drivers/net/ethernet/mellanox/mlx4/en_resources.c

   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
  40 void 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
  80 int 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
 103 void 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
 111 void mlx4_en_sqp_event(struct mlx4_qp *qp, enum mlx4_event event)
 112 {
 113     return;
 114 }
 115