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Staging: hv: Cleanup comments in ring_buffer.c
Cleanup comments in ring_buffer.c Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Abhishek Kane <v-abkane@microsoft.com> Signed-off-by: Hank Janssen <hjanssen@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
K. Y. Srinivasan
Greg Kroah-Hartman
parent
2b8a912ef2
commit
b2a5a58551
@ -18,6 +18,7 @@
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* Authors:
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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* K. Y. Srinivasan <kys@microsoft.com>
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*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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@ -35,16 +36,13 @@
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#define BYTES_AVAIL_TO_WRITE(r, w, z) ((w) >= (r)) ? ((z) - ((w) - (r))) : ((r) - (w))
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/*++
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Name:
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hv_get_ringbuffer_availbytes()
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Description:
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Get number of bytes available to read and to write to
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for the specified ring buffer
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--*/
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/*
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*
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* hv_get_ringbuffer_availbytes()
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*
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* Get number of bytes available to read and to write to
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* for the specified ring buffer
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*/
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static inline void
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hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi,
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u32 *read, u32 *write)
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@ -59,34 +57,26 @@ hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi,
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*read = rbi->ring_datasize - *write;
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}
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/*++
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Name:
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hv_get_next_write_location()
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Description:
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Get the next write location for the specified ring buffer
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--*/
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/*
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* hv_get_next_write_location()
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*
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* Get the next write location for the specified ring buffer
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*
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*/
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static inline u32
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hv_get_next_write_location(struct hv_ring_buffer_info *ring_info)
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{
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u32 next = ring_info->ring_buffer->write_index;
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/* ASSERT(next < ring_info->RingDataSize); */
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return next;
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}
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/*++
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Name:
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hv_set_next_write_location()
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Description:
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Set the next write location for the specified ring buffer
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--*/
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/*
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* hv_set_next_write_location()
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*
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* Set the next write location for the specified ring buffer
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*
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*/
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static inline void
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hv_set_next_write_location(struct hv_ring_buffer_info *ring_info,
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u32 next_write_location)
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@ -94,57 +84,44 @@ hv_set_next_write_location(struct hv_ring_buffer_info *ring_info,
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ring_info->ring_buffer->write_index = next_write_location;
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}
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/*++
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Name:
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hv_get_next_read_location()
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Description:
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Get the next read location for the specified ring buffer
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--*/
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/*
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* hv_get_next_read_location()
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*
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* Get the next read location for the specified ring buffer
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*/
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static inline u32
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hv_get_next_read_location(struct hv_ring_buffer_info *ring_info)
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{
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u32 next = ring_info->ring_buffer->read_index;
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/* ASSERT(next < ring_info->RingDataSize); */
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return next;
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}
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/*++
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Name:
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hv_get_next_readlocation_withoffset()
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Description:
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Get the next read location + offset for the specified ring buffer.
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This allows the caller to skip
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--*/
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/*
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* hv_get_next_readlocation_withoffset()
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*
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* Get the next read location + offset for the specified ring buffer.
