xref: /linux/drivers/net/wireless/ath/wil6210/netdev.c (revision 0883c2c06fb5bcf5b9e008270827e63c09a88c1e)
1 /*
2  * Copyright (c) 2012-2016 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 "wil6210.h"
19 #include "txrx.h"
20 
21 static int wil_open(struct net_device *ndev)
22 {
23 	struct wil6210_priv *wil = ndev_to_wil(ndev);
24 
25 	wil_dbg_misc(wil, "%s()\n", __func__);
26 
27 	if (debug_fw) {
28 		wil_err(wil, "%s() while in debug_fw mode\n", __func__);
29 		return -EINVAL;
30 	}
31 
32 	return wil_up(wil);
33 }
34 
35 static int wil_stop(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 	return wil_down(wil);
42 }
43 
44 static int wil_change_mtu(struct net_device *ndev, int new_mtu)
45 {
46 	struct wil6210_priv *wil = ndev_to_wil(ndev);
47 
48 	if (new_mtu < 68 || new_mtu > mtu_max) {
49 		wil_err(wil, "invalid MTU %d\n", new_mtu);
50 		return -EINVAL;
51 	}
52 
53 	wil_dbg_misc(wil, "change MTU %d -> %d\n", ndev->mtu, new_mtu);
54 	ndev->mtu = new_mtu;
55 
56 	return 0;
57 }
58 
59 static int wil_do_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd)
60 {
61 	struct wil6210_priv *wil = ndev_to_wil(ndev);
62 
63 	return wil_ioctl(wil, ifr->ifr_data, cmd);
64 }
65 
66 static const struct net_device_ops wil_netdev_ops = {
67 	.ndo_open		= wil_open,
68 	.ndo_stop		= wil_stop,
69 	.ndo_start_xmit		= wil_start_xmit,
70 	.ndo_set_mac_address	= eth_mac_addr,
71 	.ndo_validate_addr	= eth_validate_addr,
72 	.ndo_change_mtu		= wil_change_mtu,
73 	.ndo_do_ioctl		= wil_do_ioctl,
74 };
75 
76 static int wil6210_netdev_poll_rx(struct napi_struct *napi, int budget)
77 {
78 	struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
79 						napi_rx);
80 	int quota = budget;
81 	int done;
82 
83 	wil_rx_handle(wil, &quota);
84 	done = budget - quota;
85 
86 	if (done < budget) {
87 		napi_complete(napi);
88 		wil6210_unmask_irq_rx(wil);
89 		wil_dbg_txrx(wil, "NAPI RX complete\n");
90 	}
91 
92 	wil_dbg_txrx(wil, "NAPI RX poll(%d) done %d\n", budget, done);
93 
94 	return done;
95 }
96 
97 static int wil6210_netdev_poll_tx(struct napi_struct *napi, int budget)
98 {
99 	struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
100 						napi_tx);
101 	int tx_done = 0;
102 	uint i;
103 
104 	/* always process ALL Tx complete, regardless budget - it is fast */
105 	for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
106 		struct vring *vring = &wil->vring_tx[i];
107 		struct vring_tx_data *txdata = &wil->vring_tx_data[i];
108 
109 		if (!vring->va || !txdata->enabled)
110 			continue;
111 
112 		tx_done += wil_tx_complete(wil, i);
113 	}
114 
115 	if (tx_done < budget) {
116 		napi_complete(napi);
117 		wil6210_unmask_irq_tx(wil);
118 		wil_dbg_txrx(wil, "NAPI TX complete\n");
119 	}
120 
121 	wil_dbg_txrx(wil, "NAPI TX poll(%d) done %d\n", budget, tx_done);
122 
123 	return min(tx_done, budget);
