/*++
Name:
- GetRingBufferAvailBytes()
+ get_ringbuffer_availbytes()
Description:
Get number of bytes available to read and to write to
--*/
static inline void
-GetRingBufferAvailBytes(struct hv_ring_buffer_info *rbi, u32 *read, u32 *write)
+get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi,
+ u32 *read, u32 *write)
{
u32 read_loc, write_loc;
/* Capture the read/write indices before they changed */
- read_loc = rbi->RingBuffer->ReadIndex;
- write_loc = rbi->RingBuffer->WriteIndex;
+ read_loc = rbi->ring_buffer->read_index;
+ write_loc = rbi->ring_buffer->write_index;
- *write = BYTES_AVAIL_TO_WRITE(read_loc, write_loc, rbi->RingDataSize);
- *read = rbi->RingDataSize - *write;
+ *write = BYTES_AVAIL_TO_WRITE(read_loc, write_loc, rbi->ring_datasize);
+ *read = rbi->ring_datasize - *write;
}
/*++
Name:
- GetNextWriteLocation()
+ get_next_write_location()
Description:
Get the next write location for the specified ring buffer
--*/
static inline u32
-GetNextWriteLocation(struct hv_ring_buffer_info *RingInfo)
+get_next_write_location(struct hv_ring_buffer_info *ring_info)
{
- u32 next = RingInfo->RingBuffer->WriteIndex;
+ u32 next = ring_info->ring_buffer->write_index;
- /* ASSERT(next < RingInfo->RingDataSize); */
+ /* ASSERT(next < ring_info->RingDataSize); */
return next;
}
/*++
Name:
- SetNextWriteLocation()
+ set_next_write_location()
Description:
Set the next write location for the specified ring buffer
--*/
static inline void
-SetNextWriteLocation(struct hv_ring_buffer_info *RingInfo,
- u32 NextWriteLocation)
+set_next_write_location(struct hv_ring_buffer_info *ring_info,
+ u32 next_write_location)
{
- RingInfo->RingBuffer->WriteIndex = NextWriteLocation;
+ ring_info->ring_buffer->write_index = next_write_location;
}
/*++
Name:
- GetNextReadLocation()
+ get_next_read_location()
Description:
Get the next read location for the specified ring buffer
--*/
static inline u32
-GetNextReadLocation(struct hv_ring_buffer_info *RingInfo)
+get_next_read_location(struct hv_ring_buffer_info *ring_info)
{
- u32 next = RingInfo->RingBuffer->ReadIndex;
+ u32 next = ring_info->ring_buffer->read_index;
- /* ASSERT(next < RingInfo->RingDataSize); */
+ /* ASSERT(next < ring_info->RingDataSize); */
return next;
}
/*++
Name:
- GetNextReadLocationWithOffset()
+ get_next_readlocation_withoffset()
Description:
Get the next read location + offset for the specified ring buffer.