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* This allows the caller to skip
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*/
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static inline u32
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hv_get_next_readlocation_withoffset(struct hv_ring_buffer_info *ring_info,
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u32 offset)
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{
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u32 next = ring_info->ring_buffer->read_index;
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/* ASSERT(next < ring_info->RingDataSize); */
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next += offset;
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next %= ring_info->ring_datasize;
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return next;
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}
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/*++
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Name:
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hv_set_next_read_location()
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Description:
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Set the next read location for the specified ring buffer
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--*/
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/*
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*
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* hv_set_next_read_location()
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*
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* Set the next read location for the specified ring buffer
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*
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*/
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static inline void
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hv_set_next_read_location(struct hv_ring_buffer_info *ring_info,
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u32 next_read_location)
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@ -153,15 +130,12 @@ hv_set_next_read_location(struct hv_ring_buffer_info *ring_info,
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}
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/*++
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Name:
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hv_get_ring_buffer()
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Description:
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Get the start of the ring buffer
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--*/
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/*
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*
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* hv_get_ring_buffer()
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*
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* Get the start of the ring buffer
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*/
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static inline void *
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hv_get_ring_buffer(struct hv_ring_buffer_info *ring_info)
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{
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@ -169,30 +143,25 @@ hv_get_ring_buffer(struct hv_ring_buffer_info *ring_info)
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}
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/*++
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Name:
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hv_get_ring_buffersize()
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Description:
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Get the size of the ring buffer
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--*/
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/*
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*
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* hv_get_ring_buffersize()
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*
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* Get the size of the ring buffer
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*/
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static inline u32
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hv_get_ring_buffersize(struct hv_ring_buffer_info *ring_info)
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{
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return ring_info->ring_datasize;
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}
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/*++
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Name:
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hv_get_ring_bufferindices()
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Description:
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Get the read and write indices as u64 of the specified ring buffer
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--*/
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/*
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*
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* hv_get_ring_bufferindices()
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*
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* Get the read and write indices as u64 of the specified ring buffer
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*
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*/
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static inline u64
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hv_get_ring_bufferindices(struct hv_ring_buffer_info *ring_info)
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{
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@ -200,15 +169,13 @@ hv_get_ring_bufferindices(struct hv_ring_buffer_info *ring_info)
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}
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/*++
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Name:
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hv_dump_ring_info()
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Description:
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Dump out to console the ring buffer info
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--*/
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/*
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*
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* hv_dump_ring_info()
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*
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* Dump out to console the ring buffer info
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*
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*/
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void hv_dump_ring_info(struct hv_ring_buffer_info *ring_info, char *prefix)
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{
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u32 bytes_avail_towrite;
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@ -232,7 +199,6 @@ void hv_dump_ring_info(struct hv_ring_buffer_info *ring_info, char *prefix)
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}
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/* Internal routines */
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static u32
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hv_copyto_ringbuffer(
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@ -250,15 +216,13 @@ hv_copyfrom_ringbuffer(
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/*++
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Name:
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hv_ringbuffer_get_debuginfo()
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Description:
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Get various debug metrics for the specified ring buffer
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--*/
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/*
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*
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* hv_ringbuffer_get_debuginfo()
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*
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* Get various debug metrics for the specified ring buffer
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*
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*/
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void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info,
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struct hv_ring_buffer_debug_info *debug_info)
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{
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@ -282,29 +246,25 @@ void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info,
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}
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/*++
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Name:
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hv_get_ringbuffer_interrupt_mask()
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Description:
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Get the interrupt mask for the specified ring buffer
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--*/
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/*
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*
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* hv_get_ringbuffer_interrupt_mask()
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*
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* Get the interrupt mask for the specified ring buffer
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*
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*/
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u32 hv_get_ringbuffer_interrupt_mask(struct hv_ring_buffer_info *rbi)
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{
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return rbi->ring_buffer->interrupt_mask;
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}
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/*++
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Name:
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hv_ringbuffer_init()
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Description:
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Initialize the ring buffer
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--*/
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/*
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*
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* hv_ringbuffer_init()
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*
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*Initialize the ring buffer
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*
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*/
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int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info,
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void *buffer, u32 buflen)
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{
