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_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
 59static 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	int ret = wil_ioctl(wil, ifr->ifr_data, cmd);
 64
 65	wil_dbg_misc(wil, "ioctl(0x%04x) -> %d\n", cmd, ret);
 66
 67	return ret;
 68}
 69
 70static const struct net_device_ops wil_netdev_ops = {
 71	.ndo_open		= wil_open,
 72	.ndo_stop		= wil_stop,
 73	.ndo_start_xmit		= wil_start_xmit,
 74	.ndo_set_mac_address	= eth_mac_addr,
 75	.ndo_validate_addr	= eth_validate_addr,
 76	.ndo_change_mtu		= wil_change_mtu,
 77	.ndo_do_ioctl		= wil_do_ioctl,
 78};
 79
 80static int wil6210_netdev_poll_rx(struct napi_struct *napi, int budget)
 81{
 82	struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
 83						napi_rx);
 84	int quota = budget;
 85	int done;
 86
 87	wil_rx_handle(wil, &quota);
 88	done = budget - quota;
 89
 90	if (done < budget) {
 91		napi_complete(napi);
 92		wil6210_unmask_irq_rx(wil);
 93		wil_dbg_txrx(wil, "NAPI RX complete\n");
 94	}
 95
 96	wil_dbg_txrx(wil, "NAPI RX poll(%d) done %d\n", budget, done);
 97
 98	return done;
 99}
100
101static int wil6210_netdev_poll_tx(struct napi_struct *napi, int budget)
102{
103	struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
104						napi_tx);
105	int tx_done = 0;
106	uint i;
107
108	/* always process ALL Tx complete, regardless budget - it is fast */
109	for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
110		struct vring *vring = &wil->vring_tx[i];
111		struct vring_tx_data *txdata = &wil->vring_tx_data[i];
112
113		if (!vring->va || !txdata->enabled)
114			continue;
115
116		tx_done += wil_tx_complete(wil, i);
117	}
118
119	if (tx_done < budget) {
120		napi_complete(napi);
121		wil6210_unmask_irq_tx(wil);
122		wil_dbg_txrx(wil, "NAPI TX complete\n");
123	}
124
125	wil_dbg_txrx(wil, "NAPI TX poll(%d) done %d\n", budget, tx_done);
126
127	return min(tx_done, budget);
128}
129
130static void wil_dev_setup(struct net_device *dev)
131{
132	ether_setup(dev);
133	dev->tx_queue_len = WIL_TX_Q_LEN_DEFAULT;
134}
135
136void *wil_if_alloc(struct device *dev)
137{
138	struct net_device *ndev;
139	struct wireless_dev *wdev;
140	struct wil6210_priv *wil;
141	struct ieee80211_channel *ch;
142	int rc = 0;
143
144	wdev = wil_cfg80211_init(dev);
145	if (IS_ERR(wdev)) {
146		dev_err(dev, "wil_cfg80211_init failed\n");
147		return wdev;
148	}
149
150	wil = wdev_to_wil(wdev);
151	wil->wdev = wdev;
152
153	wil_dbg_misc(wil, "%s()\n", __func__);
154
155	rc = wil_priv_init(wil);
156	if (rc) {
157		dev_err(dev, "wil_priv_init failed\n");
158		goto out_wdev;
159	}
160
161	wdev->iftype = NL80211_IFTYPE_STATION; /* TODO */
162	/* default monitor channel */
163	ch = wdev->wiphy->bands[IEEE80211_BAND_60GHZ]->channels;
164	cfg80211_chandef_create(&wdev->preset_chandef, ch, NL80211_CHAN_NO_HT);
165
166	ndev = alloc_netdev(0, "wlan%d", NET_NAME_UNKNOWN, wil_dev_setup);
167	if (!ndev) {
168		dev_err(dev, "alloc_netdev_mqs failed\n");
169		rc = -ENOMEM;
170		goto out_priv;
171	}
172
173	ndev->netdev_ops = &wil_netdev_ops;
174	wil_set_ethtoolops(ndev);
175	ndev->ieee80211_ptr = wdev;
176	ndev->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM |
177			    NETIF_F_SG | NETIF_F_GRO |
178			    NETIF_F_TSO | NETIF_F_TSO6 |
179			    NETIF_F_RXHASH;
180
181	ndev->features |= ndev->hw_features;
182	SET_NETDEV_DEV(ndev, wiphy_dev(wdev->wiphy));
183	wdev->netdev = ndev;
184
185	netif_napi_add(ndev, &wil->napi_rx, wil6210_netdev_poll_rx,
186		       WIL6210_NAPI_BUDGET);
187	netif_tx_napi_add(ndev, &wil->napi_tx, wil6210_netdev_poll_tx,
188		       WIL6210_NAPI_BUDGET);
189
190	netif_tx_stop_all_queues(ndev);
191
192	return wil;
193
194 out_priv:
195	wil_priv_deinit(wil);
196
197 out_wdev:
198	wil_wdev_free(wil);
199
200	return ERR_PTR(rc);
201}
202
203void wil_if_free(struct wil6210_priv *wil)
204{
205	struct net_device *ndev = wil_to_ndev(wil);
206
207	wil_dbg_misc(wil, "%s()\n", __func__);
208
209	if (!ndev)
210		return;
211
212	wil_priv_deinit(wil);
213
214	wil_to_ndev(wil) = NULL;
215	free_netdev(ndev);
216
217	wil_wdev_free(wil);
218}
219
220int wil_if_add(struct wil6210_priv *wil)
221{
222	struct net_device *ndev = wil_to_ndev(wil);
223	int rc;
224
225	wil_dbg_misc(wil, "%s()\n", __func__);
226
227	rc = register_netdev(ndev);
228	if (rc < 0) {
229		dev_err(&ndev->dev, "Failed to register netdev: %d\n", rc);
230		return rc;
231	}
232
233	return 0;
234}
235
236void wil_if_remove(struct wil6210_priv *wil)
237{
238	struct net_device *ndev = wil_to_ndev(wil);
239
240	wil_dbg_misc(wil, "%s()\n", __func__);
241
242	unregister_netdev(ndev);
243}