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authorFlorin Coras <fcoras@cisco.com>2020-09-25 15:18:13 -0700
committerDamjan Marion <dmarion@me.com>2020-09-29 09:02:48 +0000
commitd68faf8559da72aa6ad0526d5a86fb16587b1508 (patch)
tree8438ccf4ef312017465f073e5b7086abdd094cf3 /src/svm/svm_fifo.h
parenta880b276d9998fa06c92355c4144fe3ca574c915 (diff)
vcl svm: provide apps access to fifo chunks
Type: feature Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: I2191b8594b1e87ecc00f237316457db249f73603
Diffstat (limited to 'src/svm/svm_fifo.h')
-rw-r--r--src/svm/svm_fifo.h18
1 files changed, 16 insertions, 2 deletions
diff --git a/src/svm/svm_fifo.h b/src/svm/svm_fifo.h
index f7503c8e900..93ef006fd48 100644
--- a/src/svm/svm_fifo.h
+++ b/src/svm/svm_fifo.h
@@ -348,8 +348,22 @@ int svm_fifo_dequeue_drop (svm_fifo_t * f, u32 len);
* @param f fifo
*/
void svm_fifo_dequeue_drop_all (svm_fifo_t * f);
-int svm_fifo_segments (svm_fifo_t * f, svm_fifo_seg_t * fs);
-void svm_fifo_segments_free (svm_fifo_t * f, svm_fifo_seg_t * fs);
+/**
+ * Get pointers to fifo chunks data in @ref svm_fifo_seg_t array
+ *
+ * Populates fifo segment array with pointers to fifo chunk data and lengths.
+ * Because this returns pointers to data, it must be paired with
+ * @ref svm_fifo_dequeue_drop to actually release the fifo chunks after the
+ * data is consumed.
+ *
+ * @param f fifo
+ * @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);
/**
* Add io events subscriber to list
*