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 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 70 static 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 80 static 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, "a); 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 } 100 101 static 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 } 129 130 static void wil_dev_setup(struct net_device *dev) 131 { 132 ether_setup(dev); 133 dev->tx_queue_len = WIL_TX_Q_LEN_DEFAULT; 134 } 135 136 void *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 } 202 203 void 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 } 219 220 int 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 } 235 236 void 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 } 244