[dpdk-dev] [PATCH] crypto/dpaa_sec: dynamic contxt buffer for SG cases

[Akhil Goyal <akhil.goyal@nxp.com>]

From: Hemant Agrawal <hemant.agrawal@nxp.com>

This patch allocate/clean the SEC context dynamically
based on the number of SG entries in the buffer.

Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>
Acked-by: Akhil Goyal <akhil.goyal@nxp.com>
---
 drivers/crypto/dpaa_sec/dpaa_sec.c | 43 ++++++++++++++----------------
 drivers/crypto/dpaa_sec/dpaa_sec.h |  8 +++---
 2 files changed, 23 insertions(+), 28 deletions(-)

diff --git a/drivers/crypto/dpaa_sec/dpaa_sec.c b/drivers/crypto/dpaa_sec/dpaa_sec.c
index b5bb87aa6..34e6e4f0e 100644
--- a/drivers/crypto/dpaa_sec/dpaa_sec.c
+++ b/drivers/crypto/dpaa_sec/dpaa_sec.c
@@ -65,10 +65,10 @@ dpaa_sec_op_ending(struct dpaa_sec_op_ctx *ctx)
 }
 
 static inline struct dpaa_sec_op_ctx *
-dpaa_sec_alloc_ctx(dpaa_sec_session *ses)
+dpaa_sec_alloc_ctx(dpaa_sec_session *ses, int sg_count)
 {
 	struct dpaa_sec_op_ctx *ctx;
-	int retval;
+	int i, retval;
 
 	retval = rte_mempool_get(ses->ctx_pool, (void **)(&ctx));
 	if (!ctx || retval) {
@@ -81,14 +81,11 @@ dpaa_sec_alloc_ctx(dpaa_sec_session *ses)
 	 * to clear all the SG entries. dpaa_sec_alloc_ctx() is called for
 	 * each packet, memset is costlier than dcbz_64().
 	 */
-	dcbz_64(&ctx->job.sg[SG_CACHELINE_0]);
-	dcbz_64(&ctx->job.sg[SG_CACHELINE_1]);
-	dcbz_64(&ctx->job.sg[SG_CACHELINE_2]);
-	dcbz_64(&ctx->job.sg[SG_CACHELINE_3]);
+	for (i = 0; i < sg_count && i < MAX_JOB_SG_ENTRIES; i += 4)
+		dcbz_64(&ctx->job.sg[i]);
 
 	ctx->ctx_pool = ses->ctx_pool;
-	ctx->vtop_offset = (size_t) ctx
-				- rte_mempool_virt2iova(ctx);
+	ctx->vtop_offset = (size_t) ctx - rte_mempool_virt2iova(ctx);
 
 	return ctx;
 }
@@ -855,12 +852,12 @@ build_auth_only_sg(struct rte_crypto_op *op, dpaa_sec_session *ses)
 	else
 		extra_segs = 2;
 
-	if ((mbuf->nb_segs + extra_segs) > MAX_SG_ENTRIES) {
+	if (mbuf->nb_segs > MAX_SG_ENTRIES) {
 		DPAA_SEC_DP_ERR("Auth: Max sec segs supported is %d",
 				MAX_SG_ENTRIES);
 		return NULL;
 	}
-	ctx = dpaa_sec_alloc_ctx(ses);
+	ctx = dpaa_sec_alloc_ctx(ses, mbuf->nb_segs + extra_segs);
 	if (!ctx)
 		return NULL;
 
@@ -938,7 +935,7 @@ build_auth_only(struct rte_crypto_op *op, dpaa_sec_session *ses)
 	rte_iova_t start_addr;
 	uint8_t *old_digest;
 
-	ctx = dpaa_sec_alloc_ctx(ses);
+	ctx = dpaa_sec_alloc_ctx(ses, 4);
 	if (!ctx)
 		return NULL;
 
@@ -1008,13 +1005,13 @@ build_cipher_only_sg(struct rte_crypto_op *op, dpaa_sec_session *ses)
 		req_segs = mbuf->nb_segs * 2 + 3;
 	}
 
-	if (req_segs > MAX_SG_ENTRIES) {
+	if (mbuf->nb_segs > MAX_SG_ENTRIES) {
 		DPAA_SEC_DP_ERR("Cipher: Max sec segs supported is %d",
 				MAX_SG_ENTRIES);
 		return NULL;
 	}
 
-	ctx = dpaa_sec_alloc_ctx(ses);
+	ctx = dpaa_sec_alloc_ctx(ses, req_segs);
 	if (!ctx)
 		return NULL;
 
@@ -1094,7 +1091,7 @@ build_cipher_only(struct rte_crypto_op *op, dpaa_sec_session *ses)
 	uint8_t *IV_ptr = rte_crypto_op_ctod_offset(op, uint8_t *,
 			ses->iv.offset);
 