--*/
static inline u32
-GetNextReadLocationWithOffset(struct hv_ring_buffer_info *RingInfo, u32 Offset)
+get_next_readlocation_withoffset(struct hv_ring_buffer_info *ring_info,
+ u32 offset)
{
- u32 next = RingInfo->RingBuffer->ReadIndex;
+ u32 next = ring_info->ring_buffer->read_index;
- /* ASSERT(next < RingInfo->RingDataSize); */
- next += Offset;
- next %= RingInfo->RingDataSize;
+ /* ASSERT(next < ring_info->RingDataSize); */
+ next += offset;
+ next %= ring_info->ring_datasize;
return next;
}
/*++
Name:
- SetNextReadLocation()
+ set_next_read_location()
Description:
Set the next read location for the specified ring buffer
--*/
static inline void
-SetNextReadLocation(struct hv_ring_buffer_info *RingInfo, u32 NextReadLocation)
+set_next_read_location(struct hv_ring_buffer_info *ring_info,
+ u32 next_read_location)
{
- RingInfo->RingBuffer->ReadIndex = NextReadLocation;
+ ring_info->ring_buffer->read_index = next_read_location;
}
/*++
Name:
- GetRingBuffer()
+ get_ring_buffer()
Description:
Get the start of the ring buffer
--*/
static inline void *
-GetRingBuffer(struct hv_ring_buffer_info *RingInfo)
+get_ring_buffer(struct hv_ring_buffer_info *ring_info)
{
- return (void *)RingInfo->RingBuffer->Buffer;
+ return (void *)ring_info->ring_buffer->buffer;
}
/*++
Name:
- GetRingBufferSize()
+ get_ring_buffersize()
Description:
Get the size of the ring buffer
--*/
static inline u32
-GetRingBufferSize(struct hv_ring_buffer_info *RingInfo)
+get_ring_buffersize(struct hv_ring_buffer_info *ring_info)
{
- return RingInfo->RingDataSize;
+ return ring_info->ring_datasize;
}
/*++
Name:
- GetRingBufferIndices()
+ get_ring_bufferindices()
Description:
Get the read and write indices as u64 of the specified ring buffer
--*/
static inline u64
-GetRingBufferIndices(struct hv_ring_buffer_info *RingInfo)
+get_ring_bufferindices(struct hv_ring_buffer_info *ring_info)
{
- return (u64)RingInfo->RingBuffer->WriteIndex << 32;
+ return (u64)ring_info->ring_buffer->write_index << 32;
}
/*++
Name:
- DumpRingInfo()
+ dump_ring_info()
Description:
Dump out to console the ring buffer info
--*/
-void DumpRingInfo(struct hv_ring_buffer_info *RingInfo, char *Prefix)
+void dump_ring_info(struct hv_ring_buffer_info *ring_info, char *prefix)
{
- u32 bytesAvailToWrite;
- u32 bytesAvailToRead;
+ u32 bytes_avail_towrite;
+ u32 bytes_avail_toread;
- GetRingBufferAvailBytes(RingInfo,
- &bytesAvailToRead,
- &bytesAvailToWrite);
+ get_ringbuffer_availbytes(ring_info,
+ &bytes_avail_toread,
+ &bytes_avail_towrite);
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,
- bytesAvailToWrite,
- bytesAvailToRead,
- RingInfo->RingBuffer->ReadIndex,
- RingInfo->RingBuffer->WriteIndex);
+ prefix,
+ ring_info,
+ ring_info->ring_buffer->buffer,
+ bytes_avail_towrite,
+ bytes_avail_toread,
+ ring_info->ring_buffer->read_index,
+ ring_info->ring_buffer->write_index);
}
/* Internal routines */
static u32
-CopyToRingBuffer(
- struct hv_ring_buffer_info *RingInfo,
- u32 StartWriteOffset,
- void *Src,
- u32 SrcLen);
+copyto_ringbuffer(
+ struct hv_ring_buffer_info *ring_info,
+ u32 start_write_offset,
+ void *src,
+ u32 srclen);
static u32
-CopyFromRingBuffer(
- struct hv_ring_buffer_info *RingInfo,
- void *Dest,
- u32 DestLen,
- u32 StartReadOffset);
+copyfrom_ringbuffer(
+ struct hv_ring_buffer_info *ring_info,
+ void *dest,
