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

   1 /*
   2  * Copyright (c) 2014,2017 Qualcomm Atheros, Inc.
   3  * Copyright (c) 2018, The Linux Foundation. All rights reserved.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #include <linux/etherdevice.h>
  19 #include <linux/pci.h>
  20 #include <linux/rtnetlink.h>
  21 #include <net/cfg80211.h>
  22
  23 #include "wil6210.h"
  24
  25 static int wil_ethtoolops_begin(struct net_device *ndev)
  26 {
  27         struct wil6210_priv *wil = ndev_to_wil(ndev);
  28
  29         mutex_lock(&wil->mutex);
  30
  31         wil_dbg_misc(wil, "ethtoolops_begin\n");
  32
  33         return 0;
  34 }
  35
  36 static void wil_ethtoolops_complete(struct net_device *ndev)
  37 {
  38         struct wil6210_priv *wil = ndev_to_wil(ndev);
  39
  40         wil_dbg_misc(wil, "ethtoolops_complete\n");
  41
  42         mutex_unlock(&wil->mutex);
  43 }
  44
  45 static int wil_ethtoolops_get_coalesce(struct net_device *ndev,
  46                                        struct ethtool_coalesce *cp)
  47 {
  48         struct wil6210_priv *wil = ndev_to_wil(ndev);
  49         u32 tx_itr_en, tx_itr_val = 0;
  50         u32 rx_itr_en, rx_itr_val = 0;
  51         int ret;
  52
  53         wil_dbg_misc(wil, "ethtoolops_get_coalesce\n");
  54
  55         ret = wil_pm_runtime_get(wil);
  56         if (ret < 0)
  57                 return ret;
  58
  59         tx_itr_en = wil_r(wil, RGF_DMA_ITR_TX_CNT_CTL);
  60         if (tx_itr_en & BIT_DMA_ITR_TX_CNT_CTL_EN)
  61                 tx_itr_val = wil_r(wil, RGF_DMA_ITR_TX_CNT_TRSH);
  62
  63         rx_itr_en = wil_r(wil, RGF_DMA_ITR_RX_CNT_CTL);
  64         if (rx_itr_en & BIT_DMA_ITR_RX_CNT_CTL_EN)
  65                 rx_itr_val = wil_r(wil, RGF_DMA_ITR_RX_CNT_TRSH);
  66
  67         wil_pm_runtime_put(wil);
  68
  69         cp->tx_coalesce_usecs = tx_itr_val;
  70         cp->rx_coalesce_usecs = rx_itr_val;
  71         return 0;
  72 }
  73
  74 static int wil_ethtoolops_set_coalesce(struct net_device *ndev,
  75                                        struct ethtool_coalesce *cp)
  76 {
  77         struct wil6210_priv *wil = ndev_to_wil(ndev);
  78         struct wireless_dev *wdev = ndev->ieee80211_ptr;
  79         int ret;
  80
  81         wil_dbg_misc(wil, "ethtoolops_set_coalesce: rx %d usec, tx %d usec\n",
  82                      cp->rx_coalesce_usecs, cp->tx_coalesce_usecs);
  83
  84         if (wdev->iftype == NL80211_IFTYPE_MONITOR) {
  85                 wil_dbg_misc(wil, "No IRQ coalescing in monitor mode\n");
  86                 return -EINVAL;
  87         }
  88
  89         /* only @rx_coalesce_usecs and @tx_coalesce_usecs supported,
  90          * ignore other parameters
  91          */
  92
  93         if (cp->rx_coalesce_usecs > WIL6210_ITR_TRSH_MAX ||
  94             cp->tx_coalesce_usecs > WIL6210_ITR_TRSH_MAX)
  95                 goto out_bad;
  96
  97         wil->tx_max_burst_duration = cp->tx_coalesce_usecs;
  98         wil->rx_max_burst_duration = cp->rx_coalesce_usecs;
  99
 100         ret = wil_pm_runtime_get(wil);
 101         if (ret < 0)
 102                 return ret;
 103
 104         wil->txrx_ops.configure_interrupt_moderation(wil);
 105
 106         wil_pm_runtime_put(wil);
 107
 108         return 0;
 109
 110 out_bad:
 111         wil_dbg_misc(wil, "Unsupported coalescing params. Raw command:\n");
 112         print_hex_dump_debug("DBG[MISC] coal ", DUMP_PREFIX_OFFSET, 16, 4,
 113                              cp, sizeof(*cp), false);
 114         return -EINVAL;
 115 }
 116
 117 static const struct ethtool_ops wil_ethtool_ops = {
 118         .begin          = wil_ethtoolops_begin,
 119         .complete       = wil_ethtoolops_complete,
 120         .get_drvinfo    = cfg80211_get_drvinfo,
 121         .get_coalesce   = wil_ethtoolops_get_coalesce,
 122         .set_coalesce   = wil_ethtoolops_set_coalesce,
 123 };
 124
 125 void wil_set_ethtoolops(struct net_device *ndev)
 126 {
 127         ndev->ethtool_ops = &wil_ethtool_ops;
 128 }