[dpdk-dev] [PATCH 05/13] net/sfc: Rx scatter is a datapath-dependent feature

[Andrew Rybchenko]

Signed-off-by: Andrew Rybchenko <arybchenko at solarflare.com>
---
 drivers/net/sfc/sfc_dp_rx.h | 2 ++
 drivers/net/sfc/sfc_rx.c    | 8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/drivers/net/sfc/sfc_dp_rx.h b/drivers/net/sfc/sfc_dp_rx.h
index 5a714a1..66d655f 100644
--- a/drivers/net/sfc/sfc_dp_rx.h
+++ b/drivers/net/sfc/sfc_dp_rx.h
@@ -150,6 +150,8 @@ typedef void (sfc_dp_rx_qstop_t)(struct sfc_dp_rxq *dp_rxq,
 struct sfc_dp_rx {
 	struct sfc_dp				dp;
 
+	unsigned int				features;
+#define SFC_DP_RX_FEAT_SCATTER			0x1
 	sfc_dp_rx_qcreate_t			*qcreate;
 	sfc_dp_rx_qdestroy_t			*qdestroy;
 	sfc_dp_rx_qstart_t			*qstart;
diff --git a/drivers/net/sfc/sfc_rx.c b/drivers/net/sfc/sfc_rx.c
index e56837d..0095afd 100644
--- a/drivers/net/sfc/sfc_rx.c
+++ b/drivers/net/sfc/sfc_rx.c
@@ -478,6 +478,7 @@ struct sfc_dp_rx sfc_efx_rx = {
 		.type		= SFC_DP_RX,
 		.hw_fw_caps	= 0,
 	},
+	.features		= SFC_DP_RX_FEAT_SCATTER,
 	.qcreate		= sfc_efx_rx_qcreate,
 	.qdestroy		= sfc_efx_rx_qdestroy,
 	.qstart			= sfc_efx_rx_qstart,
@@ -1149,6 +1150,13 @@ struct sfc_dp_rx sfc_efx_rx = {
 		rxmode->hw_strip_crc = 1;
 	}
 
+	if (rxmode->enable_scatter &&
+	    (~sa->dp_rx->features & SFC_DP_RX_FEAT_SCATTER)) {
+		sfc_err(sa, "Rx scatter not supported by %s datapath",
+			sa->dp_rx->dp.name);
+		rc = EINVAL;
+	}
+
 	if (rxmode->enable_lro) {
 		sfc_err(sa, "LRO not supported");
 		rc = EINVAL;
-- 
1.8.2.3