[dpdk-dev] [PATCH 3/3] net/sfc: prepare to support Rx datapath without checksum

[Andrew Rybchenko]

Signed-off-by: Andrew Rybchenko <arybchenko at solarflare.com>
Reviewed-by: Ivan Malov <ivan.malov at oktetlabs.ru>
---
 drivers/net/sfc/sfc_dp_rx.h        |  1 +
 drivers/net/sfc/sfc_ef10_essb_rx.c |  3 ++-
 drivers/net/sfc/sfc_ef10_rx.c      |  3 ++-
 drivers/net/sfc/sfc_rx.c           | 19 ++++++++++++++-----
 4 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/drivers/net/sfc/sfc_dp_rx.h b/drivers/net/sfc/sfc_dp_rx.h
index 83faad160..ce96e83f6 100644
--- a/drivers/net/sfc/sfc_dp_rx.h
+++ b/drivers/net/sfc/sfc_dp_rx.h
@@ -195,6 +195,7 @@ struct sfc_dp_rx {
 #define SFC_DP_RX_FEAT_TUNNELS			0x4
 #define SFC_DP_RX_FEAT_FLOW_FLAG		0x8
 #define SFC_DP_RX_FEAT_FLOW_MARK		0x10
+#define SFC_DP_RX_FEAT_CHECKSUM			0x20
 	sfc_dp_rx_get_dev_info_t		*get_dev_info;
 	sfc_dp_rx_pool_ops_supported_t		*pool_ops_supported;
 	sfc_dp_rx_qsize_up_rings_t		*qsize_up_rings;
diff --git a/drivers/net/sfc/sfc_ef10_essb_rx.c b/drivers/net/sfc/sfc_ef10_essb_rx.c
index 3e0c7fd94..81c8f7fbd 100644
--- a/drivers/net/sfc/sfc_ef10_essb_rx.c
+++ b/drivers/net/sfc/sfc_ef10_essb_rx.c
@@ -705,7 +705,8 @@ struct sfc_dp_rx sfc_ef10_essb_rx = {
 				  SFC_DP_HW_FW_CAP_RX_ES_SUPER_BUFFER,
 	},
 	.features		= SFC_DP_RX_FEAT_FLOW_FLAG |
-				  SFC_DP_RX_FEAT_FLOW_MARK,
+				  SFC_DP_RX_FEAT_FLOW_MARK |
+				  SFC_DP_RX_FEAT_CHECKSUM,
 	.get_dev_info		= sfc_ef10_essb_rx_get_dev_info,
 	.pool_ops_supported	= sfc_ef10_essb_rx_pool_ops_supported,
 	.qsize_up_rings		= sfc_ef10_essb_rx_qsize_up_rings,
diff --git a/drivers/net/sfc/sfc_ef10_rx.c b/drivers/net/sfc/sfc_ef10_rx.c
index 42b35b9b2..6a5052b93 100644
--- a/drivers/net/sfc/sfc_ef10_rx.c
+++ b/drivers/net/sfc/sfc_ef10_rx.c
@@ -658,7 +658,8 @@ struct sfc_dp_rx sfc_ef10_rx = {
 		.hw_fw_caps	= SFC_DP_HW_FW_CAP_EF10,
 	},
 	.features		= SFC_DP_RX_FEAT_MULTI_PROCESS |
-				  SFC_DP_RX_FEAT_TUNNELS,
+				  SFC_DP_RX_FEAT_TUNNELS |
+				  SFC_DP_RX_FEAT_CHECKSUM,
 	.get_dev_info		= sfc_ef10_rx_get_dev_info,
 	.qsize_up_rings		= sfc_ef10_rx_qsize_up_rings,
 	.qcreate		= sfc_ef10_rx_qcreate,
diff --git a/drivers/net/sfc/sfc_rx.c b/drivers/net/sfc/sfc_rx.c
index 6ff922770..d8503e201 100644
--- a/drivers/net/sfc/sfc_rx.c
+++ b/drivers/net/sfc/sfc_rx.c
@@ -517,7 +517,8 @@ struct sfc_dp_rx sfc_efx_rx = {
 		.type		= SFC_DP_RX,
 		.hw_fw_caps	= 0,
 	},
-	.features		= SFC_DP_RX_FEAT_SCATTER,
+	.features		= SFC_DP_RX_FEAT_SCATTER |
+				  SFC_DP_RX_FEAT_CHECKSUM,
 	.qsize_up_rings		= sfc_efx_rx_qsize_up_rings,
 	.qcreate		= sfc_efx_rx_qcreate,
 	.qdestroy		= sfc_efx_rx_qdestroy,
@@ -792,9 +793,12 @@ sfc_rx_get_dev_offload_caps(struct sfc_adapter *sa)
 
 	caps |= DEV_RX_OFFLOAD_JUMBO_FRAME;
 	caps |= DEV_RX_OFFLOAD_CRC_STRIP;
-	caps |= DEV_RX_OFFLOAD_IPV4_CKSUM;
-	caps |= DEV_RX_OFFLOAD_UDP_CKSUM;
-	caps |= DEV_RX_OFFLOAD_TCP_CKSUM;
+
+	if (sa->dp_rx->features & SFC_DP_RX_FEAT_CHECKSUM) {
+		caps |= DEV_RX_OFFLOAD_IPV4_CKSUM;
+		caps |= DEV_RX_OFFLOAD_UDP_CKSUM;
+		caps |= DEV_RX_OFFLOAD_TCP_CKSUM;
+	}
 
 	if (encp->enc_tunnel_encapsulations_supported &&
 	    (sa->dp_rx->features & SFC_DP_RX_FEAT_TUNNELS))
@@ -1443,8 +1447,13 @@ sfc_rx_check_mode(struct sfc_adapter *sa, struct rte_eth_rxmode *rxmode)
 		rxmode->offloads |= DEV_RX_OFFLOAD_CRC_STRIP;
 	}
 
+	/*
+	 * Requested offloads are validated against supported by ethdev,
+	 * so unsupported offloads cannot be added as the result of
+	 * below check.
+	 */
 	if ((rxmode->offloads & DEV_RX_OFFLOAD_CHECKSUM) !=
-	    DEV_RX_OFFLOAD_CHECKSUM) {
+	    (offloads_supported & DEV_RX_OFFLOAD_CHECKSUM)) {
 		sfc_warn(sa, "Rx checksum offloads cannot be disabled - always on (IPv4/TCP/UDP)");
 		rxmode->offloads |= DEV_RX_OFFLOAD_CHECKSUM;
 	}
-- 
2.17.1