[dpdk-dev] [PATCH 02/28] net/mlx5: add LRO APIs and initial settings

[Matan Azrad]

From: Dekel Peled <dekelp at mellanox.com>

Add command-line argument to set LRO session timeout.
Add LRO settings struct in PMD configuration struct.
Add support of LRO offload in port configuration.
Add macros and function to check if LRO is supported and enabled.

Signed-off-by: Dekel Peled <dekelp at mellanox.com>
Acked-by: Matan Azrad <matan at mellanox.com>
---
 drivers/net/mlx5/mlx5.c        |  6 ++++++
 drivers/net/mlx5/mlx5.h        | 16 ++++++++++++++++
 drivers/net/mlx5/mlx5_ethdev.c |  2 +-
 drivers/net/mlx5/mlx5_rxq.c    | 22 +++++++++++++++++++++-
 drivers/net/mlx5/mlx5_rxtx.h   |  3 ++-
 5 files changed, 46 insertions(+), 3 deletions(-)

diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index 37d3c08..5bef431 100644
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -138,6 +138,9 @@
 /* Device parameter to configure the maximum number of dump files per queue. */
 #define MLX5_MAX_DUMP_FILES_NUM "max_dump_files_num"
 
+/* Configure timeout of LRO session (in microseconds). */
+#define MLX5_LRO_TIMEOUT_USEC "lro_timeout_usec"
+
 #ifndef HAVE_IBV_MLX5_MOD_MPW
 #define MLX5DV_CONTEXT_FLAGS_MPW_ALLOWED (1 << 2)
 #define MLX5DV_CONTEXT_FLAGS_ENHANCED_MPW (1 << 3)
@@ -1052,6 +1055,8 @@ struct mlx5_dev_spawn_data {
 		config->mr_ext_memseg_en = !!tmp;
 	} else if (strcmp(MLX5_MAX_DUMP_FILES_NUM, key) == 0) {
 		config->max_dump_files_num = tmp;
+	} else if (strcmp(MLX5_LRO_TIMEOUT_USEC, key) == 0) {
+		config->lro.timeout = tmp;
 	} else {
 		DRV_LOG(WARNING, "%s: unknown parameter", key);
 		rte_errno = EINVAL;
@@ -1100,6 +1105,7 @@ struct mlx5_dev_spawn_data {
 		MLX5_MR_EXT_MEMSEG_EN,
 		MLX5_REPRESENTOR,
 		MLX5_MAX_DUMP_FILES_NUM,
+		MLX5_LRO_TIMEOUT_USEC,
 		NULL,
 	};
 	struct rte_kvargs *kvlist;
diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
index 7aad94d..4074a7e 100644
--- a/drivers/net/mlx5/mlx5.h
+++ b/drivers/net/mlx5/mlx5.h
@@ -183,6 +183,21 @@ struct mlx5_hca_attr {
 /* Default PMD specific parameter value. */
 #define MLX5_ARG_UNSET (-1)
 
+#define MLX5_LRO_SUPPORTED(dev) \
+	(((struct mlx5_priv *)((dev)->data->dev_private))->config.lro.supported)
+
+#define MLX5_LRO_ENABLED(dev) \
+	((dev)->data->dev_conf.rxmode.offloads & DEV_RX_OFFLOAD_TCP_LRO)
+
+#define MLX5_FLOW_IPV4_LRO	(1 << 0)
+#define MLX5_FLOW_IPV6_LRO	(1 << 1)
+
+/* LRO configurations structure. */
+struct mlx5_lro_config {
+	uint32_t supported:1; /* Whether LRO is supported. */
+	uint32_t timeout; /* User configuration. */
+};
+
 /*
  * Device configuration structure.
  *
@@ -233,6 +248,7 @@ struct mlx5_dev_config {
 	int txq_inline_max; /* Max packet size for inlining with SEND. */
 	int txq_inline_mpw; /* Max packet size for inlining with eMPW. */
 	struct mlx5_hca_attr hca_attr; /* HCA attributes. */
+	struct mlx5_lro_config lro; /* LRO configuration. */
 };
 
 /**
diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index 6c9bcf1..1125e16 100644
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -659,7 +659,7 @@ struct ethtool_link_settings {
 	info->max_tx_queues = max;
 	info->max_mac_addrs = MLX5_MAX_UC_MAC_ADDRESSES;
 	info->rx_queue_offload_capa = mlx5_get_rx_queue_offloads(dev);
-	info->rx_offload_capa = (mlx5_get_rx_port_offloads() |
+	info->rx_offload_capa = (mlx5_get_rx_port_offloads(dev) |
 				 info->rx_queue_offload_capa);
 	info->tx_offload_capa = mlx5_get_tx_port_offloads(dev);
 	if (mlx5_get_ifname(dev, &ifname) == 0)
diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c
index 0535ce3..e68de50 100644
--- a/drivers/net/mlx5/mlx5_rxq.c
+++ b/drivers/net/mlx5/mlx5_rxq.c
@@ -124,6 +124,21 @@
 }
 
 /**
+ * Check whether LRO is supported and enabled for the device.
+ *
+ * @param dev
+ *   Pointer to Ethernet device.
+ *
+ * @return
+ *   0 if disabled, 1 if enabled.
+ */
+inline int
+mlx5_lro_on(struct rte_eth_dev *dev)
+{
+	return (MLX5_LRO_SUPPORTED(dev) && MLX5_LRO_ENABLED(dev));
+}
+
+/**
  * Allocate RX queue elements for Multi-Packet RQ.
  *
  * @param rxq_ctrl
@@ -386,14 +401,19 @@
 /**
  * Returns the per-port supported offloads.
  *
+ * @param dev
+ *   Pointer to Ethernet device.
+ *
  * @return
  *   Supported Rx offloads.
  */
 uint64_t
-mlx5_get_rx_port_offloads(void)
+mlx5_get_rx_port_offloads(struct rte_eth_dev *dev)
 {
 	uint64_t offloads = DEV_RX_OFFLOAD_VLAN_FILTER;
 
+	if (MLX5_LRO_SUPPORTED(dev))
+		offloads |= DEV_RX_OFFLOAD_TCP_LRO;
 	return offloads;
 }
 
diff --git a/drivers/net/mlx5/mlx5_rxtx.h b/drivers/net/mlx5/mlx5_rxtx.h
index bc8a61a..2f688ac 100644
--- a/drivers/net/mlx5/mlx5_rxtx.h
+++ b/drivers/net/mlx5/mlx5_rxtx.h
@@ -323,8 +323,9 @@ struct mlx5_hrxq *mlx5_hrxq_get(struct rte_eth_dev *dev,
 int mlx5_hrxq_ibv_verify(struct rte_eth_dev *dev);
 struct mlx5_hrxq *mlx5_hrxq_drop_new(struct rte_eth_dev *dev);
 void mlx5_hrxq_drop_release(struct rte_eth_dev *dev);
-uint64_t mlx5_get_rx_port_offloads(void);
+uint64_t mlx5_get_rx_port_offloads(struct rte_eth_dev *dev);
 uint64_t mlx5_get_rx_queue_offloads(struct rte_eth_dev *dev);
+int mlx5_lro_on(struct rte_eth_dev *dev);
 
 /* mlx5_txq.c */
 
-- 
1.8.3.1