+ u32 destlen,
+ u32 start_read_offset);
/*++
Name:
- RingBufferGetDebugInfo()
+ ringbuffer_get_debuginfo()
Description:
Get various debug metrics for the specified ring buffer
--*/
-void RingBufferGetDebugInfo(struct hv_ring_buffer_info *RingInfo,
+void ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info,
struct hv_ring_buffer_debug_info *debug_info)
{
- u32 bytesAvailToWrite;
- u32 bytesAvailToRead;
-
- if (RingInfo->RingBuffer) {
- GetRingBufferAvailBytes(RingInfo,
- &bytesAvailToRead,
- &bytesAvailToWrite);
-
- debug_info->BytesAvailToRead = bytesAvailToRead;
- debug_info->BytesAvailToWrite = bytesAvailToWrite;
- debug_info->CurrentReadIndex = RingInfo->RingBuffer->ReadIndex;
- debug_info->CurrentWriteIndex = RingInfo->RingBuffer->WriteIndex;
- debug_info->CurrentInterruptMask = RingInfo->RingBuffer->InterruptMask;
+ u32 bytes_avail_towrite;
+ u32 bytes_avail_toread;
+
+ if (ring_info->ring_buffer) {
+ get_ringbuffer_availbytes(ring_info,
+ &bytes_avail_toread,
+ &bytes_avail_towrite);
+
+ debug_info->bytes_avail_toread = bytes_avail_toread;
+ debug_info->bytes_avail_towrite = bytes_avail_towrite;
+ debug_info->current_read_index =
+ ring_info->ring_buffer->read_index;
+ debug_info->current_write_index =
+ ring_info->ring_buffer->write_index;
+ debug_info->current_interrupt_mask =
+ ring_info->ring_buffer->interrupt_mask;
}
}
/*++
Name:
- GetRingBufferInterruptMask()
+ get_ringbuffer_interrupt_mask()
Description:
Get the interrupt mask for the specified ring buffer
--*/
-u32 GetRingBufferInterruptMask(struct hv_ring_buffer_info *rbi)
+u32 get_ringbuffer_interrupt_mask(struct hv_ring_buffer_info *rbi)
{
- return rbi->RingBuffer->InterruptMask;
+ return rbi->ring_buffer->interrupt_mask;
}
/*++
Name:
- RingBufferInit()
+ ringbuffer_init()
Description:
Initialize the ring buffer
--*/
-int RingBufferInit(struct hv_ring_buffer_info *RingInfo, void *Buffer, u32 BufferLen)
+int ringbuffer_init(struct hv_ring_buffer_info *ring_info,
+ void *buffer, u32 buflen)
{
if (sizeof(struct hv_ring_buffer) != PAGE_SIZE)
return -EINVAL;
- memset(RingInfo, 0, sizeof(struct hv_ring_buffer_info));
+ memset(ring_info, 0, sizeof(struct hv_ring_buffer_info));
- RingInfo->RingBuffer = (struct hv_ring_buffer *)Buffer;
- RingInfo->RingBuffer->ReadIndex = RingInfo->RingBuffer->WriteIndex = 0;
+ ring_info->ring_buffer = (struct hv_ring_buffer *)buffer;
+ ring_info->ring_buffer->read_index =
+ ring_info->ring_buffer->write_index = 0;
- RingInfo->RingSize = BufferLen;
- RingInfo->RingDataSize = BufferLen - sizeof(struct hv_ring_buffer);
+ ring_info->ring_size = buflen;
+ ring_info->ring_datasize = buflen - sizeof(struct hv_ring_buffer);
- spin_lock_init(&RingInfo->ring_lock);
+ spin_lock_init(&ring_info->ring_lock);
return 0;
}
/*++
Name:
- RingBufferCleanup()
+ ringbuffer_cleanup()
Description:
Cleanup the ring buffer
--*/
-void RingBufferCleanup(struct hv_ring_buffer_info *RingInfo)
+void ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info)
{
}
/*++
Name:
- RingBufferWrite()
+ ringbuffer_write()
Description:
Write to the ring buffer
--*/
-int RingBufferWrite(struct hv_ring_buffer_info *OutRingInfo,
+int ringbuffer_write(struct hv_ring_buffer_info *outring_info,
struct scatterlist *sglist, u32 sgcount)
{
int i = 0;
- u32 byteAvailToWrite;
- u32 byteAvailToRead;
- u32 totalBytesToWrite = 0;
