[PATCH v2] examples/ipsec-secgw: fix cryptodev to SA mapping

[Radu Nicolau <radu.nicolau@intel.com>]

There are use cases where a SA should be able to use different cryptodevs on
different lcores, for example there can be cryptodevs with just 1 qp per VF.
For this purpose this patch relaxes the check in create lookaside session function.
Also add a check to verify that a CQP is available for the current lcore.

Fixes: a8ade12123c3 ("examples/ipsec-secgw: create lookaside sessions at init")
Cc: stable@dpdk.org
Cc: vfialko@marvell.com

Signed-off-by: Radu Nicolau <radu.nicolau@intel.com>
Signed-off-by: Radu Nicolau <radu.nicolau@intel.com>
Tested-by: Ting-Kai Ku <ting-kai.ku@intel.com>
Signed-off-by: Radu Nicolau <radu.nicolau@intel.com>
Acked-by: Ciara Power <ciara.power@intel.com>
Acked-by: Kai Ji <kai.ji@intel.com>
---
v2: add likely to CQP available branch

 examples/ipsec-secgw/ipsec.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/examples/ipsec-secgw/ipsec.c b/examples/ipsec-secgw/ipsec.c
index f5cec4a928..7bb9646736 100644
--- a/examples/ipsec-secgw/ipsec.c
+++ b/examples/ipsec-secgw/ipsec.c
@@ -288,10 +288,9 @@ create_lookaside_session(struct ipsec_ctx *ipsec_ctx_lcore[],
 		if (cdev_id == RTE_CRYPTO_MAX_DEVS)
 			cdev_id = ipsec_ctx->tbl[cdev_id_qp].id;
 		else if (cdev_id != ipsec_ctx->tbl[cdev_id_qp].id) {
-			RTE_LOG(ERR, IPSEC,
-					"SA mapping to multiple cryptodevs is "
-					"not supported!");
-			return -EINVAL;
+			RTE_LOG(WARNING, IPSEC,
+				"SA mapped to multiple cryptodevs for SPI %d\n",
+				sa->spi);
 		}
 
 		/* Store per core queue pair information */
@@ -908,7 +907,11 @@ ipsec_enqueue(ipsec_xform_fn xform_func, struct ipsec_ctx *ipsec_ctx,
 			continue;
 		}
 
-		enqueue_cop(sa->cqp[ipsec_ctx->lcore_id], &priv->cop);
+		if (likely(sa->cqp[ipsec_ctx->lcore_id]))
+			enqueue_cop(sa->cqp[ipsec_ctx->lcore_id], &priv->cop);
+		else
+			RTE_LOG(ERR, IPSEC, "No CQP available for lcore %d\n",
+					ipsec_ctx->lcore_id);
 	}
 }
 
-- 
2.34.1