mlx4_en_resources.c

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    1 /*
    2  * Copyright (c) 2007, 2014 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 <dev/mlx4/qp.h>
   37 
   38 #include "en.h"
   39 
   40 
   41 void mlx4_en_fill_qp_context(struct mlx4_en_priv *priv, int size, int stride,
   42                              int is_tx, int rss, int qpn, int cqn,
   43                              int user_prio, struct mlx4_qp_context *context)
   44 {
   45         struct mlx4_en_dev *mdev = priv->mdev;
   46         struct ifnet *dev = priv->dev;
   47 
   48         memset(context, 0, sizeof *context);
   49         context->flags = cpu_to_be32(7 << 16 | rss << MLX4_RSS_QPC_FLAG_OFFSET);
   50         context->pd = cpu_to_be32(mdev->priv_pdn);
   51         context->mtu_msgmax = 0xff;
   52         if (!is_tx && !rss)
   53                 context->rq_size_stride = ilog2(size) << 3 | (ilog2(stride) - 4);
   54         if (is_tx)
   55                 context->sq_size_stride = ilog2(size) << 3 | (ilog2(stride) - 4);
   56         else
   57                 context->sq_size_stride = ilog2(TXBB_SIZE) - 4;
   58         context->usr_page = cpu_to_be32(mdev->priv_uar.index);
   59         context->local_qpn = cpu_to_be32(qpn);
   60         context->pri_path.ackto = 1 & 0x07;
   61         context->pri_path.sched_queue = 0x83 | (priv->port - 1) << 6;
   62         if (user_prio >= 0) {
   63                 context->pri_path.sched_queue |= user_prio << 3;
   64                 context->pri_path.feup = 1 << 6;
   65         }
   66         context->pri_path.counter_index = (u8)(priv->counter_index);
   67         if (!rss &&
   68             (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_LB_SRC_CHK) &&
   69             context->pri_path.counter_index != 0xFF) {
   70                 /* disable multicast loopback to qp with same counter */
   71                 context->pri_path.fl |= MLX4_FL_ETH_SRC_CHECK_MC_LB;
   72                 context->pri_path.vlan_control |=
   73                         MLX4_CTRL_ETH_SRC_CHECK_IF_COUNTER;
   74         }
   75 
   76         context->cqn_send = cpu_to_be32(cqn);
   77         context->cqn_recv = cpu_to_be32(cqn);
   78         context->db_rec_addr = cpu_to_be64(priv->res.db.dma << 2);
   79         if (!(dev->if_capabilities & IFCAP_VLAN_HWCSUM))
   80                 context->param3 |= cpu_to_be32(1 << 30);
   81 }
   82 
   83 
   84 int mlx4_en_map_buffer(struct mlx4_buf *buf)
   85 {
   86         struct page **pages;
   87         int i;
   88 
   89         // if nbufs == 1 - there is no need to vmap 
   90         // if buf->direct.buf is not NULL it means that vmap was already done by mlx4_alloc_buff
   91         if (buf->direct.buf != NULL || buf->nbufs == 1)
   92                 return 0;
   93 
   94         pages = kmalloc(sizeof *pages * buf->nbufs, GFP_KERNEL);
   95         if (!pages)
   96                 return -ENOMEM;
   97 
   98         for (i = 0; i < buf->nbufs; ++i)
   99                 pages[i] = virt_to_page(buf->page_list[i].buf);
  100 
  101         buf->direct.buf = vmap(pages, buf->nbufs, VM_MAP, PAGE_KERNEL);
  102         kfree(pages);
  103         if (!buf->direct.buf)
  104                 return -ENOMEM;
  105 
  106         return 0;
  107 }
  108 
  109 void mlx4_en_unmap_buffer(struct mlx4_buf *buf)
  110 {
  111         if (BITS_PER_LONG == 64 || buf->nbufs == 1)
  112                 return;
  113 
  114         vunmap(buf->direct.buf);
  115 }
  116 
  117 void mlx4_en_sqp_event(struct mlx4_qp *qp, enum mlx4_event event)
  118 {
  119     return;
  120 }
  121

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FreeBSD/Linux Kernel Cross Reference sys/dev/mlx4/mlx4_en/mlx4_en_resources.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/mlx4/mlx4_en/mlx4_en_resources.c