[PATCH v2] ethdev: check Rx/Tx offloads

[Wei Dai <wei.dai@intel.com>]

This patch check if a requested offloading
is supported in the device capability.
A per port offloading feature should be enabled or
disabled at same time in both rte_eth_dev_configure( )
and rte_eth_rx_queue_setup( )/rte_eth_tx_queue_setup( ).
This patch check if a per port offloading flag has
same configuration in rte_eth_dev_configure( ) and
rte_eth_rx_queue_setup( )/rte_eth_tx_queue_setup( ).
This patch can make such checking in a common way in
rte_ethdev layer to avoid same checking in underlying PMD.

Signed-off-by: Wei Dai <wei.dai@intel.com>

---
v2: add offlaods checking in rte_eth_dev_configure( ).
    check if a requested offloading is supported
---
 lib/librte_ether/rte_ethdev.c | 100 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)

diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index 0590f0c..a04a705 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -1152,6 +1152,27 @@ rte_eth_dev_configure(uint16_t port_id, uint16_t nb_rx_q, uint16_t nb_tx_q,
 							ETHER_MAX_LEN;
 	}
 
+	if ((local_conf.rxmode.offloads & dev_info.rx_offload_capa) !=
+	     local_conf.rxmode.offloads) {
+		RTE_PMD_DEBUG_TRACE("ethdev port_id=%d requested Rx offloads "
+				    "0x%" PRIx64 " doesn't match Rx offloads "
+				    "capability 0x%" PRIx64 "\n",
+				    port_id,
+				    local_conf.rxmode.offloads,
+				    dev_info.rx_offload_capa);
+		return -EINVAL;
+	}
+	if ((local_conf.txmode.offloads & dev_info.tx_offload_capa) !=
+	     local_conf.txmode.offloads) {
+		RTE_PMD_DEBUG_TRACE("ethdev port_id=%d requested Tx offloads "
+				    "0x%" PRIx64 " doesn't match Tx offloads "
+				    "capability 0x%" PRIx64 "\n",
+				    port_id,
+				    local_conf.txmode.offloads,
+				    dev_info.tx_offload_capa);
+		return -EINVAL;
+	}
+
 	/*
 	 * Setup new number of RX/TX queues and reconfigure device.
 	 */
@@ -1404,6 +1425,50 @@ rte_eth_dev_is_removed(uint16_t port_id)
 	return ret;
 }
 
+/**
+* Check if the Rx/Tx queue offloading settings is valid
+* @param queue_offloads
+*   offloads input to rte_eth_rx_queue_setup( ) or rte_eth_tx_queue_setup( )
+* @param port_offloads
+*   Rx or Tx offloads input to rte_eth_dev_configure( )
+* @param queue_offload_capa
+*   rx_queue_offload_capa or tx_queue_offload_capa in struct rte_eth_dev_ifnfo
+*   got from rte_eth_dev_info_get( )
+* @param all_offload_capa
+*   rx_offload_capa or tx_offload_capa in struct rte_eth_dev_info
+*   got from rte_eth_dev_info_get( )
+*
+* @return
+*   Nonzero when per-queue offloading setting is valid
+*/
+static int
+rte_eth_check_queue_offloads(uint64_t queue_offloads,
+			     uint64_t port_offloads,
+			     uint64_t queue_offload_capa,
+			     uint64_t all_offload_capa)
+{
+	uint64_t pure_port_capa = all_offload_capa ^ queue_offload_capa;
+
+	if ((queue_offloads & all_offload_capa) != queue_offloads)
+		return 0;
+
+	if ((port_offloads ^ queue_offloads) & pure_port_capa)
+		return 0;
+
+	return 1;
+}
+
+static int
+rte_eth_check_rx_queue_offloads(uint64_t rx_queue_offloads,
+				const struct rte_eth_rxmode *rxmode,
+				const struct rte_eth_dev_info *dev_info)
+{
+	return rte_eth_check_queue_offloads(rx_queue_offloads,
+					    rxmode->offloads,
+					    dev_info->rx_queue_offload_capa,
+					    dev_info->rx_offload_capa);
+}
+
 int
 rte_eth_rx_queue_setup(uint16_t port_id, uint16_t rx_queue_id,
 		       uint16_t nb_rx_desc, unsigned int socket_id,
@@ -1495,6 +1560,18 @@ rte_eth_rx_queue_setup(uint16_t port_id, uint16_t rx_queue_id,
 						    &local_conf.offloads);
 	}
 
+	if (!rte_eth_check_rx_queue_offloads(local_conf.offloads,
+		&dev->data->dev_conf.rxmode, &dev_info)) {
+		RTE_PMD_DEBUG_TRACE("Ethdev port %d : Rx queue offloads ox%"
+			PRIx64 " don't match port offloads 0x%" PRIx64
+			" or supported offloads 0x%" PRIx64 "\n",
+			port_id,
+			local_conf.offloads,
+			dev->data->dev_conf.rxmode.offloads,
+			dev_info.rx_offload_capa);
+		return -ENOTSUP;
+	}
+
 	ret = (*dev->dev_ops->rx_queue_setup)(dev, rx_queue_id, nb_rx_desc,
 					      socket_id, &local_conf, mp);
 	if (!ret) {
@@ -1555,6 +1632,17 @@ rte_eth_convert_txq_offloads(const uint64_t tx_offloads, uint32_t *txq_flags)
 	*txq_flags = flags;
 }
 
+static int
+rte_eth_check_tx_queue_offloads(uint64_t tx_queue_offloads,
+				const struct rte_eth_txmode *txmode,
+				const struct rte_eth_dev_info *dev_info)
+{
+	return rte_eth_check_queue_offloads(tx_queue_offloads,
+					    txmode->offloads,
+					    dev_info->tx_queue_offload_capa,
+					    dev_info->tx_offload_capa);
+}
+
 int
 rte_eth_tx_queue_setup(uint16_t port_id, uint16_t tx_queue_id,
 		       uint16_t nb_tx_desc, unsigned int socket_id,
@@ -1622,6 +1710,18 @@ rte_eth_tx_queue_setup(uint16_t port_id, uint16_t tx_queue_id,
 					  &local_conf.offloads);
 	}
 
+	if (!rte_eth_check_tx_queue_offloads(local_conf.offloads,
+		&dev->data->dev_conf.txmode, &dev_info)) {
+		RTE_PMD_DEBUG_TRACE("Ethdev port %d : Tx queue offloads ox%"
+			PRIx64 " don't match port offloads 0x%" PRIx64
+			" or supported offloads 0x%" PRIx64 "\n",
+			port_id,
+			local_conf.offloads,
+			dev->data->dev_conf.txmode.offloads,
+			dev_info.tx_offload_capa);
+		return -ENOTSUP;
+	}
+
 	return eth_err(port_id, (*dev->dev_ops->tx_queue_setup)(dev,
 		       tx_queue_id, nb_tx_desc, socket_id, &local_conf));
 }
-- 
2.9.5