[dpdk-dev] [PATCH] net/ixgbe: check if security capabilities are enabled by HW

[Radu Nicolau]

Check if the security enable bits are not fused before setting
offload capabilities for security

Signed-off-by: Radu Nicolau <radu.nicolau at intel.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c |  6 ++++--
 drivers/net/ixgbe/ixgbe_ipsec.c  | 15 +++++++++++++++
 drivers/net/ixgbe/ixgbe_ipsec.h  |  1 +
 3 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 43e0132..4f2ab2f 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -3685,8 +3685,10 @@ ixgbe_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 		dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM;
 
 #ifdef RTE_LIBRTE_SECURITY
-	dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_SECURITY;
-	dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_SECURITY;
+	if (ixgbe_crypto_capable(dev)) {
+		dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_SECURITY;
+		dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_SECURITY;
+	}
 #endif
 
 	dev_info->default_rxconf = (struct rte_eth_rxconf) {
diff --git a/drivers/net/ixgbe/ixgbe_ipsec.c b/drivers/net/ixgbe/ixgbe_ipsec.c
index 97f025a8..a495679 100644
--- a/drivers/net/ixgbe/ixgbe_ipsec.c
+++ b/drivers/net/ixgbe/ixgbe_ipsec.c
@@ -602,6 +602,21 @@ ixgbe_crypto_capabilities_get(void *device __rte_unused)
 
 
 int
+ixgbe_crypto_capable(struct rte_eth_dev *dev)
+{
+	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	uint32_t reg_i, reg, capable = 1;
+	/* test if rx crypto can be enabled and then write back initial value*/
+	reg_i = IXGBE_READ_REG(hw, IXGBE_SECRXCTRL);
+	IXGBE_WRITE_REG(hw, IXGBE_SECRXCTRL, 0);
+	reg = IXGBE_READ_REG(hw, IXGBE_SECRXCTRL);
+	if (reg != 0)
+		capable = 0;
+	IXGBE_WRITE_REG(hw, IXGBE_SECRXCTRL, reg_i);
+	return capable;
+}
+
+int
 ixgbe_crypto_enable_ipsec(struct rte_eth_dev *dev)
 {
 	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
diff --git a/drivers/net/ixgbe/ixgbe_ipsec.h b/drivers/net/ixgbe/ixgbe_ipsec.h
index acd9f3e..eeba39f 100644
--- a/drivers/net/ixgbe/ixgbe_ipsec.h
+++ b/drivers/net/ixgbe/ixgbe_ipsec.h
@@ -112,6 +112,7 @@ struct ixgbe_ipsec {
 
 struct rte_security_ctx *
 ixgbe_ipsec_ctx_create(struct rte_eth_dev *dev);
+int ixgbe_crypto_capable(struct rte_eth_dev *dev);
 int ixgbe_crypto_enable_ipsec(struct rte_eth_dev *dev);
 int ixgbe_crypto_add_ingress_sa_from_flow(const void *sess,
 					  const void *ip_spec,
-- 
2.7.5