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
 25static 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
 36static 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
 45static 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
 74static 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_configure_interrupt_moderation(wil);
105
106	wil_pm_runtime_put(wil);
107
108	return 0;
109
110out_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
117static 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
125void wil_set_ethtoolops(struct net_device *ndev)
126{
127	ndev->ethtool_ops = &wil_ethtool_ops;
128}