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