[dpdk-dev] [PATCH v4 07/10] common/dpaax: enhance caamflib with inline keys

[Hemant Agrawal <hemant.agrawal@nxp.com>]

From: Franck LENORMAND <franck.lenormand@nxp.com>

The space in descriptor buffer is scarce as it is limited to
64 words for platforms except ERA10 (which has 128).

As the descriptors are processed with QI, it adds some words
to the descriptor which is passed.

Some descriptors used for SDAP were using too much words reaching
the limit.

This patch reduces the number of words used by removing the inlining
of some keys (done for performance) in order to have working
descriptors.

Signed-off-by: Franck LENORMAND <franck.lenormand@nxp.com>
---
 drivers/common/dpaax/caamflib/desc/sdap.h   | 61 ++++++++++++++++++++-
 drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c | 28 ++++++++--
 2 files changed, 81 insertions(+), 8 deletions(-)

diff --git a/drivers/common/dpaax/caamflib/desc/sdap.h b/drivers/common/dpaax/caamflib/desc/sdap.h
index d5d5850b4f..b2497a5424 100644
--- a/drivers/common/dpaax/caamflib/desc/sdap.h
+++ b/drivers/common/dpaax/caamflib/desc/sdap.h
@@ -20,6 +20,63 @@
 #define SDAP_BITS_SIZE (SDAP_BYTE_SIZE * 8)
 #endif
 
+/**
+ * rta_inline_pdcp_query() - Provide indications if a key can be passed as
+ *                           immediate data or shall be referenced in a
+ *                           shared descriptor.
+ * Return: 0 if data can be inlined or 1 if referenced.
+ */
+static inline int
+rta_inline_pdcp_sdap_query(enum auth_type_pdcp auth_alg,
+		      enum cipher_type_pdcp cipher_alg,
+		      enum pdcp_sn_size sn_size,
+		      int8_t hfn_ovd)
+{
+	int nb_key_to_inline = 0;
+
+	if ((cipher_alg != PDCP_CIPHER_TYPE_NULL) &&
+			(auth_alg != PDCP_AUTH_TYPE_NULL))
+		return 2;
+	else
+		return 0;
+
+	/**
+	 * Shared Descriptors for some of the cases does not fit in the
+	 * MAX_DESC_SIZE of the descriptor
+	 * The cases which exceed are for RTA_SEC_ERA=8 and HFN override
+	 * enabled and 12/18 bit uplane and either of following Algo combo.
+	 * - AES-SNOW
+	 * - AES-ZUC
+	 * - SNOW-SNOW
+	 * - SNOW-ZUC
+	 * - ZUC-SNOW
+	 * - ZUC-SNOW
+	 *
+	 * We cannot make inline for all cases, as this will impact performance
+	 * due to extra memory accesses for the keys.
+	 */
+
+	/* Inline only the cipher key */
+	if ((rta_sec_era == RTA_SEC_ERA_8) && hfn_ovd &&
+		((sn_size == PDCP_SN_SIZE_12) ||
+		 (sn_size == PDCP_SN_SIZE_18)) &&
+		(cipher_alg != PDCP_CIPHER_TYPE_NULL) &&
+		((auth_alg == PDCP_AUTH_TYPE_SNOW) ||
+		 (auth_alg == PDCP_AUTH_TYPE_ZUC))) {
+
+		nb_key_to_inline++;
+
+		/* Sub case where inlining another key is required */
+		if ((cipher_alg == PDCP_CIPHER_TYPE_AES) &&
+			(auth_alg == PDCP_AUTH_TYPE_SNOW))
+			nb_key_to_inline++;
+	}
+
+	/* Inline both keys */
+
+	return nb_key_to_inline;
+}
+
 static inline void key_loading_opti(struct program *p,
 				    struct alginfo *cipherdata,
 				    struct alginfo *authdata)
@@ -788,8 +845,8 @@ pdcp_sdap_insert_cplane_null_op(struct program *p,
 			   unsigned char era_2_sw_hfn_ovrd,
 			   enum pdb_type_e pdb_type __maybe_unused)
 {
-	return pdcp_insert_cplane_int_only_op(p, swap, cipherdata, authdata,
-					dir, sn_size, era_2_sw_hfn_ovrd);
+	return pdcp_insert_cplane_null_op(p, swap, cipherdata, authdata, dir,
+					  sn_size, era_2_sw_hfn_ovrd);
 }
 
 static inline int
diff --git a/drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c b/drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c
index 1ccead3641..6b6fee828b 100644
--- a/drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c
+++ b/drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c
@@ -3261,12 +3261,28 @@ dpaa2_sec_set_pdcp_session(struct rte_cryptodev *dev,
 		goto out;
 	}
 
-	if (rta_inline_pdcp_query(authdata.algtype,
-				cipherdata.algtype,
-				session->pdcp.sn_size,
-				session->pdcp.hfn_ovd)) {
-		cipherdata.key = DPAA2_VADDR_TO_IOVA(cipherdata.key);
-		cipherdata.key_type = RTA_DATA_PTR;
+	if (pdcp_xform->sdap_enabled) {
+		int nb_keys_to_inline =
+			rta_inline_pdcp_sdap_query(authdata.algtype,
+					cipherdata.algtype,
+					session->pdcp.sn_size,
+					session->pdcp.hfn_ovd);
+		if (nb_keys_to_inline >= 1) {
+			cipherdata.key = DPAA2_VADDR_TO_IOVA(cipherdata.key);
+			cipherdata.key_type = RTA_DATA_PTR;
+		}
+		if (nb_keys_to_inline >= 2) {
+			authdata.key = DPAA2_VADDR_TO_IOVA(authdata.key);
+			authdata.key_type = RTA_DATA_PTR;
+		}
+	} else {
+		if (rta_inline_pdcp_query(authdata.algtype,
+					cipherdata.algtype,
+					session->pdcp.sn_size,
+					session->pdcp.hfn_ovd)) {
+			cipherdata.key = DPAA2_VADDR_TO_IOVA(cipherdata.key);
+			cipherdata.key_type = RTA_DATA_PTR;
+		}
 	}
 
 	if (pdcp_xform->domain == RTE_SECURITY_PDCP_MODE_CONTROL) {
-- 
2.17.1