-	ctx = dpaa_sec_alloc_ctx(ses);
+	ctx = dpaa_sec_alloc_ctx(ses, 4);
 	if (!ctx)
 		return NULL;
 
@@ -1161,13 +1158,13 @@ build_cipher_auth_gcm_sg(struct rte_crypto_op *op, dpaa_sec_session *ses)
 	if (ses->auth_only_len)
 		req_segs++;
 
-	if (req_segs > MAX_SG_ENTRIES) {
+	if (mbuf->nb_segs > MAX_SG_ENTRIES) {
 		DPAA_SEC_DP_ERR("AEAD: Max sec segs supported is %d",
 				MAX_SG_ENTRIES);
 		return NULL;
 	}
 
-	ctx = dpaa_sec_alloc_ctx(ses);
+	ctx = dpaa_sec_alloc_ctx(ses, req_segs);
 	if (!ctx)
 		return NULL;
 
@@ -1296,7 +1293,7 @@ build_cipher_auth_gcm(struct rte_crypto_op *op, dpaa_sec_session *ses)
 	else
 		dst_start_addr = src_start_addr;
 
-	ctx = dpaa_sec_alloc_ctx(ses);
+	ctx = dpaa_sec_alloc_ctx(ses, 7);
 	if (!ctx)
 		return NULL;
 
@@ -1409,13 +1406,13 @@ build_cipher_auth_sg(struct rte_crypto_op *op, dpaa_sec_session *ses)
 		req_segs = mbuf->nb_segs * 2 + 4;
 	}
 
-	if (req_segs > MAX_SG_ENTRIES) {
+	if (mbuf->nb_segs > MAX_SG_ENTRIES) {
 		DPAA_SEC_DP_ERR("Cipher-Auth: Max sec segs supported is %d",
 				MAX_SG_ENTRIES);
 		return NULL;
 	}
 
-	ctx = dpaa_sec_alloc_ctx(ses);
+	ctx = dpaa_sec_alloc_ctx(ses, req_segs);
 	if (!ctx)
 		return NULL;
 
@@ -1533,7 +1530,7 @@ build_cipher_auth(struct rte_crypto_op *op, dpaa_sec_session *ses)
 	else
 		dst_start_addr = src_start_addr;
 
-	ctx = dpaa_sec_alloc_ctx(ses);
+	ctx = dpaa_sec_alloc_ctx(ses, 7);
 	if (!ctx)
 		return NULL;
 
@@ -1619,7 +1616,7 @@ build_proto(struct rte_crypto_op *op, dpaa_sec_session *ses)
 	struct qm_sg_entry *sg;
 	phys_addr_t src_start_addr, dst_start_addr;
 
-	ctx = dpaa_sec_alloc_ctx(ses);
+	ctx = dpaa_sec_alloc_ctx(ses, 2);
 	if (!ctx)
 		return NULL;
 	cf = &ctx->job;
@@ -1666,13 +1663,13 @@ build_proto_sg(struct rte_crypto_op *op, dpaa_sec_session *ses)
 		mbuf = sym->m_src;
 	}
 	req_segs = mbuf->nb_segs + sym->m_src->nb_segs + 2;
-	if (req_segs > MAX_SG_ENTRIES) {
+	if (mbuf->nb_segs > MAX_SG_ENTRIES) {
 		DPAA_SEC_DP_ERR("Proto: Max sec segs supported is %d",
 				MAX_SG_ENTRIES);
 		return NULL;
 	}
 
-	ctx = dpaa_sec_alloc_ctx(ses);
+	ctx = dpaa_sec_alloc_ctx(ses, req_segs);
 	if (!ctx)
 		return NULL;
 	cf = &ctx->job;
diff --git a/drivers/crypto/dpaa_sec/dpaa_sec.h b/drivers/crypto/dpaa_sec/dpaa_sec.h
index e148a04df..a2d588e1c 100644
--- a/drivers/crypto/dpaa_sec/dpaa_sec.h
+++ b/drivers/crypto/dpaa_sec/dpaa_sec.h
@@ -182,13 +182,11 @@ struct dpaa_sec_dev_private {
 };
 
 #define MAX_SG_ENTRIES		16
-#define SG_CACHELINE_0		0
-#define SG_CACHELINE_1		4
-#define SG_CACHELINE_2		8
-#define SG_CACHELINE_3		12
+#define MAX_JOB_SG_ENTRIES	36
+
 struct dpaa_sec_job {
 	/* sg[0] output, sg[1] input, others are possible sub frames */
-	struct qm_sg_entry sg[MAX_SG_ENTRIES];
+	struct qm_sg_entry sg[MAX_JOB_SG_ENTRIES];
 };
 
 #define DPAA_MAX_NB_MAX_DIGEST	32
-- 
2.17.1