From: Alexey Starikovskiy <astarikovskiy@suse.de>
To: Robert Moore <robert.moore@intel.com>, Len Brown <lenb@kernel.org>
Cc: Linux-acpi@vger.kernel.org
Subject: [PATCH] ACPICA: Handle large field appertures.
Date: Tue, 25 May 2010 14:56:28 +0400 [thread overview]
Message-ID: <20100525105628.2570.25853.stgit@thinkpad> (raw)
In-Reply-To: <4911F71203A09E4D9981D27F9D830858709F2D04@orsmsx503.amr.corp.intel.com>
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
---
source/components/executer/exfldio.c | 67 ++++++++++++++++++++++------------
source/components/executer/exprep.c | 12 +++++-
source/include/acobject.h | 3 +-
3 files changed, 54 insertions(+), 28 deletions(-)
diff --git a/source/components/executer/exfldio.c b/source/components/executer/exfldio.c
index 3276bc4..2e70763 100644
--- a/source/components/executer/exfldio.c
+++ b/source/components/executer/exfldio.c
@@ -233,9 +233,8 @@ AcpiExSetupRegion (
* (Region length is specified in bytes)
*/
if (RgnDesc->Region.Length <
- (ObjDesc->CommonField.BaseByteOffset +
- FieldDatumByteOffset +
- ObjDesc->CommonField.AccessByteWidth))
+ (ObjDesc->CommonField.BaseByteOffset + FieldDatumByteOffset +
+ ObjDesc->CommonField.AccessByteWidth))
{
if (AcpiGbl_EnableInterpreterSlack)
{
@@ -795,6 +794,7 @@ AcpiExExtractFromField (
UINT32 DatumCount;
UINT32 FieldDatumCount;
UINT32 i;
+ UINT32 AccessBitWidth;
ACPI_FUNCTION_TRACE (ExExtractFromField);
@@ -802,8 +802,7 @@ AcpiExExtractFromField (
/* Validate target buffer and clear it */
- if (BufferLength <
- ACPI_ROUND_BITS_UP_TO_BYTES (ObjDesc->CommonField.BitLength))
+ if (BufferLength < ACPI_ROUND_BITS_UP_TO_BYTES (ObjDesc->CommonField.BitLength))
{
ACPI_ERROR ((AE_INFO,
"Field size %u (bits) is too large for buffer (%u)",
@@ -813,15 +812,30 @@ AcpiExExtractFromField (
}
ACPI_MEMSET (Buffer, 0, BufferLength);
+ /* Simple case handling */
+ AccessBitWidth = ACPI_MUL_8(ObjDesc->CommonField.AccessByteWidth);
+ if (ObjDesc->CommonField.StartFieldBitOffset == 0 &&
+ ObjDesc->CommonField.BitLength == AccessBitWidth)
+ {
+ Status = AcpiExFieldDatumIo (ObjDesc, 0, Buffer, ACPI_READ);
+ return_ACPI_STATUS(Status);
+ }
+
+ /* Algo is limited to sizeof(UINT64), so cut the AccessByteWidth */
+ if (ObjDesc->CommonField.AccessByteWidth > sizeof(UINT64))
+ {
+ ObjDesc->CommonField.AccessByteWidth = sizeof(UINT64);
+ AccessBitWidth = ACPI_MUL_8(ObjDesc->CommonField.AccessByteWidth);
+ }
+
/* Compute the number of datums (access width data items) */
DatumCount = ACPI_ROUND_UP_TO (
- ObjDesc->CommonField.BitLength,
- ObjDesc->CommonField.AccessBitWidth);
+ ObjDesc->CommonField.BitLength, AccessBitWidth);
FieldDatumCount = ACPI_ROUND_UP_TO (
ObjDesc->CommonField.BitLength +
ObjDesc->CommonField.StartFieldBitOffset,
- ObjDesc->CommonField.AccessBitWidth);
+ AccessBitWidth);
/* Priming read from the field */
@@ -854,12 +868,11 @@ AcpiExExtractFromField (
* This avoids the differences in behavior between different compilers
* concerning shift values larger than the target data width.
