[PATCH v4] 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>
Tested-by: Ting-Kai Ku <ting-kai.ku@intel.com>
Acked-by: Ciara Power <ciara.power@intel.com>
Acked-by: Kai Ji <kai.ji@intel.com>
---
v4: replaced plain if with RTE_ASSERT

 examples/ipsec-secgw/ipsec.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/examples/ipsec-secgw/ipsec.c b/examples/ipsec-secgw/ipsec.c
index f5cec4a928..c321108119 100644
--- a/examples/ipsec-secgw/ipsec.c
+++ b/examples/ipsec-secgw/ipsec.c
@@ -288,10 +288,21 @@ 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;
+			struct rte_cryptodev_info dev_info_1, dev_info_2;
+			rte_cryptodev_info_get(cdev_id, &dev_info_1);
+			rte_cryptodev_info_get(ipsec_ctx->tbl[cdev_id_qp].id,
+					&dev_info_2);
+			if (dev_info_1.driver_id == dev_info_2.driver_id) {
+				RTE_LOG(WARNING, IPSEC,
+					"SA mapped to multiple cryptodevs for SPI %d\n",
+					sa->spi);
+
+			} else {
+				RTE_LOG(WARNING, IPSEC,
+					"SA mapped to multiple cryptodevs of different types for SPI %d\n",
+					sa->spi);
+
+			}
 		}
 
 		/* Store per core queue pair information */
@@ -908,6 +919,7 @@ ipsec_enqueue(ipsec_xform_fn xform_func, struct ipsec_ctx *ipsec_ctx,
 			continue;
 		}
 
+		RTE_ASSERT(sa->cqp[ipsec_ctx->lcore_id] != NULL);
 		enqueue_cop(sa->cqp[ipsec_ctx->lcore_id], &priv->cop);
 	}
 }
-- 
2.34.1