQueryFuncOpcodeTogFlag:
+ //
+ // The 'FLAG VALUE' field is at byte offset 3 of QueryResp->Tsf.Value
+ //
+ *((UINT8 *)(Packet->OutDataBuffer)) = *((UINT8 *)&(QueryResp->Tsf.Value) + 3);
+ break;
+ default:
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Creates Transfer Request descriptor and sends Query Request to the device.
+
+ @param[in] Private Pointer to the UFS_PEIM_HC_PRIVATE_DATA.
+ @param[in] Packet Pointer to the UFS_DEVICE_MANAGEMENT_REQUEST_PACKET.
+
+ @retval EFI_SUCCESS The device descriptor was read/written successfully.
+ @retval EFI_INVALID_PARAMETER The DescId, Index and Selector fields in Packet are invalid
+ combination to point to a type of UFS device descriptor.
+ @retval EFI_DEVICE_ERROR A device error occurred while attempting to r/w the device descriptor.
+ @retval EFI_TIMEOUT A timeout occurred while waiting for the completion of r/w the device descriptor.
+
+**/
+EFI_STATUS
+UfsSendDmRequestRetry (
+ IN UFS_PEIM_HC_PRIVATE_DATA *Private,
+ IN UFS_DEVICE_MANAGEMENT_REQUEST_PACKET *Packet
+ )
+{
+ UINT8 Slot;
+ EFI_STATUS Status;
+ UTP_TRD *Trd;
+ UINTN Address;
+ UTP_QUERY_RESP_UPIU *QueryResp;
+ UINT8 *CmdDescBase;
+ UINT32 CmdDescSize;
//
// Find out which slot of transfer request list is available.
@@ -814,8 +845,9 @@ UfsRwDeviceDesc (
//
// Fill transfer request descriptor to this slot.
//
- Status = UfsCreateDMCommandDesc (Private, &Packet, Trd);
+ Status = UfsCreateDMCommandDesc (Private, Packet, Trd);
if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "Failed to create DM command descriptor\n"));
return Status;
}
@@ -835,43 +867,116 @@ UfsRwDeviceDesc (
// Wait for the completion of the transfer request.
//
Address = Private->UfsHcBase + UFS_HC_UTRLDBR_OFFSET;
- Status = UfsWaitMemSet (Address, BIT0 << Slot, 0, Packet.Timeout);
+ Status = UfsWaitMemSet (Address, (BIT0 << Slot), 0, Packet->Timeout);
if (EFI_ERROR (Status)) {
goto Exit;
}
if (QueryResp->QueryResp != 0) {
+ DEBUG ((DEBUG_ERROR, "Failed to send query request, OCS = %X, QueryResp = %X\n", Trd->Ocs, QueryResp->QueryResp));
DumpQueryResponseResult (QueryResp->QueryResp);
Status = EFI_DEVICE_ERROR;
goto Exit;
}
- if (Trd->Ocs == 0) {
- ReturnDataSize = QueryResp->Tsf.Length;
- SwapLittleEndianToBigEndian ((UINT8 *)&ReturnDataSize, sizeof (UINT16));
+ Status = UfsGetReturnDataFromQueryResponse (Packet, QueryResp);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "Failed to get return data from query response\n"));
+ goto Exit;
+ }
- if (Read) {
- //
- // Make sure the hardware device does not return more data than expected.
- //
- if (ReturnDataSize > Packet.InTransferLength) {
- Status = EFI_DEVICE_ERROR;
- goto Exit;
- }
+Exit:
+ UfsStopExecCmd (Private, Slot);
+ UfsPeimFreeMem (Private->Pool, CmdDescBase, CmdDescSize);
- CopyMem (Packet.InDataBuffer, (QueryResp + 1), ReturnDataSize);
- Packet.InTransferLength = ReturnDataSize;
- } else {
- Packet.OutTransferLength = ReturnDataSize;
+ return Status;
+}
+
+/**
+ Sends Query Request to the device. Query is sent until device responds correctly or counter runs out.
+
+ @param[in] Private Pointer to the UFS_PEIM_HC_PRIVATE_DATA.
+ @param[in] Packet Pointer to the UFS_DEVICE_MANAGEMENT_REQUEST_PACKET.
+
+ @retval EFI_SUCCESS The device responded correctly to the Query request.
+ @retval EFI_INVALID_PARAMETER The DescId, Index and Selector fields in Packet are invalid
+ combination to point to a type of UFS device descriptor.
+ @retval EFI_DEVICE_ERROR A device error occurred while waiting for the response from the device.
+ @retval EFI_TIMEOUT A timeout occurred while waiting for the completion of the operation.
+
+**/
+EFI_STATUS
+UfsSendDmRequest (
+ IN UFS_PEIM_HC_PRIVATE_DATA *Private,
+ IN UFS_DEVICE_MANAGEMENT_REQUEST_PACKET *Packet
+ )
+{
+ EFI_STATUS Status;
+ UINT8 Retry;
+
+ Status = EFI_SUCCESS;
+
+ for (Retry = 0; Retry < 5; Retry++) {
+ Status = UfsSendDmRequestRetry (Private, Packet);
+ if (!EFI_ERROR (Status)) {
+ return EFI_SUCCESS;
}
+ }
+
+ DEBUG ((DEBUG_ERROR, "Failed to get response from the device after %d retries\n", Retry));
+ return Status;
+}
+
+/**
+ Read or write specified device descriptor of a UFS device.
