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}
114