LXR linux/drivers/infiniband/ulp/ipoib/ipoib

   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#include <linux/kernel.h>
  34#include <linux/ethtool.h>
  35#include <linux/netdevice.h>
  36
  37#include "ipoib.h"
  38
  39static void ipoib_get_drvinfo(struct net_device *netdev,
  40                              struct ethtool_drvinfo *drvinfo)
  41{
  42        struct ipoib_dev_priv *priv = netdev_priv(netdev);
  43        struct ib_device_attr *attr;
  44
  45        attr = kmalloc(sizeof(*attr), GFP_KERNEL);
  46        if (attr && !ib_query_device(priv->ca, attr))
  47                snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
  48                         "%d.%d.%d", (int)(attr->fw_ver >> 32),
  49                         (int)(attr->fw_ver >> 16) & 0xffff,
  50                         (int)attr->fw_ver & 0xffff);
  51        kfree(attr);
  52
  53        strlcpy(drvinfo->bus_info, dev_name(priv->ca->dma_device),
  54                sizeof(drvinfo->bus_info));
  55
  56        strlcpy(drvinfo->version, ipoib_driver_version,
  57                sizeof(drvinfo->version));
  58
  59        strlcpy(drvinfo->driver, "ib_ipoib", sizeof(drvinfo->driver));
  60}
  61
  62static int ipoib_get_coalesce(struct net_device *dev,
  63                              struct ethtool_coalesce *coal)
  64{
  65        struct ipoib_dev_priv *priv = netdev_priv(dev);
  66
  67        coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs;
  68        coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
  69
  70        return 0;
  71}
  72
  73static int ipoib_set_coalesce(struct net_device *dev,
  74                              struct ethtool_coalesce *coal)
  75{
  76        struct ipoib_dev_priv *priv = netdev_priv(dev);
  77        int ret;
  78
  79        /*
  80         * These values are saved in the private data and returned
  81         * when ipoib_get_coalesce() is called
  82         */
  83        if (coal->rx_coalesce_usecs       > 0xffff ||
  84            coal->rx_max_coalesced_frames > 0xffff)
  85                return -EINVAL;
  86
  87        ret = ib_modify_cq(priv->recv_cq, coal->rx_max_coalesced_frames,
  88                           coal->rx_coalesce_usecs);
  89        if (ret && ret != -ENOSYS) {
  90                ipoib_warn(priv, "failed modifying CQ (%d)\n", ret);
  91                return ret;
  92        }
  93
  94        priv->ethtool.coalesce_usecs       = coal->rx_coalesce_usecs;
  95        priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames;
  96
  97        return 0;
  98}
  99
 100static const struct ethtool_ops ipoib_ethtool_ops = {
 101        .get_drvinfo            = ipoib_get_drvinfo,
 102        .get_coalesce           = ipoib_get_coalesce,
 103        .set_coalesce           = ipoib_set_coalesce,
 104};
 105
 106void ipoib_set_ethtool_ops(struct net_device *dev)
 107{
 108        SET_ETHTOOL_OPS(dev, &ipoib_ethtool_ops);
 109}
 110