1 /*
2  * Copyright (c) 2014,2017 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 
24 static 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, "ethtoolops_begin\n");
31 
32 	return 0;
33 }
34 
35 static void wil_ethtoolops_complete(struct net_device *ndev)
36 {
37 	struct wil6210_priv *wil = ndev_to_wil(ndev);
38 
39 	wil_dbg_misc(wil, "ethtoolops_complete\n");
40 
41 	mutex_unlock(&wil->mutex);
42 }
43 
44 static 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 	int ret;
51 
52 	wil_dbg_misc(wil, "ethtoolops_get_coalesce\n");
53 
54 	ret = wil_pm_runtime_get(wil);
55 	if (ret < 0)
56 		return ret;
57 
58 	tx_itr_en = wil_r(wil, RGF_DMA_ITR_TX_CNT_CTL);
59 	if (tx_itr_en & BIT_DMA_ITR_TX_CNT_CTL_EN)
60 		tx_itr_val = wil_r(wil, RGF_DMA_ITR_TX_CNT_TRSH);
61 
62 	rx_itr_en = wil_r(wil, RGF_DMA_ITR_RX_CNT_CTL);
63 	if (rx_itr_en & BIT_DMA_ITR_RX_CNT_CTL_EN)
64 		rx_itr_val = wil_r(wil, RGF_DMA_ITR_RX_CNT_TRSH);
65 
66 	wil_pm_runtime_put(wil);
67 
68 	cp->tx_coalesce_usecs = tx_itr_val;
69 	cp->rx_coalesce_usecs = rx_itr_val;
70 	return 0;
71 }
72 
73 static int wil_ethtoolops_set_coalesce(struct net_device *ndev,
74 				       struct ethtool_coalesce *cp)
75 {
76 	struct wil6210_priv *wil = ndev_to_wil(ndev);
77 	int ret;
78 
79 	wil_dbg_misc(wil, "ethtoolops_set_coalesce: rx %d usec, tx %d usec\n",
80 		     cp->rx_coalesce_usecs, cp->tx_coalesce_usecs);
81 
82 	if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) {
83 		wil_dbg_misc(wil, "No IRQ coalescing in monitor mode\n");
84 		return -EINVAL;
85 	}
86 
87 	/* only @rx_coalesce_usecs and @tx_coalesce_usecs supported,
88 	 * ignore other parameters
89 	 */
90 
91 	if (cp->rx_coalesce_usecs > WIL6210_ITR_TRSH_MAX ||
92 	    cp->tx_coalesce_usecs > WIL6210_ITR_TRSH_MAX)
93 		goto out_bad;
94 
95 	wil->tx_max_burst_duration = cp->tx_coalesce_usecs;
96 	wil->rx_max_burst_duration = cp->rx_coalesce_usecs;
97 
98 	ret = wil_pm_runtime_get(wil);
99 	if (ret < 0)
100 		return ret;
101 
102 	wil_configure_interrupt_moderation(wil);
103 
104 	wil_pm_runtime_put(wil);
105 
106 	return 0;
107 
108 out_bad:
109 	wil_dbg_misc(wil, "Unsupported coalescing params. Raw command:\n");
110 	print_hex_dump_debug("DBG[MISC] coal ", DUMP_PREFIX_OFFSET, 16, 4,
111 			     cp, sizeof(*cp), false);
112 	return -EINVAL;
113 }
114 
115 static const struct ethtool_ops wil_ethtool_ops = {
116 	.begin		= wil_ethtoolops_begin,
117 	.complete	= wil_ethtoolops_complete,
118 	.get_drvinfo	= cfg80211_get_drvinfo,
119 	.get_coalesce	= wil_ethtoolops_get_coalesce,
120 	.set_coalesce	= wil_ethtoolops_set_coalesce,
121 };
122 
123 void wil_set_ethtoolops(struct net_device *ndev)
124 {
125 	ndev->ethtool_ops = &wil_ethtool_ops;
126 }
127