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@ -325,28 +285,24 @@ int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info,
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return 0;
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}
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/*++
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Name:
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hv_ringbuffer_cleanup()
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Description:
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Cleanup the ring buffer
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--*/
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/*
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*
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* hv_ringbuffer_cleanup()
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*
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* Cleanup the ring buffer
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*
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*/
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void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info)
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{
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}
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/*++
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Name:
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hv_ringbuffer_write()
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Description:
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Write to the ring buffer
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--*/
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/*
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*
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* hv_ringbuffer_write()
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*
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* Write to the ring buffer
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*
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*/
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int hv_ringbuffer_write(struct hv_ring_buffer_info *outring_info,
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struct scatterlist *sglist, u32 sgcount)
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{
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@ -373,7 +329,6 @@ int hv_ringbuffer_write(struct hv_ring_buffer_info *outring_info,
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&bytes_avail_toread,
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&bytes_avail_towrite);
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/* Dumpring_info(Outring_info, "BEFORE "); */
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/* If there is only room for the packet, assume it is full. */
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/* Otherwise, the next time around, we think the ring buffer */
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@ -408,22 +363,19 @@ int hv_ringbuffer_write(struct hv_ring_buffer_info *outring_info,
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/* Now, update the write location */
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hv_set_next_write_location(outring_info, next_write_location);
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/* Dumpring_info(Outring_info, "AFTER "); */
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spin_unlock_irqrestore(&outring_info->ring_lock, flags);
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return 0;
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}
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/*++
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Name:
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hv_ringbuffer_peek()
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Description:
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Read without advancing the read index
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--*/
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/*
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*
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* hv_ringbuffer_peek()
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*
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* Read without advancing the read index
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*
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*/
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int hv_ringbuffer_peek(struct hv_ring_buffer_info *Inring_info,
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void *Buffer, u32 buflen)
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{
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@ -440,11 +392,6 @@ int hv_ringbuffer_peek(struct hv_ring_buffer_info *Inring_info,
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/* Make sure there is something to read */
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if (bytes_avail_toread < buflen) {
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/* DPRINT_DBG(VMBUS,
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"got callback but not enough to read "
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"<avail to read %d read size %d>!!",
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bytes_avail_toread,
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BufferLen); */
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spin_unlock_irqrestore(&Inring_info->ring_lock, flags);
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@ -465,15 +412,13 @@ int hv_ringbuffer_peek(struct hv_ring_buffer_info *Inring_info,
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}
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/*++
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Name:
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hv_ringbuffer_read()
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Description:
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Read and advance the read index
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--*/
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/*
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*
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* hv_ringbuffer_read()
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*
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* Read and advance the read index
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*
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*/
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int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info, void *buffer,
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u32 buflen, u32 offset)
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{
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@ -492,8 +437,6 @@ int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info, void *buffer,
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&bytes_avail_toread,
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&bytes_avail_towrite);
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/* Dumpring_info(Inring_info, "BEFORE "); */
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/* Make sure there is something to read */
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if (bytes_avail_toread < buflen) {
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spin_unlock_irqrestore(&inring_info->ring_lock, flags);
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@ -522,24 +465,20 @@ int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info, void *buffer,
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/* Update the read index */
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hv_set_next_read_location(inring_info, next_read_location);
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/* Dumpring_info(Inring_info, "AFTER "); */
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spin_unlock_irqrestore(&inring_info->ring_lock, flags);
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return 0;
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}
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/*++
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Name:
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hv_copyto_ringbuffer()
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Description:
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Helper routine to copy from source to ring buffer.
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Assume there is enough room. Handles wrap-around in dest case only!!
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--*/
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/*
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*
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* hv_copyto_ringbuffer()
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*
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* Helper routine to copy from source to ring buffer.
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* Assume there is enough room. Handles wrap-around in dest case only!!
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*
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*/
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static u32
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hv_copyto_ringbuffer(
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struct hv_ring_buffer_info *ring_info,
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@ -566,16 +505,14 @@ hv_copyto_ringbuffer(
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}
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/*++
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Name:
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hv_copyfrom_ringbuffer()
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Description:
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Helper routine to copy to source from ring buffer.
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Assume there is enough room. Handles wrap-around in src case only!!
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--*/
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/*
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*
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* hv_copyfrom_ringbuffer()
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*
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* Helper routine to copy to source from ring buffer.
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* Assume there is enough room. Handles wrap-around in src case only!!
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*
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*/
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static u32
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hv_copyfrom_ringbuffer(
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struct hv_ring_buffer_info *ring_info,
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@ -605,5 +542,3 @@ hv_copyfrom_ringbuffer(
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return start_read_offset;
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}
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/* eof */
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