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 itr_en, itr_val = 0;
  49
  50         wil_dbg_misc(wil, "%s()\n", __func__);
  51
  52         itr_en = ioread32(wil->csr + HOSTADDR(RGF_DMA_ITR_CNT_CRL));
  53         if (itr_en & BIT_DMA_ITR_CNT_CRL_EN)
  54                 itr_val = ioread32(wil->csr + HOSTADDR(RGF_DMA_ITR_CNT_TRSH));
  55
  56         cp->rx_coalesce_usecs = itr_val;
  57
  58         return 0;
  59 }
  60
  61 static int wil_ethtoolops_set_coalesce(struct net_device *ndev,
  62                                        struct ethtool_coalesce *cp)
  63 {
  64         struct wil6210_priv *wil = ndev_to_wil(ndev);
  65
  66         wil_dbg_misc(wil, "%s(%d usec)\n", __func__, cp->rx_coalesce_usecs);
  67
  68         if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) {
  69                 wil_dbg_misc(wil, "No IRQ coalescing in monitor mode\n");
  70                 return -EINVAL;
  71         }
  72
  73         /* only @rx_coalesce_usecs supported, ignore
  74          * other parameters
  75          */
  76
  77         if (cp->rx_coalesce_usecs > WIL6210_ITR_TRSH_MAX)
  78                 goto out_bad;
  79
  80         wil->itr_trsh = cp->rx_coalesce_usecs;
  81         wil_set_itr_trsh(wil);
  82
  83         return 0;
  84
  85 out_bad:
  86         wil_dbg_misc(wil, "Unsupported coalescing params. Raw command:\n");
  87         print_hex_dump_debug("DBG[MISC] coal ", DUMP_PREFIX_OFFSET, 16, 4,
  88                              cp, sizeof(*cp), false);
  89         return -EINVAL;
  90 }
  91
  92 static const struct ethtool_ops wil_ethtool_ops = {
  93         .begin          = wil_ethtoolops_begin,
  94         .complete       = wil_ethtoolops_complete,
  95         .get_drvinfo    = cfg80211_get_drvinfo,
  96         .get_coalesce   = wil_ethtoolops_get_coalesce,
  97         .set_coalesce   = wil_ethtoolops_set_coalesce,
  98 };
  99
 100 void wil_set_ethtoolops(struct net_device *ndev)
 101 {
 102         ndev->ethtool_ops = &wil_ethtool_ops;
 103 }