*/
- if ((ObjDesc->CommonField.AccessBitWidth -
- ObjDesc->CommonField.StartFieldBitOffset) < ACPI_INTEGER_BIT_SIZE)
+ if (AccessBitWidth - ObjDesc->CommonField.StartFieldBitOffset <
+ ACPI_INTEGER_BIT_SIZE)
{
MergedDatum |= RawDatum <<
- (ObjDesc->CommonField.AccessBitWidth -
- ObjDesc->CommonField.StartFieldBitOffset);
+ (AccessBitWidth - ObjDesc->CommonField.StartFieldBitOffset);
}
if (i == DatumCount)
@@ -879,8 +892,7 @@ AcpiExExtractFromField (
/* Mask off any extra bits in the last datum */
- BufferTailBits = ObjDesc->CommonField.BitLength %
- ObjDesc->CommonField.AccessBitWidth;
+ BufferTailBits = ObjDesc->CommonField.BitLength % AccessBitWidth;
if (BufferTailBits)
{
MergedDatum &= ACPI_MASK_BITS_ABOVE (BufferTailBits);
@@ -928,6 +940,7 @@ AcpiExInsertIntoField (
UINT32 FieldDatumCount;
UINT32 i;
UINT32 RequiredLength;
+ UINT32 AccessBitWidth;
void *NewBuffer;
@@ -965,18 +978,26 @@ AcpiExInsertIntoField (
BufferLength = RequiredLength;
}
+ /* Algo is limited to sizeof(UINT64), so cut the AccessByteWidth */
+ if (ObjDesc->CommonField.AccessByteWidth > sizeof(UINT64))
+ {
+ ObjDesc->CommonField.AccessByteWidth = sizeof(UINT64);
+ }
+
+ AccessBitWidth = ACPI_MUL_8(ObjDesc->CommonField.AccessByteWidth);
+
/*
* Create the bitmasks used for bit insertion.
* Note: This if/else is used to bypass compiler differences with the
* shift operator
*/
- if (ObjDesc->CommonField.AccessBitWidth == ACPI_INTEGER_BIT_SIZE)
+ if (AccessBitWidth == ACPI_INTEGER_BIT_SIZE)
{
WidthMask = ACPI_UINT64_MAX;
}
else
{
- WidthMask = ACPI_MASK_BITS_ABOVE (ObjDesc->CommonField.AccessBitWidth);
+ WidthMask = ACPI_MASK_BITS_ABOVE (AccessBitWidth);
}
Mask = WidthMask &
@@ -985,11 +1006,11 @@ AcpiExInsertIntoField (
/* Compute the number of datums (access width data items) */
DatumCount = ACPI_ROUND_UP_TO (ObjDesc->CommonField.BitLength,
- ObjDesc->CommonField.AccessBitWidth);
+ AccessBitWidth);
FieldDatumCount = ACPI_ROUND_UP_TO (ObjDesc->CommonField.BitLength +
ObjDesc->CommonField.StartFieldBitOffset,
- ObjDesc->CommonField.AccessBitWidth);
+ AccessBitWidth);
/* Get initial Datum from the input buffer */
@@ -1024,12 +1045,11 @@ AcpiExInsertIntoField (
* This avoids the differences in behavior between different compilers
* concerning shift values larger than the target data width.
