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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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837052d0cc
When the device tunneling offloads mode is vxlan do the following
- call SET_PORT with the relevant setting
- add DMFS steering vxlan rule for the device self and multicast mac addresses
of the form: {<ETH, outer-mac> <VXLAN, ANY vnid> <ETH, ANY mac>} --> RSS QP
- set relevant QPC fields in RSS context and RX ring QPs
- in TX flow, set WQE fields to generate HW checksum, and handle gso skbs
which are marked for encapsulation such that the HW will segment them properly.
- in RX flow, read HW offloaded checksum for encapsulated packets from the CQE
- advertize hw_enc_features and NETIF_F_GSO_UDP_TUNNEL to the networking stack
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
116 lines
3.6 KiB
C
116 lines
3.6 KiB
C
/*
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* Copyright (c) 2007 Mellanox Technologies. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/mlx4/qp.h>
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#include "mlx4_en.h"
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void mlx4_en_fill_qp_context(struct mlx4_en_priv *priv, int size, int stride,
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int is_tx, int rss, int qpn, int cqn,
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int user_prio, struct mlx4_qp_context *context)
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{
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struct mlx4_en_dev *mdev = priv->mdev;
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struct net_device *dev = priv->dev;
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memset(context, 0, sizeof *context);
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context->flags = cpu_to_be32(7 << 16 | rss << MLX4_RSS_QPC_FLAG_OFFSET);
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context->pd = cpu_to_be32(mdev->priv_pdn);
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context->mtu_msgmax = 0xff;
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if (!is_tx && !rss)
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context->rq_size_stride = ilog2(size) << 3 | (ilog2(stride) - 4);
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if (is_tx)
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context->sq_size_stride = ilog2(size) << 3 | (ilog2(stride) - 4);
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else
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context->sq_size_stride = ilog2(TXBB_SIZE) - 4;
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context->usr_page = cpu_to_be32(mdev->priv_uar.index);
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context->local_qpn = cpu_to_be32(qpn);
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context->pri_path.ackto = 1 & 0x07;
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context->pri_path.sched_queue = 0x83 | (priv->port - 1) << 6;
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if (user_prio >= 0) {
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context->pri_path.sched_queue |= user_prio << 3;
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context->pri_path.feup = MLX4_FEUP_FORCE_ETH_UP;
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}
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context->pri_path.counter_index = 0xff;
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context->cqn_send = cpu_to_be32(cqn);
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context->cqn_recv = cpu_to_be32(cqn);
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context->db_rec_addr = cpu_to_be64(priv->res.db.dma << 2);
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if (!(dev->features & NETIF_F_HW_VLAN_CTAG_RX))
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context->param3 |= cpu_to_be32(1 << 30);
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if (!is_tx && !rss &&
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(mdev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN)) {
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en_dbg(HW, priv, "Setting RX qp %x tunnel mode to RX tunneled & non-tunneled\n", qpn);
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context->srqn = cpu_to_be32(7 << 28); /* this fills bits 30:28 */
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}
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}
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int mlx4_en_map_buffer(struct mlx4_buf *buf)
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{
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struct page **pages;
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int i;
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if (BITS_PER_LONG == 64 || buf->nbufs == 1)
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return 0;
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pages = kmalloc(sizeof *pages * buf->nbufs, GFP_KERNEL);
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if (!pages)
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return -ENOMEM;
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for (i = 0; i < buf->nbufs; ++i)
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pages[i] = virt_to_page(buf->page_list[i].buf);
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buf->direct.buf = vmap(pages, buf->nbufs, VM_MAP, PAGE_KERNEL);
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kfree(pages);
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if (!buf->direct.buf)
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return -ENOMEM;
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return 0;
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}
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void mlx4_en_unmap_buffer(struct mlx4_buf *buf)
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{
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if (BITS_PER_LONG == 64 || buf->nbufs == 1)
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return;
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vunmap(buf->direct.buf);
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}
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void mlx4_en_sqp_event(struct mlx4_qp *qp, enum mlx4_event event)
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{
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return;
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}
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