[dpdk-dev] [PATCH v4 02/15] crypto: add total raw buffer length

[Hemant Agrawal]

From: Gagandeep Singh <g.singh at nxp.com>

The current crypto raw data vectors is extended to support
rte_security usecases, where we need total data length to know
how much additional memory space is available in buffer other
than data length so that driver/HW can write expanded size
data after encryption.

Signed-off-by: Gagandeep Singh <g.singh at nxp.com>
Acked-by: Akhil Goyal <gakhil at marvell.com>
---
 doc/guides/rel_notes/deprecation.rst | 7 -------
 lib/cryptodev/rte_crypto_sym.h       | 7 +++++++
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index a4e86b31f5..53155459a0 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -188,13 +188,6 @@ Deprecation Notices
   This field will be null for inplace processing.
   This change is targeted for DPDK 21.11.
 
-* cryptodev: The structure ``rte_crypto_vec`` would be updated to add
-  ``tot_len`` to support total buffer length.
-  This is required for security cases like IPsec and PDCP encryption offload
-  to know how much additional memory space is available in buffer other than
-  data length so that driver/HW can write expanded size data after encryption.
-  This change is targeted for DPDK 21.11.
-
 * cryptodev: Hide structures ``rte_cryptodev_sym_session`` and
   ``rte_cryptodev_asym_session`` to remove unnecessary indirection between
   session and the private data of session. An opaque pointer can be exposed
diff --git a/lib/cryptodev/rte_crypto_sym.h b/lib/cryptodev/rte_crypto_sym.h
index dcc0bd5933..6be283e83c 100644
--- a/lib/cryptodev/rte_crypto_sym.h
+++ b/lib/cryptodev/rte_crypto_sym.h
@@ -37,6 +37,8 @@ struct rte_crypto_vec {
 	rte_iova_t iova;
 	/** length of the data buffer */
 	uint32_t len;
+	/** total buffer length */
+	uint32_t tot_len;
 };
 
 /**
@@ -980,12 +982,14 @@ rte_crypto_mbuf_to_vec(const struct rte_mbuf *mb, uint32_t ofs, uint32_t len,
 	seglen = mb->data_len - ofs;
 	if (len <= seglen) {
 		vec[0].len = len;
+		vec[0].tot_len = mb->buf_len - rte_pktmbuf_headroom(mb) - ofs;
 		return 1;
 	}
 
 	/* data spread across segments */
 	vec[0].len = seglen;
 	left = len - seglen;
+	vec[0].tot_len = mb->buf_len - rte_pktmbuf_headroom(mb) - ofs;
 	for (i = 1, nseg = mb->next; nseg != NULL; nseg = nseg->next, i++) {
 
 		vec[i].base = rte_pktmbuf_mtod(nseg, void *);
@@ -995,6 +999,8 @@ rte_crypto_mbuf_to_vec(const struct rte_mbuf *mb, uint32_t ofs, uint32_t len,
 		if (left <= seglen) {
 			/* whole requested data is completed */
 			vec[i].len = left;
+			vec[i].tot_len = mb->buf_len - rte_pktmbuf_headroom(mb)
+					- ofs;
 			left = 0;
 			break;
 		}
@@ -1002,6 +1008,7 @@ rte_crypto_mbuf_to_vec(const struct rte_mbuf *mb, uint32_t ofs, uint32_t len,
 		/* use whole segment */
 		vec[i].len = seglen;
 		left -= seglen;
+		vec[i].tot_len = mb->buf_len - rte_pktmbuf_headroom(mb) - ofs;
 	}
 
 	RTE_ASSERT(left == 0);
-- 
2.17.1