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 = ioread32(wil->csr +
  54                              HOSTADDR(RGF_DMA_ITR_TX_CNT_CTL));
  55         if (tx_itr_en & BIT_DMA_ITR_TX_CNT_CTL_EN)
  56                 tx_itr_val =
  57                         ioread32(wil->csr +
  58                                  HOSTADDR(RGF_DMA_ITR_TX_CNT_TRSH));
  59
  60         rx_itr_en = ioread32(wil->csr +
  61                              HOSTADDR(RGF_DMA_ITR_RX_CNT_CTL));
  62         if (rx_itr_en & BIT_DMA_ITR_RX_CNT_CTL_EN)
  63                 rx_itr_val =
  64                         ioread32(wil->csr +
  65                                  HOSTADDR(RGF_DMA_ITR_RX_CNT_TRSH));
  66
  67         cp->tx_coalesce_usecs = tx_itr_val;
  68         cp->rx_coalesce_usecs = rx_itr_val;
  69         return 0;
  70 }
  71
  72 static int wil_ethtoolops_set_coalesce(struct net_device *ndev,
  73                                        struct ethtool_coalesce *cp)
  74 {
  75         struct wil6210_priv *wil = ndev_to_wil(ndev);
  76
  77         wil_dbg_misc(wil, "%s(rx %d usec, tx %d usec)\n", __func__,
  78                      cp->rx_coalesce_usecs, cp->tx_coalesce_usecs);
  79
  80         if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) {
  81                 wil_dbg_misc(wil, "No IRQ coalescing in monitor mode\n");
  82                 return -EINVAL;
  83         }
  84
  85         /* only @rx_coalesce_usecs and @tx_coalesce_usecs supported,
  86          * ignore other parameters
  87          */
  88
  89         if (cp->rx_coalesce_usecs > WIL6210_ITR_TRSH_MAX ||
  90             cp->tx_coalesce_usecs > WIL6210_ITR_TRSH_MAX)
  91                 goto out_bad;
  92
  93         wil->tx_max_burst_duration = cp->tx_coalesce_usecs;
  94         wil->rx_max_burst_duration = cp->rx_coalesce_usecs;
  95         wil_configure_interrupt_moderation(wil);
  96
  97         return 0;
  98
  99 out_bad:
 100         wil_dbg_misc(wil, "Unsupported coalescing params. Raw command:\n");
 101         print_hex_dump_debug("DBG[MISC] coal ", DUMP_PREFIX_OFFSET, 16, 4,
 102                              cp, sizeof(*cp), false);
 103         return -EINVAL;
 104 }
 105
 106 static const struct ethtool_ops wil_ethtool_ops = {
 107         .begin          = wil_ethtoolops_begin,
 108         .complete       = wil_ethtoolops_complete,
 109         .get_drvinfo    = cfg80211_get_drvinfo,
 110         .get_coalesce   = wil_ethtoolops_get_coalesce,
 111         .set_coalesce   = wil_ethtoolops_set_coalesce,
 112 };
 113
 114 void wil_set_ethtoolops(struct net_device *ndev)
 115 {
 116         ndev->ethtool_ops = &wil_ethtool_ops;
 117 }