Many ARM based SoCs have integrated SDHCI controllers, and often,
these implementations deviate in subtle ways from the pertinent
specifications. On the one hand, these deviations are quite easy
to work around, but on the other hand, having a collection of SoC
specific workarounds in the generic driver stack is undesirable.
So let's introduce an optional SD/MMC override protocol that we
can invoke at the appropriate moments in the device initialization.
That way, the workaround itself remains platform specific, but we
can still use the generic driver stack on such platforms.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
MdeModulePkg/Include/Protocol/SdMmcOverride.h | 103 ++++++++++++++++++++
MdeModulePkg/MdeModulePkg.dec | 3 +
2 files changed, 106 insertions(+)
diff --git a/MdeModulePkg/Include/Protocol/SdMmcOverride.h b/MdeModulePkg/Include/Protocol/SdMmcOverride.h
new file mode 100644
index 000000000000..af57988f5625
--- /dev/null
+++ b/MdeModulePkg/Include/Protocol/SdMmcOverride.h
@@ -0,0 +1,103 @@
+/** @file
+ Protocol to describe overrides required to support non-standard SDHCI
+ implementations
+
+ Copyright (c) 2017, Linaro, Ltd. All rights reserved.<BR>
+
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef __SD_MMC_OVERRIDE_H__
+#define __SD_MMC_OVERRIDE_H__
+
+#include <Protocol/SdMmcPassThru.h>
+
+#define EDKII_SD_MMC_OVERRIDE_PROTOCOL_GUID \
+ { 0xeaf9e3c1, 0xc9cd, 0x46db, { 0xa5, 0xe5, 0x5a, 0x12, 0x4c, 0x83, 0x23, 0x23 } }
+
+#define EDKII_SD_MMC_OVERRIDE_PROTOCOL_VERSION 0x1
+
+typedef struct _EDKII_SD_MMC_OVERRIDE EDKII_SD_MMC_OVERRIDE;
+
+typedef enum {
+ EdkiiSdMmcResetPre,
+ EdkiiSdMmcResetPost,
+ EdkiiSdMmcInitHostPre,
+ EdkiiSdMmcInitHostPost,
+} EDKII_SD_MMC_PHASE_TYPE;
+
+/**
+
+ Override function for SDHCI capability bits
+
+ @param[in] PassThru A pointer to the
+ EFI_SD_MMC_PASS_THRU_PROTOCOL instance.
+ @param[in] ControllerHandle The EFI_HANDLE of the controller.
+ @param[in] Slot The 0 based slot index.
+ @param[in,out] SdMmcHcSlotCapability The SDHCI capability structure.
+
+ @retval EFI_SUCCESS The override function completed successfully.
+ @retval EFI_NOT_FOUND The specified controller or slot does not exist.
+ @retval EFI_INVALID_PARAMETER SdMmcHcSlotCapability is NULL
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI * EDKII_SD_MMC_CAPABILITY) (
+ IN EFI_SD_MMC_PASS_THRU_PROTOCOL *PassThru,
+ IN EFI_HANDLE ControllerHandle,
+ IN UINT8 Slot,
+ IN OUT UINT64 *SdMmcHcSlotCapability
+ );
+
+/**
+
+ Override function for SDHCI controller operations
+
+ @param[in] PassThru A pointer to the
+ EFI_SD_MMC_PASS_THRU_PROTOCOL instance.
+ @param[in] ControllerHandle The EFI_HANDLE of the controller.
+ @param[in] Slot The 0 based slot index.
+ @param[in,out] PhaseType The type of operation and whether the
+ hook is invoked right before (pre) or
+ right after (post)
+
+ @retval EFI_SUCCESS The override function completed successfully.
+ @retval EFI_NOT_FOUND The specified controller or slot does not exist.