+
+ @param[in] Private The pointer to the UFS_PEIM_HC_PRIVATE_DATA data structure.
+ @param[in] Read The boolean variable to show r/w direction.
+ @param[in] DescId The ID of device descriptor.
+ @param[in] Index The Index of device descriptor.
+ @param[in] Selector The Selector of device descriptor.
+ @param[in, out] Descriptor The buffer of device descriptor to be read or written.
+ @param[in] DescSize The size of device descriptor buffer.
+
+ @retval EFI_SUCCESS The device descriptor was read/written successfully.
+ @retval EFI_DEVICE_ERROR A device error occurred while attempting to r/w the device descriptor.
+ @retval EFI_TIMEOUT A timeout occurred while waiting for the completion of r/w the device descriptor.
+
+**/
+EFI_STATUS
+UfsRwDeviceDesc (
+ IN UFS_PEIM_HC_PRIVATE_DATA *Private,
+ IN BOOLEAN Read,
+ IN UINT8 DescId,
+ IN UINT8 Index,
+ IN UINT8 Selector,
+ IN OUT VOID *Descriptor,
+ IN UINT32 DescSize
+ )
+{
+ EFI_STATUS Status;
+ UFS_DEVICE_MANAGEMENT_REQUEST_PACKET Packet;
+
+ ZeroMem (&Packet, sizeof (UFS_DEVICE_MANAGEMENT_REQUEST_PACKET));
+
+ if (Read) {
+ Packet.DataDirection = UfsDataIn;
+ Packet.InDataBuffer = Descriptor;
+ Packet.InTransferLength = DescSize;
+ Packet.Opcode = UtpQueryFuncOpcodeRdDesc;
} else {
- Status = EFI_DEVICE_ERROR;
+ Packet.DataDirection = UfsDataOut;
+ Packet.OutDataBuffer = Descriptor;
+ Packet.OutTransferLength = DescSize;
+ Packet.Opcode = UtpQueryFuncOpcodeWrDesc;
}
-Exit:
- UfsStopExecCmd (Private, Slot);
- UfsPeimFreeMem (Private->Pool, CmdDescBase, CmdDescSize);
+ Packet.DescId = DescId;
+ Packet.Index = Index;
+ Packet.Selector = Selector;
+ Packet.Timeout = UFS_TIMEOUT;
+ Status = UfsSendDmRequest (Private, &Packet);
return Status;
}
@@ -898,12 +1003,6 @@ UfsRwFlags (
{
EFI_STATUS Status;
UFS_DEVICE_MANAGEMENT_REQUEST_PACKET Packet;
- UINT8 Slot;
- UTP_TRD *Trd;
- UINTN Address;
- UTP_QUERY_RESP_UPIU *QueryResp;
- UINT8 *CmdDescBase;
- UINT32 CmdDescSize;
if (Value == NULL) {
return EFI_INVALID_PARAMETER;
@@ -931,62 +1030,8 @@ UfsRwFlags (
Packet.Selector = 0;
Packet.Timeout = UFS_TIMEOUT;
- //
- // Find out which slot of transfer request list is available.
- //
- Status = UfsFindAvailableSlotInTrl (Private, &Slot);
- if (EFI_ERROR (Status)) {
- return Status;
- }
-
- //
- // Fill transfer request descriptor to this slot.
- //
- Trd = ((UTP_TRD *)Private->UtpTrlBase) + Slot;
- Status = UfsCreateDMCommandDesc (Private, &Packet, Trd);
- if (EFI_ERROR (Status)) {
- return Status;
- }
-
- //
- // Check the transfer request result.
- //
- CmdDescBase = (UINT8 *)(UINTN)(LShiftU64 ((UINT64)Trd->UcdBaU, 32) | LShiftU64 ((UINT64)Trd->UcdBa, 7));
- QueryResp = (UTP_QUERY_RESP_UPIU *)(CmdDescBase + Trd->RuO * sizeof (UINT32));
- CmdDescSize = Trd->RuO * sizeof (UINT32) + Trd->RuL * sizeof (UINT32);
-
- //
- // Start to execute the transfer request.
- //
- UfsStartExecCmd (Private, Slot);
-
- //
- // Wait for the completion of the transfer request.
