IB/mlx5: Enable IPoIB acceleration

Enable mlx5 IPoIB acceleration by declaring
mlx5_ib_{alloc,free}_rdma_netdev and assigning the mlx5
IPoIB rdma_netdev callbacks.

In addition, this patch brings in sync mlx5's IPoIB parts for net and IB
trees. As a precaution, we disabled IPoIB acceleration by default (in
the mlx5_core Kconfig file).

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 9f3ba320ce70ee245ffcfb5242037cd1560f6e9f..d45772da09635c2164f4cef8bcf5255c17fe8cff 100644 (file)
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -3530,6 +3530,26 @@ static int mlx5_ib_get_hw_stats(struct ib_device *ibdev,
        return num_counters;
 }
 
+static struct net_device*
+mlx5_ib_alloc_rdma_netdev(struct ib_device *hca,
+                         u8 port_num,
+                         enum rdma_netdev_t type,
+                         const char *name,
+                         unsigned char name_assign_type,
+                         void (*setup)(struct net_device *))
+{
+       if (type != RDMA_NETDEV_IPOIB)
+               return ERR_PTR(-EOPNOTSUPP);
+
+       return mlx5_rdma_netdev_alloc(to_mdev(hca)->mdev, hca,
+                                     name, setup);
+}
+
+static void mlx5_ib_free_rdma_netdev(struct net_device *netdev)
+{
+       return mlx5_rdma_netdev_free(netdev);
+}
+
 static void *mlx5_ib_add(struct mlx5_core_dev *mdev)
 {
        struct mlx5_ib_dev *dev;
@@ -3660,6 +3680,8 @@ static void *mlx5_ib_add(struct mlx5_core_dev *mdev)
        dev->ib_dev.check_mr_status     = mlx5_ib_check_mr_status;
        dev->ib_dev.get_port_immutable  = mlx5_port_immutable;
        dev->ib_dev.get_dev_fw_str      = get_dev_fw_str;
+       dev->ib_dev.alloc_rdma_netdev   = mlx5_ib_alloc_rdma_netdev;
+       dev->ib_dev.free_rdma_netdev    = mlx5_ib_free_rdma_netdev;
        if (mlx5_core_is_pf(mdev)) {
                dev->ib_dev.get_vf_config       = mlx5_ib_get_vf_config;
                dev->ib_dev.set_vf_link_state   = mlx5_ib_set_vf_link_state;

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/Kconfig b/drivers/net/ethernet/mellanox/mlx5/core/Kconfig
index a84b652f9b5401eb7655eb8f9b568d5fb72d06c8..fc52d742b7f7a52885bc78cfcb23acbd738bc552 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/Kconfig
+++ b/drivers/net/ethernet/mellanox/mlx5/core/Kconfig
@@ -35,6 +35,6 @@ config MLX5_CORE_EN_DCB
 config MLX5_CORE_IPOIB
        bool "Mellanox Technologies ConnectX-4 IPoIB offloads support"
        depends on MLX5_CORE_EN
-       default y
+       default n
        ---help---
          MLX5 IPoIB offloads & acceleration support.

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/ipoib.c b/drivers/net/ethernet/mellanox/mlx5/core/ipoib.c
index 3c84e36af0186bea101736500cf0b20bca57ba6a..019c230da498f4d540cfb253a5c5f06edffeee05 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/ipoib.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/ipoib.c
@@ -30,6 +30,7 @@
  * SOFTWARE.
  */
 
+#include <rdma/ib_verbs.h>
 #include <linux/mlx5/fs.h>
 #include "en.h"
 #include "ipoib.h"
@@ -359,10 +360,10 @@ unlock:
        return 0;
 }
 
-#ifdef notusedyet
 /* IPoIB RDMA netdev callbacks */
 static int mlx5i_attach_mcast(struct net_device *netdev, struct ib_device *hca,
-                             union ib_gid *gid, u16 lid, int set_qkey)
+                             union ib_gid *gid, u16 lid, int set_qkey,
+                             u32 qkey)
 {
        struct mlx5e_priv    *epriv = mlx5i_epriv(netdev);
        struct mlx5_core_dev *mdev  = epriv->mdev;
@@ -375,6 +376,12 @@ static int mlx5i_attach_mcast(struct net_device *netdev, struct ib_device *hca,
                mlx5_core_warn(mdev, "failed attaching QPN 0x%x, MGID %pI6\n",
                               ipriv->qp.qpn, gid->raw);
 
+       if (set_qkey) {
+               mlx5_core_dbg(mdev, "%s setting qkey 0x%x\n",
+                             netdev->name, qkey);
+               ipriv->qkey = qkey;
+       }
+
        return err;
 }
 
@@ -397,15 +404,15 @@ static int mlx5i_detach_mcast(struct net_device *netdev, struct ib_device *hca,
 }
 
 static int mlx5i_xmit(struct net_device *dev, struct sk_buff *skb,
-              struct ib_ah *address, u32 dqpn, u32 dqkey)
+                     struct ib_ah *address, u32 dqpn)
 {
        struct mlx5e_priv *epriv = mlx5i_epriv(dev);
        struct mlx5e_txqsq *sq   = epriv->txq2sq[skb_get_queue_mapping(skb)];
        struct mlx5_ib_ah *mah   = to_mah(address);
+       struct mlx5i_priv *ipriv = epriv->ppriv;
 