+ @retval EFI_INVALID_PARAMETER HookType is invalid
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI * EDKII_SD_MMC_NOTIFY_PHASE) (
+ IN EFI_SD_MMC_PASS_THRU_PROTOCOL *PassThru,
+ IN EFI_HANDLE ControllerHandle,
+ IN UINT8 Slot,
+ IN EDKII_SD_MMC_PHASE_TYPE PhaseType
+ );
+
+struct _EDKII_SD_MMC_OVERRIDE {
+ //
+ // Protocol version of this implementation
+ //
+ UINTN Version;
+ //
+ // Callback to override SD/MMC host controller capability bits
+ //
+ EDKII_SD_MMC_CAPABILITY Capability;
+ //
+ // Callback to invoke SD/MMC override hooks
+ //
+ EDKII_SD_MMC_NOTIFY_PHASE NotifyPhase;
+};
+
+extern EFI_GUID gEdkiiSdMmcOverrideProtocolGuid;
+
+#endif
diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index 856d67aceb21..64ceea029f94 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -562,6 +562,9 @@ [Protocols]
## Include/Protocol/SmmMemoryAttribute.h
gEdkiiSmmMemoryAttributeProtocolGuid = { 0x69b792ea, 0x39ce, 0x402d, { 0xa2, 0xa6, 0xf7, 0x21, 0xde, 0x35, 0x1d, 0xfe } }
+ ## Include/Protocol/SdMmcOverride.h
+ gEdkiiSdMmcOverrideProtocolGuid = { 0xeaf9e3c1, 0xc9cd, 0x46db, { 0xa5, 0xe5, 0x5a, 0x12, 0x4c, 0x83, 0x23, 0x23 } }
+
#
# [Error.gEfiMdeModulePkgTokenSpaceGuid]
# 0x80000001 | Invalid value provided.
--
2.11.0
_______________________________________________
edk2-devel mailing list
edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel
On 12/6/2017 2:01 AM, Ard Biesheuvel wrote:
> Many ARM based SoCs have integrated SDHCI controllers, and often,
> these implementations deviate in subtle ways from the pertinent
> specifications. On the one hand, these deviations are quite easy
> to work around, but on the other hand, having a collection of SoC
> specific workarounds in the generic driver stack is undesirable.
>
> So let's introduce an optional SD/MMC override protocol that we
> can invoke at the appropriate moments in the device initialization.
> That way, the workaround itself remains platform specific, but we
> can still use the generic driver stack on such platforms.
>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> ---
> MdeModulePkg/Include/Protocol/SdMmcOverride.h | 103 ++++++++++++++++++++
> MdeModulePkg/MdeModulePkg.dec | 3 +
> 2 files changed, 106 insertions(+)
>
> diff --git a/MdeModulePkg/Include/Protocol/SdMmcOverride.h b/MdeModulePkg/Include/Protocol/SdMmcOverride.h
> new file mode 100644
> index 000000000000..af57988f5625
> --- /dev/null
> +++ b/MdeModulePkg/Include/Protocol/SdMmcOverride.h
> @@ -0,0 +1,103 @@
> +/** @file
> + Protocol to describe overrides required to support non-standard SDHCI
> + implementations
> +
> + Copyright (c) 2017, Linaro, Ltd. All rights reserved.<BR>
> +
> + This program and the accompanying materials
> + are licensed and made available under the terms and conditions of the BSD License
> + which accompanies this distribution. The full text of the license may be found at
> + http://opensource.org/licenses/bsd-license.php
> +
> + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> + WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
> +
> +**/
> +
> +#ifndef __SD_MMC_OVERRIDE_H__
> +#define __SD_MMC_OVERRIDE_H__
> +
> +#include <Protocol/SdMmcPassThru.h>
> +
> +#define EDKII_SD_MMC_OVERRIDE_PROTOCOL_GUID \
> + { 0xeaf9e3c1, 0xc9cd, 0x46db, { 0xa5, 0xe5, 0x5a, 0x12, 0x4c, 0x83, 0x23, 0x23 } }
> +
> +#define EDKII_SD_MMC_OVERRIDE_PROTOCOL_VERSION 0x1
> +
> +typedef struct _EDKII_SD_MMC_OVERRIDE EDKII_SD_MMC_OVERRIDE;
> +
> +typedef enum {
> + EdkiiSdMmcResetPre,
> + EdkiiSdMmcResetPost,
> + EdkiiSdMmcInitHostPre,
> + EdkiiSdMmcInitHostPost,
> +} EDKII_SD_MMC_PHASE_TYPE;
> +
> +/**
> +
> + Override function for SDHCI capability bits
> +
> + @param[in] PassThru A pointer to the
> + EFI_SD_MMC_PASS_THRU_PROTOCOL instance.
