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  1// SPDX-License-Identifier: ISC
  2/*
  3 * Copyright (c) 2014,2017 Qualcomm Atheros, Inc.
  4 * Copyright (c) 2018, The Linux Foundation. All rights reserved.
  5 */
  6
  7#include <linux/etherdevice.h>
  8#include <linux/pci.h>
  9#include <linux/rtnetlink.h>
 10#include <net/cfg80211.h>
 11
 12#include "wil6210.h"
 13
 14static int
 15wil_ethtoolops_get_coalesce(struct net_device *ndev,
 16			    struct ethtool_coalesce *cp,
 17			    struct kernel_ethtool_coalesce *kernel_coal,
 18			    struct netlink_ext_ack *extack)
 19{
 20	struct wil6210_priv *wil = ndev_to_wil(ndev);
 21	u32 tx_itr_en, tx_itr_val = 0;
 22	u32 rx_itr_en, rx_itr_val = 0;
 23	int ret;
 24
 25	mutex_lock(&wil->mutex);
 26	wil_dbg_misc(wil, "ethtoolops_get_coalesce\n");
 27
 28	ret = wil_pm_runtime_get(wil);
 29	if (ret < 0)
 30		goto out;
 31
 32	tx_itr_en = wil_r(wil, RGF_DMA_ITR_TX_CNT_CTL);
 33	if (tx_itr_en & BIT_DMA_ITR_TX_CNT_CTL_EN)
 34		tx_itr_val = wil_r(wil, RGF_DMA_ITR_TX_CNT_TRSH);
 35
 36	rx_itr_en = wil_r(wil, RGF_DMA_ITR_RX_CNT_CTL);
 37	if (rx_itr_en & BIT_DMA_ITR_RX_CNT_CTL_EN)
 38		rx_itr_val = wil_r(wil, RGF_DMA_ITR_RX_CNT_TRSH);
 39
 40	wil_pm_runtime_put(wil);
 41
 42	cp->tx_coalesce_usecs = tx_itr_val;
 43	cp->rx_coalesce_usecs = rx_itr_val;
 44	ret = 0;
 45
 46out:
 47	mutex_unlock(&wil->mutex);
 48	return ret;
 49}
 50
 51static int
 52wil_ethtoolops_set_coalesce(struct net_device *ndev,
 53			    struct ethtool_coalesce *cp,
 54			    struct kernel_ethtool_coalesce *kernel_coal,
 55			    struct netlink_ext_ack *extack)
 56{
 57	struct wil6210_priv *wil = ndev_to_wil(ndev);
 58	struct wireless_dev *wdev = ndev->ieee80211_ptr;
 59	int ret;
 60
 61	mutex_lock(&wil->mutex);
 62	wil_dbg_misc(wil, "ethtoolops_set_coalesce: rx %d usec, tx %d usec\n",
 63		     cp->rx_coalesce_usecs, cp->tx_coalesce_usecs);
 64
 65	if (wdev->iftype == NL80211_IFTYPE_MONITOR) {
 66		wil_dbg_misc(wil, "No IRQ coalescing in monitor mode\n");
 67		ret = -EINVAL;
 68		goto out;
 69	}
 70
 71	/* only @rx_coalesce_usecs and @tx_coalesce_usecs supported,
 72	 * ignore other parameters
 73	 */
 74
 75	if (cp->rx_coalesce_usecs > WIL6210_ITR_TRSH_MAX ||
 76	    cp->tx_coalesce_usecs > WIL6210_ITR_TRSH_MAX)
 77		goto out_bad;
 78
 79	wil->tx_max_burst_duration = cp->tx_coalesce_usecs;
 80	wil->rx_max_burst_duration = cp->rx_coalesce_usecs;
 81
 82	ret = wil_pm_runtime_get(wil);
 83	if (ret < 0)
 84		goto out;
 85
 86	wil->txrx_ops.configure_interrupt_moderation(wil);
 87
 88	wil_pm_runtime_put(wil);
 89	ret = 0;
 90
 91out:
 92	mutex_unlock(&wil->mutex);
 93	return ret;
 94
 95out_bad:
 96	wil_dbg_misc(wil, "Unsupported coalescing params. Raw command:\n");
 97	print_hex_dump_debug("DBG[MISC] coal ", DUMP_PREFIX_OFFSET, 16, 4,
 98			     cp, sizeof(*cp), false);
 99	mutex_unlock(&wil->mutex);
100	return -EINVAL;
101}
102
103static const struct ethtool_ops wil_ethtool_ops = {
104	.supported_coalesce_params = ETHTOOL_COALESCE_USECS,
105	.get_drvinfo	= cfg80211_get_drvinfo,
106	.get_coalesce	= wil_ethtoolops_get_coalesce,
107	.set_coalesce	= wil_ethtoolops_set_coalesce,
108};
109
110void wil_set_ethtoolops(struct net_device *ndev)
111{
112	ndev->ethtool_ops = &wil_ethtool_ops;
113}