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

   1 /*
   2  * Copyright (c) 2014,2017 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, "ethtoolops_begin\n");
  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, "ethtoolops_complete\n");
  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         int ret;
  51
  52         wil_dbg_misc(wil, "ethtoolops_get_coalesce\n");
  53
  54         ret = wil_pm_runtime_get(wil);
  55         if (ret < 0)
  56                 return ret;
  57
  58         tx_itr_en = wil_r(wil, RGF_DMA_ITR_TX_CNT_CTL);
  59         if (tx_itr_en & BIT_DMA_ITR_TX_CNT_CTL_EN)
  60                 tx_itr_val = wil_r(wil, RGF_DMA_ITR_TX_CNT_TRSH);
  61
  62         rx_itr_en = wil_r(wil, RGF_DMA_ITR_RX_CNT_CTL);
  63         if (rx_itr_en & BIT_DMA_ITR_RX_CNT_CTL_EN)
  64                 rx_itr_val = wil_r(wil, RGF_DMA_ITR_RX_CNT_TRSH);
  65
  66         wil_pm_runtime_put(wil);
  67
  68         cp->tx_coalesce_usecs = tx_itr_val;
  69         cp->rx_coalesce_usecs = rx_itr_val;
  70         return 0;
  71 }
  72
  73 static int wil_ethtoolops_set_coalesce(struct net_device *ndev,
  74                                        struct ethtool_coalesce *cp)
  75 {
  76         struct wil6210_priv *wil = ndev_to_wil(ndev);
  77         int ret;
  78
  79         wil_dbg_misc(wil, "ethtoolops_set_coalesce: rx %d usec, tx %d usec\n",
  80                      cp->rx_coalesce_usecs, cp->tx_coalesce_usecs);
  81
  82         if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) {
  83                 wil_dbg_misc(wil, "No IRQ coalescing in monitor mode\n");
  84                 return -EINVAL;
  85         }
  86
  87         /* only @rx_coalesce_usecs and @tx_coalesce_usecs supported,
  88          * ignore other parameters
  89          */
  90
  91         if (cp->rx_coalesce_usecs > WIL6210_ITR_TRSH_MAX ||
  92             cp->tx_coalesce_usecs > WIL6210_ITR_TRSH_MAX)
  93                 goto out_bad;
  94
  95         wil->tx_max_burst_duration = cp->tx_coalesce_usecs;
  96         wil->rx_max_burst_duration = cp->rx_coalesce_usecs;
  97
  98         ret = wil_pm_runtime_get(wil);
  99         if (ret < 0)
 100                 return ret;
 101
 102         wil_configure_interrupt_moderation(wil);
 103
 104         wil_pm_runtime_put(wil);
 105
 106         return 0;
 107
 108 out_bad:
 109         wil_dbg_misc(wil, "Unsupported coalescing params. Raw command:\n");
 110         print_hex_dump_debug("DBG[MISC] coal ", DUMP_PREFIX_OFFSET, 16, 4,
 111                              cp, sizeof(*cp), false);
 112         return -EINVAL;
 113 }
 114
 115 static const struct ethtool_ops wil_ethtool_ops = {
 116         .begin          = wil_ethtoolops_begin,
 117         .complete       = wil_ethtoolops_complete,
 118         .get_drvinfo    = cfg80211_get_drvinfo,
 119         .get_coalesce   = wil_ethtoolops_get_coalesce,
 120         .set_coalesce   = wil_ethtoolops_set_coalesce,
 121 };
 122
 123 void wil_set_ethtoolops(struct net_device *ndev)
 124 {
 125         ndev->ethtool_ops = &wil_ethtool_ops;
 126 }