svm: support for multi-segment enqueues

[vpp.git] / src / svm / svm_fifo.h

diff --git a/src/svm/svm_fifo.h b/src/svm/svm_fifo.h
index 93ef006..4239e9d 100644 (file)
--- a/src/svm/svm_fifo.h
+++ b/src/svm/svm_fifo.h
@@ -291,6 +291,17 @@ int svm_fifo_enqueue_with_offset (svm_fifo_t * f, u32 offset, u32 len,
  * @param len          number of bytes to add to tail
  */
 void svm_fifo_enqueue_nocopy (svm_fifo_t * f, u32 len);
+/**
+ * Enqueue array of @ref svm_fifo_seg_t in order
+ *
+ * @param f            fifo
+ * @param segs         array of segments to enqueue
+ * @param n_segs       number of segments
+ * @param allow_partial        if set partial enqueues are allowed
+ * @return             len if enqueue was successful, error otherwise
+ */
+int svm_fifo_enqueue_segments (svm_fifo_t * f, const svm_fifo_seg_t segs[],
+                              u32 n_segs, u8 allow_partial);
 /**
  * Overwrite fifo head with new data
  *
@@ -357,13 +368,14 @@ void svm_fifo_dequeue_drop_all (svm_fifo_t * f);
  * data is consumed.
  *
  * @param f            fifo
+ * @param offset       offset from where to retrieve segments
  * @param fs           array of fifo segments allocated by caller
  * @param n_segs       number of fifo segments in array
  * @param max_bytes    max bytes to be mapped to fifo segments
  * @return             number of bytes in fifo segments or SVM_FIFO_EEMPTY
  */
-int svm_fifo_segments (svm_fifo_t * f, svm_fifo_seg_t * fs, u32 n_segs,
-                      u32 max_bytes);
+int svm_fifo_segments (svm_fifo_t * f, u32 offset, svm_fifo_seg_t * fs,
+                      u32 n_segs, u32 max_bytes);
 /**
  * Add io events subscriber to list
  *