lib: Provide a lock enabled iteration of fifo.

Implement a lock enabled iteration for fifo so that
caller can determine if next entry can be skipped or
any existing entries in fifo can be updated before enqueue.

Signed-off-by: Atish Patra <atish.patra@wdc.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/include/sbi/sbi_fifo.h b/include/sbi/sbi_fifo.h
index 3754a5e..f9e2ca9 100644
--- a/include/sbi/sbi_fifo.h
+++ b/include/sbi/sbi_fifo.h
@@ -23,11 +23,21 @@ struct sbi_fifo {
 	u16 tail;
 };
 
+enum sbi_fifo_inplace_update_types {
+	SBI_FIFO_SKIP,
+	SBI_FIFO_UPDATED,
+	SBI_FIFO_RESET,
+	SBI_FIFO_UNCHANGED,
+};
+
 int sbi_fifo_dequeue(struct sbi_fifo *fifo, void *data);
 int sbi_fifo_enqueue(struct sbi_fifo *fifo, void *data);
 void sbi_fifo_init(struct sbi_fifo *fifo, void *queue_mem,
 		   u16 entries, u16 entry_size);
 bool sbi_fifo_is_empty(struct sbi_fifo *fifo);
 bool sbi_fifo_is_full(struct sbi_fifo *fifo);
+int sbi_fifo_inplace_update(struct sbi_fifo *fifo, void *in,
+			  int (*fptr) (void *in, void *data));
+u16 sbi_fifo_avail(struct sbi_fifo *fifo);
 
 #endif