*/
- if ((ObjDesc->CommonField.AccessBitWidth -
- ObjDesc->CommonField.StartFieldBitOffset) < ACPI_INTEGER_BIT_SIZE)
+ if (AccessBitWidth - ObjDesc->CommonField.StartFieldBitOffset <
+ ACPI_INTEGER_BIT_SIZE)
{
MergedDatum = RawDatum >>
- (ObjDesc->CommonField.AccessBitWidth -
- ObjDesc->CommonField.StartFieldBitOffset);
+ (AccessBitWidth - ObjDesc->CommonField.StartFieldBitOffset);
}
else
{
@@ -1055,8 +1075,7 @@ AcpiExInsertIntoField (
/* Mask off any extra bits in the last datum */
BufferTailBits = (ObjDesc->CommonField.BitLength +
- ObjDesc->CommonField.StartFieldBitOffset) %
- ObjDesc->CommonField.AccessBitWidth;
+ ObjDesc->CommonField.StartFieldBitOffset) % AccessBitWidth;
if (BufferTailBits)
{
Mask &= ACPI_MASK_BITS_ABOVE (BufferTailBits);
diff --git a/source/components/executer/exprep.c b/source/components/executer/exprep.c
index 0709676..95fa502 100644
--- a/source/components/executer/exprep.c
+++ b/source/components/executer/exprep.c
@@ -455,8 +455,6 @@ AcpiExPrepCommonFieldObject (
ObjDesc->CommonField.AccessByteWidth = (UINT8)
ACPI_DIV_8 (AccessBitWidth); /* 1, 2, 4, 8 */
- ObjDesc->CommonField.AccessBitWidth = (UINT8) AccessBitWidth;
-
/*
* BaseByteOffset is the address of the start of the field within the
* region. It is the byte address of the first *datum* (field-width data
@@ -567,6 +565,16 @@ AcpiExPrepFieldValue (
ObjDesc->Field.RegionObj = AcpiNsGetAttachedObject (Info->RegionNode);
+ /* allow full data read from EC address space */
+ if (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_EC) {
+ if (ObjDesc->CommonField.BitLength > 8) {
+ ObjDesc->CommonField.AccessByteWidth =
+ ACPI_ROUND_BITS_UP_TO_BYTES(ObjDesc->CommonField.BitLength);
+ }
+ }
+
+
+
/* An additional reference for the container */
AcpiUtAddReference (ObjDesc->Field.RegionObj);
diff --git a/source/include/acobject.h b/source/include/acobject.h
index cb6e199..e9c3d0a 100644
--- a/source/include/acobject.h
+++ b/source/include/acobject.h
@@ -381,12 +381,11 @@ typedef struct acpi_object_thermal_zone
UINT8 FieldFlags; /* Access, update, and lock bits */\
UINT8 Attribute; /* From AccessAs keyword */\
UINT8 AccessByteWidth; /* Read/Write size in bytes */\
+ UINT8 StartFieldBitOffset;/* Bit offset within first field datum (0-63) */\
ACPI_NAMESPACE_NODE *Node; /* Link back to parent node */\
UINT32 BitLength; /* Length of field in bits */\
UINT32 BaseByteOffset; /* Byte offset within containing object */\
UINT32 Value; /* Value to store into the Bank or Index register */\
- UINT8 StartFieldBitOffset;/* Bit offset within first field datum (0-63) */\
- UINT8 AccessBitWidth; /* Read/Write size in bits (8-64) */
typedef struct acpi_object_field_common /* COMMON FIELD (for BUFFER, REGION, BANK, and INDEX fields) */
next parent reply other threads:[~2010-05-25 10:56 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4911F71203A09E4D9981D27F9D830858709F2D04@orsmsx503.amr.corp.intel.com>
2010-05-25 10:56 ` Alexey Starikovskiy [this message]
2010-05-25 10:59 ` [PATCH] ACPICA: Handle large field apertures Alexey Starikovskiy
2010-05-25 16:16 ` Len Brown
2010-05-26 2:39 ` Lin Ming
2010-05-26 2:49 ` Lin Ming
2010-05-26 7:30 ` Alexey Starikovskiy
2010-05-26 7:31 ` Lin Ming
2010-05-26 17:51 ` Moore, Robert
2010-05-18 20:31 [PATCH] ACPICA: Handle large field appertures Alexey Starikovskiy
2010-05-19 16:28 ` Bjorn Helgaas
2010-05-19 17:35 ` Alexey Starikovskiy
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