From: Jeremy Linton <jeremy.lin...@arm.com>
DMA translation on the eMMC2 vary based on SoC, and
this is made worse by the poor _DMA support in Linux.
For now the "safe" option is to simply run the eMMC2
controller in PIO mode. More advanced users or !Linux
operating systems may choose to enable this to gain
a perf boost.
Signed-off-by: Jeremy Linton <jeremy.lin...@arm.com>
Reviewed-by: Pete Batard <p...@akeo.ie>
Reviewed-by: Andrei Warkentin <awarken...@vmware.com>
---
Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c | 16 +++++++++++++++-
Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf | 1 +
Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.uni | 4 ++++
Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.vfr | 17 +++++++++++++++++
Platform/RaspberryPi/Include/ConfigVars.h | 8 ++++++++
Platform/RaspberryPi/RPi3/RPi3.dsc | 1 +
Platform/RaspberryPi/RPi4/RPi4.dsc | 1 +
Platform/RaspberryPi/RaspberryPi.dec | 1 +
8 files changed, 48 insertions(+), 1 deletion(-)
diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
index 402a2996b3..22f86d4d44 100644
--- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
+++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
@@ -336,6 +336,15 @@ SetupVariables (
}
Size = sizeof (UINT32);
+ Status = gRT->GetVariable (L"MmcEnableDma",
+ &gConfigDxeFormSetGuid,
+ NULL, &Size, &Var32);
+ if (EFI_ERROR (Status)) {
+ Status = PcdSet32S (PcdMmcEnableDma, PcdGet32 (PcdMmcEnableDma));
+ ASSERT_EFI_ERROR (Status);
+ }
+
+ Size = sizeof (UINT32);
Status = gRT->GetVariable (L"DebugEnableJTAG",
&gConfigDxeFormSetGuid,
NULL, &Size, &Var32);
@@ -720,6 +729,11 @@ STATIC CONST AML_NAME_OP_REPLACE SsdtNameOpReplace[] = {
{ }
};
+STATIC CONST AML_NAME_OP_REPLACE SsdtEmmcNameOpReplace[] = {
+ { "SDMA", PcdToken (PcdMmcEnableDma) },
+ { }
+};
+
STATIC CONST NAMESPACE_TABLES SdtTables[] = {
{
SIGNATURE_64 ('R', 'P', 'I', 'T', 'H', 'F', 'A', 'N'),
@@ -731,7 +745,7 @@ STATIC CONST NAMESPACE_TABLES SdtTables[] = {
SIGNATURE_64 ('R', 'P', 'I', '4', 'E', 'M', 'M', 'C'),
0,
PcdToken(PcdSdIsArasan),
- NULL
+ SsdtEmmcNameOpReplace
},
{
SIGNATURE_64 ('R', 'P', 'I', 0, 0, 0, 0, 0),
diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf
b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf
index 544e3b3e10..d51e54e010 100644
--- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf
+++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf
@@ -84,6 +84,7 @@
gRaspberryPiTokenSpaceGuid.PcdMmcSdDefaultSpeedMHz
gRaspberryPiTokenSpaceGuid.PcdMmcSdHighSpeedMHz
gRaspberryPiTokenSpaceGuid.PcdMmcDisableMulti
+ gRaspberryPiTokenSpaceGuid.PcdMmcEnableDma
gRaspberryPiTokenSpaceGuid.PcdDebugEnableJTAG
gRaspberryPiTokenSpaceGuid.PcdDisplayEnableScaledVModes
gRaspberryPiTokenSpaceGuid.PcdDisplayEnableSShot
diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.uni
b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.uni
index 2afe8f32ae..466fa852cb 100644
--- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.uni
+++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.uni
@@ -94,6 +94,10 @@
#string STR_MMC_SD_HS_PROMPT #language en-US "SD High Speed (MHz)"
#string STR_MMC_SD_HS_HELP #language en-US "Override default 50Mhz"
+#string STR_MMC_EMMC_PROMPT #language en-US "Enable eMMC DMA modes"
+#string STR_MMC_EMMC_PIO #language en-US "PIO"
+#string STR_MMC_EMMC_DMA #language en-US "SDMA/ADMA2"
+#string STR_MMC_EMMC_HELP #language en-US "Enable eMMC DMA modes for
OSes that support ACPI _DMA() translations"
/*
* Display settings.
diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.vfr
b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.vfr
index de5e43471a..cc7a09cfb7 100644
--- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.vfr
+++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.vfr
@@ -96,6 +96,11 @@ formset
name = MmcSdHighSpeedMHz,
guid = CONFIGDXE_FORM_SET_GUID;
+ efivarstore MMC_EMMC_DMA_VARSTORE_DATA,
+ attribute = EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
+ name = MmcEnableDma,
+ guid = CONFIGDXE_FORM_SET_GUID;
+
efivarstore DEBUG_ENABLE_JTAG_VARSTORE_DATA,
attribute = EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
name = DebugEnableJTAG,
@@ -275,6 +280,18 @@ formset
maximum = 100,
default = 50,
endnumeric;
+#if (RPI_MODEL == 4)
+ grayoutif ideqval SdIsArasan.Routing == 1;
+ oneof varid = MmcEnableDma.EnableDma,
+ prompt = STRING_TOKEN(STR_MMC_EMMC_PROMPT),
+ help = STRING_TOKEN(STR_MMC_EMMC_HELP),
+ flags = NUMERIC_SIZE_4 | INTERACTIVE | RESET_REQUIRED,
+ option text = STRING_TOKEN(STR_MMC_EMMC_PIO), value = 0, flags =
DEFAULT;
+ option text = STRING_TOKEN(STR_MMC_EMMC_DMA), value = 1, flags = 0;
+ endoneof;
+ endif;
+#endif
+
endform;
form formid = 0x1004,
diff --git a/Platform/RaspberryPi/Include/ConfigVars.h
b/Platform/RaspberryPi/Include/ConfigVars.h
index c185bfe28b..142317985a 100644
--- a/Platform/RaspberryPi/Include/ConfigVars.h
+++ b/Platform/RaspberryPi/Include/ConfigVars.h
@@ -135,4 +135,12 @@ typedef struct {
UINT32 MHz;
} MMC_SD_HS_MHZ_VARSTORE_DATA;
+typedef struct {
+ /*
+ * 0 - eMMC PIO mode
+ * 1 - eMMC DMA mode
+ */
+ UINT32 EnableDma;
+} MMC_EMMC_DMA_VARSTORE_DATA;
+
#endif /* CONFIG_VARS_H */
diff --git a/Platform/RaspberryPi/RPi3/RPi3.dsc
b/Platform/RaspberryPi/RPi3/RPi3.dsc
index 530b42796a..107cbda297 100644
--- a/Platform/RaspberryPi/RPi3/RPi3.dsc
+++ b/Platform/RaspberryPi/RPi3/RPi3.dsc
@@ -470,6 +470,7 @@
gRaspberryPiTokenSpaceGuid.PcdMmcSdDefaultSpeedMHz|L"MmcSdDefaultSpeedMHz"|gConfigDxeFormSetGuid|0x0|25
gRaspberryPiTokenSpaceGuid.PcdMmcSdHighSpeedMHz|L"MmcSdHighSpeedMHz"|gConfigDxeFormSetGuid|0x0|50
gRaspberryPiTokenSpaceGuid.PcdMmcDisableMulti|L"MmcDisableMulti"|gConfigDxeFormSetGuid|0x0|0
+
gRaspberryPiTokenSpaceGuid.PcdMmcEnableDma|L"MmcEnableDma"|gConfigDxeFormSetGuid|0x0|0
#
# Debug-related.
diff --git a/Platform/RaspberryPi/RPi4/RPi4.dsc
b/Platform/RaspberryPi/RPi4/RPi4.dsc
index 5f8452aa0b..9962df0076 100644
--- a/Platform/RaspberryPi/RPi4/RPi4.dsc
+++ b/Platform/RaspberryPi/RPi4/RPi4.dsc
@@ -481,6 +481,7 @@
gRaspberryPiTokenSpaceGuid.PcdMmcSdDefaultSpeedMHz|L"MmcSdDefaultSpeedMHz"|gConfigDxeFormSetGuid|0x0|25
gRaspberryPiTokenSpaceGuid.PcdMmcSdHighSpeedMHz|L"MmcSdHighSpeedMHz"|gConfigDxeFormSetGuid|0x0|50
gRaspberryPiTokenSpaceGuid.PcdMmcDisableMulti|L"MmcDisableMulti"|gConfigDxeFormSetGuid|0x0|0
+
gRaspberryPiTokenSpaceGuid.PcdMmcEnableDma|L"MmcEnableDma"|gConfigDxeFormSetGuid|0x0|0
#
# Debug-related.
diff --git a/Platform/RaspberryPi/RaspberryPi.dec
b/Platform/RaspberryPi/RaspberryPi.dec
index 10723036aa..08135717ed 100644
--- a/Platform/RaspberryPi/RaspberryPi.dec
+++ b/Platform/RaspberryPi/RaspberryPi.dec
@@ -69,3 +69,4 @@
gRaspberryPiTokenSpaceGuid.PcdFanOnGpio|0|UINT32|0x0000001C
gRaspberryPiTokenSpaceGuid.PcdFanTemp|0|UINT32|0x0000001D
gRaspberryPiTokenSpaceGuid.PcdPlatformResetDelay|0|UINT32|0x0000001E
+ gRaspberryPiTokenSpaceGuid.PcdMmcEnableDma|0|UINT32|0x0000001F
--
2.13.7
-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#71742): https://edk2.groups.io/g/devel/message/71742
Mute This Topic: https://groups.io/mt/80703638/21656
Group Owner: devel+ow...@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com]
-=-=-=-=-=-=-=-=-=-=-=-
