>-----Original Message-----
>From: dev [mailto:dev-boun...@dpdk.org] On Behalf Of Fiona Trahe
>Sent: 16 May 2018 19:49
>To: dev@dpdk.org
>Cc: pablo.de.lara.gua...@intel.com; fiona.tr...@intel.com
>Subject: [dpdk-dev] [PATCH] compressdev: clarify buffer size limitation
>
>Signed-off-by: Fiona Trahe <fiona.tr...@intel.com>
>---
> lib/librte_compressdev/rte_comp.h | 11 +++++++++--
> 1 file changed, 9 insertions(+), 2 deletions(-)
>
>diff --git a/lib/librte_compressdev/rte_comp.h
>b/lib/librte_compressdev/rte_comp.h
>index 4c802195f..9826086b1 100644
>--- a/lib/librte_compressdev/rte_comp.h
>+++ b/lib/librte_compressdev/rte_comp.h
>@@ -295,12 +295,19 @@ struct rte_comp_op {
> struct rte_mbuf *m_src;
> /**< source mbuf
> * The total size of the input buffer(s) can be retrieved using
>- * rte_pktmbuf_data_len(m_src)
>+ * rte_pktmbuf_data_len(m_src). The max data size which can fit in a
>+ * single mbuf is limited by the uint16_t rte_mbuf.data_len to 64k-1.
>+ * If the input data is bigger than this it can be passed to the PMD in
>+ * a chain of mbufs if the PMD's capabilities indicate it supports this.
> */
> struct rte_mbuf *m_dst;
> /**< destination mbuf
> * The total size of the output buffer(s) can be retrieved using
>- * rte_pktmbuf_data_len(m_dst)
>+ * rte_pktmbuf_data_len(m_dst). The max data size which can fit in a
>+ * single mbuf is limited by the uint16_t rte_mbuf.data_len to 64k-1.
>+ * If the output data is expected to be bigger than this a chain of
>+ * mbufs can be passed to the PMD if the PMD's capabilities indicate
>+ * it supports this.
> */
[Shally] It will be good idea to add bit more clarification regarding
src.offset and dst.offset as well, that is, offset is offset from start of very
first segment of m_src and m_dst in chained bufs.
>
> struct {
>--
>2.13.6
