[PATCH 2/2] net/mlx5: add support for set and get MTU in Windows

[Adham Masarwah <adham@nvidia.com>]

Mlx5Devx library has new API's for setting and getting MTU.
Added new glue functions that wrap the new mlx5devx lib API's.
Implemented the os_ethdev callbacks to use the new glue
functions in Windows.

Signed-off-by: Adham Masarwah <adham@nvidia.com>
Tested-by: Idan Hackmon <idanhac@nvidia.com>
Acked-by: Matan Azard <matan@nvidia.com>
---
 drivers/common/mlx5/windows/mlx5_glue.c   | 55 +++++++++++++++++++++++++++++++
 drivers/common/mlx5/windows/mlx5_glue.h   |  2 ++
 drivers/net/mlx5/windows/mlx5_ethdev_os.c | 31 ++++++++++++++---
 3 files changed, 84 insertions(+), 4 deletions(-)

diff --git a/drivers/common/mlx5/windows/mlx5_glue.c b/drivers/common/mlx5/windows/mlx5_glue.c
index 73d63ffd98..6935811bf4 100644
--- a/drivers/common/mlx5/windows/mlx5_glue.c
+++ b/drivers/common/mlx5/windows/mlx5_glue.c
@@ -358,6 +358,59 @@ mlx5_glue_devx_set_promisc_vport(void *ctx, uint32_t promisc_type, uint8_t f_ena
 #endif
 }
 
+static int
+mlx5_glue_devx_get_mtu(void *ctx, uint32_t *mtu)
+{
+	int err = 0;
+	struct mlx5_context *mlx5_ctx;
+
+	if (!ctx) {
+		errno = EINVAL;
+		return errno;
+	}
+	mlx5_ctx = (struct mlx5_context *)ctx;
+#ifdef HAVE_DEVX_SET_GET_MTU_SUPPORT
+	err = devx_get_mtu(mlx5_ctx->devx_ctx, mtu);
+	if (err) {
+		errno = err;
+		return errno;
+	}
+#else
+	*mtu = mlx5_ctx->mlx5_dev.mtu_bytes;
+#endif
+
+	return err;
+}
+
+static int
+mlx5_glue_devx_set_mtu(void *ctx, uint32_t mtu)
+{
+#ifdef HAVE_DEVX_SET_GET_MTU_SUPPORT
+	struct mlx5_context *mlx5_ctx;
+	int err;
+
+	if (!ctx) {
+		errno = EINVAL;
+		return errno;
+	}
+	mlx5_ctx = (struct mlx5_context *)ctx;
+	err = devx_set_mtu(mlx5_ctx->devx_ctx, mtu);
+	if (err) {
+		errno = err;
+		return errno;
+	}
+	return 0;
+#else
+		(void)mtu;
+		(void)ctx;
+		DRV_LOG(WARNING, "%s: is not supported", __func__);
+		return -ENOTSUP;
+#endif
+
+}
+
+
+
 alignas(RTE_CACHE_LINE_SIZE)
 const struct mlx5_glue *mlx5_glue = &(const struct mlx5_glue){
 	.version = MLX5_GLUE_VERSION,
@@ -382,4 +435,6 @@ const struct mlx5_glue *mlx5_glue = &(const struct mlx5_glue){
 	.query_rt_values = mlx5_glue_query_rt_values,
 	.devx_init_showdown_event = mlx5_glue_devx_init_showdown_event,
 	.devx_set_promisc_vport = mlx5_glue_devx_set_promisc_vport,
+	.devx_get_mtu = mlx5_glue_devx_get_mtu,
+	.devx_set_mtu = mlx5_glue_devx_set_mtu,
 };
diff --git a/drivers/common/mlx5/windows/mlx5_glue.h b/drivers/common/mlx5/windows/mlx5_glue.h
index eae8070b3f..5ba324ebc4 100644
--- a/drivers/common/mlx5/windows/mlx5_glue.h
+++ b/drivers/common/mlx5/windows/mlx5_glue.h
@@ -93,6 +93,8 @@ struct mlx5_glue {
 	int (*query_rt_values)(void *ctx, void *devx_clock);
 	int (*devx_init_showdown_event)(void *ctx);
 	int (*devx_set_promisc_vport)(void *ctx, uint32_t promisc_type, uint8_t f_enable);
+	int (*devx_get_mtu)(void *ctx, uint32_t *mtu);
+	int (*devx_set_mtu)(void *ctx, uint32_t mtu);
 };
 
 extern const struct mlx5_glue *mlx5_glue;
diff --git a/drivers/net/mlx5/windows/mlx5_ethdev_os.c b/drivers/net/mlx5/windows/mlx5_ethdev_os.c
index c6315ce368..f97526580d 100644
--- a/drivers/net/mlx5/windows/mlx5_ethdev_os.c
+++ b/drivers/net/mlx5/windows/mlx5_ethdev_os.c
@@ -85,6 +85,8 @@ mlx5_get_ifname(const struct rte_eth_dev *dev, char (*ifname)[MLX5_NAMESIZE])
 int
 mlx5_get_mtu(struct rte_eth_dev *dev, uint16_t *mtu)
 {
+	int err;
+	uint32_t curr_mtu;
 	struct mlx5_priv *priv;
 	mlx5_context_st *context_obj;
 
@@ -94,7 +96,14 @@ mlx5_get_mtu(struct rte_eth_dev *dev, uint16_t *mtu)
 	}
 	priv = dev->data->dev_private;
 	context_obj = (mlx5_context_st *)priv->sh->cdev->ctx;
-	*mtu = context_obj->mlx5_dev.mtu_bytes;
+
+	err = mlx5_glue->devx_get_mtu(context_obj, &curr_mtu);
+	if (err != 0) {
+		DRV_LOG(WARNING, "Could not get the MTU!");
+		return err;
+	}
+	*mtu = (uint16_t)curr_mtu;
+
 	return 0;
 }
 
@@ -112,9 +121,23 @@ mlx5_get_mtu(struct rte_eth_dev *dev, uint16_t *mtu)
 int
 mlx5_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
 {
-	RTE_SET_USED(dev);
-	RTE_SET_USED(mtu);
-	return -ENOTSUP;
+	int err;
+	struct mlx5_priv *priv;
+	mlx5_context_st *context_obj;
+
+	if (!dev) {
+		rte_errno = EINVAL;
+		return -rte_errno;
+	}
+	priv = dev->data->dev_private;
+	context_obj = (mlx5_context_st *)priv->sh->cdev->ctx;
+
+	err = mlx5_glue->devx_set_mtu(context_obj, mtu);
+	if (err != 0) {
+		DRV_LOG(WARNING, "Could not set the MTU!");
+		return err;
+	}
+	return 0;
 }
 
 /*
-- 
2.16.1.windows.4