LXR linux/drivers/net/ethernet/mellanox/mlx4/en

   1/*
   2 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
   3 *
   4 * This software is available to you under a choice of one of two
   5 * licenses.  You may choose to be licensed under the terms of the GNU
   6 * General Public License (GPL) Version 2, available from the file
   7 * COPYING in the main directory of this source tree, or the
   8 * OpenIB.org BSD license below:
   9 *
  10 *     Redistribution and use in source and binary forms, with or
  11 *     without modification, are permitted provided that the following
  12 *     conditions are met:
  13 *
  14 *      - Redistributions of source code must retain the above
  15 *        copyright notice, this list of conditions and the following
  16 *        disclaimer.
  17 *
  18 *      - Redistributions in binary form must reproduce the above
  19 *        copyright notice, this list of conditions and the following
  20 *        disclaimer in the documentation and/or other materials
  21 *        provided with the distribution.
  22 *
  23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30 * SOFTWARE.
  31 *
  32 */
  33
  34#include <linux/slab.h>
  35#include <linux/vmalloc.h>
  36#include <linux/mlx4/qp.h>
  37
  38#include "mlx4_en.h"
  39
  40void mlx4_en_fill_qp_context(struct mlx4_en_priv *priv, int size, int stride,
  41                             int is_tx, int rss, int qpn, int cqn,
  42                             int user_prio, struct mlx4_qp_context *context)
  43{
  44        struct mlx4_en_dev *mdev = priv->mdev;
  45        struct net_device *dev = priv->dev;
  46
  47        memset(context, 0, sizeof *context);
  48        context->flags = cpu_to_be32(7 << 16 | rss << MLX4_RSS_QPC_FLAG_OFFSET);
  49        context->pd = cpu_to_be32(mdev->priv_pdn);
  50        context->mtu_msgmax = 0xff;
  51        if (!is_tx && !rss)
  52                context->rq_size_stride = ilog2(size) << 3 | (ilog2(stride) - 4);
  53        if (is_tx)
  54                context->sq_size_stride = ilog2(size) << 3 | (ilog2(stride) - 4);
  55        else
  56                context->sq_size_stride = ilog2(TXBB_SIZE) - 4;
  57        context->usr_page = cpu_to_be32(mdev->priv_uar.index);
  58        context->local_qpn = cpu_to_be32(qpn);
  59        context->pri_path.ackto = 1 & 0x07;
  60        context->pri_path.sched_queue = 0x83 | (priv->port - 1) << 6;
  61        if (user_prio >= 0) {
  62                context->pri_path.sched_queue |= user_prio << 3;
  63                context->pri_path.feup = MLX4_FEUP_FORCE_ETH_UP;
  64        }
  65        context->pri_path.counter_index = 0xff;
  66        context->cqn_send = cpu_to_be32(cqn);
  67        context->cqn_recv = cpu_to_be32(cqn);
  68        context->db_rec_addr = cpu_to_be64(priv->res.db.dma << 2);
  69        if (!(dev->features & NETIF_F_HW_VLAN_CTAG_RX))
  70                context->param3 |= cpu_to_be32(1 << 30);
  71
  72        if (!is_tx && !rss &&
  73            (mdev->dev->caps.tunnel_offload_mode ==  MLX4_TUNNEL_OFFLOAD_MODE_VXLAN)) {
  74                en_dbg(HW, priv, "Setting RX qp %x tunnel mode to RX tunneled & non-tunneled\n", qpn);
  75                context->srqn = cpu_to_be32(7 << 28); /* this fills bits 30:28 */
  76        }
  77}
  78
  79
  80int mlx4_en_map_buffer(struct mlx4_buf *buf)
  81{
  82        struct page **pages;
  83        int i;
  84
  85        if (BITS_PER_LONG == 64 || buf->nbufs == 1)
  86                return 0;
  87
  88        pages = kmalloc(sizeof *pages * buf->nbufs, GFP_KERNEL);
  89        if (!pages)
  90                return -ENOMEM;
  91
  92        for (i = 0; i < buf->nbufs; ++i)
  93                pages[i] = virt_to_page(buf->page_list[i].buf);
  94
  95        buf->direct.buf = vmap(pages, buf->nbufs, VM_MAP, PAGE_KERNEL);
  96        kfree(pages);
  97        if (!buf->direct.buf)
  98                return -ENOMEM;
  99
 100        return 0;
 101}
 102
 103void mlx4_en_unmap_buffer(struct mlx4_buf *buf)
 104{
 105        if (BITS_PER_LONG == 64 || buf->nbufs == 1)
 106                return;
 107
 108        vunmap(buf->direct.buf);
 109}
 110
 111void mlx4_en_sqp_event(struct mlx4_qp *qp, enum mlx4_event event)
 112{
 113    return;
 114}
 115
 116