> + @param[in] ControllerHandle The EFI_HANDLE of the controller.
> + @param[in] Slot The 0 based slot index.
> + @param[in,out] SdMmcHcSlotCapability The SDHCI capability structure.
> +
> + @retval EFI_SUCCESS The override function completed successfully.
> + @retval EFI_NOT_FOUND The specified controller or slot does not exist.
> + @retval EFI_INVALID_PARAMETER SdMmcHcSlotCapability is NULL
> +
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI * EDKII_SD_MMC_CAPABILITY) (
> + IN EFI_SD_MMC_PASS_THRU_PROTOCOL *PassThru,
By looking a bit deeper, I get confused about this parameter.
SdMmcOverride protocol is supposed to be used by SdMmcHostController
driver to produce SdMmcPassthru protocol.
But how does SdMmcOverride uses the not-yet-produced SdMmcPassthru
protocol? It's like a chicken-egg problem.
> + IN EFI_HANDLE ControllerHandle,
> + IN UINT8 Slot,
> + IN OUT UINT64 *SdMmcHcSlotCapability
> + );
> +
> +/**
> +
> + Override function for SDHCI controller operations
> +
> + @param[in] PassThru A pointer to the
> + EFI_SD_MMC_PASS_THRU_PROTOCOL instance.
> + @param[in] ControllerHandle The EFI_HANDLE of the controller.
> + @param[in] Slot The 0 based slot index.
> + @param[in,out] PhaseType The type of operation and whether the
> + hook is invoked right before (pre) or
> + right after (post)
> +
> + @retval EFI_SUCCESS The override function completed successfully.
> + @retval EFI_NOT_FOUND The specified controller or slot does not exist.
> + @retval EFI_INVALID_PARAMETER HookType is invalid
> +
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI * EDKII_SD_MMC_NOTIFY_PHASE) (
> + IN EFI_SD_MMC_PASS_THRU_PROTOCOL *PassThru,
> + IN EFI_HANDLE ControllerHandle,
> + IN UINT8 Slot,
> + IN EDKII_SD_MMC_PHASE_TYPE PhaseType
> + );
> +
> +struct _EDKII_SD_MMC_OVERRIDE {
> + //
> + // Protocol version of this implementation
> + //
> + UINTN Version;
> + //
> + // Callback to override SD/MMC host controller capability bits
> + //
> + EDKII_SD_MMC_CAPABILITY Capability;
> + //
> + // Callback to invoke SD/MMC override hooks
> + //
> + EDKII_SD_MMC_NOTIFY_PHASE NotifyPhase;
> +};
> +
> +extern EFI_GUID gEdkiiSdMmcOverrideProtocolGuid;
> +
> +#endif
> diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
> index 856d67aceb21..64ceea029f94 100644
> --- a/MdeModulePkg/MdeModulePkg.dec
> +++ b/MdeModulePkg/MdeModulePkg.dec
> @@ -562,6 +562,9 @@ [Protocols]
> ## Include/Protocol/SmmMemoryAttribute.h
> gEdkiiSmmMemoryAttributeProtocolGuid = { 0x69b792ea, 0x39ce, 0x402d, { 0xa2, 0xa6, 0xf7, 0x21, 0xde, 0x35, 0x1d, 0xfe } }
>
> + ## Include/Protocol/SdMmcOverride.h
> + gEdkiiSdMmcOverrideProtocolGuid = { 0xeaf9e3c1, 0xc9cd, 0x46db, { 0xa5, 0xe5, 0x5a, 0x12, 0x4c, 0x83, 0x23, 0x23 } }
> +
> #
> # [Error.gEfiMdeModulePkgTokenSpaceGuid]
> # 0x80000001 | Invalid value provided.
>
--
Thanks,
Ray
_______________________________________________
edk2-devel mailing list
edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel
It should be not needed for Capability, but may be needed for NotifyPhase.
