diff --git a/drivers/staging/hv/ring_buffer.c b/drivers/staging/hv/ring_buffer.c index f4707f8acb03..8544516a7127 100644 --- a/drivers/staging/hv/ring_buffer.c +++ b/drivers/staging/hv/ring_buffer.c @@ -18,6 +18,7 @@ * Authors: * Haiyang Zhang * Hank Janssen + * K. Y. Srinivasan * */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt @@ -35,16 +36,13 @@ #define BYTES_AVAIL_TO_WRITE(r, w, z) ((w) >= (r)) ? ((z) - ((w) - (r))) : ((r) - (w)) -/*++ - -Name: - hv_get_ringbuffer_availbytes() - -Description: - Get number of bytes available to read and to write to - for the specified ring buffer - ---*/ +/* + * + * hv_get_ringbuffer_availbytes() + * + * Get number of bytes available to read and to write to + * for the specified ring buffer + */ static inline void hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi, u32 *read, u32 *write) @@ -59,34 +57,26 @@ hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi, *read = rbi->ring_datasize - *write; } -/*++ - -Name: - hv_get_next_write_location() - -Description: - Get the next write location for the specified ring buffer - ---*/ +/* + * hv_get_next_write_location() + * + * Get the next write location for the specified ring buffer + * + */ static inline u32 hv_get_next_write_location(struct hv_ring_buffer_info *ring_info) { u32 next = ring_info->ring_buffer->write_index; - /* ASSERT(next < ring_info->RingDataSize); */ - return next; } -/*++ - -Name: - hv_set_next_write_location() - -Description: - Set the next write location for the specified ring buffer - ---*/ +/* + * hv_set_next_write_location() + * + * Set the next write location for the specified ring buffer + * + */ static inline void hv_set_next_write_location(struct hv_ring_buffer_info *ring_info, u32 next_write_location) @@ -94,57 +84,44 @@ hv_set_next_write_location(struct hv_ring_buffer_info *ring_info, ring_info->ring_buffer->write_index = next_write_location; } -/*++ - -Name: - hv_get_next_read_location() - -Description: - Get the next read location for the specified ring buffer - ---*/ +/* + * hv_get_next_read_location() + * + * Get the next read location for the specified ring buffer + */ static inline u32 hv_get_next_read_location(struct hv_ring_buffer_info *ring_info) { u32 next = ring_info->ring_buffer->read_index; - /* ASSERT(next < ring_info->RingDataSize); */ - return next; } -/*++ - -Name: - hv_get_next_readlocation_withoffset() - -Description: - Get the next read location + offset for the specified ring buffer. - This allows the caller to skip - ---*/ +/* + * hv_get_next_readlocation_withoffset() + * + * Get the next read location + offset for the specified ring buffer. + * This allows the caller to skip + */ static inline u32 hv_get_next_readlocation_withoffset(struct hv_ring_buffer_info *ring_info, u32 offset) { u32 next = ring_info->ring_buffer->read_index; - /* ASSERT(next < ring_info->RingDataSize); */ next += offset; next %= ring_info->ring_datasize; return next; } -/*++ - -Name: - hv_set_next_read_location() - -Description: - Set the next read location for the specified ring buffer - ---*/ +/* + * + * hv_set_next_read_location() + * + * Set the next read location for the specified ring buffer + * + */ static inline void hv_set_next_read_location(struct hv_ring_buffer_info *ring_info, u32 next_read_location) @@ -153,15 +130,12 @@ hv_set_next_read_location(struct hv_ring_buffer_info *ring_info, } -/*++ - -Name: - hv_get_ring_buffer() - -Description: - Get the start of the ring buffer - ---*/ +/* + * + * hv_get_ring_buffer() + * + * Get the start of the ring buffer + */ static inline void * hv_get_ring_buffer(struct hv_ring_buffer_info *ring_info) { @@ -169,30 +143,25 @@ hv_get_ring_buffer(struct hv_ring_buffer_info *ring_info) } -/*++ - -Name: - hv_get_ring_buffersize() - -Description: - Get the size of the ring buffer - ---*/ +/* + * + * hv_get_ring_buffersize() + * + * Get the size of the ring buffer + */ static inline u32 hv_get_ring_buffersize(struct hv_ring_buffer_info *ring_info) { return ring_info->ring_datasize; } -/*++ - -Name: - hv_get_ring_bufferindices() - -Description: - Get the read and write indices as u64 of the specified ring buffer - ---*/ +/* + * + * hv_get_ring_bufferindices() + * + * Get the read and write indices as u64 of the specified ring buffer + * + */ static inline u64 hv_get_ring_bufferindices(struct hv_ring_buffer_info *ring_info) { @@ -200,15 +169,13 @@ hv_get_ring_bufferindices(struct hv_ring_buffer_info *ring_info) } -/*++ - -Name: - hv_dump_ring_info() - -Description: - Dump out to console the ring buffer info - ---*/ +/* + * + * hv_dump_ring_info() + * + * Dump out to console the ring buffer info + * + */ void hv_dump_ring_info(struct hv_ring_buffer_info *ring_info, char *prefix) { u32 bytes_avail_towrite; @@ -232,7 +199,6 @@ void hv_dump_ring_info(struct hv_ring_buffer_info *ring_info, char *prefix) } -/* Internal