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Staging: hv: fix various coding style issues in RingBuffer.c

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This is a patch to the RingBuffer.c file that corrects various coding style
warnings and errors found by checkpatch.pl

[ The real solution here is to get rid of this file entirely, and use the
kernel's internal ring buffer api, but until then, make these changes so as to
make checkpatch.pl happy, and keep others from continuously sending this type
of patch. - gkh]

Signed-off-by: Craig Bartlett <c-bartlett@hotmail.co.uk>
Cc: Bill Pemberton <wfp5p@virginia.edu>
Cc: Nicolas Palix <npalix@diku.dk>
Cc: Hank Janssen <hjanssen@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
C. Bartlett 2010-02-03 15:34:27 +00:00 committed by Greg Kroah-Hartman
parent a73e6b7c50
commit 4408f5319b
1 changed files with 86 additions and 67 deletions
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153
drivers/staging/hv/RingBuffer.c
View File

@ -48,7 +48,7 @@ Description:
static inline void
GetRingBufferAvailBytes(RING_BUFFER_INFO *rbi, u32 *read, u32 *write)
{
u32 read_loc,write_loc;
u32 read_loc, write_loc;
/* Capture the read/write indices before they changed */
read_loc = rbi->RingBuffer->ReadIndex;
@ -68,7 +68,7 @@ Description:
--*/
static inline u32
GetNextWriteLocation(RING_BUFFER_INFO* RingInfo)
GetNextWriteLocation(RING_BUFFER_INFO *RingInfo)
{
u32 next = RingInfo->RingBuffer->WriteIndex;
@ -87,7 +87,7 @@ Description:
--*/
static inline void
SetNextWriteLocation(RING_BUFFER_INFO* RingInfo, u32 NextWriteLocation)
SetNextWriteLocation(RING_BUFFER_INFO *RingInfo, u32 NextWriteLocation)
{
RingInfo->RingBuffer->WriteIndex = NextWriteLocation;
}
@ -102,7 +102,7 @@ Description:
--*/
static inline u32
GetNextReadLocation(RING_BUFFER_INFO* RingInfo)
GetNextReadLocation(RING_BUFFER_INFO *RingInfo)
{
u32 next = RingInfo->RingBuffer->ReadIndex;
@ -122,7 +122,7 @@ Description:
--*/
static inline u32
GetNextReadLocationWithOffset(RING_BUFFER_INFO* RingInfo, u32 Offset)
GetNextReadLocationWithOffset(RING_BUFFER_INFO *RingInfo, u32 Offset)
{
u32 next = RingInfo->RingBuffer->ReadIndex;
@ -143,7 +143,7 @@ Description:
--*/
static inline void
SetNextReadLocation(RING_BUFFER_INFO* RingInfo, u32 NextReadLocation)
SetNextReadLocation(RING_BUFFER_INFO *RingInfo, u32 NextReadLocation)
{
RingInfo->RingBuffer->ReadIndex = NextReadLocation;
}
@ -159,7 +159,7 @@ Description:
--*/
static inline void *
GetRingBuffer(RING_BUFFER_INFO* RingInfo)
GetRingBuffer(RING_BUFFER_INFO *RingInfo)
{
return (void *)RingInfo->RingBuffer->Buffer;
}
@ -175,7 +175,7 @@ Description:
--*/
static inline u32
GetRingBufferSize(RING_BUFFER_INFO* RingInfo)
GetRingBufferSize(RING_BUFFER_INFO *RingInfo)
{
return RingInfo->RingDataSize;
}
@ -190,9 +190,10 @@ Description:
--*/
static inline u64
GetRingBufferIndices(RING_BUFFER_INFO* RingInfo)
GetRingBufferIndices(RING_BUFFER_INFO *RingInfo)
{
return ((u64)RingInfo->RingBuffer->WriteIndex << 32) || RingInfo->RingBuffer->ReadIndex;
return ((u64)RingInfo->RingBuffer->WriteIndex << 32)
|| RingInfo->RingBuffer->ReadIndex;
}
@ -210,9 +211,14 @@ void DumpRingInfo(RING_BUFFER_INFO *RingInfo, char *Prefix)
u32 bytesAvailToWrite;
u32 bytesAvailToRead;
GetRingBufferAvailBytes(RingInfo, &bytesAvailToRead, &bytesAvailToWrite);
GetRingBufferAvailBytes(RingInfo,
&bytesAvailToRead,
&bytesAvailToWrite);
DPRINT(VMBUS, DEBUG_RING_LVL, "%s <<ringinfo %p buffer %p avail write %u avail read %u read idx %u write idx %u>>",
DPRINT(VMBUS,
DEBUG_RING_LVL,
"%s <<ringinfo %p buffer %p avail write %u "
"avail read %u read idx %u write idx %u>>",
Prefix,
RingInfo,
RingInfo->RingBuffer->Buffer,