Hao can explain more.
Thanks,
Star
-----Original Message-----
From: Ni, Ruiyu
Sent: Wednesday, December 6, 2017 11:22 AM
To: Ard Biesheuvel <ard.biesheuvel@linaro.org>; edk2-devel@lists.01.org
Cc: leif.lindholm@linaro.org; Kinney, Michael D <michael.d.kinney@intel.com>; Zeng, Star <star.zeng@intel.com>; Tian, Feng <feng.tian@intel.com>; Wu, Hao A <hao.a.wu@intel.com>
Subject: Re: [PATCH v3 1/2] MdeModulePkg: introduce SD/MMC override protocol
On 12/6/2017 2:01 AM, Ard Biesheuvel wrote:
> Many ARM based SoCs have integrated SDHCI controllers, and often,
> these implementations deviate in subtle ways from the pertinent
> specifications. On the one hand, these deviations are quite easy to
> work around, but on the other hand, having a collection of SoC
> specific workarounds in the generic driver stack is undesirable.
>
> So let's introduce an optional SD/MMC override protocol that we can
> invoke at the appropriate moments in the device initialization.
> That way, the workaround itself remains platform specific, but we can
> still use the generic driver stack on such platforms.
>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> ---
> MdeModulePkg/Include/Protocol/SdMmcOverride.h | 103 ++++++++++++++++++++
> MdeModulePkg/MdeModulePkg.dec | 3 +
> 2 files changed, 106 insertions(+)
>
> diff --git a/MdeModulePkg/Include/Protocol/SdMmcOverride.h
> b/MdeModulePkg/Include/Protocol/SdMmcOverride.h
> new file mode 100644
> index 000000000000..af57988f5625
> --- /dev/null
> +++ b/MdeModulePkg/Include/Protocol/SdMmcOverride.h
> @@ -0,0 +1,103 @@
> +/** @file
> + Protocol to describe overrides required to support non-standard
> +SDHCI
> + implementations
> +
> + Copyright (c) 2017, Linaro, Ltd. All rights reserved.<BR>
> +
> + This program and the accompanying materials are licensed and made
> + available under the terms and conditions of the BSD License which
> + accompanies this distribution. The full text of the license may be
> + found at http://opensource.org/licenses/bsd-license.php
> +
> + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> + BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
> +
> +**/
> +
> +#ifndef __SD_MMC_OVERRIDE_H__
> +#define __SD_MMC_OVERRIDE_H__
> +
> +#include <Protocol/SdMmcPassThru.h>
> +
> +#define EDKII_SD_MMC_OVERRIDE_PROTOCOL_GUID \
> + { 0xeaf9e3c1, 0xc9cd, 0x46db, { 0xa5, 0xe5, 0x5a, 0x12, 0x4c, 0x83,
> +0x23, 0x23 } }
> +
> +#define EDKII_SD_MMC_OVERRIDE_PROTOCOL_VERSION 0x1
> +
> +typedef struct _EDKII_SD_MMC_OVERRIDE EDKII_SD_MMC_OVERRIDE;
> +
> +typedef enum {
> + EdkiiSdMmcResetPre,
> + EdkiiSdMmcResetPost,
> + EdkiiSdMmcInitHostPre,
> + EdkiiSdMmcInitHostPost,
> +} EDKII_SD_MMC_PHASE_TYPE;
> +
> +/**
> +
> + Override function for SDHCI capability bits
> +
> + @param[in] PassThru A pointer to the
> + EFI_SD_MMC_PASS_THRU_PROTOCOL instance.
> + @param[in] ControllerHandle The EFI_HANDLE of the controller.
> + @param[in] Slot The 0 based slot index.
> + @param[in,out] SdMmcHcSlotCapability The SDHCI capability structure.
> +
> + @retval EFI_SUCCESS The override function completed successfully.
> + @retval EFI_NOT_FOUND The specified controller or slot does not exist.
> + @retval EFI_INVALID_PARAMETER SdMmcHcSlotCapability is NULL
> +
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI * EDKII_SD_MMC_CAPABILITY) (
> + IN EFI_SD_MMC_PASS_THRU_PROTOCOL *PassThru,
By looking a bit deeper, I get confused about this parameter.
