kernel/drivers/net/wireless/ath/wil6210/ethtool.c

   1 /*
   2  * Copyright (c) 2014 Qualcomm Atheros, Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <linux/etherdevice.h>
  18 #include <linux/pci.h>
  19 #include <linux/rtnetlink.h>
  20 #include <net/cfg80211.h>
  21
  22 #include "wil6210.h"
  23
  24 static int wil_ethtoolops_begin(struct net_device *ndev)
  25 {
  26         struct wil6210_priv *wil = ndev_to_wil(ndev);
  27
  28         mutex_lock(&wil->mutex);
  29
  30         wil_dbg_misc(wil, "%s()\n", __func__);
  31
  32         return 0;
  33 }
  34
  35 static void wil_ethtoolops_complete(struct net_device *ndev)
  36 {
  37         struct wil6210_priv *wil = ndev_to_wil(ndev);
  38
  39         wil_dbg_misc(wil, "%s()\n", __func__);
  40
  41         mutex_unlock(&wil->mutex);
  42 }
  43
  44 static int wil_ethtoolops_get_coalesce(struct net_device *ndev,
  45                                        struct ethtool_coalesce *cp)
  46 {
  47         struct wil6210_priv *wil = ndev_to_wil(ndev);
  48         u32 tx_itr_en, tx_itr_val = 0;
  49         u32 rx_itr_en, rx_itr_val = 0;
  50
  51         wil_dbg_misc(wil, "%s()\n", __func__);
  52
  53         tx_itr_en = wil_r(wil, RGF_DMA_ITR_TX_CNT_CTL);
  54         if (tx_itr_en & BIT_DMA_ITR_TX_CNT_CTL_EN)
  55                 tx_itr_val = wil_r(wil, RGF_DMA_ITR_TX_CNT_TRSH);
  56
  57         rx_itr_en = wil_r(wil, RGF_DMA_ITR_RX_CNT_CTL);
  58         if (rx_itr_en & BIT_DMA_ITR_RX_CNT_CTL_EN)
  59                 rx_itr_val = wil_r(wil, RGF_DMA_ITR_RX_CNT_TRSH);
  60
  61         cp->tx_coalesce_usecs = tx_itr_val;
  62         cp->rx_coalesce_usecs = rx_itr_val;
  63         return 0;
  64 }
  65
  66 static int wil_ethtoolops_set_coalesce(struct net_device *ndev,
  67                                        struct ethtool_coalesce *cp)
  68 {
  69         struct wil6210_priv *wil = ndev_to_wil(ndev);
  70
  71         wil_dbg_misc(wil, "%s(rx %d usec, tx %d usec)\n", __func__,
  72                      cp->rx_coalesce_usecs, cp->tx_coalesce_usecs);
  73
  74         if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) {
  75                 wil_dbg_misc(wil, "No IRQ coalescing in monitor mode\n");
  76                 return -EINVAL;
  77         }
  78
  79         /* only @rx_coalesce_usecs and @tx_coalesce_usecs supported,
  80          * ignore other parameters
  81          */
  82
  83         if (cp->rx_coalesce_usecs > WIL6210_ITR_TRSH_MAX ||
  84             cp->tx_coalesce_usecs > WIL6210_ITR_TRSH_MAX)
  85                 goto out_bad;
  86
  87         wil->tx_max_burst_duration = cp->tx_coalesce_usecs;
  88         wil->rx_max_burst_duration = cp->rx_coalesce_usecs;
  89         wil_configure_interrupt_moderation(wil);
  90
  91         return 0;
  92
  93 out_bad:
  94         wil_dbg_misc(wil, "Unsupported coalescing params. Raw command:\n");
  95         print_hex_dump_debug("DBG[MISC] coal ", DUMP_PREFIX_OFFSET, 16, 4,
  96                              cp, sizeof(*cp), false);
  97         return -EINVAL;
  98 }
  99
 100 static const struct ethtool_ops wil_ethtool_ops = {
 101         .begin          = wil_ethtoolops_begin,
 102         .complete       = wil_ethtoolops_complete,
 103         .get_drvinfo    = cfg80211_get_drvinfo,
 104         .get_coalesce   = wil_ethtoolops_get_coalesce,
 105         .set_coalesce   = wil_ethtoolops_set_coalesce,
 106 };
 107
 108 void wil_set_ethtoolops(struct net_device *ndev)
 109 {
 110         ndev->ethtool_ops = &wil_ethtool_ops;
 111 }