+ u32 bytes_avail_towrite;
+ u32 bytes_avail_toread;
+ u32 totalbytes_towrite = 0;
struct scatterlist *sg;
- volatile u32 nextWriteLocation;
- u64 prevIndices = 0;
+ volatile u32 next_write_location;
+ u64 prev_indices = 0;
unsigned long flags;
for_each_sg(sglist, sg, sgcount, i)
{
- totalBytesToWrite += sg->length;
+ totalbytes_towrite += sg->length;
}
- totalBytesToWrite += sizeof(u64);
+ totalbytes_towrite += sizeof(u64);
- spin_lock_irqsave(&OutRingInfo->ring_lock, flags);
+ spin_lock_irqsave(&outring_info->ring_lock, flags);
- GetRingBufferAvailBytes(OutRingInfo,
- &byteAvailToRead,
- &byteAvailToWrite);
+ get_ringbuffer_availbytes(outring_info,
+ &bytes_avail_toread,
+ &bytes_avail_towrite);
- DPRINT_DBG(VMBUS, "Writing %u bytes...", totalBytesToWrite);
+ DPRINT_DBG(VMBUS, "Writing %u bytes...", totalbytes_towrite);
- /* DumpRingInfo(OutRingInfo, "BEFORE "); */
+ /* Dumpring_info(Outring_info, "BEFORE "); */
/* 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) {
+ if (bytes_avail_towrite <= totalbytes_towrite) {
DPRINT_DBG(VMBUS,
"No more space left on outbound ring buffer "
"(needed %u, avail %u)",
- totalBytesToWrite,
- byteAvailToWrite);
+ totalbytes_towrite,
+ bytes_avail_towrite);
- spin_unlock_irqrestore(&OutRingInfo->ring_lock, flags);
+ spin_unlock_irqrestore(&outring_info->ring_lock, flags);
return -1;
}
/* Write to the ring buffer */
- nextWriteLocation = GetNextWriteLocation(OutRingInfo);
+ next_write_location = get_next_write_location(outring_info);
for_each_sg(sglist, sg, sgcount, i)
{
- nextWriteLocation = CopyToRingBuffer(OutRingInfo,
- nextWriteLocation,
+ next_write_location = copyto_ringbuffer(outring_info,
+ next_write_location,
sg_virt(sg),
sg->length);
}
/* Set previous packet start */
- prevIndices = GetRingBufferIndices(OutRingInfo);
+ prev_indices = get_ring_bufferindices(outring_info);
- nextWriteLocation = CopyToRingBuffer(OutRingInfo,
- nextWriteLocation,
- &prevIndices,
+ next_write_location = copyto_ringbuffer(outring_info,
+ next_write_location,
+ &prev_indices,
sizeof(u64));
/* Make sure we flush all writes before updating the writeIndex */
mb();
/* Now, update the write location */
- SetNextWriteLocation(OutRingInfo, nextWriteLocation);
+ set_next_write_location(outring_info, next_write_location);
- /* DumpRingInfo(OutRingInfo, "AFTER "); */
+ /* Dumpring_info(Outring_info, "AFTER "); */
- spin_unlock_irqrestore(&OutRingInfo->ring_lock, flags);
+ spin_unlock_irqrestore(&outring_info->ring_lock, flags);
return 0;
}
/*++
Name:
- RingBufferPeek()
+ ringbuffer_peek()
Description:
Read without advancing the read index
--*/
-int RingBufferPeek(struct hv_ring_buffer_info *InRingInfo, void *Buffer, u32 BufferLen)
+int ringbuffer_peek(struct hv_ring_buffer_info *Inring_info,
+ void *Buffer, u32 buflen)
{
- u32 bytesAvailToWrite;
- u32 bytesAvailToRead;
- u32 nextReadLocation = 0;
+ u32 bytes_avail_towrite;
+ u32 bytes_avail_toread;
+ u32 next_read_location = 0;
unsigned long flags;
- spin_lock_irqsave(&InRingInfo->ring_lock, flags);
+ spin_lock_irqsave(&Inring_info->ring_lock, flags);
- GetRingBufferAvailBytes(InRingInfo,
- &bytesAvailToRead,
- &bytesAvailToWrite);
+ get_ringbuffer_availbytes(Inring_info,
+ &bytes_avail_toread,
+ &bytes_avail_towrite);
/* Make sure there is something to read */
- if (bytesAvailToRead < BufferLen) {