SdMmcOverride protocol is supposed to be used by SdMmcHostController driver to produce SdMmcPassthru protocol.
But how does SdMmcOverride uses the not-yet-produced SdMmcPassthru protocol? It's like a chicken-egg problem.
> + IN EFI_HANDLE ControllerHandle,
> + IN UINT8 Slot,
> + IN OUT UINT64 *SdMmcHcSlotCapability
> + );
> +
> +/**
> +
> + Override function for SDHCI controller operations
> +
> + @param[in] PassThru A pointer to the
> + EFI_SD_MMC_PASS_THRU_PROTOCOL instance.
> + @param[in] ControllerHandle The EFI_HANDLE of the controller.
> + @param[in] Slot The 0 based slot index.
> + @param[in,out] PhaseType The type of operation and whether the
> + hook is invoked right before (pre) or
> + right after (post)
> +
> + @retval EFI_SUCCESS The override function completed successfully.
> + @retval EFI_NOT_FOUND The specified controller or slot does not exist.
> + @retval EFI_INVALID_PARAMETER HookType is invalid
> +
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI * EDKII_SD_MMC_NOTIFY_PHASE) (
> + IN EFI_SD_MMC_PASS_THRU_PROTOCOL *PassThru,
> + IN EFI_HANDLE ControllerHandle,
> + IN UINT8 Slot,
> + IN EDKII_SD_MMC_PHASE_TYPE PhaseType
> + );
> +
> +struct _EDKII_SD_MMC_OVERRIDE {
> + //
> + // Protocol version of this implementation
> + //
> + UINTN Version;
> + //
> + // Callback to override SD/MMC host controller capability bits
> + //
> + EDKII_SD_MMC_CAPABILITY Capability;
> + //
> + // Callback to invoke SD/MMC override hooks
> + //
> + EDKII_SD_MMC_NOTIFY_PHASE NotifyPhase;
> +};
> +
> +extern EFI_GUID gEdkiiSdMmcOverrideProtocolGuid;
> +
> +#endif
> diff --git a/MdeModulePkg/MdeModulePkg.dec
> b/MdeModulePkg/MdeModulePkg.dec index 856d67aceb21..64ceea029f94
> 100644
> --- a/MdeModulePkg/MdeModulePkg.dec
> +++ b/MdeModulePkg/MdeModulePkg.dec
> @@ -562,6 +562,9 @@ [Protocols]
> ## Include/Protocol/SmmMemoryAttribute.h
> gEdkiiSmmMemoryAttributeProtocolGuid = { 0x69b792ea, 0x39ce,
> 0x402d, { 0xa2, 0xa6, 0xf7, 0x21, 0xde, 0x35, 0x1d, 0xfe } }
>
> + ## Include/Protocol/SdMmcOverride.h
> + gEdkiiSdMmcOverrideProtocolGuid = { 0xeaf9e3c1, 0xc9cd, 0x46db, {
> + 0xa5, 0xe5, 0x5a, 0x12, 0x4c, 0x83, 0x23, 0x23 } }
> +
> #
> # [Error.gEfiMdeModulePkgTokenSpaceGuid]
> # 0x80000001 | Invalid value provided.
>
--
Thanks,
Ray
_______________________________________________
edk2-devel mailing list
edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel
On 12/6/2017 11:25 AM, Zeng, Star wrote:
> It should be not needed for Capability, but may be needed for NotifyPhase.
> Hao can explain more.
When the SdMmcPassthru protocol is installed by gBS->InstallProtocol(),
that's the indication of readiness of this protocol.
Before that, it's not guaranteed that every interface of SdMmcPassthru
is safe to call, e.g.: GetNextSlot or ResetDevice may not work because
the device enumeration depends on the SdMmcOverride.
Even for PassThru interface, is might be possible that some private
data needed by PassThru to work hasn't been initialized, or
future implementation might choose to defer some private data
initialization to just before protocol installation.
I think after Hao's evaluation, if PassThru is only needed and
must-use interface for some usage case, we could just pass the PassThru
function pointer to SdMmcOverride.
