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 
14 static int
15 wil_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 
46 out:
47 	mutex_unlock(&wil->mutex);
48 	return ret;
49 }
50 
51 static int
52 wil_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 
91 out:
92 	mutex_unlock(&wil->mutex);
93 	return ret;
94 
95 out_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 
103 static 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 
110 void wil_set_ethtoolops(struct net_device *ndev)
111 {
112 	ndev->ethtool_ops = &wil_ethtool_ops;
113 }
114