+ if (bytes_avail_toread < buflen) {
/* DPRINT_DBG(VMBUS,
"got callback but not enough to read "
"<avail to read %d read size %d>!!",
- bytesAvailToRead,
+ bytes_avail_toread,
BufferLen); */
- spin_unlock_irqrestore(&InRingInfo->ring_lock, flags);
+ spin_unlock_irqrestore(&Inring_info->ring_lock, flags);
return -1;
}
/* Convert to byte offset */
- nextReadLocation = GetNextReadLocation(InRingInfo);
+ next_read_location = get_next_read_location(Inring_info);
- nextReadLocation = CopyFromRingBuffer(InRingInfo,
+ next_read_location = copyfrom_ringbuffer(Inring_info,
Buffer,
- BufferLen,
- nextReadLocation);
+ buflen,
+ next_read_location);
- spin_unlock_irqrestore(&InRingInfo->ring_lock, flags);
+ spin_unlock_irqrestore(&Inring_info->ring_lock, flags);
return 0;
}
/*++
Name:
- RingBufferRead()
+ ringbuffer_read()
Description:
Read and advance the read index
--*/
-int RingBufferRead(struct hv_ring_buffer_info *InRingInfo, void *Buffer,
- u32 BufferLen, u32 Offset)
+int ringbuffer_read(struct hv_ring_buffer_info *inring_info, void *buffer,
+ u32 buflen, u32 offset)
{
- u32 bytesAvailToWrite;
- u32 bytesAvailToRead;
- u32 nextReadLocation = 0;
- u64 prevIndices = 0;
+ u32 bytes_avail_towrite;
+ u32 bytes_avail_toread;
+ u32 next_read_location = 0;
+ u64 prev_indices = 0;
unsigned long flags;
- if (BufferLen <= 0)
+ if (buflen <= 0)
return -EINVAL;
- spin_lock_irqsave(&InRingInfo->ring_lock, flags);
+ spin_lock_irqsave(&inring_info->ring_lock, flags);
- GetRingBufferAvailBytes(InRingInfo,
- &bytesAvailToRead,
- &bytesAvailToWrite);
+ get_ringbuffer_availbytes(inring_info,
+ &bytes_avail_toread,
+ &bytes_avail_towrite);
- DPRINT_DBG(VMBUS, "Reading %u bytes...", BufferLen);
+ DPRINT_DBG(VMBUS, "Reading %u bytes...", buflen);
- /* DumpRingInfo(InRingInfo, "BEFORE "); */
+ /* Dumpring_info(Inring_info, "BEFORE "); */
/* Make sure there is something to read */
- if (bytesAvailToRead < BufferLen) {
+ if (bytes_avail_toread < buflen) {
DPRINT_DBG(VMBUS,
"got callback but not enough to read "
"<avail to read %d read size %d>!!",
- bytesAvailToRead,
- BufferLen);
+ bytes_avail_toread,
+ buflen);
- spin_unlock_irqrestore(&InRingInfo->ring_lock, flags);
+ spin_unlock_irqrestore(&inring_info->ring_lock, flags);
return -1;
}
- nextReadLocation = GetNextReadLocationWithOffset(InRingInfo, Offset);
+ next_read_location =
+ get_next_readlocation_withoffset(inring_info, offset);
- nextReadLocation = CopyFromRingBuffer(InRingInfo,
- Buffer,
- BufferLen,
- nextReadLocation);
+ next_read_location = copyfrom_ringbuffer(inring_info,
+ buffer,
+ buflen,
+ next_read_location);
- nextReadLocation = CopyFromRingBuffer(InRingInfo,
- &prevIndices,
+ next_read_location = copyfrom_ringbuffer(inring_info,
+ &prev_indices,
sizeof(u64),
- nextReadLocation);
+ next_read_location);
/* 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 */
mb();
/* Update the read index */
- SetNextReadLocation(InRingInfo, nextReadLocation);
+ set_next_read_location(inring_info, next_read_location);
- /* DumpRingInfo(InRingInfo, "AFTER "); */
+ /* Dumpring_info(Inring_info, "AFTER "); */
- spin_unlock_irqrestore(&InRingInfo->ring_lock, flags);
+ spin_unlock_irqrestore(&inring_info->ring_lock, flags);
return 0;
}
/*++
Name:
- CopyToRingBuffer()
+ copyto_ringbuffer()
Description:
Helper routine to copy from source to ring buffer.