>
>
> Thanks,
> Star
> -----Original Message-----
> From: Ni, Ruiyu
> Sent: Wednesday, December 6, 2017 11:22 AM
> To: Ard Biesheuvel <ard.biesheuvel@linaro.org>; edk2-devel@lists.01.org
> Cc: leif.lindholm@linaro.org; Kinney, Michael D <michael.d.kinney@intel.com>; Zeng, Star <star.zeng@intel.com>; Tian, Feng <feng.tian@intel.com>; Wu, Hao A <hao.a.wu@intel.com>
> Subject: Re: [PATCH v3 1/2] MdeModulePkg: introduce SD/MMC override protocol
>
> On 12/6/2017 2:01 AM, Ard Biesheuvel wrote:
>> Many ARM based SoCs have integrated SDHCI controllers, and often,
>> these implementations deviate in subtle ways from the pertinent
>> specifications. On the one hand, these deviations are quite easy to
>> work around, but on the other hand, having a collection of SoC
>> specific workarounds in the generic driver stack is undesirable.
>>
>> So let's introduce an optional SD/MMC override protocol that we can
>> invoke at the appropriate moments in the device initialization.
>> That way, the workaround itself remains platform specific, but we can
>> still use the generic driver stack on such platforms.
>>
>> Contributed-under: TianoCore Contribution Agreement 1.1
>> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
>> ---
>> MdeModulePkg/Include/Protocol/SdMmcOverride.h | 103 ++++++++++++++++++++
>> MdeModulePkg/MdeModulePkg.dec | 3 +
>> 2 files changed, 106 insertions(+)
>>
>> diff --git a/MdeModulePkg/Include/Protocol/SdMmcOverride.h
>> b/MdeModulePkg/Include/Protocol/SdMmcOverride.h
>> new file mode 100644
>> index 000000000000..af57988f5625
>> --- /dev/null
>> +++ b/MdeModulePkg/Include/Protocol/SdMmcOverride.h
>> @@ -0,0 +1,103 @@
>> +/** @file
>> + Protocol to describe overrides required to support non-standard
>> +SDHCI
>> + implementations
>> +
>> + Copyright (c) 2017, Linaro, Ltd. All rights reserved.<BR>
>> +
>> + This program and the accompanying materials are licensed and made
>> + available under the terms and conditions of the BSD License which
>> + accompanies this distribution. The full text of the license may be
>> + found at http://opensource.org/licenses/bsd-license.php
>> +
>> + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
>> + BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
>> +
>> +**/
>> +
>> +#ifndef __SD_MMC_OVERRIDE_H__
>> +#define __SD_MMC_OVERRIDE_H__
>> +
>> +#include <Protocol/SdMmcPassThru.h>
>> +
>> +#define EDKII_SD_MMC_OVERRIDE_PROTOCOL_GUID \
>> + { 0xeaf9e3c1, 0xc9cd, 0x46db, { 0xa5, 0xe5, 0x5a, 0x12, 0x4c, 0x83,
>> +0x23, 0x23 } }
>> +
>> +#define EDKII_SD_MMC_OVERRIDE_PROTOCOL_VERSION 0x1
>> +
>> +typedef struct _EDKII_SD_MMC_OVERRIDE EDKII_SD_MMC_OVERRIDE;
>> +
>> +typedef enum {
>> + EdkiiSdMmcResetPre,
>> + EdkiiSdMmcResetPost,
>> + EdkiiSdMmcInitHostPre,
>> + EdkiiSdMmcInitHostPost,
>> +} EDKII_SD_MMC_PHASE_TYPE;
>> +
>> +/**
>> +
>> + Override function for SDHCI capability bits
>> +
>> + @param[in] PassThru A pointer to the
>> + EFI_SD_MMC_PASS_THRU_PROTOCOL instance.
>> + @param[in] ControllerHandle The EFI_HANDLE of the controller.
>> + @param[in] Slot The 0 based slot index.
>> + @param[in,out] SdMmcHcSlotCapability The SDHCI capability structure.
>> +
>> + @retval EFI_SUCCESS The override function completed successfully.