124 }
125 
126 static void wil_dev_setup(struct net_device *dev)
127 {
128 	ether_setup(dev);
129 	dev->tx_queue_len = WIL_TX_Q_LEN_DEFAULT;
130 }
131 
132 void *wil_if_alloc(struct device *dev)
133 {
134 	struct net_device *ndev;
135 	struct wireless_dev *wdev;
136 	struct wil6210_priv *wil;
137 	struct ieee80211_channel *ch;
138 	int rc = 0;
139 
140 	wdev = wil_cfg80211_init(dev);
141 	if (IS_ERR(wdev)) {
142 		dev_err(dev, "wil_cfg80211_init failed\n");
143 		return wdev;
144 	}
145 
146 	wil = wdev_to_wil(wdev);
147 	wil->wdev = wdev;
148 	wil->radio_wdev = wdev;
149 
150 	wil_dbg_misc(wil, "%s()\n", __func__);
151 
152 	rc = wil_priv_init(wil);
153 	if (rc) {
154 		dev_err(dev, "wil_priv_init failed\n");
155 		goto out_wdev;
156 	}
157 
158 	wdev->iftype = NL80211_IFTYPE_STATION; /* TODO */
159 	/* default monitor channel */
160 	ch = wdev->wiphy->bands[NL80211_BAND_60GHZ]->channels;
161 	cfg80211_chandef_create(&wdev->preset_chandef, ch, NL80211_CHAN_NO_HT);
162 
163 	ndev = alloc_netdev(0, "wlan%d", NET_NAME_UNKNOWN, wil_dev_setup);
164 	if (!ndev) {
165 		dev_err(dev, "alloc_netdev_mqs failed\n");
166 		rc = -ENOMEM;
167 		goto out_priv;
168 	}
169 
170 	ndev->netdev_ops = &wil_netdev_ops;
171 	wil_set_ethtoolops(ndev);
172 	ndev->ieee80211_ptr = wdev;
173 	ndev->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM |
174 			    NETIF_F_SG | NETIF_F_GRO |
175 			    NETIF_F_TSO | NETIF_F_TSO6 |
176 			    NETIF_F_RXHASH;
177 
178 	ndev->features |= ndev->hw_features;
179 	SET_NETDEV_DEV(ndev, wiphy_dev(wdev->wiphy));
180 	wdev->netdev = ndev;
181 
182 	netif_napi_add(ndev, &wil->napi_rx, wil6210_netdev_poll_rx,
183 		       WIL6210_NAPI_BUDGET);
184 	netif_tx_napi_add(ndev, &wil->napi_tx, wil6210_netdev_poll_tx,
185 		       WIL6210_NAPI_BUDGET);
186 
187 	netif_tx_stop_all_queues(ndev);
188 
189 	return wil;
190 
191  out_priv:
192 	wil_priv_deinit(wil);
193 
194  out_wdev:
195 	wil_wdev_free(wil);
196 
197 	return ERR_PTR(rc);
198 }
199 
200 void wil_if_free(struct wil6210_priv *wil)
201 {
202 	struct net_device *ndev = wil_to_ndev(wil);
203 
204 	wil_dbg_misc(wil, "%s()\n", __func__);
205 
206 	if (!ndev)
207 		return;
208 
209 	wil_priv_deinit(wil);
210 
211 	wil_to_ndev(wil) = NULL;
212 	free_netdev(ndev);
213 
214 	wil_wdev_free(wil);
215 }
216 
217 int wil_if_add(struct wil6210_priv *wil)
218 {
219 	struct net_device *ndev = wil_to_ndev(wil);
220 	int rc;
221 
222 	wil_dbg_misc(wil, "%s()\n", __func__);
223 
224 	rc = register_netdev(ndev);
225 	if (rc < 0) {
226 		dev_err(&ndev->dev, "Failed to register netdev: %d\n", rc);
227 		return rc;
228 	}
229 
230 	return 0;
231 }
232 
233 void wil_if_remove(struct wil6210_priv *wil)
234 {
235 	struct net_device *ndev = wil_to_ndev(wil);
236 
237 	wil_dbg_misc(wil, "%s()\n", __func__);
238 
239 	unregister_netdev(ndev);
240 }
241