[dpdk-dev] [PATCH 45/56] net/sfc: check configured rxmode

[Andrew Rybchenko <arybchenko@solarflare.com>]

Reviewed-by: Andy Moreton <amoreton@solarflare.com>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
---
 doc/guides/nics/sfc_efx.rst  | 12 +++++++++
 drivers/net/sfc/efx/sfc_rx.c | 61 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 73 insertions(+)

diff --git a/doc/guides/nics/sfc_efx.rst b/doc/guides/nics/sfc_efx.rst
index 46c892b..87b217f8 100644
--- a/doc/guides/nics/sfc_efx.rst
+++ b/doc/guides/nics/sfc_efx.rst
@@ -60,6 +60,18 @@ The features not yet supported include:
 
 - Loopback
 
+- Configurable RX CRC stripping (always stripped)
+
+- Header split on receive
+
+- VLAN filtering
+
+- VLAN stripping
+
+- Scattered receive
+
+- LRO
+
 
 Supported NICs
 --------------
diff --git a/drivers/net/sfc/efx/sfc_rx.c b/drivers/net/sfc/efx/sfc_rx.c
index 961e6b6..bc43e4e 100644
--- a/drivers/net/sfc/efx/sfc_rx.c
+++ b/drivers/net/sfc/efx/sfc_rx.c
@@ -48,6 +48,61 @@ sfc_rx_qinit_info(struct sfc_adapter *sa, unsigned int sw_index)
 	return 0;
 }
 
+static int
+sfc_rx_check_mode(struct sfc_adapter *sa, struct rte_eth_rxmode *rxmode)
+{
+	int rc = 0;
+
+	switch (rxmode->mq_mode) {
+	case ETH_MQ_RX_NONE:
+		/* No special checks are required */
+		break;
+	default:
+		sfc_err(sa, "Rx multi-queue mode %u not supported",
+			rxmode->mq_mode);
+		rc = EINVAL;
+	}
+
+	if (rxmode->header_split) {
+		sfc_err(sa, "Header split on Rx not supported");
+		rc = EINVAL;
+	}
+
+	if (rxmode->hw_vlan_filter) {
+		sfc_err(sa, "HW VLAN filtering not supported");
+		rc = EINVAL;
+	}
+
+	if (rxmode->hw_vlan_strip) {
+		sfc_err(sa, "HW VLAN stripping not supported");
+		rc = EINVAL;
+	}
+
+	if (rxmode->hw_vlan_extend) {
+		sfc_err(sa,
+			"Q-in-Q HW VLAN stripping not supported");
+		rc = EINVAL;
+	}
+
+	if (!rxmode->hw_strip_crc) {
+		sfc_warn(sa,
+			 "FCS stripping control not supported - always stripped");
+		rxmode->hw_strip_crc = 1;
+	}
+
+	if (rxmode->enable_scatter) {
+		sfc_err(sa, "Scatter on Rx not supported");
+		rc = EINVAL;
+	}
+
+	if (rxmode->enable_lro) {
+		sfc_err(sa, "LRO not supported");
+		rc = EINVAL;
+	}
+
+	return rc;
+}
+
 /**
  * Initialize Rx subsystem.
  *
@@ -59,9 +114,14 @@ sfc_rx_qinit_info(struct sfc_adapter *sa, unsigned int sw_index)
 int
 sfc_rx_init(struct sfc_adapter *sa)
 {
+	struct rte_eth_conf *dev_conf = &sa->eth_dev->data->dev_conf;
 	unsigned int sw_index;
 	int rc;
 
+	rc = sfc_rx_check_mode(sa, &dev_conf->rxmode);
+	if (rc != 0)
+		goto fail_check_mode;
+
 	sa->rxq_count = sa->eth_dev->data->nb_rx_queues;
 
 	rc = ENOMEM;
@@ -85,6 +145,7 @@ sfc_rx_init(struct sfc_adapter *sa)
 
 fail_rxqs_alloc:
 	sa->rxq_count = 0;
+fail_check_mode:
 	sfc_log_init(sa, "failed %d", rc);
 	return rc;
 }
-- 
2.5.5