- //
- Address = Private->UfsHcBase + UFS_HC_UTRLDBR_OFFSET;
- Status = UfsWaitMemSet (Address, BIT0 << Slot, 0, Packet.Timeout);
- if (EFI_ERROR (Status)) {
- goto Exit;
- }
-
- if (QueryResp->QueryResp != 0) {
- DumpQueryResponseResult (QueryResp->QueryResp);
- Status = EFI_DEVICE_ERROR;
- goto Exit;
- }
-
- if (Trd->Ocs == 0) {
- //
- // The 'FLAG VALUE' field is at byte offset 3 of QueryResp->Tsf.Value
- //
- *Value = *((UINT8 *)&(QueryResp->Tsf.Value) + 3);
- } else {
- Status = EFI_DEVICE_ERROR;
- }
-
-Exit:
- UfsStopExecCmd (Private, Slot);
- UfsPeimFreeMem (Private->Pool, CmdDescBase, CmdDescSize);
+ Status = UfsSendDmRequest (Private, &Packet);
+ *Value = *((UINT8 *)(Packet.OutDataBuffer));
return Status;
}
--
2.31.1.windows.1
^ permalink raw reply related [flat|nested] 4+ messages in thread* [PATCH v5 3/3] MdeModulePkg: Put off UFS HCS.DP checking to fix timing problem
2021-12-22 6:48 [PATCH v5 0/3] MdeModulePkg: Fix UfsBlockIoPei timing problem VincentX Ke
2021-12-22 6:48 ` [PATCH v5 1/3] MdeModulePkg: Replace with UFS_UNIT_DESC to fix timeout problem VincentX Ke
2021-12-22 6:48 ` [PATCH v5 2/3] MdeModulePkg: Refactoring UFS DME request and fix timing problem VincentX Ke
@ 2021-12-22 6:48 ` VincentX Ke
2 siblings, 0 replies; 4+ messages in thread
From: VincentX Ke @ 2021-12-22 6:48 UTC (permalink / raw)
To: devel; +Cc: VincentX Ke, Hao A Wu, Ray Ni, Ian Chiu, Maggie Chu
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3776
Put off UFS HCS.DP (Device Attached) checking
until UfsDeviceDetection() to fix timing problem.
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Ian Chiu <Ian.chiu@intel.com>
Cc: Maggie Chu <maggie.chu@intel.com>
Signed-off-by: VincentX Ke <vincentx.ke@intel.com>
---
MdeModulePkg/Bus/Ufs/UfsBlockIoPei/UfsHci.c | 47 +++++++++------------
1 file changed, 19 insertions(+), 28 deletions(-)
diff --git a/MdeModulePkg/Bus/Ufs/UfsBlockIoPei/UfsHci.c b/MdeModulePkg/Bus/Ufs/UfsBlockIoPei/UfsHci.c
index e2099c22e8..ddbc32dac7 100644
--- a/MdeModulePkg/Bus/Ufs/UfsBlockIoPei/UfsHci.c
+++ b/MdeModulePkg/Bus/Ufs/UfsBlockIoPei/UfsHci.c
@@ -1352,23 +1352,6 @@ UfsExecUicCommands (
}
}
- //
- // Check value of HCS.DP and make sure that there is a device attached to the Link.
- //
- Address = UfsHcBase + UFS_HC_STATUS_OFFSET;
- Data = MmioRead32 (Address);
- if ((Data & UFS_HC_HCS_DP) == 0) {
- Address = UfsHcBase + UFS_HC_IS_OFFSET;
- Status = UfsWaitMemSet (Address, UFS_HC_IS_ULSS, UFS_HC_IS_ULSS, UFS_TIMEOUT);
- if (EFI_ERROR (Status)) {
- return EFI_DEVICE_ERROR;
- }
-
- return EFI_NOT_FOUND;
- }
-
- DEBUG ((DEBUG_INFO, "UfsblockioPei: found a attached UFS device\n"));
-
return EFI_SUCCESS;
}
@@ -1442,6 +1425,8 @@ UfsDeviceDetection (
)
{
UINTN Retry;
+ UINTN Address;
+ UINT32 Data;
EFI_STATUS Status;
//
@@ -1450,22 +1435,28 @@ UfsDeviceDetection (
//
for (Retry = 0; Retry < 3; Retry++) {
Status = UfsExecUicCommands (Private, UfsUicDmeLinkStartup, 0, 0, 0);
- if (!EFI_ERROR (Status)) {
- break;
+ if (EFI_ERROR (Status)) {
+ return EFI_DEVICE_ERROR;
}
- if (Status == EFI_NOT_FOUND) {
- continue;
+ //
+ // Check value of HCS.DP and make sure that there is a device attached to the Link
+ //
+ Address = Private->UfsHcBase + UFS_HC_STATUS_OFFSET;
+ Data = MmioRead32 (Address);
+ if ((Data & UFS_HC_HCS_DP) == 0) {
+ Address = Private->UfsHcBase + UFS_HC_IS_OFFSET;
+ Status = UfsWaitMemSet (Address, UFS_HC_IS_ULSS, UFS_HC_IS_ULSS, UFS_TIMEOUT);
+ if (EFI_ERROR (Status)) {
+ return EFI_DEVICE_ERROR;
+ }
+ } else {
+ DEBUG ((DEBUG_INFO, "UfsblockioPei: found a attached UFS device\n"));
+ return EFI_SUCCESS;
}
-
- return EFI_DEVICE_ERROR;
}
- if (Retry == 3) {
- return EFI_NOT_FOUND;
- }
-
- return EFI_SUCCESS;
+ return EFI_NOT_FOUND;
}
/**
--
2.31.1.windows.1
^ permalink raw reply related [flat|nested] 4+ messages in thread