1/*
2 * Copyright (c) 2014 Qualcomm Atheros, Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#include <linux/etherdevice.h>
18#include <linux/pci.h>
19#include <linux/rtnetlink.h>
20#include <net/cfg80211.h>
21
22#include "wil6210.h"
23
24static int wil_ethtoolops_begin(struct net_device *ndev)
25{
26	struct wil6210_priv *wil = ndev_to_wil(ndev);
27
28	mutex_lock(&wil->mutex);
29
30	wil_dbg_misc(wil, "%s()\n", __func__);
31
32	return 0;
33}
34
35static void wil_ethtoolops_complete(struct net_device *ndev)
36{
37	struct wil6210_priv *wil = ndev_to_wil(ndev);
38
39	wil_dbg_misc(wil, "%s()\n", __func__);
40
41	mutex_unlock(&wil->mutex);
42}
43
44static int wil_ethtoolops_get_coalesce(struct net_device *ndev,
45				       struct ethtool_coalesce *cp)
46{
47	struct wil6210_priv *wil = ndev_to_wil(ndev);
48	u32 tx_itr_en, tx_itr_val = 0;
49	u32 rx_itr_en, rx_itr_val = 0;
50
51	wil_dbg_misc(wil, "%s()\n", __func__);
52
53	tx_itr_en = ioread32(wil->csr +
54			     HOSTADDR(RGF_DMA_ITR_TX_CNT_CTL));
55	if (tx_itr_en & BIT_DMA_ITR_TX_CNT_CTL_EN)
56		tx_itr_val =
57			ioread32(wil->csr +
58				 HOSTADDR(RGF_DMA_ITR_TX_CNT_TRSH));
59
60	rx_itr_en = ioread32(wil->csr +
61			     HOSTADDR(RGF_DMA_ITR_RX_CNT_CTL));
62	if (rx_itr_en & BIT_DMA_ITR_RX_CNT_CTL_EN)
63		rx_itr_val =
64			ioread32(wil->csr +
65				 HOSTADDR(RGF_DMA_ITR_RX_CNT_TRSH));
66
67	cp->tx_coalesce_usecs = tx_itr_val;
68	cp->rx_coalesce_usecs = rx_itr_val;
69	return 0;
70}
71
72static int wil_ethtoolops_set_coalesce(struct net_device *ndev,
73				       struct ethtool_coalesce *cp)
74{
75	struct wil6210_priv *wil = ndev_to_wil(ndev);
76
77	wil_dbg_misc(wil, "%s(rx %d usec, tx %d usec)\n", __func__,
78		     cp->rx_coalesce_usecs, cp->tx_coalesce_usecs);
79
80	if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) {
81		wil_dbg_misc(wil, "No IRQ coalescing in monitor mode\n");
82		return -EINVAL;
83	}
84
85	/* only @rx_coalesce_usecs and @tx_coalesce_usecs supported,
86	 * ignore other parameters
87	 */
88
89	if (cp->rx_coalesce_usecs > WIL6210_ITR_TRSH_MAX ||
90	    cp->tx_coalesce_usecs > WIL6210_ITR_TRSH_MAX)
91		goto out_bad;
92
93	wil->tx_max_burst_duration = cp->tx_coalesce_usecs;
94	wil->rx_max_burst_duration = cp->rx_coalesce_usecs;
95	wil_configure_interrupt_moderation(wil);
96
97	return 0;
98
99out_bad:
100	wil_dbg_misc(wil, "Unsupported coalescing params. Raw command:\n");
101	print_hex_dump_debug("DBG[MISC] coal ", DUMP_PREFIX_OFFSET, 16, 4,
102			     cp, sizeof(*cp), false);
103	return -EINVAL;
104}
105
106static const struct ethtool_ops wil_ethtool_ops = {
107	.begin		= wil_ethtoolops_begin,
108	.complete	= wil_ethtoolops_complete,
109	.get_drvinfo	= cfg80211_get_drvinfo,
110	.get_coalesce	= wil_ethtoolops_get_coalesce,
111	.set_coalesce	= wil_ethtoolops_set_coalesce,
112};
113
114void wil_set_ethtoolops(struct net_device *ndev)
115{
116	ndev->ethtool_ops = &wil_ethtool_ops;
117}
118