cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

ethtool.c (2864B)

      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}