@ -229,13 +235,13 @@ static u32
CopyToRingBuffer(
RING_BUFFER_INFO *RingInfo,
u32 StartWriteOffset,
void * Src,
void *Src,
u32 SrcLen);
static u32
CopyFromRingBuffer(
RING_BUFFER_INFO *RingInfo,
void * Dest,
void *Dest,
u32 DestLen,
u32 StartReadOffset);
@ -256,15 +262,15 @@ void RingBufferGetDebugInfo(RING_BUFFER_INFO *RingInfo,
u32 bytesAvailToWrite;
u32 bytesAvailToRead;
if (RingInfo->RingBuffer)
{
GetRingBufferAvailBytes(RingInfo, &bytesAvailToRead, &bytesAvailToWrite);
if (RingInfo->RingBuffer) {
GetRingBufferAvailBytes(RingInfo,
&bytesAvailToRead,
&bytesAvailToWrite);
DebugInfo->BytesAvailToRead = bytesAvailToRead;
DebugInfo->BytesAvailToWrite = bytesAvailToWrite;
DebugInfo->CurrentReadIndex = RingInfo->RingBuffer->ReadIndex;
DebugInfo->CurrentWriteIndex = RingInfo->RingBuffer->WriteIndex;
DebugInfo->CurrentInterruptMask = RingInfo->RingBuffer->InterruptMask;
}
}
@ -299,7 +305,7 @@ int RingBufferInit(RING_BUFFER_INFO *RingInfo, void *Buffer, u32 BufferLen)
memset(RingInfo, 0, sizeof(RING_BUFFER_INFO));
RingInfo->RingBuffer = (RING_BUFFER*)Buffer;
RingInfo->RingBuffer = (RING_BUFFER *)Buffer;
RingInfo->RingBuffer->ReadIndex = RingInfo->RingBuffer->WriteIndex = 0;
RingInfo->RingSize = BufferLen;
@ -319,7 +325,7 @@ Description:
Cleanup the ring buffer
--*/
void RingBufferCleanup(RING_BUFFER_INFO* RingInfo)
void RingBufferCleanup(RING_BUFFER_INFO *RingInfo)
{
}
@ -335,14 +341,14 @@ Description:
int RingBufferWrite(RING_BUFFER_INFO *OutRingInfo,
struct scatterlist *sglist, u32 sgcount)
{
int i=0;
int i = 0;
u32 byteAvailToWrite;
u32 byteAvailToRead;
u32 totalBytesToWrite=0;
u32 totalBytesToWrite = 0;
struct scatterlist *sg;
volatile u32 nextWriteLocation;
u64 prevIndices=0;
u64 prevIndices = 0;
unsigned long flags;
DPRINT_ENTER(VMBUS);
@ -356,17 +362,23 @@ int RingBufferWrite(RING_BUFFER_INFO *OutRingInfo,
spin_lock_irqsave(&OutRingInfo->ring_lock, flags);
GetRingBufferAvailBytes(OutRingInfo, &byteAvailToRead, &byteAvailToWrite);
GetRingBufferAvailBytes(OutRingInfo,
&byteAvailToRead,
&byteAvailToWrite);
DPRINT_DBG(VMBUS, "Writing %u bytes...", totalBytesToWrite);
/* DumpRingInfo(OutRingInfo, "BEFORE "); */
/* If there is only room for the packet, assume it is full. Otherwise, the next time around, we think the ring buffer */
/* If there is only room for the packet, assume it is full. */
/* Otherwise, the next time around, we think the ring buffer */
/* is empty since the read index == write index */
if (byteAvailToWrite <= totalBytesToWrite)
{
DPRINT_DBG(VMBUS, "No more space left on outbound ring buffer (needed %u, avail %u)", totalBytesToWrite, byteAvailToWrite);
if (byteAvailToWrite <= totalBytesToWrite) {
DPRINT_DBG(VMBUS,
"No more space left on outbound ring buffer "
"(needed %u, avail %u)",
totalBytesToWrite,
byteAvailToWrite);
spin_unlock_irqrestore(&OutRingInfo->ring_lock, flags);
@ -423,17 +435,22 @@ int RingBufferPeek(RING_BUFFER_INFO *InRingInfo, void *Buffer, u32 BufferLen)
{
u32 bytesAvailToWrite;
u32 bytesAvailToRead;
u32 nextReadLocation=0;
u32 nextReadLocation = 0;
unsigned long flags;
spin_lock_irqsave(&InRingInfo->ring_lock, flags);
GetRingBufferAvailBytes(InRingInfo, &bytesAvailToRead, &bytesAvailToWrite);
GetRingBufferAvailBytes(InRingInfo,
&bytesAvailToRead,
&bytesAvailToWrite);
/* Make sure there is something to read */
if (bytesAvailToRead < BufferLen )
{
/* DPRINT_DBG(VMBUS, "got callback but not enough to read <avail to read %d read size %d>!!", bytesAvailToRead, BufferLen); */
if (bytesAvailToRead < BufferLen) {
/* DPRINT_DBG(VMBUS,
"got callback but not enough to read "
"<avail to read %d read size %d>!!",
bytesAvailToRead,
BufferLen); */
spin_unlock_irqrestore(&InRingInfo->ring_lock, flags);