routines */ static u32 hv_copyto_ringbuffer( @@ -250,15 +216,13 @@ hv_copyfrom_ringbuffer( -/*++ - -Name: - hv_ringbuffer_get_debuginfo() - -Description: - Get various debug metrics for the specified ring buffer - ---*/ +/* + * + * hv_ringbuffer_get_debuginfo() + * + * Get various debug metrics for the specified ring buffer + * + */ void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info, struct hv_ring_buffer_debug_info *debug_info) { @@ -282,29 +246,25 @@ void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info, } -/*++ - -Name: - hv_get_ringbuffer_interrupt_mask() - -Description: - Get the interrupt mask for the specified ring buffer - ---*/ +/* + * + * hv_get_ringbuffer_interrupt_mask() + * + * Get the interrupt mask for the specified ring buffer + * + */ u32 hv_get_ringbuffer_interrupt_mask(struct hv_ring_buffer_info *rbi) { return rbi->ring_buffer->interrupt_mask; } -/*++ - -Name: - hv_ringbuffer_init() - -Description: - Initialize the ring buffer - ---*/ +/* + * + * hv_ringbuffer_init() + * + *Initialize the ring buffer + * + */ int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, void *buffer, u32 buflen) { @@ -325,28 +285,24 @@ int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, return 0; } -/*++ - -Name: - hv_ringbuffer_cleanup() - -Description: - Cleanup the ring buffer - ---*/ +/* + * + * hv_ringbuffer_cleanup() + * + * Cleanup the ring buffer + * + */ void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info) { } -/*++ - -Name: - hv_ringbuffer_write() - -Description: - Write to the ring buffer - ---*/ +/* + * + * hv_ringbuffer_write() + * + * Write to the ring buffer + * + */ int hv_ringbuffer_write(struct hv_ring_buffer_info *outring_info, struct scatterlist *sglist, u32 sgcount) { @@ -373,7 +329,6 @@ int hv_ringbuffer_write(struct hv_ring_buffer_info *outring_info, &bytes_avail_toread, &bytes_avail_towrite); - /* 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 */ @@ -408,22 +363,19 @@ int hv_ringbuffer_write(struct hv_ring_buffer_info *outring_info, /* Now, update the write location */ hv_set_next_write_location(outring_info, next_write_location); - /* Dumpring_info(Outring_info, "AFTER "); */ spin_unlock_irqrestore(&outring_info->ring_lock, flags); return 0; } -/*++ - -Name: - hv_ringbuffer_peek() - -Description: - Read without advancing the read index - ---*/ +/* + * + * hv_ringbuffer_peek() + * + * Read without advancing the read index + * + */ int hv_ringbuffer_peek(struct hv_ring_buffer_info *Inring_info, void *Buffer, u32 buflen) { @@ -440,11 +392,6 @@ int hv_ringbuffer_peek(struct hv_ring_buffer_info *Inring_info, /* Make sure there is something to read */ if (bytes_avail_toread < buflen) { - /* DPRINT_DBG(VMBUS, - "got callback but not enough to read " - "!!", - bytes_avail_toread, - BufferLen); */ spin_unlock_irqrestore(&Inring_info->ring_lock, flags); @@ -465,15 +412,13 @@ int hv_ringbuffer_peek(struct hv_ring_buffer_info *Inring_info, } -/*++ - -Name: - hv_ringbuffer_read() - -Description: - Read and advance the read index - ---*/ +/* + * + * hv_ringbuffer_read() + * + * Read and advance the read index + * + */ int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info, void *buffer, u32 buflen, u32 offset) { @@ -492,8 +437,6 @@ int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info, void *buffer, &bytes_avail_toread, &bytes_avail_towrite); - /* Dumpring_info(Inring_info, "BEFORE "); */ - /* Make sure there is something to read */ if (bytes_avail_toread < buflen) { spin_unlock_irqrestore(&inring_info->ring_lock, flags); @@ -522,24 +465,20 @@ int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info, void *buffer, /* Update the read index */ hv_set_next_read_location(inring_info, next_read_location); - /* Dumpring_info(Inring_info, "AFTER "); */ - spin_unlock_irqrestore(&inring_info->ring_lock, flags); return 0; } -/*++ - -Name: - hv_copyto_ringbuffer() - -Description: - Helper routine to copy from source to ring buffer. - Assume there is enough room. Handles wrap-around in dest case only!! - ---*/ +/* + * + * hv_copyto_ringbuffer() + * + * Helper routine to copy from source to ring buffer. + * Assume there is enough room. Handles wrap-around in dest case only!! + * + */ static u32 hv_copyto_ringbuffer( struct hv_ring_buffer_info *ring_info, @@ -566,16 +505,14 @@ hv_copyto_ringbuffer( } -/*++ - -Name: - hv_copyfrom_ringbuffer() - -Description: - Helper routine to copy to source from ring buffer. - Assume there is enough room. Handles wrap-around in src case only!! - ---*/ +/* + * + * hv_copyfrom_ringbuffer() + * + * Helper routine to copy to source from ring buffer. + * Assume there is enough room. Handles wrap-around in src case only!! + * + */ static u32 hv_copyfrom_ringbuffer( struct hv_ring_buffer_info *ring_info, @@ -605,5 +542,3 @@ hv_copyfrom_ringbuffer( return start_read_offset; } - -/* eof */