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, "a); 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