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