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_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 51 static 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 60 static 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, "a); 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 81 static 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 } 109 110 static 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 } 116 117 void *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 } 177 178 void 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 } 194 195 int 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; 226 227 out_wiphy: 228 wiphy_unregister(wdev->wiphy); 229 return rc; 230 } 231 232 void 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 } 242