From: Yishai Hadas <yishaih@xxxxxxxxxxxx>
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: Yishai Hadas <yishaih@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
---
drivers/infiniband/hw/mlx5/main.c | 31 +++++++++++++++++++++++++++++++
drivers/infiniband/hw/mlx5/user.h | 7 +++++++
2 files changed, 38 insertions(+)
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index f02a975..36706f7 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -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);
diff --git a/drivers/infiniband/hw/mlx5/user.h b/drivers/infiniband/hw/mlx5/user.h
index 188dac4..0e49d5b 100644
--- a/drivers/infiniband/hw/mlx5/user.h
+++ b/drivers/infiniband/hw/mlx5/user.h
@@ -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 {
--
2.7.4
--
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