-       return mlx5i_sq_xmit(sq, skb, &mah->av, dqpn, dqkey);
+       return mlx5i_sq_xmit(sq, skb, &mah->av, dqpn, ipriv->qkey);
 }
-#endif
 
 static int mlx5i_check_required_hca_cap(struct mlx5_core_dev *mdev)
 {
@@ -414,22 +421,23 @@ static int mlx5i_check_required_hca_cap(struct mlx5_core_dev *mdev)
 
        if (!MLX5_CAP_GEN(mdev, ipoib_enhanced_offloads)) {
                mlx5_core_warn(mdev, "IPoIB enhanced offloads are not supported\n");
-               return -ENOTSUPP;
+               return -EOPNOTSUPP;
        }
 
        return 0;
 }
 
-static struct net_device *mlx5_rdma_netdev_alloc(struct mlx5_core_dev *mdev,
-                                                struct ib_device *ibdev,
-                                                const char *name,
-                                                void (*setup)(struct net_device *))
+struct net_device *mlx5_rdma_netdev_alloc(struct mlx5_core_dev *mdev,
+                                         struct ib_device *ibdev,
+                                         const char *name,
+                                         void (*setup)(struct net_device *))
 {
        const struct mlx5e_profile *profile = &mlx5i_nic_profile;
        int nch = profile->max_nch(mdev);
        struct net_device *netdev;
        struct mlx5i_priv *ipriv;
        struct mlx5e_priv *epriv;
+       struct rdma_netdev *rn;
        int err;
 
        if (mlx5i_check_required_hca_cap(mdev)) {
@@ -464,13 +472,13 @@ static struct net_device *mlx5_rdma_netdev_alloc(struct mlx5_core_dev *mdev,
        mlx5e_attach_netdev(epriv);
        netif_carrier_off(netdev);
 
-       /* TODO: set rdma_netdev func pointers
-        * rn = &ipriv->rn;
-        * rn->hca  = ibdev;
-        * rn->send = mlx5i_xmit;
-        * rn->attach_mcast = mlx5i_attach_mcast;
-        * rn->detach_mcast = mlx5i_detach_mcast;
-        */
+       /* set rdma_netdev func pointers */
+       rn = &ipriv->rn;
+       rn->hca  = ibdev;
+       rn->send = mlx5i_xmit;
+       rn->attach_mcast = mlx5i_attach_mcast;
+       rn->detach_mcast = mlx5i_detach_mcast;
+
        return netdev;
 
 err_free_netdev:
@@ -482,7 +490,7 @@ free_mdev_resources:
 }
 EXPORT_SYMBOL(mlx5_rdma_netdev_alloc);
 
-static void mlx5_rdma_netdev_free(struct net_device *netdev)
+void mlx5_rdma_netdev_free(struct net_device *netdev)
 {
        struct mlx5e_priv          *priv    = mlx5i_epriv(netdev);
        const struct mlx5e_profile *profile = priv->profile;

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/ipoib.h b/drivers/net/ethernet/mellanox/mlx5/core/ipoib.h
index bae0a5cbc8ad396c846c27848f717ebc6d68a613..213191a7846479d768804a010a686f6501c268a3 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/ipoib.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/ipoib.h
@@ -40,7 +40,9 @@
 
 /* ipoib rdma netdev's private data structure */
 struct mlx5i_priv {
+       struct rdma_netdev rn; /* keep this first */
        struct mlx5_core_qp qp;
+       u32    qkey;
        char  *mlx5e_priv[0];
 };
 

diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index 3fece51dcf136f7694d1202b95a0f90914b938df..cef2b98d479f64e96972c69ea4312d789c4e39f5 100644 (file)
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -1102,6 +1102,25 @@ struct net_device *mlx5_lag_get_roce_netdev(struct mlx5_core_dev *dev);
 struct mlx5_uars_page *mlx5_get_uars_page(struct mlx5_core_dev *mdev);
 void mlx5_put_uars_page(struct mlx5_core_dev *mdev, struct mlx5_uars_page *up);
 
+#ifndef CONFIG_MLX5_CORE_IPOIB
+static inline
+struct net_device *mlx5_rdma_netdev_alloc(struct mlx5_core_dev *mdev,
+                                         struct ib_device *ibdev,
+                                         const char *name,
+                                         void (*setup)(struct net_device *))
+{
+       return ERR_PTR(-EOPNOTSUPP);
+}
+
+static inline void mlx5_rdma_netdev_free(struct net_device *netdev) {}
+#else
+struct net_device *mlx5_rdma_netdev_alloc(struct mlx5_core_dev *mdev,
+                                         struct ib_device *ibdev,
+                                         const char *name,
+                                         void (*setup)(struct net_device *));
+void mlx5_rdma_netdev_free(struct net_device *netdev);
+#endif /* CONFIG_MLX5_CORE_IPOIB */
+
 struct mlx5_profile {
        u64     mask;
        u8      log_max_qp;