>> + @retval EFI_NOT_FOUND The specified controller or slot does not exist.
>> + @retval EFI_INVALID_PARAMETER SdMmcHcSlotCapability is NULL
>> +
>> +**/
>> +typedef
>> +EFI_STATUS
>> +(EFIAPI * EDKII_SD_MMC_CAPABILITY) (
>> + IN EFI_SD_MMC_PASS_THRU_PROTOCOL *PassThru,
> By looking a bit deeper, I get confused about this parameter.
> SdMmcOverride protocol is supposed to be used by SdMmcHostController driver to produce SdMmcPassthru protocol.
> But how does SdMmcOverride uses the not-yet-produced SdMmcPassthru protocol? It's like a chicken-egg problem.
>
>> + IN EFI_HANDLE ControllerHandle,
>> + IN UINT8 Slot,
>> + IN OUT UINT64 *SdMmcHcSlotCapability
>> + );
>> +
>> +/**
>> +
>> + Override function for SDHCI controller operations
>> +
>> + @param[in] PassThru A pointer to the
>> + EFI_SD_MMC_PASS_THRU_PROTOCOL instance.
>> + @param[in] ControllerHandle The EFI_HANDLE of the controller.
>> + @param[in] Slot The 0 based slot index.
>> + @param[in,out] PhaseType The type of operation and whether the
>> + hook is invoked right before (pre) or
>> + right after (post)
>> +
>> + @retval EFI_SUCCESS The override function completed successfully.
>> + @retval EFI_NOT_FOUND The specified controller or slot does not exist.
>> + @retval EFI_INVALID_PARAMETER HookType is invalid
>> +
>> +**/
>> +typedef
>> +EFI_STATUS
>> +(EFIAPI * EDKII_SD_MMC_NOTIFY_PHASE) (
>> + IN EFI_SD_MMC_PASS_THRU_PROTOCOL *PassThru,
>> + IN EFI_HANDLE ControllerHandle,
>> + IN UINT8 Slot,
>> + IN EDKII_SD_MMC_PHASE_TYPE PhaseType
>> + );
>> +
>> +struct _EDKII_SD_MMC_OVERRIDE {
>> + //
>> + // Protocol version of this implementation
>> + //
>> + UINTN Version;
>> + //
>> + // Callback to override SD/MMC host controller capability bits
>> + //
>> + EDKII_SD_MMC_CAPABILITY Capability;
>> + //
>> + // Callback to invoke SD/MMC override hooks
>> + //
>> + EDKII_SD_MMC_NOTIFY_PHASE NotifyPhase;
>> +};
>> +
>> +extern EFI_GUID gEdkiiSdMmcOverrideProtocolGuid;
>> +
>> +#endif
>> diff --git a/MdeModulePkg/MdeModulePkg.dec
>> b/MdeModulePkg/MdeModulePkg.dec index 856d67aceb21..64ceea029f94
>> 100644
>> --- a/MdeModulePkg/MdeModulePkg.dec
>> +++ b/MdeModulePkg/MdeModulePkg.dec
>> @@ -562,6 +562,9 @@ [Protocols]
>> ## Include/Protocol/SmmMemoryAttribute.h
>> gEdkiiSmmMemoryAttributeProtocolGuid = { 0x69b792ea, 0x39ce,
>> 0x402d, { 0xa2, 0xa6, 0xf7, 0x21, 0xde, 0x35, 0x1d, 0xfe } }
>>
>> + ## Include/Protocol/SdMmcOverride.h
>> + gEdkiiSdMmcOverrideProtocolGuid = { 0xeaf9e3c1, 0xc9cd, 0x46db, {
>> + 0xa5, 0xe5, 0x5a, 0x12, 0x4c, 0x83, 0x23, 0x23 } }
>> +
>> #
>> # [Error.gEfiMdeModulePkgTokenSpaceGuid]
>> # 0x80000001 | Invalid value provided.
>>
>
>
> --
> Thanks,
> Ray
>
--
Thanks,
Ray
_______________________________________________
edk2-devel mailing list
edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel
© 2016 - 2024 Red Hat, Inc.