--*/
static u32
-CopyToRingBuffer(
- struct hv_ring_buffer_info *RingInfo,
- u32 StartWriteOffset,
- void *Src,
- u32 SrcLen)
+copyto_ringbuffer(
+ struct hv_ring_buffer_info *ring_info,
+ u32 start_write_offset,
+ void *src,
+ u32 srclen)
{
- void *ringBuffer = GetRingBuffer(RingInfo);
- u32 ringBufferSize = GetRingBufferSize(RingInfo);
- u32 fragLen;
+ void *ring_buffer = get_ring_buffer(ring_info);
+ u32 ring_buffer_size = get_ring_buffersize(ring_info);
+ u32 frag_len;
/* wrap-around detected! */
- if (SrcLen > ringBufferSize - StartWriteOffset) {
+ if (srclen > ring_buffer_size - start_write_offset) {
DPRINT_DBG(VMBUS, "wrap-around detected!");
- fragLen = ringBufferSize - StartWriteOffset;
- memcpy(ringBuffer + StartWriteOffset, Src, fragLen);
- memcpy(ringBuffer, Src + fragLen, SrcLen - fragLen);
+ frag_len = ring_buffer_size - start_write_offset;
+ memcpy(ring_buffer + start_write_offset, src, frag_len);
+ memcpy(ring_buffer, src + frag_len, srclen - frag_len);
} else
- memcpy(ringBuffer + StartWriteOffset, Src, SrcLen);
+ memcpy(ring_buffer + start_write_offset, src, srclen);
- StartWriteOffset += SrcLen;
- StartWriteOffset %= ringBufferSize;
+ start_write_offset += srclen;
+ start_write_offset %= ring_buffer_size;
- return StartWriteOffset;
+ return start_write_offset;
}
/*++
Name:
- CopyFromRingBuffer()
+ copyfrom_ringbuffer()
Description:
Helper routine to copy to source from ring buffer.
--*/
static u32
-CopyFromRingBuffer(
- struct hv_ring_buffer_info *RingInfo,
- void *Dest,
- u32 DestLen,
- u32 StartReadOffset)
+copyfrom_ringbuffer(
+ struct hv_ring_buffer_info *ring_info,
+ void *dest,
+ u32 destlen,
+ u32 start_read_offset)
{
- void *ringBuffer = GetRingBuffer(RingInfo);
- u32 ringBufferSize = GetRingBufferSize(RingInfo);
+ void *ring_buffer = get_ring_buffer(ring_info);
+ u32 ring_buffer_size = get_ring_buffersize(ring_info);
- u32 fragLen;
+ u32 frag_len;
/* wrap-around detected at the src */
- if (DestLen > ringBufferSize - StartReadOffset) {
+ if (destlen > ring_buffer_size - start_read_offset) {
DPRINT_DBG(VMBUS, "src wrap-around detected!");
- fragLen = ringBufferSize - StartReadOffset;
+ frag_len = ring_buffer_size - start_read_offset;
- memcpy(Dest, ringBuffer + StartReadOffset, fragLen);
- memcpy(Dest + fragLen, ringBuffer, DestLen - fragLen);
+ memcpy(dest, ring_buffer + start_read_offset, frag_len);
+ memcpy(dest + frag_len, ring_buffer, destlen - frag_len);
} else
- memcpy(Dest, ringBuffer + StartReadOffset, DestLen);
+ memcpy(dest, ring_buffer + start_read_offset, destlen);
- StartReadOffset += DestLen;
- StartReadOffset %= ringBufferSize;
+ start_read_offset += destlen;
+ start_read_offset %= ring_buffer_size;
- return StartReadOffset;
+ return start_read_offset;
}
projects / mv-sheeva.git / blobdiff