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Commit 31f69a82 authored by Yishai Hadas's avatar Yishai Hadas Committed by Doug Ledford
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IB/mlx5: Expose RSS related capabilities 



Expose RSS related capabilities on both IB and vendor channels.

In addition to the IB capabilities the driver reports some extra
capabilities on its vendor channel:
- Bit mask of the supported types of hash functions.
- Bit mask of the supported RX fields that can participate
  in the RX hashing.

Those capabilities are applicable only when the link layer
is Ethernet.

Signed-off-by: default avatarYishai Hadas <yishaih@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 47adf2f4

drivers/infiniband/hw/mlx5/main.c

+31 −0
Original line number Diff line number Diff line
@@ -531,6 +531,26 @@ static int mlx5_ib_query_device(struct ib_device *ibdev, 
				resp.response_length += sizeof(resp.tso_caps);

			}

		}



		if (field_avail(typeof(resp), rss_caps, uhw->outlen)) {

			resp.rss_caps.rx_hash_function =

						MLX5_RX_HASH_FUNC_TOEPLITZ;

			resp.rss_caps.rx_hash_fields_mask =

						MLX5_RX_HASH_SRC_IPV4 |

						MLX5_RX_HASH_DST_IPV4 |

						MLX5_RX_HASH_SRC_IPV6 |

						MLX5_RX_HASH_DST_IPV6 |

						MLX5_RX_HASH_SRC_PORT_TCP |

						MLX5_RX_HASH_DST_PORT_TCP |

						MLX5_RX_HASH_SRC_PORT_UDP |

						MLX5_RX_HASH_DST_PORT_UDP;

			resp.response_length += sizeof(resp.rss_caps);

		}

	} else {

		if (field_avail(typeof(resp), tso_caps, uhw->outlen))

			resp.response_length += sizeof(resp.tso_caps);

		if (field_avail(typeof(resp), rss_caps, uhw->outlen))

			resp.response_length += sizeof(resp.rss_caps);

	}



	if (MLX5_CAP_GEN(mdev, ipoib_basic_offloads)) {
@@ -594,6 +614,17 @@ static int mlx5_ib_query_device(struct ib_device *ibdev, 
	if (!mlx5_core_is_pf(mdev))

		props->device_cap_flags |= IB_DEVICE_VIRTUAL_FUNCTION;



	if (mlx5_ib_port_link_layer(ibdev, 1) ==

	    IB_LINK_LAYER_ETHERNET) {

		props->rss_caps.max_rwq_indirection_tables =

			1 << MLX5_CAP_GEN(dev->mdev, log_max_rqt);

		props->rss_caps.max_rwq_indirection_table_size =

			1 << MLX5_CAP_GEN(dev->mdev, log_max_rqt_size);

		props->rss_caps.supported_qpts = 1 << IB_QPT_RAW_PACKET;

		props->max_wq_type_rq =

			1 << MLX5_CAP_GEN(dev->mdev, log_max_rq);

	}



	if (uhw->outlen) {

		err = ib_copy_to_udata(uhw, &resp, resp.response_length);

drivers/infiniband/hw/mlx5/user.h

+7 −0
Original line number Diff line number Diff line
@@ -121,10 +121,17 @@ struct mlx5_ib_tso_caps { 
	__u32 supported_qpts;

};



struct mlx5_ib_rss_caps {

	__u64 rx_hash_fields_mask; /* enum mlx5_rx_hash_fields */

	__u8 rx_hash_function; /* enum mlx5_rx_hash_function_flags */

	__u8 reserved[7];

};



struct mlx5_ib_query_device_resp {

	__u32	comp_mask;

	__u32	response_length;

	struct	mlx5_ib_tso_caps tso_caps;

	struct	mlx5_ib_rss_caps rss_caps;

};



struct mlx5_ib_create_cq {