@ -444,9 +461,9 @@ int RingBufferPeek(RING_BUFFER_INFO *InRingInfo, void *Buffer, u32 BufferLen)
nextReadLocation = GetNextReadLocation(InRingInfo);
nextReadLocation = CopyFromRingBuffer(InRingInfo,
Buffer,
BufferLen,
nextReadLocation);
Buffer,
BufferLen,
nextReadLocation);
spin_unlock_irqrestore(&InRingInfo->ring_lock, flags);
@ -468,24 +485,29 @@ int RingBufferRead(RING_BUFFER_INFO *InRingInfo, void *Buffer,
{
u32 bytesAvailToWrite;
u32 bytesAvailToRead;
u32 nextReadLocation=0;
u64 prevIndices=0;
u32 nextReadLocation = 0;
u64 prevIndices = 0;
unsigned long flags;
ASSERT(BufferLen > 0);
spin_lock_irqsave(&InRingInfo->ring_lock, flags);
GetRingBufferAvailBytes(InRingInfo, &bytesAvailToRead, &bytesAvailToWrite);
GetRingBufferAvailBytes(InRingInfo,
&bytesAvailToRead,
&bytesAvailToWrite);
DPRINT_DBG(VMBUS, "Reading %u bytes...", BufferLen);
/* DumpRingInfo(InRingInfo, "BEFORE "); */
/* Make sure there is something to read */
if (bytesAvailToRead < BufferLen )
{
DPRINT_DBG(VMBUS, "got callback but not enough to read <avail to read %d read size %d>!!", bytesAvailToRead, BufferLen);
if (bytesAvailToRead < BufferLen) {
DPRINT_DBG(VMBUS,
"got callback but not enough to read "
"<avail to read %d read size %d>!!",
bytesAvailToRead,
BufferLen);
spin_unlock_irqrestore(&InRingInfo->ring_lock, flags);
@ -495,17 +517,18 @@ int RingBufferRead(RING_BUFFER_INFO *InRingInfo, void *Buffer,
nextReadLocation = GetNextReadLocationWithOffset(InRingInfo, Offset);
nextReadLocation = CopyFromRingBuffer(InRingInfo,
Buffer,
BufferLen,
nextReadLocation);
Buffer,
BufferLen,
nextReadLocation);
nextReadLocation = CopyFromRingBuffer(InRingInfo,
&prevIndices,
sizeof(u64),
nextReadLocation);
&prevIndices,
sizeof(u64),
nextReadLocation);
/* Make sure all reads are done before we update the read index since */
/* the writer may start writing to the read area once the read index is updated */
/* the writer may start writing to the read area once the read index */
/*is updated */
mb();
/* Update the read index */
@ -533,25 +556,22 @@ static u32
CopyToRingBuffer(
RING_BUFFER_INFO *RingInfo,
u32 StartWriteOffset,
void * Src,
void *Src,
u32 SrcLen)
{
void * ringBuffer=GetRingBuffer(RingInfo);
u32 ringBufferSize=GetRingBufferSize(RingInfo);
void *ringBuffer = GetRingBuffer(RingInfo);
u32 ringBufferSize = GetRingBufferSize(RingInfo);
u32 fragLen;
if (SrcLen > ringBufferSize - StartWriteOffset) /* wrap-around detected! */
{
/* wrap-around detected! */
if (SrcLen > ringBufferSize - StartWriteOffset) {
DPRINT_DBG(VMBUS, "wrap-around detected!");
fragLen = ringBufferSize - StartWriteOffset;
memcpy(ringBuffer + StartWriteOffset, Src, fragLen);
memcpy(ringBuffer, Src + fragLen, SrcLen - fragLen);
}
else
{
} else
memcpy(ringBuffer + StartWriteOffset, Src, SrcLen);
}
StartWriteOffset += SrcLen;
StartWriteOffset %= ringBufferSize;
@ -573,28 +593,27 @@ Description:
static u32
CopyFromRingBuffer(
RING_BUFFER_INFO *RingInfo,
void * Dest,
void *Dest,
u32 DestLen,
u32 StartReadOffset)
{
void * ringBuffer=GetRingBuffer(RingInfo);
u32 ringBufferSize=GetRingBufferSize(RingInfo);
void *ringBuffer = GetRingBuffer(RingInfo);
u32 ringBufferSize = GetRingBufferSize(RingInfo);
u32 fragLen;
if (DestLen > ringBufferSize - StartReadOffset) /* wrap-around detected at the src */
{
/* wrap-around detected at the src */
if (DestLen > ringBufferSize - StartReadOffset) {
DPRINT_DBG(VMBUS, "src wrap-around detected!");
fragLen = ringBufferSize - StartReadOffset;
memcpy(Dest, ringBuffer + StartReadOffset, fragLen);
memcpy(Dest + fragLen, ringBuffer, DestLen - fragLen);
}
else
{
} else
memcpy(Dest, ringBuffer + StartReadOffset, DestLen);
}
StartReadOffset += DestLen;
StartReadOffset %= ringBufferSize;